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/inotify-cxx/tags/inotify-cxx-0.7.4/inotify-cxx.cpp
0,0 → 1,643
 
/// inotify C++ interface implementation
/**
* \file inotify-cxx.cpp
*
* inotify C++ interface
*
* Copyright (C) 2006, 2007, 2009, 2012 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.
*
* Credits:
* Mike Frysinger (cleanup of includes)
* Christian Ruppert (new include to build with GCC 4.4+)
*
*/
 
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <fstream>
#include <cstdio>
 
#include <sys/syscall.h>
 
// Use this if syscalls not defined
#ifndef __NR_inotify_init
#include <sys/inotify-syscalls.h>
#endif // __NR_inotify_init
 
#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;
}
 
/inotify-cxx/tags/inotify-cxx-0.7.4/CHANGELOG
0,0 → 1,101
0.7.4 2012-04-05
* new includes to build with GCC 4.4 and newer
 
0.7.3 2009-12-09
* cleanup of includes
 
0.7.2 2007-04-18
* added #include <stdint.h> (required for Debian Sarge, #0000155)
 
0.7.1 2007-01-20
* incorrect event name handling fixed (#0000135)
 
0.7.0 2007-01-13
* added Inotify::SetCloseOnExec() for simple setting this feature
 
 
0.6.3 2007-01-06
* incorrect behavior for IN_IGNORED fixed (#0000124)
 
 
0.6.2 2007-01-03
* bad IN_MOVE_SELF dumping in IN_ALL_EVENTS fixed (#0000118)
 
 
0.6.1 2006-12-30
* fixed incorrect behavior for IN_ONESHOT (#0000113)
 
 
0.6.0 2006-12-28
* added methods for getting/setting inotify capabilities and limits
* added IN_SELF_MOVED flag (if defined)
* added Inotify::IsRecursive() for identifying recursive watches
(will be implemented in future versions)
 
0.5.3 2006-12-06
* fixed incorrect error handling in WaitForEvents()
 
 
0.5.2 2006-11-12
* problem with ignoring IN_OPEN has been fixed (#0000102)
 
 
0.5.1 2006-11-10
* problems with includes have been fixed (#0000099)
 
 
0.5.0 2006-10-29
* partial thread safety has been implemented (using rwlocks)
* Inotify::GetEnabledCount() method has been added
 
 
0.4.1 2006-10-14
* wrong value returned by Inotify::GetWatchCount() has been fixed
(#0000092)
 
0.4.0 2006-10-13
* two additional flags (IN_ONLYDIR and IN_DONT_FOLLOW) may be used
if available (#0000086)
* "errorneous" multiple watches on the same path are no longer
possible (#0000087)
* tarball structure has been fixed (#0000088)
* inotify-syscalls.h is included only if inotify.h doesn't contain
syscall definitions (#0000090)
* enabling/disabling is now done through watch presence in the kernel
instead of dropping events (#0000091)
* InotifyWatch::SetMask() method has been added to allow later mask
modification
 
 
0.3.1 2006-10-03
* fixed: wrong behavior for EWOULDBLOCK (Inotify::WaitForEvents())
 
 
0.3.0 2006-10-03
* all errors now handled using exceptions (InotifyException)
* InotifyEvent no longer use struct inotity_event as its
internal data structure
* removed InotifyEvent::GetData() - internal data changed
* removed Inotify::IsReady() - no longer necessary
* added Inotify::GetDescriptor() - returns inotify file descriptor
* added Inotify::SetNonBlock() - switches nonblocking mode on/off
* added possibility to enable/disable watches
* some code cleanups
 
 
0.2.0 2006-09-15
* InotifyEvent now contains a pointer to the source InotifyWatch
* fixed: InotifyEvent::IsType() - it now handles the mask correctly
* added a static method (InotifyEvent::GetMaskByName()) for finding a mask
for a name
* added a static version of InotifyEvent::DumpTypes() method
* added a static version of InotifyEvent::IsType() method
* dumped types (InotifyEvent::DumpTypes()) now separated by commas
instead of spaces
* InotifyEvent::DumpTypes() methods now use as general types as possible
* InotifyWatch now contains a pointer to the related Inotify
 
 
0.1.0 2006-09-04
first alpha version
/inotify-cxx/tags/inotify-cxx-0.7.4/COPYING
0,0 → 1,13
inotify C++ interface
Copyright (C) 2006, 2007, 2009, 2012 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:
 
1. X11 license (see LICENSE-X11)
2. GNU Lesser General Public License, version 2.1 (see LICENSE-LGPL)
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.
/inotify-cxx/tags/inotify-cxx-0.7.4/LICENSE-X11
0,0 → 1,22
Copyright (c) 2006, 2007, 2009, 2012 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.
/inotify-cxx/tags/inotify-cxx-0.7.4/README
0,0 → 1,70
 
inotify C++ interface
 
(c) Lukas Jelinek, 2006, 2007, 2009, 2012
 
1. About
2. Requirements
3. How to use
4. Bugs, suggestions
5. Licensing
6. Documentation
 
 
========================================================================
 
 
1. About
This program is the inotify C++ interface. It is designed for easy use
of Linux inotify technology in C++ applications. You need not to deal
with file descriptors and such uncomfortable things. Instead you can
use a few simple C++ classes.
 
 
2. Requirements
* Linux kernel 2.6.13 or later (with inotify compiled in)
* inotify header(s) installed in <INCLUDE_DIR>/sys. The most common
place is /usr/include/sys. Some Linux distributions contain only
inotify.h which defines everything needed. But sometimes must
be used inotify.h and inotify-syscalls.h as available e.g. at
the inotify-cxx homepage.
* GCC 4.x compiler (probably works also with GCC 3.4, possibly with
older versions too)
 
3. How to use
Include inotify-cxx.h into your sources and add inotify-cxx.cpp for
compiling (e.g. through your makefile).
 
If you have installed it into your system-wide include dir (e.g.
/usr/include), use #include <inotify-cxx.h> or similar.
Otherwise use #include "inotify-cxx.h".
 
For thread-safe behavior, define the INOTIFY_THREAD_SAFE symbol
(eg. -DINOTIFY_THREAD_SAFE on gcc's command line). See documentation
for details about thread safety.
 
 
4. 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.
 
 
5. Licensing
This program is free software; you can redistribute it and/or
modify it under the terms of one of the following licenses:
 
1. X11 license (see LICENSE-X11)
2. GNU Lesser General Public License, version 2.1 (see LICENSE-LGPL)
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.
 
 
6. Documentation
The API reference documentation is present in the HTML and man format.
It was generated using the doxygen program.
/inotify-cxx/tags/inotify-cxx-0.7.4/inotify-cxx.h
0,0 → 1,887
 
/// inotify C++ interface header
/**
* \file inotify-cxx.h
*
* inotify C++ interface
*
* Copyright (C) 2006, 2007, 2009 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.
*
* Credits:
* Mike Frysinger (cleanup of includes)
*
*/
 
 
 
 
 
#ifndef _INOTIFYCXX_H_
#define _INOTIFYCXX_H_
 
#include <stdint.h>
#include <string>
#include <deque>
#include <map>
 
// Please ensure that the following header file takes the right place
#include <sys/inotify.h>
 
 
/// 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_
 
/inotify-cxx/tags/inotify-cxx-0.7.4/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
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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
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Finally, any free program is threatened constantly by software
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The precise terms and conditions for copying, distribution and
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GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
 
0. This License applies to any program or other work which contains
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that is to say, a work containing the Program or a portion of it,
either verbatim or with modifications and/or translated into another
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the term "modification".) Each licensee is addressed as "you".
 
Activities other than copying, distribution and modification are not
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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
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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
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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
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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
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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
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However, parties who have received copies, or rights, from you under
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8. If the distribution and/or use of the Program is restricted in
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original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
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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
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Each version is given a distinguishing version number. If the Program
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10. If you wish to incorporate parts of the Program into other free
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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
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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.
 
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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
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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.
/inotify-cxx/tags/inotify-cxx-0.7.4/TODO
0,0 → 1,3
Currently pending tasks:
 
* recursive watches (for watching whole directory subtrees)
/inotify-cxx/tags/inotify-cxx-0.7.4/LICENSE-LGPL
0,0 → 1,504
GNU LESSER GENERAL PUBLIC LICENSE
Version 2.1, February 1999
 
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Everyone is permitted to copy and distribute verbatim copies
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[This is the first released version of the Lesser GPL. It also counts
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Preamble
 
The licenses for most software are designed to take away your
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If any portion of this section is held invalid or unenforceable under any
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This section is intended to make thoroughly clear what is believed to
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12. If the distribution and/or use of the Library is restricted in
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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
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14. If you wish to incorporate parts of the Library into other free
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NO WARRANTY
 
15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
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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!