本文整理匯總了Python中fcntl.F_SETFD屬性的典型用法代碼示例。如果您正苦於以下問題:Python fcntl.F_SETFD屬性的具體用法?Python fcntl.F_SETFD怎麽用?Python fcntl.F_SETFD使用的例子?那麽, 這裏精選的屬性代碼示例或許可以為您提供幫助。您也可以進一步了解該屬性所在類fcntl
的用法示例。
在下文中一共展示了fcntl.F_SETFD屬性的15個代碼示例,這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚,您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: _set_cloexec
# 需要導入模塊: import fcntl [as 別名]
# 或者: from fcntl import F_SETFD [as 別名]
def _set_cloexec(self):
"""Set the CLOEXEC flag on all open files (except stdin/out/err).
If self.max_cloexec_files is an integer (the default), then on
platforms which support it, it represents the max open files setting
for the operating system. This function will be called just before
the process is restarted via os.execv() to prevent open files
from persisting into the new process.
Set self.max_cloexec_files to 0 to disable this behavior.
"""
for fd in range(3, self.max_cloexec_files): # skip stdin/out/err
try:
flags = fcntl.fcntl(fd, fcntl.F_GETFD)
except IOError:
continue
fcntl.fcntl(fd, fcntl.F_SETFD, flags | fcntl.FD_CLOEXEC)
示例2: get_vm_logger
# 需要導入模塊: import fcntl [as 別名]
# 或者: from fcntl import F_SETFD [as 別名]
def get_vm_logger(vmname):
'''Initialise logging for particular VM name
:param str vmname: VM's name
:rtype: :py:class:`logging.Logger`
'''
logger = logging.getLogger('vm.' + vmname)
if logger.handlers:
return logger
old_umask = os.umask(0o007)
try:
handler = logging.FileHandler(
os.path.join(LOGPATH, 'vm-{}.log'.format(vmname)))
fcntl.fcntl(handler.stream.fileno(),
fcntl.F_SETFD, fcntl.FD_CLOEXEC)
finally:
os.umask(old_umask)
handler.setFormatter(formatter_log)
logger.addHandler(handler)
return logger
示例3: write_pid_or_exit
# 需要導入模塊: import fcntl [as 別名]
# 或者: from fcntl import F_SETFD [as 別名]
def write_pid_or_exit(self):
self.pf = open(self.pidfile, 'w+r')
pf = self.pf
fd = pf.fileno()
fcntl.fcntl(fd, fcntl.F_SETFD,
fcntl.fcntl(fd, fcntl.F_GETFD, 0)
| fcntl.FD_CLOEXEC)
try:
pid = os.getpid()
logger.debug('write pid:' + str(pid))
pf.truncate(0)
pf.write(str(pid))
pf.flush()
except Exception as e:
logger.exception('write pid failed.' + repr(e))
sys.exit(0)
示例4: set_inheritable
# 需要導入模塊: import fcntl [as 別名]
# 或者: from fcntl import F_SETFD [as 別名]
def set_inheritable(fd, inheritable):
# On py34+ we can use os.set_inheritable but < py34 we must polyfill
# with fcntl and SetHandleInformation
if hasattr(os, 'get_inheritable'):
if os.get_inheritable(fd) != inheritable:
os.set_inheritable(fd, inheritable)
elif WIN:
h = get_handle(fd)
flags = winapi.HANDLE_FLAG_INHERIT if inheritable else 0
winapi.SetHandleInformation(h, winapi.HANDLE_FLAG_INHERIT, flags)
else:
flags = fcntl.fcntl(fd, fcntl.F_GETFD)
if inheritable:
new_flags = flags & ~fcntl.FD_CLOEXEC
else:
new_flags = flags | fcntl.FD_CLOEXEC
if new_flags != flags:
fcntl.fcntl(fd, fcntl.F_SETFD, new_flags)
示例5: sys_generic_fcntl64
# 需要導入模塊: import fcntl [as 別名]
# 或者: from fcntl import F_SETFD [as 別名]
def sys_generic_fcntl64(jitter, linux_env):
# Parse arguments
fd, cmd, arg = jitter.syscall_args_systemv(3)
log.debug("sys_fcntl(%x, %x, %x)", fd, cmd, arg)
# Stub
fdesc = linux_env.file_descriptors[fd]
if cmd == fcntl.F_GETFL:
jitter.syscall_ret_systemv(fdesc.flags)
elif cmd == fcntl.F_SETFL:
# Ignore flag change
jitter.syscall_ret_systemv(0)
elif cmd == fcntl.F_GETFD:
jitter.syscall_ret_systemv(fdesc.flags)
elif cmd == fcntl.F_SETFD:
# Ignore flag change
jitter.syscall_ret_systemv(0)
else:
raise RuntimeError("Not implemented")
示例6: set_fd_flag
# 需要導入模塊: import fcntl [as 別名]
# 或者: from fcntl import F_SETFD [as 別名]
def set_fd_flag(fd, flag):
"""Set a flag on a file descriptor.
``fd`` is the file descriptor or file object, ``flag`` the flag as integer.
"""
flags = fcntl.fcntl(fd, fcntl.F_GETFD, 0)
fcntl.fcntl(fd, fcntl.F_SETFD, flags | flag)
示例7: _set_cloexec
# 需要導入模塊: import fcntl [as 別名]
# 或者: from fcntl import F_SETFD [as 別名]
def _set_cloexec(fd):
try:
flags = _fcntl.fcntl(fd, _fcntl.F_GETFD, 0)
except OSError:
pass
else:
# flags read successfully, modify
flags |= _fcntl.FD_CLOEXEC
_fcntl.fcntl(fd, _fcntl.F_SETFD, flags)
示例8: __init__
# 需要導入模塊: import fcntl [as 別名]
# 或者: from fcntl import F_SETFD [as 別名]
def __init__(self, addr, requestHandler=SimpleXMLRPCRequestHandler,
logRequests=True, allow_none=False, encoding=None,
bind_and_activate=True, use_builtin_types=False):
self.logRequests = logRequests
SimpleXMLRPCDispatcher.__init__(self, allow_none, encoding, use_builtin_types)
socketserver.TCPServer.__init__(self, addr, requestHandler, bind_and_activate)
# [Bug #1222790] If possible, set close-on-exec flag; if a
# method spawns a subprocess, the subprocess shouldn't have
# the listening socket open.
if fcntl is not None and hasattr(fcntl, 'FD_CLOEXEC'):
flags = fcntl.fcntl(self.fileno(), fcntl.F_GETFD)
flags |= fcntl.FD_CLOEXEC
fcntl.fcntl(self.fileno(), fcntl.F_SETFD, flags)
示例9: set_close_exec
# 需要導入模塊: import fcntl [as 別名]
# 或者: from fcntl import F_SETFD [as 別名]
def set_close_exec(fd):
flags = fcntl.fcntl(fd, fcntl.F_GETFD)
fcntl.fcntl(fd, fcntl.F_SETFD, flags | fcntl.FD_CLOEXEC)
示例10: set_noinherit
# 需要導入模塊: import fcntl [as 別名]
# 或者: from fcntl import F_SETFD [as 別名]
def set_noinherit(sock: socket.socket) -> None:
"""Mark the given socket fd as non-inheritable to child processes"""
fd = sock.fileno()
flags = fcntl.fcntl(fd, fcntl.F_GETFD)
fcntl.fcntl(fd, fcntl.F_SETFD, flags | fcntl.FD_CLOEXEC)
示例11: close_on_exec
# 需要導入模塊: import fcntl [as 別名]
# 或者: from fcntl import F_SETFD [as 別名]
def close_on_exec(fd):
flags = fcntl.fcntl(fd, fcntl.F_GETFD)
flags |= fcntl.FD_CLOEXEC
fcntl.fcntl(fd, fcntl.F_SETFD, flags)
示例12: write_pid_file
# 需要導入模塊: import fcntl [as 別名]
# 或者: from fcntl import F_SETFD [as 別名]
def write_pid_file(pid_file, pid):
import fcntl
import stat
try:
fd = os.open(pid_file, os.O_RDWR | os.O_CREAT,
stat.S_IRUSR | stat.S_IWUSR)
except OSError as e:
shell.print_exception(e)
return -1
flags = fcntl.fcntl(fd, fcntl.F_GETFD)
assert flags != -1
flags |= fcntl.FD_CLOEXEC
r = fcntl.fcntl(fd, fcntl.F_SETFD, flags)
assert r != -1
# There is no platform independent way to implement fcntl(fd, F_SETLK, &fl)
# via fcntl.fcntl. So use lockf instead
try:
fcntl.lockf(fd, fcntl.LOCK_EX | fcntl.LOCK_NB, 0, 0, os.SEEK_SET)
except IOError:
r = os.read(fd, 32)
if r:
logging.error('already started at pid %s' % common.to_str(r))
else:
logging.error('already started')
os.close(fd)
return -1
os.ftruncate(fd, 0)
os.write(fd, common.to_bytes(str(pid)))
return 0
示例13: _set_cloexec_flag
# 需要導入模塊: import fcntl [as 別名]
# 或者: from fcntl import F_SETFD [as 別名]
def _set_cloexec_flag(self, fd):
try:
cloexec_flag = fcntl.FD_CLOEXEC
except AttributeError:
cloexec_flag = 1
old = fcntl.fcntl(fd, fcntl.F_GETFD)
fcntl.fcntl(fd, fcntl.F_SETFD, old | cloexec_flag)
示例14: _set_cloexec
# 需要導入模塊: import fcntl [as 別名]
# 或者: from fcntl import F_SETFD [as 別名]
def _set_cloexec(fd):
try:
flags = _fcntl.fcntl(fd, _fcntl.F_GETFD, 0)
except IOError:
pass
else:
# flags read successfully, modify
flags |= _fcntl.FD_CLOEXEC
_fcntl.fcntl(fd, _fcntl.F_SETFD, flags)
示例15: __init__
# 需要導入模塊: import fcntl [as 別名]
# 或者: from fcntl import F_SETFD [as 別名]
def __init__(self, addr, requestHandler=SimpleXMLRPCRequestHandler,
logRequests=True, allow_none=False, encoding=None, bind_and_activate=True):
self.logRequests = logRequests
SimpleXMLRPCDispatcher.__init__(self, allow_none, encoding)
SocketServer.TCPServer.__init__(self, addr, requestHandler, bind_and_activate)
# [Bug #1222790] If possible, set close-on-exec flag; if a
# method spawns a subprocess, the subprocess shouldn't have
# the listening socket open.
if fcntl is not None and hasattr(fcntl, 'FD_CLOEXEC'):
flags = fcntl.fcntl(self.fileno(), fcntl.F_GETFD)
flags |= fcntl.FD_CLOEXEC
fcntl.fcntl(self.fileno(), fcntl.F_SETFD, flags)