src/vlc.c

   1 /*****************************************************************************
   2  * vlc.c: the vlc player
   3  *****************************************************************************
   4  * Copyright (C) 1998-2004 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 #include "config.h"
  29
  30 #include <vlc/vlc.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <locale.h>
  34 #ifdef __GLIBC__
  35 #include <dlfcn.h>
  36 #endif
  37
  38
  39 /* Explicit HACK */
  40 extern void LocaleFree (const char *);
  41 extern char *FromLocale (const char *);
  42
  43
  44 /*****************************************************************************
  45  * Local prototypes.
  46  *****************************************************************************/
  47 #ifdef WIN32
  48 #include <windows.h>
  49 extern void __wgetmainargs(int *argc, wchar_t ***wargv, wchar_t ***wenviron,
  50                            int expand_wildcards, int *startupinfo);
  51 static inline void Kill(void) { }
  52 #else
  53
  54 # include <signal.h>
  55 # include <time.h>
  56 # include <pthread.h>
  57
  58 static void Kill (void);
  59 static void *SigHandler (void *set);
  60 #endif
  61
  62 /*****************************************************************************
  63  * main: parse command line, start interface and spawn threads.
  64  *****************************************************************************/
  65 int main( int i_argc, const char *ppsz_argv[] )
  66 {
  67     int i_ret;
  68
  69 #   ifdef __GLIBC__
  70     if (dlsym (RTLD_NEXT, "inet6_rth_add") && !dlsym (RTLD_NEXT, "qsort_r"))
  71     {
  72         /* Way too many Linux users have glibc 2.5-2.7 that keeps crashing
  73          * inside its non-thread-safe dcgettext(). */
  74         /* Hopefully glibc 2.8 will eventually work, not sure though */
  75         fprintf (stderr,
  76 "***************************************************\n"
  77 "*** glibc version with broken libintl detected. ***\n"
  78 "*** Messages localization will be disabled.     ***\n"
  79 "***************************************************\n");
  80         setenv ("LC_MESSAGES", "C", 1);
  81     }
  82 #   endif
  83     setlocale (LC_ALL, "");
  84
  85 #ifndef __APPLE__
  86     /* This clutters OSX GUI error logs */
  87     fprintf( stderr, "VLC media player %s\n", VLC_Version() );
  88 #endif
  89
  90 #ifdef HAVE_PUTENV
  91 #   ifdef DEBUG
  92     /* Activate malloc checking routines to detect heap corruptions. */
  93     putenv( (char*)"MALLOC_CHECK_=2" );
  94
  95     /* Disable the ugly Gnome crash dialog so that we properly segfault */
  96     putenv( (char *)"GNOME_DISABLE_CRASH_DIALOG=1" );
  97 #   endif
  98 #endif
  99
 100 #if defined (HAVE_GETEUID) && !defined (SYS_BEOS)
 101     /* FIXME: rootwrap (); */
 102 #endif
 103
 104     /* Create a libvlc structure */
 105     i_ret = VLC_Create();
 106     if( i_ret < 0 )
 107     {
 108         return -i_ret;
 109     }
 110
 111 #if !defined(WIN32) && !defined(UNDER_CE)
 112     /* Synchronously intercepted POSIX signals.
 113      *
 114      * In a threaded program such as VLC, the only sane way to handle signals
 115      * is to block them in all thread but one - this is the only way to
 116      * predict which thread will receive them. If any piece of code depends
 117      * on delivery of one of this signal it is intrinsically not thread-safe
 118      * and MUST NOT be used in VLC, whether we like it or not.
 119      * There is only one exception: if the signal is raised with
 120      * pthread_kill() - we do not use this in LibVLC but some pthread
 121      * implementations use them internally. You should really use conditions
 122      * for thread synchronization anyway.
 123      *
 124      * Signal that request a clean shutdown, and force an unclean shutdown
 125      * if they are triggered again 2+ seconds later.
 126      * We have to handle SIGTERM cleanly because of daemon mode.
 127      * Note that we set the signals after the vlc_create call. */
 128     static const int exitsigs[] = { SIGINT, SIGHUP, SIGQUIT, SIGTERM };
 129     /* Signals that cause a no-op:
 130      * - SIGALRM should not happen, but lets stay on the safe side.
 131      * - SIGPIPE might happen with sockets and would crash VLC. It MUST be
 132      *   blocked by any LibVLC-dependant application, in addition to VLC.
 133      * - SIGCHLD is comes after exec*() (such as httpd CGI support) and must
 134      *   be dequeued to cleanup zombie processes.
 135      */
 136     static const int dummysigs[] = { SIGALRM, SIGPIPE, SIGCHLD };
 137
 138     sigset_t set;
 139     pthread_t sigth;
 140
 141     sigemptyset (&set);
 142     for (unsigned i = 0; i < sizeof (exitsigs) / sizeof (exitsigs[0]); i++)
 143         sigaddset (&set, exitsigs[i]);
 144     for (unsigned i = 0; i < sizeof (dummysigs) / sizeof (dummysigs[0]); i++)
 145         sigaddset (&set, dummysigs[i]);
 146
 147     /* Block all these signals */
 148     pthread_sigmask (SIG_BLOCK, &set, NULL);
 149
 150     for (unsigned i = 0; i < sizeof (dummysigs) / sizeof (dummysigs[0]); i++)
 151         sigdelset (&set, dummysigs[i]);
 152
 153     pthread_create (&sigth, NULL, SigHandler, &set);
 154 #endif
 155
 156 #ifdef WIN32
 157     /* Replace argv[1..n] with unicode for Windows NT and above */
 158     if( GetVersion() < 0x80000000 )
 159     {
 160         wchar_t **wargv, **wenvp;
 161         int i,i_wargc;
 162         int si = { 0 };
 163         __wgetmainargs(&i_wargc, &wargv, &wenvp, 0, &si);
 164
 165         for( i = 0; i < i_wargc; i++ )
 166         {
 167             int len = WideCharToMultiByte(CP_UTF8, 0, wargv[i], -1, NULL, 0, NULL, NULL);
 168             if( len > 0 )
 169             {
 170                 if( len > 1 ) {
 171                     char *utf8arg = (char *)malloc(len);
 172                     if( NULL != utf8arg )
 173                     {
 174                         WideCharToMultiByte(CP_UTF8, 0, wargv[i], -1, utf8arg, len, NULL, NULL);
 175                         ppsz_argv[i] = utf8arg;
 176                     }
 177                     else
 178                     {
 179                         /* failed!, quit */
 180                         return 1;
 181                     }
 182                 }
 183                 else
 184                 {
 185                     ppsz_argv[i] = strdup ("");
 186                 }
 187             }
 188             else
 189             {
 190                 /* failed!, quit */
 191                 return 1;
 192             }
 193         }
 194     }
 195     else
 196 #endif
 197     {
 198         for (int i = 0; i < i_argc; i++)
 199             if ((ppsz_argv[i] = FromLocale (ppsz_argv[i])) == NULL)
 200                 return 1; // BOOM!
 201     }
 202
 203     /* Initialize libvlc */
 204     i_ret = VLC_Init( 0, i_argc, ppsz_argv );
 205     if( i_ret < 0 )
 206     {
 207         VLC_Destroy( 0 );
 208         return i_ret == VLC_EEXITSUCCESS ? 0 : -i_ret;
 209     }
 210
 211     i_ret = VLC_AddIntf( 0, NULL, VLC_TRUE, VLC_TRUE );
 212
 213     /* Finish the threads */
 214     VLC_CleanUp( 0 );
 215
 216     Kill ();
 217
 218     /* Destroy the libvlc structure */
 219     VLC_Destroy( 0 );
 220
 221     for (int i = 0; i < i_argc; i++)
 222         LocaleFree (ppsz_argv[i]);
 223
 224 #if !defined(WIN32) && !defined(UNDER_CE)
 225     pthread_cancel (sigth);
 226 # ifdef __APPLE__
 227     /* In Mac OS X up to 10.4.8 sigwait (among others) is not a pthread
 228      * cancellation point, so we throw a dummy quit signal to end
 229      * sigwait() in the sigth thread */
 230     pthread_kill (sigth, SIGQUIT);
 231 # endif
 232     pthread_join (sigth, NULL);
 233 #endif
 234
 235     return -i_ret;
 236 }
 237
 238 #if !defined(WIN32) && !defined(UNDER_CE)
 239 /*****************************************************************************
 240  * SigHandler: system signal handler
 241  *****************************************************************************
 242  * This thread receives all handled signals synchronously.
 243  * It tries to end the program in a clean way.
 244  *****************************************************************************/
 245 static void *SigHandler (void *data)
 246 {
 247     const sigset_t *exitset = (sigset_t *)data;
 248     sigset_t fullset;
 249     time_t abort_time = 0;
 250
 251     pthread_sigmask (SIG_BLOCK, exitset, &fullset);
 252
 253     for (;;)
 254     {
 255         int i_signal, state;
 256         if( sigwait (&fullset, &i_signal) != 0 )
 257             continue;
 258
 259 #ifdef __APPLE__
 260         /* In Mac OS X up to 10.4.8 sigwait (among others) is not a pthread
 261          * cancellation point */
 262         pthread_testcancel();
 263 #endif
 264
 265         if (!sigismember (exitset, i_signal))
 266             continue; /* Ignore "dummy" signals */
 267
 268         /* Once a signal has been trapped, the termination sequence will be
 269          * armed and subsequent signals will be ignored to avoid sending
 270          * signals to a libvlc structure having been destroyed */
 271
 272         pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &state);
 273         if (abort_time == 0)
 274         {
 275             time (&abort_time);
 276             abort_time += 2;
 277
 278             fprintf (stderr, "signal %d received, terminating vlc - do it "
 279                             "again in case it gets stuck\n", i_signal);
 280
 281             /* Acknowledge the signal received */
 282             Kill ();
 283         }
 284         else
 285         if (time (NULL) <= abort_time)
 286         {
 287             /* If user asks again more than 2 seconds later, die badly */
 288             pthread_sigmask (SIG_UNBLOCK, exitset, NULL);
 289             fprintf (stderr, "user insisted too much, dying badly\n");
 290             abort ();
 291         }
 292         pthread_setcancelstate (state, NULL);
 293     }
 294     /* Never reached */
 295 }
 296
 297
 298 static void KillOnce (void)
 299 {
 300     VLC_Die (0);
 301 }
 302
 303 static void Kill (void)
 304 {
 305     static pthread_once_t once = PTHREAD_ONCE_INIT;
 306     pthread_once (&once, KillOnce);
 307 }
 308
 309 #endif
 310
 311 #if defined(UNDER_CE)
 312 #   if defined( _MSC_VER ) && defined( UNDER_CE )
 313 #       include "vlc_common.h"
 314 #   endif
 315 /*****************************************************************************
 316  * WinMain: parse command line, start interface and spawn threads. (WinCE only)
 317  *****************************************************************************/
 318 int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
 319                     LPTSTR lpCmdLine, int nCmdShow )
 320 {
 321     char **argv, psz_cmdline[MAX_PATH];
 322     int argc, i_ret;
 323
 324     WideCharToMultiByte( CP_ACP, 0, lpCmdLine, -1,
 325                          psz_cmdline, MAX_PATH, NULL, NULL );
 326
 327     argv = vlc_parse_cmdline( psz_cmdline, &argc );
 328     argv = realloc( argv, (argc + 1) * sizeof(char *) );
 329     if( !argv ) return -1;
 330
 331     if( argc ) memmove( argv + 1, argv, argc * sizeof(char *) );
 332     argv[0] = ""; /* Fake program path */
 333
 334     i_ret = main( argc + 1, argv );
 335
 336     /* No need to free the argv memory */
 337     return i_ret;
 338 }
 339 #endif