@node fchownat
@section @code{fchownat}
@findex fchownat

POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/fchownat.html}

Gnulib module: openat

Portability problems fixed by Gnulib:
@itemize
@item
Some platforms fail to detect trailing slash on non-directories, as in
@code{fchown(dir,"link-to-file/",uid,gid,flag)}:
Solaris 9.
@item
Some platforms mistakenly dereference symlinks when using
@code{AT_SYMLINK_NOFOLLOW}:
Linux kernel 2.6.17.
@item
This function does not fail for an empty filename on some platforms:
Linux with glibc < 2.11.
@item
This function is missing on some platforms:
glibc 2.3.6, MacOS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, AIX
5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Cygwin 1.5.x, mingw, Interix 3.5, BeOS.
But the replacement function is not safe to be used in libraries and
is not multithread-safe.  Also, the replacement may fail to change
symlinks if @code{lchown} is unsupported, or fail altogether if
@code{chown} is unsupported.
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@end itemize
