From: Dmitry V. Levin <ldv@altlinux.org>
Date: Tue, 20 Dec 2016 02:27:22 +0000 (+0000)
Subject: tests: fix potential errno clobbering in membarrier test
X-Git-Tag: v4.16~318
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=c298e50d2aa4a93070bdff75332b63d60036e757;p=strace

tests: fix potential errno clobbering in membarrier test

* tests/membarrier.c (main): Save errno.
---

diff --git a/tests/membarrier.c b/tests/membarrier.c
index adf24efd..cde8f329 100644
--- a/tests/membarrier.c
+++ b/tests/membarrier.c
@@ -39,9 +39,10 @@ int
 main(void)
 {
 	assert(syscall(__NR_membarrier, 3, 255) == -1);
-	printf("membarrier(0x3 /* MEMBARRIER_CMD_??? */, 255) = -1 %s (%m)\n",
-	       errno2name());
-	if (errno != ENOSYS) {
+	int saved_errno = errno;
+	printf("membarrier(0x3 /* MEMBARRIER_CMD_??? */, 255) = %s\n",
+	       sprintrc(-1));
+	if (saved_errno != ENOSYS) {
 		/* the test needs to be updated? */
 		assert(syscall(__NR_membarrier, 0, 0) == 1);
 		puts("membarrier(MEMBARRIER_CMD_QUERY, 0)"