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/incron/tags/incron-0.5.7/incron.conf.5
0,0 → 1,44
.TH "incron.conf" "5" "0.5.7" "Lukas Jelinek" "incron documentation"
.SH "NAME"
/etc/incron.conf \- main config file for inotify cron (incron)
.SH "DESCRIPTION"
The file \fI/etc/incron.conf\fR contains default settings for the program
.BR incrond.
Each line holds a single value pair in the form \fIoption\fR = \fIvalue\fR.
Comment lines must have a hash sign (#) in the first line.
.P
The valid configuration options are:
.TP
\fBsystem_table_dir\fP
This directory is examined by incrond for system table files.
.BR Default : \fI/etc/incron.d\fR
.TP
\fBuser_table_dir\fP
This directory is examined by incrond for user table files.
.BR Default : \fI/var/spool/incron\fR
.TP
\fBallowed_users\fP
This file contains users allowed to use incron.
.BR Default : \fI/etc/incron.allow\fR
.TP
\fBdenied_users\fP
This file contains users denied to use incron.
.BR Default : \fI/etc/incron.deny\fR
.TP
\fBlockfile_dir\fP
This directory is used for creating a lock avoiding to run multiple instances
of incrond.
.BR Default : \fI/var/run\fR
.TP
\fBlockfile_name\fP
This name (appended by '.pid') is used for creating a lock avoiding to run multiple instances of incrond.
.BR Default : \fIincrond\fR
.TP
\fBeditor\fP
This name or path is used to run as an editor for editting incron tables. Default \fIno editor\fR is given, system editor used, this option overide this.
.SH "SEE ALSO"
incrond(8), incrontab(1), incrontab(5)
.SH "AUTHOR"
Lukas Jelinek <lukas@aiken.cz>
.SH "COPYING"
This program is free software. It can be used, redistributed and/or modified under the terms of the GNU General Public License, version 2.

/incron/tags/incron-0.5.7/ict-main.cpp
0,0 → 1,545
/// inotify cron table manipulator main file
/**
* \file ict-main.cpp
*
* inotify cron system
*
* Copyright (C) 2006, 2007 Lukas Jelinek, <lukas@aiken.cz>
*
* This program is free software; you can use it, redistribute
* it and/or modify it under the terms of the GNU General Public
* License, version 2 (see LICENSE-GPL).
*
*/
#include <argp.h>
#include <pwd.h>
#include <string>
#include <stdio.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/inotify.h>
#include <fcntl.h>
#include <stdlib.h>
#include <limits.h>
#include "inotify-cxx.h"
#include "appargs.h"
#include "incron.h"
#include "incrontab.h"
#include "incroncfg.h"
/// Alternative editor
#define INCRON_ALT_EDITOR "/etc/alternatives/editor"
/// Default (hard-wired) editor
#define INCRON_DEFAULT_EDITOR "vim"
/// incrontab version string
#define INCRONTAB_VERSION INCRONTAB_NAME " " INCRON_VERSION
/// incrontab description string
#define INCRONTAB_DESCRIPTION "incrontab - inotify cron table manipulator\n" \
"(c) Lukas Jelinek, 2006, 2007"
/// incrontab help string
#define INCRONTAB_HELP INCRONTAB_DESCRIPTION "\n\n" \
"usage: incrontab [<options>] <operation>\n" \
" incrontab [<options>] <FILE-TO-IMPORT>\n\n" \
"<operation> may be one of the following:\n" \
" -?, --about gives short information about program\n" \
" -h, --help prints this help text\n" \
" -l, --list lists user table\n" \
" -r, --remove removes user table\n" \
" -e, --edit provides editting user table\n" \
" -t, --types list supported event types\n" \
" -d, --reload request incrond to reload user table\n" \
" -V, --version prints program version\n\n" \
"\n" \
"These options may be used:\n" \
" -u <USER>, --user=<USER> overrides current user (requires root privileges)\n" \
" -f <FILE>, --config=<FILE> overrides default configuration file (requires root privileges)\n\n" \
"For reporting bugs please use http:://bts.aiken.cz\n"
/// Copies a file to an user table.
/**
* \param[in] rPath path to file
* \param[in] rUser user name
* \return true = success, false = failure
*/
bool copy_from_file(const std::string& rPath, const std::string& rUser)
{
fprintf(stderr, "copying table from file '%s'\n", rPath.c_str());
IncronTab tab;
std::string s(rPath);
if (s == "-")
s = "/dev/stdin";
if (!tab.Load(s)) {
fprintf(stderr, "cannot load table from file '%s'\n", rPath.c_str());
return false;
}
std::string out(IncronTab::GetUserTablePath(rUser));
if (!tab.Save(out)) {
fprintf(stderr, "cannot create table for user '%s'\n", rUser.c_str());
return false;
}
return true;
}
/// Removes an user table.
/**
* \param[in] rUser user name
* \return true = success, false = failure
*/
bool remove_table(const std::string& rUser)
{
fprintf(stderr, "removing table for user '%s'\n", rUser.c_str());
std::string tp(IncronTab::GetUserTablePath(rUser));
if (unlink(tp.c_str()) != 0) {
if (errno == ENOENT) {
fprintf(stderr, "table for user '%s' does not exist\n", rUser.c_str());
return true;
}
else {
fprintf(stderr, "cannot remove table for user '%s': %s\n", rUser.c_str(), strerror(errno));
return false;
}
}
fprintf(stderr, "table for user '%s' successfully removed\n", rUser.c_str());
return true;
}
/// Lists an user table.
/**
* \param[in] rUser user name
* \return true = success, false = failure
*/
bool list_table(const std::string& rUser)
{
std::string tp(IncronTab::GetUserTablePath(rUser));
FILE* f = fopen(tp.c_str(), "r");
if (f == NULL) {
if (errno == ENOENT) {
fprintf(stderr, "no table for %s\n", rUser.c_str());
return true;
}
else {
fprintf(stderr, "cannot read table for '%s': %s\n", rUser.c_str(), strerror(errno));
return false;
}
}
char s[1024];
while (fgets(s, 1024, f) != NULL) {
fputs(s, stdout);
}
fclose(f);
return true;
}
/// Allows to edit an user table.
/**
* \param[in] rUser user name
* \return true = success, false = failure
*
* \attention This function is very complex and may contain
* various bugs including security ones. Please keep
* it in mind..
*/
bool edit_table(const std::string& rUser)
{
std::string tp(IncronTab::GetUserTablePath(rUser));
struct passwd* ppwd = getpwnam(rUser.c_str());
if (ppwd == NULL) {
fprintf(stderr, "cannot find user '%s': %s\n", rUser.c_str(), strerror(errno));
return false;
}
uid_t uid = ppwd->pw_uid;
uid_t gid = ppwd->pw_gid;
char s[NAME_MAX];
strcpy(s, "/tmp/incron.table-XXXXXX");
uid_t iu = geteuid();
uid_t ig = getegid();
if (setegid(gid) != 0 || seteuid(uid) != 0) {
fprintf(stderr, "cannot change effective UID/GID for user '%s': %s\n", rUser.c_str(), strerror(errno));
return false;
}
int fd = mkstemp(s);
if (fd == -1) {
fprintf(stderr, "cannot create temporary file: %s\n", strerror(errno));
return false;
}
bool ok = false;
FILE* out = NULL;
FILE* in = NULL;
time_t mt = (time_t) 0;
const char* e = NULL;
std::string ed;
if (setegid(ig) != 0 || seteuid(iu) != 0) {
fprintf(stderr, "cannot change effective UID/GID: %s\n", strerror(errno));
close(fd);
goto end;
}
out = fdopen(fd, "w");
if (out == NULL) {
fprintf(stderr, "cannot write to temporary file: %s\n", strerror(errno));
close(fd);
goto end;
}
in = fopen(tp.c_str(), "r");
if (in == NULL) {
if (errno == ENOENT) {
in = fopen("/dev/null", "r");
if (in == NULL) {
fprintf(stderr, "cannot get empty table for '%s': %s\n", rUser.c_str(), strerror(errno));
fclose(out);
goto end;
}
}
else {
fprintf(stderr, "cannot read old table for '%s': %s\n", rUser.c_str(), strerror(errno));
fclose(out);
goto end;
}
}
char buf[1024];
while (fgets(buf, 1024, in) != NULL) {
fputs(buf, out);
}
fclose(in);
fclose(out);
struct stat st;
if (stat(s, &st) != 0) {
fprintf(stderr, "cannot stat temporary file: %s\n", strerror(errno));
goto end;
}
mt = st.st_mtime; // save modification time for detecting its change
// Editor selecting algorithm:
// 1. Check EDITOR environment variable
// 2. Check VISUAL environment variable
// 3. Try to get from configuration
// 4. Check presence of /etc/alternatives/editor
// 5. Use hard-wired editor
e = getenv("EDITOR");
if (e == NULL) {
e = getenv("VISUAL");
if (e == NULL) {
if (!IncronCfg::GetValue("editor", ed))
throw InotifyException("configuration is corrupted", EINVAL);
if (!ed.empty()) {
e = ed.c_str();
}
else {
if (access(INCRON_ALT_EDITOR, X_OK) == 0)
e = INCRON_ALT_EDITOR;
else
e = INCRON_DEFAULT_EDITOR;
}
}
}
// this block is explicite due to gotos' usage simplification
{
pid_t pid = fork();
if (pid == 0) {
if (setgid(gid) != 0 || setuid(uid) != 0) {
fprintf(stderr, "cannot set user '%s': %s\n", rUser.c_str(), strerror(errno));
goto end;
}
execlp(e, e, s, (const char*) NULL);
_exit(1);
}
else if (pid > 0) {
int status;
if (wait(&status) != pid) {
perror("error while waiting for editor");
goto end;
}
if (!(WIFEXITED(status)) || WEXITSTATUS(status) != 0) {
perror("editor finished with error");
goto end;
}
}
else {
perror("cannot start editor");
goto end;
}
}
if (stat(s, &st) != 0) {
fprintf(stderr, "cannot stat temporary file: %s\n", strerror(errno));
goto end;
}
if (st.st_mtime == mt) {
fprintf(stderr, "table unchanged\n");
ok = true;
goto end;
}
{
IncronTab ict;
if (ict.Load(s) && ict.Save(tp)) {
if (chmod(tp.c_str(), S_IRUSR | S_IWUSR) != 0) {
fprintf(stderr, "cannot change mode of temporary file: %s\n", strerror(errno));
}
}
else {
fprintf(stderr, "cannot move temporary table: %s\n", strerror(errno));
goto end;
}
}
ok = true;
fprintf(stderr, "table updated\n");
end:
unlink(s);
return ok;
}
/// Prints the list of all available inotify event types.
void list_types()
{
printf( "IN_ACCESS,IN_MODIFY,IN_ATTRIB,IN_CLOSE_WRITE,"\
"IN_CLOSE_NOWRITE,IN_OPEN,IN_MOVED_FROM,IN_MOVED_TO,"\
"IN_CREATE,IN_DELETE,IN_DELETE_SELF,IN_CLOSE,IN_MOVE,"\
"IN_ONESHOT,IN_ALL_EVENTS");
#ifdef IN_DONT_FOLLOW
printf(",IN_DONT_FOLLOW");
#endif // IN_DONT_FOLLOW
#ifdef IN_ONLYDIR
printf(",IN_ONLYDIR");
#endif // IN_ONLYDIR
#ifdef IN_MOVE_SELF
printf(",IN_MOVE_SELF");
#endif // IN_MOVE_SELF
printf("\n");
}
/// Reloads an user table.
/**
* \param[in] rUser user name
* \return true = success, false = otherwise
*/
bool reload_table(const std::string& rUser)
{
fprintf(stderr, "requesting table reload for user '%s'...\n", rUser.c_str());
std::string tp(IncronTab::GetUserTablePath(rUser));
int fd = open(tp.c_str(), O_WRONLY | O_APPEND);
if (fd == -1) {
if (errno == ENOENT) {
fprintf(stderr, "no table for '%s'\n", rUser.c_str());
return true;
}
else {
fprintf(stderr, "cannot access table for '%s': %s\n", rUser.c_str(), strerror(errno));
return false;
}
}
close(fd);
fprintf(stderr, "request done\n");
return true;
}
int main(int argc, char** argv)
{
AppArgs::Init();
if (!( AppArgs::AddOption("about", '?', AAT_NO_VALUE, false)
&& AppArgs::AddOption("help", 'h', AAT_NO_VALUE, false)
&& AppArgs::AddOption("list", 'l', AAT_NO_VALUE, false)
&& AppArgs::AddOption("remove", 'r', AAT_NO_VALUE, false)
&& AppArgs::AddOption("edit", 'e', AAT_NO_VALUE, false)
&& AppArgs::AddOption("types", 't', AAT_NO_VALUE, false)
&& AppArgs::AddOption("reload", 'd', AAT_NO_VALUE, false)
&& AppArgs::AddOption("user", 'u', AAT_MANDATORY_VALUE, false)
&& AppArgs::AddOption("config", 'f', AAT_MANDATORY_VALUE, false)
&& AppArgs::AddOption("version", 'V', AAT_NO_VALUE, false)))
{
fprintf(stderr, "error while initializing application");
return 1;
}
AppArgs::Parse(argc, argv);
if (AppArgs::ExistsOption("help")) {
fprintf(stderr, "%s\n", INCRONTAB_HELP);
return 0;
}
if (AppArgs::ExistsOption("about")) {
fprintf(stderr, "%s\n", INCRONTAB_DESCRIPTION);
return 0;
}
if (AppArgs::ExistsOption("version")) {
fprintf(stderr, "%s\n", INCRONTAB_VERSION);
return 0;
}
bool oper = AppArgs::ExistsOption("list")
|| AppArgs::ExistsOption("remove")
|| AppArgs::ExistsOption("edit")
|| AppArgs::ExistsOption("types")
|| AppArgs::ExistsOption("reload");
size_t vals = AppArgs::GetValueCount();
if (!oper && vals == 0) {
fprintf(stderr, "invalid arguments - specify operation or source file\n");
return 1;
}
if (oper && vals > 0) {
fprintf(stderr, "invalid arguments - operation and source file cannot be combined\n");
return 1;
}
uid_t uid = getuid();
std::string user;
bool chuser = AppArgs::GetOption("user", user);
if (uid != 0 && chuser) {
fprintf(stderr, "cannot override user to '%s': insufficient privileges\n", user.c_str());
return 1;
}
struct passwd pwd;
if (!chuser) {
struct passwd* ppwd = getpwuid(uid);
if (ppwd == NULL) {
fprintf(stderr, "cannot determine current user\n");
return 1;
}
memcpy(&pwd, ppwd, sizeof(pwd));
user = pwd.pw_name;
}
else if (getpwnam(user.c_str()) == NULL) {
fprintf(stderr, "user '%s' not found\n", user.c_str());
return 1;
}
else if ( setenv("LOGNAME", pwd.pw_name, 1) != 0
|| setenv("USER", pwd.pw_name, 1) != 0
|| setenv("USERNAME", pwd.pw_name, 1) != 0
|| setenv("HOME", pwd.pw_dir, 1) != 0
|| setenv("SHELL", pwd.pw_shell, 1) != 0)
{
perror("cannot set environment variables");
return 1;
}
try {
IncronCfg::Init();
std::string cfg(INCRON_CONFIG);
if (AppArgs::GetOption("config", cfg)) {
if (uid != 0) {
fprintf(stderr, "insufficient privileges to use custom configuration (will use default)\n");
}
else if (euidaccess(cfg.c_str(), R_OK) != 0) {
perror("cannot read configuration file (will use default)");
}
}
IncronCfg::Load(cfg);
if (!IncronTab::CheckUser(user)) {
fprintf(stderr, "user '%s' is not allowed to use incron\n", user.c_str());
return 1;
}
if (!oper) {
std::string file;
if (!AppArgs::GetValue(0, file)
|| !copy_from_file(file, user))
{
return 1;
}
}
else {
if (AppArgs::ExistsOption("list")) {
if (!list_table(user))
return 1;
}
else if (AppArgs::ExistsOption("remove")) {
if (!remove_table(user))
return 1;
}
else if (AppArgs::ExistsOption("edit")) {
if (!edit_table(user))
return 1;
}
else if (AppArgs::ExistsOption("types")) {
list_types();
}
else if (AppArgs::ExistsOption("reload")) {
if (!reload_table(user))
return 1;
}
else {
fprintf(stderr, "invalid usage\n");
return 1;
}
}
return 0;
} catch (InotifyException e) {
fprintf(stderr, "*** unhandled exception occurred ***\n");
fprintf(stderr, "%s\n", e.GetMessage().c_str());
fprintf(stderr, "error: (%i) %s\n", e.GetErrorNumber(), strerror(e.GetErrorNumber()));
return 1;
}
}

/incron/tags/incron-0.5.7/incrontab.5
0,0 → 1,98
.TH "incrontab" "5" "0.5.7" "Lukas Jelinek" "incron documentation"
.SH "NAME"
incrontab \- tables for driving inotify cron (incron)
.SH "DESCRIPTION"
An incrontab file contains instructions to the \fIincrond\fR(8) daemon of the general form: "run this command on these file events". There are two categories of tables: system tables (with root privileges) and user tables (with user privileges).
System tables are (by default) located in /etc/incron.d and may have any names. Each system table exists separately inside incron and their watches never collide.
Each user has their own table, and commands in any given incrontab will be executed as the user who owns the incrontab. System users (such as apache, postfix, nobody etc.) may have their own incrontab.
incrontab files are read when the \fIincrond\fR(8) daemon starts and after any change (incrontab file are being hooked when incrond is running).
Blank lines are ignored. The general line format is the following:
<path> <mask> <command>
Where \fIpath\fR is an absolute filesystem path, \fImask\fR is an event mask (in symbolic or numeric form) and \fIcommand\fR is an executable file (or a script) with its arguments. See bellow for event mask symbols. The executable file may be noted as an absolute path or only as the name itself (PATH locations are examined).
Please remember that the same path may occur only once per table (otherwise only the first occurrence takes effect and an error message is emitted to the system log).
.SH "EVENT SYMBOLS"
These basic event mask symbols are defined:
\fBIN_ACCESS\fR File was accessed (read) (*)
.br
\fBIN_ATTRIB\fR Metadata changed (permissions, timestamps, extended attributes, etc.) (*)
.br
\fBIN_CLOSE_WRITE\fR File opened for writing was closed (*)
.br
\fBIN_CLOSE_NOWRITE\fR File not opened for writing was closed (*)
.br
\fBIN_CREATE\fR File/directory created in watched directory (*)
.br
\fBIN_DELETE\fR File/directory deleted from watched directory (*)
.br
\fBIN_DELETE_SELF\fR Watched file/directory was itself deleted
.br
\fBIN_MODIFY\fR File was modified (*)
.br
\fBIN_MOVE_SELF\fR Watched file/directory was itself moved
.br
\fBIN_MOVED_FROM\fR File moved out of watched directory (*)
.br
\fBIN_MOVED_TO\fR File moved into watched directory (*)
.br
\fBIN_OPEN\fR File was opened (*)
When monitoring a directory, the events marked with an asterisk (*) above can occur for files in the directory, in which case the name field in the returned event data identifies the name of the file within the directory.
The \fBIN_ALL_EVENTS\fR symbol is defined as a bit mask of all of the above events. Two additional convenience symbols are \fBIN_MOVE\fR, which is a combination of \fBIN_MOVED_FROM\fR and \fBIN_MOVED_TO\fR, and \fBIN_CLOSE\fR which combines \fBIN_CLOSE_WRITE\fR and \fBIN_CLOSE_NOWRITE\fR.
The following further symbols can be specified in the mask:
\fBIN_DONT_FOLLOW\fR Don't dereference pathname if it is a symbolic link
.br
\fBIN_ONESHOT\fR Monitor pathname for only one event
.br
\fBIN_ONLYDIR\fR Only watch pathname if it is a directory
Additionaly, there is a symbol which doesn't appear in the inotify symbol set. It it \fBIN_NO_LOOP\fR. This symbol disables monitoring events until the current one is completely handled (until its child process exits).
.SH "WILDCARDS"
The following wildards may be used inside command specification:
\fB$$\fR dollar sign
.br
\fB$@\fR watched filesystem path (see above)
.br
\fB$#\fR event-related file name
.br
\fB$%\fR event flags (textually)
.br
\fB$&\fR event flags (numerically)
.SH "EXAMPLE"
These are some example rules which can be used in an incrontab file:
\fB/tmp IN_ALL_EVENTS abcd $@/$# $%\fR
\fB/usr/bin IN_ACCESS,IN_NO_LOOP abcd $#\fR
\fB/home IN_CREATE /usr/local/bin/abcd $#\fR
\fB/var/log 12 abcd $@/$#\fR
The first line monitors all events on the /tmp directory. When an event occurs it runs a application called 'abcd' with the full path of the file as the first arguments and the event flags as the second one.
The second line monitors accesses (readings) on the /usr/bin directory. The application 'abcd' is run as a handler and the appropriate event watch is disabled until the program finishes. The file name (without the directory path) is passed in as an argument.
The third example is used for monitoring the /home directory for newly create files or directories (it practically means an event is sent when a new user is added). This event is processed by a program specified by an absolute path.
And the final line shows how to use numeric event mask instead of textual one. The value 12 is exactly the same as IN_ATTRIB,IN_CLOSE_WRITE.
.SH "SEE ALSO"
incrond(8), incrontab(1), incron.conf(5)
.SH "AUTHOR"
Lukas Jelinek <lukas@aiken.cz>
.SH "COPYING"
This program is free software. It can be used, redistributed and/or modified under the terms of the GNU General Public License, version 2.

/incron/tags/incron-0.5.7/CHANGELOG
0,0 → 1,126
0.5.7 2007-09-04
* man pages updated (mainly due to #0000157)
* some includes added for GCC 4.3 compatibility (#0000158)
* supplementary groups initialization (#0000167)
0.5.6 2007-04-18
* based on inotify-cxx 0.7.2 (fixes compilation problems on Debian Sarge, #0000155)
0.5.5 2007-02-14
* another bug related to environment variables fixed (#0000151)
* -V (--version) malfunction fixed (#0000150)
0.5.4 2007-02-11
* bug related to persisting environment fixed (#0000149)
* incrond(8) man page updated to explain how the environment is treated
* buggy example configuration file fixed
0.5.3 2007-02-08
* bug related to ignoring new tables fixed (#0000142)
* explicit typecasting in execlp() call (#0000145)
* memory leak related to loaded tables fixed (#0000144)
* documentation for 'incrontab -d' added (#0000146)
* man page for incron.conf added (#0000147)
0.5.2 2007-02-04
* lockfile permissions changed to 0644 (reopened #0000137)
* incorrect reporting of removing non-existing tables fixed (#0000141)
0.5.1 2007-01-28
* lockfile location problems fixed (#0000137)
* lockfile configuration failure fixed (#0000140)
* CRLFs inside LICENCE-GPL changed to LFs (#0000138)
0.5.0 2007-01-27
* based on inotify-cxx 0.7.1
* bug related to events names fixed (#0000134)
* instance locking (only one instance allowed - also fixes #0000136)
* configuration introduced (including custom cfg. files)
* waiting for child processes rewritten to avoid race conditions
* user can request reloading the table (#0000130)
* new implementation for command line arguments
* some code refactoring
0.4.0 2007-01-13
* based on inotify-cxx 0.7.0
* incrontab has a feature to find out supported event types (--types or -t)
* incrond now supports command line arguments
* incrond can be run on foreground (--foreground, -n)
* incrond can be simply stopped (--kill, -k)
* support for system tables (/etc/incron.d) added
* eaccess() replaced by euiaccess() (#0000125)
* each table now use its own inotify descriptor (#0000129)
* descriptors are closed on executing child processes
0.3.5 2007-01-09
* based on inotify-cxx 0.6.3
* a security bug related to access rights to watched files fixed (#0000119)
* crashing on table reload after removing a watched path fixed (#0000123)
* 'incrontab --list' dysfunction fixed (#0000122)
0.3.4 2007-01-03
* based on inotify-cxx 0.6.2
* problems with wrong ordered setting of UID/GID fixed (#0000115, #0000117)
* user tables have 0600 permission now
0.3.3 2006-12-15
* based on inotify-cxx 0.5.3
* "GID ignorance" bug fixed (#0000109)
* "zombie bug" fixed (#0000105)
* code cleanup and simplifying
0.3.2 2006-12-02
* problems with reiserfs fixed (#0000104)
0.3.1 2006-11-24
* user manual added
* incron tables now owned by root (also fixes #0000103)
0.3.0 2006-11-12
* based on inotify-cxx 0.5.2 (fixes a problem with ignoring IN_OPEN)
* two new special symbols ($% for flags as names, $& for numeric flags)
* whitespaces in paths now allowed (by prepending a backslash) (#0000098)
* some changes in logging etc.
0.2.3 2006-10-30
* problems with unwanted IN_NO_LOOP have been fixed (#0000097)
0.2.2 2006-10-29
* based on inotify-cxx 0.5.0
* 'uncleaned children' bug has been fixed (#0000095)
* memory leak (child process arguments) has been fixed (#0000096)
0.2.1 2006-10-14
* based on inotify-cxx 0.4.1 (it should also fix crashing as described in #0000085)
* build failure (due to missing 'useradd -M') on some distributions has been fixed
(#0000094)
* tarball structure has been fixed (#0000089)
* documentation slightly improved
0.2.0 2006-10-04
* based on inotify-cxx 0.3.1
* better signal handling (no "dirty" wait() in a handler)
* loop avoidance can be used
* more documentation in the code
0.1.0 2006-09-15
* first alpha version

/incron/tags/incron-0.5.7/usertable.cpp
0,0 → 1,564
/// inotify cron daemon user tables implementation
/**
* \file usertable.cpp
*
* inotify cron system
*
* Copyright (C) 2006, 2007 Lukas Jelinek, <lukas@aiken.cz>
*
* This program is free software; you can use it, redistribute
* it and/or modify it under the terms of the GNU General Public
* License, version 2 (see LICENSE-GPL).
*
* Credits:
* David Santinoli (supplementary groups)
*
*/
#include <pwd.h>
#include <syslog.h>
#include <errno.h>
#include <sys/wait.h>
#include <unistd.h>
#include <grp.h>
#include <stdlib.h>
#include <sys/stat.h>
#include "usertable.h"
#include "incroncfg.h"
#ifdef IN_DONT_FOLLOW
#define DONT_FOLLOW(mask) InotifyEvent::IsType(mask, IN_DONT_FOLLOW)
#else // IN_DONT_FOLLOW
#define DONT_FOLLOW(mask) (false)
#endif // IN_DONT_FOLLOW
// this is not enough, but...
#define DEFAULT_PATH "/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin"
PROC_MAP UserTable::s_procMap;
extern volatile bool g_fFinish;
extern SUT_MAP g_ut;
void on_proc_done(InotifyWatch* pW)
{
pW->SetEnabled(true);
}
EventDispatcher::EventDispatcher(int iPipeFd, Inotify* pIn, InotifyWatch* pSys, InotifyWatch* pUser)
{
m_iPipeFd = iPipeFd;
m_iMgmtFd = pIn->GetDescriptor();
m_pIn = pIn;
m_pSys = pSys;
m_pUser = pUser;
m_size = 0;
m_pPoll = NULL;
}
EventDispatcher::~EventDispatcher()
{
if (m_pPoll != NULL)
delete[] m_pPoll;
}
bool EventDispatcher::ProcessEvents()
{
// consume pipe events if any (and report back)
bool pipe = (m_pPoll[0].revents & POLLIN);
if (pipe) {
char c;
while (read(m_pPoll[0].fd, &c, 1) > 0) {}
m_pPoll[0].revents = 0;
}
// process table management events if any
if (m_pPoll[1].revents & POLLIN) {
ProcessMgmtEvents();
m_pPoll[1].revents = 0;
}
InotifyEvent evt;
for (size_t i=2; i<m_size; i++) {
// process events if occurred
if (m_pPoll[i].revents & POLLIN) {
FDUT_MAP::iterator it = m_maps.find(m_pPoll[i].fd);
if (it != m_maps.end()) {
Inotify* pIn = ((*it).second)->GetInotify();
pIn->WaitForEvents(true);
// process events for this object
while (pIn->GetEvent(evt)) {
((*it).second)->OnEvent(evt);
}
}
m_pPoll[i].revents = 0;
}
}
return pipe;
}
void EventDispatcher::Register(UserTable* pTab)
{
if (pTab != NULL) {
Inotify* pIn = pTab->GetInotify();
if (pIn != NULL) {
int fd = pIn->GetDescriptor();
if (fd != -1) {
m_maps.insert(FDUT_MAP::value_type(fd, pTab));
Rebuild();
}
}
}
}
void EventDispatcher::Unregister(UserTable* pTab)
{
FDUT_MAP::iterator it = m_maps.find(pTab->GetInotify()->GetDescriptor());
if (it != m_maps.end()) {
m_maps.erase(it);
Rebuild();
}
}
void EventDispatcher::Rebuild()
{
// delete old data if exists
if (m_pPoll != NULL)
delete[] m_pPoll;
// allocate memory
m_size = m_maps.size() + 2;
m_pPoll = new struct pollfd[m_size];
// add pipe descriptor
m_pPoll[0].fd = m_iPipeFd;
m_pPoll[0].events = POLLIN;
m_pPoll[0].revents = 0;
// add table management descriptor
m_pPoll[1].fd = m_iMgmtFd;
m_pPoll[1].events = POLLIN;
m_pPoll[1].revents = 0;
// add all inotify descriptors
FDUT_MAP::iterator it = m_maps.begin();
for (size_t i=2; i<m_size; i++, it++) {
m_pPoll[i].fd = (*it).first;
m_pPoll[i].events = POLLIN;
m_pPoll[i].revents = 0;
}
}
void EventDispatcher::ProcessMgmtEvents()
{
m_pIn->WaitForEvents(true);
InotifyEvent e;
while (m_pIn->GetEvent(e)) {
if (e.GetWatch() == m_pSys) {
if (e.IsType(IN_DELETE_SELF) || e.IsType(IN_UNMOUNT)) {
syslog(LOG_CRIT, "base directory destroyed, exitting");
g_fFinish = true;
}
else if (!e.GetName().empty()) {
SUT_MAP::iterator it = g_ut.find(IncronCfg::BuildPath(m_pSys->GetPath(), e.GetName()));
if (it != g_ut.end()) {
UserTable* pUt = (*it).second;
if (e.IsType(IN_CLOSE_WRITE) || e.IsType(IN_MOVED_TO)) {
syslog(LOG_INFO, "system table %s changed, reloading", e.GetName().c_str());
pUt->Dispose();
pUt->Load();
}
else if (e.IsType(IN_MOVED_FROM) || e.IsType(IN_DELETE)) {
syslog(LOG_INFO, "system table %s destroyed, removing", e.GetName().c_str());
delete pUt;
g_ut.erase(it);
}
}
else if (e.IsType(IN_CLOSE_WRITE) || e.IsType(IN_MOVED_TO)) {
syslog(LOG_INFO, "system table %s created, loading", e.GetName().c_str());
UserTable* pUt = new UserTable(this, e.GetName(), true);
g_ut.insert(SUT_MAP::value_type(IncronTab::GetSystemTablePath(e.GetName()), pUt));
pUt->Load();
}
}
}
else if (e.GetWatch() == m_pUser) {
if (e.IsType(IN_DELETE_SELF) || e.IsType(IN_UNMOUNT)) {
syslog(LOG_CRIT, "base directory destroyed, exitting");
g_fFinish = true;
}
else if (!e.GetName().empty()) {
SUT_MAP::iterator it = g_ut.find(IncronCfg::BuildPath(m_pUser->GetPath(), e.GetName()));
if (it != g_ut.end()) {
UserTable* pUt = (*it).second;
if (e.IsType(IN_CLOSE_WRITE) || e.IsType(IN_MOVED_TO)) {
syslog(LOG_INFO, "table for user %s changed, reloading", e.GetName().c_str());
pUt->Dispose();
pUt->Load();
}
else if (e.IsType(IN_MOVED_FROM) || e.IsType(IN_DELETE)) {
syslog(LOG_INFO, "table for user %s destroyed, removing", e.GetName().c_str());
delete pUt;
g_ut.erase(it);
}
}
else if (e.IsType(IN_CLOSE_WRITE) || e.IsType(IN_MOVED_TO)) {
if (UserTable::CheckUser(e.GetName().c_str())) {
syslog(LOG_INFO, "table for user %s created, loading", e.GetName().c_str());
UserTable* pUt = new UserTable(this, e.GetName(), false);
g_ut.insert(SUT_MAP::value_type(IncronTab::GetUserTablePath(e.GetName()), pUt));
pUt->Load();
}
}
}
}
}
}
UserTable::UserTable(EventDispatcher* pEd, const std::string& rUser, bool fSysTable)
: m_user(rUser),
m_fSysTable(fSysTable)
{
m_pEd = pEd;
m_in.SetNonBlock(true);
m_in.SetCloseOnExec(true);
}
UserTable::~UserTable()
{
Dispose();
}
void UserTable::Load()
{
m_tab.Load(m_fSysTable
? IncronTab::GetSystemTablePath(m_user)
: IncronTab::GetUserTablePath(m_user));
int cnt = m_tab.GetCount();
for (int i=0; i<cnt; i++) {
IncronTabEntry& rE = m_tab.GetEntry(i);
InotifyWatch* pW = new InotifyWatch(rE.GetPath(), rE.GetMask());
// warning only - permissions may change later
if (!(m_fSysTable || MayAccess(rE.GetPath(), DONT_FOLLOW(rE.GetMask()))))
syslog(LOG_WARNING, "access denied on %s - events will be discarded silently", rE.GetPath().c_str());
try {
m_in.Add(pW);
m_map.insert(IWCE_MAP::value_type(pW, &rE));
} catch (InotifyException e) {
if (m_fSysTable)
syslog(LOG_ERR, "cannot create watch for system table %s: (%i) %s", m_user.c_str(), e.GetErrorNumber(), strerror(e.GetErrorNumber()));
else
syslog(LOG_ERR, "cannot create watch for user %s: (%i) %s", m_user.c_str(), e.GetErrorNumber(), strerror(e.GetErrorNumber()));
delete pW;
}
}
m_pEd->Register(this);
}
void UserTable::Dispose()
{
m_pEd->Unregister(this);
IWCE_MAP::iterator it = m_map.begin();
while (it != m_map.end()) {
InotifyWatch* pW = (*it).first;
m_in.Remove(pW);
PROC_MAP::iterator it2 = s_procMap.begin();
while (it2 != s_procMap.end()) {
if ((*it2).second.pWatch == pW) {
PROC_MAP::iterator it3 = it2;
it2++;
s_procMap.erase(it3);
}
else {
it2++;
}
}
delete pW;
it++;
}
m_map.clear();
}
void UserTable::OnEvent(InotifyEvent& rEvt)
{
InotifyWatch* pW = rEvt.GetWatch();
IncronTabEntry* pE = FindEntry(pW);
// no entry found - this shouldn't occur
if (pE == NULL)
return;
// discard event if user has no access rights to watch path
if (!(m_fSysTable || MayAccess(pW->GetPath(), DONT_FOLLOW(rEvt.GetMask()))))
return;
std::string cmd;
const std::string& cs = pE->GetCmd();
size_t pos = 0;
size_t oldpos = 0;
size_t len = cs.length();
while ((pos = cs.find('$', oldpos)) != std::string::npos) {
if (pos < len - 1) {
size_t px = pos + 1;
if (cs[px] == '$') {
cmd.append(cs.substr(oldpos, pos-oldpos+1));
oldpos = pos + 2;
}
else {
cmd.append(cs.substr(oldpos, pos-oldpos));
if (cs[px] == '@') { // base path
cmd.append(pW->GetPath());
oldpos = pos + 2;
}
else if (cs[px] == '#') { // file name
cmd.append(rEvt.GetName());
oldpos = pos + 2;
}
else if (cs[px] == '%') { // mask symbols
std::string s;
rEvt.DumpTypes(s);
cmd.append(s);
oldpos = pos + 2;
}
else if (cs[px] == '&') { // numeric mask
char* s;
asprintf(&s, "%u", (unsigned) rEvt.GetMask());
cmd.append(s);
free(s);
oldpos = pos + 2;
}
else {
oldpos = pos + 1;
}
}
}
else {
cmd.append(cs.substr(oldpos, pos-oldpos));
oldpos = pos + 1;
}
}
cmd.append(cs.substr(oldpos));
int argc;
char** argv;
if (!PrepareArgs(cmd, argc, argv)) {
syslog(LOG_ERR, "cannot prepare command arguments");
return;
}
if (m_fSysTable)
syslog(LOG_INFO, "(system::%s) CMD (%s)", m_user.c_str(), cmd.c_str());
else
syslog(LOG_INFO, "(%s) CMD (%s)", m_user.c_str(), cmd.c_str());
if (pE->IsNoLoop())
pW->SetEnabled(false);
pid_t pid = fork();
if (pid == 0) {
// for system table
if (m_fSysTable) {
if (execvp(argv[0], argv) != 0) // exec failed
{
syslog(LOG_ERR, "cannot exec process: %s", strerror(errno));
_exit(1);
}
}
else {
// for user table
RunAsUser(argv);
}
}
else if (pid > 0) {
ProcData_t pd;
if (pE->IsNoLoop()) {
pd.onDone = on_proc_done;
pd.pWatch = pW;
}
else {
pd.onDone = NULL;
pd.pWatch = NULL;
}
s_procMap.insert(PROC_MAP::value_type(pid, pd));
}
else {
if (pE->IsNoLoop())
pW->SetEnabled(true);
syslog(LOG_ERR, "cannot fork process: %s", strerror(errno));
}
CleanupArgs(argc, argv);
}
IncronTabEntry* UserTable::FindEntry(InotifyWatch* pWatch)
{
IWCE_MAP::iterator it = m_map.find(pWatch);
if (it == m_map.end())
return NULL;
return (*it).second;
}
bool UserTable::PrepareArgs(const std::string& rCmd, int& argc, char**& argv)
{
if (rCmd.empty())
return false;
StringTokenizer tok(rCmd, ' ', '\\');
std::deque<std::string> args;
while (tok.HasMoreTokens()) {
args.push_back(tok.GetNextToken());
}
if (args.empty())
return false;
argc = (int) args.size();
argv = new char*[argc+1];
argv[argc] = NULL;
for (int i=0; i<argc; i++) {
const std::string& s = args[i];
size_t len = s.length();
argv[i] = new char[len+1];
strcpy(argv[i], s.c_str());
}
return true;
}
void UserTable::CleanupArgs(int argc, char** argv)
{
for (int i=0; i<argc; i++) {
delete[] argv[i];
}
delete[] argv;
}
void UserTable::FinishDone()
{
pid_t res = 0;
int status = 0;
while ((res = waitpid(-1, &status, WNOHANG)) > 0) {
PROC_MAP::iterator it = s_procMap.find(res);
if (it != s_procMap.end()) {
ProcData_t pd = (*it).second;
if (pd.onDone != NULL)
(*pd.onDone)(pd.pWatch);
s_procMap.erase(it);
}
}
}
bool UserTable::MayAccess(const std::string& rPath, bool fNoFollow) const
{
// first, retrieve file permissions
struct stat st;
int res = fNoFollow
? lstat(rPath.c_str(), &st) // don't follow symlink
: stat(rPath.c_str(), &st);
if (res != 0)
return false; // retrieving permissions failed
// file accessible to everyone
if (st.st_mode & S_IRWXO)
return true;
// retrieve user data
struct passwd* pwd = getpwnam(m_user.c_str());
// root may always access
if (pwd->pw_uid == 0)
return true;
// file accesible to group
if (st.st_mode & S_IRWXG) {
// user's primary group
if (pwd != NULL && pwd->pw_gid == st.st_gid)
return true;
// now check group database
struct group *gr = getgrgid(st.st_gid);
if (gr != NULL) {
int pos = 0;
const char* un;
while ((un = gr->gr_mem[pos]) != NULL) {
if (strcmp(un, m_user.c_str()) == 0)
return true;
pos++;
}
}
}
// file accessible to owner
if (st.st_mode & S_IRWXU) {
if (pwd != NULL && pwd->pw_uid == st.st_uid)
return true;
}
return false; // no access right found
}
void UserTable::RunAsUser(char* const* argv) const
{
struct passwd* pwd = getpwnam(m_user.c_str());
if ( pwd == NULL // check query result
|| setgid(pwd->pw_gid) != 0 // check GID
|| initgroups(m_user.c_str(),pwd->pw_gid) != 0 // check supplementary groups
|| setuid(pwd->pw_uid) != 0) // check UID
{
goto failed;
}
if (pwd->pw_uid != 0) {
if (clearenv() != 0)
goto failed;
if ( setenv("LOGNAME", pwd->pw_name, 1) != 0
|| setenv("USER", pwd->pw_name, 1) != 0
|| setenv("USERNAME", pwd->pw_name, 1) != 0
|| setenv("HOME", pwd->pw_dir, 1) != 0
|| setenv("SHELL", pwd->pw_shell, 1) != 0
|| setenv("PATH", DEFAULT_PATH, 1) != 0)
{
goto failed;
}
}
execvp(argv[0], argv); // this may return only on failure
failed:
syslog(LOG_ERR, "cannot exec process: %s", strerror(errno));
_exit(1);
}

/incron/tags/incron-0.5.7/incron.h
0,0 → 1,39
/// inotify cron basic definition file
/**
* \file incron.h
*
* inotify cron system
*
* Copyright (C) 2006, 2007 Lukas Jelinek, <lukas@aiken.cz>
*
* This program is free software; you can use it, redistribute
* it and/or modify it under the terms of the GNU General Public
* License, version 2 (see LICENSE-GPL).
*
*/
#ifndef _INCRON_H_
#define _INCRON_H_
/// Common application name
#define INCRON_NAME "incron"
/// Daemon name
#define INCROND_NAME "incrond"
/// Table manipulator name
#define INCRONTAB_NAME "incrontab"
/// Application version (release)
#define INCRON_VERSION "0.5.7"
/// Address for sending bugs
#define INCRON_BUG_ADDRESS "<bugs@aiken.cz>"
/// Default configuration file
#define INCRON_CONFIG "/etc/incron.conf"
#endif //_INCRON_H_

/incron/tags/incron-0.5.7/incrond.8
0,0 → 1,37
.TH "incrond" "8" "0.5.6" "Lukas Jelinek" "incron documentation"
.SH "NAME"
incrond \- inotify cron (incron) daemon
.SH "SYNOPSIS"
\fBincrond\fR [ \-f \fIfile\fR ] [ \-n | \-k ]
.SH "DESCRIPTION"
The inotify cron daemon (\fIincrond\fR) is a daemon which monitors filesystem events and executes commands defined in system and user tables. It's use is generally similar to \fIcron\fR(8).
\fIincrond\fR can be started from /etc/rc, /etc/rc.local and so on. It daemonizes itself (returns immediately) and doesn't need to be started with & and through \fInohup\fR(1). It can be run on foreground too.
\fIincrond\fR uses two categories of tables \fIincrontab\fR(5). System tables are usually located in /etc/incron.d and are maintained outside of incron (e.g. by various applications). These tables work on root rights level and thus any file may be watched and commands are executed with root privileges.
User tables are located in /var/spool/incron by default and have names based on user accounts. These tables use users' access rights, thus only files which the user may access are watched. Commands are executed with users' privileges.
If a table (incrontab) is changed \fIincrond\fR reacts immediately and reloads the table. Currently running child processes (commands) are not affected.
There are two files determining whether an user is allowed to use incron. These files have very simple syntax \- one user name per line. If /etc/incron.allow exists the user must be noted there to be allowed to use incron. Otherwise if /etc/incron.deny exists the user must not be noted there to use incron. If none of these files exists there is no other restriction whether anybody may use incron. Location of these files can be changed in the configuration.
The daemon itself is currently not protected against looping. If a command executed due to an event causes the same event it leads to an infinite loop unless a flag mask containing IN_NO_LOOP is specified. Please beware of this and do not allow permission for use incron to unreliable users.
\fB\-n\fR (or \fB\-\-foreground\fR) option causes running on foreground. This is useful especially for testing, debugging and optimization.
\fB\-k\fR (or \fB\-\-kill\fR) option terminates a running instance of \fBincrond\fR.
\fB\-f <FILE>\fR (or \fB\-\-config=<FILE>\fR) option specifies another location for the configuration file (/etc/incron.conf is used by default).
\fBEnvironment variables:\fR For system tables, the default (the same as for incrond itself) environment variable set is used. The same applies to root's table. For non\-root user tables, the whole environment is cleared and then only these variables are set: LOGNAME, USER, USERNAME, SHELL, HOME and PATH. The variables (except PATH) take values from the user database (e.g. /etc/passwd). The PATH variable is set to /usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin.
.SH "SEE ALSO"
incrontab(1), incrontab(5), incron.conf(5)
.SH "BUGS"
incrond is currently not resistent against looping. Recursive monitoring (whole subtrees) has not been implemented yet.
.SH "AUTHOR"
Lukas Jelinek <lukas@aiken.cz>
.SH "COPYING"
This program is free software. It can be used, redistributed and/or modified under the terms of the GNU General Public License, version 2.

/incron/tags/incron-0.5.7/inotify-cxx.h
0,0 → 1,889
/// inotify C++ interface header
/**
* \file inotify-cxx.h
*
* inotify C++ interface
*
* Copyright (C) 2006, 2007 Lukas Jelinek, <lukas@aiken.cz>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of one of the following licenses:
*
* \li 1. X11-style license (see LICENSE-X11)
* \li 2. GNU Lesser General Public License, version 2.1 (see LICENSE-LGPL)
* \li 3. GNU General Public License, version 2 (see LICENSE-GPL)
*
* If you want to help with choosing the best license for you,
* please visit http://www.gnu.org/licenses/license-list.html.
*
*/
#ifndef _INOTIFYCXX_H_
#define _INOTIFYCXX_H_
#include <stdint.h>
#include <string>
#include <deque>
#include <map>
// Please ensure that the following headers take the right place
#include <sys/syscall.h>
#include <sys/inotify.h>
// Use this if syscalls not defined
#ifndef __NR_inotify_init
#include <sys/inotify-syscalls.h>
#endif // __NR_inotify_init
/// Event struct size
#define INOTIFY_EVENT_SIZE (sizeof(struct inotify_event))
/// Event buffer length
#define INOTIFY_BUFLEN (1024 * (INOTIFY_EVENT_SIZE + 16))
/// Helper macro for creating exception messages.
/**
* It prepends the message by the function name.
*/
#define IN_EXC_MSG(msg) (std::string(__PRETTY_FUNCTION__) + ": " + msg)
/// inotify capability/limit identifiers
typedef enum
{
IN_MAX_EVENTS = 0, ///< max. events in the kernel queue
IN_MAX_INSTANCES = 1, ///< max. inotify file descriptors per process
IN_MAX_WATCHES = 2 ///< max. watches per file descriptor
} InotifyCapability_t;
/// inotify-cxx thread safety
/**
* If this symbol is defined you can use this interface safely
* threaded applications. Remember that it slightly degrades
* performance.
*
* Even if INOTIFY_THREAD_SAFE is defined some classes stay
* unsafe. If you must use them (must you?) in more than one
* thread concurrently you need to implement explicite locking.
*
* You need not to define INOTIFY_THREAD_SAFE in that cases
* where the application is multithreaded but all the inotify
* infrastructure will be managed only in one thread. This is
* the recommended way.
*
* Locking may fail (it is very rare but not impossible). In this
* case an exception is thrown. But if unlocking fails in case
* of an error it does nothing (this failure is ignored).
*/
#ifdef INOTIFY_THREAD_SAFE
#include <pthread.h>
#define IN_LOCK_DECL mutable pthread_rwlock_t __m_lock;
#define IN_LOCK_INIT \
{ \
pthread_rwlockattr_t attr; \
int res = 0; \
if ((res = pthread_rwlockattr_init(&attr)) != 0) \
throw InotifyException(IN_EXC_MSG("cannot initialize lock attributes"), res, this); \
if ((res = pthread_rwlockattr_setkind_np(&attr, PTHREAD_RWLOCK_PREFER_WRITER_NP)) != 0) \
throw InotifyException(IN_EXC_MSG("cannot set lock kind"), res, this); \
if ((res = pthread_rwlock_init(&__m_lock, &attr)) != 0) \
throw InotifyException(IN_EXC_MSG("cannot initialize lock"), res, this); \
pthread_rwlockattr_destroy(&attr); \
}
#define IN_LOCK_DONE pthread_rwlock_destroy(&__m_lock);
#define IN_READ_BEGIN \
{ \
int res = pthread_rwlock_rdlock(&__m_lock); \
if (res != 0) \
throw InotifyException(IN_EXC_MSG("locking for reading failed"), res, (void*) this); \
}
#define IN_READ_END \
{ \
int res = pthread_rwlock_unlock(&__m_lock); \
if (res != 0) \
throw InotifyException(IN_EXC_MSG("unlocking failed"), res, (void*) this); \
}
#define IN_READ_END_NOTHROW pthread_rwlock_unlock(&__m_lock);
#define IN_WRITE_BEGIN \
{ \
int res = pthread_rwlock_wrlock(&__m_lock); \
if (res != 0) \
throw InotifyException(IN_EXC_MSG("locking for writing failed"), res, (void*) this); \
}
#define IN_WRITE_END IN_READ_END
#define IN_WRITE_END_NOTHROW IN_READ_END_NOTHROW
#else // INOTIFY_THREAD_SAFE
#define IN_LOCK_DECL
#define IN_LOCK_INIT
#define IN_LOCK_DONE
#define IN_READ_BEGIN
#define IN_READ_END
#define IN_READ_END_NOTHROW
#define IN_WRITE_BEGIN
#define IN_WRITE_END
#define IN_WRITE_END_NOTHROW
#endif // INOTIFY_THREAD_SAFE
// forward declaration
class InotifyWatch;
class Inotify;
/// Class for inotify exceptions
/**
* This class allows to acquire information about exceptional
* events. It makes easier to log or display error messages
* and to identify problematic code locations.
*
* Although this class is basically thread-safe it is not intended
* to be shared between threads.
*/
class InotifyException
{
public:
/// Constructor
/**
* \param[in] rMsg message
* \param[in] iErr error number (see errno.h)
* \param[in] pSrc source
*/
InotifyException(const std::string& rMsg = "", int iErr = 0, void* pSrc = NULL)
: m_msg(rMsg),
m_err(iErr)
{
m_pSrc = pSrc;
}
/// Returns the exception message.
/**
* \return message
*/
inline const std::string& GetMessage() const
{
return m_msg;
}
/// Returns the exception error number.
/**
* If not applicable this value is 0 (zero).
*
* \return error number (standardized; see errno.h)
*/
inline int GetErrorNumber() const
{
return m_err;
}
/// Returns the exception source.
/**
* \return source
*/
inline void* GetSource() const
{
return m_pSrc;
}
protected:
std::string m_msg; ///< message
int m_err; ///< error number
mutable void* m_pSrc; ///< source
};
/// inotify event class
/**
* It holds all information about inotify event and provides
* access to its particular values.
*
* This class is not (and is not intended to be) thread-safe
* and therefore it must not be used concurrently in multiple
* threads.
*/
class InotifyEvent
{
public:
/// Constructor.
/**
* Creates a plain event.
*/
InotifyEvent()
: m_uMask(0),
m_uCookie(0)
{
m_pWatch = NULL;
}
/// Constructor.
/**
* Creates an event based on inotify event data.
* For NULL pointers it works the same way as InotifyEvent().
*
* \param[in] pEvt event data
* \param[in] pWatch inotify watch
*/
InotifyEvent(const struct inotify_event* pEvt, InotifyWatch* pWatch)
: m_uMask(0),
m_uCookie(0)
{
if (pEvt != NULL) {
m_uMask = (uint32_t) pEvt->mask;
m_uCookie = (uint32_t) pEvt->cookie;
if (pEvt->name != NULL) {
m_name = pEvt->len > 0
? pEvt->name
: "";
}
m_pWatch = pWatch;
}
else {
m_pWatch = NULL;
}
}
/// Destructor.
~InotifyEvent() {}
/// Returns the event watch descriptor.
/**
* \return watch descriptor
*
* \sa InotifyWatch::GetDescriptor()
*/
int32_t GetDescriptor() const;
/// Returns the event mask.
/**
* \return event mask
*
* \sa InotifyWatch::GetMask()
*/
inline uint32_t GetMask() const
{
return m_uMask;
}
/// Checks a value for the event type.
/**
* \param[in] uValue checked value
* \param[in] uType type which is checked for
* \return true = the value contains the given type, false = otherwise
*/
inline static bool IsType(uint32_t uValue, uint32_t uType)
{
return ((uValue & uType) != 0) && ((~uValue & uType) == 0);
}
/// Checks for the event type.
/**
* \param[in] uType type which is checked for
* \return true = event mask contains the given type, false = otherwise
*/
inline bool IsType(uint32_t uType) const
{
return IsType(m_uMask, uType);
}
/// Returns the event cookie.
/**
* \return event cookie
*/
inline uint32_t GetCookie() const
{
return m_uCookie;
}
/// Returns the event name length.
/**
* \return event name length
*/
inline uint32_t GetLength() const
{
return (uint32_t) m_name.length();
}
/// Returns the event name.
/**
* \return event name
*/
inline const std::string& GetName() const
{
return m_name;
}
/// Extracts the event name.
/**
* \param[out] rName event name
*/
inline void GetName(std::string& rName) const
{
rName = GetName();
}
/// Returns the source watch.
/**
* \return source watch
*/
inline InotifyWatch* GetWatch()
{
return m_pWatch;
}
/// Finds the appropriate mask for a name.
/**
* \param[in] rName mask name
* \return mask for name; 0 on failure
*/
static uint32_t GetMaskByName(const std::string& rName);
/// Fills the string with all types contained in an event mask value.
/**
* \param[in] uValue event mask value
* \param[out] rStr dumped event types
*/
static void DumpTypes(uint32_t uValue, std::string& rStr);
/// Fills the string with all types contained in the event mask.
/**
* \param[out] rStr dumped event types
*/
void DumpTypes(std::string& rStr) const;
private:
uint32_t m_uMask; ///< mask
uint32_t m_uCookie; ///< cookie
std::string m_name; ///< name
InotifyWatch* m_pWatch; ///< source watch
};
/// inotify watch class
/**
* It holds information about the inotify watch on a particular
* inode.
*
* If the INOTIFY_THREAD_SAFE is defined this class is thread-safe.
*/
class InotifyWatch
{
public:
/// Constructor.
/**
* Creates an inotify watch. Because this watch is
* inactive it has an invalid descriptor (-1).
*
* \param[in] rPath watched file path
* \param[in] uMask mask for events
* \param[in] fEnabled events enabled yes/no
*/
InotifyWatch(const std::string& rPath, int32_t uMask, bool fEnabled = true)
: m_path(rPath),
m_uMask(uMask),
m_wd((int32_t) -1),
m_fEnabled(fEnabled)
{
IN_LOCK_INIT
}
/// Destructor.
~InotifyWatch()
{
IN_LOCK_DONE
}
/// Returns the watch descriptor.
/**
* \return watch descriptor; -1 for inactive watch
*/
inline int32_t GetDescriptor() const
{
return m_wd;
}
/// Returns the watched file path.
/**
* \return file path
*/
inline const std::string& GetPath() const
{
return m_path;
}
/// Returns the watch event mask.
/**
* \return event mask
*/
inline uint32_t GetMask() const
{
return (uint32_t) m_uMask;
}
/// Sets the watch event mask.
/**
* If the watch is active (added to an instance of Inotify)
* this method may fail due to unsuccessful re-setting
* the watch in the kernel.
*
* \param[in] uMask event mask
*
* \throw InotifyException thrown if changing fails
*/
void SetMask(uint32_t uMask) throw (InotifyException);
/// Returns the appropriate inotify class instance.
/**
* \return inotify instance
*/
inline Inotify* GetInotify()
{
return m_pInotify;
}
/// Enables/disables the watch.
/**
* If the watch is active (added to an instance of Inotify)
* this method may fail due to unsuccessful re-setting
* the watch in the kernel.
*
* Re-setting the current state has no effect.
*
* \param[in] fEnabled set enabled yes/no
*
* \throw InotifyException thrown if enabling/disabling fails
*/
void SetEnabled(bool fEnabled) throw (InotifyException);
/// Checks whether the watch is enabled.
/**
* \return true = enables, false = disabled
*/
inline bool IsEnabled() const
{
return m_fEnabled;
}
/// Checks whether the watch is recursive.
/**
* A recursive watch monitors a directory itself and all
* its subdirectories. This watch is a logical object
* which may have many underlying kernel watches.
*
* \return currently always false (recursive watches not yet supported)
* \attention Recursive watches are currently NOT supported.
* They are planned for future versions.
*/
inline bool IsRecursive() const
{
return false;
}
private:
friend class Inotify;
std::string m_path; ///< watched file path
uint32_t m_uMask; ///< event mask
int32_t m_wd; ///< watch descriptor
Inotify* m_pInotify; ///< inotify object
bool m_fEnabled; ///< events enabled yes/no
IN_LOCK_DECL
/// Disables the watch (due to removing by the kernel).
/**
* This method must be called after receiving an event.
* It ensures the watch object is consistent with the kernel
* data.
*/
void __Disable();
};
/// Mapping from watch descriptors to watch objects.
typedef std::map<int32_t, InotifyWatch*> IN_WATCH_MAP;
/// Mapping from paths to watch objects.
typedef std::map<std::string, InotifyWatch*> IN_WP_MAP;
/// inotify class
/**
* It holds information about the inotify device descriptor
* and manages the event queue.
*
* If the INOTIFY_THREAD_SAFE is defined this class is thread-safe.
*/
class Inotify
{
public:
/// Constructor.
/**
* Creates and initializes an instance of inotify communication
* object (opens the inotify device).
*
* \throw InotifyException thrown if inotify isn't available
*/
Inotify() throw (InotifyException);
/// Destructor.
/**
* Calls Close() due to clean-up.
*/
~Inotify();
/// Removes all watches and closes the inotify device.
void Close();
/// Adds a new watch.
/**
* \param[in] pWatch inotify watch
*
* \throw InotifyException thrown if adding failed
*/
void Add(InotifyWatch* pWatch) throw (InotifyException);
/// Adds a new watch.
/**
* \param[in] rWatch inotify watch
*
* \throw InotifyException thrown if adding failed
*/
inline void Add(InotifyWatch& rWatch) throw (InotifyException)
{
Add(&rWatch);
}
/// Removes a watch.
/**
* If the given watch is not present it does nothing.
*
* \param[in] pWatch inotify watch
*
* \throw InotifyException thrown if removing failed
*/
void Remove(InotifyWatch* pWatch) throw (InotifyException);
/// Removes a watch.
/**
* If the given watch is not present it does nothing.
*
* \param[in] rWatch inotify watch
*
* \throw InotifyException thrown if removing failed
*/
inline void Remove(InotifyWatch& rWatch) throw (InotifyException)
{
Remove(&rWatch);
}
/// Removes all watches.
void RemoveAll();
/// Returns the count of watches.
/**
* This is the total count of all watches (regardless whether
* enabled or not).
*
* \return count of watches
*
* \sa GetEnabledCount()
*/
inline size_t GetWatchCount() const
{
IN_READ_BEGIN
size_t n = (size_t) m_paths.size();
IN_READ_END
return n;
}
/// Returns the count of enabled watches.
/**
* \return count of enabled watches
*
* \sa GetWatchCount()
*/
inline size_t GetEnabledCount() const
{
IN_READ_BEGIN
size_t n = (size_t) m_watches.size();
IN_READ_END
return n;
}
/// Waits for inotify events.
/**
* It waits until one or more events occur. When called
* in nonblocking mode it only retrieves occurred events
* to the internal queue and exits.
*
* \param[in] fNoIntr if true it re-calls the system call after a handled signal
*
* \throw InotifyException thrown if reading events failed
*
* \sa SetNonBlock()
*/
void WaitForEvents(bool fNoIntr = false) throw (InotifyException);
/// Returns the count of received and queued events.
/**
* This number is related to the events in the queue inside
* this object, not to the events pending in the kernel.
*
* \return count of events
*/
inline size_t GetEventCount()
{
IN_READ_BEGIN
size_t n = (size_t) m_events.size();
IN_READ_END
return n;
}
/// Extracts a queued inotify event.
/**
* The extracted event is removed from the queue.
* If the pointer is NULL it does nothing.
*
* \param[in,out] pEvt event object
*
* \throw InotifyException thrown if the provided pointer is NULL
*/
bool GetEvent(InotifyEvent* pEvt) throw (InotifyException);
/// Extracts a queued inotify event.
/**
* The extracted event is removed from the queue.
*
* \param[in,out] rEvt event object
*
* \throw InotifyException thrown only in very anomalous cases
*/
bool GetEvent(InotifyEvent& rEvt) throw (InotifyException)
{
return GetEvent(&rEvt);
}
/// Extracts a queued inotify event (without removing).
/**
* The extracted event stays in the queue.
* If the pointer is NULL it does nothing.
*
* \param[in,out] pEvt event object
*
* \throw InotifyException thrown if the provided pointer is NULL
*/
bool PeekEvent(InotifyEvent* pEvt) throw (InotifyException);
/// Extracts a queued inotify event (without removing).
/**
* The extracted event stays in the queue.
*
* \param[in,out] rEvt event object
*
* \throw InotifyException thrown only in very anomalous cases
*/
bool PeekEvent(InotifyEvent& rEvt) throw (InotifyException)
{
return PeekEvent(&rEvt);
}
/// Searches for a watch by a watch descriptor.
/**
* It tries to find a watch by the given descriptor.
*
* \param[in] iDescriptor watch descriptor
* \return pointer to a watch; NULL if no such watch exists
*/
InotifyWatch* FindWatch(int iDescriptor);
/// Searches for a watch by a filesystem path.
/**
* It tries to find a watch by the given filesystem path.
*
* \param[in] rPath filesystem path
* \return pointer to a watch; NULL if no such watch exists
*
* \attention The path must be exactly identical to the one
* used for the searched watch. Be careful about
* absolute/relative and case-insensitive paths.
*/
InotifyWatch* FindWatch(const std::string& rPath);
/// Returns the file descriptor.
/**
* The descriptor can be used in standard low-level file
* functions (poll(), select(), fcntl() etc.).
*
* \return valid file descriptor or -1 for inactive object
*
* \sa SetNonBlock()
*/
inline int GetDescriptor() const
{
return m_fd;
}
/// Enables/disables non-blocking mode.
/**
* Use this mode if you want to monitor the descriptor
* (acquired thru GetDescriptor()) in functions such as
* poll(), select() etc.
*
* Non-blocking mode is disabled by default.
*
* \param[in] fNonBlock enable/disable non-blocking mode
*
* \throw InotifyException thrown if setting mode failed
*
* \sa GetDescriptor(), SetCloseOnExec()
*/
void SetNonBlock(bool fNonBlock) throw (InotifyException);
/// Enables/disables closing on exec.
/**
* Enable this if you want to close the descriptor when
* executing another program. Otherwise, the descriptor
* will be inherited.
*
* Closing on exec is disabled by default.
*
* \param[in] fClOnEx enable/disable closing on exec
*
* \throw InotifyException thrown if setting failed
*
* \sa GetDescriptor(), SetNonBlock()
*/
void SetCloseOnExec(bool fClOnEx) throw (InotifyException);
/// Acquires a particular inotify capability/limit.
/**
* \param[in] cap capability/limit identifier
* \return capability/limit value
* \throw InotifyException thrown if the given value cannot be acquired
*/
static uint32_t GetCapability(InotifyCapability_t cap) throw (InotifyException);
/// Modifies a particular inotify capability/limit.
/**
* \param[in] cap capability/limit identifier
* \param[in] val new capability/limit value
* \throw InotifyException thrown if the given value cannot be set
* \attention Using this function requires root privileges.
* Beware of setting extensive values - it may seriously
* affect system performance and/or stability.
*/
static void SetCapability(InotifyCapability_t cap, uint32_t val) throw (InotifyException);
/// Returns the maximum number of events in the kernel queue.
/**
* \return maximum number of events in the kernel queue
* \throw InotifyException thrown if the given value cannot be acquired
*/
inline static uint32_t GetMaxEvents() throw (InotifyException)
{
return GetCapability(IN_MAX_EVENTS);
}
/// Sets the maximum number of events in the kernel queue.
/**
* \param[in] val new value
* \throw InotifyException thrown if the given value cannot be set
* \attention Using this function requires root privileges.
* Beware of setting extensive values - the greater value
* is set here the more physical memory may be used for the inotify
* infrastructure.
*/
inline static void SetMaxEvents(uint32_t val) throw (InotifyException)
{
SetCapability(IN_MAX_EVENTS, val);
}
/// Returns the maximum number of inotify instances per process.
/**
* It means the maximum number of open inotify file descriptors
* per running process.
*
* \return maximum number of inotify instances
* \throw InotifyException thrown if the given value cannot be acquired
*/
inline static uint32_t GetMaxInstances() throw (InotifyException)
{
return GetCapability(IN_MAX_INSTANCES);
}
/// Sets the maximum number of inotify instances per process.
/**
* \param[in] val new value
* \throw InotifyException thrown if the given value cannot be set
* \attention Using this function requires root privileges.
* Beware of setting extensive values - the greater value
* is set here the more physical memory may be used for the inotify
* infrastructure.
*/
inline static void SetMaxInstances(uint32_t val) throw (InotifyException)
{
SetCapability(IN_MAX_INSTANCES, val);
}
/// Returns the maximum number of inotify watches per instance.
/**
* It means the maximum number of inotify watches per inotify
* file descriptor.
*
* \return maximum number of inotify watches
* \throw InotifyException thrown if the given value cannot be acquired
*/
inline static uint32_t GetMaxWatches() throw (InotifyException)
{
return GetCapability(IN_MAX_WATCHES);
}
/// Sets the maximum number of inotify watches per instance.
/**
* \param[in] val new value
* \throw InotifyException thrown if the given value cannot be set
* \attention Using this function requires root privileges.
* Beware of setting extensive values - the greater value
* is set here the more physical memory may be used for the inotify
* infrastructure.
*/
inline static void SetMaxWatches(uint32_t val) throw (InotifyException)
{
SetCapability(IN_MAX_WATCHES, val);
}
private:
int m_fd; ///< file descriptor
IN_WATCH_MAP m_watches; ///< watches (by descriptors)
IN_WP_MAP m_paths; ///< watches (by paths)
unsigned char m_buf[INOTIFY_BUFLEN]; ///< buffer for events
std::deque<InotifyEvent> m_events; ///< event queue
IN_LOCK_DECL
friend class InotifyWatch;
static std::string GetCapabilityPath(InotifyCapability_t cap) throw (InotifyException);
};
#endif //_INOTIFYCXX_H_

/incron/tags/incron-0.5.7/incrontab.1
0,0 → 1,53
.TH "incrontab" "1" "0.5.6" "Lukas Jelinek" "incron documentation"
.SH "NAME"
incrontab \- table manipulator for inotify cron (incron)
.SH "SYNOPSIS"
\fBincrontab\fR [\fB\-u\fR \fIuser\fR] [\fB\-f\fR \fIconfig\fR] \fIfile\fR
\fBincrontab\fR [\fB\-u\fR \fIuser\fR] [\fB\-f\fR \fIconfig\fR] [\fB\-l\fR | \fB\-r\fR | \fB\-e\fR | \fB\-t\fR | \fB\-d\fR]
.SH "DESCRIPTION"
incrontab is a table manipulator for the inotify cron (incron) system. It creates, removes, modifies and lists user tables (\fIincrontab\fR(5)).
Each user (including system users even they haven't home directories) has an incron table which can't be manipulated directly (only root can effectively change these tables and is NOT recommended to do so).
All informational messages of this program are printed to the standard error output (stderr).
If \fI/etc/incron.allow\fR exists only users listed here may use incron. Otherwise if \fI/etc/incron.deny\fR exists only users NOT listed here may use incron. If none of these files exists everyone is allowed to use incron. (\fBImportant note:\fR This behavior is insecure and will be probably changed to be compatible with the style used by ISC Cron.) Location of these files can be changed in the configuration.
The first form of this command imports a file, validates it and stores to the table. "\-" can be used for loading from the standard input.
\fB\-u\fR (or \fB\-\-user\fR) option overrides the current (real) user to the given one. This option is intended for manipulation with system users' tables (such as apache, postfix, daemon etc.). It can be used only if the current user has root's effective rights.
\fB\-l\fR (or \fB\-\-list\fR) option causes the current table is printed to the standard output.
\fB\-r\fR (or \fB\-\-remove\fR) option causes the current table (if any) is permanently remove without any warning or confirmation. Use with caution!
\fB\-e\fR (or \fB\-\-edit\fR) option causes executing an editor for editting the user table (see below for the information about editor selection). You can edit your incron table now. If the table is changed it stores the modified version.
\fB\-t\fR (or \fB\-\-types\fR) option causes the list of supported event types (delimited by commas) is printed to the standard output. This feature is intended for front\-end applications to find out which event types was compiled in.
\fB\-d\fR (or \fB\-\-reload\fR) option causes reloading the current table by \fIincrond\fR(8). It is done through "touching" the table (writing into it without modifying it). This feature is intended e.g. for creating watches on newly created files (with already existing rules) or for rearming IN_ONESHOT watches.
\fB\-f <FILE>\fR (or \fB\-\-config=<FILE>\fR) option specifies another location for the configuration file (/etc/incron.conf is used by default). This feature requires root privileges.
There is a few complex algorithm how to determine which editor will be user for editting. If any of the following rule succeeds the appropriate editor is used:
1. EDITOR environment variable
2. VISUAL environment variable
3. configuration value
4. etc/alternatives/editor
5. hard\-wired editor (\fIvim\fR by default)
It's not recommended to use graphical editors (such as gVim, KEdit etc.) due to possible problems with connecting to the X server.
.SH "SEE ALSO"
incrond(8), incrontab(5), incron.conf(5)
.SH "AUTHOR"
Lukas Jelinek <lukas@aiken.cz>
.SH "COPYING"
This program is free software. It can be used, redistributed and/or modified under the terms of the GNU General Public License, version 2.

/incron/tags/incron-0.5.7/icd-main.cpp
0,0 → 1,470
/// inotify cron daemon main file
/**
* \file icd-main.cpp
*
* inotify cron system
*
* Copyright (C) 2006, 2007 Lukas Jelinek, <lukas@aiken.cz>
*
* This program is free software; you can use it, redistribute
* it and/or modify it under the terms of the GNU General Public
* License, version 2 (see LICENSE-GPL).
*
*/
#include <map>
#include <signal.h>
#include <wait.h>
#include <fcntl.h>
#include <pwd.h>
#include <dirent.h>
#include <syslog.h>
#include <errno.h>
#include <sys/poll.h>
#include <sys/stat.h>
#include "inotify-cxx.h"
#include "appinst.h"
#include "appargs.h"
#include "incron.h"
#include "incrontab.h"
#include "usertable.h"
#include "incroncfg.h"
/// Logging options (console as fallback, log PID)
#define INCRON_LOG_OPTS (LOG_CONS | LOG_PID)
/// Logging facility (use CRON)
#define INCRON_LOG_FACIL LOG_CRON
/// incrond version string
#define INCROND_VERSION INCROND_NAME " " INCRON_VERSION
/// incrontab description string
#define INCROND_DESCRIPTION "incrond - inotify cron daemon\n" \
"(c) Lukas Jelinek, 2006, 2007"
/// incrontab help string
#define INCROND_HELP INCROND_DESCRIPTION "\n\n" \
"usage: incrond [<options>]\n\n" \
"<operation> may be one of the following:\n" \
"These options may be used:\n" \
" -?, --about gives short information about program\n" \
" -h, --help prints this help text\n" \
" -n, --foreground runs on foreground (no daemonizing)\n" \
" -k, --kill terminates running instance of incrond\n" \
" -f <FILE>, --config=<FILE> overrides default configuration file (requires root privileges)\n" \
" -V, --version prints program version\n\n" \
"For reporting bugs please use http:://bts.aiken.cz\n"
/// User name to user table mapping table
SUT_MAP g_ut;
/// Finish program yes/no
volatile bool g_fFinish = false;
/// Pipe for notifying about dead children
int g_cldPipe[2];
// Buffer for emptying child pipe
#define CHILD_PIPE_BUF_LEN 32
char g_cldPipeBuf[CHILD_PIPE_BUF_LEN];
/// Daemonize true/false
bool g_daemon = true;
/// Handles a signal.
/**
* For SIGTERM and SIGINT it sets the program finish variable.
* For SIGCHLD it writes a character into the notification pipe
* (this is a workaround made due to disability to reliably
* wait for dead children).
*
* \param[in] signo signal number
*/
void on_signal(int signo)
{
switch (signo) {
case SIGTERM:
case SIGINT:
g_fFinish = true;
break;
case SIGCHLD:
// first empty pipe (to prevent internal buffer overflow)
do {} while (read(g_cldPipe[0], g_cldPipeBuf, CHILD_PIPE_BUF_LEN) > 0);
// now write one character
write(g_cldPipe[1], "X", 1);
break;
default:;
}
}
/// Attempts to load all (user and system) incron tables.
/**
* Loaded tables are registered for processing events.
*
* \param[in] pEd inotify event dispatcher
*
* \throw InotifyException thrown if base table directory cannot be read
*/
void load_tables(EventDispatcher* pEd) throw (InotifyException)
{
// WARNING - this function has not been optimized!!!
std::string s;
if (!IncronCfg::GetValue("system_table_dir", s))
throw InotifyException("configuration system is corrupted", EINVAL);
DIR* d = opendir(s.c_str());
if (d != NULL) {
syslog(LOG_NOTICE, "loading system tables");
struct dirent* pDe = NULL;
while ((pDe = readdir(d)) != NULL) {
std::string un(pDe->d_name);
std::string path(IncronCfg::BuildPath(s, pDe->d_name));
bool ok = pDe->d_type == DT_REG;
if (pDe->d_type == DT_UNKNOWN) {
struct stat st;
if (stat(path.c_str(), &st) == 0)
ok = S_ISREG(st.st_mode);
}
if (ok) {
syslog(LOG_INFO, "loading table %s", pDe->d_name);
UserTable* pUt = new UserTable(pEd, un, true);
g_ut.insert(SUT_MAP::value_type(path, pUt));
pUt->Load();
}
}
closedir(d);
}
else {
syslog(LOG_WARNING, "cannot open system table directory (ignoring)");
}
if (!IncronCfg::GetValue("user_table_dir", s))
throw InotifyException("configuration system is corrupted", EINVAL);
d = opendir(s.c_str());
if (d == NULL)
throw InotifyException("cannot open user table directory", errno);
syslog(LOG_NOTICE, "loading user tables");
struct dirent* pDe = NULL;
while ((pDe = readdir(d)) != NULL) {
std::string un(pDe->d_name);
std::string path(IncronCfg::BuildPath(s, pDe->d_name));
bool ok = pDe->d_type == DT_REG;
if (pDe->d_type == DT_UNKNOWN) {
struct stat st;
if (stat(path.c_str(), &st) == 0)
ok = S_ISREG(st.st_mode);
}
if (ok) {
if (UserTable::CheckUser(pDe->d_name)) {
syslog(LOG_INFO, "loading table for user %s", pDe->d_name);
UserTable* pUt = new UserTable(pEd, un, false);
g_ut.insert(SUT_MAP::value_type(path, pUt));
pUt->Load();
}
else {
syslog(LOG_WARNING, "table for invalid user %s found (ignored)", pDe->d_name);
}
}
}
closedir(d);
}
/// Deallocates all memory used by incron tables and unregisters them from the dispatcher.
/**
* \param[in] pEd event dispatcher
*/
void free_tables(EventDispatcher* pEd)
{
pEd->Clear();
SUT_MAP::iterator it = g_ut.begin();
while (it != g_ut.end()) {
UserTable* pUt = (*it).second;
delete pUt;
it++;
}
g_ut.clear();
}
/// Prepares a 'dead/done child' notification pipe.
/**
* This function returns no value at all and on error it
* throws an exception.
*/
void prepare_pipe()
{
g_cldPipe[0] = -1;
g_cldPipe[1] = -1;
if (pipe(g_cldPipe) != 0)
throw InotifyException("cannot create notification pipe", errno, NULL);
for (int i=0; i<2; i++) {
int res = fcntl(g_cldPipe[i], F_GETFL);
if (res == -1)
throw InotifyException("cannot get pipe flags", errno, NULL);
res |= O_NONBLOCK;
if (fcntl(g_cldPipe[i], F_SETFL, res) == -1)
throw InotifyException("cannot set pipe flags", errno, NULL);
res = fcntl(g_cldPipe[i], F_GETFD);
if (res == -1)
throw InotifyException("cannot get pipe flags", errno, NULL);
res |= FD_CLOEXEC;
if (fcntl(g_cldPipe[i], F_SETFD, res) == -1)
throw InotifyException("cannot set pipe flags", errno, NULL);
}
}
/// Checks whether a parameter string is a specific command.
/**
* The string is accepted if it equals either the short or long
* form of the command.
*
* \param[in] s checked string
* \param[in] shortCmd short form of command
* \param[in] longCmd long form of command
* \return true = string accepted, false = otherwise
*/
/*
bool check_parameter(const char* s, const char* shortCmd, const char* longCmd)
{
return strcmp(s, shortCmd) == 0
|| strcmp(s, longCmd) == 0;
}
*/
/// Initializes a poll array.
/**
* \param[out] pfd poll structure array
* \param[in] pipefd pipe file descriptor
* \param[in] infd inotify infrastructure file descriptor
*/
void init_poll_array(struct pollfd pfd[], int pipefd, int infd)
{
pfd[0].fd = pipefd;
pfd[0].events = (short) POLLIN;
pfd[0].revents = (short) 0;
pfd[1].fd = infd;
pfd[1].events = (short) POLLIN;
pfd[1].revents = (short) 0;
}
/// Main application function.
/**
* \param[in] argc argument count
* \param[in] argv argument array
* \return 0 on success, 1 on error
*
* \attention In daemon mode, it finishes immediately.
*/
int main(int argc, char** argv)
{
AppArgs::Init();
if (!( AppArgs::AddOption("about", '?', AAT_NO_VALUE, false)
&& AppArgs::AddOption("help", 'h', AAT_NO_VALUE, false)
&& AppArgs::AddOption("foreground", 'n', AAT_NO_VALUE, false)
&& AppArgs::AddOption("kill", 'k', AAT_NO_VALUE, false)
&& AppArgs::AddOption("config", 'f', AAT_MANDATORY_VALUE, false)
&& AppArgs::AddOption("version", 'V', AAT_NO_VALUE, false)))
{
fprintf(stderr, "error while initializing application");
return 1;
}
AppArgs::Parse(argc, argv);
if (AppArgs::ExistsOption("help")) {
fprintf(stderr, "%s\n", INCROND_HELP);
return 0;
}
if (AppArgs::ExistsOption("about")) {
fprintf(stderr, "%s\n", INCROND_DESCRIPTION);
return 0;
}
if (AppArgs::ExistsOption("version")) {
fprintf(stderr, "%s\n", INCROND_VERSION);
return 0;
}
IncronCfg::Init();
std::string cfg;
if (!AppArgs::GetOption("config", cfg))
cfg = INCRON_CONFIG;
IncronCfg::Load(cfg);
std::string lckdir;
IncronCfg::GetValue("lockfile_dir", lckdir);
std::string lckfile;
IncronCfg::GetValue("lockfile_name", lckfile);
AppInstance app(lckfile, lckdir);
if (AppArgs::ExistsOption("kill")) {
fprintf(stderr, "attempting to terminate a running instance of incrond...\n");
if (app.Terminate()) {
fprintf(stderr, "the instance notified, going down\n");
return 0;
}
else {
fprintf(stderr, "error - incrond probably not running\n");
return 1;
}
}
if (AppArgs::ExistsOption("foreground"))
g_daemon = false;
openlog(INCROND_NAME, INCRON_LOG_OPTS, INCRON_LOG_FACIL);
syslog(LOG_NOTICE, "starting service (version %s, built on %s %s)", INCRON_VERSION, __DATE__, __TIME__);
AppArgs::Destroy();
int ret = 0;
std::string sysBase;
std::string userBase;
if (!IncronCfg::GetValue("system_table_dir", sysBase))
throw InotifyException("configuration is corrupted", EINVAL);
if (access(sysBase.c_str(), R_OK) != 0) {
syslog(LOG_CRIT, "cannot read directory for system tables (%s): (%i) %s", sysBase.c_str(), errno, strerror(errno));
if (!g_daemon)
fprintf(stderr, "cannot read directory for system tables (%s): (%i) %s", sysBase.c_str(), errno, strerror(errno));
ret = 1;
goto error;
}
if (!IncronCfg::GetValue("user_table_dir", userBase))
throw InotifyException("configuration is corrupted", EINVAL);
if (access(userBase.c_str(), R_OK) != 0) {
syslog(LOG_CRIT, "cannot read directory for user tables (%s): (%i) %s", userBase.c_str(), errno, strerror(errno));
if (!g_daemon)
fprintf(stderr, "cannot read directory for user tables (%s): (%i) %s", userBase.c_str(), errno, strerror(errno));
ret = 1;
goto error;
}
try {
if (g_daemon)
daemon(0, 0);
try {
if (!app.Lock()) {
syslog(LOG_CRIT, "another instance of incrond already running");
if (!g_daemon)
fprintf(stderr, "another instance of incrond already running\n");
ret = 1;
goto error;
}
} catch (AppInstException e) {
syslog(LOG_CRIT, "instance lookup failed: (%i) %s", e.GetErrorNumber(), strerror(e.GetErrorNumber()));
if (!g_daemon)
fprintf(stderr, "instance lookup failed: (%i) %s\n", e.GetErrorNumber(), strerror(e.GetErrorNumber()));
ret = 1;
goto error;
}
prepare_pipe();
Inotify in;
in.SetNonBlock(true);
in.SetCloseOnExec(true);
uint32_t wm = IN_CREATE | IN_CLOSE_WRITE | IN_DELETE | IN_MOVE | IN_DELETE_SELF | IN_UNMOUNT;
InotifyWatch stw(sysBase, wm);
in.Add(stw);
InotifyWatch utw(userBase, wm);
in.Add(utw);
EventDispatcher ed(g_cldPipe[0], &in, &stw, &utw);
try {
load_tables(&ed);
} catch (InotifyException e) {
int err = e.GetErrorNumber();
syslog(LOG_CRIT, "%s: (%i) %s", e.GetMessage().c_str(), err, strerror(err));
ret = 1;
goto error;
}
ed.Rebuild(); // not too efficient, but simple
signal(SIGTERM, on_signal);
signal(SIGINT, on_signal);
signal(SIGCHLD, on_signal);
syslog(LOG_NOTICE, "ready to process filesystem events");
while (!g_fFinish) {
int res = poll(ed.GetPollData(), ed.GetSize(), -1);
if (res > 0) {
if (ed.ProcessEvents())
UserTable::FinishDone();
}
else if (res < 0) {
if (errno != EINTR)
throw InotifyException("polling failed", errno, NULL);
}
}
free_tables(&ed);
if (g_cldPipe[0] != -1)
close(g_cldPipe[0]);
if (g_cldPipe[1] != -1)
close(g_cldPipe[1]);
} catch (InotifyException e) {
int err = e.GetErrorNumber();
syslog(LOG_CRIT, "*** unhandled exception occurred ***");
syslog(LOG_CRIT, " %s", e.GetMessage().c_str());
syslog(LOG_CRIT, " error: (%i) %s", err, strerror(err));
ret = 1;
}
error:
syslog(LOG_NOTICE, "stopping service");
closelog();
return ret;
}

/incron/tags/incron-0.5.7/incron.conf.example
0,0 → 1,72
#
# *** incron example configuration file ***
#
# (c) Lukas Jelinek, 2007
#
# Parameter: system_table_dir
# Meaning: system table directory
# Description: This directory is examined by incrond for system table files.
# Default: /etc/incron.d
#
# Example:
# system_table_dir = /var/spool/incron.systables
# Parameter: user_table_dir
# Meaning: user table directory
# Description: This directory is examined by incrond for user table files.
# Default: /var/spool/incron
#
# Example:
# user_table_dir = /var/spool/incron.usertables
# Parameter: allowed_users
# Meaning: allowed users list file
# Description: This file contains users allowed to use incron.
# Default: /etc/incron.allow
#
# Example:
# allowed_users = /etc/incron/allow
# Parameter: denied_users
# Meaning: denied users list file
# Description: This file contains users denied to use incron.
# Default: /etc/incron.deny
#
# Example:
# denied_users = /etc/incron/deny
# Parameter: lockfile_dir
# Meaning: application lock file directory
# Description: This directory is used for creating a lock avoiding to run
# multiple instances of incrond.
# Default: /var/run
#
# Example:
# lockfile_dir = /tmp
# Parameter: lockfile_name
# Meaning: application lock file name base
# Description: This name (appended by '.pid') is used for creating a lock
# avoiding to run multiple instances of incrond.
# Default: incrond
#
# Example:
# lockfile_name = incron.lock
# Parameter: editor
# Meaning: editor executable
# Description: This name or path is used to run as an editor for editting
# user tables.
# Default: vim
#
# Example:
# editor = nano

/incron/tags/incron-0.5.7/usertable.h
0,0 → 1,267
/// inotify cron daemon user tables header
/**
* \file usertable.h
*
* inotify cron system
*
* Copyright (C) 2006, 2007 Lukas Jelinek, <lukas@aiken.cz>
*
* This program is free software; you can use it, redistribute
* it and/or modify it under the terms of the GNU General Public
* License, version 2 (see LICENSE-GPL).
*
*/
#ifndef _USERTABLE_H_
#define _USERTABLE_H_
#include <map>
#include <deque>
#include <sys/poll.h>
#include "inotify-cxx.h"
#include "incrontab.h"
class UserTable;
/// User name to user table mapping definition
typedef std::map<std::string, UserTable*> SUT_MAP;
/// Callback for calling after a process finishes.
typedef void (*proc_done_cb)(InotifyWatch*);
/// Child process data
typedef struct
{
proc_done_cb onDone; ///< function called after process finishes
InotifyWatch* pWatch; ///< related watch
} ProcData_t;
/// fd-to-usertable mapping
typedef std::map<int, UserTable*> FDUT_MAP;
/// Watch-to-tableentry mapping
typedef std::map<InotifyWatch*, IncronTabEntry*> IWCE_MAP;
/// Child process list
typedef std::map<pid_t, ProcData_t> PROC_MAP;
/// Event dispatcher class.
/**
* This class processes events and distributes them as needed.
*/
class EventDispatcher
{
public:
/// Constructor.
/**
* \param[in] iPipeFd pipe descriptor
* \param[in] pIn inotify object for table management
* \param[in] pSys watch for system tables
* \param[in] pUser watch for user tables
*/
EventDispatcher(int iPipeFd, Inotify* pIn, InotifyWatch* pSys, InotifyWatch* pUser);
/// Destructor.
~EventDispatcher();
/// Processes events.
/**
* \return pipe event occurred yes/no
*/
bool ProcessEvents();
/// Registers an user table.
/**
* \param[in] pTab user table
*/
void Register(UserTable* pTab);
/// Unregisters an user table.
/**
* \param[in] pTab user table
*/
void Unregister(UserTable* pTab);
/// Returns the poll data size.
/**
* \return poll data size
*/
inline size_t GetSize() const
{
return m_size;
}
/// Returns the poll data.
/**
* \return poll data
*/
inline struct pollfd* GetPollData()
{
return m_pPoll;
}
/// Rebuilds the poll array data.
void Rebuild();
/// Removes all registered user tables.
/**
* It doesn't cause poll data rebuilding.
*/
inline void Clear()
{
m_maps.clear();
}
private:
int m_iPipeFd; ///< pipe file descriptor
int m_iMgmtFd; ///< table management file descriptor
Inotify* m_pIn; ///< table management inotify object
InotifyWatch* m_pSys; ///< watch for system tables
InotifyWatch* m_pUser; ///< watch for user tables
FDUT_MAP m_maps; ///< watch-to-usertable mapping
size_t m_size; ///< poll data size
struct pollfd* m_pPoll; ///< poll data array
/// Processes events on the table management inotify object.
void ProcessMgmtEvents();
};
/// User table class.
/**
* This class processes inotify events for an user. It creates
* child processes which do appropriate actions as defined
* in the user table file.
*/
class UserTable
{
public:
/// Constructor.
/**
* \param[in] pEd event dispatcher
* \param[in] rUser user name
* \param[in] fSysTable system table yes/no
*/
UserTable(EventDispatcher* pEd, const std::string& rUser, bool fSysTable);
/// Destructor.
virtual ~UserTable();
/// Loads the table.
/**
* All loaded entries have their inotify watches and are
* registered for event dispatching.
* If loading fails the table remains empty.
*/
void Load();
/// Removes all entries from the table.
/**
* All entries are unregistered from the event dispatcher and
* their watches are destroyed.
*/
void Dispose();
/// Processes an inotify event.
/**
* \param[in] rEvt inotify event
*/
void OnEvent(InotifyEvent& rEvt);
/// Cleans-up all zombie child processes and enables disabled watches.
/**
* \attention This method must be called AFTER processing all events
* which has been caused by the processes.
*/
static void FinishDone();
/// Checks whether the user may access a file.
/**
* Any access right (RWX) is sufficient.
*
* \param[in] rPath absolute file path
* \param[in] fNoFollow don't follow a symbolic link
* \return true = access granted, false = otherwise
*/
bool MayAccess(const std::string& rPath, bool fNoFollow) const;
/// Checks whether it is a system table.
/**
* \return true = system table, false = user table
*/
bool IsSystem() const;
/// Returns the related inotify object.
/**
* \return related inotify object
*/
Inotify* GetInotify()
{
return &m_in;
}
/// Checks whether an user exists and has permission to use incron.
/**
* It searches for the given user name in the user database.
* If it failes it returns 'false'. Otherwise it checks
* permission files for this user (see InCronTab::CheckUser()).
*
* \param[in] user user name
* \return true = user has permission to use incron, false = otherwise
*
* \sa InCronTab::CheckUser()
*/
inline static bool CheckUser(const char* user)
{
struct passwd* pw = getpwnam(user);
if (pw == NULL)
return false;
return IncronTab::CheckUser(user);
}
/// Runs a program as the table's user.
/**
* \attention Don't call from the main process (before forking)!
*/
void RunAsUser(char* const* argv) const;
private:
Inotify m_in; ///< inotify object
EventDispatcher* m_pEd; ///< event dispatcher
std::string m_user; ///< user name
bool m_fSysTable; ///< system table yes/no
IncronTab m_tab; ///< incron table
IWCE_MAP m_map; ///< watch-to-entry mapping
static PROC_MAP s_procMap; ///< child process mapping
/// Finds an entry for a watch.
/**
* \param[in] pWatch inotify watch
* \return pointer to the appropriate entry; NULL if no such entry exists
*/
IncronTabEntry* FindEntry(InotifyWatch* pWatch);
/// Prepares arguments for creating a child process.
/**
* \param[in] rCmd command string
* \param[out] argc argument count
* \param[out] argv argument array
* \return true = success, false = failure
*/
bool PrepareArgs(const std::string& rCmd, int& argc, char**& argv);
/// Frees memory allocated for arguments.
/**
* \param[in] argc argument count
* \param[in] argv argument array
*/
void CleanupArgs(int argc, char** argv);
};
#endif //_USERTABLE_H_

/incron/tags/incron-0.5.7/Makefile
0,0 → 1,119
PREFIX = /usr/local
USERDATADIR = /var/spool/incron
SYSDATADIR = /etc/incron.d
CFGDIR = /etc
MANPATH = /usr/share/man
RELEASE = incron-`cat VERSION`
RELEASEDIR = /tmp/$(RELEASE)
USER = root
CXX = g++
INSTALL = install
OPTIMIZE = -O2
DEBUG = -g0
WARNINGS = -Wall
CXXAUX = -pipe
CXXFLAGS = $(OPTIMIZE) $(DEBUG) $(WARNINGS) $(CXXAUX)
LDFLAGS = $(WARNINGS)
PROGRAMS = incrond incrontab
INCROND_OBJ = icd-main.o incrontab.o inotify-cxx.o usertable.o strtok.o appinst.o incroncfg.o appargs.o
INCRONTAB_OBJ = ict-main.o incrontab.o inotify-cxx.o strtok.o incroncfg.o appargs.o
all: $(PROGRAMS)
incrond: $(INCROND_OBJ)
$(CXX) $(LDFLAGS) -o $@ $(INCROND_OBJ)
incrontab: $(INCRONTAB_OBJ)
$(CXX) $(LDFLAGS) -o $@ $(INCRONTAB_OBJ)
.cpp.o:
$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) -o $@ $<
clean:
rm -f $(PROGRAMS)
rm -f *.o
distclean: clean
install: all install-man
[ -d $(PREFIX) ]
$(INSTALL) -m 04755 -o $(USER) incrontab $(PREFIX)/bin/
$(INSTALL) -m 0755 incrond $(PREFIX)/sbin/
$(INSTALL) -m 0755 -o $(USER) -d $(USERDATADIR)
$(INSTALL) -m 0755 -o $(USER) -d $(SYSDATADIR)
$(INSTALL) -m 0644 -o $(USER) incron.conf.example $(CFGDIR)
install-man: incrontab.1 incrontab.5 incrond.8 incron.conf.5
$(INSTALL) -m 0755 -d $(MANPATH)/man1
$(INSTALL) -m 0755 -d $(MANPATH)/man5
$(INSTALL) -m 0755 -d $(MANPATH)/man8
$(INSTALL) -m 0644 incrontab.1 $(MANPATH)/man1
$(INSTALL) -m 0644 incrontab.5 $(MANPATH)/man5
$(INSTALL) -m 0644 incrond.8 $(MANPATH)/man8
$(INSTALL) -m 0644 incron.conf.5 $(MANPATH)/man5
uninstall: uninstall-man
[ -d $(PREFIX) ]
rm -f $(PREFIX)/bin/incrontab
rm -f $(PREFIX)/sbin/incrond
rm -f $(CFGDIR)/incron.conf.example
uninstall-man:
rm -f $(MANPATH)/man1/incrontab.1
rm -f $(MANPATH)/man5/incrontab.5
rm -f $(MANPATH)/man8/incrond.8
rm -f $(MANPATH)/man5/incron.conf.5
update: uninstall install
release:
doxygen
mkdir -p $(RELEASEDIR)
cp -r doc $(RELEASEDIR)
cp *.h $(RELEASEDIR)
cp *.cpp $(RELEASEDIR)
cp incron.conf.example $(RELEASEDIR)
cp Makefile CHANGELOG COPYING LICENSE-GPL LICENSE-LGPL LICENSE-X11 README TODO VERSION $(RELEASEDIR)
cp incrond.8 incrontab.1 incrontab.5 incron.conf.5 $(RELEASEDIR)
tar -c -f $(RELEASE).tar -C $(RELEASEDIR)/.. $(RELEASE)
bzip2 -9 $(RELEASE).tar
tar -c -f $(RELEASE).tar -C $(RELEASEDIR)/.. $(RELEASE)
gzip --best $(RELEASE).tar
echo #!/bin/sh > myzip
echo cd $(RELEASEDIR)/.. >> myzip
echo zip -r -9 `pwd`/$(RELEASE).zip $(RELEASE) >> myzip
chmod 0700 myzip
./myzip
rm -f myzip
sha1sum $(RELEASE).tar.bz2 > sha1.txt
sha1sum $(RELEASE).tar.gz >> sha1.txt
sha1sum $(RELEASE).zip >> sha1.txt
rm -rf $(RELEASEDIR)
release-clean:
rm -f $(RELEASE).tar.bz2
rm -f $(RELEASE).tar.gz
rm -f $(RELEASE).zip
rm -f sha1.txt
.PHONY: all clean distclean install install-man uninstall uninstall-man release release-clean update
.POSIX:
icd-main.o: icd-main.cpp inotify-cxx.h incrontab.h usertable.h incron.h appinst.h incroncfg.h appargs.h
incrontab.o: incrontab.cpp incrontab.h inotify-cxx.h strtok.h
inotify-cxx.o: inotify-cxx.cpp inotify-cxx.h
usertable.o: usertable.cpp usertable.h strtok.h
ict-main.o: ict-main.cpp incrontab.h incron.h incroncfg.h appargs.h
strtok.o: strtok.cpp strtok.h
appinst.o: appinst.cpp appinst.h
incroncfg.o: incroncfg.cpp incroncfg.h
appargs.o: appargs.cpp appargs.h

/incron/tags/incron-0.5.7/appinst.cpp
0,0 → 1,198
/// Application instance class implementation
/**
* \file appinst.cpp
*
* Copyright (C) 2007 Lukas Jelinek, <lukas@aiken.cz>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of one of the following licenses:
*
* \li 1. X11-style license (see LICENSE-X11)
* \li 2. GNU Lesser General Public License, version 2.1 (see LICENSE-LGPL)
* \li 3. GNU General Public License, version 2 (see LICENSE-GPL)
*
* If you want to help with choosing the best license for you,
* please visit http://www.gnu.org/licenses/license-list.html.
*
*/
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <signal.h>
#include "appinst.h"
/// Lockfile permissions (currently 0644)
#define APPLOCK_PERM (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)
AppInstance::AppInstance(const std::string& rName, const std::string& rBase)
: m_fLocked(false)
{
std::string base(rBase);
if (base.empty())
base = APPLOCK_BASEDIR;
if (base[base.length()-1] == '/')
m_path = base + rName + ".pid";
else
m_path = base + "/" + rName + ".pid";
}
AppInstance::~AppInstance()
{
try {
Unlock();
} catch (AppInstException e) {}
}
bool AppInstance::DoLock()
{
int fd = open(m_path.c_str(), O_WRONLY | O_CREAT | O_EXCL, APPLOCK_PERM);
if (fd != -1) {
FILE* f = fdopen(fd, "w");
if (f == NULL) {
AppInstException e(errno);
close(fd);
throw e;
}
if (fprintf(f, "%u", (unsigned) getpid()) <= 0) {
AppInstException e(errno);
fclose(f);
throw e;
}
if (fclose(f) != 0)
throw AppInstException(errno);
m_fLocked = true;
return true;
}
if (errno != EEXIST)
throw AppInstException(errno);
return false;
}
bool AppInstance::Lock()
{
for (int i=0; i<100; i++) {
if (DoLock())
return true;
FILE* f = fopen(m_path.c_str(), "r");
if (f == NULL) {
if (errno != ENOENT)
throw AppInstException(errno);
}
else {
unsigned pid;
ssize_t len = fscanf(f, "%u", &pid);
if (len == -1) {
AppInstException e(errno);
fclose(f);
throw e;
}
else if (len == 0) {
AppInstException e(EIO);
fclose(f);
throw e;
}
fclose(f);
int res = kill((pid_t) pid, 0);
if (res == 0)
return false;
if (errno != ESRCH)
throw AppInstException(errno);
res = unlink(m_path.c_str());
if (res != 0 && errno != ENOENT)
throw AppInstException(errno);
}
}
return false;
}
void AppInstance::Unlock()
{
if (!m_fLocked)
return;
if (unlink(m_path.c_str()) != 0 && errno != ENOENT)
throw AppInstException(errno);
m_fLocked = false;
}
bool AppInstance::Exists() const
{
if (m_fLocked)
return true;
FILE* f = fopen(m_path.c_str(), "r");
if (f == NULL) {
if (errno == ENOENT)
return false;
else
throw AppInstException(errno);
}
bool ok = false;
unsigned pid;
if (fscanf(f, "%u", &pid) == 1) {
if (kill((pid_t) pid, 0) == 0)
ok = true;
else if (errno != ESRCH) {
AppInstException e(errno);
fclose(f);
throw e;
}
}
fclose(f);
return ok;
}
bool AppInstance::SendSignal(int iSigNo) const
{
FILE* f = fopen(m_path.c_str(), "r");
if (f == NULL) {
if (errno == ENOENT)
return false;
else
throw AppInstException(errno);
}
bool ok = false;
unsigned pid;
if (fscanf(f, "%u", &pid) == 1) {
if (pid != (unsigned) getpid()) {
if (kill((pid_t) pid, iSigNo) == 0) {
ok = true;
}
else if (errno != ESRCH) {
AppInstException e(errno);
fclose(f);
throw e;
}
}
}
fclose(f);
return ok;
}

/incron/tags/incron-0.5.7/appinst.h
0,0 → 1,137
/// Application instance class header
/**
* \file appinst.h
*
* Copyright (C) 2007 Lukas Jelinek, <lukas@aiken.cz>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of one of the following licenses:
*
* \li 1. X11-style license (see LICENSE-X11)
* \li 2. GNU Lesser General Public License, version 2.1 (see LICENSE-LGPL)
* \li 3. GNU General Public License, version 2 (see LICENSE-GPL)
*
* If you want to help with choosing the best license for you,
* please visit http://www.gnu.org/licenses/license-list.html.
*
*/
#ifndef APPINST_H_
#define APPINST_H_
#include <string>
#define APPLOCK_BASEDIR "/var/run"
/// Exception class.
/**
* This class provides information about occurred errors.
*/
class AppInstException
{
public:
/// Constructor.
/**
* \param[in] iErr error number
*/
AppInstException(int iErr) : m_iErr(iErr) {}
/// Returns the error number.
/**
* \return error number
*/
inline int GetErrorNumber() const
{
return m_iErr;
}
private:
int m_iErr; ///< error number
};
/// Application instance management class.
/**
* This class is intended for application which require to
* be running only once (one instance only). It provides some
* methods for simple locking, signaling etc.
*/
class AppInstance
{
public:
/// Constructor.
/**
* \param[in] rName application name
* \param[in] rBase lockfile base directory
*
* \attention If an empty base directory is given it is replaced by
* the default value.
*/
AppInstance(const std::string& rName, const std::string& rBase = APPLOCK_BASEDIR);
/// Destructor.
~AppInstance();
/// Attempts to lock the instance.
/**
* This method attempts to create a lockfile. If the file
* already exists it checks whether its owner is still living.
* If it does this method fails. Otherwise it unlinks this file
* and re-attempts to create it.
*
* \return true = instance locked, false = otherwise
*/
bool Lock();
/// Unlocks the instance.
/**
* This method removes (unlinks) the appropriate lockfile.
* If the instance hasn't been locked this method has no
* effect.
*/
void Unlock();
/// Checks whether an instance of this application exists.
/**
* If this instance has acquired the lockfile the call will
* be successful. Otherwise it checks for existence of
* another running instance.
*
* \return true = instance exists, false = otherwise
*/
bool Exists() const;
/// Sends a signal to an instance of this application.
/**
* This method doesn't signal the current instance.
*
* \param[in] iSigNo signal number
* \return true = success, false = otherwise
*/
bool SendSignal(int iSigNo) const;
/// Terminates an instance of this application.
/**
* This method doesn't terminate the current instance.
*
* \return true = success, false = otherwise
*/
inline bool Terminate() const
{
return SendSignal(SIGTERM);
}
protected:
bool DoLock();
private:
std::string m_path; ///< lock path
bool m_fLocked; ///< locked yes/no
};
#endif /*APPINST_H_*/

/incron/tags/incron-0.5.7/LICENSE-GPL
0,0 → 1,339
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
675 Mass Ave, Cambridge, MA 02139, USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it. (Some other Free Software Foundation software is covered by
the GNU Library General Public License instead.) You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things.
To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know their
rights.
We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.
Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software. If the software is modified by someone else and passed on, we
want its recipients to know that what they have is not the original, so
that any problems introduced by others will not reflect on the original
authors' reputations.
Finally, any free program is threatened constantly by software
patents. We wish to avoid the danger that redistributors of a free
program will individually obtain patent licenses, in effect making the
program proprietary. To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all.
The precise terms and conditions for copying, distribution and
modification follow.
GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License. The "Program", below,
refers to any such program or work, and a "work based on the Program"
means either the Program or any derivative work under copyright law:
that is to say, a work containing the Program or a portion of it,
either verbatim or with modifications and/or translated into another
language. (Hereinafter, translation is included without limitation in
the term "modification".) Each licensee is addressed as "you".
Activities other than copying, distribution and modification are not
covered by this License; they are outside its scope. The act of
running the Program is not restricted, and the output from the Program
is covered only if its contents constitute a work based on the
Program (independent of having been made by running the Program).
Whether that is true depends on what the Program does.
1. You may copy and distribute verbatim copies of the Program's
source code as you receive it, in any medium, provided that you
conspicuously and appropriately publish on each copy an appropriate
copyright notice and disclaimer of warranty; keep intact all the
notices that refer to this License and to the absence of any warranty;
and give any other recipients of the Program a copy of this License
along with the Program.
You may charge a fee for the physical act of transferring a copy, and
you may at your option offer warranty protection in exchange for a fee.
2. You may modify your copy or copies of the Program or any portion
of it, thus forming a work based on the Program, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:
a) You must cause the modified files to carry prominent notices
stating that you changed the files and the date of any change.
b) You must cause any work that you distribute or publish, that in
whole or in part contains or is derived from the Program or any
part thereof, to be licensed as a whole at no charge to all third
parties under the terms of this License.
c) If the modified program normally reads commands interactively
when run, you must cause it, when started running for such
interactive use in the most ordinary way, to print or display an
announcement including an appropriate copyright notice and a
notice that there is no warranty (or else, saying that you provide
a warranty) and that users may redistribute the program under
these conditions, and telling the user how to view a copy of this
License. (Exception: if the Program itself is interactive but
does not normally print such an announcement, your work based on
the Program is not required to print an announcement.)
These requirements apply to the modified work as a whole. If
identifiable sections of that work are not derived from the Program,
and can be reasonably considered independent and separate works in
themselves, then this License, and its terms, do not apply to those
sections when you distribute them as separate works. But when you
distribute the same sections as part of a whole which is a work based
on the Program, the distribution of the whole must be on the terms of
this License, whose permissions for other licensees extend to the
entire whole, and thus to each and every part regardless of who wrote it.
Thus, it is not the intent of this section to claim rights or contest
your rights to work written entirely by you; rather, the intent is to
exercise the right to control the distribution of derivative or
collective works based on the Program.
In addition, mere aggregation of another work not based on the Program
with the Program (or with a work based on the Program) on a volume of
a storage or distribution medium does not bring the other work under
the scope of this License.
3. You may copy and distribute the Program (or a work based on it,
under Section 2) in object code or executable form under the terms of
Sections 1 and 2 above provided that you also do one of the following:
a) Accompany it with the complete corresponding machine-readable
source code, which must be distributed under the terms of Sections
1 and 2 above on a medium customarily used for software interchange; or,
b) Accompany it with a written offer, valid for at least three
years, to give any third party, for a charge no more than your
cost of physically performing source distribution, a complete
machine-readable copy of the corresponding source code, to be
distributed under the terms of Sections 1 and 2 above on a medium
customarily used for software interchange; or,
c) Accompany it with the information you received as to the offer
to distribute corresponding source code. (This alternative is
allowed only for noncommercial distribution and only if you
received the program in object code or executable form with such
an offer, in accord with Subsection b above.)
The source code for a work means the preferred form of the work for
making modifications to it. For an executable work, complete source
code means all the source code for all modules it contains, plus any
associated interface definition files, plus the scripts used to
control compilation and installation of the executable. However, as a
special exception, the source code distributed need not include
anything that is normally distributed (in either source or binary
form) with the major components (compiler, kernel, and so on) of the
operating system on which the executable runs, unless that component
itself accompanies the executable.
If distribution of executable or object code is made by offering
access to copy from a designated place, then offering equivalent
access to copy the source code from the same place counts as
distribution of the source code, even though third parties are not
compelled to copy the source along with the object code.
4. You may not copy, modify, sublicense, or distribute the Program
except as expressly provided under this License. Any attempt
otherwise to copy, modify, sublicense or distribute the Program is
void, and will automatically terminate your rights under this License.
However, parties who have received copies, or rights, from you under
this License will not have their licenses terminated so long as such
parties remain in full compliance.
5. You are not required to accept this License, since you have not
signed it. However, nothing else grants you permission to modify or
distribute the Program or its derivative works. These actions are
prohibited by law if you do not accept this License. Therefore, by
modifying or distributing the Program (or any work based on the
Program), you indicate your acceptance of this License to do so, and
all its terms and conditions for copying, distributing or modifying
the Program or works based on it.
6. Each time you redistribute the Program (or any work based on the
Program), the recipient automatically receives a license from the
original licensor to copy, distribute or modify the Program subject to
these terms and conditions. You may not impose any further
restrictions on the recipients' exercise of the rights granted herein.
You are not responsible for enforcing compliance by third parties to
this License.
7. If, as a consequence of a court judgment or allegation of patent
infringement or for any other reason (not limited to patent issues),
conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot
distribute so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you
may not distribute the Program at all. For example, if a patent
license would not permit royalty-free redistribution of the Program by
all those who receive copies directly or indirectly through you, then
the only way you could satisfy both it and this License would be to
refrain entirely from distribution of the Program.
If any portion of this section is held invalid or unenforceable under
any particular circumstance, the balance of the section is intended to
apply and the section as a whole is intended to apply in other
circumstances.
It is not the purpose of this section to induce you to infringe any
patents or other property right claims or to contest validity of any
such claims; this section has the sole purpose of protecting the
integrity of the free software distribution system, which is
implemented by public license practices. Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is willing
to distribute software through any other system and a licensee cannot
impose that choice.
This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.
8. If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
those countries, so that distribution is permitted only in or among
countries not thus excluded. In such case, this License incorporates
the limitation as if written in the body of this License.
9. The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies a version number of this License which applies to it and "any
later version", you have the option of following the terms and conditions
either of that version or of any later version published by the Free
Software Foundation. If the Program does not specify a version number of
this License, you may choose any version ever published by the Free Software
Foundation.
10. If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are different, write to the author
to ask for permission. For software which is copyrighted by the Free
Software Foundation, write to the Free Software Foundation; we sometimes
make exceptions for this. Our decision will be guided by the two goals
of preserving the free status of all derivatives of our free software and
of promoting the sharing and reuse of software generally.
NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
Appendix: How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) 19yy <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) 19yy name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Library General
Public License instead of this License.

/incron/tags/incron-0.5.7/appargs.h
0,0 → 1,234
/// application arguments processor header
/**
* \file appargs.h
*
* application arguments processor
*
* Copyright (C) 2007 Lukas Jelinek, <lukas@aiken.cz>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of one of the following licenses:
*
* \li 1. X11-style license (see LICENSE-X11)
* \li 2. GNU Lesser General Public License, version 2.1 (see LICENSE-LGPL)
* \li 3. GNU General Public License, version 2 (see LICENSE-GPL)
*
* If you want to help with choosing the best license for you,
* please visit http://www.gnu.org/licenses/license-list.html.
*
*/
#ifndef APPARGS_H_
#define APPARGS_H_
#include <string>
#include <map>
#include <deque>
/// Option argument type
typedef enum
{
AAT_NO_VALUE, ///< no value needed
AAT_OPTIONAL_VALUE, ///< optional value
AAT_MANDATORY_VALUE ///< mandatory value
} AppArgType_t;
#define APPARGS_NOLIMIT 0x7fffffff ///< value count has no limit
/// Argument option type
typedef struct
{
AppArgType_t type; ///< argument type
bool mand; ///< mandatory yes/no
bool found; ///< found in argument vector
std::string val; ///< value
bool hasVal; ///< value is set
} AppArgOption_t;
/// Mapping from long option name to option data
typedef std::map<std::string, AppArgOption_t*> AA_LONG_MAP;
/// Mapping from short option name to option data
typedef std::map<char, AppArgOption_t*> AA_SHORT_MAP;
/// Value list type
typedef std::deque<std::string> AA_VAL_LIST;
/// Application arguments
/**
* This class is set-up for processing command line arguments.
* Then it parses these arguments and builds data which
* can be queried later.
*
* There are two categories of arguments:
* \li options (a.k.a. switches)
* \li values
*
* Options represent changeable parameters of the application.
* Values are a kind of input data.
*
* Each option has one of the following types:
* \li no value (two-state logic, e.g. running on foreground/background)
* \li optional value (e.g. for logging: another file than default can be specified)
* \li mandatory value (e.g. custom configuration file)
*
* Each option always have two forms - long one (introcuded by
* two hyphens, e.g. --edit) and short one (introduced by one
* hyphen, e.g. -e). These forms are functionally equivalent.
*
* Unknown options are silently ignored.
*/
class AppArgs
{
public:
/// Initializes the processor.
/**
* \param[in] valMinCnt minimum count of values
* \param[in] valMaxCnt maximum number of values (no effect if lower than valMinCnt)
*/
static void Init(size_t valMinCnt = 0, size_t valMaxCnt = APPARGS_NOLIMIT);
/// Releases resources allocated by the processor.
/**
* This method should be called if the argument values are
* no longer needed.
*/
static void Destroy();
/// Parses arguments and builds the appropriate structure.
/**
* \param[in] argc argument count
* \param[in] argv argument vector
*
* \attention All errors are silently ignored.
*/
static void Parse(int argc, const char* const* argv);
/// Checks whether the arguments have valid form.
/**
* Arguments are valid if:
* \li all mandatory options are present
* \li all options with mandatory values have their values
* \li value count is between its minimum and maximum
* \li there are no unknown options (if unknown options are not accepted)
*
* \return true = arguments valid, false = otherwise
*/
static bool IsValid();
/// Checks whether an option exists.
/**
* \param[in] rArg long option name
* \return true = option exists, false = otherwise
*/
static bool ExistsOption(const std::string& rArg);
/// Extracts an option value.
/**
* \param[in] rArg long option name
* \param[out] rVal option value
* \return true = value extracted, false = option not found or has no value
*/
static bool GetOption(const std::string& rArg, std::string& rVal);
/// Adds an option.
/**
* This method is intended to be called between initilization
* and parsing. It adds an option which may (or must) occur
* inside the argument vector.
*
* \param[in] rName long option name
* \param[in] cShort short (one-character) option name
* \param[in] type argument type
* \param[in] fMandatory option is mandatory yes/no
* \return true = success, false = failure (e.g. option already exists)
*/
static bool AddOption(const std::string& rName, char cShort, AppArgType_t type, bool fMandatory);
/// Returns the count of values.
/**
* \return count of values
*/
static size_t GetValueCount();
/// Extracts a value.
/**
* \param[in] index value index
* \param[out] rVal extracted value
* \return true = value extracted, false = otherwise
*/
static bool GetValue(size_t index, std::string& rVal);
/// Dumps information about options and value to STDERR.
/**
* \attention This method may be very slow.
*/
static void Dump();
protected:
/// Checks whether a string is an option.
/**
* \param[in] pchStr text string
* \return true = option, false = otherwise
*/
static bool IsOption(const char* pchStr);
/// Checks whether a string is a long option.
/**
* This methos assumes the string is an option
* (if not the behavior is undefined).
*
* \param[in] pchStr text string
* \return true = option, false = otherwise
*/
static bool IsLongOption(const char* pchStr);
/// Parses a string and attempts to treat it as a long option.
/**
* \param[in] pchStr text string
* \param[out] rName option name
* \param[out] rVal value string
* \param[out] rfHasVal option has value yes/no
* \return true = success, false = failure
*/
static bool ParseLong(const char* pchStr, std::string& rName, std::string& rVal, bool& rfHasVal);
/// Parses a string and attempts to treat it as a short option.
/**
* \param[in] pchStr text string
* \param[out] rcName option name
* \param[out] rVal value string
* \param[out] rfHasVal option has value yes/no
*
* \attention This method assumes the string is a valid short option.
*/
static void ParseShort(const char* pchStr, char& rcName, std::string& rVal, bool& rfHasVal);
/// Dumps an option to STDERR.
/**
* \param[in] rName long option name
* \param[in] cShort short option name
* \param[in] pOpt option data
*/
static void DumpOption(const std::string& rName, char cShort, AppArgOption_t* pOpt);
private:
static size_t s_minCnt; ///< minimum value count
static size_t s_maxCnt; ///< maximum value count
static AA_LONG_MAP s_longMap; ///< mapping from long names to data
static AA_SHORT_MAP s_shortMap; ///< mapping from short names to data
static AA_VAL_LIST s_valList; ///< value list
};
#endif /*APPARGS_H_*/

/incron/tags/incron-0.5.7/incroncfg.cpp
0,0 → 1,195
/// inotify cron configuration implementation
/**
* \file incroncfg.cpp
*
* incron configuration
*
* Copyright (C) 2007 Lukas Jelinek, <lukas@aiken.cz>
*
* This program is free software; you can use it, redistribute
* it and/or modify it under the terms of the GNU General Public
* License, version 2 (see LICENSE-GPL).
*
*/
#include <fstream>
#include <sstream>
#include "incroncfg.h"
#define INCRON_CFG_DEFAULT "/etc/incron.conf"
typedef std::map<std::string, std::string> CFG_MAP;
typedef CFG_MAP::iterator CFG_ITER;
CFG_MAP IncronCfg::m_values;
CFG_MAP IncronCfg::m_defaults;
void IncronCfg::Init()
{
m_defaults.insert(CFG_MAP::value_type("system_table_dir", "/etc/incron.d"));
m_defaults.insert(CFG_MAP::value_type("user_table_dir", "/var/spool/incron"));
m_defaults.insert(CFG_MAP::value_type("allowed_users", "/etc/incron.allow"));
m_defaults.insert(CFG_MAP::value_type("denied_users", "/etc/incron.deny"));
m_defaults.insert(CFG_MAP::value_type("lockfile_dir", "/var/run"));
m_defaults.insert(CFG_MAP::value_type("lockfile_name", "incrond"));
m_defaults.insert(CFG_MAP::value_type("editor", ""));
}
void IncronCfg::Load(const std::string& rPath)
{
char s[1024];
std::ifstream is(rPath.c_str());
if (is.is_open()) {
while (!is.eof() && !is.fail()) {
is.getline(s, 1023);
std::string key, val;
if (ParseLine(s, key, val)) {
m_values.insert(CFG_MAP::value_type(key, val));
}
}
is.close();
return;
}
if (rPath == INCRON_CFG_DEFAULT)
return;
is.open(INCRON_CFG_DEFAULT);
if (is.is_open()) {
while (!is.eof() && !is.fail()) {
is.getline(s, 1023);
std::string key, val;
if (ParseLine(s, key, val)) {
m_values.insert(CFG_MAP::value_type(key, val));
}
}
is.close();
}
}
bool IncronCfg::GetValue(const std::string& rKey, std::string& rVal)
{
CFG_ITER it = m_values.find(rKey);
if (it != m_values.end()) {
rVal = (*it).second;
return true;
}
it = m_defaults.find(rKey);
if (it != m_defaults.end()) {
rVal = (*it).second;
return true;
}
return false;
}
bool IncronCfg::GetValue(const std::string& rKey, int& rVal)
{
std::string s;
if (GetValue(rKey, s)) {
if (sscanf(s.c_str(), "%i", &rVal) == 1)
return true;
}
return false;
}
bool IncronCfg::GetValue(const std::string& rKey, unsigned& rVal)
{
std::string s;
if (GetValue(rKey, s)) {
if (sscanf(s.c_str(), "%u", &rVal) == 1)
return true;
}
return false;
}
bool IncronCfg::GetValue(const std::string& rKey, bool& rVal)
{
std::string s;
if (GetValue(rKey, s)) {
size_t len = (size_t) s.length();
for (size_t i = 0; i < len; i++) {
s[i] = (char) tolower(s[i]);
}
rVal = (s == "1" || s == "true" || s == "yes" || s == "on" || s == "enable" || s == "enabled");
return true;
}
return false;
}
std::string IncronCfg::BuildPath(const std::string& rPath, const std::string& rName)
{
if (rPath.rfind('/') == rPath.length() - 1)
return rPath + rName;
return rPath + "/" + rName;
}
bool IncronCfg::ParseLine(const char* s, std::string& rKey, std::string& rVal)
{
// CAUTION: This code hasn't been optimized. It may be slow.
char key[1024], val[1024];
if (IsComment(s))
return false;
std::istringstream ss(s);
ss.get(key, 1023, '=');
if (ss.fail())
return false;
ss.get(val, 1023);
if (ss.fail())
return false;
rKey = key;
rVal = val;
std::string::size_type a = rKey.find_first_not_of(" \t");
std::string::size_type b = rKey.find_last_not_of(" \t");
if (a == std::string::npos || b == std::string::npos)
return false;
rKey = rKey.substr(a, b-a+1);
a = rVal.find_first_not_of(" \t=");
b = rVal.find_last_not_of(" \t");
if (a == std::string::npos || b == std::string::npos) {
rVal = "";
}
else {
rVal = rVal.substr(a, b-a+1);
}
return true;
}
bool IncronCfg::IsComment(const char* s)
{
char* sx = strchr(s, '#');
if (sx == NULL)
return false;
size_t len = sx - s;
for (size_t i = 0; i < len; i++) {
if (!(s[i] == ' ' || s[i] == '\t'))
return false;
}
return true;
}

/incron/tags/incron-0.5.7/README
0,0 → 1,115
inotify cron system
(c) Lukas Jelinek, 2006, 2007
1. About
2. Requirements
3. How to use
4. Bugs, suggestions
5. Licensing
6. Documentation
========================================================================
1. About
This program is the "inotify cron" system. It consist of a daemon and
a table manipulator. You can use it a similar way as the regular cron.
The difference is that the inotify cron handles filesystem events
rather than time periods.
2. Requirements
* Linux kernel 2.6.13 or later (with inotify compiled in)
* inotify headers (inotify.h, sometimes inotify-syscalls.h) installed in
<INCLUDE_DIR>/sys. The most common place is /usr/include/sys.
* GCC 4.x compiler (probably works also with GCC 3.4, possibly with
older versions too)
3. How to build
Because this version is very early it does not contain a standard
portable build mechanism. There is only a Makefile which must be
modified manually. On many Linux systems you need not to change
anything.
Please review the Makefile BEFORE you type 'make'. Especially
check the PREFIX and other common variables. If done you can
now build the files ('make').
The binaries must be of course installed as root.
If you want to use (after editting) the example configuration
file simply rename it from /etc/incron.conf.example to
/etc/incron.conf (you can also use -f <config> for one-time
use of a custom configuration file).
4. How to use
The incron daemon (incrond) must be run under root (typically from
runlevel script etc.). It loads the current user tables and hooks
them for later changes.
The incron table manipulator may be run under any regular user
since it SUIDs. For manipulation with the tables use basically
the same syntax as for the crontab program. You can import a table,
remove and edit the current table.
The user table rows have the following syntax:
<path> <mask> <command>
Where:
<path> is a filesystem path (currently avoid whitespaces!)
<mask> is a symbolic (see inotify.h; use commas for separating
symbols) or numeric mask for events
<command> is an application or script to run on the events
The command may contain these wildcards:
$$ - a dollar sign
$@ - the watched filesystem path (see above)
$# - the event-related file name
$% - the event flags (textually)
$& - the event flags (numerically)
The mask may additionaly contain a special symbol IN_NO_LOOP which
disables events occurred during the event handling (to avoid loops).
Example 1: You need to run program 'abc' with the full file path as
an argument every time a file is changed in /var/mail. One of
the solutions follows:
/var/mail IN_CLOSE_WRITE abc $@/$#
Example 2: You need to run program 'efg' with the full file path as
the first argument and the numeric event flags as the second one.
It have to monitor all events on files in /tmp. Here is it:
/tmp IN_ALL_EVENTS efg $@/$# $&
Since 0.4.0 also system tables are supported. They are located in
/etc/incron.d and their commands use root privileges. System tables
are intended to be changed directly (without incrontab).
Some parameters of both incrontab and incrond can be changed by
the configuration. See the example file for more information.
5. Bugs, suggestions
THIS PROGRAM IS AN ALPHA VERSION. IT PROBABLY CONTAINS BUGS AND
THEREFORE IT IS NOT INTENDED FOR PRODUCTION USE.
If you find a bug or have a suggestion how to improve the program,
please use the bug tracking system at http://bts.aiken.cz.
6. Licensing
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License,
version 2 (see LICENSE-GPL).
Some parts may be also covered by other licenses.
Please look into the source files for detailed information.

/incron/tags/incron-0.5.7/incroncfg.h
0,0 → 1,129
/// inotify cron configuration header
/**
* \file incroncfg.h
*
* incron configuration
*
* Copyright (C) 2007 Lukas Jelinek, <lukas@aiken.cz>
*
* This program is free software; you can use it, redistribute
* it and/or modify it under the terms of the GNU General Public
* License, version 2 (see LICENSE-GPL).
*
*/
#ifndef INCRONCFG_H_
#define INCRONCFG_H_
#include <string>
#include <map>
/// Configuration class.
/**
* This class provides access to values loaded from
* a configuration file (either a explicitly specified one
* or the default one).
*/
class IncronCfg
{
public:
/// Initializes default configuration values.
static void Init();
/// Loads configuration values.
/**
* This method attempts to load configuration values
* from the specified file. If it fails (e.g. the file
* doesn't exist) the default file is read. As the last
* resort (for the case the default file can't be loaded)
* the hard-wired values are used.
*
* \param[in] rPath configuration file path
*/
static void Load(const std::string& rPath);
/// Retrieves a configuration value.
/**
* This method attempts to find the appropriate configuration
* value for the given key and stores it into the given
* variable.
*
* \param[in] rKey value key
* \param[out] rVal retrieved value
* \return true = success, false = failure (invalid key)
*/
static bool GetValue(const std::string& rKey, std::string& rVal);
/// Retrieves a configuration value.
/**
* This method attempts to find the appropriate configuration
* value for the given key and stores it into the given
* variable.
*
* \param[in] rKey value key
* \param[out] rVal retrieved value
* \return true = success, false = failure (invalid key)
*/
static bool GetValue(const std::string& rKey, int& rVal);
/// Retrieves a configuration value.
/**
* This method attempts to find the appropriate configuration
* value for the given key and stores it into the given
* variable.
*
* \param[in] rKey value key
* \param[out] rVal retrieved value
* \return true = success, false = failure (invalid key)
*/
static bool GetValue(const std::string& rKey, unsigned& rVal);
/// Retrieves a configuration value.
/**
* This method attempts to find the appropriate configuration
* value for the given key and stores it into the given
* variable.
*
* \param[in] rKey value key
* \param[out] rVal retrieved value
* \return true = success, false = failure (invalid key)
*/
static bool GetValue(const std::string& rKey, bool& rVal);
/// Builds a file path.
/**
* This function composes a path from a base path and a file name.
*
* \param[in] rPath base path
* \param[in] rName file name
* \return full path
*/
static std::string BuildPath(const std::string& rPath, const std::string& rName);
protected:
/// Parses a line a attempts to get a key and a value.
/**
* \param[in] s text line
* \param[out] rKey key
* \param[out] rVal value
* \return true = success, false = failure
*/
static bool ParseLine(const char* s, std::string& rKey, std::string& rVal);
/// Checks whether a line is a comment.
/**
* \param[in] s text line
* \return true = comment, false = otherwise
*/
static bool IsComment(const char* s);
private:
static std::map<std::string, std::string> m_values;
static std::map<std::string, std::string> m_defaults;
};
#endif /*INCRONCFG_H_*/

/incron/tags/incron-0.5.7/incrontab.cpp
0,0 → 1,252
/// inotify cron table manipulator classes implementation
/**
* \file incrontab.cpp
*
* inotify cron system
*
* Copyright (C) 2006, 2007 Lukas Jelinek, <lukas@aiken.cz>
*
* This program is free software; you can use it, redistribute
* it and/or modify it under the terms of the GNU General Public
* License, version 2 (see LICENSE-GPL).
*
*/
#include <sstream>
#include <stdio.h>
#include <errno.h>
#include "inotify-cxx.h"
#include "incrontab.h"
#include "incroncfg.h"
/*
/// Allowed users
#define INCRON_ALLOW_PATH "/etc/incron.allow"
/// Denied users
#define INCRON_DENY_PATH "/etc/incron.deny"
*/
/*
* ALLOW/DENY SEMANTICS
*
* If /etc/incron.allow exists ONLY users contained here
* are allowed to use incron.
*
* Otherwise, if /etc/incron.deny exists only user NOT
* contained here are allowed to use incron.
*
* Otherwise all users may use incron.
*
*/
IncronTabEntry::IncronTabEntry()
: m_uMask(0),
m_fNoLoop(false)
{
}
IncronTabEntry::IncronTabEntry(const std::string& rPath, uint32_t uMask, const std::string& rCmd)
: m_path(rPath),
m_uMask(uMask),
m_cmd(rCmd)
{
}
std::string IncronTabEntry::ToString() const
{
std::ostringstream ss;
std::string m;
InotifyEvent::DumpTypes(m_uMask, m);
if (m.empty()) {
m = m_fNoLoop ? "IN_NO_LOOP" : "0";
}
else {
if (m_fNoLoop)
m.append(",IN_NO_LOOP");
}
ss << GetSafePath(m_path) << " " << m << " " << m_cmd;
return ss.str();
}
bool IncronTabEntry::Parse(const std::string& rStr, IncronTabEntry& rEntry)
{
unsigned long u;
std::string s1, s2, s3;
StringTokenizer tok(rStr, ' ', '\\');
if (!tok.HasMoreTokens())
return false;
s1 = tok.GetNextToken(true);
if (!tok.HasMoreTokens())
return false;
s2 = tok.GetNextToken(true);
if (!tok.HasMoreTokens())
return false;
tok.SetNoPrefix();
s3 = tok.GetRemainder();
SIZE len = s3.length();
if (len > 0 && s3[len-1] == '\n')
s3.resize(len-1);
rEntry.m_path = s1;
rEntry.m_cmd = s3;
rEntry.m_uMask = 0;
rEntry.m_fNoLoop = false;
if (sscanf(s2.c_str(), "%lu", &u) == 1) {
rEntry.m_uMask = (uint32_t) u;
}
else {
StringTokenizer tok(s2);
while (tok.HasMoreTokens()) {
std::string s(tok.GetNextToken());
if (s == "IN_NO_LOOP")
rEntry.m_fNoLoop = true;
else
rEntry.m_uMask |= InotifyEvent::GetMaskByName(s);
}
}
return true;
}
std::string IncronTabEntry::GetSafePath(const std::string& rPath)
{
std::ostringstream stream;
SIZE len = rPath.length();
for (SIZE i = 0; i < len; i++) {
if (rPath[i] == ' ') {
stream << "\\ ";
}
else if (rPath[i] == '\\') {
stream << "\\\\";
}
else {
stream << rPath[i];
}
}
return stream.str();
}
bool IncronTab::Load(const std::string& rPath)
{
m_tab.clear();
FILE* f = fopen(rPath.c_str(), "r");
if (f == NULL)
return false;
char s[1000];
IncronTabEntry e;
while (fgets(s, 1000, f) != NULL) {
if (IncronTabEntry::Parse(s, e)) {
m_tab.push_back(e);
}
}
fclose(f);
return true;
}
bool IncronTab::Save(const std::string& rPath)
{
FILE* f = fopen(rPath.c_str(), "w");
if (f == NULL)
return false;
std::deque<IncronTabEntry>::iterator it = m_tab.begin();
while (it != m_tab.end()) {
fputs((*it).ToString().c_str(), f);
fputs("\n", f);
it++;
}
fclose(f);
return true;
}
bool IncronTab::CheckUser(const std::string& rUser)
{
char s[100], u[100];
std::string path;
if (!IncronCfg::GetValue("allowed_users", path))
throw InotifyException("configuration is corrupted", EINVAL);
FILE* f = fopen(path.c_str(), "r");
if (f == NULL) {
if (errno == ENOENT) {
if (!IncronCfg::GetValue("denied_users", path))
throw InotifyException("configuration is corrupted", EINVAL);
f = fopen(path.c_str(), "r");
if (f == NULL) {
return errno == ENOENT;
}
while (fgets(s, 100, f) != NULL) {
if (sscanf(s, "%s", u) == 1) {
if (rUser == u) {
fclose(f);
return false;
}
}
}
fclose(f);
return true;
}
return false;
}
while (fgets(s, 100, f) != NULL) {
if (sscanf(s, "%s", u) == 1) {
if (rUser == u) {
fclose(f);
return true;
}
}
}
fclose(f);
return false;
}
std::string IncronTab::GetUserTablePath(const std::string& rUser)
{
std::string s;
if (!IncronCfg::GetValue("user_table_dir", s))
throw InotifyException("configuration is corrupted", EINVAL);
return IncronCfg::BuildPath(s, rUser);
}
std::string IncronTab::GetSystemTablePath(const std::string& rName)
{
std::string s;
if (!IncronCfg::GetValue("system_table_dir", s))
throw InotifyException("configuration is corrupted", EINVAL);
return IncronCfg::BuildPath(s, rName);
}

/incron/tags/incron-0.5.7/incrontab.h
0,0 → 1,233
/// inotify cron table manipulator classes header
/**
* \file incrontab.h
*
* inotify cron system
*
* Copyright (C) 2006, 2007 Lukas Jelinek, <lukas@aiken.cz>
*
* This program is free software; you can use it, redistribute
* it and/or modify it under the terms of the GNU General Public
* License, version 2 (see LICENSE-GPL).
*
*/
#ifndef _INCRONTAB_H_
#define _INCRONTAB_H_
#include <string>
#include <deque>
#include "strtok.h"
/*
/// Incron user table base directory
#define INCRON_USER_TABLE_BASE "/var/spool/incron/"
/// Incron system table base directory
#define INCRON_SYS_TABLE_BASE "/etc/incron.d/"
*/
/// Incron table entry class.
class IncronTabEntry
{
public:
/// Constructor.
/**
* Creates an empty entry for later use with Parse().
*
* \sa Parse()
*/
IncronTabEntry();
/// Constructor.
/**
* Creates an entry based on defined parameters.
*
* \param[in] rPath watched filesystem path
* \param[in] uMask event mask
* \param[in] rCmd command string
*/
IncronTabEntry(const std::string& rPath, uint32_t uMask, const std::string& rCmd);
/// Destructor.
~IncronTabEntry() {}
/// Converts the entry to string representation.
/**
* This method creates a string for use in a table file.
*
* \return string representation
*/
std::string ToString() const;
/// Parses a string and attempts to extract entry parameters.
/**
* \param[in] rStr parsed string
* \param[out] rEntry parametrized entry
* \return true = success, false = failure
*/
static bool Parse(const std::string& rStr, IncronTabEntry& rEntry);
/// Returns the watch filesystem path.
/**
* \return watch path
*/
inline const std::string& GetPath() const
{
return m_path;
}
/// Returns the event mask.
/**
* \return event mask
*/
inline int32_t GetMask() const
{
return m_uMask;
}
/// Returns the command string.
/**
* \return command string
*/
inline const std::string& GetCmd() const
{
return m_cmd;
}
/// Checks whether this entry has set loop-avoidance.
/**
* \return true = no loop, false = loop allowed
*/
inline bool IsNoLoop() const
{
return m_fNoLoop;
}
/// Add backslashes before spaces in the source path.
/**
* It also adds backslashes before all original backslashes
* of course.
*
* The source string is not modified and a copy is returned
* instead.
*
* This method is intended to be used for paths in user tables.
*
* \param[in] rPath path to be modified
* \return modified path
*/
static std::string GetSafePath(const std::string& rPath);
protected:
std::string m_path; ///< watch path
uint32_t m_uMask; ///< event mask
std::string m_cmd; ///< command string
bool m_fNoLoop; ///< no loop yes/no
};
/// Incron table class.
class IncronTab
{
public:
/// Constructor.
IncronTab() {}
/// Destructor.
~IncronTab() {}
/// Add an entry to the table.
/**
* \param[in] rEntry table entry
*/
inline void Add(const IncronTabEntry& rEntry)
{
m_tab.push_back(rEntry);
}
/// Removes all entries.
inline void Clear()
{
m_tab.clear();
}
/// Checks whether the table is empty.
/**
* \return true = empty, false = otherwise
*/
inline bool IsEmpty() const
{
return m_tab.empty();
}
/// Returns the count of entries.
/**
* \return count of entries
*/
inline int GetCount() const
{
return (int) m_tab.size();
}
/// Returns an entry.
/**
* \return reference to the entry for the given index
*
* \attention This method doesn't test index bounds. If you
* pass an invalid value the program may crash
* and/or behave unpredictible way!
*/
inline IncronTabEntry& GetEntry(int index)
{
return m_tab[index];
}
/// Loads the table.
/**
* \param[in] rPath path to a source table file
* \return true = success, false = failure
*/
bool Load(const std::string& rPath);
/// Saves the table.
/**
* \param[in] rPath path to a destination table file
* \return true = success, false = failure
*/
bool Save(const std::string& rPath);
/// Checks whether an user has permission to use incron.
/**
* \param[in] rUser user name
* \return true = permission OK, false = otherwise
*/
static bool CheckUser(const std::string& rUser);
/// Composes a path to an user incron table file.
/**
* \param[in] rUser user name
* \return path to the table file
*
* \attention No tests (existence, permission etc.) are done.
*/
static std::string GetUserTablePath(const std::string& rUser);
/// Composes a path to a system incron table file.
/**
* \param[in] rName table name (pseudouser)
* \return path to the table file
*
* \attention No tests (existence, permission etc.) are done.
*/
static std::string GetSystemTablePath(const std::string& rName);
protected:
std::deque<IncronTabEntry> m_tab; ///< incron table
};
#endif //_INCRONTAB_H_

/incron/tags/incron-0.5.7/appargs.cpp
0,0 → 1,271
/// application arguments processor implementation
/**
* \file appargs.cpp
*
* application arguments processor
*
* Copyright (C) 2007 Lukas Jelinek, <lukas@aiken.cz>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of one of the following licenses:
*
* \li 1. X11-style license (see LICENSE-X11)
* \li 2. GNU Lesser General Public License, version 2.1 (see LICENSE-LGPL)
* \li 3. GNU General Public License, version 2 (see LICENSE-GPL)
*
* If you want to help with choosing the best license for you,
* please visit http://www.gnu.org/licenses/license-list.html.
*
*/
#include "strtok.h"
#include "appargs.h"
size_t AppArgs::s_minCnt = 0;
size_t AppArgs::s_maxCnt = APPARGS_NOLIMIT;
AA_LONG_MAP AppArgs::s_longMap;
AA_SHORT_MAP AppArgs::s_shortMap;
AA_VAL_LIST AppArgs::s_valList;
void AppArgs::Init(size_t valMinCnt, size_t valMaxCnt)
{
s_minCnt = valMinCnt;
s_maxCnt = valMaxCnt;
}
void AppArgs::Destroy()
{
AA_LONG_MAP::iterator it = s_longMap.begin();
while (it != s_longMap.end()) {
delete (*it).second;
it++;
}
s_longMap.clear();
s_shortMap.clear();
s_valList.clear();
}
void AppArgs::Parse(int argc, const char* const* argv)
{
for (int i=1; i<argc; i++) {
// this shouldn't occur
if (argv[i] == NULL)
return;
if (IsOption(argv[i])) {
if (IsLongOption(argv[i])) {
std::string name, val;
bool hasVal;
if (ParseLong(argv[i], name, val, hasVal)) {
AA_LONG_MAP::iterator it = s_longMap.find(name);
if (it != s_longMap.end()) {
AppArgOption_t* pOpt = (*it).second;
pOpt->found = true;
pOpt->hasVal = hasVal;
pOpt->val = val;
}
}
}
else {
char name;
std::string val;
bool hasVal;
ParseShort(argv[i], name, val, hasVal);
AA_SHORT_MAP::iterator it = s_shortMap.find(name);
if (it != s_shortMap.end()) {
AppArgOption_t* pOpt = (*it).second;
pOpt->found = true;
if (hasVal) {
pOpt->hasVal = true;
pOpt->val = val;
}
else {
if (i+1 < argc && !IsOption(argv[i+1])) {
pOpt->hasVal = true;
pOpt->val = argv[i+1];
i++;
}
else {
pOpt->hasVal = false;
}
}
}
}
}
else {
s_valList.push_back(argv[i]);
}
}
}
bool AppArgs::IsValid()
{
size_t size = s_valList.size();
if (size < s_minCnt || size > s_maxCnt)
return false;
AA_LONG_MAP::iterator it = s_longMap.begin();
while (it != s_longMap.end()) {
AppArgOption_t* pOpt = (*it).second;
if (pOpt->mand && !(pOpt->found))
return false;
if (pOpt->type == AAT_MANDATORY_VALUE && pOpt->found && !(pOpt->hasVal))
return false;
it++;
}
return true;
}
bool AppArgs::ExistsOption(const std::string& rArg)
{
AA_LONG_MAP::iterator it = s_longMap.find(rArg);
return it != s_longMap.end() && (*it).second->found;
}
bool AppArgs::GetOption(const std::string& rArg, std::string& rVal)
{
AA_LONG_MAP::iterator it = s_longMap.find(rArg);
if (it == s_longMap.end())
return false;
AppArgOption_t* pOpt = (*it).second;
if (!(pOpt->found) || !(pOpt->hasVal))
return false;
rVal = pOpt->val;
return true;
}
bool AppArgs::AddOption(const std::string& rName, char cShort, AppArgType_t type, bool fMandatory)
{
if (s_longMap.find(rName) != s_longMap.end() || s_shortMap.find(cShort) != s_shortMap.end())
return false;
AppArgOption_t* pOpt = new AppArgOption_t();
pOpt->found = false;
pOpt->hasVal = false;
pOpt->mand = fMandatory;
pOpt->type = type;
s_longMap.insert(AA_LONG_MAP::value_type(rName, pOpt));
s_shortMap.insert(AA_SHORT_MAP::value_type(cShort, pOpt));
return true;
}
size_t AppArgs::GetValueCount()
{
return s_valList.size();
}
bool AppArgs::GetValue(size_t index, std::string& rVal)
{
if (index > s_valList.size())
return false;
rVal = s_valList[index];
return true;
}
void AppArgs::Dump()
{
fprintf(stderr, "Options:\n");
AA_LONG_MAP::iterator it = s_longMap.begin();
while (it != s_longMap.end()) {
AppArgOption_t* pOpt = (*it).second;
AA_SHORT_MAP::iterator it2 = s_shortMap.begin();
while (it2 != s_shortMap.end()) {
if ((*it2).second == pOpt) {
DumpOption((*it).first, (*it2).first, pOpt);
}
it2++;
}
it++;
}
fprintf(stderr, "Values:\n");
AA_VAL_LIST::iterator it3 = s_valList.begin();
while (it3 != s_valList.end()) {
fprintf(stderr, "%s\n", (*it3).c_str());
it3++;
}
}
bool AppArgs::IsOption(const char* pchStr)
{
if (strlen(pchStr) < 2)
return false;
return pchStr[0] == '-';
}
bool AppArgs::IsLongOption(const char* pchStr)
{
return pchStr[1] == '-';
}
bool AppArgs::ParseLong(const char* pchStr, std::string& rName, std::string& rVal, bool& rfHasVal)
{
StringTokenizer tok(pchStr+2, '=');
if (!tok.HasMoreTokens())
return false;
rName = tok.GetNextToken();
if (!tok.HasMoreTokens()) {
rfHasVal = false;
return true;
}
rVal = tok.GetRemainder();
rfHasVal = true;
return true;
}
void AppArgs::ParseShort(const char* pchStr, char& rcName, std::string& rVal, bool& rfHasVal)
{
rcName = pchStr[1];
size_t len = strlen(pchStr);
if (len == 2) {
rfHasVal = false;
return;
}
rVal = pchStr + 2;
rfHasVal = true;
}
void AppArgs::DumpOption(const std::string& rName, char cShort, AppArgOption_t* pOpt)
{
const char* s;
switch (pOpt->type) {
case AAT_NO_VALUE: s = "no value";
break;
case AAT_OPTIONAL_VALUE: s = "optional value";
break;
case AAT_MANDATORY_VALUE: s = "mandatory value";
break;
default:;
s = "unknown";
}
fprintf(stderr, "long='%s', short='%c', type='%s', found=%s, has_value=%s, value='%s'\n",
rName.c_str(),
cShort,
s,
pOpt->found ? "YES" : "NO",
pOpt->hasVal ? "YES" : "NO",
pOpt->val.c_str()
);
}

/incron/tags/incron-0.5.7/inotify-cxx.cpp
0,0 → 1,630
/// inotify C++ interface implementation
/**
* \file inotify-cxx.cpp
*
* inotify C++ interface
*
* Copyright (C) 2006, 2007 Lukas Jelinek <lukas@aiken.cz>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of one of the following licenses:
*
* \li 1. X11-style license (see LICENSE-X11)
* \li 2. GNU Lesser General Public License, version 2.1 (see LICENSE-LGPL)
* \li 3. GNU General Public License, version 2 (see LICENSE-GPL)
*
* If you want to help with choosing the best license for you,
* please visit http://www.gnu.org/licenses/license-list.html.
*
*/
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include "inotify-cxx.h"
/// procfs inotify base path
#define PROCFS_INOTIFY_BASE "/proc/sys/fs/inotify/"
/// dump separator (between particular entries)
#define DUMP_SEP \
({ \
if (!rStr.empty()) { \
rStr.append(","); \
} \
})
int32_t InotifyEvent::GetDescriptor() const
{
return m_pWatch != NULL // if watch exists
? m_pWatch->GetDescriptor() // return its descriptor
: -1; // else return -1
}
uint32_t InotifyEvent::GetMaskByName(const std::string& rName)
{
if (rName == "IN_ACCESS")
return IN_ACCESS;
else if (rName == "IN_MODIFY")
return IN_MODIFY;
else if (rName == "IN_ATTRIB")
return IN_ATTRIB;
else if (rName == "IN_CLOSE_WRITE")
return IN_CLOSE_WRITE;
else if (rName == "IN_CLOSE_NOWRITE")
return IN_CLOSE_NOWRITE;
else if (rName == "IN_OPEN")
return IN_OPEN;
else if (rName == "IN_MOVED_FROM")
return IN_MOVED_FROM;
else if (rName == "IN_MOVED_TO")
return IN_MOVED_TO;
else if (rName == "IN_CREATE")
return IN_CREATE;
else if (rName == "IN_DELETE")
return IN_DELETE;
else if (rName == "IN_DELETE_SELF")
return IN_DELETE_SELF;
else if (rName == "IN_UNMOUNT")
return IN_UNMOUNT;
else if (rName == "IN_Q_OVERFLOW")
return IN_Q_OVERFLOW;
else if (rName == "IN_IGNORED")
return IN_IGNORED;
else if (rName == "IN_CLOSE")
return IN_CLOSE;
else if (rName == "IN_MOVE")
return IN_MOVE;
else if (rName == "IN_ISDIR")
return IN_ISDIR;
else if (rName == "IN_ONESHOT")
return IN_ONESHOT;
else if (rName == "IN_ALL_EVENTS")
return IN_ALL_EVENTS;
#ifdef IN_DONT_FOLLOW
else if (rName == "IN_DONT_FOLLOW")
return IN_DONT_FOLLOW;
#endif // IN_DONT_FOLLOW
#ifdef IN_ONLYDIR
else if (rName == "IN_ONLYDIR")
return IN_ONLYDIR;
#endif // IN_ONLYDIR
#ifdef IN_MOVE_SELF
else if (rName == "IN_MOVE_SELF")
return IN_MOVE_SELF;
#endif // IN_MOVE_SELF
return (uint32_t) 0;
}
void InotifyEvent::DumpTypes(uint32_t uValue, std::string& rStr)
{
rStr = "";
if (IsType(uValue, IN_ALL_EVENTS)) {
rStr.append("IN_ALL_EVENTS");
}
else {
if (IsType(uValue, IN_ACCESS)) {
DUMP_SEP;
rStr.append("IN_ACCESS");
}
if (IsType(uValue, IN_MODIFY)) {
DUMP_SEP;
rStr.append("IN_MODIFY");
}
if (IsType(uValue, IN_ATTRIB)) {
DUMP_SEP;
rStr.append("IN_ATTRIB");
}
if (IsType(uValue, IN_CREATE)) {
DUMP_SEP;
rStr.append("IN_CREATE");
}
if (IsType(uValue, IN_DELETE)) {
DUMP_SEP;
rStr.append("IN_DELETE");
}
if (IsType(uValue, IN_DELETE_SELF)) {
DUMP_SEP;
rStr.append("IN_DELETE_SELF");
}
if (IsType(uValue, IN_OPEN)) {
DUMP_SEP;
rStr.append("IN_OPEN");
}
if (IsType(uValue, IN_CLOSE)) {
DUMP_SEP;
rStr.append("IN_CLOSE");
}
#ifdef IN_MOVE_SELF
if (IsType(uValue, IN_MOVE_SELF)) {
DUMP_SEP;
rStr.append("IN_MOVE_SELF");
}
#endif // IN_MOVE_SELF
else {
if (IsType(uValue, IN_CLOSE_WRITE)) {
DUMP_SEP;
rStr.append("IN_CLOSE_WRITE");
}
if (IsType(uValue, IN_CLOSE_NOWRITE)) {
DUMP_SEP;
rStr.append("IN_CLOSE_NOWRITE");
}
}
if (IsType(uValue, IN_MOVE)) {
DUMP_SEP;
rStr.append("IN_MOVE");
}
else {
if (IsType(uValue, IN_MOVED_FROM)) {
DUMP_SEP;
rStr.append("IN_MOVED_FROM");
}
if (IsType(uValue, IN_MOVED_TO)) {
DUMP_SEP;
rStr.append("IN_MOVED_TO");
}
}
}
if (IsType(uValue, IN_UNMOUNT)) {
DUMP_SEP;
rStr.append("IN_UNMOUNT");
}
if (IsType(uValue, IN_Q_OVERFLOW)) {
DUMP_SEP;
rStr.append("IN_Q_OVERFLOW");
}
if (IsType(uValue, IN_IGNORED)) {
DUMP_SEP;
rStr.append("IN_IGNORED");
}
if (IsType(uValue, IN_ISDIR)) {
DUMP_SEP;
rStr.append("IN_ISDIR");
}
if (IsType(uValue, IN_ONESHOT)) {
DUMP_SEP;
rStr.append("IN_ONESHOT");
}
#ifdef IN_DONT_FOLLOW
if (IsType(uValue, IN_DONT_FOLLOW)) {
DUMP_SEP;
rStr.append("IN_DONT_FOLLOW");
}
#endif // IN_DONT_FOLLOW
#ifdef IN_ONLYDIR
if (IsType(uValue, IN_ONLYDIR)) {
DUMP_SEP;
rStr.append("IN_ONLYDIR");
}
#endif // IN_ONLYDIR
}
void InotifyEvent::DumpTypes(std::string& rStr) const
{
DumpTypes(m_uMask, rStr);
}
void InotifyWatch::SetMask(uint32_t uMask) throw (InotifyException)
{
IN_WRITE_BEGIN
if (m_wd != -1) {
int wd = inotify_add_watch(m_pInotify->GetDescriptor(), m_path.c_str(), uMask);
if (wd != m_wd) {
IN_WRITE_END_NOTHROW
throw InotifyException(IN_EXC_MSG("changing mask failed"), wd == -1 ? errno : EINVAL, this);
}
}
m_uMask = uMask;
IN_WRITE_END
}
void InotifyWatch::SetEnabled(bool fEnabled) throw (InotifyException)
{
IN_WRITE_BEGIN
if (fEnabled == m_fEnabled) {
IN_WRITE_END_NOTHROW
return;
}
if (m_pInotify != NULL) {
if (fEnabled) {
m_wd = inotify_add_watch(m_pInotify->GetDescriptor(), m_path.c_str(), m_uMask);
if (m_wd == -1) {
IN_WRITE_END_NOTHROW
throw InotifyException(IN_EXC_MSG("enabling watch failed"), errno, this);
}
m_pInotify->m_watches.insert(IN_WATCH_MAP::value_type(m_wd, this));
}
else {
if (inotify_rm_watch(m_pInotify->GetDescriptor(), m_wd) != 0) {
IN_WRITE_END_NOTHROW
throw InotifyException(IN_EXC_MSG("disabling watch failed"), errno, this);
}
m_pInotify->m_watches.erase(m_wd);
m_wd = -1;
}
}
m_fEnabled = fEnabled;
IN_WRITE_END
}
void InotifyWatch::__Disable()
{
IN_WRITE_BEGIN
if (!m_fEnabled) {
IN_WRITE_END_NOTHROW
throw InotifyException(IN_EXC_MSG("event cannot occur on disabled watch"), EINVAL, this);
}
if (m_pInotify != NULL) {
m_pInotify->m_watches.erase(m_wd);
m_wd = -1;
}
m_fEnabled = false;
IN_WRITE_END
}
Inotify::Inotify() throw (InotifyException)
{
IN_LOCK_INIT
m_fd = inotify_init();
if (m_fd == -1) {
IN_LOCK_DONE
throw InotifyException(IN_EXC_MSG("inotify init failed"), errno, NULL);
}
}
Inotify::~Inotify()
{
Close();
IN_LOCK_DONE
}
void Inotify::Close()
{
IN_WRITE_BEGIN
if (m_fd != -1) {
RemoveAll();
close(m_fd);
m_fd = -1;
}
IN_WRITE_END
}
void Inotify::Add(InotifyWatch* pWatch) throw (InotifyException)
{
IN_WRITE_BEGIN
// invalid descriptor - this case shouldn't occur - go away
if (m_fd == -1) {
IN_WRITE_END_NOTHROW
throw InotifyException(IN_EXC_MSG("invalid file descriptor"), EBUSY, this);
}
// this path already watched - go away
if (FindWatch(pWatch->GetPath()) != NULL) {
IN_WRITE_END_NOTHROW
throw InotifyException(IN_EXC_MSG("path already watched"), EBUSY, this);
}
// for enabled watch
if (pWatch->IsEnabled()) {
// try to add watch to kernel
int wd = inotify_add_watch(m_fd, pWatch->GetPath().c_str(), pWatch->GetMask());
// adding failed - go away
if (wd == -1) {
IN_WRITE_END_NOTHROW
throw InotifyException(IN_EXC_MSG("adding watch failed"), errno, this);
}
// this path already watched (but defined another way)
InotifyWatch* pW = FindWatch(wd);
if (pW != NULL) {
// try to recover old watch because it may be modified - then go away
if (inotify_add_watch(m_fd, pW->GetPath().c_str(), pW->GetMask()) < 0) {
IN_WRITE_END_NOTHROW
throw InotifyException(IN_EXC_MSG("watch collision detected and recovery failed"), errno, this);
}
else {
// recovery failed - go away
IN_WRITE_END_NOTHROW
throw InotifyException(IN_EXC_MSG("path already watched (but defined another way)"), EBUSY, this);
}
}
pWatch->m_wd = wd;
m_watches.insert(IN_WATCH_MAP::value_type(pWatch->m_wd, pWatch));
}
m_paths.insert(IN_WP_MAP::value_type(pWatch->m_path, pWatch));
pWatch->m_pInotify = this;
IN_WRITE_END
}
void Inotify::Remove(InotifyWatch* pWatch) throw (InotifyException)
{
IN_WRITE_BEGIN
// invalid descriptor - this case shouldn't occur - go away
if (m_fd == -1) {
IN_WRITE_END_NOTHROW
throw InotifyException(IN_EXC_MSG("invalid file descriptor"), EBUSY, this);
}
// for enabled watch
if (pWatch->m_wd != -1) {
// removing watch failed - go away
if (inotify_rm_watch(m_fd, pWatch->m_wd) == -1) {
IN_WRITE_END_NOTHROW
throw InotifyException(IN_EXC_MSG("removing watch failed"), errno, this);
}
m_watches.erase(pWatch->m_wd);
pWatch->m_wd = -1;
}
m_paths.erase(pWatch->m_path);
pWatch->m_pInotify = NULL;
IN_WRITE_END
}
void Inotify::RemoveAll()
{
IN_WRITE_BEGIN
IN_WP_MAP::iterator it = m_paths.begin();
while (it != m_paths.end()) {
InotifyWatch* pW = (*it).second;
if (pW->m_wd != -1) {
inotify_rm_watch(m_fd, pW->m_wd);
pW->m_wd = -1;
}
pW->m_pInotify = NULL;
it++;
}
m_watches.clear();
m_paths.clear();
IN_WRITE_END
}
void Inotify::WaitForEvents(bool fNoIntr) throw (InotifyException)
{
ssize_t len = 0;
do {
len = read(m_fd, m_buf, INOTIFY_BUFLEN);
} while (fNoIntr && len == -1 && errno == EINTR);
if (len == -1 && !(errno == EWOULDBLOCK || errno == EINTR))
throw InotifyException(IN_EXC_MSG("reading events failed"), errno, this);
if (len == -1)
return;
IN_WRITE_BEGIN
ssize_t i = 0;
while (i < len) {
struct inotify_event* pEvt = (struct inotify_event*) &m_buf[i];
InotifyWatch* pW = FindWatch(pEvt->wd);
if (pW != NULL) {
InotifyEvent evt(pEvt, pW);
if ( InotifyEvent::IsType(pW->GetMask(), IN_ONESHOT)
|| InotifyEvent::IsType(evt.GetMask(), IN_IGNORED))
pW->__Disable();
m_events.push_back(evt);
}
i += INOTIFY_EVENT_SIZE + (ssize_t) pEvt->len;
}
IN_WRITE_END
}
bool Inotify::GetEvent(InotifyEvent* pEvt) throw (InotifyException)
{
if (pEvt == NULL)
throw InotifyException(IN_EXC_MSG("null pointer to event"), EINVAL, this);
IN_WRITE_BEGIN
bool b = !m_events.empty();
if (b) {
*pEvt = m_events.front();
m_events.pop_front();
}
IN_WRITE_END
return b;
}
bool Inotify::PeekEvent(InotifyEvent* pEvt) throw (InotifyException)
{
if (pEvt == NULL)
throw InotifyException(IN_EXC_MSG("null pointer to event"), EINVAL, this);
IN_READ_BEGIN
bool b = !m_events.empty();
if (b) {
*pEvt = m_events.front();
}
IN_READ_END
return b;
}
InotifyWatch* Inotify::FindWatch(int iDescriptor)
{
IN_READ_BEGIN
IN_WATCH_MAP::iterator it = m_watches.find(iDescriptor);
InotifyWatch* pW = it == m_watches.end() ? NULL : (*it).second;
IN_READ_END
return pW;
}
InotifyWatch* Inotify::FindWatch(const std::string& rPath)
{
IN_READ_BEGIN
IN_WP_MAP::iterator it = m_paths.find(rPath);
InotifyWatch* pW = it == m_paths.end() ? NULL : (*it).second;
IN_READ_END
return pW;
}
void Inotify::SetNonBlock(bool fNonBlock) throw (InotifyException)
{
IN_WRITE_BEGIN
if (m_fd == -1) {
IN_WRITE_END_NOTHROW
throw InotifyException(IN_EXC_MSG("invalid file descriptor"), EBUSY, this);
}
int res = fcntl(m_fd, F_GETFL);
if (res == -1) {
IN_WRITE_END_NOTHROW
throw InotifyException(IN_EXC_MSG("cannot get inotify flags"), errno, this);
}
if (fNonBlock) {
res |= O_NONBLOCK;
}
else {
res &= ~O_NONBLOCK;
}
if (fcntl(m_fd, F_SETFL, res) == -1) {
IN_WRITE_END_NOTHROW
throw InotifyException(IN_EXC_MSG("cannot set inotify flags"), errno, this);
}
IN_WRITE_END
}
void Inotify::SetCloseOnExec(bool fClOnEx) throw (InotifyException)
{
IN_WRITE_BEGIN
if (m_fd == -1) {
IN_WRITE_END_NOTHROW
throw InotifyException(IN_EXC_MSG("invalid file descriptor"), EBUSY, this);
}
int res = fcntl(m_fd, F_GETFD);
if (res == -1) {
IN_WRITE_END_NOTHROW
throw InotifyException(IN_EXC_MSG("cannot get inotify flags"), errno, this);
}
if (fClOnEx) {
res |= FD_CLOEXEC;
}
else {
res &= ~FD_CLOEXEC;
}
if (fcntl(m_fd, F_SETFD, res) == -1) {
IN_WRITE_END_NOTHROW
throw InotifyException(IN_EXC_MSG("cannot set inotify flags"), errno, this);
}
IN_WRITE_END
}
uint32_t Inotify::GetCapability(InotifyCapability_t cap) throw (InotifyException)
{
FILE* f = fopen(GetCapabilityPath(cap).c_str(), "r");
if (f == NULL)
throw InotifyException(IN_EXC_MSG("cannot get capability"), errno, NULL);
unsigned int val = 0;
if (fscanf(f, "%u", &val) != 1) {
fclose(f);
throw InotifyException(IN_EXC_MSG("cannot get capability"), EIO, NULL);
}
fclose(f);
return (uint32_t) val;
}
void Inotify::SetCapability(InotifyCapability_t cap, uint32_t val) throw (InotifyException)
{
FILE* f = fopen(GetCapabilityPath(cap).c_str(), "w");
if (f == NULL)
throw InotifyException(IN_EXC_MSG("cannot set capability"), errno, NULL);
if (fprintf(f, "%u", (unsigned int) val) <= 0) {
fclose(f);
throw InotifyException(IN_EXC_MSG("cannot set capability"), EIO, NULL);
}
fclose(f);
}
std::string Inotify::GetCapabilityPath(InotifyCapability_t cap) throw (InotifyException)
{
std::string path(PROCFS_INOTIFY_BASE);
switch (cap) {
case IN_MAX_EVENTS:
path.append("max_queued_events");
break;
case IN_MAX_INSTANCES:
path.append("max_user_instances");
break;
case IN_MAX_WATCHES:
path.append("max_user_watches");
break;
default:
throw InotifyException(IN_EXC_MSG("unknown capability type"), EINVAL, NULL);
}
return path;
}

/incron/tags/incron-0.5.7/strtok.cpp
0,0 → 1,142
/// string tokenizer implementation
/**
* \file strtok.cpp
*
* string tokenizer
*
* Copyright (C) 2006, 2007 Lukas Jelinek, <lukas@aiken.cz>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of one of the following licenses:
*
* \li 1. X11-style license (see LICENSE-X11)
* \li 2. GNU Lesser General Public License, version 2.1 (see LICENSE-LGPL)
* \li 3. GNU General Public License, version 2 (see LICENSE-GPL)
*
* If you want to help with choosing the best license for you,
* please visit http://www.gnu.org/licenses/license-list.html.
*
*/
#include <sstream>
#include "strtok.h"
StringTokenizer::StringTokenizer(const std::string& rStr, char cDelim, char cPrefix)
{
m_str = rStr;
m_cDelim = cDelim;
m_cPrefix = cPrefix;
m_pos = 0;
m_len = rStr.length();
}
std::string StringTokenizer::GetNextToken(bool fSkipEmpty)
{
std::string s;
do {
_GetNextToken(s, true);
} while (fSkipEmpty && s.empty() && m_pos < m_len);
return s;
}
std::string StringTokenizer::GetNextTokenRaw(bool fSkipEmpty)
{
std::string s;
do {
_GetNextToken(s, false);
} while (fSkipEmpty && s.empty() && m_pos < m_len);
return s;
}
std::string StringTokenizer::GetRemainder()
{
return m_cPrefix == '\0'
? m_str.substr(m_pos)
: StripPrefix(m_str.c_str() + m_pos, m_len - m_pos);
}
std::string StringTokenizer::StripPrefix(const char* s, SIZE cnt)
{
std::ostringstream stream;
SIZE pos = 0;
while (pos < cnt) {
if (s[pos] == m_cPrefix) {
if ((pos < cnt - 1) && s[pos+1] == m_cPrefix) {
stream << m_cPrefix;
pos++;
}
}
else {
stream << s[pos];
}
pos++;
}
return stream.str();
}
void StringTokenizer::_GetNextToken(std::string& rToken, bool fStripPrefix)
{
if (m_cPrefix == '\0') {
_GetNextTokenNoPrefix(rToken);
}
else {
_GetNextTokenWithPrefix(rToken);
if (fStripPrefix)
rToken = StripPrefix(rToken.c_str(), rToken.length());
}
}
void StringTokenizer::_GetNextTokenNoPrefix(std::string& rToken)
{
const char* s = m_str.c_str();
for (SIZE i=m_pos; i<m_len; i++) {
if (s[i] == m_cDelim) {
rToken = m_str.substr(m_pos, i - m_pos);
m_pos = i + 1;
return;
}
}
rToken = m_str.substr(m_pos);
m_pos = m_len;
}
void StringTokenizer::_GetNextTokenWithPrefix(std::string& rToken)
{
int pref = 0;
const char* s = m_str.c_str();
for (SIZE i=m_pos; i<m_len; i++) {
if (s[i] == m_cDelim) {
if (pref == 0) {
rToken = m_str.substr(m_pos, i - m_pos);
m_pos = i + 1;
return;
}
else {
pref = 0;
}
}
else if (s[i] == m_cPrefix) {
if (pref == 1)
pref = 0;
else
pref = 1;
}
else {
pref = 0;
}
}
rToken = m_str.substr(m_pos);
m_pos = m_len;
}

/incron/tags/incron-0.5.7/LICENSE-X11
0,0 → 1,22
Copyright (c) 2006,2007 Lukas Jelinek
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

/incron/tags/incron-0.5.7/TODO
0,0 → 1,3
Currently pending tasks:
* recursive monitoring (whole subtrees)

/incron/tags/incron-0.5.7/COPYING
0,0 → 1,11
inotify cron system
Copyright (C) 2006,2007 Lukas Jelinek, <lukas@aiken.cz>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License,
version 2 (see LICENSE-GPL).
The program uses some parts covered also by other licenses.
Please look into the source files for detailed information.

/incron/tags/incron-0.5.7/strtok.h
0,0 → 1,231
/// string tokenizer header
/**
* \file strtok.h
*
* string tokenizer
*
* Copyright (C) 2006 Lukas Jelinek, <lukas@aiken.cz>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of one of the following licenses:
*
* \li 1. X11-style license (see LICENSE-X11)
* \li 2. GNU Lesser General Public License, version 2.1 (see LICENSE-LGPL)
* \li 3. GNU General Public License, version 2 (see LICENSE-GPL)
*
* If you want to help with choosing the best license for you,
* please visit http://www.gnu.org/licenses/license-list.html.
*
*/
#ifndef _STRTOK_H_
#define _STRTOK_H_
#include <string>
typedef std::string::size_type SIZE;
/// Simple string tokenizer class.
/**
* This class implements a string tokenizer. It splits a string
* by a character to a number of elements (tokens) which are
* provided sequentially.
*
* All operations are made on a copy of the original string
* (which may be in fact a copy-on-write instance).
*
* The original string is left unchanged. All tokens are returned
* as newly created strings.
*
* There is possibility to specify a prefix character which
* causes the consecutive character is not considered as
* a delimiter. If you don't specify this character (or specify
* the NUL character, 0x00) this feature is disabled. The mostly
* used prefix is a backslash ('\').
*
* This class is not thread-safe.
*
* Performance note: This class is currently not intended
* to be very fast. Speed optimizations will be done later.
*/
class StringTokenizer
{
public:
/// Constructor.
/**
* Creates a ready-to-use tokenizer.
*
* \param[in] rStr string for tokenizing
* \param[in] cDelim delimiter (separator) character
* \param[in] cPrefix character which is prepended if a
* character must not separate tokens
*/
StringTokenizer(const std::string& rStr, char cDelim = ',', char cPrefix = '\0');
/// Destructor.
~StringTokenizer() {}
/// Checks whether the tokenizer can provide more tokens.
/**
* \return true = more tokens available, false = otherwise
*/
inline bool HasMoreTokens() const
{
return m_pos < m_len;
}
/// Returns the next token.
/**
* If a prefix is defined it is stripped from the returned
* string (e.g. 'abc\ def' is transformed to 'abc def'
* while the prefix is '\').
*
* \param[in] fSkipEmpty skip empty strings (more consecutive delimiters)
* \return next token or "" if no more tokens available
*
* \sa GetNextTokenRaw()
*/
std::string GetNextToken(bool fSkipEmpty = false);
/// Returns the next token.
/**
* This method always returns an unmodified string even
* if it contains prefix characters.
*
* \param[in] fSkipEmpty skip empty strings (more consecutive delimiters)
* \return next token or "" if no more tokens available
*
* \sa GetNextToken()
*/
std::string GetNextTokenRaw(bool fSkipEmpty = false);
/// Returns the remainder of the source string.
/**
* This method returns everything what has not been
* processed (tokenized) yet and moves the current
* position to the end of the string.
*
* If a prefix is defined it is stripped from
* the returned string.
*
* \return remainder string
*/
std::string GetRemainder();
/// Sets a delimiter (separator) character.
/**
* The new delimiter has effect only to tokens returned later;
* the position in the string is not affected.
*
* If you specify a NUL character (0x00) here the prefix
* will not be used.
*
* \param[in] cDelim delimiter character
*/
inline void SetDelimiter(char cDelim)
{
m_cDelim = cDelim;
}
/// Returns the delimiter (separator) character.
/**
* \return delimiter character
*/
inline char GetDelimiter() const
{
return m_cDelim;
}
/// Sets a prefix character.
/**
* The new prefix has effect only to tokens returned later;
* the position in the string is not affected.
*
* \param[in] cPrefix prefix character
*
* \sa SetNoPrefix()
*/
inline void SetPrefix(char cPrefix)
{
m_cPrefix = cPrefix;
}
/// Returns the prefix character.
/**
* \return prefix character
*/
inline char GetPrefix() const
{
return m_cPrefix;
}
/// Sets the prefix to 'no prefix'.
/**
* Calling this method is equivalent to SetPrefix((char) 0).
*
* \sa SetPrefix()
*/
inline void SetNoPrefix()
{
SetPrefix('\0');
}
/// Resets the tokenizer.
/**
* Re-initializes tokenizing to the start of the string.
*/
inline void Reset()
{
m_pos = 0;
}
private:
std::string m_str; ///< tokenized string
char m_cDelim; ///< delimiter character
char m_cPrefix; ///< prefix character
std::string::size_type m_pos; ///< current position
std::string::size_type m_len; ///< string length
/// Strips all prefix characters.
/**
* \param[in] s source string
* \param[in] cnt string length
* \return modified string
*/
std::string StripPrefix(const char* s, SIZE cnt);
/// Extracts the next token (internal method).
/**
* The extracted token may be empty.
*
* \param[out] rToken extracted token
* \param[in] fStripPrefix strip prefix characters yes/no
*/
void _GetNextToken(std::string& rToken, bool fStripPrefix);
/// Extracts the next token (internal method).
/**
* This method does no checking about the prefix character.
*
* The extracted token may be empty.
*
* \param[out] rToken extracted token
*/
void _GetNextTokenNoPrefix(std::string& rToken);
/// Extracts the next token (internal method).
/**
* This method does checking about the prefix character.
*
* The extracted token may be empty.
*
* \param[out] rToken extracted token
*/
void _GetNextTokenWithPrefix(std::string& rToken);
};
#endif //_STRTOK_H_

/incron/tags/incron-0.5.7/LICENSE-LGPL
0,0 → 1,504
GNU LESSER GENERAL PUBLIC LICENSE
Version 2.1, February 1999
Copyright (C) 1991, 1999 Free Software Foundation, Inc.
51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
[This is the first released version of the Lesser GPL. It also counts
as the successor of the GNU Library Public License, version 2, hence
the version number 2.1.]
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
Licenses are intended to guarantee your freedom to share and change
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This license, the Lesser General Public License, applies to some
specially designated software packages--typically libraries--of the
Free Software Foundation and other authors who decide to use it. You
can use it too, but we suggest you first think carefully about whether
this license or the ordinary General Public License is the better
strategy to use in any particular case, based on the explanations below.
When we speak of free software, we are referring to freedom of use,
not price. Our General Public Licenses are designed to make sure that
you have the freedom to distribute copies of free software (and charge
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it if you want it; that you can change the software and use pieces of
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To protect your rights, we need to make restrictions that forbid
distributors to deny you these rights or to ask you to surrender these
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This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.
12. If the distribution and/or use of the Library is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Library under this License may add
an explicit geographical distribution limitation excluding those countries,
so that distribution is permitted only in or among countries not thus
excluded. In such case, this License incorporates the limitation as if
written in the body of this License.
13. The Free Software Foundation may publish revised and/or new
versions of the Lesser General Public License from time to time.
Such new versions will be similar in spirit to the present version,
but may differ in detail to address new problems or concerns.
Each version is given a distinguishing version number. If the Library
specifies a version number of this License which applies to it and
"any later version", you have the option of following the terms and
conditions either of that version or of any later version published by
the Free Software Foundation. If the Library does not specify a
license version number, you may choose any version ever published by
the Free Software Foundation.
14. If you wish to incorporate parts of the Library into other free
programs whose distribution conditions are incompatible with these,
write to the author to ask for permission. For software which is
copyrighted by the Free Software Foundation, write to the Free
Software Foundation; we sometimes make exceptions for this. Our
decision will be guided by the two goals of preserving the free status
of all derivatives of our free software and of promoting the sharing
and reuse of software generally.
NO WARRANTY
15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Libraries
If you develop a new library, and you want it to be of the greatest
possible use to the public, we recommend making it free software that
everyone can redistribute and change. You can do so by permitting
redistribution under these terms (or, alternatively, under the terms of the
ordinary General Public License).
To apply these terms, attach the following notices to the library. It is
safest to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least the
"copyright" line and a pointer to where the full notice is found.
<one line to give the library's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Also add information on how to contact you by electronic and paper mail.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the library, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the
library `Frob' (a library for tweaking knobs) written by James Random Hacker.
<signature of Ty Coon>, 1 April 1990
Ty Coon, President of Vice
That's all there is to it!