def test_exit(self):
try:
import posix, _rawffi
except ImportError:
skip("requires posix.fork() to test")
#
pid = posix.fork()
if pid == 0:
_rawffi.exit(5) # in the child
pid, status = posix.waitpid(pid, 0)
assert posix.WIFEXITED(status)
assert posix.WEXITSTATUS(status) == 5
def Wait(self):
# This is a list of async jobs
while True:
try:
pid, status = posix.wait()
except OSError as e:
#log('wait() error: %s', e)
if e.errno == errno.ECHILD:
return False # nothing to wait for caller should stop
elif e.errno == errno.EINTR:
# This happens when we register a handler for SIGINT, and thus never
# get the KeyboardInterrupt exception? Not sure why.
# Try
# $ cat # Now hit Ctrl-C
#log('Continuing')
continue # try again
else:
# An error we don't know about.
raise
else:
break # no exception thrown, so no need to retry
#log('WAIT got %s %s', pid, status)
# TODO: change status in more cases.
if posix.WIFSIGNALED(status):
if posix.WTERMSIG(status) == signal.SIGINT:
print()
elif posix.WIFEXITED(status):
status = posix.WEXITSTATUS(status)
#log('exit status: %s', status)
# This could happen via coding error. But this may legitimately happen
# if a grandchild outlives the child (its parent). Then it is reparented
# under this process, so we might receive notification of its exit, even
# though we didn't start it. We can't have any knowledge of such
# processes, so print a warning.
if pid not in self.callbacks:
util.warn("PID %d stopped, but osh didn't start it", pid)
return True # caller should keep waiting
callback = self.callbacks.pop(pid)
callback(pid, status)
self.last_status = status # for wait -n
return True # caller should keep waiting