[PATCH] selftests/seccomp: report errno and add hints on failure

[Sameeksha Sankpal]

Signed-off-by: Sameeksha Sankpal <sameekshasank...@gmail.com>
---
 tools/testing/selftests/seccomp/seccomp_bpf.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c 
b/tools/testing/selftests/seccomp/seccomp_bpf.c
index 14ba51b52095..d6a85d7b26da 100644
--- a/tools/testing/selftests/seccomp/seccomp_bpf.c
+++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
@@ -4508,7 +4508,11 @@ static char get_proc_stat(struct __test_metadata 
*_metadata, pid_t pid)
 
        snprintf(proc_path, sizeof(proc_path), "/proc/%d/stat", pid);
        ASSERT_EQ(get_nth(_metadata, proc_path, 3, &line), 1);
-
+       int rc = get_nth(_metadata, proc_path, 3, &line);
+       if (rc != 1) {
+               printf("[ERROR] user_notification_fifo: failed to read stat for 
PID %d (rc=%d)\n", pid, rc);
+       }
+       ASSERT_EQ(rc, 1);
        status = *line;
        free(line);
 
@@ -4518,6 +4522,7 @@ static char get_proc_stat(struct __test_metadata 
*_metadata, pid_t pid)
 TEST(user_notification_fifo)
 {
        struct seccomp_notif_resp resp = {};
+       ksft_print_msg("[INFO] Starting FIFO notification test\n");
        struct seccomp_notif req = {};
        int i, status, listener;
        pid_t pid, pids[3];
@@ -4535,6 +4540,7 @@ TEST(user_notification_fifo)
        listener = user_notif_syscall(__NR_getppid,
                                      SECCOMP_FILTER_FLAG_NEW_LISTENER);
        ASSERT_GE(listener, 0);
+       ksft_print_msg("[INFO] user_notification_fifo: listener PID is %d\n", 
listener);
 
        pid = fork();
        ASSERT_GE(pid, 0);
-- 
2.43.0