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
  38 /* Explicit HACK */
  39 extern void LocaleFree (const char *);
  40 extern char *FromLocale (const char *);
  41
  42 #include <signal.h>
  43 #include <time.h>
  44 #include <pthread.h>
  45 #include <unistd.h>
  46
  47 /*****************************************************************************
  48  * main: parse command line, start interface and spawn threads.
  49  *****************************************************************************/
  50 int main( int i_argc, const char *ppsz_argv[] )
  51 {
  52     int i_ret;
  53
  54 #ifdef __APPLE__
  55     /* The so-called POSIX-compliant MacOS X is not.
  56      * SIGPIPE fires even when it is blocked in all threads! */
  57     signal (SIGPIPE, SIG_IGN);
  58 #endif
  59
  60 #ifndef ALLOW_RUN_AS_ROOT
  61     if (geteuid () == 0)
  62     {
  63         fprintf (stderr, "VLC is not supposed to be run as root. Sorry.\n"
  64         "If you need to use real-time priorities and/or privileged TCP ports\n"
  65         "you can use %s-wrapper (make sure it is Set-UID root and\n"
  66         "cannot be run by non-trusted users first).\n", ppsz_argv[0]);
  67         return 1;
  68     }
  69 #endif
  70
  71     setlocale (LC_ALL, "");
  72
  73 #ifndef __APPLE__
  74     /* This clutters OSX GUI error logs */
  75     fprintf( stderr, "VLC media player %s\n", libvlc_get_version() );
  76 #endif
  77
  78 #ifdef HAVE_PUTENV
  79 #   ifndef NDEBUG
  80     /* Activate malloc checking routines to detect heap corruptions. */
  81     putenv( (char*)"MALLOC_CHECK_=2" );
  82 #       ifdef __APPLE__
  83     putenv( (char*)"MallocErrorAbort=crash_my_baby_crash" );
  84 #       endif
  85
  86     /* Disable the ugly Gnome crash dialog so that we properly segfault */
  87     putenv( (char *)"GNOME_DISABLE_CRASH_DIALOG=1" );
  88 #   endif
  89 #endif
  90
  91     /* Synchronously intercepted POSIX signals.
  92      *
  93      * In a threaded program such as VLC, the only sane way to handle signals
  94      * is to block them in all thread but one - this is the only way to
  95      * predict which thread will receive them. If any piece of code depends
  96      * on delivery of one of this signal it is intrinsically not thread-safe
  97      * and MUST NOT be used in VLC, whether we like it or not.
  98      * There is only one exception: if the signal is raised with
  99      * pthread_kill() - we do not use this in LibVLC but some pthread
 100      * implementations use them internally. You should really use conditions
 101      * for thread synchronization anyway.
 102      *
 103      * Signal that request a clean shutdown, and force an unclean shutdown
 104      * if they are triggered again 2+ seconds later.
 105      * We have to handle SIGTERM cleanly because of daemon mode.
 106      * Note that we set the signals after the vlc_create call. */
 107     static const int sigs[] = {
 108         SIGINT, SIGHUP, SIGQUIT, SIGTERM,
 109     /* Signals that cause a no-op:
 110      * - SIGPIPE might happen with sockets and would crash VLC. It MUST be
 111      *   blocked by any LibVLC-dependent application, not just VLC.
 112      * - SIGCHLD comes after exec*() (such as httpd CGI support) and must
 113      *   be dequeued to cleanup zombie processes.
 114      */
 115         SIGPIPE, SIGCHLD
 116     };
 117
 118     sigset_t set;
 119     sigemptyset (&set);
 120     for (unsigned i = 0; i < sizeof (sigs) / sizeof (sigs[0]); i++)
 121         sigaddset (&set, sigs[i]);
 122
 123     /* Block all these signals */
 124     pthread_sigmask (SIG_BLOCK, &set, NULL);
 125     sigdelset (&set, SIGPIPE);
 126     sigdelset (&set, SIGCHLD);
 127
 128     /* Note that FromLocale() can be used before libvlc is initialized */
 129     const char *argv[i_argc + 3];
 130     int argc = 0;
 131
 132 #ifdef TOP_BUILDDIR
 133     argv[argc++] = FromLocale ("--plugin-path="TOP_BUILDDIR"/modules");
 134 #endif
 135 #ifdef TOP_SRCDIR
 136 # ifdef ENABLE_HTTPD
 137     argv[argc++] = FromLocale ("--http-src="TOP_SRCDIR"/share/http");
 138 # endif
 139 #endif
 140
 141     for (int i = 1; i < i_argc; i++)
 142         if ((argv[argc++] = FromLocale (ppsz_argv[i])) == NULL)
 143             return 1; // BOOM!
 144
 145     libvlc_exception_t ex, dummy;
 146     libvlc_exception_init (&ex);
 147     libvlc_exception_init (&dummy);
 148
 149     /* Initialize libvlc */
 150     libvlc_instance_t *vlc = libvlc_new (argc, argv, &ex);
 151
 152     if (vlc != NULL)
 153     {
 154         libvlc_add_intf (vlc, "signals", &ex);
 155         if (libvlc_exception_raised (&ex))
 156         {
 157             libvlc_exception_clear (&ex);
 158             pthread_sigmask (SIG_UNBLOCK, &set, NULL);
 159         }
 160         libvlc_add_intf (vlc, "globalhotkeys,none", &ex);
 161         libvlc_exception_clear (&ex);
 162         libvlc_add_intf (vlc, NULL, &ex);
 163         libvlc_playlist_play (vlc, -1, 0, NULL, &dummy);
 164         libvlc_wait (vlc);
 165         libvlc_release (vlc);
 166     }
 167     i_ret = libvlc_exception_raised (&ex);
 168     if( i_ret )
 169         fprintf( stderr, "%s\n", libvlc_errmsg() );
 170
 171     libvlc_exception_clear (&ex);
 172     libvlc_exception_clear (&dummy);
 173
 174     for (int i = 0; i < argc; i++)
 175         LocaleFree (argv[i]);
 176
 177     return i_ret;
 178 }