7e6cabd06e
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
121 lines
3.3 KiB
Groff
121 lines
3.3 KiB
Groff
.\" 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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.\" $FreeBSD$
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.\"
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.Dd February 24, 2011
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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 at 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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The
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.Nm
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utility runs
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.Ar utility
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at an altered scheduling priority, by incrementing its
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.Dq nice
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value by the specified
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.Ar increment ,
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or a default value of 10.
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The lower the nice value of a process, the higher its scheduling priority.
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.Pp
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The superuser may specify a negative increment in order to run a utility
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with a higher scheduling priority.
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.Pp
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Some shells may provide a builtin
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.Nm
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command which is similar or identical to this utility.
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Consult the
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.Xr builtin 1
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manual page.
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.Sh ENVIRONMENT
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The
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.Ev PATH
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environment variable is used to locate the requested
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.Ar utility
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if the name contains no
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.Ql /
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characters.
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.Sh EXIT STATUS
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If
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.Ar utility
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is invoked, the exit status of
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.Nm
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is the exit status of
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.Ar utility .
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.Pp
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An exit status of 126 indicates
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.Ar utility
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was found, but could not be executed.
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An exit status of 127 indicates
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.Ar utility
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could not be found.
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.Sh EXAMPLES
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Execute utility
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.Sq date
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at priority 5 assuming the priority of the
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shell is 0:
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.Pp
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.Dl "nice -n 5 date"
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.Pp
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Execute utility
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.Sq date
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at priority -19 assuming the priority of the
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shell is 0 and you are the super-user:
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.Pp
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.Dl "nice -n 16 nice -n -35 date"
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.Sh COMPATIBILITY
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The traditional
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.Fl Ns Ar increment
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option has been deprecated but is still supported.
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.Sh SEE ALSO
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.Xr builtin 1 ,
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.Xr csh 1 ,
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.Xr idprio 1 ,
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.Xr rtprio 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 -p1003.1-2001 .
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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 v4 .
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