Felix Paul Kühne
13 years ago
3 changed files with 225 additions and 11 deletions
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/*****************************************************************************
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* darwinvlc.c: the darwin-specific VLC player |
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***************************************************************************** |
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* Copyright (C) 1998-2013 the VideoLAN team |
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* $Id$ |
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* |
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* Authors: Vincent Seguin <seguin@via.ecp.fr> |
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* Samuel Hocevar <sam@zoy.org> |
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* Gildas Bazin <gbazin@videolan.org> |
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* Derk-Jan Hartman <hartman at videolan dot org> |
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* Lots of other people, see the libvlc AUTHORS file |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. |
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*****************************************************************************/ |
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#ifdef HAVE_CONFIG_H |
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# include "config.h" |
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#endif |
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#include <vlc/vlc.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <stdbool.h> |
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#include <string.h> |
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#include <locale.h> |
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#include <signal.h> |
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#ifdef HAVE_PTHREAD_H |
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# include <pthread.h> |
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#endif |
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#include <unistd.h> |
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extern void vlc_enable_override (void); |
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static bool signal_ignored (int signum) |
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{ |
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struct sigaction sa; |
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if (sigaction (signum, NULL, &sa)) |
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return false; |
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return ((sa.sa_flags & SA_SIGINFO) |
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? (void *)sa.sa_sigaction : (void *)sa.sa_handler) == SIG_IGN; |
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} |
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static void vlc_kill (void *data) |
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{ |
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pthread_t *ps = data; |
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pthread_kill (*ps, SIGTERM); |
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} |
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static void exit_timeout (int signum) |
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{ |
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(void) signum; |
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signal (SIGINT, SIG_DFL); |
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} |
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/*****************************************************************************
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* main: parse command line, start interface and spawn threads. |
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*****************************************************************************/ |
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int main( int i_argc, const char *ppsz_argv[] ) |
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{ |
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/* The so-called POSIX-compliant MacOS X reportedly processes SIGPIPE even
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* if it is blocked in all thread. |
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* Note: this is NOT an excuse for not protecting against SIGPIPE. If |
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* LibVLC runs outside of VLC, we cannot rely on this code snippet. */ |
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signal (SIGPIPE, SIG_IGN); |
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/* Restore SIGCHLD in case our parent process ignores it. */ |
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signal (SIGCHLD, SIG_DFL); |
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#ifndef NDEBUG |
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/* Activate malloc checking routines to detect heap corruptions. */ |
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setenv ("MALLOC_CHECK_", "2", 1); |
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#endif |
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#ifdef TOP_BUILDDIR |
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setenv ("VLC_PLUGIN_PATH", TOP_BUILDDIR"/modules", 1); |
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setenv ("VLC_DATA_PATH", TOP_SRCDIR"/share", 1); |
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#endif |
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#ifndef ALLOW_RUN_AS_ROOT |
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if (geteuid () == 0) |
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{ |
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fprintf (stderr, "VLC is not supposed to be run as root. Sorry.\n" |
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"If you need to use real-time priorities and/or privileged TCP ports\n" |
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"you can use %s-wrapper (make sure it is Set-UID root and\n" |
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"cannot be run by non-trusted users first).\n", ppsz_argv[0]); |
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return 1; |
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} |
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#endif |
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setlocale (LC_ALL, ""); |
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if (isatty (STDERR_FILENO)) |
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/* This message clutters error logs. It is printed only on a TTY.
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* Fortunately, LibVLC prints version info with -vv anyway. */ |
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fprintf (stderr, "VLC media player %s (revision %s)\n", |
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libvlc_get_version(), libvlc_get_changeset()); |
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sigset_t set; |
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sigemptyset (&set); |
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/* VLC uses sigwait() to dequeue interesting signals.
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* For this to work, those signals must be blocked in all threads, |
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* including the thread calling sigwait() (see the man page for details). |
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* |
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* There are two advantages to sigwait() over traditional signal handlers: |
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* - delivery is synchronous: no need to worry about async-safety, |
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* - EINTR is not generated: other threads need not handle that error. |
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* That being said, some LibVLC programs do not use sigwait(). Therefore |
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* EINTR must still be handled cleanly, notably from poll() calls. |
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* |
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* Signals that request a clean shutdown, and force an unclean shutdown |
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* if they are triggered again 2+ seconds later. |
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* We have to handle SIGTERM cleanly because of daemon mode. */ |
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sigaddset (&set, SIGINT); |
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sigaddset (&set, SIGHUP); |
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sigaddset (&set, SIGQUIT); |
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sigaddset (&set, SIGTERM); |
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/* SIGPIPE can happen and would crash the process. On modern systems,
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* the MSG_NOSIGNAL flag protects socket write operations against SIGPIPE. |
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* But we still need to block SIGPIPE when: |
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* - writing to pipes, |
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* - using write() instead of send() for code not specific to sockets. |
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* LibVLC code assumes that SIGPIPE is blocked. Other LibVLC applications |
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* shall block it (or handle it somehow) too. |
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*/ |
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sigaddset (&set, SIGPIPE); |
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/* SIGCHLD must be dequeued to clean up zombie child processes.
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* Furthermore the handler must not be set to SIG_IGN (see above). |
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* We cannot pragmatically handle EINTR, short reads and short writes |
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* in every code paths (including underlying libraries). So we just |
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* block SIGCHLD in all threads, and dequeue it below. */ |
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sigaddset (&set, SIGCHLD); |
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/* Block all these signals */ |
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pthread_t self = pthread_self (); |
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pthread_sigmask (SIG_SETMASK, &set, NULL); |
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const char *argv[i_argc + 2]; |
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int argc = 0; |
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argv[argc++] = "--no-ignore-config"; |
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argv[argc++] = "--media-library"; |
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ppsz_argv++; i_argc--; /* skip executable path */ |
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/* When VLC.app is run by double clicking in Mac OS X, the 2nd arg
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* is the PSN - process serial number (a unique PID-ish thingie) |
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* still ok for real Darwin & when run from command line |
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* for example -psn_0_9306113 */ |
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if (i_argc >= 1 && !strncmp (*ppsz_argv, "-psn" , 4)) |
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ppsz_argv++, i_argc--; |
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memcpy (argv + argc, ppsz_argv, i_argc * sizeof (*argv)); |
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argc += i_argc; |
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argv[argc] = NULL; |
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vlc_enable_override (); |
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/* Initialize libvlc */ |
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libvlc_instance_t *vlc = libvlc_new (argc, argv); |
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if (vlc == NULL) |
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return 1; |
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int ret = 1; |
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libvlc_set_exit_handler (vlc, vlc_kill, &self); |
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libvlc_set_app_id (vlc, "org.VideoLAN.VLC", PACKAGE_VERSION, PACKAGE_NAME); |
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libvlc_set_user_agent (vlc, "VLC media player", "VLC/"PACKAGE_VERSION); |
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libvlc_add_intf (vlc, "hotkeys,none"); |
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if (libvlc_add_intf (vlc, NULL)) |
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goto out; |
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libvlc_playlist_play (vlc, -1, 0, NULL); |
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/* Qt4 insists on catching SIGCHLD via signal handler. To work around that,
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* unblock it after all our child threads are created. */ |
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sigdelset (&set, SIGCHLD); |
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pthread_sigmask (SIG_SETMASK, &set, NULL); |
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/* Do not dequeue SIGHUP if it is ignored (nohup) */ |
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if (signal_ignored (SIGHUP)) |
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sigdelset (&set, SIGHUP); |
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/* Ignore SIGPIPE */ |
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sigdelset (&set, SIGPIPE); |
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int signum; |
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sigwait (&set, &signum); |
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/* Restore default signal behaviour after 3 seconds */ |
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sigemptyset (&set); |
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sigaddset (&set, SIGINT); |
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sigaddset (&set, SIGALRM); |
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signal (SIGINT, SIG_IGN); |
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signal (SIGALRM, exit_timeout); |
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pthread_sigmask (SIG_UNBLOCK, &set, NULL); |
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alarm (3); |
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ret = 0; |
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/* Cleanup */ |
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out: |
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libvlc_release (vlc); |
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return ret; |
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} |
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