bindresvport(3)bindresvport(3)NAMEbindresvport - 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)bindresvport(3)