[LTP] [PATCH] syscalls/rt_sigsuspend01: ignore reserved signals

[Steve Muckle]

Some signals may be internally used by the C library. Do not attempt to
verify these.

Signed-off-by: Steve Muckle <smuckle@google.com>
---
 .../kernel/syscalls/rt_sigsuspend/rt_sigsuspend01.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/testcases/kernel/syscalls/rt_sigsuspend/rt_sigsuspend01.c b/testcases/kernel/syscalls/rt_sigsuspend/rt_sigsuspend01.c
index 14b6bb332..f17a9aae6 100644
--- a/testcases/kernel/syscalls/rt_sigsuspend/rt_sigsuspend01.c
+++ b/testcases/kernel/syscalls/rt_sigsuspend/rt_sigsuspend01.c
@@ -26,6 +26,7 @@ static void sig_handler(int sig)
 
 static void verify_rt_sigsuspend(void)
 {
+	int i;
 	sigset_t set, set1, set2;
 	struct sigaction act = {.sa_handler = sig_handler};
 
@@ -51,11 +52,13 @@ static void verify_rt_sigsuspend(void)
 	tst_res(TPASS, "rt_sigsuspend() returned with -1 and EINTR");
 
 	SAFE_RT_SIGPROCMASK(0, NULL, &set2, SIGSETSIZE);
-
-	if (memcmp(&set1, &set2, sizeof(unsigned long)))
-		tst_res(TFAIL, "signal mask not preserved");
-	else
-		tst_res(TPASS, "signal mask preserved");
+	for (i = 1; i < SIGRTMAX; i++) {
+		if (i >= __SIGRTMIN && i < SIGRTMIN)
+			continue;
+		if (sigismember(&set1, i) != sigismember(&set2, i))
+			tst_brk(TFAIL, "signal mask not preserved");
+	}
+	tst_res(TPASS, "signal mask preserved");
 }
 
 static struct tst_test test = {
-- 
2.19.1.1215.g8438c0b245-goog