/* readn.c - From Jon C. Snader: Effective TCP/IP Programming
 *           Addison-Wesley 2000
 *           For better understanding, read the excellent Snader book.
 */

#include "etcp.h"

/* signal - a reliable version for SVR4 and others */
typedef void sighndlr_t( int );
sighndlr_t *signal( int sig, sighndlr_t *hndlr )
{
        struct sigaction act;
        struct sigaction xact;

        act.sa_handler = hndlr;
        act.sa_flags = 0;
        sigemptyset( &act.sa_mask );
        if ( sigaction( sig, &act, &xact ) < 0 )
                return SIG_ERR;
        return xact.sa_handler;
}