• David Howells's avatar
    statx: Kill fd-with-NULL-path support in favour of AT_EMPTY_PATH · 1e2f82d1
    David Howells authored
    With the new statx() syscall, the following both allow the attributes of
    the file attached to a file descriptor to be retrieved:
    	statx(dfd, NULL, 0, ...);
    	statx(dfd, "", AT_EMPTY_PATH, ...);
    Change the code to reject the first option, though this means copying
    the path and engaging pathwalk for the fstat() equivalent.  dfd can be a
    non-directory provided path is "".
    [ The timing of this isn't wonderful, but applying this now before we
      have statx() in any released kernel, before anybody starts using the
      NULL special case.    - Linus ]
    Fixes: a528d35e
     ("statx: Add a system call to make enhanced file info available")
    Reported-by: default avatarMichael Kerrisk <mtk.manpages@gmail.com>
    Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
    cc: Eric Sandeen <sandeen@sandeen.net>
    cc: fstests@vger.kernel.org
    cc: linux-api@vger.kernel.org
    cc: linux-man@vger.kernel.org
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
stat.c 17 KB