linux-kernel - [PATCH v2] bpf: bpftool: Setting error code in do

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Message-Id: <20250311031238.14865-1-swnam0729@gmail.com>
Date: Tue, 11 Mar 2025 12:12:37 +0900
From: Sewon Nam <swnam0729@...il.com>
To: Quentin Monnet <qmo@...nel.org>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Andrii Nakryiko <andrii@...nel.org>,
	Martin KaFai Lau <martin.lau@...ux.dev>,
	Eduard Zingerman <eddyz87@...il.com>,
	Song Liu <song@...nel.org>,
	Yonghong Song <yonghong.song@...ux.dev>,
	John Fastabend <john.fastabend@...il.com>,
	KP Singh <kpsingh@...nel.org>,
	Stanislav Fomichev <sdf@...ichev.me>,
	Hao Luo <haoluo@...gle.com>,
	Jiri Olsa <jolsa@...nel.org>
Cc: Sewon Nam <swnam0729@...il.com>,
	bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] bpf: bpftool: Setting error code in do_loader()

missing error code in do_loader()
bpf_object__open_file() failed, but return 0
This means the command's exit status code was successful, so make sure to return the correct error code.
To maintain consistency with other locations where bpf_object__open_file() is called, it returns -1 instead.

Link: https://lore.kernel.org/bpf/d3b5b4b4-19bb-4619-b4dd-86c958c4a367@stanley.mountain/t/#u
Closes: https://github.com/libbpf/bpftool/issues/156
Signed-off-by: Sewon Nam <swnam0729@...il.com>
---
 tools/bpf/bpftool/prog.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c
index e71be67f1d86..52ffb74ae4e8 100644
--- a/tools/bpf/bpftool/prog.c
+++ b/tools/bpf/bpftool/prog.c
@@ -1928,6 +1928,7 @@ static int do_loader(int argc, char **argv)

 	obj = bpf_object__open_file(file, &open_opts);
 	if (!obj) {
+		err = -1;
 		p_err("failed to open object file");
 		goto err_close_obj;
 	}
--
2.39.3 (Apple Git-146)