minix/usr.bin/renice/renice.8
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

151 lines
4.1 KiB
Groff

.\" $NetBSD: renice.8,v 1.15 2012/12/06 07:52:12 wiz Exp $
.\"
.\" Copyright (c) 1983, 1991, 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. 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.
.\"
.\" from: @(#)renice.8 8.1 (Berkeley) 6/9/93
.\"
.Dd December 6, 2012
.Dt RENICE 8
.Os
.Sh NAME
.Nm renice
.Nd alter priority of running processes
.Sh SYNOPSIS
.Nm
.Ar priority
.Oo
.Op Fl p
.Ar pid ...
.Oc
.Oo
.Fl g
.Ar pgrp ...
.Oc
.Oo
.Fl u
.Ar user ...
.Oc
.Nm
.Fl n
.Ar increment
.Oo
.Op Fl p
.Ar pid ...
.Oc
.Oo
.Fl g
.Ar pgrp ...
.Oc
.Oo
.Fl u
.Ar user ...
.Oc
.Sh DESCRIPTION
.Nm
alters the
scheduling priority of one or more running processes.
The following
.Ar who
parameters are interpreted as process ID's, process group
ID's, or user names.
.Nm Ns 'ing
a process group causes all processes in the process group
to have their scheduling priority altered.
.Nm Ns 'ing
a user causes all processes owned by the user to have
their scheduling priority altered.
By default, the processes to be affected are specified by
their process ID's.
.Pp
Options supported by
.Nm :
.Bl -tag -width Ds
.It Fl g
Force
.Ar who
parameters to be interpreted as process group ID's.
.It Fl n
Instead of changing the specified processes to the given priority,
interpret the following argument as an increment to be applied to
the current priority of each process.
.It Fl u
Force the
.Ar who
parameters to be interpreted as user names.
.It Fl p
Resets the
.Ar who
interpretation to be (the default) process ID's.
.El
.Pp
For example,
.Bd -literal -offset indent
renice +1 987 -u daemon root -p 32
.Ed
.Pp
would change the priority of process ID's 987 and 32, and
all processes owned by users daemon and root.
.Pp
Users other than the super-user may only alter the priority of
processes they own,
and can only monotonically increase their ``nice value''
within the range 0 to
.Dv PRIO_MAX
(20).
(This prevents overriding administrative fiats.)
The super-user
may alter the priority of any process
and set the priority to any value in the range
.Dv PRIO_MIN
(\-20)
to
.Dv PRIO_MAX .
.Pp
Useful priorities are:
0, the ``base'' scheduling priority;
20, the affected processes will run only when nothing at the base priority
wants to;
anything negative, the processes will receive a scheduling preference.
.Sh FILES
.Bl -tag -width /etc/passwd -compact
.It Pa /etc/passwd
to map user names to user ID's
.El
.Sh SEE ALSO
.Xr nice 1 ,
.Xr prenice 1 ,
.Xr getpriority 2 ,
.Xr setpriority 2
.Sh HISTORY
The
.Nm
command appeared in
.Bx 4.0 .
.Sh BUGS
Non super-users can not increase scheduling priorities of their own processes,
even if they were the ones that decreased the priorities in the first place.