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parent: various style cleanups, remove unused function.

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pull/607/head
David Wilson 6 years ago
parent 3aded0ca95
commit f43f886c37
1 changed files with 40 additions and 47 deletions
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87
mitogen/parent.py
Unescape Escape View File

@ -137,6 +137,9 @@ SIGNAL_BY_NUM = dict(
if name.startswith('SIG') and not name.startswith('SIG_')
)
_core_source_lock = threading.Lock()
_core_source_partial = None
def get_log_level():
return (LOG.level or logging.getLogger().level or logging.INFO)
@ -158,10 +161,6 @@ def get_sys_executable():
return '/usr/bin/python'
_core_source_lock = threading.Lock()
_core_source_partial = None
def _get_core_source():
"""
In non-masters, simply fetch the cached mitogen.core source code via the
@ -213,8 +212,10 @@ def is_immediate_child(msg, stream):
def flags(names):
"""Return the result of ORing a set of (space separated) :py:mod:`termios`
module constants together."""
"""
Return the result of ORing a set of (space separated) :py:mod:`termios`
module constants together.
"""
return sum(getattr(termios, name, 0)
for name in names.split())
@ -223,13 +224,15 @@ def cfmakeraw(tflags):
"""Given a list returned by :py:func:`termios.tcgetattr`, return a list
modified in a manner similar to the `cfmakeraw()` C library function, but
additionally disabling local echo."""
# BSD: https://github.com/freebsd/freebsd/blob/master/lib/libc/gen/termios.c#L162
# Linux: https://github.com/lattera/glibc/blob/master/termios/cfmakeraw.c#L20
# BSD: github.com/freebsd/freebsd/blob/master/lib/libc/gen/termios.c#L162
# Linux: github.com/lattera/glibc/blob/master/termios/cfmakeraw.c#L20
iflag, oflag, cflag, lflag, ispeed, ospeed, cc = tflags
iflag &= ~flags('IMAXBEL IXOFF INPCK BRKINT PARMRK ISTRIP INLCR ICRNL IXON IGNPAR')
iflag &= ~flags('IMAXBEL IXOFF INPCK BRKINT PARMRK '
'ISTRIP INLCR ICRNL IXON IGNPAR')
iflag &= ~flags('IGNBRK BRKINT PARMRK')
oflag &= ~flags('OPOST')
lflag &= ~flags('ECHO ECHOE ECHOK ECHONL ICANON ISIG IEXTEN NOFLSH TOSTOP PENDIN')
lflag &= ~flags('ECHO ECHOE ECHOK ECHONL ICANON ISIG'
'IEXTEN NOFLSH TOSTOP PENDIN')
cflag &= ~flags('CSIZE PARENB')
cflag |= flags('CS8 CREAD')
return [iflag, oflag, cflag, lflag, ispeed, ospeed, cc]
@ -246,14 +249,6 @@ def disable_echo(fd):
termios.tcsetattr(fd, flags, new)
def close_nonstandard_fds():
for fd in xrange(3, SC_OPEN_MAX):
try:
os.close(fd)
except OSError:
pass
def create_socketpair(size=None):
"""
Create a :func:`socket.socketpair` to use for use as a child process's UNIX
@ -309,8 +304,8 @@ def create_child(args, merge_stdio=False, stderr_pipe=False, preexec_fn=None):
"""
Create a child process whose stdin/stdout is connected to a socket.
:param args:
Argument vector for execv() call.
:param list args:
Program argument vector.
:param bool merge_stdio:
If :data:`True`, arrange for `stderr` to be connected to the `stdout`
socketpair, rather than inherited from the parent process. This may be
@ -326,9 +321,9 @@ def create_child(args, merge_stdio=False, stderr_pipe=False, preexec_fn=None):
"""
parentfp, childfp = create_socketpair()
# When running under a monkey patches-enabled gevent, the socket module
# yields file descriptors who already have O_NONBLOCK, which is
# persisted across fork, totally breaking Python. Therefore, drop
# O_NONBLOCK from Python's future stdin fd.
# yields descriptors who already have O_NONBLOCK, which is persisted across
# fork, totally breaking Python. Therefore, drop O_NONBLOCK from Python's
# future stdin fd.
mitogen.core.set_block(childfp.fileno())
stderr_r = None
@ -452,8 +447,7 @@ def tty_create_child(args):
slave end.
:param list args:
:py:func:`os.execl` argument list.
Program argument vector.
:returns:
`(pid, tty_fd, None)`
"""
@ -489,8 +483,7 @@ def hybrid_tty_create_child(args):
attached to a TTY.
:param list args:
:py:func:`os.execl` argument list.
Program argument vector.
:returns:
`(pid, socketpair_fd, tty_fd)`
"""
@ -1187,9 +1180,9 @@ for _klass in mitogen.core.Poller, PollPoller, KqueuePoller, EpollPoller:
if _klass.SUPPORTED:
PREFERRED_POLLER = _klass
# For apps that start threads dynamically, it's possible Latch will also get
# very high-numbered wait fds when there are many connections, and so select()
# becomes useless there too. So swap in our favourite poller.
# For processes that start many threads or connections, it's possible Latch
# will also get high-numbered FDs, and so select() becomes useless there too.
# So swap in our favourite poller.
if PollPoller.SUPPORTED:
mitogen.core.Latch.poller_class = PollPoller
else:
@ -1198,16 +1191,14 @@ else:
class DiagLogStream(mitogen.core.BasicStream):
"""
For "hybrid TTY/socketpair" mode, after a connection has been setup, a
spare TTY file descriptor will exist that cannot be closed, and to which
SSH or sudo may continue writing log messages.
For "hybrid TTY/socketpair" mode, after connection setup a spare TTY master
FD exists that cannot be closed, and to which SSH or sudo may continue
writing log messages.
The descriptor cannot be closed since the UNIX TTY layer will send a
termination signal to any processes whose controlling TTY is the TTY that
has been closed.
DiagLogStream takes over this descriptor and creates corresponding log
messages for anything written to it.
The descriptor cannot be closed since the UNIX TTY layer sends SIGHUP to
processes whose controlling TTY is the slave TTY whose master side has been
closed. LogProtocol takes over this FD and creates log messages for
anything written to it.
"""
def __init__(self, fd, stream):
@ -1573,7 +1564,7 @@ class ChildIdAllocator(object):
for id_ in self.it:
return id_
master = mitogen.core.Context(self.router, 0)
master = self.router.context_by_id(0)
start, end = master.send_await(
mitogen.core.Message(dst_id=0, handle=mitogen.core.ALLOCATE_ID)
)
@ -1830,9 +1821,11 @@ class Context(mitogen.core.Context):
return not (self == other)
def __eq__(self, other):
return (isinstance(other, mitogen.core.Context) and
(other.context_id == self.context_id) and
(other.router == self.router))
return (
isinstance(other, mitogen.core.Context) and
(other.context_id == self.context_id) and
(other.router == self.router)
)
def __hash__(self):
return hash((self.router, self.context_id))
@ -2227,13 +2220,13 @@ class Router(mitogen.core.Router):
kwargs.setdefault(u'debug', self.debug)
kwargs.setdefault(u'profiling', self.profiling)
kwargs.setdefault(u'unidirectional', self.unidirectional)
kwargs.setdefault(u'name', name)
via = kwargs.pop(u'via', None)
if via is not None:
return self.proxy_connect(via, method_name, name=name,
**mitogen.core.Kwargs(kwargs))
return self._connect(klass, name=name,
**mitogen.core.Kwargs(kwargs))
return self.proxy_connect(via, method_name,
**mitogen.core.Kwargs(kwargs))
return self._connect(klass, **mitogen.core.Kwargs(kwargs))
def proxy_connect(self, via_context, method_name, name=None, **kwargs):
resp = via_context.call(_proxy_connect,

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