GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/gen/nice.c Lines: 0 8 0.0 %
Date: 2017-11-07 Branches: 0 8 0.0 %

Line Branch Exec Source
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
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. Neither the name of the University nor the names of its contributors
14
 *    may be used to endorse or promote products derived from this software
15
 *    without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27
 * SUCH DAMAGE.
28
 */
29
30
#include <sys/types.h>
31
#include <sys/time.h>
32
#include <sys/resource.h>
33
#include <errno.h>
34
#include <limits.h>
35
#include <unistd.h>
36
37
/*
38
 * Backwards compatible nice().
39
 */
40
int
41
nice(int incr)
42
{
43
	int prio;
44
45
	errno = 0;
46
	prio = getpriority(PRIO_PROCESS, 0);
47
	if (prio == -1 && errno)
48
		return (-1);
49
	prio += incr;
50
	if (setpriority(PRIO_PROCESS, 0, prio) != 0)
51
		return (-1);
52
	/* Valid range for prio is -NZERO to NZERO (inclusive).  */
53
	return (prio < -NZERO ? -NZERO : prio > NZERO ? NZERO : prio);
54
}