Rev 47 | Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 45 | luk | 1 | |
| 2 | /// inotify cron daemon main file |
||
| 3 | /** |
||
| 4 | * \file icd-main.cpp |
||
| 5 | * |
||
| 6 | * inotify cron system |
||
| 7 | * |
||
| 8 | * Copyright (C) 2006 Lukas Jelinek, <lukas@aiken.cz> |
||
| 9 | * |
||
| 10 | * This program is free software; you can use it, redistribute |
||
| 11 | * it and/or modify it under the terms of the GNU General Public |
||
| 12 | * License, version 2 (see LICENSE-GPL). |
||
| 13 | * |
||
| 14 | */ |
||
| 15 | |||
| 16 | #include <map> |
||
| 17 | #include <signal.h> |
||
| 18 | #include <wait.h> |
||
| 19 | #include <pwd.h> |
||
| 20 | #include <dirent.h> |
||
| 21 | #include <syslog.h> |
||
| 22 | #include <errno.h> |
||
| 23 | |||
| 24 | #include "inotify-cxx.h" |
||
| 25 | #include "incrontab.h" |
||
| 26 | |||
| 27 | #include "usertable.h" |
||
| 28 | |||
| 29 | #define DAEMON false |
||
| 30 | |||
| 31 | #define INCRON_APP_NAME "incrond" |
||
| 32 | #define INCRON_LOG_OPTS (LOG_CONS | LOG_PID) |
||
| 33 | #define INCRON_LOG_FACIL LOG_CRON |
||
| 34 | |||
| 35 | |||
| 36 | typedef std::map<std::string, UserTable*> SUT_MAP; |
||
| 37 | |||
| 38 | |||
| 39 | SUT_MAP g_ut; |
||
| 40 | |||
| 41 | bool g_fFinish = false; |
||
| 42 | |||
| 43 | |||
| 44 | void on_signal(int signo) |
||
| 45 | { |
||
| 46 | g_fFinish = true; |
||
| 47 | } |
||
| 48 | |||
| 49 | void on_child(int signo) |
||
| 50 | { |
||
| 51 | wait(NULL); |
||
| 52 | } |
||
| 53 | |||
| 54 | bool check_user(const char* user) |
||
| 55 | { |
||
| 56 | struct passwd* pw = getpwnam(user); |
||
| 57 | if (pw == NULL) |
||
| 58 | return false; |
||
| 59 | |||
| 60 | return InCronTab::CheckUser(user); |
||
| 61 | } |
||
| 62 | |||
| 63 | bool load_tables(Inotify* pIn, EventDispatcher* pEd) |
||
| 64 | { |
||
| 65 | DIR* d = opendir(INCRON_TABLE_BASE); |
||
| 66 | if (d == NULL) { |
||
| 67 | syslog(LOG_CRIT, "cannot open table directory: %s", strerror(errno)); |
||
| 68 | return false; |
||
| 69 | } |
||
| 70 | |||
| 71 | syslog(LOG_NOTICE, "loading user tables"); |
||
| 72 | |||
| 73 | struct dirent* pDe = NULL; |
||
| 74 | while ((pDe = readdir(d)) != NULL) { |
||
| 75 | std::string un(pDe->d_name); |
||
| 76 | if (pDe->d_type == DT_REG && un != "." && un != "..") { |
||
| 77 | if (check_user(pDe->d_name)) { |
||
| 78 | syslog(LOG_INFO, "loading table for user %s", pDe->d_name); |
||
| 79 | UserTable* pUt = new UserTable(pIn, pEd, un); |
||
| 80 | g_ut.insert(SUT_MAP::value_type(un, pUt)); |
||
| 81 | pUt->Load(); |
||
| 82 | } |
||
| 83 | else { |
||
| 84 | syslog(LOG_WARNING, "table for invalid user %s found (ignored)", pDe->d_name); |
||
| 85 | } |
||
| 86 | } |
||
| 87 | } |
||
| 88 | |||
| 89 | closedir(d); |
||
| 90 | return true; |
||
| 91 | } |
||
| 92 | |||
| 93 | int main(int argc, char** argv) |
||
| 94 | { |
||
| 95 | openlog(INCRON_APP_NAME, INCRON_LOG_OPTS, INCRON_LOG_FACIL); |
||
| 96 | |||
| 97 | syslog(LOG_NOTICE, "starting service"); |
||
| 98 | |||
| 99 | Inotify in; |
||
| 100 | EventDispatcher ed(&in); |
||
| 101 | |||
| 102 | if (!load_tables(&in, &ed)) { |
||
| 103 | closelog(); |
||
| 104 | return 1; |
||
| 105 | } |
||
| 106 | |||
| 107 | signal(SIGTERM, on_signal); |
||
| 108 | signal(SIGINT, on_signal); |
||
| 109 | |||
| 110 | signal(SIGCHLD, on_child); |
||
| 111 | |||
| 112 | if (DAEMON) |
||
| 113 | daemon(0, 0); |
||
| 114 | |||
| 115 | uint32_t wm = IN_CLOSE_WRITE | IN_DELETE | IN_MOVE | IN_DELETE_SELF | IN_UNMOUNT; |
||
| 116 | InotifyWatch watch(INCRON_TABLE_BASE, wm); |
||
| 117 | in.Add(watch); |
||
| 118 | |||
| 119 | syslog(LOG_NOTICE, "ready to process filesystem events"); |
||
| 120 | |||
| 121 | InotifyEvent e; |
||
| 122 | |||
| 123 | while (!g_fFinish) { |
||
| 124 | if (in.WaitForEvents()) { |
||
| 125 | while (in.GetEvent(e)) { |
||
| 126 | |||
| 127 | std::string s; |
||
| 128 | e.DumpTypes(s); |
||
| 129 | //syslog(LOG_DEBUG, "EVENT: wd=%i, cookie=%u, name=%s, mask: %s", (int) e.GetDescriptor(), (unsigned) e.GetCookie(), e.GetName().c_str(), s.c_str()); |
||
| 130 | |||
| 131 | if (e.GetWatch() == &watch) { |
||
| 132 | if (e.IsType(IN_DELETE_SELF) || e.IsType(IN_UNMOUNT)) { |
||
| 133 | syslog(LOG_CRIT, "base directory destroyed, exitting"); |
||
| 134 | g_fFinish = true; |
||
| 135 | } |
||
| 136 | else if (!e.GetName().empty()) { |
||
| 137 | SUT_MAP::iterator it = g_ut.find(e.GetName()); |
||
| 138 | if (it != g_ut.end()) { |
||
| 139 | UserTable* pUt = (*it).second; |
||
| 140 | if (e.IsType(IN_CLOSE_WRITE) || e.IsType(IN_MOVED_TO)) { |
||
| 141 | syslog(LOG_INFO, "table for user %s changed, reloading", e.GetName().c_str()); |
||
| 142 | pUt->Dispose(); |
||
| 143 | pUt->Load(); |
||
| 144 | } |
||
| 145 | else if (e.IsType(IN_MOVED_FROM) || e.IsType(IN_DELETE)) { |
||
| 146 | syslog(LOG_INFO, "table for user %s destroyed, removing", e.GetName().c_str()); |
||
| 147 | delete pUt; |
||
| 148 | g_ut.erase(it); |
||
| 149 | } |
||
| 150 | } |
||
| 151 | else if (e.IsType(IN_CLOSE_WRITE) || e.IsType(IN_MOVED_TO)) { |
||
| 152 | if (check_user(e.GetName().c_str())) { |
||
| 153 | syslog(LOG_INFO, "table for user %s created, loading", e.GetName().c_str()); |
||
| 154 | UserTable* pUt = new UserTable(&in, &ed, e.GetName()); |
||
| 155 | g_ut.insert(SUT_MAP::value_type(e.GetName(), pUt)); |
||
| 156 | pUt->Load(); |
||
| 157 | } |
||
| 158 | } |
||
| 159 | } |
||
| 160 | } |
||
| 161 | else { |
||
| 162 | ed.DispatchEvent(e); |
||
| 163 | } |
||
| 164 | } |
||
| 165 | } |
||
| 166 | } |
||
| 167 | |||
| 168 | syslog(LOG_NOTICE, "stopping service"); |
||
| 169 | |||
| 170 | closelog(); |
||
| 171 | |||
| 172 | return 0; |
||
| 173 | } |