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"""This test checks for correct fork() behavior.
"""
import os
import time
from test.fork_wait import ForkWait
from test.support import run_unittest, reap_children, get_attribute
# Skip test if fork does not exist.
get_attribute(os, 'fork')
class ForkTest(ForkWait):
def wait_impl(self, cpid):
for i in range(10):
# waitpid() shouldn't hang, but some of the buildbots seem to hang
# in the forking tests. This is an attempt to fix the problem.
spid, status = os.waitpid(cpid, os.WNOHANG)
if spid == cpid:
break
time.sleep(1.0)
self.assertEqual(spid, cpid)
self.assertEqual(status, 0, "cause = %d, exit = %d" % (status&0xff, status>>8))
def test_main():
run_unittest(ForkTest)
reap_children()
if __name__ == "__main__":
test_main()
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