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Commit 2bf1cbf1 authored by Dave Jones's avatar Dave Jones Committed by Linus Torvalds
Browse files

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: default avatarDave Jones <davej@redhat.com>
Acked-by: default avatarCyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 5a55f8bb

tools/testing/selftests/kcmp/kcmp_test.c

+4 −2
Original line number Diff line number Diff line
@@ -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");