Add a test that verifies pipe ownership (uid/gid) is preserved across
checkpoint/restore. This test exercises the fix for issue #2984 where
accessing pipes via /proc/self/fd/ failed after restore because the
pipe ownership was changed to root.
The test:
- Creates a pipe and optionally changes ownership (if running as root)
- Records ownership before C/R
- Verifies ownership is preserved after restore
- Tests /proc/self/fd access works after restore
Signed-off-by: Ahmed Elaidy <elaidya225@gmail.com>
b19f73467e