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
135 lines
4.1 KiB
Groff
135 lines
4.1 KiB
Groff
.\" Copyright (c) 1983, 1991, 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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.\" @(#)renice.8 8.1 (Berkeley) 6/9/93
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.\" $FreeBSD$
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.\"
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.Dd June 9, 1993
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.Dt RENICE 8
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.Os
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.Sh NAME
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.Nm renice
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.Nd alter priority of running processes
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.Sh SYNOPSIS
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.Nm
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.Ar priority
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.Op Oo Fl p Oc Ar pid ...
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.Op Oo Fl g Oc Ar pgrp ...
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.Op Oo Fl u Oc Ar user ...
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.Nm
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.Fl n Ar increment
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.Op Oo Fl p Oc Ar pid ...
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.Op Oo Fl g Oc Ar pgrp ...
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.Op Oo Fl u Oc Ar user ...
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.Sh DESCRIPTION
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The
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.Nm
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utility alters the
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scheduling priority of one or more running processes.
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The following
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.Ar who
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parameters are interpreted as process ID's, process group
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ID's, user ID's or user names.
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The
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.Nm Ns 'ing
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of a process group causes all processes in the process group
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to have their scheduling priority altered.
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The
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.Nm Ns 'ing
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of a user causes all processes owned by the user to have
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their scheduling priority altered.
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By default, the processes to be affected are specified by
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their process ID's.
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.Pp
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The following options are available:
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.Bl -tag -width indent
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.It Fl g
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Force
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.Ar who
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parameters to be interpreted as process group ID's.
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.It Fl n
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Instead of changing the specified processes to the given priority,
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interpret the following argument as an increment to be applied to
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the current priority of each process.
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.It Fl u
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Force the
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.Ar who
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parameters to be interpreted as user names or user ID's.
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.It Fl p
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Reset the
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.Ar who
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interpretation to be (the default) process ID's.
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.El
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.Pp
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Users other than the super-user may only alter the priority of
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processes they own,
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and can only monotonically increase their ``nice value''
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within the range 0 to
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.Dv PRIO_MAX
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(20).
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(This prevents overriding administrative fiats.)
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The super-user
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may alter the priority of any process
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and set the priority to any value in the range
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.Dv PRIO_MIN
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(\-20)
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to
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.Dv PRIO_MAX .
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Useful priorities are:
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20 (the affected processes will run only when nothing else
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in the system wants to),
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0 (the ``base'' scheduling priority),
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anything negative (to make things go very fast).
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.Sh FILES
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.Bl -tag -width /etc/passwd -compact
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.It Pa /etc/passwd
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to map user names to user ID's
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.El
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.Sh EXAMPLES
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Change the priority of process ID's 987 and 32, and
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all processes owned by users daemon and root.
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.Pp
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.Dl "renice +1 987 -u daemon root -p 32"
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.Sh SEE ALSO
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.Xr nice 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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.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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The
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.Nm
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utility appeared in
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.Bx 4.0 .
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.Sh BUGS
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Non super-users cannot increase scheduling priorities of their own processes,
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even if they were the ones that decreased the priorities in the first place.
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