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Message-Id: <20220403135245.1713283-1-ytcoode@gmail.com>
Date:   Sun,  3 Apr 2022 21:52:45 +0800
From:   Yuntao Wang <ytcoode@...il.com>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>
Cc:     Martin KaFai Lau <kafai@...com>, Song Liu <songliubraving@...com>,
        Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, Shuah Khan <shuah@...nel.org>,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        Yuntao Wang <ytcoode@...il.com>
Subject: [PATCH bpf-next] selftests/bpf: Fix cd_flavor_subdir() of test_progs

Currently, when we run test_progs with just executable file name, for
example 'PATH=. test_progs-no_alu32', cd_flavor_subdir() will not check
if test_progs is running as a flavored test runner and switch into
corresponding sub-directory.

This will cause test_progs-no_alu32 executed by the
'PATH=. test_progs-no_alu32' command to run in the wrong directory and
load the wrong BPF objects.

Signed-off-by: Yuntao Wang <ytcoode@...il.com>
---
 tools/testing/selftests/bpf/test_progs.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c
index 2ecb73a65206..0a4b45d7b515 100644
--- a/tools/testing/selftests/bpf/test_progs.c
+++ b/tools/testing/selftests/bpf/test_progs.c
@@ -761,8 +761,10 @@ int cd_flavor_subdir(const char *exec_name)
 	const char *flavor = strrchr(exec_name, '/');
 
 	if (!flavor)
-		return 0;
-	flavor++;
+		flavor = exec_name;
+	else
+		flavor++;
+
 	flavor = strrchr(flavor, '-');
 	if (!flavor)
 		return 0;
-- 
2.35.1

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