def flags(self, *which):
import fcntl, os
if which:
if len(which) > 1:
raise TypeError, 'Too many arguments'
which = which[0]
else: which = '?'
l_flags = 0
if 'n' in which: l_flags = l_flags | os.O_NDELAY
if 'a' in which: l_flags = l_flags | os.O_APPEND
if 's' in which: l_flags = l_flags | os.O_SYNC
file = self._file_
if '=' not in which:
cur_fl = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if '!' in which: l_flags = cur_fl & ~ l_flags
else: l_flags = cur_fl | l_flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFL, l_flags)
if 'c' in which:
arg = ('!' not in which) # 0 is don't, 1 is do close on exec
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFD, arg)
if '?' in which:
which = '' # Return current flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if os.O_APPEND & l_flags: which = which + 'a'
if fcntl.fcntl(file.fileno(), fcntl.F_GETFD, 0) & 1:
which = which + 'c'
if os.O_NDELAY & l_flags: which = which + 'n'
if os.O_SYNC & l_flags: which = which + 's'
return which
python类O_NDELAY的实例源码
def flags(self, *which):
import fcntl, os
if which:
if len(which) > 1:
raise TypeError, 'Too many arguments'
which = which[0]
else: which = '?'
l_flags = 0
if 'n' in which: l_flags = l_flags | os.O_NDELAY
if 'a' in which: l_flags = l_flags | os.O_APPEND
if 's' in which: l_flags = l_flags | os.O_SYNC
file = self._file_
if '=' not in which:
cur_fl = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if '!' in which: l_flags = cur_fl & ~ l_flags
else: l_flags = cur_fl | l_flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFL, l_flags)
if 'c' in which:
arg = ('!' not in which) # 0 is don't, 1 is do close on exec
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFD, arg)
if '?' in which:
which = '' # Return current flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if os.O_APPEND & l_flags: which = which + 'a'
if fcntl.fcntl(file.fileno(), fcntl.F_GETFD, 0) & 1:
which = which + 'c'
if os.O_NDELAY & l_flags: which = which + 'n'
if os.O_SYNC & l_flags: which = which + 's'
return which
def __init__(self, device="/dev/ttyAMA0", baudrate=9600):
if not device.startswith("/dev/"):
device = "/dev/%s" % device
if isinstance(baudrate, str):
baudrate = int(baudrate)
aname = "B%d" % baudrate
if not hasattr(termios, aname):
raise Exception("Unsupported baudrate")
self.baudrate = baudrate
Bus.__init__(self, "UART", device, os.O_RDWR | os.O_NOCTTY)
fcntl.fcntl(self.fd, fcntl.F_SETFL, os.O_NDELAY)
#backup = termios.tcgetattr(self.fd)
options = termios.tcgetattr(self.fd)
# iflag
options[0] = 0
# oflag
options[1] = 0
# cflag
options[2] |= (termios.CLOCAL | termios.CREAD)
options[2] &= ~termios.PARENB
options[2] &= ~termios.CSTOPB
options[2] &= ~termios.CSIZE
options[2] |= termios.CS8
# lflag
options[3] = 0
speed = getattr(termios, aname)
# input speed
options[4] = speed
# output speed
options[5] = speed
termios.tcsetattr(self.fd, termios.TCSADRAIN, options)
def _setup_non_block_io(self, io):
outfd = io.fileno()
file_flags = fcntl.fcntl(outfd, fcntl.F_GETFL)
fcntl.fcntl(outfd, fcntl.F_SETFL, file_flags | os.O_NDELAY)
def flags(self, *which):
import fcntl, os
if which:
if len(which) > 1:
raise TypeError, 'Too many arguments'
which = which[0]
else: which = '?'
l_flags = 0
if 'n' in which: l_flags = l_flags | os.O_NDELAY
if 'a' in which: l_flags = l_flags | os.O_APPEND
if 's' in which: l_flags = l_flags | os.O_SYNC
file = self._file_
if '=' not in which:
cur_fl = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if '!' in which: l_flags = cur_fl & ~ l_flags
else: l_flags = cur_fl | l_flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFL, l_flags)
if 'c' in which:
arg = ('!' not in which) # 0 is don't, 1 is do close on exec
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFD, arg)
if '?' in which:
which = '' # Return current flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if os.O_APPEND & l_flags: which = which + 'a'
if fcntl.fcntl(file.fileno(), fcntl.F_GETFD, 0) & 1:
which = which + 'c'
if os.O_NDELAY & l_flags: which = which + 'n'
if os.O_SYNC & l_flags: which = which + 's'
return which
def flags(self, *which):
import fcntl, os
if which:
if len(which) > 1:
raise TypeError, 'Too many arguments'
which = which[0]
else: which = '?'
l_flags = 0
if 'n' in which: l_flags = l_flags | os.O_NDELAY
if 'a' in which: l_flags = l_flags | os.O_APPEND
if 's' in which: l_flags = l_flags | os.O_SYNC
file = self._file_
if '=' not in which:
cur_fl = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if '!' in which: l_flags = cur_fl & ~ l_flags
else: l_flags = cur_fl | l_flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFL, l_flags)
if 'c' in which:
arg = ('!' not in which) # 0 is don't, 1 is do close on exec
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFD, arg)
if '?' in which:
which = '' # Return current flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if os.O_APPEND & l_flags: which = which + 'a'
if fcntl.fcntl(file.fileno(), fcntl.F_GETFD, 0) & 1:
which = which + 'c'
if os.O_NDELAY & l_flags: which = which + 'n'
if os.O_SYNC & l_flags: which = which + 's'
return which
def flags(self, *which):
import fcntl, os
if which:
if len(which) > 1:
raise TypeError, 'Too many arguments'
which = which[0]
else: which = '?'
l_flags = 0
if 'n' in which: l_flags = l_flags | os.O_NDELAY
if 'a' in which: l_flags = l_flags | os.O_APPEND
if 's' in which: l_flags = l_flags | os.O_SYNC
file = self._file_
if '=' not in which:
cur_fl = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if '!' in which: l_flags = cur_fl & ~ l_flags
else: l_flags = cur_fl | l_flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFL, l_flags)
if 'c' in which:
arg = ('!' not in which) # 0 is don't, 1 is do close on exec
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFD, arg)
if '?' in which:
which = '' # Return current flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if os.O_APPEND & l_flags: which = which + 'a'
if fcntl.fcntl(file.fileno(), fcntl.F_GETFD, 0) & 1:
which = which + 'c'
if os.O_NDELAY & l_flags: which = which + 'n'
if os.O_SYNC & l_flags: which = which + 's'
return which
def __init__(self):
self.queue = Queue()
PIPE = subprocess.PIPE
self.p = subprocess.Popen(self.cmd, stdout=PIPE)
flags = fcntl.fcntl(self.p.stdout.fileno(), fcntl.F_GETFL)
fcntl.fcntl(self.p.stdout.fileno(), fcntl.F_SETFL, (flags | os.O_NDELAY | os.O_NONBLOCK))
self.out = self.p.stdout
threading.Thread(target=self.sendData).start()
def __init__(self, device="/dev/ttyAMA0", baudrate=9600):
if not device.startswith("/dev/"):
device = "/dev/%s" % device
if isinstance(baudrate, str):
baudrate = int(baudrate)
aname = "B%d" % baudrate
if not hasattr(termios, aname):
raise Exception("Unsupported baudrate")
self.baudrate = baudrate
Bus.__init__(self, "UART", device, os.O_RDWR | os.O_NOCTTY)
fcntl.fcntl(self.fd, fcntl.F_SETFL, os.O_NDELAY)
#backup = termios.tcgetattr(self.fd)
options = termios.tcgetattr(self.fd)
# iflag
options[0] = 0
# oflag
options[1] = 0
# cflag
options[2] |= (termios.CLOCAL | termios.CREAD)
options[2] &= ~termios.PARENB
options[2] &= ~termios.CSTOPB
options[2] &= ~termios.CSIZE
options[2] |= termios.CS8
# lflag
options[3] = 0
speed = getattr(termios, aname)
# input speed
options[4] = speed
# output speed
options[5] = speed
termios.tcsetattr(self.fd, termios.TCSADRAIN, options)
def flags(self, *which):
import fcntl, os
if which:
if len(which) > 1:
raise TypeError, 'Too many arguments'
which = which[0]
else: which = '?'
l_flags = 0
if 'n' in which: l_flags = l_flags | os.O_NDELAY
if 'a' in which: l_flags = l_flags | os.O_APPEND
if 's' in which: l_flags = l_flags | os.O_SYNC
file = self._file_
if '=' not in which:
cur_fl = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if '!' in which: l_flags = cur_fl & ~ l_flags
else: l_flags = cur_fl | l_flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFL, l_flags)
if 'c' in which:
arg = ('!' not in which) # 0 is don't, 1 is do close on exec
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFD, arg)
if '?' in which:
which = '' # Return current flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if os.O_APPEND & l_flags: which = which + 'a'
if fcntl.fcntl(file.fileno(), fcntl.F_GETFD, 0) & 1:
which = which + 'c'
if os.O_NDELAY & l_flags: which = which + 'n'
if os.O_SYNC & l_flags: which = which + 's'
return which
def flags(self, *which):
import fcntl, os
if which:
if len(which) > 1:
raise TypeError, 'Too many arguments'
which = which[0]
else: which = '?'
l_flags = 0
if 'n' in which: l_flags = l_flags | os.O_NDELAY
if 'a' in which: l_flags = l_flags | os.O_APPEND
if 's' in which: l_flags = l_flags | os.O_SYNC
file = self._file_
if '=' not in which:
cur_fl = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if '!' in which: l_flags = cur_fl & ~ l_flags
else: l_flags = cur_fl | l_flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFL, l_flags)
if 'c' in which:
arg = ('!' not in which) # 0 is don't, 1 is do close on exec
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFD, arg)
if '?' in which:
which = '' # Return current flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if os.O_APPEND & l_flags: which = which + 'a'
if fcntl.fcntl(file.fileno(), fcntl.F_GETFD, 0) & 1:
which = which + 'c'
if os.O_NDELAY & l_flags: which = which + 'n'
if os.O_SYNC & l_flags: which = which + 's'
return which
def flags(self, *which):
import fcntl, os
if which:
if len(which) > 1:
raise TypeError, 'Too many arguments'
which = which[0]
else: which = '?'
l_flags = 0
if 'n' in which: l_flags = l_flags | os.O_NDELAY
if 'a' in which: l_flags = l_flags | os.O_APPEND
if 's' in which: l_flags = l_flags | os.O_SYNC
file = self._file_
if '=' not in which:
cur_fl = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if '!' in which: l_flags = cur_fl & ~ l_flags
else: l_flags = cur_fl | l_flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFL, l_flags)
if 'c' in which:
arg = ('!' not in which) # 0 is don't, 1 is do close on exec
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFD, arg)
if '?' in which:
which = '' # Return current flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if os.O_APPEND & l_flags: which = which + 'a'
if fcntl.fcntl(file.fileno(), fcntl.F_GETFD, 0) & 1:
which = which + 'c'
if os.O_NDELAY & l_flags: which = which + 'n'
if os.O_SYNC & l_flags: which = which + 's'
return which
def __init__(self):
self.queue = Queue()
PIPE = subprocess.PIPE
self.p = subprocess.Popen(self.cmd, stdout=PIPE)
flags = fcntl.fcntl(self.p.stdout.fileno(), fcntl.F_GETFL)
fcntl.fcntl(self.p.stdout.fileno(), fcntl.F_SETFL, (flags | os.O_NDELAY | os.O_NONBLOCK))
self.out = self.p.stdout
threading.Thread(target=self.sendData).start()
