1824ff4dfSmckusick /* 2*bac379f5Sbostic * Copyright (c) 1983, 1993 3*bac379f5Sbostic * The Regents of the University of California. All rights reserved. 49785d310Sbostic * 5be25273bSbostic * %sccs.include.redist.c% 6824ff4dfSmckusick */ 7824ff4dfSmckusick 88ad967f1Sdonn #if defined(LIBC_SCCS) && !defined(lint) 9*bac379f5Sbostic static char sccsid[] = "@(#)alarm.c 8.1 (Berkeley) 06/04/93"; 109785d310Sbostic #endif /* LIBC_SCCS and not lint */ 11f3a9f492Ssam 12f3a9f492Ssam /* 13f3a9f492Ssam * Backwards compatible alarm. 14f3a9f492Ssam */ 15f3a9f492Ssam #include <sys/time.h> 16ae227ee3Sdonn #include <unistd.h> 17f3a9f492Ssam 18ae227ee3Sdonn unsigned int alarm(secs)19f3a9f492Ssamalarm(secs) 20ae227ee3Sdonn unsigned int secs; 21f3a9f492Ssam { 22f3a9f492Ssam struct itimerval it, oitv; 23f3a9f492Ssam register struct itimerval *itp = ⁢ 24f3a9f492Ssam 25f3a9f492Ssam timerclear(&itp->it_interval); 26f3a9f492Ssam itp->it_value.tv_sec = secs; 27f3a9f492Ssam itp->it_value.tv_usec = 0; 28f3a9f492Ssam if (setitimer(ITIMER_REAL, itp, &oitv) < 0) 29f3a9f492Ssam return (-1); 30e486079fSralph if (oitv.it_value.tv_usec) 31e486079fSralph oitv.it_value.tv_sec++; 32f3a9f492Ssam return (oitv.it_value.tv_sec); 33f3a9f492Ssam } 34