NAME

bindresvport − Bind a socket to a privileged IP port

SYNOPSIS

#include <sys/types.h>
#include <netinet/in.h>
#include <unistd.h> int bindresvport(
        int sd,
        struct sockaddr_in ∗sin );

DESCRIPTION

The bindresvport() function 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 rresvport() (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. 

SEE ALSO

Functions: rcmd(3)