POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/fchownat.html}
-Gnulib module: openat
+Gnulib module: fchownat
Portability problems fixed by Gnulib:
@itemize
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.
+glibc 2.3.6, Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8,
+AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Cygwin 1.5.x, mingw, MSVC 9, 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