tools: bpftool: preserve JSON output on errors on batch file parsing

Before this patch, perror() function is used in some cases when bpftool
fails to parse its input file in batch mode. This function does not
integrate well with the rest of the output when JSON is used, so we
replace it by something that is compliant.

Most calls to perror() had already been replaced in a previous patch,
this one is a leftover.

Fixes: d319c8e101c5 ("tools: bpftool: preserve JSON output on errors on batch file parsing")
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

diff --git a/tools/bpf/bpftool/main.c b/tools/bpf/bpftool/main.c
index 3a0396d87c424954ffe3e6c1111dca2a23bd3776..185acfa229b592f0bf0b62d972e90c3746959283 100644 (file)
--- a/tools/bpf/bpftool/main.c
+++ b/tools/bpf/bpftool/main.c
@@ -244,7 +244,7 @@ static int do_batch(int argc, char **argv)
        }
 
        if (errno && errno != ENOENT) {
-               perror("reading batch file failed");
+               p_err("reading batch file failed: %s", strerror(errno));
                err = -1;
        } else {
                p_info("processed %d lines", lines);