From d17aedda384cfe6940b9948f4db36643495e0375 Mon Sep 17 00:00:00 2001
From: "fu.lin" <fulin10@huawei.com>
Date: Tue, 15 Feb 2022 11:31:27 +0800
Subject: [PATCH 65/72] zdtm: print errno info when accessing *.out failure

The line `Output file *.out appears to exist, aborting` is confusing.
The one common reason is permission denied because of the test desc
is lack of suid flag. The zdtm.py will set `ZDTM_UID` and `ZDTM_GID`,
the function `test_init()` (in `zdtm/lib/test.c`) will change tester
itself to that uid and gid if no suid flag.

Here print the errno when access *.out failed.

Signed-off-by: fu.lin <fulin10@huawei.com>
---
 test/zdtm/lib/test.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/test/zdtm/lib/test.c b/test/zdtm/lib/test.c
index 81da81e..471980d 100644
--- a/test/zdtm/lib/test.c
+++ b/test/zdtm/lib/test.c
@@ -74,7 +74,8 @@ static void test_fini(void)
 static void setup_outfile(void)
 {
 	if (!access(outfile, F_OK) || errno != ENOENT) {
-		fprintf(stderr, "Output file %s appears to exist, aborting\n", outfile);
+		fprintf(stderr, "Output file %s appears to exist, aborting: %s\n",
+			outfile, strerror(errno));
 		exit(1);
 	}
 
-- 
2.34.1