def __enter__(self):
# NOTE: On os X systems, using pty.setraw() fails. Therefor we are using this:
try:
newattr = termios.tcgetattr(self.fileno)
except termios.error:
pass
else:
newattr[tty.LFLAG] = self._patch_lflag(newattr[tty.LFLAG])
newattr[tty.IFLAG] = self._patch_iflag(newattr[tty.IFLAG])
# VMIN defines the number of characters read at a time in
# non-canonical mode. It seems to default to 1 on Linux, but on
# Solaris and derived operating systems it defaults to 4. (This is
# because the VMIN slot is the same as the VEOF slot, which
# defaults to ASCII EOT = Ctrl-D = 4.)
newattr[tty.CC][termios.VMIN] = 1
termios.tcsetattr(self.fileno, termios.TCSANOW, newattr)
# Put the terminal in cursor mode. (Instead of application mode.)
os.write(self.fileno, b'\x1b[?1l')
python类error()的实例源码
def getchar(echo):
if not isatty(sys.stdin):
f = open('/dev/tty')
fd = f.fileno()
else:
fd = sys.stdin.fileno()
f = None
try:
old_settings = termios.tcgetattr(fd)
try:
tty.setraw(fd)
ch = os.read(fd, 32)
if echo and isatty(sys.stdout):
sys.stdout.write(ch)
finally:
termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
sys.stdout.flush()
if f is not None:
f.close()
except termios.error:
pass
_translate_ch_to_exc(ch)
return ch.decode(get_best_encoding(sys.stdin), 'replace')
def getchar(echo):
if not isatty(sys.stdin):
f = open('/dev/tty')
fd = f.fileno()
else:
fd = sys.stdin.fileno()
f = None
try:
old_settings = termios.tcgetattr(fd)
try:
tty.setraw(fd)
ch = os.read(fd, 32)
if echo and isatty(sys.stdout):
sys.stdout.write(ch)
finally:
termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
sys.stdout.flush()
if f is not None:
f.close()
except termios.error:
pass
_translate_ch_to_exc(ch)
return ch.decode(get_best_encoding(sys.stdin), 'replace')
def getchar(echo):
if not isatty(sys.stdin):
f = open('/dev/tty')
fd = f.fileno()
else:
fd = sys.stdin.fileno()
f = None
try:
old_settings = termios.tcgetattr(fd)
try:
tty.setraw(fd)
ch = os.read(fd, 32)
if echo and isatty(sys.stdout):
sys.stdout.write(ch)
finally:
termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
sys.stdout.flush()
if f is not None:
f.close()
except termios.error:
pass
_translate_ch_to_exc(ch)
return ch.decode(get_best_encoding(sys.stdin), 'replace')
def read(self, size=1):
"""Read size bytes from the serial port. If a timeout is set it may
return less characters as requested. With no timeout it will block
until the requested number of bytes is read."""
if self.fd is None: raise portNotOpenError
read = bytearray()
poll = select.poll()
poll.register(self.fd, select.POLLIN|select.POLLERR|select.POLLHUP|select.POLLNVAL)
if size > 0:
while len(read) < size:
# print "\tread(): size",size, "have", len(read) #debug
# wait until device becomes ready to read (or something fails)
for fd, event in poll.poll(self._timeout*1000):
if event & (select.POLLERR|select.POLLHUP|select.POLLNVAL):
raise SerialException('device reports error (poll)')
# we don't care if it is select.POLLIN or timeout, that's
# handled below
buf = os.read(self.fd, size - len(read))
read.extend(buf)
if ((self._timeout is not None and self._timeout >= 0) or
(self._interCharTimeout is not None and self._interCharTimeout > 0)) and not buf:
break # early abort on timeout
return bytes(read)
def getchar(echo):
if not isatty(sys.stdin):
f = open('/dev/tty')
fd = f.fileno()
else:
fd = sys.stdin.fileno()
f = None
try:
old_settings = termios.tcgetattr(fd)
try:
tty.setraw(fd)
ch = os.read(fd, 32)
if echo and isatty(sys.stdout):
sys.stdout.write(ch)
finally:
termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
sys.stdout.flush()
if f is not None:
f.close()
except termios.error:
pass
_translate_ch_to_exc(ch)
return ch.decode(get_best_encoding(sys.stdin), 'replace')
def getecho(self):
'''This returns the terminal echo mode. This returns True if echo is
on or False if echo is off. Child applications that are expecting you
to enter a password often set ECHO False. See waitnoecho().
Not supported on platforms where ``isatty()`` returns False. '''
try:
attr = termios.tcgetattr(self.child_fd)
except termios.error as err:
errmsg = 'getecho() may not be called on this platform'
if err.args[0] == errno.EINVAL:
raise IOError(err.args[0], '%s: %s.' % (err.args[1], errmsg))
raise
self.echo = bool(attr[3] & termios.ECHO)
return self.echo
def getchar(echo):
if not isatty(sys.stdin):
f = open('/dev/tty')
fd = f.fileno()
else:
fd = sys.stdin.fileno()
f = None
try:
old_settings = termios.tcgetattr(fd)
try:
tty.setraw(fd)
ch = os.read(fd, 32)
if echo and isatty(sys.stdout):
sys.stdout.write(ch)
finally:
termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
sys.stdout.flush()
if f is not None:
f.close()
except termios.error:
pass
_translate_ch_to_exc(ch)
return ch.decode(get_best_encoding(sys.stdin), 'replace')
def _setecho(fd, state):
errmsg = 'setecho() may not be called on this platform'
try:
attr = termios.tcgetattr(fd)
except termios.error as err:
if err.args[0] == errno.EINVAL:
raise IOError(err.args[0], '%s: %s.' % (err.args[1], errmsg))
raise
if state:
attr[3] = attr[3] | termios.ECHO
else:
attr[3] = attr[3] & ~termios.ECHO
try:
# I tried TCSADRAIN and TCSAFLUSH, but these were inconsistent and
# blocked on some platforms. TCSADRAIN would probably be ideal.
termios.tcsetattr(fd, termios.TCSANOW, attr)
except IOError as err:
if err.args[0] == errno.EINVAL:
raise IOError(err.args[0], '%s: %s.' % (err.args[1], errmsg))
raise
def getecho(self):
'''This returns the terminal echo mode. This returns True if echo is
on or False if echo is off. Child applications that are expecting you
to enter a password often set ECHO False. See waitnoecho().
Not supported on platforms where ``isatty()`` returns False. '''
try:
attr = termios.tcgetattr(self.fd)
except termios.error as err:
errmsg = 'getecho() may not be called on this platform'
if err.args[0] == errno.EINVAL:
raise IOError(err.args[0], '%s: %s.' % (err.args[1], errmsg))
raise
self.echo = bool(attr[3] & termios.ECHO)
return self.echo
def getchar(echo):
if not isatty(sys.stdin):
f = open('/dev/tty')
fd = f.fileno()
else:
fd = sys.stdin.fileno()
f = None
try:
old_settings = termios.tcgetattr(fd)
try:
tty.setraw(fd)
ch = os.read(fd, 32)
if echo and isatty(sys.stdout):
sys.stdout.write(ch)
finally:
termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
sys.stdout.flush()
if f is not None:
f.close()
except termios.error:
pass
_translate_ch_to_exc(ch)
return ch.decode(get_best_encoding(sys.stdin), 'replace')
def push_char(self, char):
self.partial_char += char
try:
c = unicode(self.partial_char, self.encoding)
except UnicodeError, e:
if len(e.args) > 4 and \
e.args[4] == 'unexpected end of data':
pass
else:
# was: "raise". But it crashes pyrepl, and by extension the
# pypy currently running, in which we are e.g. in the middle
# of some debugging session. Argh. Instead just print an
# error message to stderr and continue running, for now.
self.partial_char = ''
sys.stderr.write('\n%s: %s\n' % (e.__class__.__name__, e))
else:
self.partial_char = ''
self.event_queue.push(c)
def getchar(echo):
if not isatty(sys.stdin):
f = open('/dev/tty')
fd = f.fileno()
else:
fd = sys.stdin.fileno()
f = None
try:
old_settings = termios.tcgetattr(fd)
try:
tty.setraw(fd)
ch = os.read(fd, 32)
if echo and isatty(sys.stdout):
sys.stdout.write(ch)
finally:
termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
sys.stdout.flush()
if f is not None:
f.close()
except termios.error:
pass
_translate_ch_to_exc(ch)
return ch.decode(get_best_encoding(sys.stdin), 'replace')
def getchar(echo):
if not isatty(sys.stdin):
f = open('/dev/tty')
fd = f.fileno()
else:
fd = sys.stdin.fileno()
f = None
try:
old_settings = termios.tcgetattr(fd)
try:
tty.setraw(fd)
ch = os.read(fd, 32)
if echo and isatty(sys.stdout):
sys.stdout.write(ch)
finally:
termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
sys.stdout.flush()
if f is not None:
f.close()
except termios.error:
pass
_translate_ch_to_exc(ch)
return ch.decode(get_best_encoding(sys.stdin), 'replace')
def _setecho(fd, state):
errmsg = 'setecho() may not be called on this platform'
try:
attr = termios.tcgetattr(fd)
except termios.error as err:
if err.args[0] == errno.EINVAL:
raise IOError(err.args[0], '%s: %s.' % (err.args[1], errmsg))
raise
if state:
attr[3] = attr[3] | termios.ECHO
else:
attr[3] = attr[3] & ~termios.ECHO
try:
# I tried TCSADRAIN and TCSAFLUSH, but these were inconsistent and
# blocked on some platforms. TCSADRAIN would probably be ideal.
termios.tcsetattr(fd, termios.TCSANOW, attr)
except IOError as err:
if err.args[0] == errno.EINVAL:
raise IOError(err.args[0], '%s: %s.' % (err.args[1], errmsg))
raise
def getecho(self):
'''This returns the terminal echo mode. This returns True if echo is
on or False if echo is off. Child applications that are expecting you
to enter a password often set ECHO False. See waitnoecho().
Not supported on platforms where ``isatty()`` returns False. '''
try:
attr = termios.tcgetattr(self.fd)
except termios.error as err:
errmsg = 'getecho() may not be called on this platform'
if err.args[0] == errno.EINVAL:
raise IOError(err.args[0], '%s: %s.' % (err.args[1], errmsg))
raise
self.echo = bool(attr[3] & termios.ECHO)
return self.echo
def _raw_input(prompt="", stream=None, input=None):
# This doesn't save the string in the GNU readline history.
if not stream:
stream = sys.stderr
if not input:
input = sys.stdin
prompt = str(prompt)
if prompt:
try:
stream.write(prompt)
except UnicodeEncodeError:
# Use replace error handler to get as much as possible printed.
prompt = prompt.encode(stream.encoding, 'replace')
prompt = prompt.decode(stream.encoding)
stream.write(prompt)
stream.flush()
# NOTE: The Python C API calls flockfile() (and unlock) during readline.
line = input.readline()
if not line:
raise EOFError
if line[-1] == '\n':
line = line[:-1]
return line
def getecho(self):
'''This returns the terminal echo mode. This returns True if echo is
on or False if echo is off. Child applications that are expecting you
to enter a password often set ECHO False. See waitnoecho().
Not supported on platforms where ``isatty()`` returns False. '''
try:
attr = termios.tcgetattr(self.child_fd)
except termios.error as err:
errmsg = 'getecho() may not be called on this platform'
if err.args[0] == errno.EINVAL:
raise IOError(err.args[0], '%s: %s.' % (err.args[1], errmsg))
raise
self.echo = bool(attr[3] & termios.ECHO)
return self.echo
def getchar(echo):
if not isatty(sys.stdin):
f = open('/dev/tty')
fd = f.fileno()
else:
fd = sys.stdin.fileno()
f = None
try:
old_settings = termios.tcgetattr(fd)
try:
tty.setraw(fd)
ch = os.read(fd, 32)
if echo and isatty(sys.stdout):
sys.stdout.write(ch)
finally:
termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
sys.stdout.flush()
if f is not None:
f.close()
except termios.error:
pass
_translate_ch_to_exc(ch)
return ch.decode(get_best_encoding(sys.stdin), 'replace')
def getchar(echo):
if not isatty(sys.stdin):
f = open('/dev/tty')
fd = f.fileno()
else:
fd = sys.stdin.fileno()
f = None
try:
old_settings = termios.tcgetattr(fd)
try:
tty.setraw(fd)
ch = os.read(fd, 32)
if echo and isatty(sys.stdout):
sys.stdout.write(ch)
finally:
termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
sys.stdout.flush()
if f is not None:
f.close()
except termios.error:
pass
_translate_ch_to_exc(ch)
return ch.decode(get_best_encoding(sys.stdin), 'replace')
