NAME

bindresvport − bind a socket to a privileged IP port

SYNOPSIS

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

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. 

7th Edition  —  6 October 1987