def testPopenCloseFds(self):
r, w = filedes.pipe()
try:
# Create a subprocess that prints and blocks waiting for input
p = Popen("echo ok; read foo", shell=True,
stdin=PIPE, stdout=PIPE, stderr=STDOUT,
close_fds=True)
try:
# Wait for the process to let us know it's alive
ready = p.stdout.read(3)
self.assertEquals(ready, "ok\n")
# Get the list of FDs of the remote process
remote_fds = get_open_fds(p.pid)
# Make sure the read fd persisted, but the write fd was not.
self.assertNotIn(r, remote_fds)
self.assertNotIn(w, remote_fds)
# Now send some output to the remote process to unblock it
p.stdin.write("ok\n")
p.stdin.flush()
# Wait for it to shutdown
self.assertEquals(p.wait(), 0)
finally:
# Popen does not close PIPE fds on process shutdown
# automatically, even if there's no data in it. Since the
# exception context is propagated to the test cases' tearDown,
# the popen's pipes will show up as a leak
del p
finally:
r.close()
w.close()
def checkSubprocessFDs(self, check_fds, close=True):
try:
# Create a subprocess that prints and blocks waiting for input
p = Popen("echo ok; read foo",
shell=True,
stdin=PIPE,
stdout=PIPE,
stderr=STDOUT)
try:
# Wait for the process to let us know it's alive
ready = p.stdout.read(3)
self.assertEquals(ready, "ok\n")
# Get the list of FDs of the remote process
remote_fds = get_open_fds(p.pid)
# Make sure the check_fds persisted and have an identical mode
for fd in check_fds:
self.assertIn(fd, remote_fds)
self.assertEquals(FD(int(fd), p.pid).mode, fd.mode)
# Now send some output to the remote process to unblock it
p.stdin.write("ok\n")
p.stdin.flush()
# Wait for it to shutdown
self.assertEquals(p.wait(), 0)
finally:
# Popen does not close PIPE fds on process shutdown
# automatically, even if there's no data in it. Since the
# exception context is propagated to the test cases' tearDown,
# the popen's pipes will show up as a leak
if p.poll() is None:
p.kill()
self.assertEquals(p.wait(), -9)
del p
finally:
if close:
for fd in check_fds:
fd.close()
def checkSubprocessFDs(self, check_fds, close=True):
try:
# Create a subprocess that prints and blocks waiting for input
p = Popen("echo ok; read foo", shell=True,
stdin=PIPE, stdout=PIPE, stderr=STDOUT)
try:
# Wait for the process to let us know it's alive
ready = p.stdout.read(3)
self.assertEquals(ready, "ok\n")
# Get the list of FDs of the remote process
remote_fds = get_open_fds(p.pid)
# Make sure the check_fds persisted and have an identical mode
for fd in check_fds:
self.assertIn(fd, remote_fds)
self.assertEquals(FD(int(fd), p.pid).mode, fd.mode)
# Now send some output to the remote process to unblock it
p.stdin.write("ok\n")
p.stdin.flush()
# Wait for it to shutdown
self.assertEquals(p.wait(), 0)
finally:
# Popen does not close PIPE fds on process shutdown
# automatically, even if there's no data in it. Since the
# exception context is propagated to the test cases' tearDown,
# the popen's pipes will show up as a leak
if p.poll() is None:
p.kill()
self.assertEquals(p.wait(), -9)
del p
finally:
if close:
for fd in check_fds:
fd.close()
