def spawnve(mode, file, args, env):
spawn_lock.acquire()
try:
if mode == os.P_WAIT:
ret = os.spawnve(os.P_NOWAIT, file, args, env)
else:
ret = os.spawnve(mode, file, args, env)
finally:
spawn_lock.release()
if mode == os.P_WAIT:
pid, status = os.waitpid(ret, 0)
ret = status >> 8
return ret
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