libbpf: fix errno is overwritten after being closed.

Browse source

In the ensure_good_fd function, if the fcntl function succeeds but
the close function fails, ensure_good_fd returns a normal fd and
sets errno, which may cause users to misunderstand. The close
failure is not a serious problem, and the correct FD has been
handed over to the upper-layer application. Let's restore errno here.

Signed-off-by: Xin Liu <liuxin350@huawei.com>
Link: https://lore.kernel.org/r/20221223133618.10323-1-liuxin350@huawei.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

...

This commit is contained in:

Xin Liu 2022-12-23 21:36:18 +08:00 • committed by Alexei Starovoitov

parent 4633a00682

commit 0745324562

1 changed files with 2 additions and 3 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

5

tools/lib/bpf/libbpf_internal.h

View file