[3.7] bpo-35189: Retry fnctl calls on EINTR (GH-10413) (GH-10678) (GH-10685)

* bpo-35189: Fix eintr_tester.py (GH-10637)

Call setitimer() before each test method, instead of once per test
case, to ensure that signals are sent in each test method.
Previously, only the first method of a testcase class got signals.

Changes:

* Replace setUpClass() with setUp() and replace tearDownClass() with
  tearDown().
* tearDown() now ensures that at least one signal has been sent.
* Replace support.run_unittest() with unittest.main() which has
  a nicer CLI and automatically discover test cases.

(cherry picked from commit aac1f81eef971876ba5b1673db9ce6620311c469)

* bpo-35189: Retry fnctl calls on EINTR (GH-10413)

Modify the following fnctl function to retry if interrupted by a signal
(EINTR): flock, lockf, fnctl.

(cherry picked from commit b409ffa848b280c1db1b4f450bfae14f263099ac)
Co-Authored-By: nierob <nierob@users.noreply.github.com>
(cherry picked from commit 56742f1eb05401a27499af0ccdcb4e4214859fd1)

0 files changed, 0 insertions, 0 deletions