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548c2ede0d
strerror_r(), used from libbpf-specific libbpf_strerror_r() wrapper is documented to return error in two different ways, depending on glibc version. Take that into account when handling strerror_r()'s own errors, which happens when we pass some non-standard (internal) kernel error to it. Before this patch we'd have "ERROR: strerror_r(524)=22", which is quite confusing. Now for the same situation we'll see a bit less visually scary "unknown error (-524)". At least we won't confuse user with irrelevant EINVAL (22). Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/r/20240507001335.1445325-5-andrii@kernel.org Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> |
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