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