mirror of
https://github.com/python/cpython.git
synced 2024-12-14 04:17:19 +08:00
59 lines
1.6 KiB
Python
59 lines
1.6 KiB
Python
# spawn - This is ugly, OS-specific code to spawn a separate process. It
|
|
# also defines a function for getting the version of a path most
|
|
# likely to work with cranky API functions.
|
|
|
|
import os
|
|
|
|
def hardpath(path):
|
|
path = os.path.normcase(os.path.abspath(path))
|
|
try:
|
|
import win32api
|
|
path = win32api.GetShortPathName( path )
|
|
except:
|
|
pass
|
|
return path
|
|
|
|
if hasattr(os, 'fork'):
|
|
|
|
# UNIX-ish operating system: we fork() and exec(), and we have to track
|
|
# the pids of our children and call waitpid() on them to avoid leaving
|
|
# zombies in the process table. kill_zombies() does the dirty work, and
|
|
# should be called periodically.
|
|
|
|
zombies = []
|
|
|
|
def spawn(bin, *args):
|
|
pid = os.fork()
|
|
if pid:
|
|
zombies.append(pid)
|
|
else:
|
|
os.execv( bin, (bin, ) + args )
|
|
|
|
def kill_zombies():
|
|
for z in zombies[:]:
|
|
stat = os.waitpid(z, os.WNOHANG)
|
|
if stat[0]==z:
|
|
zombies.remove(z)
|
|
elif hasattr(os, 'spawnv'):
|
|
|
|
# Windows-ish OS: we use spawnv(), and stick quotes around arguments
|
|
# in case they contains spaces, since Windows will jam all the
|
|
# arguments to spawn() or exec() together into one string. The
|
|
# kill_zombies function is a noop.
|
|
|
|
def spawn(bin, *args):
|
|
nargs = [bin]
|
|
for arg in args:
|
|
nargs.append( '"'+arg+'"' )
|
|
os.spawnv( os.P_NOWAIT, bin, nargs )
|
|
|
|
def kill_zombies(): pass
|
|
|
|
else:
|
|
# If you get here, you may be able to write an alternative implementation
|
|
# of these functions for your OS.
|
|
|
|
def kill_zombies(): pass
|
|
|
|
raise OSError, 'This OS does not support fork() or spawnv().'
|