netdev - [PATCH net-next 5/8] tools: bpftool: print only one error message on byte parsing failure

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Message-Id: <20171019224626.31608-6-jakub.kicinski@netronome.com>
Date:   Thu, 19 Oct 2017 15:46:23 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     netdev@...r.kernel.org
Cc:     oss-drivers@...ronome.com,
        Quentin Monnet <quentin.monnet@...ronome.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCH net-next 5/8] tools: bpftool: print only one error message on byte parsing failure

From: Quentin Monnet <quentin.monnet@...ronome.com>

Make error messages more consistent. Specifically, when bpftool fails at
parsing map key bytes, make it print a single error message to stderr
and return from the function, instead of (always) printing a second
error message afterwards.

Signed-off-by: Quentin Monnet <quentin.monnet@...ronome.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
---
 tools/bpf/bpftool/map.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c
index b1dad76215ed..e1004d825392 100644
--- a/tools/bpf/bpftool/map.c
+++ b/tools/bpf/bpftool/map.c
@@ -252,7 +252,7 @@ static char **parse_bytes(char **argv, const char *name, unsigned char *val,
 		val[i] = strtoul(argv[i], &endptr, 0);
 		if (*endptr) {
 			err("error parsing byte: %s\n", argv[i]);
-			break;
+			return NULL;
 		}
 		i++;
 	}
-- 
2.14.1