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tools: bpftool: fix return value when all eBPF programs have been shown

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Change the program to have a more consistent return code. Specifically,
do not make bpftool return an error code simply because it reaches the
end of the list of the eBPF programs to show.

Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Quentin Monnet 2017-10-19 15:46:20 -07:00 • committed by David S. Miller
parent 9cbe1f581d
commit 1739c26da7
1 changed files with 3 additions and 1 deletions
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4
tools/bpf/bpftool/prog.c
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@ -275,8 +275,10 @@ static int do_show(int argc, char **argv)
while (true) {
err = bpf_prog_get_next_id(id, &id);
if (err) {
if (errno == ENOENT)
if (errno == ENOENT) {
err = 0;
break;
}
err("can't get next program: %s\n", strerror(errno));
if (errno == EINVAL)
err("kernel too old?\n");