Siddhesh Poyarekar b416555431 realpath: Bring back GNU extension on ENOENT and EACCES [BZ #28996] ...

The GNU extension for realpath states that if the path resolution fails
with ENOENT or EACCES and the resolved buffer is non-NULL, it will
contain part of the path that failed resolution.

commit 949ad78a18 broke this when it
omitted the copy on failure.  Bring it back partially to continue
supporting this GNU extension.

Resolves: BZ #28996

Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: Andreas Schwab <schwab@linux-m68k.org>

2022-03-31 22:00:58 +05:30

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