5 POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/access.html}
9 Portability problems fixed by Gnulib:
13 Portability problems not fixed by Gnulib:
16 This function uses the effective id instead of the real id on some
20 There is an inherent race between calling this function and performing
21 some action based on the results; you should think twice before
22 trusting this function in a set-uid or set-gid program.