The error code
.BR EAGAIN
is overloaded to mean "All network ports in use."
-
+.PP
For information on the return from
.BR ruserok ()
and
.BR ruserok_af ()
T} Thread safety MT-Safe locale
.TE
-
+.sp 1
.SH CONFORMING TO
Not in POSIX.1.
Present on the BSDs, Solaris, and many other systems.