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selftests/pidfd: add fourth PIDFD_INFO_EXIT selftest

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Add a selftest for PIDFD_INFO_EXIT behavior.

Link: https://lore.kernel.org/r/20250305-work-pidfs-kill_on_last_close-v3-13-c8c3d8361705@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner
2025-03-05 11:08:23 +01:00
parent a79975f05e
commit 2e94e4c649
1 changed files with 18 additions and 0 deletions
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18
tools/testing/selftests/pidfd/pidfd_info_test.c
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@@ -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