1.\" $NetBSD: nice.1,v 1.12 2001/12/08 19:09:35 wiz Exp $ 2.\" 3.\" Copyright (c) 1980, 1990, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" @(#)nice.1 8.1 (Berkeley) 6/6/93 35.\" 36.Dd June 6, 1993 37.Dt NICE 1 38.Os 39.Sh NAME 40.Nm nice 41.Nd execute a utility with an altered scheduling priority 42.Sh SYNOPSIS 43.Nm 44.Op Fl n Ar increment 45.Ar utility 46.Op Ar argument ... 47.Sh DESCRIPTION 48.Nm 49runs 50.Ar utility 51at an altered scheduling priority. 52If an 53.Ar increment 54is given, it is used; otherwise 55an increment of 10 is assumed. 56The super-user can run utilities with priorities higher than normal by using 57a negative 58.Ar increment . 59The priority can be adjusted over a 60range of -20 (the highest) to 20 (the lowest). A priority of 19 or 20 61will prevent a process from taking any cycles from others at nice 0 or 62better. 63.Pp 64Available options: 65.Bl -tag -width indent 66.It Fl n Ar increment 67A positive or negative decimal integer used to modify the system scheduling 68priority of 69.Ar utility . 70.El 71.Sh EXIT STATUS 72The 73.Nm 74utility exits with one of the following values: 75.Bl -tag -width indent 76.It 1-125 77An error occurred in the 78.Nm 79utility. 80.It 126 81The 82.Ar utility 83was found but could not be invoked. 84.It 127 85The 86.Ar utility 87could not be found. 88.El 89.Pp 90Otherwise, the exit status of 91.Nm 92will be that of 93.Ar utility . 94.Sh COMPATIBILITY 95The historic 96.Fl Ns Ar increment 97option has been deprecated but is still supported in this implementation. 98.Sh SEE ALSO 99.Xr csh 1 , 100.Xr getpriority 2 , 101.Xr setpriority 2 , 102.Xr renice 8 103.Sh STANDARDS 104The 105.Nm 106utility conforms to 107.St -p1003.2-92 . 108.Sh HISTORY 109A 110.Nm 111utility appeared in 112.At v6 . 113.Sh BUGS 114.Nm 115is built into 116.Xr csh 1 117with a slightly different syntax than described here. The form 118.Ql nice +10 119nices to positive nice, and 120.Ql nice \-10 121can be used 122by the super-user to give a process more of the processor. 123