Python termios.FIONREAD Examples

The following are 10 code examples of termios.FIONREAD(). You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may also want to check out all available functions/classes of the module termios , or try the search function .
Example #1
Source File: pyinotify.py    From hacker-scripts with MIT License 6 votes vote down vote up 
def read_events(self):
        """
        Read events from device, build _RawEvents, and enqueue them.
        """
        buf_ = array.array('i', [0])
        # get event queue size
        if fcntl.ioctl(self._fd, termios.FIONREAD, buf_, 1) == -1:
            return
        queue_size = buf_[0]
        if queue_size < self._threshold:
            log.debug('(fd: %d) %d bytes available to read but threshold is '
                      'fixed to %d bytes', self._fd, queue_size,
                      self._threshold)
            return

        try:
            # Read content from file
            r = os.read(self._fd, queue_size)
        except Exception, msg:
            raise NotifierError(msg)
Example #2
Source File: poll.py    From rb with Apache License 2.0 5 votes vote down vote up 
def _is_closed_select(f):
    rlist, wlist, _ = select.select([f], [f], [], 0.0)
    if not rlist and not wlist:
        return False
    buf = array.array('i', [0])
    fcntl.ioctl(f.fileno(), termios.FIONREAD, buf)
    return buf[0] == 0
Example #3
Source File: serialposix.py    From ddt4all with GNU General Public License v3.0 5 votes vote down vote up 
def in_waiting(self):
        """Return the number of bytes currently in the input buffer."""
        #~ s = fcntl.ioctl(self.fd, termios.FIONREAD, TIOCM_zero_str)
        s = fcntl.ioctl(self.fd, TIOCINQ, TIOCM_zero_str)
        return struct.unpack('I', s)[0]

    # select based implementation, proved to work on many systems
Example #4
Source File: serialposix.py    From ddt4all with GNU General Public License v3.0 5 votes vote down vote up 
def out_waiting(self):
        """Return the number of bytes currently in the output buffer."""
        #~ s = fcntl.ioctl(self.fd, termios.FIONREAD, TIOCM_zero_str)
        s = fcntl.ioctl(self.fd, TIOCOUTQ, TIOCM_zero_str)
        return struct.unpack('I', s)[0]
Example #5
Source File: job_server.py    From catkin_tools with Apache License 2.0 5 votes vote down vote up 
def _running_jobs(cls):

        try:
            buf = array.array('i', [0])
            if fcntl.ioctl(cls._job_pipe[0], FIONREAD, buf) == 0:
                return cls._max_jobs - buf[0]
        except (NotImplementedError, OSError):
            pass

        return cls._max_jobs
Example #6
Source File: serialposix.py    From android3dblendermouse with Apache License 2.0 5 votes vote down vote up 
def in_waiting(self):
        """Return the number of bytes currently in the input buffer."""
        #~ s = fcntl.ioctl(self.fd, termios.FIONREAD, TIOCM_zero_str)
        s = fcntl.ioctl(self.fd, TIOCINQ, TIOCM_zero_str)
        return struct.unpack('I', s)[0]

    # select based implementation, proved to work on many systems
Example #7
Source File: serialposix.py    From android3dblendermouse with Apache License 2.0 5 votes vote down vote up 
def out_waiting(self):
        """Return the number of bytes currently in the output buffer."""
        #~ s = fcntl.ioctl(self.fd, termios.FIONREAD, TIOCM_zero_str)
        s = fcntl.ioctl(self.fd, TIOCOUTQ, TIOCM_zero_str)
        return struct.unpack('I', s)[0]
Example #8
Source File: serialposix.py    From android_universal with MIT License 5 votes vote down vote up 
def in_waiting(self):
        """Return the number of bytes currently in the input buffer."""
        #~ s = fcntl.ioctl(self.fd, termios.FIONREAD, TIOCM_zero_str)
        s = fcntl.ioctl(self.fd, TIOCINQ, TIOCM_zero_str)
        return struct.unpack('I', s)[0]

    # select based implementation, proved to work on many systems
Example #9
Source File: serialposix.py    From android_universal with MIT License 5 votes vote down vote up 
def out_waiting(self):
        """Return the number of bytes currently in the output buffer."""
        #~ s = fcntl.ioctl(self.fd, termios.FIONREAD, TIOCM_zero_str)
        s = fcntl.ioctl(self.fd, TIOCOUTQ, TIOCM_zero_str)
        return struct.unpack('I', s)[0]
Example #10
Source File: pyinotify.py    From recursive-gobuster with MIT License 4 votes vote down vote up 
def read_events(self):
        """
        Read events from device, build _RawEvents, and enqueue them.
        """
        buf_ = array.array('i', [0])
        # get event queue size
        if fcntl.ioctl(self._fd, termios.FIONREAD, buf_, 1) == -1:
            return
        queue_size = buf_[0]
        if queue_size < self._threshold:
            log.debug('(fd: %d) %d bytes available to read but threshold is '
                      'fixed to %d bytes', self._fd, queue_size,
                      self._threshold)
            return

        try:
            # Read content from file
            r = os.read(self._fd, queue_size)
        except Exception as msg:
            raise NotifierError(msg)
        log.debug('Event queue size: %d', queue_size)
        rsum = 0  # counter
        while rsum < queue_size:
            s_size = 16
            # Retrieve wd, mask, cookie and fname_len
            wd, mask, cookie, fname_len = struct.unpack('iIII',
                                                        r[rsum:rsum+s_size])
            # Retrieve name
            bname, = struct.unpack('%ds' % fname_len,
                                   r[rsum + s_size:rsum + s_size + fname_len])
            # FIXME: should we explictly call sys.getdefaultencoding() here ??
            uname = bname.decode()
            rawevent = _RawEvent(wd, mask, cookie, uname)
            if self._coalesce:
                # Only enqueue new (unique) events.
                raweventstr = str(rawevent)
                if raweventstr not in self._eventset:
                    self._eventset.add(raweventstr)
                    self._eventq.append(rawevent)
            else:
                self._eventq.append(rawevent)
            rsum += s_size + fname_len