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#!/usr/bin/env python
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from __future__ import absolute_import
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import errno
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import os
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import signal
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import sys
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import time
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if os.name =='nt':
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import ctypes
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_BOOL = ctypes.c_long
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_DWORD = ctypes.c_ulong
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_UINT = ctypes.c_uint
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_HANDLE = ctypes.c_void_p
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ctypes.windll.kernel32.CloseHandle.argtypes = [_HANDLE]
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ctypes.windll.kernel32.CloseHandle.restype = _BOOL
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ctypes.windll.kernel32.GetLastError.argtypes = []
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ctypes.windll.kernel32.GetLastError.restype = _DWORD
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ctypes.windll.kernel32.OpenProcess.argtypes = [_DWORD, _BOOL, _DWORD]
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ctypes.windll.kernel32.OpenProcess.restype = _HANDLE
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ctypes.windll.kernel32.TerminateProcess.argtypes = [_HANDLE, _UINT]
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ctypes.windll.kernel32.TerminateProcess.restype = _BOOL
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ctypes.windll.kernel32.WaitForSingleObject.argtypes = [_HANDLE, _DWORD]
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ctypes.windll.kernel32.WaitForSingleObject.restype = _DWORD
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def _check(ret, expectederr=None):
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if ret == 0:
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winerrno = ctypes.GetLastError()
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if winerrno == expectederr:
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return True
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raise ctypes.WinError(winerrno)
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def kill(pid, logfn, tryhard=True):
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logfn('# Killing daemon process %d' % pid)
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PROCESS_TERMINATE = 1
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PROCESS_QUERY_INFORMATION = 0x400
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SYNCHRONIZE = 0x00100000
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WAIT_OBJECT_0 = 0
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WAIT_TIMEOUT = 258
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handle = ctypes.windll.kernel32.OpenProcess(
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PROCESS_TERMINATE|SYNCHRONIZE|PROCESS_QUERY_INFORMATION,
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False, pid)
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if handle is None:
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_check(0, 87) # err 87 when process not found
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return # process not found, already finished
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try:
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r = ctypes.windll.kernel32.WaitForSingleObject(handle, 100)
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if r == WAIT_OBJECT_0:
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pass # terminated, but process handle still available
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elif r == WAIT_TIMEOUT:
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_check(ctypes.windll.kernel32.TerminateProcess(handle, -1))
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else:
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_check(r)
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# TODO?: forcefully kill when timeout
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# and ?shorter waiting time? when tryhard==True
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r = ctypes.windll.kernel32.WaitForSingleObject(handle, 100)
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# timeout = 100 ms
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if r == WAIT_OBJECT_0:
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pass # process is terminated
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elif r == WAIT_TIMEOUT:
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logfn('# Daemon process %d is stuck')
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else:
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_check(r) # any error
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except: #re-raises
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ctypes.windll.kernel32.CloseHandle(handle) # no _check, keep error
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raise
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_check(ctypes.windll.kernel32.CloseHandle(handle))
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else:
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def kill(pid, logfn, tryhard=True):
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try:
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os.kill(pid, 0)
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logfn('# Killing daemon process %d' % pid)
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os.kill(pid, signal.SIGTERM)
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if tryhard:
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for i in range(10):
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time.sleep(0.05)
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os.kill(pid, 0)
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else:
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time.sleep(0.1)
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os.kill(pid, 0)
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logfn('# Daemon process %d is stuck - really killing it' % pid)
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os.kill(pid, signal.SIGKILL)
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except OSError as err:
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if err.errno != errno.ESRCH:
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raise
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def killdaemons(pidfile, tryhard=True, remove=False, logfn=None):
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if not logfn:
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logfn = lambda s: s
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# Kill off any leftover daemon processes
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try:
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pids = []
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with open(pidfile) as fp:
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for line in fp:
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try:
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pid = int(line)
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if pid <= 0:
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raise ValueError
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except ValueError:
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logfn('# Not killing daemon process %s - invalid pid'
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% line.rstrip())
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continue
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pids.append(pid)
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for pid in pids:
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kill(pid, logfn, tryhard)
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if remove:
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os.unlink(pidfile)
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except IOError:
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pass
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if __name__ == '__main__':
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if len(sys.argv) > 1:
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path, = sys.argv[1:]
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else:
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path = os.environ["DAEMON_PIDS"]
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killdaemons(path)
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