1 /*****************************************************************************
2 * vlc.c: the VLC player
3 *****************************************************************************
4 * Copyright (C) 1998-2008 the VideoLAN team
7 * Authors: Vincent Seguin <seguin@via.ecp.fr>
8 * Samuel Hocevar <sam@zoy.org>
9 * Gildas Bazin <gbazin@videolan.org>
10 * Derk-Jan Hartman <hartman at videolan dot org>
11 * Lots of other people, see the libvlc AUTHORS file
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
26 *****************************************************************************/
48 # define pthread_t int
49 # define pthread_self() _gettid()
54 extern void LocaleFree (const char *);
55 extern char *FromLocale (const char *);
56 extern void vlc_enable_override (void);
59 static void dummy_handler (int signum)
65 static bool signal_ignored (int signum)
69 if (sigaction (signum, NULL, &sa))
71 return ((sa.sa_flags & SA_SIGINFO)
72 ? (void *)sa.sa_sigaction : (void *)sa.sa_handler) == SIG_IGN;
75 static void vlc_kill (void *data)
80 pthread_kill (*ps, SIGTERM);
82 // send a signal to the main thread
83 kill (getpid(), SIGTERM);
87 static void exit_timeout (int signum)
90 signal (SIGINT, SIG_DFL);
93 /*****************************************************************************
94 * main: parse command line, start interface and spawn threads.
95 *****************************************************************************/
96 int main( int i_argc, const char *ppsz_argv[] )
98 /* The so-called POSIX-compliant MacOS X reportedly processes SIGPIPE even
99 * if it is blocked in all thread.
100 * Note: this is NOT an excuse for not protecting against SIGPIPE. If
101 * LibVLC runs outside of VLC, we cannot rely on this code snippet. */
102 signal (SIGPIPE, SIG_IGN);
103 /* Restore SIGCHLD in case our parent process ignores it. */
104 signal (SIGCHLD, SIG_DFL);
107 /* Activate malloc checking routines to detect heap corruptions. */
108 setenv ("MALLOC_CHECK_", "2", 1);
110 /* Disable the ugly Gnome crash dialog so that we properly segfault */
111 setenv ("GNOME_DISABLE_CRASH_DIALOG", "1", 1);
115 setenv ("VLC_PLUGIN_PATH", TOP_BUILDDIR"/modules", 1);
118 /* Clear the X.Org startup notification ID. Otherwise the UI might try to
119 * change the environment while the process is multi-threaded. That could
120 * crash. Screw you X.Org. Next time write a thread-safe specification. */
121 unsetenv ("DESKTOP_STARTUP_ID");
123 #ifndef ALLOW_RUN_AS_ROOT
126 fprintf (stderr, "VLC is not supposed to be run as root. Sorry.\n"
127 "If you need to use real-time priorities and/or privileged TCP ports\n"
128 "you can use %s-wrapper (make sure it is Set-UID root and\n"
129 "cannot be run by non-trusted users first).\n", ppsz_argv[0]);
134 setlocale (LC_ALL, "");
136 if (isatty (STDERR_FILENO))
137 /* This message clutters error logs. It is printed only on a TTY.
138 * Fortunately, LibVLC prints version info with -vv anyway. */
139 fprintf (stderr, "VLC media player %s (revision %s)\n",
140 libvlc_get_version(), libvlc_get_changeset());
145 /* VLC uses sigwait() to dequeue interesting signals.
146 * For this to work, those signals must be blocked in all threads,
147 * including the thread calling sigwait() (see the man page for details).
149 * There are two advantages to sigwait() over traditional signal handlers:
150 * - delivery is synchronous: no need to worry about async-safety,
151 * - EINTR is not generated: other threads need not handle that error.
152 * That being said, some LibVLC programs do not use sigwait(). Therefore
153 * EINTR must still be handled cleanly, notably from poll() calls.
155 * Signals that request a clean shutdown, and force an unclean shutdown
156 * if they are triggered again 2+ seconds later.
157 * We have to handle SIGTERM cleanly because of daemon mode. */
158 sigaddset (&set, SIGINT);
159 sigaddset (&set, SIGHUP);
160 sigaddset (&set, SIGQUIT);
161 sigaddset (&set, SIGTERM);
163 /* SIGPIPE can happen and would crash the process. On modern systems,
164 * the MSG_NOSIGNAL flag protects socket write operations against SIGPIPE.
165 * But we still need to block SIGPIPE when:
166 * - writing to pipes,
167 * - using write() instead of send() for code not specific to sockets.
168 * LibVLC code assumes that SIGPIPE is blocked. Other LibVLC applications
169 * shall block it (or handle it somehow) too.
171 sigaddset (&set, SIGPIPE);
173 /* SIGCHLD must be dequeued to clean up zombie child processes.
174 * Furthermore the handler must not be set to SIG_IGN (see above).
175 * We cannot pragmatically handle EINTR, short reads and short writes
176 * in every code paths (including underlying libraries). So we just
177 * block SIGCHLD in all threads, and dequeue it below. */
178 sigaddset (&set, SIGCHLD);
181 sigaddset (&set, SIGRTMIN);
183 struct sigaction act = { .sa_handler = dummy_handler, };
184 sigaction (SIGRTMIN, &act, NULL);
187 /* Block all these signals */
188 pthread_sigmask (SIG_SETMASK, &set, NULL);
190 /* Note that FromLocale() can be used before libvlc is initialized */
191 const char *argv[i_argc + 3];
194 argv[argc++] = "--no-ignore-config";
195 argv[argc++] = "--media-library";
197 argv[argc++] = FromLocale ("--data-path="TOP_SRCDIR"/share");
202 /* When VLC.app is run by double clicking in Mac OS X, the 2nd arg
203 * is the PSN - process serial number (a unique PID-ish thingie)
204 * still ok for real Darwin & when run from command line
205 * for example -psn_0_9306113 */
206 if(i_argc >= 2 && !strncmp( ppsz_argv[1] , "-psn" , 4 ))
209 for (; i < i_argc; i++)
210 if ((argv[argc++] = FromLocale (ppsz_argv[i])) == NULL)
214 vlc_enable_override ();
216 /* Initialize libvlc */
217 libvlc_instance_t *vlc = libvlc_new (argc, argv);
221 libvlc_set_user_agent (vlc, "VLC media player", "VLC/"PACKAGE_VERSION);
223 #if !defined (HAVE_MAEMO) && !defined __APPLE__ && !defined (__OS2__)
224 libvlc_add_intf (vlc, "globalhotkeys,none");
226 if (libvlc_add_intf (vlc, NULL))
229 libvlc_playlist_play (vlc, -1, 0, NULL);
231 /* Wait for a termination signal */
232 pthread_t self = pthread_self ();
233 libvlc_set_exit_handler (vlc, vlc_kill, &self);
235 /* Qt4 insists on catching SIGCHLD via signal handler. To work around that,
236 * unblock it after all our child threads are created. */
237 sigdelset (&set, SIGCHLD);
238 pthread_sigmask (SIG_SETMASK, &set, NULL);
240 /* Do not dequeue SIGHUP if it is ignored (nohup) */
241 if (signal_ignored (SIGHUP))
242 sigdelset (&set, SIGHUP);
244 sigdelset (&set, SIGPIPE);
247 sigwait (&set, &signum);
249 /* Restore default signal behaviour after 3 seconds */
251 sigaddset (&set, SIGINT);
252 sigaddset (&set, SIGALRM);
253 signal (SIGINT, SIG_IGN);
254 signal (SIGALRM, exit_timeout);
255 pthread_sigmask (SIG_UNBLOCK, &set, NULL);
261 libvlc_release (vlc);
262 for (int i = 2; i < argc; i++)
263 LocaleFree (argv[i]);