Python stdin.fileno函数代码示例

def myinput(timeout=0):
  ESCSEQ = b'\x1b['
  tty.setraw(stdin.fileno())
  #stdout = os.fdopen(stdin.fileno(), 'wb', 0)
  special = False
  while True:
    rlist, wlist, xlist = select([stdin], [], [], 0)
    ch = os.read(stdin.fileno(), 1)
    ch = ch.decode()
    if ch == '\x1b':
      if special:
        yield ESC
      else:
        special = True
    elif ch == '[':
      if not special:
        yield ch
    else:
      if special:
        special = False
        if   ch == 'A': yield UP
        elif ch == 'B': yield DOWN
        elif ch == 'C': yield RIGHT
        elif ch == 'D': yield LEFT
      else:
        yield ch

def run_client():
    ctx = zmq.Context()
    sub = ctx.socket(zmq.SUB)
    sub.connect('tcp://localhost:4455')
    sub.setsockopt(zmq.SUBSCRIBE, "")

    push = ctx.socket(zmq.PUSH)
    push.connect('tcp://localhost:4456')

    plr = zmq.Poller()
    plr.register(stdin.fileno(), zmq.POLLIN)
    plr.register(sub, zmq.POLLIN)

    while True:
        try:
            fds = dict(plr.poll())
        except KeyboardInterrupt:
            print "\nClosing gracefully..."
            return

        if stdin.fileno() in fds:
            line = stdin.readline()[:-1] # trim newline char
            push.send(line)

        if sub in fds:
            msg = sub.recv()
            print "Got message: %r" % (msg,)

def getchar():
    fd = stdin.fileno()
    old_settings = termios.tcgetattr(fd)
    try:
        tty.setraw(stdin.fileno())
        ch = stdin.read(1)
    finally:
        termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
    return ch

def cbreak():
  if hasattr(stdin, "fileno") and os.isatty(stdin.fileno()):
    old_attrs = termios.tcgetattr(stdin)
    tty.setcbreak(stdin)
    tty.setraw(stdin)
  try:
    yield
  finally:
    if hasattr(stdin, "fileno") and os.isatty(stdin.fileno()):
      termios.tcsetattr(stdin, termios.TCSADRAIN, old_attrs)

def init():
    flags = fcntl.fcntl(stdin.fileno(), fcntl.F_GETFL)
    if flags == flags | os.O_NONBLOCK:
        return
    else:
        rv = fcntl.fcntl(stdin.fileno(), fcntl.F_SETFL, flags | os.O_NONBLOCK)
        if rv == 0:
            print "ok"
        else:
            print "broken"

def stdin_handler():
    fcntl.fcntl(stdin, fcntl.F_SETFL, os.O_NONBLOCK)
    while True:
        wait_read(stdin.fileno())
        cmd = stdin.readline().strip().lower()
        if cmd == 'quit':
            exit(0)

def connect(host, handshake):
    s = socket()
    s.connect((host, PORT))
    s.send(handshake)
    print('Connected, press ^C or ^D to terminate the connection.')
    try:
        fd = stdin.fileno()
        old_settings = tcgetattr(fd)
        setraw(fd)
        while True:
            r, _, _ = select([stdin, s], [], [])
            for ready in r:
                if ready is s:
                    r = s.recv(4096)
                    if not r:
                        print('Connection closed by remote peer', file=stderr)
                        return
                    stdout.write(r)
                    stdout.flush()
                elif ready is stdin:
                    r = stdin.read(1)
                    if not r or chr(3) in r or chr(4) in r:
                        s.shutdown(SHUT_RDWR)
                        return
                    s.send(r)
    finally:
        tcsetattr(fd, TCSADRAIN, old_settings)

def main():
	global parser
	global verbose
	global pretty

	parser.add_argument("-v", "--verbose", dest="verbose", action='store_true',
						help="verbose output")
	parser.add_argument("-p", "--pretty", dest="pretty", action='store_true',
						help="pretty output. requires PTable module")
	parser.add_argument("-S", "--section", dest="section", default=None,
					help="""\
define a section in the following format;
	NAME SIZE SYM1 SYM2 SYM3
use SIZE as zero to skip size usage calculation
\
					""", action='append')

	options = parser.parse_args()

	is_pipe = not isatty(stdin.fileno())

	if not is_pipe or not options.section:
		usage()
		quit(1)

	if options.verbose:
		verbose = True

	if options.pretty:
		pretty = True

	sections = parse_arg_sections(options.section)
	sizes = parse(sections)

	output(sizes)

 def _daemonize(self):
     try:
         pid = os.fork()
         if pid > 0:
             exit()
     except OSError as e:
         error(_('Error entering daemon mode: %s') % e.strerror)
         exit()
     os.chdir('/')
     os.setsid()
     os.umask(0)
     stdout.flush()
     stderr.flush()
     si = open(os.devnull, 'r')
     so = open(os.devnull, 'a+')
     se = open(os.devnull, 'a+')
     os.dup2(si.fileno(), stdin.fileno())
     os.dup2(so.fileno(), stdout.fileno())
     os.dup2(se.fileno(), stderr.fileno())
     on_exit(self._quit)
     old_log = getLogger()
     if old_log.handlers:
         for handler in old_log.handlers:
             old_log.removeHandler(handler)
     log(filename=self.logfile, level=self.loglevel,
         format='%(asctime)s %(levelname)-8s %(message)s')
     self._set_pid()

 def pos(stream=stdout):
     '''Get cursor position.'''
     
     # Save term settings
     fd = stdin.fileno()
     prev = termios.tcgetattr(fd)
     
     stream.write("\033[6n")
     
     resp = ""
     ch = ''
     
     # Immitate getch() until 'R' (end of tty response, e.g. \033[1;1R)
     try:
         tty.setraw(fd)
         while ch!='R':
             ch = stdin.read(1)
             resp += ch
     
     finally:
         # Reset term mode
         termios.tcsetattr(fd, termios.TCSADRAIN, prev)
     
     try:
         # First two chars in response are \033 and [, last is R
         return [int(c) for c in resp[2:-1].split(';')]
     except:
         # In case of failure
         return [-1, -1]

def get_terminal_size_posix():
    def ioctl_GWINSZ(fd):
        try:
            import fcntl
            import termios
            cr = struct.unpack('hh',
                               fcntl.ioctl(fd, termios.TIOCGWINSZ, '1234'))
            return cr
        except:
            pass
    cr = ioctl_GWINSZ(stdin.fileno()) or \
         ioctl_GWINSZ(stdout.fileno()) or \
         ioctl_GWINSZ(stderr.fileno())
    if not cr:
        try:
            with os.open(os.ctermid(), os.O_RDONLY) as fd:
            	cr = ioctl_GWINSZ(fd)
        except:
            pass
    if not cr:
        try:
            cr = (os.environ['LINES'], os.environ['COLUMNS'])
        except:
            pass
    if not cr:
        raise TerminalError('cannot determine terminal size from POSIX')
    return int(cr[1]), int(cr[0])

   def daemonize(self):
      """
      Forks the process(es) from the controlling terminal
      and redirects I/O streams for logging.
      """

      self.fork()

      chdir(getcwd())
      setsid()
      umask(0)
  
      self.fork()
      stdout.flush()
      stderr.flush()

      si= file(self.stdin, 'w+')
      so= file(self.stdout, 'a+')
      se= file(self.stderr, 'a+', 0)

      dup2(si.fileno(), stdin.fileno())
      dup2(so.fileno(), stdout.fileno())
      dup2(se.fileno(), stderr.fileno())

      register(self.del_pid)
      self.set_pid()

def enableEchoMode():
    fd = stdin.fileno()
    state = tcgetattr(fd)
    if state[TERMIO_LFLAGS] & ECHO:
        return False
    state[TERMIO_LFLAGS] = state[TERMIO_LFLAGS] | ECHO
    tcsetattr(fd, TCSADRAIN, state)
    return True

def clear(): # LIMPANDO A TELA
	import curses
	import termios
	from sys import stdin
	fd = stdin.fileno()
	scr = termios.tcgetattr(fd)
	scrn = curses.initscr()
	scrn.clear()
	termios.tcsetattr(fd, termios.TCSADRAIN, scr)

    def daemonize(self):
        try:
            pid = fork()
            if pid > 0:
                # exit first parent
                _exit(0)
        except OSError as e:
            stderr.write(
                "fork #1 failed: {0:d} ({1:s})\n".format(
                    e.errno, str(e)
                )
            )

            raise SystemExit(1)

        # decouple from parent environment
        chdir(self.path)
        setsid()
        umask(0)

        # do second fork
        try:
            pid = fork()
            if pid > 0:
                # exit from second parent
                _exit(0)
        except OSError as e:
            stderr.write(
                "fork #2 failed: {0:d} ({1:s})\n".format(
                    e.errno, str(e)
                )
            )

            raise SystemExit(1)

        # redirect standard file descriptors
        stdout.flush()
        stderr.flush()

        maxfd = getrlimit(RLIMIT_NOFILE)[1]
        if maxfd == RLIM_INFINITY:
            maxfd = 2048

        closerange(0, maxfd)

        si = open(self.stdin, "r")
        so = open(self.stdout, "a+")
        se = open(self.stderr, "a+")

        dup2(si.fileno(), stdin.fileno())
        dup2(so.fileno(), stdout.fileno())
        dup2(se.fileno(), stderr.fileno())

        self.fire(writepid())
        self.fire(daemonized(self))