tools: bpftool: fix return value when all eBPF programs have been shown
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>
diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c
index aa6d72e..ede7957 100644
--- a/tools/bpf/bpftool/prog.c
+++ b/tools/bpf/bpftool/prog.c
@@ -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");