示例#1
0
void *readT(){

    	int readRes =1;
	char x='\0';

	while(readRes){
		if(pipe_size==1){
			if(pipe_wait==0){
				printf("Pipe buf is empty\n");
				while(pipe_wait==0){}
			}
			readRes=pipe_read(&x);
			pipe_wait=0;
			printf("Pipe read char: %c\n", x);
		}else{
			while(i_read==i_write){
				printf("Pipe buf is empty\n");
				pipe_wait=0;
				while(pipe_wait==0){}
			}
			readRes=pipe_read(&x);
			if(readRes==0)break;
			pipe_wait=0;
			printf("Pipe read char: %c\n", x);
			i_read=(i_read+1)%pipe_size;
		}
	}
	pipe_wait = 2;
        return NULL;
}
示例#2
0
static void *log_commit_thread (void *arg)
{
   INFO0 ("started");
   while (1)
   {
       int ret = util_timed_wait_for_fd (logger_fd[0], 5000);
       if (ret == 0) continue;
       if (ret > 0)
       {
           char cm[80];
           ret = pipe_read (logger_fd[0], cm, sizeof cm);
           if (ret > 0)
           {
               // fprintf (stderr, "logger woken with %d\n", ret);
               log_commit_entries ();
               continue;
           }
       }
       if (ret < 0 && sock_recoverable (sock_error()))
           continue;
       int err = sock_error();
       sock_close (logger_fd[0]);
       sock_close (logger_fd[1]);
       if (worker_count)
       {
           worker_control_create (logger_fd);
           ERROR1 ("logger received code %d", err);
           continue;
       }
       // fprintf (stderr, "logger closed with zero workers\n");
       break;
   }
   return NULL;
}
示例#3
0
文件: read.c 项目: codyd51/axle
uint32_t read(int fd, void* buf, uint32_t count) {
	if (!tasking_installed()) {
		return -1;
	}
	if (!count) {
		return 0;
	}

	unsigned char* chbuf = buf;
	memset(chbuf, 0, count);

	//find fd_entry corresponding to this fd
	task_t* current = task_with_pid(getpid());
	fd_entry ent = current->fd_table[fd];
	if (fd_empty(ent)) {
		//errno = EBADF;
		return -1;
	}

	//what type of file descriptor is this?
	//dispatch appropriately
	switch (ent.type) {
		case STD_TYPE:
			return std_read(current, fd, buf, count);
		case FILE_TYPE:
			return fread(buf, sizeof(char), count, (FILE*)ent.payload);
		case PIPE_TYPE:
		default:
			return pipe_read(fd, buf, count);
	}
	return -1;
}
示例#4
0
int get_work(int fp)
{
	int read_size;
	char buf[128];
	
	while ((read_size = pipe_read(fp, buf)) < 1);
	
	buf[read_size] = 0;
	printf("Buff Read %d bytes: %s\n", read_size, buf);
	
	if (!strncmp(buf, "CMD_LISTEN", read_size))
		return CMD_LISTEN;
	
	if (!strncmp(buf, "CMD_CONNECT", read_size))
		return CMD_CONNECT;
	
	if (!strncmp(buf, "CMD_SEND_PKT", read_size))
		return CMD_SEND_PKT;
	
	if (strstr(buf, "CMD_CHNG_WINDOW_SIZE") != NULL)
	{
		/* return the first char after the '=' token */
		char *new_window_sz_str = (strstr(buf, "="));
		window_size = atoi(++new_window_sz_str);
		
		return CMD_CHNG_WINDOW_SIZE;
	}
		
	
	return -1;
}
示例#5
0
/*
 * Wrapper around pread() that checks for errors and keeps retrying until all
 * requested bytes have been read or until end-of file has occurred.  This also
 * transparently handle reading from pipe files, but the caller needs to be sure
 * the requested offset is greater than or equal to the current offset, or else
 * WIMLIB_ERR_RESOURCE_ORDER will be returned.
 *
 * Return values:
 *	WIMLIB_ERR_SUCCESS			(0)
 *	WIMLIB_ERR_READ				(errno set)
 *	WIMLIB_ERR_UNEXPECTED_END_OF_FILE	(errno set to EINVAL)
 *	WIMLIB_ERR_RESOURCE_ORDER		(errno set to ESPIPE)
 */
int
full_pread(struct filedes *fd, void *buf, size_t count, off_t offset)
{
	if (fd->is_pipe)
		goto is_pipe;

	while (count) {
		ssize_t ret = pread(fd->fd, buf, count, offset);
		if (unlikely(ret <= 0)) {
			if (ret == 0) {
				errno = EINVAL;
				return WIMLIB_ERR_UNEXPECTED_END_OF_FILE;
			}
			if (errno == EINTR)
				continue;
			if (errno == ESPIPE) {
				fd->is_pipe = 1;
				goto is_pipe;
			}
			return WIMLIB_ERR_READ;
		}
		buf += ret;
		count -= ret;
		offset += ret;
	}
	return 0;

is_pipe:
	return pipe_read(fd, buf, count, offset);
}
示例#6
0
// Create anonymous pipe, preventing inheritance of the read pipe and setting
// security of the write pipe to sa.
static bool _create_anonymous_pipe(unique_handle* pipe_read_out,
                                   unique_handle* pipe_write_out,
                                   SECURITY_ATTRIBUTES* sa) {
    HANDLE pipe_read_raw = NULL;
    HANDLE pipe_write_raw = NULL;
    if (!CreatePipe(&pipe_read_raw, &pipe_write_raw, sa, 0)) {
        fprintf(stderr, "Cannot create pipe: %s\n",
                android::base::SystemErrorCodeToString(GetLastError()).c_str());
        return false;
    }

    unique_handle pipe_read(pipe_read_raw);
    pipe_read_raw = NULL;
    unique_handle pipe_write(pipe_write_raw);
    pipe_write_raw = NULL;

    if (!_make_handle_noninheritable(pipe_read.get())) {
        return false;
    }

    *pipe_read_out = std::move(pipe_read);
    *pipe_write_out = std::move(pipe_write);

    return true;
}
static void event_handler(int flags, void *arg)
{
	struct mqueue *mq = arg;
	struct msg msg;
	ssize_t n;

	if (!(flags & FD_READ))
		return;

	n = pipe_read(mq->pfd[0], &msg, sizeof(msg));
	if (n < 0)
		return;

	if (n != sizeof(msg)) {
		(void)re_fprintf(stderr, "mqueue: short read of %d bytes\n",
				 n);
		return;
	}

	if (msg.magic != MAGIC) {
		(void)re_fprintf(stderr, "mqueue: bad magic on read (%08x)\n",
				 msg.magic);
		return;
	}

	mq->h(msg.id, msg.data, mq->arg);
}
示例#8
0
ssize_t
lisp_read(HANDLE hfile, void *buf, unsigned int count) {
  switch(GetFileType(hfile)) {
  case FILE_TYPE_CHAR:
    return console_read(hfile, buf, count);
    break;

  case FILE_TYPE_PIPE:          /* pipe or one of these newfangled socket things */
    {
      int socktype, optlen = sizeof(int);
      if ((getsockopt((SOCKET)hfile, SOL_SOCKET, SO_TYPE, (char *)&socktype, &optlen) != 0) && (GetLastError() == WSAENOTSOCK)) {
        return pipe_read(hfile, buf, count);
      }
    }
    /* It's a socket, fall through */
    
  case FILE_TYPE_DISK:
    return lisp_standard_read(hfile, buf, count);
    break;

  default:
    errno = EBADF;
    return -1;
  }
}
示例#9
0
文件: cano.c 项目: Harvie/Programs
int open(const char *filename, int flags, ...)
{
	static int (*open_orig)(const char *, int, mode_t);
	int ret;
	va_list ap;
	mode_t mode;

	if (!open_orig) {
		open_orig = dlsym(RTLD_NEXT, "open");
	}

	va_start(ap, flags);
	mode = va_arg(ap, mode_t);
	va_end(ap);

	if(strcmp(filename,"/tmp/a") != 0) {
		ret = open_orig(filename, flags, mode);
		//ret = syscall(SYS_open,redirect_name(filename),flags,mode);
	} else {
		//ret = fileno(popen("echo aaaa", "rb"));
		if((flags & O_WRONLY) || (flags & O_RDWR)) {
			ret = pipe_write();
		} else {
			ret = pipe_read();
		}
		//ssize_t write(int fd, const void *buf, size_t count);
	}

	//printf("open(\"%s\", 0x%x, %o) -> %d\n", filename, flags, mode, ret);

	return ret;
}
示例#10
0
文件: wav.c 项目: SylvestreG/bitrig
/*
 * read method of the file structure
 */
unsigned int
wav_read(struct file *file, unsigned char *data, unsigned int count)
{
	struct wav *f = (struct wav *)file;
	unsigned int n;

	if (f->map)
		count /= sizeof(adata_t);
	if (f->rbytes >= 0 && count > f->rbytes) {
		count = f->rbytes; /* file->rbytes fits in count */
		if (count == 0) {
#ifdef DEBUG
			if (debug_level >= 3) {
				wav_dbg(f);
				dbg_puts(": read complete\n");
			}
#endif
			if (!f->mmc)
				file_eof(&f->pipe.file);
			return 0;
		}
	}
	n = pipe_read(file, data, count);
	if (n == 0)
		return 0;
	if (f->rbytes >= 0)
		f->rbytes -= n;
	if (f->map) {
		wav_conv(data, n, f->map);
		n *= sizeof(adata_t);
	}
	return n;
}
示例#11
0
文件: main.c 项目: Oralux/libvoxin
int main(int argc, char **argv)
{
  int res;
  int i;
  struct voxind_t *v;
  struct sigaction act;

#ifdef DEBUG
  {
    struct stat buf;
    while (!stat(VOXIND_DBG, &buf)) {
      sleep(1);
    }
  }
#endif

  ENTER();
  BUILD_ASSERT(PIPE_MAX_BLOCK > MIN_MSG_SIZE);

  memset(&act, 0, sizeof(act));
  sigemptyset(&act.sa_mask);
  act.sa_flags = 0;
  act.sa_handler = sighandler;
  for (i = 1; i < NSIG; i++) {
    sigaction(i, &act, NULL);
  }

  my_voxind = calloc(1, sizeof(struct voxind_t));
  if (!my_voxind) {
    res = errno;
    goto exit0;
  }

  my_voxind->msg = calloc(1, PIPE_MAX_BLOCK);
  if (!my_voxind->msg) {
    res = errno;
    goto exit0;
  }
  my_voxind->msg_length = PIPE_MAX_BLOCK;

  res = pipe_restore(&my_voxind->pipe_command, PIPE_COMMAND_FILENO);
  if (res)
    goto exit0;

  atexit(my_exit);

  do {
    size_t msg_length = my_voxind->msg_length;
    if(pipe_read(my_voxind->pipe_command, my_voxind->msg, &msg_length))
      goto exit0;
    if (unserialize(my_voxind->msg, &msg_length))
      goto exit0;
    pipe_write(my_voxind->pipe_command, my_voxind->msg, &msg_length);
  } while (1);

 exit0:
  err("LEAVE, (err=%d)",res);
  return res;
}
示例#12
0
文件: commands.cpp 项目: pouba/os
void c_pipe(run_params* par) {
	int c = 0;
	while (1) {
		c = pipe_read(par->in);
		if (c == -1) break;
		pipe_write(par->out, c);
	}
}
示例#13
0
文件: c_cmd.cpp 项目: pouba/os
void c_cmd_run(run_params* params) {

	int c, ac_in, ac_out, ac_err;
	int i = 0;
	int out_path = 1;
	char* line = (char*)malloc(sizeof(char) * MAX_LINE_LEN);

	pipe_out* in = params->in;
	pipe_in* out = params->out;
	pipe_in* err = params->err;

	if (out_path && pipe_out_is_keyboard(in)) write_path(params);

	ac_in = params->in->autoclose;
	ac_out = params->out->autoclose;
	ac_err = params->err->autoclose;

	params->in->autoclose = 0;
	params->out->autoclose = 0;
	params->err->autoclose = 0;

	int pos = 0;
	while (true) {
		c = pipe_read(in);

		if (pos >= MAX_CMD_LEN) {
			pipe_write_s(err, "Maximal length of a line reached.\n");
			break;
		}

		if ((c == CMD_END_CHAR_LINE) || (c == -1)) {
			line[pos] = '\0';
			int ret = parse_line(line, params);
			if (ret == 1) break;
			pos = 0;
			if (c == -1) {
				if (params->secret_params == 1) {
					ac_in = 1;
					ac_out = 1;
					ac_err = 1;
				}
				break;
			}

			if (out_path && pipe_out_is_keyboard(in)) write_path(params);
		}
		else {
			line[pos] = c;
			pos++;
		}
	}

	free(line);

	params->in->autoclose = ac_in;
	params->out->autoclose = ac_out;
	params->err->autoclose = ac_err;
}
示例#14
0
void *mill_piperecv(struct mill_pipe_s *mp, int *done) {
    void *ptr = mill_valbuf(mill->running, mp->sz);
    mill_assert(done);
    int rc = pipe_read(mp, ptr);
    if (mill_slow(rc == -1))
        mill_panic(strerror(errno));    /* Hmm! */
    *done = (rc == 0);
    return ptr;
}
示例#15
0
/*
 * The 'connect_xxx()' functions are needed for named pipes when
 * the open() code hasn't guaranteed a connection (O_NONBLOCK),
 * and we need to act differently until we do get a writer..
 */
static ssize_t connect_read(struct file * filp, char * buf,
			    size_t count, loff_t *ppos)
{
	struct inode * inode = filp->f_dentry->d_inode;
	if (PIPE_EMPTY(*inode) && !PIPE_WRITERS(*inode))
		return 0;
	filp->f_op = &read_fifo_fops;
	return pipe_read(filp,buf,count,ppos);
}
示例#16
0
文件: sys.c 项目: jack2684/yalnix
int Y_PipeRead(int pipe_id, void *buf, int len, UserContext *user_context) {
    log_info("PID(%d) going to read from pipe %d", running_proc->pid, pipe_id);

    pipe_t *pipe = (pipe_t*)util_get(pipe_id);
    log_info("Got pipe pointer %p", pipe);
    if(pipe == NULL) {
        log_err("Cannot get pipe %d from hashmap", pipe->id);
    }

    return pipe_read(pipe, buf, len, user_context);
}
示例#17
0
/**
 * handle_client:  Main application layer thread for each client
 * @author ndemarinis (Basic implementation)
 */
void *handle_client(void *data)
{
  struct client_handler_data *clnt = (struct client_handler_data *)data;
  int pipes[2]; // Make a pipe to connect to the layer stack

  int to_read, bytes_written;
  char read_buffer[PIPE_BUFFER_SIZE];
  struct packet* pkt_in;

  pid_t clnt_pid; // PID we receive from the cilent before startup
  struct layer_stack *stack; // Work data for layer stack implementation

  memset(read_buffer, 0, PIPE_BUFFER_SIZE);

  // Receive the client's PID for use as an identifier.  
  if((recv(clnt->sock, &clnt_pid, sizeof(pid_t), 0) != sizeof(pid_t)))
    die_with_error("Error receiving PID from client!");
  
  stack = create_layer_stack(clnt->sock, clnt_pid, pipes); // Initialize all of our layer threads

  sleep(1); // Wait for the layer stack creation to settle

  for(;;)
    {
      // Just try and echo a message for now.
      printf("%d:  APP:  Starting a test read.\n\n", clnt_pid);

      // Grab a string
      if((to_read = read(pipe_read(pipes), read_buffer, PIPE_BUFFER_SIZE)) <= 0)
	{
	  printf("%d:  APP:  Read 0 bytes from socket.  Terminating!\n", clnt_pid);
	  break;
	}

      pkt_in = (struct packet *)read_buffer;

      printf("%d:  APP:  Read packet of %d bytes with payload of %d bytes\n", 
	     clnt_pid, to_read, pkt_in->length);

      // Send it straight back
      printf("%d:  APP:  Sending packet of %d bytes back to client\n", clnt_pid, to_read);
      if((bytes_written = write(pipe_write(pipes), read_buffer, to_read)) <= 0)
	{
	  printf("%d:  APP:  Wrote %d bytes, socket must have closed.  Terminating!\n", 
		 clnt_pid, bytes_written);
	  break;
	}
    }
  
  printf("%d:  Client successfully terminated!\n", clnt_pid);
  pthread_exit(NULL);
}
示例#18
0
static void iokit_forward_notifications(void *opaque) {
	uint8_t byte;

	(void)opaque;

	if (pipe_read(&_notification_pipe, &byte, sizeof(byte)) < 0) {
		log_error("Could not read from notification pipe: %s (%d)",
		          get_errno_name(errno), errno);

		return;
	}

	usb_reopen();
}
示例#19
0
static ssize_t IMFS_fifo_read(
    rtems_libio_t *iop,
    void          *buffer,
    size_t         count
)
{
    IMFS_jnode_t *jnode = iop->pathinfo.node_access;

    int err = pipe_read(JNODE2PIPE(jnode), buffer, count, iop);
    if (err > 0)
        IMFS_update_atime(jnode);

    IMFS_FIFO_RETURN(err);
}
示例#20
0
ssize_t IMFS_fifo_read(
  epos_libio_t *iop,
  void          *buffer,
  size_t         count
)
{
  IMFS_jnode_t *jnode = iop->file_info;

  int err = pipe_read(JNODE2PIPE(jnode), buffer, count, iop);
  if (err > 0)
    IMFS_update_atime(jnode);

  IMFS_FIFO_RETURN(err);
}
示例#21
0
文件: commands.cpp 项目: pouba/os
void scan(run_params* par) {
	while (true) {
		int c = pipe_read(par->in);
		if (c == -1) break;

		char str[10];
		int i;
		for (i = 0; i < 10; i++) {
			str[i] = '\0';
		}
		sprintf_s(str, "%d\n", c);

		pipe_write_s(par->out, str);
	}
}
示例#22
0
文件: commands.cpp 项目: pouba/os
void wc(run_params* par) {
	if (par->argc >= 1) {
		char* filename = par->args[0];
		node* n = node_get(filename, par->root_node, par->start_node);

		if (n == NULL) {
			pipe_write_s(par->err, "File does not exist.\n");
			return;
		}
		if (n->directory) {
			pipe_write_s(par->err, "File is a directory.\n");
			return;
		}

		if (!node_try_lock(n)) {
			pipe_write_s(par->err, "Can't open the file.\n");
			return;
		}

		wc_count(par, n->content, n->name);
		node_unlock(n);

	}
	else {
		int pos, c = -1, buf_size = 300;
		char* buf = (char*)malloc(sizeof(char) * buf_size);

		pos = 0;
		while (true) {
			c = pipe_read(par->in);
			if ((c == -1)) break;
			
			if (pos == buf_size - 1) {
				buf_size *= 2;
				buf = (char*)realloc(buf, sizeof(char*) * buf_size);
			}
			buf[pos] = c;
			pos++;
		}
		buf[pos] = '\0';

		wc_count(par, buf, "");
		free(buf);
		buf = NULL;
	}
}
示例#23
0
文件: io.c 项目: mrb852/osm-exam
/**
 * Reads at most length bytes from the file identified by filehandle into the
 * specified buffer, starting at the current position, and advancing the file
 * position.
 *
 * @return The number of bytes actually read. It is invalid to read from
 * FILEHANDLE_STDOUT or FILEHANDLE_STDERR. In this case, VFS_INVALID_PARAMS is
 * returned.
 */
int io_read(openfile_t file, void* buffer, int length)
{
  int res;

  // Don't pipe if writing to std
  if (file > 2) {
    // Get the pipe for the file
    pipe_t *pipe = pipe_get_pipe(file);

    // Don't read to empty pipes
    if (pipe == NULL) {
      KERNEL_PANIC("Cannot read from empty pipe\n");
    }

    // Get the read end and update the file
    file = pipe->read_end;

    // Pipe read to the buffer
    pipe_read(buffer, length, pipe);
  }


  switch(file) {
  case FILEHANDLE_STDIN:
    res = tty_read(buffer, length);
    break;

  case FILEHANDLE_STDOUT:
  case FILEHANDLE_STDERR:
    res = VFS_INVALID_PARAMS;
    break;

  default:
    file -= 3;
    if (!process_has_open_file(file)) {
      res = VFS_NOT_OPEN_IN_PROCESS;
    } else {
      res = vfs_read(file, buffer, length);
    }
  }

  return res;
}
示例#24
0
文件: commands.cpp 项目: pouba/os
void sort(run_params* par) {
	int i,pos, c = -1, arr_pos = 0, arr_size = 200;
	char* buf = (char*)malloc(sizeof(char) * SORT_SIZE);
	char** arr = (char**)malloc(sizeof(char *) * arr_size);

	while (true) {
		pos = 0;
		while (true) {
			c = pipe_read(par->in);
			if ((c == 10) || (c == -1)) break;
			buf[pos] = c;
			if (pos == SORT_SIZE) pos = 0; // do not accept lines longer than 500
			pos++;
		}
		buf[pos] = '\0';
		arr[arr_pos++] = buf;
		buf = (char*)malloc(sizeof(char) * SORT_SIZE);
		if (buf == NULL) goto end;

		if (arr_pos == arr_size) {
			arr_size += 200;
			arr = (char**)realloc(arr, sizeof(char*) * arr_size);
		}

		if (c == -1) break;
	}

	qsort(arr, arr_pos, sizeof(char*), cmp_func);

	for (i = 0; i < arr_pos; i++) {
		printf("%s\n", arr[i]);
	}

end: 
	for (i = 0; i < arr_pos; i++) {
		free(arr[i]);
	}
	free(arr);
	return;
}
示例#25
0
void serial_port_ertsr (struct serial_port* port)
{
	int			r;

	DBG_LOG(fprintf(debug_log_file, "event: ertsr\n"));

	/* Try to read data from erts.  This event was called because
	 * we believe there may be data available now which needs to
	 * be copied into the outgoing buffer.
	 */
	r = pipe_read(
		port->erts,
		port->outgoing + port->outgoingLen,
		port->outgoingBufSz - port->outgoingLen);
	DBG_LOG(fprintf(debug_log_file, "ertsr: pipe_read = %i\n", r));

	/* If new data was received during this call, update the buffer
	 * state.  If the serial port is writable, the packets will be
	 * processed, but not until that event is fired.  Its bad form
	 * to try and write to the serial port if its not ready (at least
	 * on the Windows implementations).
	 */
	if (r > 0)
	{
		port->outgoingLen += r;
		return;
	}

	port->isDead = 1; /* EOF or read error */
	if (pipe_last_error(port->erts))
	{
		int	ecode;
		char	msg[256];

		ecode = pipe_last_error(port->erts);
		pipe_format_error(port->erts, ecode, msg, sizeof(msg));
		DBG_LOG(fprintf(debug_log_file, "pipe_read error: %i %s\n",
			ecode, msg));
	}
}
示例#26
0
文件: commands.cpp 项目: pouba/os
void freq(run_params* par) {
	int arr[FREQ_SIZE], i;
	char buf[50];

	for (i = 0; i < FREQ_SIZE; i++) arr[i] = 0;

	while (true) {
		int c = pipe_read(par->in);
		if (c == -1) break;

		if ((c < 0) || (c >= FREQ_SIZE)) continue;

		arr[c]++;
	}

	for (i = 0; i < FREQ_SIZE; i++) {
		if (arr[i] > 0) {
			sprintf_s(buf, "0x%hhx : %d\n", i, arr[i]);
			pipe_write_s(par->out, buf);
		}
	}
}
示例#27
0
void* worker_thread(void* myid){

  stats_message work_stats;
  request recived_request;
  pthread_mutex_lock(&mutex);

    recived_request=pipe_read(0);

    /* Search file with html page and send to client*/
    send_page(recived_request.socket_id);

    work_stats.mtype=1;
    strcpy(work_stats.request_type,recived_request.request_type);
    strcpy(work_stats.file,recived_request.request_file);
    work_stats.thread_number=(int)myid;
    work_stats.entry_time[0]=1;
    work_stats.entry_time[1]=2;
    work_stats.end_time[0]=3;
    work_stats.end_time[1]=4;

    if(msgsnd(queue, &work_stats, sizeof(stats_message)-sizeof(long), 0)==-1){/*está a dar erro aqui*/
      perror("Message Queue Sending");
    }

    printf("[Worker]Data to write on file\n");
    printf("--------------------------------\n");
    printf("\tMyType:%lu\n",work_stats.mtype);
    printf("\tRequest Type:%s\n",work_stats.request_type);
    printf("\tFile:%s\n",work_stats.file);
    printf("\tThread Number:%d\n",work_stats.thread_number);
    printf("\tEntry Time:%d:%d\n",work_stats.entry_time[0],work_stats.entry_time[1]);
    printf("\tEnd Time:%d:%d\n",work_stats.end_time[0],work_stats.end_time[1]);
    printf("-------------------------------\n");

  pthread_mutex_unlock(&mutex);

  /*depois de efectuar os pedidos vai para meter na message queue*/
}
示例#28
0
static void process_handle_state_change(void *opaque) {
	Process *process = opaque;
	ProcessStateChange change;

	if (pipe_read(&process->state_change_pipe, &change, sizeof(change)) < 0) {
		log_error("Could not read from state change pipe for child process (executable: %s, pid: %u): %s (%d)",
		          process->executable->buffer, process->pid, get_errno_name(errno), errno);

		return;
	}

	process->state = change.state;
	process->timestamp = change.timestamp;
	process->exit_code = change.exit_code;

	if (!process_is_alive(process)) {
		process->pid = 0;
	}

	if (process->state_changed != NULL) {
		process->state_changed(process->opaque);
	}

	// only send a process-state-changed callback if there is at least one
	// external reference to the process object. otherwise there is no one that
	// could be interested in this callback anyway. also this logic avoids
	// sending process-state-changed callbacks for scheduled program executions
	if (process->base.external_reference_count > 0) {
		api_send_process_state_changed_callback(process->base.id, change.state,
		                                        change.timestamp, change.exit_code);
	}

	if (process->release_on_death && !process_is_alive(process)) {
		process->release_on_death = false; // only release-on-death once

		object_remove_internal_reference(&process->base);
	}
}
示例#29
0
文件: pipes2.c 项目: ivan371/3sem
void parent_rdwr (struct pipes *pipes, fd_set *rfds, fd_set *wfds, int nFds, int nForks)
{
    	int i = 0;
    	int nChecked_fds = 0;
    	i = 0;
    	while (nChecked_fds < nFds) {
       		if (FD_ISSET (pipes[i].rfd, rfds)) {
            		if (!pipe_read  (&pipes[i])) {
            	    		if(close (pipes[i].rfd) == -1) ERROR("CLOSE ERROR5");
    	        	}
    	        	nChecked_fds++;
    	   	}
    	   	if (FD_ISSET (pipes[i].wfd, wfds)) {
    	        	pipe_write (&pipes[i]);
    	        	if (pipes[i].can_write == 2 && pipes[i].wfd != STDOUT_FILENO)
			{
			 	if (close (pipes[i].wfd) == -1) ERROR("CLOSE ERROR6");
			}
    	       		nChecked_fds++;
    	    	}
    	    	i++;
    	}
}
示例#30
0
文件: pipe.c 项目: pc-coholic/Quarto
/* return Wert:
   -1,0 : Fehler
   1 : Pipe ist ready
   2 : Socket lesbar
*/
int ueberwacheFd(int pipe_fd[],char *getText){
	//Observe the pi(p)e with the magic of Gandalf the Grey
	int socket_fd = getSocketFd();
	fd_set set;
	FD_ZERO(&set);
	FD_SET(pipe_fd[READ],&set);
	FD_SET(socket_fd,&set);
	int max = pipe_fd[READ];
	if (max < socket_fd) {
		max = socket_fd;
	}
	int ret = select(max+1,&set,NULL,NULL,NULL);
	
	if(ret < 1){
		log_printf(LOG_ERROR,"Fehler bei Select\n");
		perror("error");
		return 0;
	}
	else if (FD_ISSET(pipe_fd[READ],&set)) {
			log_printf(LOG_DEBUG,"Gandalf hat gedacht.\n");
			return pipe_read(pipe_fd, getText);		}
	log_printf(LOG_DEBUG,"Gandalf denkt zu langsam.\n");
	return 2;
}