Johannes? Ping?
On Jul 12 14:07, Corinna Vinschen wrote:
> From: Corinna Vinschen <cori...@vinschen.de>
>
> The GLIBC extension AT_EMPTY_PATH allows the functions fchownat
> and fstatat to operate on dirfd alone, if the given pathname is an
> empty string. This also allows to operate on any file type, not
> only directories.
>
> Commit fa84aa4dd2fb4 broke this. It only allows dirfd to be a
> directory in calls to these two functions.
>
> Fix that by handling AT_EMPTY_PATH right in gen_full_path_at.
> A valid dirfd and an empty pathname is now a valid combination
> and, noticably, this returns a valid path in path_ret. That
> in turn allows to remove the additional path generation code
> from the callers.
>
> Fixes: fa84aa4dd2fb ("Cygwin: fix errno values set by readlinkat")
> Reported-by: Johannes Schindelin <johannes.schinde...@gmx.de>
> Signed-off-by: Corinna Vinschen <cori...@vinschen.de>
>
> Corinna Vinschen (5):
> Cygwin: gen_full_path_at: drop never reached code
> Define _AT_NULL_PATHNAME_ALLOWED
> Cygwin: use new _AT_NULL_PATHNAME_ALLOWED flag
> Cygwin: Fix and streamline AT_EMPTY_PATH handling
> Cygwin: add AT_EMPTY_PATH fix to release message
>
> newlib/libc/include/sys/_default_fcntl.h | 11 +++--
> winsup/cygwin/release/3.4.8 | 4 ++
> winsup/cygwin/syscalls.cc | 61 ++++++------------------
> 3 files changed, 25 insertions(+), 51 deletions(-)
>
> --
> 2.40.1
