mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-04 09:11:33 +02:00
283 lines
8.9 KiB
C
283 lines
8.9 KiB
C
/*****************************************************************************
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* vlc.c: the VLC player
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*****************************************************************************
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* Copyright (C) 1998-2013 the VideoLAN team
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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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#ifdef __OS2__
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# include <iconv.h>
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# define pthread_t int
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# define pthread_self() _gettid()
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static char *FromSystem(const void *str)
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{
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iconv_t handle = iconv_open ("UTF-8", "");
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if (handle == (iconv_t)(-1))
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return NULL;
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size_t str_len = strlen (str);
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char *out = NULL;
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for (unsigned mul = 4; mul < 8; mul++)
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{
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size_t in_size = str_len;
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const char *in = str;
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size_t out_max = mul * str_len;
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char *tmp = out = malloc (1 + out_max);
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if (!out)
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break;
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if (iconv (handle, &in, &in_size, &tmp, &out_max) != (size_t)(-1)) {
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*tmp = '\0';
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break;
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}
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free(out);
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out = NULL;
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if (errno != E2BIG)
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break;
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}
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iconv_close(handle);
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return out;
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}
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#endif
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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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#ifndef __OS2__
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pthread_t *ps = data;
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pthread_kill (*ps, SIGTERM);
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#else
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// send a signal to the main thread
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kill (getpid(), SIGTERM);
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#endif
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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 argc, const char *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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/* Disable the ugly Gnome crash dialog so that we properly segfault */
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setenv ("GNOME_DISABLE_CRASH_DIALOG", "1", 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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setenv ("VLC_LIB_PATH", TOP_BUILDDIR"/modules", 1);
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#endif
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/* Clear the X.Org startup notification ID. Otherwise the UI might try to
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* change the environment while the process is multi-threaded. That could
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* crash. Screw you X.Org. Next time write a thread-safe specification. */
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unsetenv ("DESKTOP_STARTUP_ID");
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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", 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 *args[argc + 3];
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int count = 0;
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args[count++] = "--no-ignore-config";
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args[count++] = "--media-library";
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#ifdef HAVE_DBUS
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args[count++] = "--dbus";
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#endif
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#ifdef __OS2__
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for (int i = 1; i < argc; i++)
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if ((args[count++] = FromSystem(argv[i])) == NULL)
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{
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fprintf (stderr, "Converting '%s' to UTF-8 failed.\n", argv[i]);
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return 1;
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}
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#else
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memcpy(args + count, argv + 1, (argc - 1) * sizeof (*argv));
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count += (argc - 1);
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#endif
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args[count] = NULL;
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vlc_enable_override ();
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/* Initialize libvlc */
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libvlc_instance_t *vlc = libvlc_new(count, args);
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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 !defined (__OS2__)
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libvlc_add_intf (vlc, "globalhotkeys,none");
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#endif
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if (libvlc_add_intf (vlc, NULL))
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{
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fprintf(stderr, "%s: cannot start any interface. Exiting.\n", argv[0]);
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goto out;
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}
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libvlc_playlist_play (vlc);
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/* Qt 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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#ifdef __OS2__
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for (int i = count - argc + 1; i < count; i++)
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free(args[i]);
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#endif
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return ret;
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}
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