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# 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().'
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