121 lines
3.3 KiB
Groff
121 lines
3.3 KiB
Groff
.\" $NetBSD: nice.1,v 1.15 2012/03/22 07:58:19 wiz Exp $
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.\"
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.\" Copyright (c) 1980, 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)nice.1 8.1 (Berkeley) 6/6/93
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.\"
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.Dd June 6, 1993
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.Dt NICE 1
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.Os
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.Sh NAME
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.Nm nice
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.Nd execute a utility with an altered scheduling priority
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.Sh SYNOPSIS
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.Nm
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.Op Fl n Ar increment
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.Ar utility
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.Op Ar argument ...
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.Sh DESCRIPTION
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.Nm
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runs
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.Ar utility
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at an altered scheduling priority.
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If an
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.Ar increment
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is given, it is used; otherwise
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an increment of 10 is assumed.
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The super-user can run utilities with priorities higher than normal by using
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a negative
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.Ar increment .
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The priority can be adjusted over a
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range of -20 (the highest) to 20 (the lowest).
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A priority of 19 or 20
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will prevent a process from taking any cycles from others at nice 0 or
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better.
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.Pp
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Available options:
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.Bl -tag -width indent
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.It Fl n Ar increment
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A positive or negative decimal integer used to modify the system scheduling
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priority of
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.Ar utility .
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.El
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.Sh EXIT STATUS
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The
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.Nm
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utility exits with one of the following values:
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.Bl -tag -width indent
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.It 1-125
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An error occurred in the
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.Nm
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utility.
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.It 126
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The
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.Ar utility
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was found but could not be invoked.
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.It 127
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The
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.Ar utility
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could not be found.
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.El
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.Pp
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Otherwise, the exit status of
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.Nm
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will be that of
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.Ar utility .
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.Sh COMPATIBILITY
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The historic
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.Fl Ns Ar increment
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option has been deprecated but is still supported in this implementation.
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.Sh SEE ALSO
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.Xr csh 1 ,
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.Xr getpriority 2 ,
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.Xr setpriority 2 ,
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.Xr renice 8
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.Sh STANDARDS
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The
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.Nm
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utility conforms to
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.St -p1003.2-92 .
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.Sh HISTORY
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A
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.Nm
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utility appeared in
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.At v6 .
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.Sh BUGS
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.Nm
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is built into
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.Xr csh 1
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with a slightly different syntax than described here.
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The form
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.Ql nice +10
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nices to positive nice, and
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.Ql nice \-10
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can be used
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by the super-user to give a process more of the processor.
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