You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
56 lines
1.4 KiB
56 lines
1.4 KiB
# Test select.poll in combination with file descriptors.
|
|
|
|
try:
|
|
import select, errno
|
|
|
|
select.poll # Raises AttributeError for CPython implementations without poll()
|
|
except (ImportError, AttributeError):
|
|
print("SKIP")
|
|
raise SystemExit
|
|
|
|
# Check that poll supports registering file descriptors (integers).
|
|
try:
|
|
select.poll().register(0)
|
|
except OSError:
|
|
print("SKIP")
|
|
raise SystemExit
|
|
|
|
# Register invalid file descriptor.
|
|
try:
|
|
select.poll().register(-1)
|
|
except ValueError:
|
|
print("ValueError")
|
|
|
|
# Test polling stdout, it should be writable.
|
|
poller = select.poll()
|
|
poller.register(1)
|
|
poller.modify(1, select.POLLOUT)
|
|
print(poller.poll())
|
|
|
|
# Unregister then re-register.
|
|
poller.unregister(1)
|
|
poller.register(1, select.POLLIN)
|
|
|
|
# Poll for input, should return an empty list.
|
|
print(poller.poll(0))
|
|
|
|
# Test registering a very large number of file descriptors (will trigger
|
|
# EINVAL due to more than OPEN_MAX fds). Typically it's 1024 (and on GitHub CI
|
|
# we force this via `ulimit -n 1024`).
|
|
poller = select.poll()
|
|
for fd in range(6000):
|
|
poller.register(fd)
|
|
try:
|
|
poller.poll()
|
|
assert False
|
|
except OSError as er:
|
|
print(er.errno == errno.EINVAL)
|
|
|
|
# Register stdout/stderr, plus many extra ones to trigger the fd vector
|
|
# resizing. Then unregister the excess ones and verify poll still works.
|
|
poller = select.poll()
|
|
for fd in range(1, 1000):
|
|
poller.register(fd)
|
|
for i in range(3, 1000):
|
|
poller.unregister(i)
|
|
print(sorted(poller.poll()))
|
|
|