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Manual Reference Pages  - BINDRESVPORT (3)

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bindresvport - bind a socket to a privileged IP port

CONTENTS

Synopsis
Description

#include <sys/types.h> 

#include <netinet/in.h> 



int bindresvport(sd, sin) 

int sd; 

struct sockaddr_in *sin; 

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.