redhat man page for bindresvport

BINDRESVPORT(3) 					     Library Functions Manual						   BINDRESVPORT(3)

NAME
       bindresvport - bind a socket to a privileged IP port

SYNOPSIS
       #include <sys/types.h>
       #include <netinet/in.h>

       int bindresvport(sd, sin)
       int sd;
       struct sockaddr_in *sin;

DESCRIPTION
       bindresvport()  is  used  to  bind  a  socket  descriptor to a privileged IP port, that is, a port number in the range 0-1023.  The routine
       returns 0 if it is successful, otherwise -1 is returned and errno set to reflect the cause of the error.

       Only root can bind to a privileged port; this call will fail for any other users.

								    1987-11-22							   BINDRESVPORT(3)