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Annotation of 43BSD/lib/libc/gen/alarm.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  */
                      6: 
                      7: #if defined(LIBC_SCCS) && !defined(lint)
                      8: static char sccsid[] = "@(#)alarm.c    5.2 (Berkeley) 3/9/86";
                      9: #endif LIBC_SCCS and not lint
                     10: 
                     11: /*
                     12:  * Backwards compatible alarm.
                     13:  */
                     14: #include <sys/time.h>
                     15: 
                     16: alarm(secs)
                     17:        int secs;
                     18: {
                     19:        struct itimerval it, oitv;
                     20:        register struct itimerval *itp = &it;
                     21: 
                     22:        timerclear(&itp->it_interval);
                     23:        itp->it_value.tv_sec = secs;
                     24:        itp->it_value.tv_usec = 0;
                     25:        if (setitimer(ITIMER_REAL, itp, &oitv) < 0)
                     26:                return (-1);
                     27:        if (oitv.it_value.tv_usec)
                     28:                oitv.it_value.tv_sec++;
                     29:        return (oitv.it_value.tv_sec);
                     30: }

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