Annotation of src/lib/libc/gen/alarm.c, Revision 1.4.4.1
1.4.4.1 ! jtc 1: /* $NetBSD: alarm.c,v 1.4 1995/02/25 15:39:04 cgd Exp $ */
1.4 cgd 2:
1.1 cgd 3: /*
1.4 cgd 4: * Copyright (c) 1983, 1993
5: * The Regents of the University of California. All rights reserved.
1.1 cgd 6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #if defined(LIBC_SCCS) && !defined(lint)
1.4 cgd 37: #if 0
38: static char sccsid[] = "@(#)alarm.c 8.1 (Berkeley) 6/4/93";
39: #else
1.4.4.1 ! jtc 40: static char rcsid[] = "$NetBSD: alarm.c,v 1.4 1995/02/25 15:39:04 cgd Exp $";
1.4 cgd 41: #endif
1.1 cgd 42: #endif /* LIBC_SCCS and not lint */
43:
44: /*
45: * Backwards compatible alarm.
46: */
1.4.4.1 ! jtc 47: #include "namespace.h"
1.1 cgd 48: #include <sys/time.h>
49: #include <unistd.h>
1.4.4.1 ! jtc 50:
! 51: #ifdef __weak_alias
! 52: __weak_alias(alarm,_alarm);
! 53: #endif
1.1 cgd 54:
55: unsigned int
56: alarm(secs)
57: unsigned int secs;
58: {
59: struct itimerval it, oitv;
60: register struct itimerval *itp = ⁢
61:
62: timerclear(&itp->it_interval);
63: itp->it_value.tv_sec = secs;
64: itp->it_value.tv_usec = 0;
65: if (setitimer(ITIMER_REAL, itp, &oitv) < 0)
66: return (-1);
67: if (oitv.it_value.tv_usec)
68: oitv.it_value.tv_sec++;
69: return (oitv.it_value.tv_sec);
70: }
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