src/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     if (geteuid () == 0)
  55     {
  56         fprintf (stderr, "VLC is not supposed to be run as root. Sorry.\n"
  57         "If you need to use real-time priorities and/or privileged TCP ports\n"
  58         "you can use %s-wrapper (make sure it is Set-UID root first and\n"
  59         "cannot be run by non-trusted users first).\n", ppsz_argv[0]);
  60         return 1;
  61     }
  62
  63     setlocale (LC_ALL, "");
  64
  65 #ifndef __APPLE__
  66     /* This clutters OSX GUI error logs */
  67     fprintf( stderr, "VLC media player %s\n", libvlc_get_version() );
  68 #endif
  69
  70 #ifdef HAVE_PUTENV
  71 #   ifndef NDEBUG
  72     /* Activate malloc checking routines to detect heap corruptions. */
  73     putenv( (char*)"MALLOC_CHECK_=2" );
  74 #       ifdef __APPLE__
  75     putenv( (char*)"MallocErrorAbort=crash_my_baby_crash" );
  76 #       endif
  77
  78     /* Disable the ugly Gnome crash dialog so that we properly segfault */
  79     putenv( (char *)"GNOME_DISABLE_CRASH_DIALOG=1" );
  80 #   endif
  81 #endif
  82
  83 #if defined (HAVE_GETEUID) && !defined (SYS_BEOS)
  84     /* FIXME: rootwrap (); */
  85 #endif
  86
  87     /* Synchronously intercepted POSIX signals.
  88      *
  89      * In a threaded program such as VLC, the only sane way to handle signals
  90      * is to block them in all thread but one - this is the only way to
  91      * predict which thread will receive them. If any piece of code depends
  92      * on delivery of one of this signal it is intrinsically not thread-safe
  93      * and MUST NOT be used in VLC, whether we like it or not.
  94      * There is only one exception: if the signal is raised with
  95      * pthread_kill() - we do not use this in LibVLC but some pthread
  96      * implementations use them internally. You should really use conditions
  97      * for thread synchronization anyway.
  98      *
  99      * Signal that request a clean shutdown, and force an unclean shutdown
 100      * if they are triggered again 2+ seconds later.
 101      * We have to handle SIGTERM cleanly because of daemon mode.
 102      * Note that we set the signals after the vlc_create call. */
 103     static const int sigs[] = {
 104         SIGINT, SIGHUP, SIGQUIT, SIGTERM,
 105     /* Signals that cause a no-op:
 106      * - SIGPIPE might happen with sockets and would crash VLC. It MUST be
 107      *   blocked by any LibVLC-dependent application, in addition to VLC.
 108      * - SIGCHLD is comes after exec*() (such as httpd CGI support) and must
 109      *   be dequeued to cleanup zombie processes.
 110      */
 111         SIGPIPE, SIGCHLD
 112     };
 113
 114     sigset_t set;
 115     sigemptyset (&set);
 116     for (unsigned i = 0; i < sizeof (sigs) / sizeof (sigs[0]); i++)
 117         sigaddset (&set, sigs[i]);
 118
 119     /* Block all these signals */
 120     pthread_sigmask (SIG_BLOCK, &set, NULL);
 121
 122     /* Note that FromLocale() can be used before libvlc is initialized */
 123     for (int i = 0; i < i_argc; i++)
 124         if ((ppsz_argv[i] = FromLocale (ppsz_argv[i])) == NULL)
 125             return 1; // BOOM!
 126
 127     libvlc_exception_t ex, dummy;
 128     libvlc_exception_init (&ex);
 129     libvlc_exception_init (&dummy);
 130
 131     /* Initialize libvlc */
 132     int i_argc_real = i_argc ? i_argc - 1 : 0;
 133     const char **ppsz_argv_real = i_argc ? &ppsz_argv[1] : ppsz_argv;
 134     libvlc_instance_t *vlc = libvlc_new (i_argc_real, ppsz_argv_real, &ex);
 135
 136     if (vlc != NULL)
 137     {
 138         libvlc_add_intf (vlc, "signals", &dummy);
 139         libvlc_add_intf (vlc, NULL, &ex);
 140         libvlc_playlist_play (vlc, -1, 0, NULL, &dummy);
 141         libvlc_wait (vlc);
 142         libvlc_release (vlc);
 143     }
 144     i_ret = libvlc_exception_raised (&ex);
 145     if( i_ret )
 146         fprintf( stderr, "%s\n", libvlc_exception_get_message( &ex));
 147
 148     libvlc_exception_clear (&ex);
 149     libvlc_exception_clear (&dummy);
 150
 151     for (int i = 0; i < i_argc; i++)
 152         LocaleFree (ppsz_argv[i]);
 153
 154     return i_ret;
 155 }