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
  46 #include <signal.h>
  47 #include <time.h>
  48 #include <pthread.h>
  49 #include <unistd.h>
  50
  51 /*****************************************************************************
  52  * main: parse command line, start interface and spawn threads.
  53  *****************************************************************************/
  54 int main( int i_argc, const char *ppsz_argv[] )
  55 {
  56 #ifdef __APPLE__
  57     /* The so-called POSIX-compliant MacOS X is not.
  58      * SIGPIPE fires even when it is blocked in all threads! */
  59     signal (SIGPIPE, SIG_IGN);
  60 #endif
  61
  62 #ifndef ALLOW_RUN_AS_ROOT
  63     if (geteuid () == 0)
  64     {
  65         fprintf (stderr, "VLC is not supposed to be run as root. Sorry.\n"
  66         "If you need to use real-time priorities and/or privileged TCP ports\n"
  67         "you can use %s-wrapper (make sure it is Set-UID root and\n"
  68         "cannot be run by non-trusted users first).\n", ppsz_argv[0]);
  69         return 1;
  70     }
  71 #endif
  72
  73     setlocale (LC_ALL, "");
  74
  75 #ifndef __APPLE__
  76     /* This clutters OSX GUI error logs */
  77     fprintf( stderr, "VLC media player %s\n", libvlc_get_version() );
  78 #endif
  79
  80 #ifdef HAVE_PUTENV
  81 #   ifndef NDEBUG
  82     /* Activate malloc checking routines to detect heap corruptions. */
  83     putenv( (char*)"MALLOC_CHECK_=2" );
  84
  85     /* Disable the ugly Gnome crash dialog so that we properly segfault */
  86     putenv( (char *)"GNOME_DISABLE_CRASH_DIALOG=1" );
  87 #   endif
  88 #endif
  89
  90     /* Synchronously intercepted POSIX signals.
  91      *
  92      * In a threaded program such as VLC, the only sane way to handle signals
  93      * is to block them in all thread but one - this is the only way to
  94      * predict which thread will receive them. If any piece of code depends
  95      * on delivery of one of this signal it is intrinsically not thread-safe
  96      * and MUST NOT be used in VLC, whether we like it or not.
  97      * There is only one exception: if the signal is raised with
  98      * pthread_kill() - we do not use this in LibVLC but some pthread
  99      * implementations use them internally. You should really use conditions
 100      * for thread synchronization anyway.
 101      *
 102      * Signal that request a clean shutdown, and force an unclean shutdown
 103      * if they are triggered again 2+ seconds later.
 104      * We have to handle SIGTERM cleanly because of daemon mode.
 105      * Note that we set the signals after the vlc_create call. */
 106     static const int sigs[] = {
 107         SIGINT, SIGHUP, SIGQUIT, SIGTERM,
 108     /* Signals that cause a no-op:
 109      * - SIGPIPE might happen with sockets and would crash VLC. It MUST be
 110      *   blocked by any LibVLC-dependent application, not just VLC.
 111      * - SIGCHLD comes after exec*() (such as httpd CGI support) and must
 112      *   be dequeued to cleanup zombie processes.
 113      */
 114         SIGPIPE, SIGCHLD
 115     };
 116
 117     sigset_t set;
 118     sigemptyset (&set);
 119     for (unsigned i = 0; i < sizeof (sigs) / sizeof (sigs[0]); i++)
 120         sigaddset (&set, sigs[i]);
 121
 122     /* Block all these signals */
 123     pthread_sigmask (SIG_BLOCK, &set, NULL);
 124     sigdelset (&set, SIGPIPE);
 125     sigdelset (&set, SIGCHLD);
 126
 127     /* Note that FromLocale() can be used before libvlc is initialized */
 128     const char *argv[i_argc + 3];
 129     int argc = 0;
 130
 131     argv[argc++] = "--no-ignore-config";
 132 #ifdef TOP_BUILDDIR
 133     argv[argc++] = FromLocale ("--plugin-path="TOP_BUILDDIR"/modules");
 134 #endif
 135 #ifdef TOP_SRCDIR
 136     argv[argc++] = FromLocale ("--data-path="TOP_SRCDIR"/share");
 137 #endif
 138
 139     int i = 1;
 140 #ifdef __APPLE__
 141     /* When VLC.app is run by double clicking in Mac OS X, the 2nd arg
 142      * is the PSN - process serial number (a unique PID-ish thingie)
 143      * still ok for real Darwin & when run from command line
 144      * for example -psn_0_9306113 */
 145     if(i_argc >= 2 && !strncmp( ppsz_argv[1] , "-psn" , 4 ))
 146         i = 2;
 147 #endif
 148     for (; i < i_argc; i++)
 149         if ((argv[argc++] = FromLocale (ppsz_argv[i])) == NULL)
 150             return 1; // BOOM!
 151     argv[argc] = NULL;
 152
 153     libvlc_exception_t ex, dummy;
 154     libvlc_exception_init (&ex);
 155     libvlc_exception_init (&dummy);
 156
 157     /* Initialize libvlc */
 158     libvlc_instance_t *vlc = libvlc_new (argc, argv, &ex);
 159
 160     if (vlc != NULL)
 161     {
 162         if (libvlc_add_intf (vlc, "signals"))
 163             pthread_sigmask (SIG_UNBLOCK, &set, NULL);
 164 #if !defined (HAVE_MAEMO)
 165         libvlc_add_intf (vlc, "globalhotkeys,none");
 166 #endif
 167         libvlc_add_intf (vlc, NULL);
 168         libvlc_playlist_play (vlc, -1, 0, NULL, &dummy);
 169         libvlc_wait (vlc);
 170         libvlc_release (vlc);
 171     }
 172
 173     for (int i = 1; i < argc; i++)
 174         LocaleFree (argv[i]);
 175
 176     return vlc == NULL || libvlc_exception_raised (&ex);
 177 }