def _execute_child(self, args, executable, preexec_fn, close_fds,
cwd, env, universal_newlines, startupinfo,
creationflags, shell, to_close, p2cread,
p2cwrite, c2pread, c2pwrite, errread, errwrite):
"""Execute program using posix spawn"""
if isinstance(args, (str, bytes)):
args = [args]
if shell:
args = ["/bin/sh", "-c"] + args
if executable == None:
executable = args[0]
sfa = SpawnFileAction()
# Child file actions
# Close parent's pipe ends
closed_fds = []
if p2cwrite:
sfa.add_close(p2cwrite)
closed_fds.append(p2cwrite)
if c2pread:
sfa.add_close(c2pread)
closed_fds.append(c2pread)
if errread:
sfa.add_close(errread)
closed_fds.append(errread)
# When duping fds, if there arises a situation
# where one of the fds is either 0, 1 or 2, it
# is possible that it is overwritten (#12607).
if c2pwrite == 0:
c2pwrite = os.dup(c2pwrite)
if errwrite == 0 or errwrite == 1:
errwrite = os.dup(errwrite)
# Dup fds for child
if p2cread:
sfa.add_dup2(p2cread, 0)
if c2pwrite:
sfa.add_dup2(c2pwrite, 1)
if errwrite:
sfa.add_dup2(errwrite, 2)
# Close pipe fds. Make sure we don't close the
# same fd more than once.
if p2cread:
sfa.add_close(p2cread)
closed_fds.append(p2cread)
if c2pwrite and c2pwrite not in (p2cread, ):
sfa.add_close(c2pwrite)
closed_fds.append(c2pwrite)
if errwrite and errwrite not in (p2cread, c2pwrite):
sfa.add_close(errwrite)
closed_fds.append(errwrite)
if cwd != None:
os.chdir(cwd)
if preexec_fn:
preexec_fn()
# Close all other fds, if asked for - after
# preexec_fn(), which may open FDs.
if close_fds:
#
# This is a bit tricky. Due to a sad
# behaviour with posix_spawn in nevada
# builds before the fix for 6807216 (in
# nevada 110), (and perhaps on other OS's?)
# you can't have two close actions close the
# same FD, or an error results. So we track
# everything we have closed, then manually
# fstat and close up to the max we have
# closed) . Then we close everything above
# that efficiently with add_close_childfds().
#
for i in range(3, max(closed_fds) + 1):
# scheduled closed already? skip
if i in closed_fds:
continue
try:
os.fstat(i)
sfa.add_close(i)
closed_fds.append(i)
except OSError:
pass
closefrom = max([3, max(closed_fds) + 1])
sfa.add_close_childfds(closefrom)
if env is None:
# If caller didn't pass us an environment in
# env, borrow the env that the current process
# is using.
env = os.environ.copy()
if type(env) == dict:
# The bundled subprocess module takes a dict in
# the "env" argument. Allow that here by doing
# the explicit conversion to a list.
env = [
"{0}={1}".format(k, v) for k, v in six.iteritems(env)
]
self.pid = posix_spawnp(executable, args, sfa, env)
self._child_created = True
if to_close:
def _close_in_parent(fd):
os.close(fd)
to_close.remove(fd)
else:
def _close_in_parent(fd):
os.close(fd)
# Parent
if p2cread and p2cwrite:
_close_in_parent(p2cread)
if c2pwrite and c2pread:
_close_in_parent(c2pwrite)
if errwrite and errread:
_close_in_parent(errwrite)
def _execute_child(self, args, executable, preexec_fn,
close_fds, cwd, env, universal_newlines, startupinfo,
creationflags, shell, p2cread, p2cwrite, c2pread, c2pwrite,
errread, errwrite):
"""Execute program using posix spawn"""
if isinstance(args, types.StringTypes):
args = [args]
if shell:
args = ["/bin/sh", "-c"] + args
if executable == None:
executable = args[0]
sfa = SpawnFileAction()
# Child file actions
# Close parent's pipe ends
closed_fds = []
if p2cwrite:
sfa.add_close(p2cwrite)
closed_fds.append(p2cwrite)
if c2pread:
sfa.add_close(c2pread)
closed_fds.append(c2pread)
if errread:
sfa.add_close(errread)
closed_fds.append(errread)
# Dup fds for child
if p2cread:
sfa.add_dup2(p2cread, 0)
if c2pwrite:
sfa.add_dup2(c2pwrite, 1)
if errwrite:
sfa.add_dup2(errwrite, 2)
# Close pipe fds. Make sure we don't close the
# same fd more than once.
if p2cread:
sfa.add_close(p2cread)
closed_fds.append(p2cread)
if c2pwrite and c2pwrite not in (p2cread,):
sfa.add_close(c2pwrite)
closed_fds.append(c2pwrite)
if errwrite and errwrite not in (p2cread, c2pwrite):
sfa.add_close(errwrite)
closed_fds.append(errwrite)
# Close all other fds, if asked for.
if close_fds:
#
# This is a bit tricky. Due to a sad
# behaviour with posix_spawn in nevada
# builds before the fix for 6807216 (in
# nevada 110), (and perhaps on other OS's?)
# you can't have two close actions close the
# same FD, or an error results. So we track
# everything we have closed, then manually
# fstat and close up to the max we have
# closed) . Then we close everything above
# that efficiently with add_close_childfds().
#
for i in range(3, max(closed_fds) + 1):
# scheduled closed already? skip
if i in closed_fds:
continue
try:
os.fstat(i)
sfa.add_close(i)
closed_fds.append(i)
except OSError:
pass
closefrom = max([3, max(closed_fds) + 1])
sfa.add_close_childfds(closefrom)
if cwd != None:
os.chdir(cwd)
if preexec_fn:
apply(preexec_fn)
if not env:
# If caller didn't pass us an environment in
# env, borrow the env that the current process
# is using.
env = [ "%s=%s" % (k, v) for k, v in\
os.environ.items() ]
self.pid = posix_spawnp(executable, args, sfa, env)
# Parent
if p2cread and p2cwrite:
os.close(p2cread)
if c2pwrite and c2pread:
os.close(c2pwrite)
if errwrite and errread:
os.close(errwrite)
def _execute_child(self, args, executable, preexec_fn, close_fds,
pass_fds, cwd, env, startupinfo, creationflags,
shell, p2cread, p2cwrite, c2pread, c2pwrite,
errread, errwrite, restore_signals,
start_new_session):
if isinstance(args, (str, bytes)):
args = [args]
if shell:
args = ["/bin/sh", "-c"] + args
if executable is None:
executable = args[0]
sfa = SpawnFileAction()
# Child file actions
# Close parent's pipe ends
closed_fds = []
if p2cwrite != -1:
sfa.add_close(p2cwrite)
closed_fds.append(p2cwrite)
if c2pread != -1:
sfa.add_close(c2pread)
closed_fds.append(c2pread)
if errread != -1:
sfa.add_close(errread)
closed_fds.append(errread)
# Dup fds for child
if p2cread != -1:
sfa.add_dup2(p2cread, 0)
if c2pwrite != -1:
sfa.add_dup2(c2pwrite, 1)
if errwrite != -1:
sfa.add_dup2(errwrite, 2)
# Close pipe fds. Make sure we don't close the
# same fd more than once, or standard fds.
for fd in [p2cread, c2pwrite, errwrite]:
if fd > 2 and fd not in closed_fds:
sfa.add_close(fd)
closed_fds.append(fd)
if cwd is not None:
os.chdir(cwd)
if preexec_fn:
preexec_fn()
# Close all other fds, if asked for - after
# preexec_fn(), which may open FDs.
if close_fds:
#
# This is a bit tricky. Due to a sad
# behaviour with posix_spawn in nevada
# builds before the fix for 6807216 (in
# nevada 110), (and perhaps on other OS's?)
# you can't have two close actions close the
# same FD, or an error results. So we track
# everything we have closed, then manually
# fstat and close up to the max we have
# closed) . Then we close everything above
# that efficiently with add_close_childfds().
#
# max() can't call on empty list, use a
# trick "close_fds or [0]" to return 0
# when closed_fds is empty.
for i in range(3, max(closed_fds or [0]) + 1):
# scheduled closed already? skip
if i in closed_fds:
continue
try:
os.fstat(i)
sfa.add_close(i)
closed_fds.append(i)
except OSError:
pass
closefrom = max([3, max(closed_fds or [0]) + 1])
sfa.add_close_childfds(closefrom)
if env is None:
# If caller didn't pass us an environment in
# env, borrow the env that the current process
# is using.
env = os.environ.copy()
if type(env) == dict:
# The bundled subprocess module takes a dict in
# the "env" argument. Allow that here by doing
# the explicit conversion to a list.
env = [
"{0}={1}".format(k, v) for k, v in six.iteritems(env)
]
self.pid = posix_spawnp(executable, args, sfa, env)
self._child_created = True
# parent
devnull_fd = getattr(self, "_devnull", None)
if p2cread != -1 and p2cwrite != -1 and \
p2cread != devnull_fd:
os.close(p2cread)
if c2pwrite != -1 and c2pread != -1 and \
c2pwrite != devnull_fd:
os.close(c2pwrite)
if errwrite != -1 and errread != -1 and \
errwrite != devnull_fd:
os.close(errwrite)
if devnull_fd is not None:
os.close(devnull_fd)
def __execute(self, args, executable, preexec_fn,
close_fds, cwd, env, universal_newlines, startupinfo,
creationflags, shell, p2cread, p2cwrite, c2pread, c2pwrite,
errread, errwrite, to_close=None):
"""Execute program using posix spawn"""
if isinstance(args, (str, bytes)):
args = [args]
if shell:
args = ["/bin/sh", "-c"] + args
if executable == None:
executable = args[0]
sfa = SpawnFileAction()
# Child file actions
# Close parent's pipe ends
closed_fds = []
if p2cwrite:
sfa.add_close(p2cwrite)
closed_fds.append(p2cwrite)
if c2pread:
sfa.add_close(c2pread)
closed_fds.append(c2pread)
if errread:
sfa.add_close(errread)
closed_fds.append(errread)
# When duping fds, if there arises a situation
# where one of the fds is either 0, 1 or 2, it
# is possible that it is overwritten (#12607).
if c2pwrite == 0:
c2pwrite = os.dup(c2pwrite)
if errwrite == 0 or errwrite == 1:
errwrite = os.dup(errwrite)
# Dup fds for child
if p2cread:
sfa.add_dup2(p2cread, 0)
if c2pwrite:
sfa.add_dup2(c2pwrite, 1)
if errwrite:
sfa.add_dup2(errwrite, 2)
# Close pipe fds. Make sure we don't close the
# same fd more than once.
if p2cread:
sfa.add_close(p2cread)
closed_fds.append(p2cread)
if c2pwrite and c2pwrite not in (p2cread,):
sfa.add_close(c2pwrite)
closed_fds.append(c2pwrite)
if errwrite and errwrite not in (p2cread, c2pwrite):
sfa.add_close(errwrite)
closed_fds.append(errwrite)
if cwd != None:
os.chdir(cwd)
if preexec_fn:
preexec_fn()
# Close all other fds, if asked for - after
# preexec_fn(), which may open FDs.
if close_fds:
#
# This is a bit tricky. Due to a sad
# behaviour with posix_spawn in nevada
# builds before the fix for 6807216 (in
# nevada 110), (and perhaps on other OS's?)
# you can't have two close actions close the
# same FD, or an error results. So we track
# everything we have closed, then manually
# fstat and close up to the max we have
# closed) . Then we close everything above
# that efficiently with add_close_childfds().
#
for i in range(3, max(closed_fds) + 1):
# scheduled closed already? skip
if i in closed_fds:
continue
try:
os.fstat(i)
sfa.add_close(i)
closed_fds.append(i)
except OSError:
pass
closefrom = max([3, max(closed_fds) + 1])
sfa.add_close_childfds(closefrom)
if env is None:
# If caller didn't pass us an environment in
# env, borrow the env that the current process
# is using.
env = os.environ.copy()
if type(env) == dict:
# The bundled subprocess module takes a dict in
# the "env" argument. Allow that here by doing
# the explicit conversion to a list.
env = [
"{0}={1}".format(k, v)
for k, v in env.iteritems()
]
self.pid = posix_spawnp(executable, args, sfa, env)
self._child_created = True
if to_close:
def _close_in_parent(fd):
os.close(fd)
to_close.remove(fd)
else:
def _close_in_parent(fd):
os.close(fd)
# Parent
if p2cread and p2cwrite:
_close_in_parent(p2cread)
if c2pwrite and c2pread:
_close_in_parent(c2pwrite)
if errwrite and errread:
_close_in_parent(errwrite)