VALUE rb_f_kill(int argc, const VALUE *argv) { #ifndef HAVE_KILLPG #define killpg(pg, sig) kill(-(pg), (sig)) #endif int negative = 0; int sig; int i; VALUE str; const char *s; rb_secure(2); rb_check_arity(argc, 2, UNLIMITED_ARGUMENTS); switch (TYPE(argv[0])) { case T_FIXNUM: sig = FIX2INT(argv[0]); break; case T_SYMBOL: str = rb_sym2str(argv[0]); goto str_signal; case T_STRING: str = argv[0]; str_signal: s = RSTRING_PTR(str); if (s[0] == '-') { negative++; s++; } if (strncmp(signame_prefix, s, sizeof(signame_prefix)) == 0) s += 3; if ((sig = signm2signo(s)) == 0) { long ofs = s - RSTRING_PTR(str); if (ofs) str = rb_str_subseq(str, ofs, RSTRING_LEN(str)-ofs); rb_raise(rb_eArgError, "unsupported name `SIG%"PRIsVALUE"'", str); } if (negative) sig = -sig; break; default: str = rb_check_string_type(argv[0]); if (!NIL_P(str)) { goto str_signal; } rb_raise(rb_eArgError, "bad signal type %s", rb_obj_classname(argv[0])); break; } if (argc <= 1) return INT2FIX(0); if (sig < 0) { sig = -sig; for (i=1; i<argc; i++) { if (killpg(NUM2PIDT(argv[i]), sig) < 0) rb_sys_fail(0); } } else { const rb_pid_t self = (GET_THREAD() == GET_VM()->main_thread) ? getpid() : -1; int wakeup = 0; for (i=1; i<argc; i++) { rb_pid_t pid = NUM2PIDT(argv[i]); if ((sig != 0) && (self != -1) && (pid == self)) { int t; /* * When target pid is self, many caller assume signal will be * delivered immediately and synchronously. */ switch (sig) { case SIGSEGV: #ifdef SIGBUS case SIGBUS: #endif #ifdef SIGKILL case SIGKILL: #endif #ifdef SIGSTOP case SIGSTOP: #endif ruby_kill(pid, sig); break; default: t = signal_ignored(sig); if (t) { if (t < 0 && kill(pid, sig)) rb_sys_fail(0); break; } signal_enque(sig); wakeup = 1; } } else if (kill(pid, sig) < 0) { rb_sys_fail(0); } } if (wakeup) { rb_threadptr_check_signal(GET_VM()->main_thread); } } rb_thread_execute_interrupts(rb_thread_current()); return INT2FIX(i-1); }
/***************************************************************************** * main: parse command line, start interface and spawn threads. *****************************************************************************/ int main( int i_argc, const char *ppsz_argv[] ) { /* The so-called POSIX-compliant MacOS X reportedly processes SIGPIPE even * if it is blocked in all thread. * Note: this is NOT an excuse for not protecting against SIGPIPE. If * LibVLC runs outside of VLC, we cannot rely on this code snippet. */ signal (SIGPIPE, SIG_IGN); /* Restore SIGCHLD in case our parent process ignores it. */ signal (SIGCHLD, SIG_DFL); #ifndef NDEBUG /* Activate malloc checking routines to detect heap corruptions. */ setenv ("MALLOC_CHECK_", "2", 1); /* Disable the ugly Gnome crash dialog so that we properly segfault */ setenv ("GNOME_DISABLE_CRASH_DIALOG", "1", 1); #endif #ifdef TOP_BUILDDIR setenv ("VLC_PLUGIN_PATH", TOP_BUILDDIR"/modules", 1); setenv ("VLC_DATA_PATH", TOP_SRCDIR"/share", 1); #endif /* Clear the X.Org startup notification ID. Otherwise the UI might try to * change the environment while the process is multi-threaded. That could * crash. Screw you X.Org. Next time write a thread-safe specification. */ unsetenv ("DESKTOP_STARTUP_ID"); #ifndef ALLOW_RUN_AS_ROOT if (geteuid () == 0) { fprintf (stderr, "VLC is not supposed to be run as root. Sorry.\n" "If you need to use real-time priorities and/or privileged TCP ports\n" "you can use %s-wrapper (make sure it is Set-UID root and\n" "cannot be run by non-trusted users first).\n", ppsz_argv[0]); return 1; } #endif setlocale (LC_ALL, ""); if (isatty (STDERR_FILENO)) /* This message clutters error logs. It is printed only on a TTY. * Fortunately, LibVLC prints version info with -vv anyway. */ fprintf (stderr, "VLC media player %s (revision %s)\n", libvlc_get_version(), libvlc_get_changeset()); sigset_t set; sigemptyset (&set); /* VLC uses sigwait() to dequeue interesting signals. * For this to work, those signals must be blocked in all threads, * including the thread calling sigwait() (see the man page for details). * * There are two advantages to sigwait() over traditional signal handlers: * - delivery is synchronous: no need to worry about async-safety, * - EINTR is not generated: other threads need not handle that error. * That being said, some LibVLC programs do not use sigwait(). Therefore * EINTR must still be handled cleanly, notably from poll() calls. * * Signals that request a clean shutdown, and force an unclean shutdown * if they are triggered again 2+ seconds later. * We have to handle SIGTERM cleanly because of daemon mode. */ sigaddset (&set, SIGINT); sigaddset (&set, SIGHUP); sigaddset (&set, SIGQUIT); sigaddset (&set, SIGTERM); /* SIGPIPE can happen and would crash the process. On modern systems, * the MSG_NOSIGNAL flag protects socket write operations against SIGPIPE. * But we still need to block SIGPIPE when: * - writing to pipes, * - using write() instead of send() for code not specific to sockets. * LibVLC code assumes that SIGPIPE is blocked. Other LibVLC applications * shall block it (or handle it somehow) too. */ sigaddset (&set, SIGPIPE); /* SIGCHLD must be dequeued to clean up zombie child processes. * Furthermore the handler must not be set to SIG_IGN (see above). * We cannot pragmatically handle EINTR, short reads and short writes * in every code paths (including underlying libraries). So we just * block SIGCHLD in all threads, and dequeue it below. */ sigaddset (&set, SIGCHLD); /* Block all these signals */ pthread_t self = pthread_self (); pthread_sigmask (SIG_SETMASK, &set, NULL); const char *argv[i_argc + 3]; int argc = 0; argv[argc++] = "--no-ignore-config"; argv[argc++] = "--media-library"; argv[argc++] = "--stats"; ppsz_argv++; i_argc--; /* skip executable path */ #ifdef __OS2__ for (int i = 0; i < i_argc; i++) if ((argv[argc++] = FromSystem (ppsz_argv[i])) == NULL) { fprintf (stderr, "Converting '%s' to UTF-8 failed.\n", ppsz_argv[i]); return 1; } #else memcpy (argv + argc, ppsz_argv, i_argc * sizeof (*argv)); argc += i_argc; #endif argv[argc] = NULL; vlc_enable_override (); /* Initialize libvlc */ libvlc_instance_t *vlc = libvlc_new (argc, argv); if (vlc == NULL) return 1; int ret = 1; libvlc_set_exit_handler (vlc, vlc_kill, &self); libvlc_set_app_id (vlc, "org.VideoLAN.VLC", PACKAGE_VERSION, PACKAGE_NAME); libvlc_set_user_agent (vlc, "VLC media player", "VLC/"PACKAGE_VERSION); libvlc_add_intf (vlc, "hotkeys,none"); #if !defined (__OS2__) libvlc_add_intf (vlc, "globalhotkeys,none"); #endif #ifdef HAVE_DBUS libvlc_add_intf (vlc, "dbus,none"); #endif if (libvlc_add_intf (vlc, NULL)) goto out; libvlc_playlist_play (vlc, -1, 0, NULL); /* Qt4 insists on catching SIGCHLD via signal handler. To work around that, * unblock it after all our child threads are created. */ sigdelset (&set, SIGCHLD); pthread_sigmask (SIG_SETMASK, &set, NULL); /* Do not dequeue SIGHUP if it is ignored (nohup) */ if (signal_ignored (SIGHUP)) sigdelset (&set, SIGHUP); /* Ignore SIGPIPE */ sigdelset (&set, SIGPIPE); int signum; sigwait (&set, &signum); /* Restore default signal behaviour after 3 seconds */ sigemptyset (&set); sigaddset (&set, SIGINT); sigaddset (&set, SIGALRM); signal (SIGINT, SIG_IGN); signal (SIGALRM, exit_timeout); pthread_sigmask (SIG_UNBLOCK, &set, NULL); alarm (3); ret = 0; /* Cleanup */ out: libvlc_release (vlc); #ifdef __OS2__ for (int i = argc - i_argc; i < argc; i++) free (argv[i]); #endif return ret; }
/***************************************************************************** * main: parse command line, start interface and spawn threads. *****************************************************************************/ int main( int i_argc, const char *ppsz_argv[] ) { /* The so-called POSIX-compliant MacOS X reportedly processes SIGPIPE even * if it is blocked in all thread. * Note: this is NOT an excuse for not protecting against SIGPIPE. If * LibVLC runs outside of VLC, we cannot rely on this code snippet. */ signal (SIGPIPE, SIG_IGN); /* Restore SIGCHLD in case our parent process ignores it. */ signal (SIGCHLD, SIG_DFL); #ifndef NDEBUG /* Activate malloc checking routines to detect heap corruptions. */ setenv ("MALLOC_CHECK_", "2", 1); #endif #ifdef TOP_BUILDDIR setenv ("VLC_PLUGIN_PATH", TOP_BUILDDIR"/modules", 1); setenv ("VLC_DATA_PATH", TOP_SRCDIR"/share", 1); #endif #ifndef ALLOW_RUN_AS_ROOT if (geteuid () == 0) { fprintf (stderr, "VLC is not supposed to be run as root. Sorry.\n" "If you need to use real-time priorities and/or privileged TCP ports\n" "you can use %s-wrapper (make sure it is Set-UID root and\n" "cannot be run by non-trusted users first).\n", ppsz_argv[0]); return 1; } #endif setlocale (LC_ALL, ""); if (isatty (STDERR_FILENO)) /* This message clutters error logs. It is printed only on a TTY. * Fortunately, LibVLC prints version info with -vv anyway. */ fprintf (stderr, "VLC media player %s (revision %s)\n", libvlc_get_version(), libvlc_get_changeset()); sigset_t set; sigemptyset (&set); /* VLC uses sigwait() to dequeue interesting signals. * For this to work, those signals must be blocked in all threads, * including the thread calling sigwait() (see the man page for details). * * There are two advantages to sigwait() over traditional signal handlers: * - delivery is synchronous: no need to worry about async-safety, * - EINTR is not generated: other threads need not handle that error. * That being said, some LibVLC programs do not use sigwait(). Therefore * EINTR must still be handled cleanly, notably from poll() calls. * * Signals that request a clean shutdown, and force an unclean shutdown * if they are triggered again 2+ seconds later. * We have to handle SIGTERM cleanly because of daemon mode. */ sigaddset (&set, SIGINT); sigaddset (&set, SIGHUP); sigaddset (&set, SIGQUIT); sigaddset (&set, SIGTERM); /* SIGPIPE can happen and would crash the process. On modern systems, * the MSG_NOSIGNAL flag protects socket write operations against SIGPIPE. * But we still need to block SIGPIPE when: * - writing to pipes, * - using write() instead of send() for code not specific to sockets. * LibVLC code assumes that SIGPIPE is blocked. Other LibVLC applications * shall block it (or handle it somehow) too. */ sigaddset (&set, SIGPIPE); /* SIGCHLD must be dequeued to clean up zombie child processes. * Furthermore the handler must not be set to SIG_IGN (see above). * We cannot pragmatically handle EINTR, short reads and short writes * in every code paths (including underlying libraries). So we just * block SIGCHLD in all threads, and dequeue it below. */ sigaddset (&set, SIGCHLD); /* Block all these signals */ pthread_t self = pthread_self (); pthread_sigmask (SIG_SETMASK, &set, NULL); const char *argv[i_argc + 3]; int argc = 0; argv[argc++] = "--no-ignore-config"; argv[argc++] = "--media-library"; argv[argc++] = "--stats"; /* overwrite system language on Mac */ #if !TARGET_OS_IPHONE && !TARGET_IPHONE_SIMULATOR // TARGET_OS_MAC is unspecific char *lang = NULL; for (int i = 0; i < i_argc; i++) { if (!strncmp(ppsz_argv[i], "--language", 10)) { lang = strstr(ppsz_argv[i], "="); ppsz_argv++, i_argc--; continue; } } if (lang && strncmp( lang, "auto", 4 )) { char tmp[11]; snprintf(tmp, 11, "LANG%s", lang); putenv(tmp); } if (!lang) { CFStringRef language; language = (CFStringRef)CFPreferencesCopyAppValue(CFSTR("language"), kCFPreferencesCurrentApplication); if (language) { CFIndex length = CFStringGetLength(language) + 1; if (length > 0) { CFIndex maxSize = CFStringGetMaximumSizeForEncoding(length, kCFStringEncodingUTF8); lang = (char *)malloc(maxSize); CFStringGetCString(language, lang, maxSize - 1, kCFStringEncodingUTF8); } if (strncmp( lang, "auto", 4 )) { char tmp[11]; snprintf(tmp, 11, "LANG=%s", lang); putenv(tmp); } CFRelease(language); } } #endif ppsz_argv++; i_argc--; /* skip executable path */ /* When VLC.app is run by double clicking in Mac OS X, the 2nd arg * is the PSN - process serial number (a unique PID-ish thingie) * still ok for real Darwin & when run from command line * for example -psn_0_9306113 */ if (i_argc >= 1 && !strncmp (*ppsz_argv, "-psn" , 4)) ppsz_argv++, i_argc--; memcpy (argv + argc, ppsz_argv, i_argc * sizeof (*argv)); argc += i_argc; argv[argc] = NULL; vlc_enable_override (); /* Initialize libvlc */ libvlc_instance_t *vlc = libvlc_new (argc, argv); if (vlc == NULL) return 1; int ret = 1; libvlc_set_exit_handler (vlc, vlc_kill, &self); libvlc_set_app_id (vlc, "org.VideoLAN.VLC", PACKAGE_VERSION, PACKAGE_NAME); libvlc_set_user_agent (vlc, "VLC media player", "VLC/"PACKAGE_VERSION); libvlc_add_intf (vlc, "hotkeys,none"); if (libvlc_add_intf (vlc, NULL)) goto out; libvlc_playlist_play (vlc, -1, 0, NULL); /* Qt4 insists on catching SIGCHLD via signal handler. To work around that, * unblock it after all our child threads are created. */ sigdelset (&set, SIGCHLD); pthread_sigmask (SIG_SETMASK, &set, NULL); /* Do not dequeue SIGHUP if it is ignored (nohup) */ if (signal_ignored (SIGHUP)) sigdelset (&set, SIGHUP); /* Ignore SIGPIPE */ sigdelset (&set, SIGPIPE); int signum; sigwait (&set, &signum); /* Restore default signal behaviour after 3 seconds */ sigemptyset (&set); sigaddset (&set, SIGINT); sigaddset (&set, SIGALRM); signal (SIGINT, SIG_IGN); signal (SIGALRM, exit_timeout); pthread_sigmask (SIG_UNBLOCK, &set, NULL); alarm (3); ret = 0; /* Cleanup */ out: libvlc_release (vlc); return ret; }