readdir() returned NULL at end-of-directory without ensuring errno was
clean. POSIX requires errno to be unchanged at EOF, but the underlying
read() path may leave a stale errno value. Callers that follow the
POSIX idiom (set errno to 0 before the call, test it after a NULL
return), such as readdir_r() and scandir(), then misread this as a
readdir() failure.
Save errno on entry and restore it on the end-of-directory return so
that EOF no longer reports a spurious error, while genuine errors
(read() returning a negative value) still propagate.
Signed-off-by: yushuailong <yyyusl@qq.com>
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
