Removed older regexp function for new POSIX regex handling due to
[unix-history] / lib / libc / gen / nice.3
CommitLineData
15637ed4
RG
1.\" Copyright (c) 1980, 1991 Regents of the University of California.
2.\" All rights reserved.
3.\"
4.\" Redistribution and use in source and binary forms, with or without
5.\" modification, are permitted provided that the following conditions
6.\" are met:
7.\" 1. Redistributions of source code must retain the above copyright
8.\" notice, this list of conditions and the following disclaimer.
9.\" 2. Redistributions in binary form must reproduce the above copyright
10.\" notice, this list of conditions and the following disclaimer in the
11.\" documentation and/or other materials provided with the distribution.
12.\" 3. All advertising materials mentioning features or use of this software
13.\" must display the following acknowledgement:
14.\" This product includes software developed by the University of
15.\" California, Berkeley and its contributors.
16.\" 4. Neither the name of the University nor the names of its contributors
17.\" may be used to endorse or promote products derived from this software
18.\" without specific prior written permission.
19.\"
20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30.\" SUCH DAMAGE.
31.\"
32.\" @(#)nice.3 6.2 (Berkeley) 4/19/91
33.\"
34.Dd April 19, 1991
35.Dt NICE 3
36.Os BSD 4
37.Sh NAME
38.Nm nice
39.Nd set program scheduling priority
40.Sh SYNOPSIS
41.Fn nice "int incr"
42.Sh DESCRIPTION
43.Bf -symbolic
44This interface is obsoleted by setpriority(2).
45.Ef
46.Pp
47The
48.Fn nice
49function obtains the scheduling priority of the process
50from the system and sets it to the priority value specified in
51.Fa incr .
52The priority is a value in the range -20 to 20.
53The default priority is 0; lower priorities cause more favorable scheduling.
54Only the super-user may lower priorities.
55.Pp
56Children inherit the priority of their parent processes via
57.Xr fork 2 .
58.Sh SEE ALSO
59.Xr nice 1 ,
60.Xr setpriority 2 ,
61.Xr fork 2 ,
62.Xr renice 8
63.Sh HISTORY
64A
65.Fn nice
66syscall appeared in
67.At v6 .