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>
#include <unistd.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. This routine differs with rresv-
port (see rcmd(3)) in that this works for any IP socket, whereas rresvport() only works for TCP.
Only root can bind to a privileged port; this call will fail for any other users.
RELATED INFORMATION
rcmd(3) delim off
bindresvport(3)
