C++ sigemptyset函数代码示例

/* This stays around for as long as the initial process in the app does
 * and when that exits it exits, propagating the exit status. We do this
 * by having pid 1 in the sandbox detect this exit and tell the monitor
 * the exit status via a eventfd. We also track the exit of the sandbox
 * pid 1 via a signalfd for SIGCHLD, and exit with an error in this case.
 * This is to catch e.g. problems during setup. */
static void
monitor_child (int event_fd)
{
  int res;
  uint64_t val;
  ssize_t s;
  int signal_fd;
  sigset_t mask;
  struct pollfd fds[2];
  int num_fds;
  struct signalfd_siginfo fdsi;
  int dont_close[] = { event_fd, -1 };

  /* Close all extra fds in the monitoring process.
     Any passed in fds have been passed on to the child anyway. */
  fdwalk (proc_fd, close_extra_fds, dont_close);

  sigemptyset (&mask);
  sigaddset (&mask, SIGCHLD);

  signal_fd = signalfd (-1, &mask, SFD_CLOEXEC | SFD_NONBLOCK);
  if (signal_fd == -1)
    die_with_error ("Can't create signalfd");

  num_fds = 1;
  fds[0].fd = signal_fd;
  fds[0].events = POLLIN;
  if (event_fd != -1)
    {
      fds[1].fd = event_fd;
      fds[1].events = POLLIN;
      num_fds++;
    }

  while (1)
    {
      fds[0].revents = fds[1].revents = 0;
      res = poll (fds, num_fds, -1);
      if (res == -1 && errno != EINTR)
        die_with_error ("poll");

      /* Always read from the eventfd first, if pid 2 died then pid 1 often
       * dies too, and we could race, reporting that first and we'd lose
       * the real exit status. */
      if (event_fd != -1)
        {
          s = read (event_fd, &val, 8);
          if (s == -1 && errno != EINTR && errno != EAGAIN)
            die_with_error ("read eventfd");
          else if (s == 8)
            exit ((int)val - 1);
        }

      s = read (signal_fd, &fdsi, sizeof (struct signalfd_siginfo));
      if (s == -1 && errno != EINTR && errno != EAGAIN)
        die_with_error ("read signalfd");
      else if (s == sizeof(struct signalfd_siginfo))
        {
          if (fdsi.ssi_signo != SIGCHLD)
            die ("Read unexpected signal\n");
          exit (fdsi.ssi_status);
        }
    }
}

void*
audio_write_start(void *arg)
{
	int idle = 1;
	pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
	int len;
	sigset_t sigs;
	demux_attr_t *attr;
	video_info_t *vi;

	signal(SIGURG, sighandler);
	sigemptyset(&sigs);
	sigaddset(&sigs, SIGURG);
	pthread_sigmask(SIG_UNBLOCK, &sigs, NULL);

	pthread_mutex_lock(&mutex);

	printf("audio write thread started (pid %d)\n", getpid());
	pthread_cond_wait(&video_cond, &mutex);

	while (1) {
		while (seeking || jumping)
			pthread_cond_wait(&video_cond, &mutex);

		while (!video_playing) {
			pcm_decoded = 0;
			empty_ac3();
			if ( !(idle) ) {
				sem_post(&write_threads_idle_sem);
				idle = 1;
				printf("audio write thread sleeping...\n");
			}
			pthread_cond_wait(&video_cond, &mutex);
		}
		if ( idle ) {
			sem_wait(&write_threads_idle_sem);
			idle = 0;
			printf("audio write thread running\n");
		}

		if (running_replaytv) {
			attr = demux_get_attr(handle);
			vi = &attr->video.stats.info.video;
			if (attr->audio.type != audio_type) {
            // JBH: FIX ME: This code never gets hit
				audio_type = attr->audio.type;
				switch (audio_type) {
				case AUDIO_MODE_AC3:
				case AUDIO_MODE_PCM:
					audio_output = AV_AUDIO_PCM;
					printf("switch to PCM audio\n");
					break;
				default:
					av_set_audio_type(audio_type);
					audio_output = AV_AUDIO_MPEG;
					printf("switch to MPEG audio\n");
					break;
				}
				av_set_audio_output(audio_output);
			}
		}

		switch (audio_type) {
		case AUDIO_MODE_MPEG1_PES:
		case AUDIO_MODE_MPEG2_PES:
		case AUDIO_MODE_ES:
			if (jit_mode == 0) {
				if ((len=DEMUX_WRITE_AUDIO(handle, fd_audio)) > 0)
					pthread_cond_broadcast(&video_cond);
				else
					pthread_cond_wait(&video_cond, &mutex);
			} else {
			    int flags, duration;
			    len=DEMUX_JIT_WRITE_AUDIO(handle, fd_audio,
						get_cur_vid_stc(),jit_mode,
						&flags,&duration);
			    if(flags & 4)
			    {
				/*4 is the same as 1 followed by 2*/
				flags = (flags | 1 | 2) & ~4;
			    }
			    if(flags & 1)
			    {
				av_pause_video();
			    }
			    if((flags & 2) && !paused)
			    {
				if(duration <= 10)
				    video_unpause_timer_callback(pause_widget);
				else
				    mvpw_set_timer(pause_widget,
				       video_unpause_timer_callback, duration);
			    }
			    if(flags & 8)
			    {
				usleep(duration*1000);
			    }


			    if(len > 0)
//.........这里部分代码省略.........

int main(int argc, char *argv[])
{
	struct usb_serial_test	*serial;
	unsigned		size = 0;
	uint8_t			fixed = 0;
	int			if_num = 0;
	int			alt_set = 0;
	uint8_t			eprx = 0;
	uint8_t			eptx = 0;
	int			ret = 0;
	unsigned		vid = 0;
	unsigned		pid = 0;
	struct sigaction	sa;

	sa.sa_handler = signal_exit;
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = SA_RESTART;

	if (sigaction(SIGINT, &sa, NULL) == -1)
		printf("failed to handle signal\n");

	(void)	signal(SIGINT, signal_exit);

	while (ARRAY_SIZE(serial_opts)) {
		int		optidx = 0;
		int		opt;

	opt = getopt_long(argc, argv, "v:p:s:i:a:r:t:dhf", serial_opts, &optidx);
	if (opt < 0)
			break;

		switch (opt) {
		case 'v':
			vid = strtoul(optarg, NULL, 16);
			break;
		case 'p':
			pid = strtoul(optarg, NULL, 16);
			break;
		case 'r':
			eprx = strtol(optarg,NULL, 16);
			break;
		case 't':
			eptx = strtol(optarg, NULL, 16);
			break;
		case 'i':
			if_num = atoi(optarg);
			break;
		case 'a':
			alt_set = atoi(optarg);
			break;
		case 's':
			size = atoi(optarg);
			if (size == 0) {
				DBG("%s: can't do it with zero length buffer\n",
						__func__);
				ret = -EINVAL;
				goto err0;
			}
			break;
		case 'f':
			fixed = 1;
			break;
		case 'd':
			debug = 1;
			break;
		case 'h': /* FALLTHROUGH */
		default:
			usage(argv[0]);
			return 1;
		}
	}

	if (!vid || !pid) {
		fprintf(stderr, "%s: missing arguments\n"
			"Try `%s --help' for more information\n",
			argv[0], argv[0]);
		return 1;
	}

	serial = malloc(sizeof(*serial));
	if (!serial) {
		fprintf(stderr, "%s: unable to allocate memory\n", argv[0]);
		ret = -ENOMEM;
		goto err0;
	}

	memset(serial, 0x00, sizeof(*serial));

	serial->size = size;
	serial->eprx = eprx;
	serial->eptx = eptx;
	serial->interface_num = if_num;
	serial->alt_setting = alt_set;

	serial->write_mintput = MIN_TPUT;
	serial->read_mintput = MIN_TPUT;

	ret = alloc_and_init_buffer(serial);
	if (ret < 0) {
		fprintf(stderr, "%s: failed to allocate buffers\n", argv[0]);
//.........这里部分代码省略.........

int
main(int argc, char **argv)
{
	int ch;
	unsigned long i;
	int foreground, preserve;
	int error, pstat, status;
	int killsig = SIGTERM;
	pid_t pid, cpid;
	double first_kill;
	double second_kill;
	bool timedout = false;
	bool do_second_kill = false;
	bool child_done = false;
	struct sigaction signals;
	struct procctl_reaper_status info;
	struct procctl_reaper_kill killemall;
	int signums[] = {
		-1,
		SIGTERM,
		SIGINT,
		SIGHUP,
		SIGCHLD,
		SIGALRM,
		SIGQUIT,
	};

	foreground = preserve = 0;
	second_kill = 0;

	const struct option longopts[] = {
		{ "preserve-status", no_argument,       &preserve,    1 },
		{ "foreground",      no_argument,       &foreground,  1 },
		{ "kill-after",      required_argument, NULL,        'k'},
		{ "signal",          required_argument, NULL,        's'},
		{ "help",            no_argument,       NULL,        'h'},
		{ NULL,              0,                 NULL,         0 }
	};

	while ((ch = getopt_long(argc, argv, "+k:s:h", longopts, NULL)) != -1) {
		switch (ch) {
			case 'k':
				do_second_kill = true;
				second_kill = parse_duration(optarg);
				break;
			case 's':
				killsig = parse_signal(optarg);
				break;
			case 0:
				break;
			case 'h':
			default:
				usage();
				break;
		}
	}

	argc -= optind;
	argv += optind;

	if (argc < 2)
		usage();

	first_kill = parse_duration(argv[0]);
	argc--;
	argv++;

	if (!foreground) {
		/* Aquire a reaper */
		if (procctl(P_PID, getpid(), PROC_REAP_ACQUIRE, NULL) == -1)
			err(EX_OSERR, "Fail to acquire the reaper");
	}

	memset(&signals, 0, sizeof(signals));
	sigemptyset(&signals.sa_mask);

	if (killsig != SIGKILL && killsig != SIGSTOP)
		signums[0] = killsig;

	for (i = 0; i < sizeof(signums) / sizeof(signums[0]); i ++)
		sigaddset(&signals.sa_mask, signums[i]);

	signals.sa_handler = sig_handler;
	signals.sa_flags = SA_RESTART;

	for (i = 0; i < sizeof(signums) / sizeof(signums[0]); i ++)
		if (signums[i] != -1 && signums[i] != 0 &&
		    sigaction(signums[i], &signals, NULL) == -1)
			err(EX_OSERR, "sigaction()");

	signal(SIGTTIN, SIG_IGN);
	signal(SIGTTOU, SIG_IGN);

	pid = fork();
	if (pid == -1)
		err(EX_OSERR, "fork()");
	else if (pid == 0) {
		/* child process */
		signal(SIGTTIN, SIG_DFL);
		signal(SIGTTOU, SIG_DFL);
//.........这里部分代码省略.........

int main(int argc, char **argv)
{
    int sockfd, new_fd;  // listen on sock_fd, new connection on new_fd
    struct addrinfo hints, *servinfo, *p;
    struct sockaddr_storage their_addr; // connector's address information
    socklen_t sin_size;
    struct sigaction sa;
    int yes=1;
    char s[INET6_ADDRSTRLEN];
    int rv;
    int rtn;

    rtn = shared_memory_attach();
    mk_daemon(argc,argv);
    rtn = shared_memory_attach();
    memset(&hints, 0, sizeof hints);
    hints.ai_family = AF_UNSPEC;
    hints.ai_socktype = SOCK_STREAM;
    hints.ai_flags = AI_PASSIVE; // use my IP

    if ((rv = getaddrinfo(NULL, RAS_PORT, &hints, &servinfo)) != 0) {
        fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
        return 1;
    }
    // loop through all the results and bind to the first we can
    for(p = servinfo; p != NULL; p = p->ai_next) {
        if ((sockfd = socket(p->ai_family, p->ai_socktype,
                p->ai_protocol)) == -1) {
            perror("server: socket");
            continue;
        }

        if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &yes,
                sizeof(int)) == -1) {
            perror("setsockopt");
            exit(1);
        }

        if (bind(sockfd, p->ai_addr, p->ai_addrlen) == -1) {
            close(sockfd);
            perror("server: bind");
            continue;
        }

        break;
    }

    if (p == NULL)  {
        fprintf(stderr, "server: failed to bind\n");
        return 2;
    }

    freeaddrinfo(servinfo); // all done with this structure

    if (listen(sockfd, BACKLOG) == -1) {
        perror("listen");
        exit(1);
    }

    sa.sa_handler = sigchld_handler; // reap all dead processes
    sigemptyset(&sa.sa_mask);
    sa.sa_flags = SA_RESTART;
    if (sigaction(SIGCHLD, &sa, NULL) == -1) {
        perror("sigaction");
        exit(1);
    }

    if (!Daemon) printf("server: waiting for connections on port %s...\n",RAS_PORT);

    while(1) {  // main accept() loop
        sin_size = sizeof their_addr;
        new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size);
        if (new_fd == -1) {
            perror("accept");
            continue;
        }

        inet_ntop(their_addr.ss_family,
            get_in_addr((struct sockaddr *)&their_addr),
            s, sizeof s);
        if (!Daemon) printf("server: got connection from %s\n", s);

        if (!fork()) { // this is the child process
            close(sockfd); // child doesn't need the listener
            //if (send(new_fd, "Hello, world!\n", 13, 0) == -1)
                //perror("send");
            //close(new_fd);
            Sockfd = new_fd;
            rtn =  soc_listen(new_fd);
            exit(0);
        }
        close(new_fd);  // parent doesn't need this
    }
    return (0);
}

int main ( int argc, char **argv )
{
    extern QueueObject_t   *IndexQ;
    struct sigaction        sa;
    sigset_t                sigmsk;
    uint32                  count;

    GlobalAbort = false;

    /* Parse the command line options */
    MainParseArgs( argc, argv );

    mainThreadId = pthread_self();

    /* 
     * Setup the sigmasks for this thread (which is the parent to all others).
     * This will propogate to all children.
     */
    sigfillset( &sigmsk );
    sigdelset( &sigmsk, SIGUSR1 );
    sigdelset( &sigmsk, SIGUSR2 );
    sigdelset( &sigmsk, SIGINT );
    sigdelset( &sigmsk, SIGSEGV );
    sigdelset( &sigmsk, SIGILL );
    sigdelset( &sigmsk, SIGFPE );
    pthread_sigmask( SIG_SETMASK, &sigmsk, NULL );

    /* Start up the Logging thread */
    logging_initialize(FALSE);

    thread_register( &mainThreadId, "thread_main", NULL );

    /* Setup signal handler for SIGUSR1 (toggles Debug) */
    sa.sa_sigaction = (sigAction_t)logging_toggle_debug;
    sigemptyset( &sa.sa_mask );
    sa.sa_flags = SA_RESTART;
    sigaction( SIGUSR1, &sa, NULL );

    /* Setup the exit handler */
    atexit( MainDelayExit );

    /* Setup signal handler for SIGINT (shut down cleanly) */
    sa.sa_sigaction = signal_interrupt;
    sigemptyset( &sa.sa_mask );
    sa.sa_flags = SA_RESTART;
    sigaction( SIGINT, &sa, NULL );
    
    /* Setup signal handlers that are to be propogated to all threads */
    sa.sa_sigaction = signal_everyone;
    sigemptyset( &sa.sa_mask );
    sa.sa_flags = SA_RESTART | SA_SIGINFO;
    sigaction( SIGUSR2, &sa, NULL );

    /* Setup signal handlers for SEGV, ILL, FPE */
    sa.sa_sigaction = signal_death;
    sigemptyset( &sa.sa_mask );
    sa.sa_flags = SA_RESTART | SA_SIGINFO;
    sigaction( SIGSEGV, &sa, NULL );
    sigaction( SIGILL, &sa, NULL );
    sigaction( SIGFPE, &sa, NULL );

    /* Print the startup log messages */
    LogBanner();

    /* Setup the CLucene indexer */
    clucene_init(1);

    /* Setup the MySQL connection */
    db_setup();
    db_check_schema_main();

    db_rebuild_clucene();

    /* Wait for the clucene thread to finish emptying its queue */
    while( (count = QueueUsed( IndexQ )) > 0 ) {
        LogPrint( LOG_INFO, "%d left", count );
        sleep( 1 );
    }

    GlobalAbort = TRUE;

    return(0);
}

    //----------------------------------------------------------------------
    void Demonizer::startWithMonitoring(int(*startFunc)(void),
                                        int(*stopFunc)(void), int(*rereadCfgFun)(void)) {

        this->ms_startFunc = startFunc;
        this->ms_stopFunc = stopFunc;
        this->ms_rereadCfgFun = rereadCfgFun;

        int pid = 0;
        int status = 0;
        int need_start = 1;
        sigset_t sigset;
        siginfo_t siginfo;
        sigemptyset(&sigset);
        sigaddset(&sigset, SIGQUIT);
        sigaddset(&sigset, SIGINT);
        //sigaddset(&sigset, SIGTERM);
        //sigaddset(&sigset, SIGCHLD);
        sigaddset(&sigset, SIGCHLD);
        sigprocmask(SIG_BLOCK, &sigset, NULL);

        for (; ;) {
            if (need_start) {
                pid = fork();
                if (pid != 0) {
                    sysLogger.log("Fork with pid=" + Logger::itos(pid));

                    if (SystemTools::checkRunningAndSavePID(getName() + "_worker", pid)) {
                        sysLogger.log("worker daemon is already running");
                        exit(CHILD_NEED_TERMINATE);
                    }
                }
            }
            need_start = 1;
            if (pid == -1) {
                sysLogger.log("Monitor: fork failed with " + std::string(strerror(errno)));
            } else if (!pid) {
                //we are child
                status = this->workProc();
                exit(status);
            } else {// parent

                sigwaitinfo(&sigset, &siginfo);
                sysLogger.log("Monitor: wait status...");
                if (siginfo.si_signo == SIGCHLD) {

                    sysLogger.log("Monitor: got child status...");
                    wait(&status);

                    sysLogger.log("Monitor: got exit status");

                    status = WEXITSTATUS(status);
                    if (status == CHILD_NEED_TERMINATE) {
                        sysLogger.log("Monitor: children stopped");
                        break;
                    } else if (status == CHILD_NEED_RESTART) {// restart
                        sysLogger.log("Monitor: children restart");
                    }
                } else if (siginfo.si_signo == SIGUSR1) {//reread config
                    sysLogger.log("Monitor: resend signal to pid=" + Logger::itos(pid));
                    kill(pid, SIGUSR1); //resend signal
                    need_start = 0; //don't restart
                } else {
                    sysLogger.log("Monitor: signal " + std::string(strsignal(siginfo.si_signo)));
                    //kill child
                    kill(pid, SIGTERM);
                    status = 0;
                    break;
                }
            }
        }
        sysLogger.log("Monitor: stopped");
        //delete pid file
        //unlink(calculateFilenameToStorePID(this->getName()));
    }

static unsigned char *bktr_device_init(struct video_dev *viddev, int width, int height,
                                unsigned input, unsigned norm, unsigned long freq)
{
    int dev_bktr = viddev->fd_device;
    struct sigaction act, old;
    //int dev_tunner = viddev->fd_tuner;
    /* to ensure that all device will be support the capture mode
      _TODO_ : Autodected the best capture mode .
    */
    int dummy = 1;
    //    int pixelformat = BSD_VIDFMT_I420;

    void *map;

    /* If we have choose the tuner is needed to setup the frequency. */
    if ((viddev->tuner_device != NULL) && (input == BKTR_IN_TV)) {
        if (!freq) {
            MOTION_LOG(WRN, TYPE_VIDEO, NO_ERRNO, "%s: Not valid Frequency [%lu] for "
                       "Source input [%i]", freq, input);
            return NULL;
        } else if (bktr_set_freq(viddev, freq) == -1) {
            MOTION_LOG(NTC, TYPE_VIDEO, NO_ERRNO, "%s: Frequency [%lu] Source input [%i]",
                       freq, input);
            return NULL;
        }
    }

    /* FIXME if we set as input tuner , we need to set option for tuner not for bktr */
    if ((dummy = bktr_set_input_device(viddev, input)) == -1) {
        MOTION_LOG(NTC, TYPE_VIDEO, NO_ERRNO, "%s: set input [%d]", input);
        return NULL;
    }

    viddev->input = dummy;

    if ((dummy = bktr_set_input_format(viddev, norm)) == -1) {
        MOTION_LOG(NTC, TYPE_VIDEO, NO_ERRNO, "%s: set input format [%d]",
                   norm);
        return NULL;
    }

    viddev->norm = dummy;

    if (bktr_set_geometry(viddev, width, height) == -1) {
        MOTION_LOG(NTC, TYPE_VIDEO, NO_ERRNO, "%s: set geometry [%d]x[%d]",
                   width, height);
        return NULL;
    }

    if (freq) {
        MOTION_LOG(WRN, TYPE_VIDEO, NO_ERRNO, "%s: Frequency set (no implemented yet");

    }

    /*
     * Set capture mode and capture buffers
     * That is the buffer size for capture images ,
     * so is dependent of color space of input format / FIXME
     */
    viddev->v4l_bufsize = (((width * height * 3 / 2)) * sizeof(unsigned char));
    viddev->v4l_fmt = VIDEO_PALETTE_YUV420P;


    map = mmap((caddr_t)0, viddev->v4l_bufsize, PROT_READ|PROT_WRITE, MAP_SHARED,
               dev_bktr, (off_t)0);

    if (map == MAP_FAILED) {
        MOTION_LOG(ERR, TYPE_VIDEO, SHOW_ERRNO, "%s: mmap failed");
        return NULL;
    }

    /* FIXME double buffer */
    if (0) {
        viddev->v4l_maxbuffer = 2;
        viddev->v4l_buffers[0] = map;
        viddev->v4l_buffers[1] = (unsigned char *)map + 0; /* 0 is not valid just a test */
        //viddev->v4l_buffers[1] = map+vid_buf.offsets[1];
    } else {
        viddev->v4l_buffers[0] = map;
        viddev->v4l_maxbuffer = 1;
    }

    viddev->v4l_curbuffer = 0;

    /* Clear the buffer */
    if (ioctl(dev_bktr, BT848SCBUF, &dummy) < 0) {
        MOTION_LOG(ERR, TYPE_VIDEO, SHOW_ERRNO, "%s: BT848SCBUF");
        return NULL;
    }

    /* Signal handler to know when data is ready to be read() */
    memset(&act, 0, sizeof(act));
    sigemptyset(&act.sa_mask);
    act.sa_handler = catchsignal;
    sigaction(SIGUSR2, &act, &old);

    dummy = SIGUSR2;

    //viddev->capture_method = METEOR_CAP_CONTINOUS;
    //viddev->capture_method = METEOR_CAP_SINGLE;
//.........这里部分代码省略.........

static bool gfx_ctx_drm_egl_set_video_mode(void *data,
      unsigned width, unsigned height,
      bool fullscreen)
{
   static const EGLint egl_attribs_gl[] = {
      DRM_EGL_ATTRIBS_BASE,
      EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
      EGL_NONE,
   };

   static const EGLint egl_attribs_gles[] = {
      DRM_EGL_ATTRIBS_BASE,
      EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
      EGL_NONE,
   };

#ifdef EGL_KHR_create_context
   static const EGLint egl_attribs_gles3[] = {
      DRM_EGL_ATTRIBS_BASE,
      EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT_KHR,
      EGL_NONE,
   };
#endif

   static const EGLint egl_attribs_vg[] = {
      DRM_EGL_ATTRIBS_BASE,
      EGL_RENDERABLE_TYPE, EGL_OPENVG_BIT,
      EGL_NONE,
   };

   const EGLint *attrib_ptr;
   EGLint major, minor, n, egl_attribs[16], *attr;
   float refresh_mod;
   int i, ret = 0;
   struct sigaction sa = {{0}};
   struct drm_fb *fb = NULL;
   driver_t *driver     = driver_get_ptr();
   settings_t *settings = config_get_ptr();
   gfx_ctx_drm_egl_data_t *drm = (gfx_ctx_drm_egl_data_t*)
      driver->video_context_data;

   if (!drm)
      return false;

   sa.sa_handler = sighandler;
   sa.sa_flags   = SA_RESTART;
   sigemptyset(&sa.sa_mask);
   sigaction(SIGINT, &sa, NULL);
   sigaction(SIGTERM, &sa, NULL);

   switch (g_api)
   {
      case GFX_CTX_OPENGL_API:
         attrib_ptr = egl_attribs_gl;
         break;
      case GFX_CTX_OPENGL_ES_API:
#ifdef EGL_KHR_create_context
         if (g_major >= 3)
            attrib_ptr = egl_attribs_gles3;
         else
#endif
         attrib_ptr = egl_attribs_gles;
         break;
      case GFX_CTX_OPENVG_API:
         attrib_ptr = egl_attribs_vg;
         break;
      default:
         attrib_ptr = NULL;
   }

   /* If we use black frame insertion, 
    * we fake a 60 Hz monitor for 120 Hz one, etc, so try to match that. */
   refresh_mod = settings->video.black_frame_insertion ? 0.5f : 1.0f;

   /* Find desired video mode, and use that.
    * If not fullscreen, we get desired windowed size, 
    * which is not appropriate. */
   if ((width == 0 && height == 0) || !fullscreen)
      drm->g_drm_mode = &drm->g_connector->modes[0];
   else
   {
      /* Try to match settings->video.refresh_rate as closely as possible.
       * Lower resolutions tend to have multiple supported 
       * refresh rates as well.
       */
      float minimum_fps_diff = 0.0f;

      /* Find best match. */
      for (i = 0; i < drm->g_connector->count_modes; i++)
      {
         float diff;
         if (width != drm->g_connector->modes[i].hdisplay || 
               height != drm->g_connector->modes[i].vdisplay)
            continue;

         diff = fabsf(refresh_mod * drm->g_connector->modes[i].vrefresh
               - settings->video.refresh_rate);

         if (!drm->g_drm_mode || diff < minimum_fps_diff)
         {
//.........这里部分代码省略.........

/******************************************************************************
 *                                                                            *
 * Function: daemon_start                                                     *
 *                                                                            *
 * Purpose: init process as daemon                                            *
 *                                                                            *
 * Parameters: allow_root - allow root permission for application             *
 *                                                                            *
 * Author: Alexei Vladishev                                                   *
 *                                                                            *
 * Comments: it doesn't allow running under 'root' if allow_root is zero      *
 *                                                                            *
 ******************************************************************************/
int	daemon_start(int allow_root)
{
	pid_t			pid;
	struct passwd		*pwd;
	struct sigaction	phan;
	char			user[7] = "zabbix";

	/* running as root ? */
	if (0 == allow_root && (0 == getuid() || 0 == getgid()))
	{
		pwd = getpwnam(user);
		if (NULL == pwd)
		{
			zbx_error("user %s does not exist", user);
			zbx_error("Cannot run as root!");
			exit(FAIL);
		}

		if (-1 == setgid(pwd->pw_gid))
		{
			zbx_error("cannot setgid to %s: %s", user, zbx_strerror(errno));
			exit(FAIL);
		}

#ifdef HAVE_FUNCTION_INITGROUPS
		if (-1 == initgroups(user, pwd->pw_gid))
		{
			zbx_error("cannot initgroups to %s: %s", user, zbx_strerror(errno));
			exit(FAIL);
		}
#endif

		if (-1 == setuid(pwd->pw_uid))
		{
			zbx_error("cannot setuid to %s: %s", user, zbx_strerror(errno));
			exit(FAIL);
		}

#ifdef HAVE_FUNCTION_SETEUID
		if (-1 == setegid(pwd->pw_gid) || -1 == seteuid(pwd->pw_uid))
		{
			zbx_error("cannot setegid or seteuid to %s: %s", user, zbx_strerror(errno));
			exit(FAIL);
		}
#endif
	}

	if (0 != (pid = zbx_fork()))
		exit(0);

	setsid();

	signal(SIGHUP, SIG_IGN);

	if (0 != (pid = zbx_fork()))
		exit(0);

	/* this is to eliminate warning: ignoring return value of chdir */
	if (-1 == chdir("/"))
		assert(0);

	umask(0002);

	redirect_std(CONFIG_LOG_FILE);

#ifdef HAVE_SYS_RESOURCE_SETPRIORITY
	if (0 != setpriority(PRIO_PROCESS, 0, 5))
		zbx_error("Unable to set process priority to 5. Leaving default.");
#endif

/*------------------------------------------------*/

	if (FAIL == create_pid_file(CONFIG_PID_FILE))
		exit(FAIL);

	parent_pid = (int)getpid();

	phan.sa_sigaction = child_signal_handler;
	sigemptyset(&phan.sa_mask);
	phan.sa_flags = SA_SIGINFO;

	sigaction(SIGINT, &phan, NULL);
	sigaction(SIGQUIT, &phan, NULL);
	sigaction(SIGTERM, &phan, NULL);
	sigaction(SIGPIPE, &phan, NULL);
	sigaction(SIGILL, &phan, NULL);
	sigaction(SIGFPE, &phan, NULL);
//.........这里部分代码省略.........

//.........这里部分代码省略.........
      }
    }

    getrlimit(RLIMIT_NOFILE, &limit);
#ifndef HAVE_FSEVENTS
    if (limit.rlim_cur < 10240) {
      w_log(W_LOG_ERR,
          "Your file descriptor limit is very low (%" PRIu64 "), "
          "please consult the watchman docs on raising the limits\n",
          limit.rlim_cur);
    }
#endif
  }
#endif

  proc_pid = (int)getpid();
  if (gettimeofday(&tv, NULL) == -1) {
    w_log(W_LOG_ERR, "gettimeofday failed: %s\n", strerror(errno));
    return false;
  }
  proc_start_time = (uint64_t)tv.tv_sec;

  signal(SIGPIPE, SIG_IGN);

  /* allow SIGUSR1 and SIGCHLD to wake up a blocked thread, without restarting
   * syscalls */
  memset(&sa, 0, sizeof(sa));
  sa.sa_handler = wakeme;
  sa.sa_flags = 0;
  sigaction(SIGUSR1, &sa, NULL);
  sigaction(SIGCHLD, &sa, NULL);

  // Block SIGCHLD everywhere
  sigemptyset(&sigset);
  sigaddset(&sigset, SIGCHLD);
  sigprocmask(SIG_BLOCK, &sigset, NULL);

  pthread_attr_init(&attr);
  pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);

  listener_fd = get_listener_socket(path);
  if (listener_fd == -1) {
    return false;
  }
  w_set_cloexec(listener_fd);

  if (pthread_create(&reaper_thread, NULL, child_reaper, NULL)) {
    w_log(W_LOG_FATAL, "pthread_create(reaper): %s\n",
        strerror(errno));
    return false;
  }

  if (!clients) {
    clients = w_ht_new(2, &client_hash_funcs);
  }

  w_state_load();

#ifdef HAVE_LIBGIMLI_H
  if (hb) {
    gimli_heartbeat_set(hb, GIMLI_HB_RUNNING);
  } else {
    w_setup_signal_handlers();
  }
#else
  w_setup_signal_handlers();

//.........这里部分代码省略.........
				err(1, "cannot attach event %s: precise mode may not be supported", fds[i].name);
			err(1, "cannot attach event %s", fds[i].name);
		}
	}

	/*
	 * kernel adds the header page to the size of the mmapped region
	 */
	fds[0].buf = mmap(NULL, map_size, PROT_READ|PROT_WRITE, MAP_SHARED, fds[0].fd, 0);
	if (fds[0].buf == MAP_FAILED)
		err(1, "cannot mmap buffer");

	/* does not include header page */
	fds[0].pgmsk = (options.mmap_pages*pgsz)-1;

	/*
	 * send samples for all events to first event's buffer
	 */
	for (i = 1; i < num_fds; i++) {
		if (!fds[i].hw.sample_period)
			continue;
		ret = ioctl(fds[i].fd, PERF_EVENT_IOC_SET_OUTPUT, fds[0].fd);
		if (ret)
			err(1, "cannot redirect sampling output");
	}

	if (num_fds > 1 && fds[0].fd > -1) {
		for(i = 0; i < num_fds; i++) {
			/*
			 * read the event identifier using ioctl
			 * new method replaced the trick with PERF_FORMAT_GROUP + PERF_FORMAT_ID + read()
			 */
			ret = ioctl(fds[i].fd, PERF_EVENT_IOC_ID, &fds[i].id);
			if (ret == -1)
				err(1, "cannot read ID");
			fprintf(options.output_file,"ID %"PRIu64"  %s\n", fds[i].id, fds[i].name);
		}
	}

	pollfds[0].fd = fds[0].fd;
	pollfds[0].events = POLLIN;
	
	for(i=0; i < num_fds; i++) {
		ret = ioctl(fds[i].fd, PERF_EVENT_IOC_ENABLE, 0);
		if (ret)
			err(1, "cannot enable event %s\n", fds[i].name);
	}
	signal(SIGCHLD, cld_handler);

	close(go[1]);

	if (setjmp(jbuf) == 1)
		goto terminate_session;

	sigemptyset(&bmask);
	sigaddset(&bmask, SIGCHLD);

	/*
	 * core loop
	 */
	for(;;) {
		ret = poll(pollfds, 1, -1);
		if (ret < 0 && errno == EINTR)
			break;
		ovfl_count++;
		ret = sigprocmask(SIG_SETMASK, &bmask, NULL);
		if (ret)
			err(1, "setmask");
		process_smpl_buf(&fds[0]);
		ret = sigprocmask(SIG_UNBLOCK, &bmask, NULL);
		if (ret)
			err(1, "unblock");
	}
terminate_session:
	/*
	 * cleanup child
	 */
	wait4(pid, &status, 0, NULL);

	for(i=0; i < num_fds; i++)
		close(fds[i].fd);

	/* check for partial event buffer */
	process_smpl_buf(&fds[0]);
	munmap(fds[0].buf, map_size);

	perf_free_fds(fds, num_fds);

	fprintf(options.output_file,
		"%"PRIu64" samples collected in %"PRIu64" poll events, %"PRIu64" lost samples\n",
		collected_samples,
		ovfl_count, lost_samples);

	/* free libpfm resources cleanly */
	pfm_terminate();

	fclose(options.output_file);

	return 0;
}

static void run_monitored(char *executable, int argc, char **argv) {
  int pid;
  const char *t = getenv("KLEE_REPLAY_TIMEOUT");  
  if (!t)
    t = "10000000";  
  monitored_timeout = atoi(t);
  
  if (monitored_timeout==0) {
    fprintf(stderr, "ERROR: invalid timeout (%s)\n", t);
    _exit(1);
  }

  /* Kill monitored process(es) on SIGINT and SIGTERM */
  signal(SIGINT, int_handler);
  signal(SIGTERM, int_handler);
  
  signal(SIGALRM, timeout_handler);
  pid = fork();
  if (pid < 0) {
    perror("fork");
    _exit(66);
  } else if (pid == 0) {
    /* This process actually executes the target program.
     *  
     * Create a new process group for pid, and the process tree it may spawn. We
     * do this, because later on we might want to kill pid _and_ all processes
     * spawned by it and its descendants.
     */
    setpgrp();

    if (!rootdir) {
      execv(executable, argv);
      perror("execv");
      _exit(66);
    }

    fprintf(stderr, "rootdir: %s\n", rootdir);
    const char *msg;
    if ((msg = "chdir", chdir(rootdir) == 0) &&
      (msg = "chroot", chroot(rootdir) == 0)) {
      msg = "execv";
      executable = strip_root_dir(executable, rootdir);
      argv[0] = strip_root_dir(argv[0], rootdir);
      execv(executable, argv);
    }
    perror(msg);
    _exit(66);
  } else {
    /* Parent process which monitors the child. */
    int res, status;
    time_t start = time(0);
    sigset_t masked;

    sigemptyset(&masked);
    sigaddset(&masked, SIGALRM);

    monitored_pid = pid;
    alarm(monitored_timeout);
    do {
      res = waitpid(pid, &status, 0);
    } while (res < 0 && errno == EINTR);

    if (res < 0) {
      perror("waitpid");
      _exit(66);
    }
    
    /* Just in case, kill the process group of pid.  Since we called setpgrp()
       for pid, this will not kill us, or any of our ancestors */
    kill(-pid, SIGKILL);
    process_status(status, time(0) - start, 0);
  }
}

int
main(int argc, char *argv[])
{
    struct sigaction sa;
    int fd, events, fnum;
    const int NOTIFY_SIG = SIGRTMIN;
    char *p;

    if (argc < 2 || strcmp(argv[1], "--help") == 0)
        usageError(argv[0], NULL);

    /* Establish handler for notification signal */

    sa.sa_sigaction = handler;
    sigemptyset(&sa.sa_mask);
    sa.sa_flags = SA_SIGINFO;           /* So handler gets siginfo_t arg. */
    if (sigaction(NOTIFY_SIG, &sa, NULL) == -1)
        errExit("sigaction");

    for (fnum = 1; fnum < argc; fnum++) {
        p = strchr(argv[fnum], ':');    /* Look for optional ':' */

        if (p == NULL) {                /* Default is all events + multishot */
            events = DN_ACCESS | DN_ATTRIB | DN_CREATE | DN_DELETE |
                     DN_MODIFY | DN_RENAME | DN_MULTISHOT;
        } else {                        /* ':' present, parse event chars */
            *p = '\0';                  /* Terminates directory component */
            events = 0;
            for (p++; *p != '\0'; p++) {
                switch (*p) {
                case 'a': events |= DN_ACCESS;          break;
                case 'A': events |= DN_ATTRIB;          break;
                case 'c': events |= DN_CREATE;          break;
                case 'd': events |= DN_DELETE;          break;
                case 'm': events |= DN_MODIFY;          break;
                case 'r': events |= DN_RENAME;          break;
                case 'M': events |= DN_MULTISHOT;       break;
                default:  usageError(argv[0], "Bad event character\n");
                }
            }
        }

        /* Obtain a file descriptor for the directory to be monitored */

        fd = open(argv[fnum], O_RDONLY);
        if (fd == -1)
            errExit("open");
        printf("opened '%s' as file descriptor %d\n", argv[fnum], fd);

        /* Use alternate signal instead of SIGIO for dnotify events */

        if (fcntl(fd, F_SETSIG, NOTIFY_SIG) == -1)
            errExit("fcntl - F_SETSIG");

        /* Enable directory change notifications */

        if (fcntl(fd, F_NOTIFY, events) == -1)
            errExit("fcntl-F_NOTIFY");
        printf("events: %o\n", (unsigned int) events);
    }

    for (;;)
        pause();                        /* Wait for events */
}

int
main(int argc, char **argv)
{				/*Main program */
    int cellNum;		/*Cell entry number */
    int rc;			/*Return value from U_CellGetLocalTokens */
    time_t current_time;	/*Current time of day */
    time_t tokenExpireTime;	/*When token expires */
    char *expireString;		/*Char string of expiration time */
    char UserName[MAXKTCNAMELEN * 2 + 2]; /*Printable user name */
    char *cellName;
    struct ktc_principal clientName;	/* service name for ticket */
    struct ktc_token token;	/* the token we're printing */
    struct ktc_setTokenData *tokenSet;

#ifdef	AFS_AIX32_ENV
    /*
     * The following signal action for AIX is necessary so that in case of a
     * crash (i.e. core is generated) we can include the user's data section
     * in the core dump. Unfortunately, by default, only a partial core is
     * generated which, in many cases, isn't too useful.
     */
    struct sigaction nsa;

    sigemptyset(&nsa.sa_mask);
    nsa.sa_handler = SIG_DFL;
    nsa.sa_flags = SA_FULLDUMP;
    sigaction(SIGSEGV, &nsa, NULL);
#endif

    /* has no args ... support for help flag */

    if (argc > 1) {
	/* syntax from AFS Com Ref Man p9-39 */

	printf("Usage: tokens [-help]\n");
	fflush(stdout);
	exit(0);
    }

    printf("\nTokens held by the Cache Manager:\n\n");
    cellNum = 0;
    current_time = time(0);
    while (1) {
	rc = ktc_ListTokensEx(cellNum, &cellNum, &cellName);
	if (rc) {
	    /* only error is now end of list */
	    printf("   --End of list--\n");
	    break;
	} else {
	    /* get the ticket info itself */
	    rc = ktc_GetTokenEx(cellName, &tokenSet);
	    if (rc) {
		printf
		    ("tokens: failed to get token info for cell %s (code %d)\n",
		     cellName, rc);
		continue;
	    }
	    rc = token_extractRxkad(tokenSet, &token, NULL, &clientName);
	    if (rc == 0) {
		tokenExpireTime = token.endTime;
		strcpy(UserName, clientName.name);
		if (clientName.instance[0] != 0) {
		    strcat(UserName, ".");
		    strcat(UserName, clientName.instance);
		}
	        if (UserName[0] == 0)
		    printf("rxkad Tokens");
		else if (strncmp(UserName, "AFS ID", 6) == 0) {
		    printf("User's (%s) rxkad tokens", UserName);
	        } else if (strncmp(UserName, "Unix UID", 8) == 0) {
		    printf("RxkadTokens");
		} else
		    printf("User %s's rxkad tokens", UserName);
		printf(" for %s ", cellName);
		if (tokenExpireTime <= current_time)
		    printf("[>> Expired <<]\n");
		else {
		    expireString = ctime(&tokenExpireTime);
		    expireString += 4;	/*Move past the day of week */
		    expireString[12] = '\0';
		    printf("[Expires %s]\n", expireString);
	        }
	    }
	    token_FreeSet(&tokenSet);
	}
    }
    exit(0);
}				/*Main program */