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libbpf: make libbpf_strerror_r agnostic to sign of error 

It's often inconvenient to switch sign of error when passing it into
libbpf_strerror_r. It's better for it to handle that automatically.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Andrii Nakryiko 2019-07-01 16:58:55 -07:00 committed by Daniel Borkmann
parent c4cde5804d
commit d66f43666a
1 changed files with 1 additions and 1 deletions
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2
tools/lib/bpf/str_error.c
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@ -11,7 +11,7 @@
*/ */
char *libbpf_strerror_r(int err, char *dst, int len) char *libbpf_strerror_r(int err, char *dst, int len)
{ {
int ret = strerror_r(err, dst, len); int ret = strerror_r(err < 0 ? -err : err, dst, len);
if (ret) if (ret)
snprintf(dst, len, "ERROR: strerror_r(%d)=%d", err, ret); snprintf(dst, len, "ERROR: strerror_r(%d)=%d", err, ret);
return dst; return dst;