def _create_pty_or_pipe(copy_term_size=None):
"""
Try to create a pty and if then fails then create a normal
pipe instead.
@param copy_term_size: If a tty file descriptor is given
then the term size will be copied to the pty.
@type copy_term_size: int
@rtype: tuple
@returns: A tuple of (is_pty, master_fd, slave_fd) where
is_pty is True if a pty was successfully allocated, and
False if a normal pipe was allocated.
"""
got_pty = False
global _disable_openpty, _fbsd_test_pty
if _fbsd_test_pty and not _disable_openpty:
# Test for python openpty breakage after freebsd7 to freebsd8
# upgrade, which results in a 'Function not implemented' error
# and the process being killed.
pid = os.fork()
if pid == 0:
pty.openpty()
os._exit(os.EX_OK)
pid, status = os.waitpid(pid, 0)
if (status & 0xff) == 140:
_disable_openpty = True
_fbsd_test_pty = False
if _disable_openpty:
master_fd, slave_fd = os.pipe()
else:
try:
master_fd, slave_fd = pty.openpty()
got_pty = True
except EnvironmentError as e:
_disable_openpty = True
writemsg("openpty failed: '%s'\n" % str(e),
noiselevel=-1)
del e
master_fd, slave_fd = os.pipe()
if got_pty:
# Disable post-processing of output since otherwise weird
# things like \n -> \r\n transformations may occur.
mode = termios.tcgetattr(slave_fd)
mode[1] &= ~termios.OPOST
termios.tcsetattr(slave_fd, termios.TCSANOW, mode)
if got_pty and \
copy_term_size is not None and \
os.isatty(copy_term_size):
rows, columns = get_term_size()
set_term_size(rows, columns, slave_fd)
return (got_pty, master_fd, slave_fd)
def _create_pty_or_pipe(copy_term_size=None):
"""
Try to create a pty and if then fails then create a normal
pipe instead.
@param copy_term_size: If a tty file descriptor is given
then the term size will be copied to the pty.
@type copy_term_size: int
@rtype: tuple
@return: A tuple of (is_pty, master_fd, slave_fd) where
is_pty is True if a pty was successfully allocated, and
False if a normal pipe was allocated.
"""
got_pty = False
global _disable_openpty, _fbsd_test_pty
if _fbsd_test_pty and not _disable_openpty:
# Test for python openpty breakage after freebsd7 to freebsd8
# upgrade, which results in a 'Function not implemented' error
# and the process being killed.
pid = os.fork()
if pid == 0:
pty.openpty()
os._exit(os.EX_OK)
pid, status = os.waitpid(pid, 0)
if (status & 0xff) == 140:
_disable_openpty = True
_fbsd_test_pty = False
if _disable_openpty:
master_fd, slave_fd = os.pipe()
else:
try:
master_fd, slave_fd = pty.openpty()
got_pty = True
except EnvironmentError as e:
_disable_openpty = True
writemsg("openpty failed: '%s'\n" % str(e),
noiselevel=-1)
del e
master_fd, slave_fd = os.pipe()
if got_pty:
# Disable post-processing of output since otherwise weird
# things like \n -> \r\n transformations may occur.
mode = termios.tcgetattr(slave_fd)
mode[1] &= ~termios.OPOST
termios.tcsetattr(slave_fd, termios.TCSANOW, mode)
if got_pty and \
copy_term_size is not None and \
os.isatty(copy_term_size):
rows, columns = get_term_size()
set_term_size(rows, columns, slave_fd)
return (got_pty, master_fd, slave_fd)
def _can_log(self, slave_fd):
# With sesandbox, logging works through a pty but not through a
# normal pipe. So, disable logging if ptys are broken.
# See Bug #162404.
# TODO: Add support for logging via named pipe (fifo) with
# sesandbox, since EbuildIpcDaemon uses a fifo and it's known
# to be compatible with sesandbox.
return not ("sesandbox" in self.settings.features
and self.settings.selinux_enabled()) or os.isatty(slave_fd)
def _can_log(self, slave_fd):
# With sesandbox, logging works through a pty but not through a
# normal pipe. So, disable logging if ptys are broken.
# See Bug #162404.
# TODO: Add support for logging via named pipe (fifo) with
# sesandbox, since EbuildIpcDaemon uses a fifo and it's known
# to be compatible with sesandbox.
return not ('sesandbox' in self.settings.features \
and self.settings.selinux_enabled()) or os.isatty(slave_fd)
def _can_log(self, slave_fd):
# With sesandbox, logging works through a pty but not through a
# normal pipe. So, disable logging if ptys are broken.
# See Bug #162404.
return not ('sesandbox' in self.settings.features \
and self.settings.selinux_enabled()) or os.isatty(slave_fd)
