t_truncate_self: describe self better in error message

Include the name of the program that is trying to trucate itself
to error messages to distinguish between output for different
test cases (e.g. test_lower and test_upper in overlay/013).

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/src/t_truncate_self.c b/src/t_truncate_self.c
index d14dec397e..3f1c8e6fde 100644
--- a/src/t_truncate_self.c
+++ b/src/t_truncate_self.c
@@ -1,18 +1,21 @@
 #include <stdio.h>
 #include <errno.h>
 #include <unistd.h>
+#include <libgen.h>
 
 int main(int argc, char *argv[])
 {
+	const char *progname = basename(argv[0]);
 	int ret;
 
 	ret = truncate(argv[0], 4096);
 	if (ret != -1) {
-		fprintf(stderr, "truncate(argv[0]) should have failed\n");
+		fprintf(stderr, "truncate(%s) should have failed\n",
+			progname);
 		return 1;
 	}
 	if (errno != ETXTBSY) {
-		perror("truncate(argv[0])");
+		perror(progname);
 		return 1;
 	}