alarm.c (58f0484fa251c266ede97b591b499fe3dd4f578e) alarm.c (22626efa0f96cbca4edae882e46cb56b1879706b)
1/*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#if defined(LIBC_SCCS) && !defined(lint)
35static char sccsid[] = "@(#)alarm.c 8.1 (Berkeley) 6/4/93";
36#endif /* LIBC_SCCS and not lint */
1/*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#if defined(LIBC_SCCS) && !defined(lint)
35static char sccsid[] = "@(#)alarm.c 8.1 (Berkeley) 6/4/93";
36#endif /* LIBC_SCCS and not lint */
37#include <sys/cdefs.h>
38__FBSDID("$FreeBSD$");
37
38/*
39 * Backwards compatible alarm.
40 */
41#include <sys/time.h>
42#include <unistd.h>
43
44unsigned int
45alarm(secs)
46 unsigned int secs;
47{
48 struct itimerval it, oitv;
39
40/*
41 * Backwards compatible alarm.
42 */
43#include <sys/time.h>
44#include <unistd.h>
45
46unsigned int
47alarm(secs)
48 unsigned int secs;
49{
50 struct itimerval it, oitv;
49 register struct itimerval *itp = &it;
51 struct itimerval *itp = &it;
50
51 timerclear(&itp->it_interval);
52 itp->it_value.tv_sec = secs;
53 itp->it_value.tv_usec = 0;
54 if (setitimer(ITIMER_REAL, itp, &oitv) < 0)
55 return (-1);
56 if (oitv.it_value.tv_usec)
57 oitv.it_value.tv_sec++;
58 return (oitv.it_value.tv_sec);
59}
52
53 timerclear(&itp->it_interval);
54 itp->it_value.tv_sec = secs;
55 itp->it_value.tv_usec = 0;
56 if (setitimer(ITIMER_REAL, itp, &oitv) < 0)
57 return (-1);
58 if (oitv.it_value.tv_usec)
59 oitv.it_value.tv_sec++;
60 return (oitv.it_value.tv_sec);
61}