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 *****************************************************************************/
49 extern void LocaleFree (const char *);
50 extern char *FromLocale (const char *);
51 extern void vlc_enable_override (void);
54 static void dummy_handler (int signum)
60 static bool signal_ignored (int signum)
64 if (sigaction (signum, NULL, &sa))
66 return ((sa.sa_flags & SA_SIGINFO)
67 ? (void *)sa.sa_sigaction : (void *)sa.sa_handler) == SIG_IGN;
70 static void vlc_kill (void *data)
74 pthread_kill (*ps, SIGTERM);
77 static void exit_timeout (int signum)
80 signal (SIGINT, SIG_DFL);
83 /*****************************************************************************
84 * main: parse command line, start interface and spawn threads.
85 *****************************************************************************/
86 int main( int i_argc, const char *ppsz_argv[] )
88 /* The so-called POSIX-compliant MacOS X reportedly processes SIGPIPE even
89 * if it is blocked in all thread. Also some libraries want SIGPIPE blocked
90 * as they have no clue about signal masks.
91 * Note: this is NOT an excuse for not protecting against SIGPIPE. If
92 * LibVLC runs outside of VLC, we cannot rely on this code snippet. */
93 signal (SIGPIPE, SIG_IGN);
94 /* Restore default for SIGCHLD in case parent ignores it. */
95 signal (SIGCHLD, SIG_DFL);
99 /* Activate malloc checking routines to detect heap corruptions. */
100 setenv ("MALLOC_CHECK_", "2", 1);
102 /* Disable the ugly Gnome crash dialog so that we properly segfault */
103 setenv ("GNOME_DISABLE_CRASH_DIALOG", "1", 1);
106 /* Clear the X.Org startup notification ID. Otherwise the UI might try to
107 * change the environment while the process is multi-threaded. That could
108 * crash. Screw you X.Org. Next time write a thread-safe specification. */
109 unsetenv ("DESKTOP_STARTUP_ID");
112 #ifndef ALLOW_RUN_AS_ROOT
115 fprintf (stderr, "VLC is not supposed to be run as root. Sorry.\n"
116 "If you need to use real-time priorities and/or privileged TCP ports\n"
117 "you can use %s-wrapper (make sure it is Set-UID root and\n"
118 "cannot be run by non-trusted users first).\n", ppsz_argv[0]);
123 setlocale (LC_ALL, "");
126 /* This clutters OSX GUI error logs */
127 fprintf( stderr, "VLC media player %s (revision %s)\n",
128 libvlc_get_version(), libvlc_get_changeset() );
134 /* Synchronously intercepted POSIX signals.
136 * In a threaded program such as VLC, the only sane way to handle signals
137 * is to block them in all threads but one - this is the only way to
138 * predict which thread will receive them. If any piece of code depends
139 * on delivery of one of this signal it is intrinsically not thread-safe
140 * and MUST NOT be used in VLC, whether we like it or not.
141 * There is only one exception: if the signal is raised with
142 * pthread_kill() - we do not use this in LibVLC but some pthread
143 * implementations use them internally. You should really use conditions
144 * for thread synchronization anyway.
146 * Signal that request a clean shutdown, and force an unclean shutdown
147 * if they are triggered again 2+ seconds later.
148 * We have to handle SIGTERM cleanly because of daemon mode. */
149 sigaddset (&set, SIGINT);
150 sigaddset (&set, SIGHUP);
151 sigaddset (&set, SIGQUIT);
152 sigaddset (&set, SIGTERM);
154 /* Signals that cause a no-op:
155 * - SIGPIPE might happen with sockets and would crash VLC. It MUST be
156 * blocked by any LibVLC-dependent application, not just VLC.
157 * - SIGCHLD comes after exec*() (such as httpd CGI support) and must
158 * be dequeued to cleanup zombie processes.
160 sigaddset (&set, SIGPIPE);
161 sigaddset (&set, SIGCHLD);
164 sigaddset (&set, SIGRTMIN);
166 struct sigaction act = { .sa_handler = dummy_handler, };
167 sigaction (SIGRTMIN, &act, NULL);
170 /* Block all these signals */
171 pthread_sigmask (SIG_BLOCK, &set, NULL);
173 /* Note that FromLocale() can be used before libvlc is initialized */
174 const char *argv[i_argc + 3];
177 argv[argc++] = "--no-ignore-config";
179 argv[argc++] = FromLocale ("--plugin-path="TOP_BUILDDIR"/modules");
182 argv[argc++] = FromLocale ("--data-path="TOP_SRCDIR"/share");
187 /* When VLC.app is run by double clicking in Mac OS X, the 2nd arg
188 * is the PSN - process serial number (a unique PID-ish thingie)
189 * still ok for real Darwin & when run from command line
190 * for example -psn_0_9306113 */
191 if(i_argc >= 2 && !strncmp( ppsz_argv[1] , "-psn" , 4 ))
194 for (; i < i_argc; i++)
195 if ((argv[argc++] = FromLocale (ppsz_argv[i])) == NULL)
199 vlc_enable_override ();
201 /* Initialize libvlc */
202 libvlc_instance_t *vlc = libvlc_new (argc, argv);
206 libvlc_set_user_agent (vlc, "VLC media player", "VLC/"PACKAGE_VERSION);
208 #if !defined (HAVE_MAEMO) && !defined __APPLE__
209 libvlc_add_intf (vlc, "globalhotkeys,none");
211 if (libvlc_add_intf (vlc, NULL))
214 libvlc_playlist_play (vlc, -1, 0, NULL);
216 /* Wait for a termination signal */
217 pthread_t self = pthread_self ();
218 libvlc_set_exit_handler (vlc, vlc_kill, &self);
220 if (signal_ignored (SIGHUP)) /* <- needed to handle nohup properly */
221 sigdelset (&set, SIGHUP);
222 sigdelset (&set, SIGPIPE);
226 sigwait (&set, &signum);
227 while (signum == SIGCHLD);
229 /* Restore default signal behaviour after 3 seconds */
231 sigaddset (&set, SIGINT);
232 sigaddset (&set, SIGALRM);
233 signal (SIGINT, SIG_IGN);
234 signal (SIGALRM, exit_timeout);
235 pthread_sigmask (SIG_UNBLOCK, &set, NULL);
241 libvlc_release (vlc);
242 for (int i = 1; i < argc; i++)
243 LocaleFree (argv[i]);
245 /* Do not run exit handlers. Some of them are buggy (e.g. KDE IO scheduler)
246 * and crash. Also some will crash because their library may be already
247 * unloaded (dlclose()). */