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freebsd-skq/usr.bin/nice/nice.1

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BSD 4.4 Lite Usr.bin Sources
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.\" Copyright (c) 1980, 1990, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by the University of
.\" California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)nice.1 8.1 (Berkeley) 6/6/93
$Id$ -> $FreeBSD$
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.\" $FreeBSD$
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.\"
.Dd June 6, 1993
.Dt NICE 1
mdoc(7) police: removed HISTORY info from the .Os call.
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.Os
BSD 4.4 Lite Usr.bin Sources
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.Sh NAME
.Nm nice
.Nd execute a command at a low scheduling priority
.Sh SYNOPSIS
.Nm nice -> .Nm.
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.Nm
BSD 4.4 Lite Usr.bin Sources
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.Op Fl Ns Ar number
.Ar command
.Op Ar arguments
.Sh DESCRIPTION
Use `The .Nm utility'
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The
.Nm
utility runs
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.Ar command
at a low priority.
(Think of low and slow).
If
.Fl Ns Ar number
Fix a typo and a punctuation mistake, the two of which conspired against the reader.
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is not given,
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.Nm
Fix a typo and a punctuation mistake, the two of which conspired against the reader.
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assumes the value 10.
Correct some hard sentence breaks. Only those surrounding the previous commit and those which cause ugly nroff output have been fixed, since the purpose of the style guideline which they contravene is to reduce the sizes of deltas. Reported by: bde
1999-09-14 11:46:04 +00:00
The priority is a value in the range -20 to 20.
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The default priority is 0, priority 20 is the lowest possible.
Use `The .Nm utility'
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The
.Nm
utility will execute
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.Ar command
Match the reality. The man page was completely wrong.
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at priority
.Ar number
relative to the priority
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of
mdoc(7) police: use the new features of the Nm macro.
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.Nm .
Match the reality. The man page was completely wrong.
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Higher priorities than the
current process priority can only requested by the
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super-user.
BSD 4.4 Lite Usr.bin Sources
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Negative numbers are expressed as
.Fl - Ns Ar number .
.Pp
Improve shell documentation: * Consistently misspell built-in as builtin. * Add a builtin(1) manpage and create builtin(1) MLINKS for all shell builtin commands for which no standalone utility exists. These MLINKS replace those that were created for csh(1). * Add appropriate xrefs for builtin(1) to the csh(1) and sh(1) manpages, as well as to the manpages of standalone utilities which are supported as shell builtin commands in at least one of the shells. In such manpages, explain that similar functionality may be provided as a shell builtin command. * Improve sh(1)'s description of the cd builtin command. Csh(1) already describes it adequately. Replace the cd(1) manpage with a builtin(1) MLINKS link. * Clean up some mdoc problems: use Xr instead of literal "foo(n)"; use Ic instead of Xr for shell builtin commands. * Undo English contractions. Reviewed by: mpp, rgrimes
1999-09-08 15:40:46 +00:00
Some shells may provide a builtin
.Nm
Correct some hard sentence breaks. Only those surrounding the previous commit and those which cause ugly nroff output have been fixed, since the purpose of the style guideline which they contravene is to reduce the sizes of deltas. Reported by: bde
1999-09-14 11:46:04 +00:00
command which is similar or identical to this utility.
Consult the
Improve shell documentation: * Consistently misspell built-in as builtin. * Add a builtin(1) manpage and create builtin(1) MLINKS for all shell builtin commands for which no standalone utility exists. These MLINKS replace those that were created for csh(1). * Add appropriate xrefs for builtin(1) to the csh(1) and sh(1) manpages, as well as to the manpages of standalone utilities which are supported as shell builtin commands in at least one of the shells. In such manpages, explain that similar functionality may be provided as a shell builtin command. * Improve sh(1)'s description of the cd builtin command. Csh(1) already describes it adequately. Replace the cd(1) manpage with a builtin(1) MLINKS link. * Clean up some mdoc problems: use Xr instead of literal "foo(n)"; use Ic instead of Xr for shell builtin commands. * Undo English contractions. Reviewed by: mpp, rgrimes
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.Xr builtin 1
manual page.
Match the reality. The man page was completely wrong.
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.Sh EXAMPLES
$ nice -5 date
.Pp
Remove whitespace at EOL.
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Execute command
.Sq date
Match the reality. The man page was completely wrong.
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at priority 5 assuming the priority of the
shell is 0.
.Pp
# nice -16 nice --35 date
.Pp
Remove whitespace at EOL.
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Execute command
.Sq date
Match the reality. The man page was completely wrong.
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at priority -19 assuming the priority of the
shell is 0 and you are the super-user.
According to POSIX, exit status must be 127 if the requested utility was not found, 126 if the execvp() failed for any other reason. Similar to rev. 1.6 to src/usr.bin/env/env.c Reviewed by: mike
2002-05-10 06:39:16 +00:00
.Sh DIAGNOSTICS
If
.Ar command
is invoked, the exit status of
.Nm
is the exit status of
.Ar command .
.Pp
An exit status of 126 indicates
.Ar command
was found, but could not be executed.
An exit status of 127 indicates
.Ar command
could not be found.
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.Sh SEE ALSO
Improve shell documentation: * Consistently misspell built-in as builtin. * Add a builtin(1) manpage and create builtin(1) MLINKS for all shell builtin commands for which no standalone utility exists. These MLINKS replace those that were created for csh(1). * Add appropriate xrefs for builtin(1) to the csh(1) and sh(1) manpages, as well as to the manpages of standalone utilities which are supported as shell builtin commands in at least one of the shells. In such manpages, explain that similar functionality may be provided as a shell builtin command. * Improve sh(1)'s description of the cd builtin command. Csh(1) already describes it adequately. Replace the cd(1) manpage with a builtin(1) MLINKS link. * Clean up some mdoc problems: use Xr instead of literal "foo(n)"; use Ic instead of Xr for shell builtin commands. * Undo English contractions. Reviewed by: mpp, rgrimes
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.Xr builtin 1 ,
Sort cross references.
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.Xr csh 1 ,
Add ref to idprio(1).
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.Xr idprio 1 ,
Various man page cleanup: - Sort xrefs - Be consistent with section names as outlines in mdoc(7). - Other misc mdoc cleanup. PR: doc/13144 Submitted by: Alexey M. Zelkin <phantom@cris.net>
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.Xr rtprio 1 ,
Match the reality. The man page was completely wrong.
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.Xr getpriority 2 ,
.Xr setpriority 2 ,
Various man page cleanup: - Sort xrefs - Be consistent with section names as outlines in mdoc(7). - Other misc mdoc cleanup. PR: doc/13144 Submitted by: Alexey M. Zelkin <phantom@cris.net>
1999-08-15 08:25:34 +00:00
.Xr renice 8
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.Sh HISTORY
A
.Nm nice -> .Nm.
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.Nm
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command appeared in
.At v6 .
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