def kill_cmd(self):
if self.cmd_pid > 1:
try:
os.close(self.cmd_fd)
except OSError, e:
if e.errno == errno.EBADF:
pass # already closed
else:
raise e
try:
os.kill(self.cmd_pid, signal.SIGKILL)
os.waitpid(self.cmd_pid, 0)
except OSError, e:
if e.errno not in [errno.ECHILD, errno.ESRCH]:
raise Exception('unhandled errno: %d' % e.errno)
self.cmd_pid = -1
python类ECHILD的实例源码
def kill_cmd(self):
if self.cmd_pid > 1:
try:
os.close(self.cmd_fd)
except OSError, e:
if e.errno == errno.EBADF:
pass # already closed
else:
raise e
try:
os.kill(self.cmd_pid, signal.SIGKILL)
os.waitpid(self.cmd_pid, 0)
except OSError, e:
if e.errno not in [errno.ECHILD, errno.ESRCH]:
raise Exception('unhandled errno: %d' % e.errno)
self.cmd_pid = -1
def _kill_ssh(self):
if self.ssh_pid > 1:
try:
os.kill(self.ssh_pid, signal.SIGTERM)
os.waitpid(self.ssh_pid, 0)
except OSError, e:
if e.errno not in [errno.ECHILD, errno.ESRCH]:
raise Exception('unhandled errno: %d' % e.errno)
self.self_pid = -1
try:
os.close(self.ssh_fd)
except OSError, e:
if e.errno == errno.EBADF:
pass # already closed
else:
print 'WHAT?', e
raise e
def close_session(self, authkey):
session = self.sessions[authkey] # (Session, RemoteSession) tuple
released = []
# loop through share allocators
for a in self.allocators:
allocator = self.allocators[a]
released.extend(self.allocators[a].close_session(session))
try:
session[LOCAL].terminate() # don't bother being nice.
except OSError, e:
if e.errno not in [errno.ECHILD, errno.ESRCH]:
raise Exception('unhandled errno: %d' % e.errno)
del self.sessions[authkey]
# re-add released resources to the remote master broker if this broker
# is configured to share
if released and self.is_sharing():
self.update_sharing()
if not self.allocating:
# handover in progress. shut down when no sessions with allocations
# remain
if not self.sessions:
self.shutdown(Exit('broker restarted. please reconnect'))
def _kill_ssh(self):
if self.ssh_pid > 1:
try:
os.kill(self.ssh_pid, signal.SIGTERM)
os.waitpid(self.ssh_pid, 0)
except OSError, e:
if e.errno not in [errno.ECHILD, errno.ESRCH]:
raise Exception('unhandled errno: %d' % e.errno)
self.self_pid = -1
try:
os.close(self.ssh_fd)
except OSError, e:
if e.errno == errno.EBADF:
pass # already closed
else:
print 'WHAT?', e
raise e
def shutdown(self, details=None):
# terminate all processes started by the broker
if self.hsl:
self.hsl.terminate()
if self.brl:
self.brl.terminate()
if self.wlan_lister:
self.wlan_lister.terminate()
if self.pm_lister:
self.pm_lister.terminate()
self.stop_sharing()
for session in self.sessions.values():
try:
# send SIGTERM, not SIGKILL, so that Session.shutdown() runs
session[LOCAL].terminate()
except OSError, e:
if e.errno not in [errno.ECHILD, errno.ESRCH]:
raise Exception('unhandled errno: %d' % e.errno)
Control.shutdown(self, details) # does not return. always do last
def _waitpid(self, wanted_pid):
if wanted_pid:
if wanted_pid not in self.dict:
raise PtraceError("Unknown PID: %r" % wanted_pid, pid=wanted_pid)
debug("Wait process %s" % wanted_pid)
try:
pid, status = waitpid(wanted_pid, 0)
except OSError, err:
if err.errno == ECHILD:
process = self[wanted_pid]
raise process.processTerminated()
else:
raise err
else:
debug("Wait any process")
pid, status = waitpid(-1, 0)
if wanted_pid and pid != wanted_pid:
raise PtraceError("Unwanted PID: %r (instead of %s)"
% (pid, wanted_pid), pid=pid)
return pid, status
def _internal_poll(self, _deadstate=None, _waitpid=os.waitpid,
_WNOHANG=os.WNOHANG, _os_error=os.error, _ECHILD=errno.ECHILD):
"""Check if child process has terminated. Returns returncode
attribute.
This method is called by __del__, so it cannot reference anything
outside of the local scope (nor can any methods it calls).
"""
if self.returncode is None:
try:
pid, sts = _waitpid(self.pid, _WNOHANG)
if pid == self.pid:
self._handle_exitstatus(sts)
except _os_error as e:
if _deadstate is not None:
self.returncode = _deadstate
if e.errno == _ECHILD:
# This happens if SIGCLD is set to be ignored or
# waiting for child processes has otherwise been
# disabled for our process. This child is dead, we
# can't get the status.
# http://bugs.python.org/issue15756
self.returncode = 0
return self.returncode
def wait(self):
"""Wait for child process to terminate. Returns returncode
attribute."""
while self.returncode is None:
try:
pid, sts = _eintr_retry_call(os.waitpid, self.pid, 0)
except OSError as e:
if e.errno != errno.ECHILD:
raise
# This happens if SIGCLD is set to be ignored or waiting
# for child processes has otherwise been disabled for our
# process. This child is dead, we can't get the status.
pid = self.pid
sts = 0
# Check the pid and loop as waitpid has been known to return
# 0 even without WNOHANG in odd situations. issue14396.
if pid == self.pid:
self._handle_exitstatus(sts)
return self.returncode
def poll(self, flag=os.WNOHANG):
if self.returncode is None:
while True:
try:
pid, sts = os.waitpid(self.pid, flag)
except os.error as e:
if e.errno == errno.EINTR:
continue
# Child process not yet created. See #1731717
# e.errno == errno.ECHILD == 10
return None
else:
break
if pid == self.pid:
if os.WIFSIGNALED(sts):
self.returncode = -os.WTERMSIG(sts)
else:
assert os.WIFEXITED(sts)
self.returncode = os.WEXITSTATUS(sts)
return self.returncode
def run(command):
child_pid = os.fork()
if child_pid == 0:
os.execlp(command[0], *command)
else:
while True:
try:
os.waitpid(child_pid, 0)
except OSError as error:
if error.errno == errno.ECHILD:
# No child processes.
# It has exited already.
break
elif error.errno == errno.EINTR:
# Interrupted system call.
# This happens when resizing the terminal.
pass
else:
# An actual error occurred.
raise
def _internal_poll(self, _deadstate=None, _waitpid=os.waitpid,
_WNOHANG=os.WNOHANG, _os_error=os.error, _ECHILD=errno.ECHILD):
"""Check if child process has terminated. Returns returncode
attribute.
This method is called by __del__, so it cannot reference anything
outside of the local scope (nor can any methods it calls).
"""
if self.returncode is None:
try:
pid, sts = _waitpid(self.pid, _WNOHANG)
if pid == self.pid:
self._handle_exitstatus(sts)
except _os_error as e:
if _deadstate is not None:
self.returncode = _deadstate
if e.errno == _ECHILD:
# This happens if SIGCLD is set to be ignored or
# waiting for child processes has otherwise been
# disabled for our process. This child is dead, we
# can't get the status.
# http://bugs.python.org/issue15756
self.returncode = 0
return self.returncode
def wait(self):
"""Wait for child process to terminate. Returns returncode
attribute."""
while self.returncode is None:
try:
pid, sts = _eintr_retry_call(os.waitpid, self.pid, 0)
except OSError as e:
if e.errno != errno.ECHILD:
raise
# This happens if SIGCLD is set to be ignored or waiting
# for child processes has otherwise been disabled for our
# process. This child is dead, we can't get the status.
pid = self.pid
sts = 0
# Check the pid and loop as waitpid has been known to return
# 0 even without WNOHANG in odd situations. issue14396.
if pid == self.pid:
self._handle_exitstatus(sts)
return self.returncode
def _internal_poll(self, _deadstate=None, _waitpid=os.waitpid,
_WNOHANG=os.WNOHANG, _os_error=os.error, _ECHILD=errno.ECHILD):
"""Check if child process has terminated. Returns returncode
attribute.
This method is called by __del__, so it cannot reference anything
outside of the local scope (nor can any methods it calls).
"""
if self.returncode is None:
try:
pid, sts = _waitpid(self.pid, _WNOHANG)
if pid == self.pid:
self._handle_exitstatus(sts)
except _os_error as e:
if _deadstate is not None:
self.returncode = _deadstate
if e.errno == _ECHILD:
# This happens if SIGCLD is set to be ignored or
# waiting for child processes has otherwise been
# disabled for our process. This child is dead, we
# can't get the status.
# http://bugs.python.org/issue15756
self.returncode = 0
return self.returncode
def wait(self):
"""Wait for child process to terminate. Returns returncode
attribute."""
while self.returncode is None:
try:
pid, sts = _eintr_retry_call(os.waitpid, self.pid, 0)
except OSError as e:
if e.errno != errno.ECHILD:
raise
# This happens if SIGCLD is set to be ignored or waiting
# for child processes has otherwise been disabled for our
# process. This child is dead, we can't get the status.
pid = self.pid
sts = 0
# Check the pid and loop as waitpid has been known to return
# 0 even without WNOHANG in odd situations. issue14396.
if pid == self.pid:
self._handle_exitstatus(sts)
return self.returncode
def wait_on_children(self):
"""Wait on children exit."""
while self.running:
try:
pid, status = os.wait()
if os.WIFEXITED(status) or os.WIFSIGNALED(status):
self._remove_children(pid)
self._verify_and_respawn_children(pid, status)
except OSError as err:
if err.errno not in (errno.EINTR, errno.ECHILD):
raise
except KeyboardInterrupt:
LOG.info(_LI('Caught keyboard interrupt. Exiting.'))
os.killpg(0, signal.SIGTERM)
break
except exception.SIGHUPInterrupt:
self.reload()
continue
eventlet.greenio.shutdown_safe(self.sock)
self.sock.close()
LOG.debug('Exited')
def _internal_poll(self, _deadstate=None, _waitpid=os.waitpid,
_WNOHANG=os.WNOHANG, _os_error=os.error, _ECHILD=errno.ECHILD):
"""Check if child process has terminated. Returns returncode
attribute.
This method is called by __del__, so it cannot reference anything
outside of the local scope (nor can any methods it calls).
"""
if self.returncode is None:
try:
pid, sts = _waitpid(self.pid, _WNOHANG)
if pid == self.pid:
self._handle_exitstatus(sts)
except _os_error as e:
if _deadstate is not None:
self.returncode = _deadstate
if e.errno == _ECHILD:
# This happens if SIGCLD is set to be ignored or
# waiting for child processes has otherwise been
# disabled for our process. This child is dead, we
# can't get the status.
# http://bugs.python.org/issue15756
self.returncode = 0
return self.returncode
def wait(self):
"""Wait for child process to terminate. Returns returncode
attribute."""
while self.returncode is None:
try:
pid, sts = _eintr_retry_call(os.waitpid, self.pid, 0)
except OSError as e:
if e.errno != errno.ECHILD:
raise
# This happens if SIGCLD is set to be ignored or waiting
# for child processes has otherwise been disabled for our
# process. This child is dead, we can't get the status.
pid = self.pid
sts = 0
# Check the pid and loop as waitpid has been known to return
# 0 even without WNOHANG in odd situations. issue14396.
if pid == self.pid:
self._handle_exitstatus(sts)
return self.returncode
def poll(self, flag=os.WNOHANG):
if self.returncode is None:
while True:
try:
pid, sts = os.waitpid(self.pid, flag)
except os.error as e:
if e.errno == errno.EINTR:
continue
# Child process not yet created. See #1731717
# e.errno == errno.ECHILD == 10
return None
else:
break
if pid == self.pid:
if os.WIFSIGNALED(sts):
self.returncode = -os.WTERMSIG(sts)
else:
assert os.WIFEXITED(sts)
self.returncode = os.WEXITSTATUS(sts)
return self.returncode
def _internal_poll(self, _deadstate=None, _waitpid=os.waitpid,
_WNOHANG=os.WNOHANG, _os_error=os.error, _ECHILD=errno.ECHILD):
"""Check if child process has terminated. Returns returncode
attribute.
This method is called by __del__, so it cannot reference anything
outside of the local scope (nor can any methods it calls).
"""
if self.returncode is None:
try:
pid, sts = _waitpid(self.pid, _WNOHANG)
if pid == self.pid:
self._handle_exitstatus(sts)
except _os_error as e:
if _deadstate is not None:
self.returncode = _deadstate
if e.errno == _ECHILD:
# This happens if SIGCLD is set to be ignored or
# waiting for child processes has otherwise been
# disabled for our process. This child is dead, we
# can't get the status.
# http://bugs.python.org/issue15756
self.returncode = 0
return self.returncode
def wait(self):
"""Wait for child process to terminate. Returns returncode
attribute."""
while self.returncode is None:
try:
pid, sts = _eintr_retry_call(os.waitpid, self.pid, 0)
except OSError as e:
if e.errno != errno.ECHILD:
raise
# This happens if SIGCLD is set to be ignored or waiting
# for child processes has otherwise been disabled for our
# process. This child is dead, we can't get the status.
pid = self.pid
sts = 0
# Check the pid and loop as waitpid has been known to return
# 0 even without WNOHANG in odd situations. issue14396.
if pid == self.pid:
self._handle_exitstatus(sts)
return self.returncode
def poll(self, flag=os.WNOHANG):
if self.returncode is None:
while True:
try:
pid, sts = os.waitpid(self.pid, flag)
except os.error as e:
if e.errno == errno.EINTR:
continue
# Child process not yet created. See #1731717
# e.errno == errno.ECHILD == 10
return None
else:
break
if pid == self.pid:
if os.WIFSIGNALED(sts):
self.returncode = -os.WTERMSIG(sts)
else:
assert os.WIFEXITED(sts)
self.returncode = os.WEXITSTATUS(sts)
return self.returncode
def wait(self, timeout=0):
"""
Wait for child process to terminate. Returns returncode
attribute.
"""
if self.returncode is None:
try:
pid, sts = _eintr_retry_call(os.waitpid, self.pid, 0)
except OSError, e:
if e.errno != errno.ECHILD:
raise
#: This happens if SIGCLD is set to be ignored or waiting
#: For child processes has otherwise been disabled for our
#: process. This child is dead, we can't get the status.
sts = 0
self._handle_exitstatus(sts)
return self.returncode
def _internal_poll(self, _deadstate=None, _waitpid=os.waitpid,
_WNOHANG=os.WNOHANG, _os_error=os.error, _ECHILD=errno.ECHILD):
"""Check if child process has terminated. Returns returncode
attribute.
This method is called by __del__, so it cannot reference anything
outside of the local scope (nor can any methods it calls).
"""
if self.returncode is None:
try:
pid, sts = _waitpid(self.pid, _WNOHANG)
if pid == self.pid:
self._handle_exitstatus(sts)
except _os_error as e:
if _deadstate is not None:
self.returncode = _deadstate
if e.errno == _ECHILD:
# This happens if SIGCLD is set to be ignored or
# waiting for child processes has otherwise been
# disabled for our process. This child is dead, we
# can't get the status.
# http://bugs.python.org/issue15756
self.returncode = 0
return self.returncode
def wait(self):
"""Wait for child process to terminate. Returns returncode
attribute."""
while self.returncode is None:
try:
pid, sts = _eintr_retry_call(os.waitpid, self.pid, 0)
except OSError as e:
if e.errno != errno.ECHILD:
raise
# This happens if SIGCLD is set to be ignored or waiting
# for child processes has otherwise been disabled for our
# process. This child is dead, we can't get the status.
pid = self.pid
sts = 0
# Check the pid and loop as waitpid has been known to return
# 0 even without WNOHANG in odd situations. issue14396.
if pid == self.pid:
self._handle_exitstatus(sts)
return self.returncode
def poll(self, flag=os.WNOHANG):
if self.returncode is None:
while True:
try:
pid, sts = os.waitpid(self.pid, flag)
except os.error as e:
if e.errno == errno.EINTR:
continue
# Child process not yet created. See #1731717
# e.errno == errno.ECHILD == 10
return None
else:
break
if pid == self.pid:
if os.WIFSIGNALED(sts):
self.returncode = -os.WTERMSIG(sts)
else:
assert os.WIFEXITED(sts)
self.returncode = os.WEXITSTATUS(sts)
return self.returncode
def _internal_poll(self, _deadstate=None, _waitpid=os.waitpid,
_WNOHANG=os.WNOHANG, _os_error=os.error, _ECHILD=errno.ECHILD):
"""Check if child process has terminated. Returns returncode
attribute.
This method is called by __del__, so it cannot reference anything
outside of the local scope (nor can any methods it calls).
"""
if self.returncode is None:
try:
pid, sts = _waitpid(self.pid, _WNOHANG)
if pid == self.pid:
self._handle_exitstatus(sts)
except _os_error as e:
if _deadstate is not None:
self.returncode = _deadstate
elif e.errno == _ECHILD:
# This happens if SIGCLD is set to be ignored or
# waiting for child processes has otherwise been
# disabled for our process. This child is dead, we
# can't get the status.
# http://bugs.python.org/issue15756
self.returncode = 0
return self.returncode
def wait(self, timeout=None, check_interval=0.01):
# Instead of a blocking OS call, this version of wait() uses logic
# borrowed from the eventlet 0.2 processes.Process.wait() method.
if timeout is not None:
endtime = time.time() + timeout
try:
while True:
status = self.poll()
if status is not None:
return status
if timeout is not None and time.time() > endtime:
raise TimeoutExpired(self.args, timeout)
eventlet.sleep(check_interval)
except OSError as e:
if e.errno == errno.ECHILD:
# no child process, this happens if the child process
# already died and has been cleaned up
return -1
else:
raise
def _internal_poll(self, _deadstate=None, _waitpid=os.waitpid,
_WNOHANG=os.WNOHANG, _os_error=os.error, _ECHILD=errno.ECHILD):
"""Check if child process has terminated. Returns returncode
attribute.
This method is called by __del__, so it cannot reference anything
outside of the local scope (nor can any methods it calls).
"""
if self.returncode is None:
try:
pid, sts = _waitpid(self.pid, _WNOHANG)
if pid == self.pid:
self._handle_exitstatus(sts)
except _os_error as e:
if _deadstate is not None:
self.returncode = _deadstate
if e.errno == _ECHILD:
# This happens if SIGCLD is set to be ignored or
# waiting for child processes has otherwise been
# disabled for our process. This child is dead, we
# can't get the status.
# http://bugs.python.org/issue15756
self.returncode = 0
return self.returncode
def wait(self):
"""Wait for child process to terminate. Returns returncode
attribute."""
while self.returncode is None:
try:
pid, sts = _eintr_retry_call(os.waitpid, self.pid, 0)
except OSError as e:
if e.errno != errno.ECHILD:
raise
# This happens if SIGCLD is set to be ignored or waiting
# for child processes has otherwise been disabled for our
# process. This child is dead, we can't get the status.
pid = self.pid
sts = 0
# Check the pid and loop as waitpid has been known to return
# 0 even without WNOHANG in odd situations. issue14396.
if pid == self.pid:
self._handle_exitstatus(sts)
return self.returncode
