bin/vlc.c

   1 /*****************************************************************************
   2  * vlc.c: the VLC player
   3  *****************************************************************************
   4  * Copyright (C) 1998-2008 the VideoLAN team
   5  * $Id$
   6  *
   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
  12  *
  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.
  17  *
  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.
  22  *
  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  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc/vlc.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <locale.h>
  36
  37 #ifdef __APPLE__
  38 #include <string.h>
  39 #endif
  40
  41
  42 /* Explicit HACK */
  43 extern void LocaleFree (const char *);
  44 extern char *FromLocale (const char *);
  45 extern void vlc_enable_override (void);
  46
  47 #include <signal.h>
  48 #include <time.h>
  49 #include <pthread.h>
  50 #include <unistd.h>
  51 #include <dlfcn.h>
  52
  53 /*****************************************************************************
  54  * main: parse command line, start interface and spawn threads.
  55  *****************************************************************************/
  56 int main( int i_argc, const char *ppsz_argv[] )
  57 {
  58     /* The so-called POSIX-compliant MacOS X reportedly processes SIGPIPE even
  59      * if it is blocked in all thread. Also some libraries want SIGPIPE blocked
  60      * as they have no clue about signal masks.
  61      * Note: this is NOT an excuse for not protecting against SIGPIPE. If
  62      * LibVLC runs outside of VLC, we cannot rely on this code snippet. */
  63     signal (SIGPIPE, SIG_IGN);
  64
  65 #ifdef HAVE_PUTENV
  66 # ifndef NDEBUG
  67     /* Activate malloc checking routines to detect heap corruptions. */
  68     putenv( (char*)"MALLOC_CHECK_=2" );
  69
  70     /* Disable the ugly Gnome crash dialog so that we properly segfault */
  71     putenv( (char *)"GNOME_DISABLE_CRASH_DIALOG=1" );
  72 # endif
  73
  74     /* Make Xlib hide visuals with an alphachannel. Ensure that Qt4 will not
  75      * use the alpha channel for the embedded video window. */
  76     putenv( (char *)"XLIB_SKIP_ARGB_VISUALS=1" );
  77 #endif
  78 #ifdef HAVE_SETENV
  79     /* Clear the X.Org startup notification ID. Otherwise the UI might try to
  80      * change the environment while the process is multi-threaded. That could
  81      * crash. Screw you X.Org. Next time write a thread-safe specification. */
  82     unsetenv ("DESKTOP_STARTUP_ID");
  83 #endif
  84
  85 #ifndef ALLOW_RUN_AS_ROOT
  86     if (geteuid () == 0)
  87     {
  88         fprintf (stderr, "VLC is not supposed to be run as root. Sorry.\n"
  89         "If you need to use real-time priorities and/or privileged TCP ports\n"
  90         "you can use %s-wrapper (make sure it is Set-UID root and\n"
  91         "cannot be run by non-trusted users first).\n", ppsz_argv[0]);
  92         return 1;
  93     }
  94 #endif
  95
  96     setlocale (LC_ALL, "");
  97
  98 #ifndef __APPLE__
  99     /* This clutters OSX GUI error logs */
 100     fprintf( stderr, "VLC media player %s (revision %s)\n",
 101              libvlc_get_version(), libvlc_get_changeset() );
 102 #endif
 103
 104     /* Synchronously intercepted POSIX signals.
 105      *
 106      * In a threaded program such as VLC, the only sane way to handle signals
 107      * is to block them in all threads but one - this is the only way to
 108      * predict which thread will receive them. If any piece of code depends
 109      * on delivery of one of this signal it is intrinsically not thread-safe
 110      * and MUST NOT be used in VLC, whether we like it or not.
 111      * There is only one exception: if the signal is raised with
 112      * pthread_kill() - we do not use this in LibVLC but some pthread
 113      * implementations use them internally. You should really use conditions
 114      * for thread synchronization anyway.
 115      *
 116      * Signal that request a clean shutdown, and force an unclean shutdown
 117      * if they are triggered again 2+ seconds later.
 118      * We have to handle SIGTERM cleanly because of daemon mode.
 119      * Note that we set the signals after the vlc_create call. */
 120     static const int sigs[] = {
 121         SIGINT, SIGHUP, SIGQUIT, SIGTERM,
 122     /* Signals that cause a no-op:
 123      * - SIGPIPE might happen with sockets and would crash VLC. It MUST be
 124      *   blocked by any LibVLC-dependent application, not just VLC.
 125      * - SIGCHLD comes after exec*() (such as httpd CGI support) and must
 126      *   be dequeued to cleanup zombie processes.
 127      */
 128         SIGPIPE, SIGCHLD
 129     };
 130
 131     sigset_t set;
 132     sigemptyset (&set);
 133     for (unsigned i = 0; i < sizeof (sigs) / sizeof (sigs[0]); i++)
 134         sigaddset (&set, sigs[i]);
 135
 136     /* Block all these signals */
 137     pthread_sigmask (SIG_BLOCK, &set, NULL);
 138     sigdelset (&set, SIGPIPE);
 139     sigdelset (&set, SIGCHLD);
 140
 141     /* Note that FromLocale() can be used before libvlc is initialized */
 142     const char *argv[i_argc + 3];
 143     int argc = 0;
 144
 145     argv[argc++] = "--no-ignore-config";
 146 #ifdef TOP_BUILDDIR
 147     argv[argc++] = FromLocale ("--plugin-path="TOP_BUILDDIR"/modules");
 148 #endif
 149 #ifdef TOP_SRCDIR
 150     argv[argc++] = FromLocale ("--data-path="TOP_SRCDIR"/share");
 151 #endif
 152
 153     int i = 1;
 154 #ifdef __APPLE__
 155     /* When VLC.app is run by double clicking in Mac OS X, the 2nd arg
 156      * is the PSN - process serial number (a unique PID-ish thingie)
 157      * still ok for real Darwin & when run from command line
 158      * for example -psn_0_9306113 */
 159     if(i_argc >= 2 && !strncmp( ppsz_argv[1] , "-psn" , 4 ))
 160         i = 2;
 161 #endif
 162     for (; i < i_argc; i++)
 163         if ((argv[argc++] = FromLocale (ppsz_argv[i])) == NULL)
 164             return 1; // BOOM!
 165     argv[argc] = NULL;
 166
 167     vlc_enable_override ();
 168
 169     /* Initialize libvlc */
 170     libvlc_instance_t *vlc = libvlc_new (argc, argv);
 171
 172     if (vlc != NULL)
 173     {
 174         if (libvlc_add_intf (vlc, "signals"))
 175             pthread_sigmask (SIG_UNBLOCK, &set, NULL);
 176 #if !defined (HAVE_MAEMO)
 177         libvlc_add_intf (vlc, "globalhotkeys,none");
 178 #endif
 179         if (libvlc_add_intf (vlc, NULL) == 0)
 180         {
 181             libvlc_playlist_play (vlc, -1, 0, NULL);
 182             libvlc_wait (vlc);
 183         }
 184         libvlc_release (vlc);
 185     }
 186
 187     for (int i = 1; i < argc; i++)
 188         LocaleFree (argv[i]);
 189
 190 #ifdef RTLD_NOLOAD
 191     /* Avoid crash in KIO scheduler cleanup. */
 192     /* This is ugly, but we get way too many crash reports due to this. */
 193     if (dlopen ("libkfilemodule.so", RTLD_LAZY|RTLD_LOCAL|RTLD_NOLOAD) != NULL)
 194     {
 195         fprintf (stderr, "KFile plugin present. Unclean shutdown!\n");
 196         _exit (0);
 197     }
 198 #endif
 199     return 0;
 200 }