zdtm: Print /proc/locks in lock tests to investigate random failures

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm/live/static/file_locks01.c

@@ -85,7 +85,11 @@ static int check_file_locks()
 	if (!fp_locks)
 		return -1;
 
+	test_msg("C: %d/%d/%d\n", inodes[0], inodes[1], inodes[2]);
+
 	while (fgets(buf, sizeof(buf), fp_locks)) {
+		test_msg("c: %s", buf);
+
 		if (strstr(buf, "->"))
 			continue;
 

test/zdtm/live/static/file_locks02.c

@@ -27,7 +27,11 @@ static int check_file_locks()
 	if (!fp_locks)
 		return -1;
 
+	test_msg("C: %d\n", pid);
+
 	while (fgets(buf, sizeof(buf), fp_locks)) {
+		test_msg("c: %s", buf);
+
 		if (strstr(buf, "->"))
 			continue;
 

test/zdtm/live/static/file_locks03.c

@@ -27,7 +27,11 @@ static int check_file_locks(int alt_pid)
 	if (!fp_locks)
 		return -1;
 
+	test_msg("C: %d/%d\n", pid, alt_pid);
+
 	while (fgets(buf, sizeof(buf), fp_locks)) {
+		test_msg("c: %s", buf);
+
 		if (strstr(buf, "->"))
 			continue;
 

test/zdtm/live/static/file_locks04.c

@@ -27,7 +27,11 @@ static int check_file_locks(int alt_pid, int fd)
 	if (!fp_locks)
 		return -1;
 
+	test_msg("C: %d/%d\n", pid, alt_pid);
+
 	while (fgets(buf, sizeof(buf), fp_locks)) {
+		test_msg("c: %s", buf);
+
 		if (strstr(buf, "->"))
 			continue;
 

test/zdtm/live/static/file_locks05.c

@@ -42,7 +42,7 @@ int main(int argc, char **argv)
 	if (flock(fd2, LOCK_SH) == 0)
 		pass();
 	else
-		fail("Flock file locks check failed");
+		fail("Flock file locks check failed (%d)", errno);
 
 	close(fd);
 	close(fd2);