Annotation of src/lib/libc/gen/alarm.c, Revision 1.1.1.2
1.1 cgd 1: /*
1.1.1.2 ! cgd 2: * Copyright (c) 1983, 1993
! 3: * The Regents of the University of California. All rights reserved.
1.1 cgd 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
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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)
1.1.1.2 ! cgd 35: static char sccsid[] = "@(#)alarm.c 8.1 (Berkeley) 6/4/93";
1.1 cgd 36: #endif /* LIBC_SCCS and not lint */
37:
38: /*
39: * Backwards compatible alarm.
40: */
41: #include <sys/time.h>
42: #include <unistd.h>
43:
44: unsigned int
45: alarm(secs)
46: unsigned int secs;
47: {
48: struct itimerval it, oitv;
49: register struct itimerval *itp = ⁢
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: }
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