def __fork_pty(self):
"""This implements a substitute for the forkpty system call. This
should be more portable than the pty.fork() function. Specifically,
this should work on Solaris.
Modified 10.06.05 by Geoff Marshall: Implemented __fork_pty() method to
resolve the issue with Python's pty.fork() not supporting Solaris,
particularly ssh. Based on patch to posixmodule.c authored by Noah
Spurrier::
http://mail.python.org/pipermail/python-dev/2003-May/035281.html
"""
parent_fd, child_fd = os.openpty()
if parent_fd < 0 or child_fd < 0:
raise ExceptionPexpect, "Error! Could not open pty with os.openpty()."
pid = os.fork()
if pid < 0:
raise ExceptionPexpect, "Error! Failed os.fork()."
elif pid == 0:
# Child.
os.close(parent_fd)
self.__pty_make_controlling_tty(child_fd)
os.dup2(child_fd, 0)
os.dup2(child_fd, 1)
os.dup2(child_fd, 2)
if child_fd > 2:
os.close(child_fd)
else:
# Parent.
os.close(child_fd)
return pid, parent_fd
python类openpty()的实例源码
def test(self):
master, slave = os.openpty()
self.addCleanup(os.close, master)
self.addCleanup(os.close, slave)
if not os.isatty(slave):
self.fail("Slave-end of pty is not a terminal.")
os.write(slave, 'Ping!')
self.assertEqual(os.read(master, 1024), 'Ping!')
def openpty():
"""openpty() -> (master_fd, slave_fd)
Open a pty master/slave pair, using os.openpty() if possible."""
try:
return os.openpty()
except (AttributeError, OSError):
pass
master_fd, slave_name = _open_terminal()
slave_fd = slave_open(slave_name)
return master_fd, slave_fd
def master_open():
"""master_open() -> (master_fd, slave_name)
Open a pty master and return the fd, and the filename of the slave end.
Deprecated, use openpty() instead."""
try:
master_fd, slave_fd = os.openpty()
except (AttributeError, OSError):
pass
else:
slave_name = os.ttyname(slave_fd)
os.close(slave_fd)
return master_fd, slave_name
return _open_terminal()
def test(self):
master, slave = os.openpty()
self.addCleanup(os.close, master)
self.addCleanup(os.close, slave)
if not os.isatty(slave):
self.fail("Slave-end of pty is not a terminal.")
os.write(slave, 'Ping!')
self.assertEqual(os.read(master, 1024), 'Ping!')
def openpty():
"""openpty() -> (master_fd, slave_fd)
Open a pty master/slave pair, using os.openpty() if possible."""
try:
return os.openpty()
except (AttributeError, OSError):
pass
master_fd, slave_name = _open_terminal()
slave_fd = slave_open(slave_name)
return master_fd, slave_fd
def master_open():
"""master_open() -> (master_fd, slave_name)
Open a pty master and return the fd, and the filename of the slave end.
Deprecated, use openpty() instead."""
try:
master_fd, slave_fd = os.openpty()
except (AttributeError, OSError):
pass
else:
slave_name = os.ttyname(slave_fd)
os.close(slave_fd)
return master_fd, slave_name
return _open_terminal()
def openpty():
"""openpty() -> (master_fd, slave_fd)
Open a pty master/slave pair, using os.openpty() if possible."""
try:
return os.openpty()
except (AttributeError, OSError):
pass
master_fd, slave_name = _open_terminal()
slave_fd = slave_open(slave_name)
return master_fd, slave_fd
def master_open():
"""master_open() -> (master_fd, slave_name)
Open a pty master and return the fd, and the filename of the slave end.
Deprecated, use openpty() instead."""
try:
master_fd, slave_fd = os.openpty()
except (AttributeError, OSError):
pass
else:
slave_name = os.ttyname(slave_fd)
os.close(slave_fd)
return master_fd, slave_name
return _open_terminal()
def fork():
"""fork() -> (pid, master_fd)
Fork and make the child a session leader with a controlling terminal."""
try:
pid, fd = os.forkpty()
except (AttributeError, OSError):
pass
else:
if pid == CHILD:
try:
os.setsid()
except OSError:
# os.forkpty() already set us session leader
pass
return pid, fd
master_fd, slave_fd = openpty()
pid = os.fork()
if pid == CHILD:
# Establish a new session.
os.setsid()
os.close(master_fd)
# Slave becomes stdin/stdout/stderr of child.
os.dup2(slave_fd, STDIN_FILENO)
os.dup2(slave_fd, STDOUT_FILENO)
os.dup2(slave_fd, STDERR_FILENO)
if (slave_fd > STDERR_FILENO):
os.close (slave_fd)
# Explicitly open the tty to make it become a controlling tty.
tmp_fd = os.open(os.ttyname(STDOUT_FILENO), os.O_RDWR)
os.close(tmp_fd)
else:
os.close(slave_fd)
# Parent and child process.
return pid, master_fd
def test(self):
master, slave = os.openpty()
self.addCleanup(os.close, master)
self.addCleanup(os.close, slave)
if not os.isatty(slave):
self.fail("Slave-end of pty is not a terminal.")
os.write(slave, b'Ping!')
self.assertEqual(os.read(master, 1024), b'Ping!')
def __fork_pty(self):
'''This implements a substitute for the forkpty system call. This
should be more portable than the pty.fork() function. Specifically,
this should work on Solaris.
Modified 10.06.05 by Geoff Marshall: Implemented __fork_pty() method to
resolve the issue with Python's pty.fork() not supporting Solaris,
particularly ssh. Based on patch to posixmodule.c authored by Noah
Spurrier::
http://mail.python.org/pipermail/python-dev/2003-May/035281.html
'''
parent_fd, child_fd = os.openpty()
if parent_fd < 0 or child_fd < 0:
raise ExceptionPexpect("Could not open with os.openpty().")
pid = os.fork()
if pid == pty.CHILD:
# Child.
os.close(parent_fd)
self.__pty_make_controlling_tty(child_fd)
os.dup2(child_fd, self.STDIN_FILENO)
os.dup2(child_fd, self.STDOUT_FILENO)
os.dup2(child_fd, self.STDERR_FILENO)
else:
# Parent.
os.close(child_fd)
return pid, parent_fd
def _open_pty(self):
"""Create a PTY
"""
# get our terminal params
self.tcattr = termios.tcgetattr(STDIN)
winsize = fcntl.ioctl(STDIN, termios.TIOCGWINSZ, '0123')
# open a pty
self.master, self.slave = os.openpty()
# set the slave's terminal params
termios.tcsetattr(self.slave, termios.TCSANOW, self.tcattr)
fcntl.ioctl(self.slave, termios.TIOCSWINSZ, winsize)
def fork_pty():
'''This implements a substitute for the forkpty system call. This
should be more portable than the pty.fork() function. Specifically,
this should work on Solaris.
Modified 10.06.05 by Geoff Marshall: Implemented __fork_pty() method to
resolve the issue with Python's pty.fork() not supporting Solaris,
particularly ssh. Based on patch to posixmodule.c authored by Noah
Spurrier::
http://mail.python.org/pipermail/python-dev/2003-May/035281.html
'''
parent_fd, child_fd = os.openpty()
if parent_fd < 0 or child_fd < 0:
raise OSError("os.openpty() failed")
pid = os.fork()
if pid == CHILD:
# Child.
os.close(parent_fd)
pty_make_controlling_tty(child_fd)
os.dup2(child_fd, STDIN_FILENO)
os.dup2(child_fd, STDOUT_FILENO)
os.dup2(child_fd, STDERR_FILENO)
else:
# Parent.
os.close(child_fd)
return pid, parent_fd
def test(self):
master, slave = os.openpty()
self.addCleanup(os.close, master)
self.addCleanup(os.close, slave)
if not os.isatty(slave):
self.fail("Slave-end of pty is not a terminal.")
os.write(slave, 'Ping!')
self.assertEqual(os.read(master, 1024), 'Ping!')
def openpty():
"""openpty() -> (master_fd, slave_fd)
Open a pty master/slave pair, using os.openpty() if possible."""
try:
return os.openpty()
except (AttributeError, OSError):
pass
master_fd, slave_name = _open_terminal()
slave_fd = slave_open(slave_name)
return master_fd, slave_fd
def master_open():
"""master_open() -> (master_fd, slave_name)
Open a pty master and return the fd, and the filename of the slave end.
Deprecated, use openpty() instead."""
try:
master_fd, slave_fd = os.openpty()
except (AttributeError, OSError):
pass
else:
slave_name = os.ttyname(slave_fd)
os.close(slave_fd)
return master_fd, slave_name
return _open_terminal()
def fork_pty():
'''This implements a substitute for the forkpty system call. This
should be more portable than the pty.fork() function. Specifically,
this should work on Solaris.
Modified 10.06.05 by Geoff Marshall: Implemented __fork_pty() method to
resolve the issue with Python's pty.fork() not supporting Solaris,
particularly ssh. Based on patch to posixmodule.c authored by Noah
Spurrier::
http://mail.python.org/pipermail/python-dev/2003-May/035281.html
'''
parent_fd, child_fd = os.openpty()
if parent_fd < 0 or child_fd < 0:
raise OSError("os.openpty() failed")
pid = os.fork()
if pid == CHILD:
# Child.
os.close(parent_fd)
pty_make_controlling_tty(child_fd)
os.dup2(child_fd, STDIN_FILENO)
os.dup2(child_fd, STDOUT_FILENO)
os.dup2(child_fd, STDERR_FILENO)
else:
# Parent.
os.close(child_fd)
return pid, parent_fd
def test_openpty(self):
master_fd, slave_fd = os.openpty()
self.addCleanup(os.close, master_fd)
self.addCleanup(os.close, slave_fd)
self.assertEqual(os.get_inheritable(master_fd), False)
self.assertEqual(os.get_inheritable(slave_fd), False)
def test(self):
master, slave = os.openpty()
self.addCleanup(os.close, master)
self.addCleanup(os.close, slave)
if not os.isatty(slave):
self.fail("Slave-end of pty is not a terminal.")
os.write(slave, b'Ping!')
self.assertEqual(os.read(master, 1024), b'Ping!')
