From 2bf1cbf1c616b4dd85a3a8a715af9c5701c16a91 Mon Sep 17 00:00:00 2001 From: Dave Jones Date: Mon, 17 Dec 2012 16:04:52 -0800 Subject: [PATCH] tools/testing/selftests/kcmp/kcmp_test.c: print reason for failure in kcmp_test I was curious why sys_kcmp wasn't working, which led me to the testcase. It turned out I hadn't enabled CHECKPOINT_RESTORE in the kernel I was testing. Add a decoding of errno to the testcase to make that obvious. Signed-off-by: Dave Jones Acked-by: Cyrill Gorcunov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- tools/testing/selftests/kcmp/kcmp_test.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c index 358cc6bfa35d..fa4f1b37e045 100644 --- a/tools/testing/selftests/kcmp/kcmp_test.c +++ b/tools/testing/selftests/kcmp/kcmp_test.c @@ -72,7 +72,8 @@ int main(int argc, char **argv) /* This one should return same fd */ ret = sys_kcmp(pid1, pid2, KCMP_FILE, fd1, fd1); if (ret) { - printf("FAIL: 0 expected but %d returned\n", ret); + printf("FAIL: 0 expected but %d returned (%s)\n", + ret, strerror(errno)); ret = -1; } else printf("PASS: 0 returned as expected\n"); @@ -80,7 +81,8 @@ int main(int argc, char **argv) /* Compare with self */ ret = sys_kcmp(pid1, pid1, KCMP_VM, 0, 0); if (ret) { - printf("FAIL: 0 expected but %li returned\n", ret); + printf("FAIL: 0 expected but %li returned (%s)\n", + ret, strerror(errno)); ret = -1; } else printf("PASS: 0 returned as expected\n");