diff mbox series

[v3,13/16] selftests/pidfd: add fourth PIDFD_INFO_EXIT selftest

Message ID 20250305-work-pidfs-kill_on_last_close-v3-13-c8c3d8361705@kernel.org (mailing list archive)
State New
Headers show
Series pidfs: provide information after task has been reaped | expand

Commit Message

Christian Brauner March 5, 2025, 10:08 a.m. UTC 
Add a selftest for PIDFD_INFO_EXIT behavior.

Link: https://lore.kernel.org/r/20250304-work-pidfs-kill_on_last_close-v2-13-44fdacfaa7b7@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 tools/testing/selftests/pidfd/pidfd_info_test.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
diff mbox series

Patch

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