Add a selftest for PIDFD_INFO_EXIT behavior. Link: https://lore.kernel.org/r/20250304-work-pidfs-kill_on_last_close-v2-13-44fdacfaa7b7@xxxxxxxxxx Signed-off-by: Christian Brauner <brauner@xxxxxxxxxx> --- tools/testing/selftests/pidfd/pidfd_info_test.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/tools/testing/selftests/pidfd/pidfd_info_test.c b/tools/testing/selftests/pidfd/pidfd_info_test.c index 2917e7a03b31..0d0af4c2a84d 100644 --- a/tools/testing/selftests/pidfd/pidfd_info_test.c +++ b/tools/testing/selftests/pidfd/pidfd_info_test.c @@ -177,4 +177,22 @@ TEST_F(pidfd_info, success_exit) ASSERT_FALSE(!!(info.mask & PIDFD_INFO_EXIT)); } +TEST_F(pidfd_info, success_reaped) +{ + struct pidfd_info info = { + .mask = PIDFD_INFO_CGROUPID, + }; + + /* Process has already been reaped and PIDFD_INFO_EXIT hasn't been set. */ + ASSERT_NE(ioctl(self->child_pidfd4, PIDFD_GET_INFO, &info), 0); + ASSERT_EQ(errno, ESRCH); + + info.mask = PIDFD_INFO_CGROUPID | PIDFD_INFO_EXIT; + ASSERT_EQ(ioctl(self->child_pidfd4, PIDFD_GET_INFO, &info), 0); + ASSERT_FALSE(!!(info.mask & PIDFD_INFO_CREDS)); + ASSERT_TRUE(!!(info.mask & PIDFD_INFO_EXIT)); + ASSERT_TRUE(WIFEXITED(info.exit_code)); + ASSERT_EQ(WEXITSTATUS(info.exit_code), 0); +} + TEST_HARNESS_MAIN -- 2.47.2
