Merge from vendor branch BZIP:
[dragonfly.git] / lib / libc / gen / times.c
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1/*-
2 * Copyright (c) 1990, 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
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.
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32 *
33 * @(#)times.c 8.1 (Berkeley) 6/4/93
0f52d283 34 * $DragonFly: src/lib/libc/gen/times.c,v 1.4 2005/11/13 00:07:42 swildner Exp $
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35 */
36
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37#include <sys/param.h>
38#include <sys/time.h>
39#include <sys/times.h>
40#include <sys/resource.h>
41
42/*
43 * Convert usec to clock ticks; could do (usec * CLK_TCK) / 1000000,
44 * but this would overflow if we switch to nanosec.
45 */
46#define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))
47
48clock_t
0f52d283 49times(struct tms *tp)
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50{
51 struct rusage ru;
52 struct timeval t;
53
54 if (getrusage(RUSAGE_SELF, &ru) < 0)
55 return ((clock_t)-1);
56 tp->tms_utime = CONVTCK(ru.ru_utime);
57 tp->tms_stime = CONVTCK(ru.ru_stime);
58 if (getrusage(RUSAGE_CHILDREN, &ru) < 0)
59 return ((clock_t)-1);
60 tp->tms_cutime = CONVTCK(ru.ru_utime);
61 tp->tms_cstime = CONVTCK(ru.ru_stime);
62 if (gettimeofday(&t, (struct timezone *)0))
63 return ((clock_t)-1);
64 return ((clock_t)(CONVTCK(t)));
65}