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renice(8): Clarify "who" parameters.

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There was a question raised in freebsd-questions@ mail list[1] about the
"who" parameters in this man page. It seems OpenBSD[2] amd NetBSD[3]
both have more legible descriptions so I borrowed some of their ideas to try
and make this page clearer.

[1] https://lists.freebsd.org/pipermail/freebsd-questions/2020-October/291914.html
[2] https://man.bsd.lv/renice
[3] https://man.netbsd.org/renice.8

Approved by:	manpages (bcr@)
Differential Revision:		https://reviews.freebsd.org/D26950
This commit is contained in:
Fernando Apesteguía 2020-10-27 12:32:17 +00:00
parent b0d30b27f0
commit f8ae041a04
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=367077
1 changed files with 16 additions and 22 deletions
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38
usr.bin/renice/renice.8
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@ -28,7 +28,7 @@
.\" @(#)renice.8 8.1 (Berkeley) 6/9/93
.\" $FreeBSD$
.\"
.Dd June 9, 1993
.Dd October 27, 2020
.Dt RENICE 8
.Os
.Sh NAME
@ -37,22 +37,18 @@
.Sh SYNOPSIS
.Nm
.Ar priority
.Op Oo Fl p Oc Ar pid ...
.Op Oo Fl g Oc Ar pgrp ...
.Op Oo Fl u Oc Ar user ...
.Op Oo Fl gpu Oc Ar target
.Nm
.Fl n Ar increment
.Op Oo Fl p Oc Ar pid ...
.Op Oo Fl g Oc Ar pgrp ...
.Op Oo Fl u Oc Ar user ...
.Op Oo Fl gpu Oc Ar target
.Sh DESCRIPTION
The
.Nm
utility alters the
scheduling priority of one or more running processes.
The following
.Ar who
parameters are interpreted as process ID's, process group
.Ar target
parameters are interpreted as process ID's (the default), process group
ID's, user ID's or user names.
The
.Nm Ns 'ing
@ -62,27 +58,25 @@ The
.Nm Ns 'ing
of 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
The following options are available:
.Bl -tag -width indent
.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 or user ID's.
.It Fl g
Interpret
.Ar target
parameters as process group ID's.
.It Fl p
Reset the
.Ar who
interpretation to be (the default) process ID's.
Interpret
.Ar target
parameters as process ID's (the default).
.It Fl u
Interpret
.Ar target
parameters as user names or user ID's.
.El
.Pp
Users other than the super-user may only alter the priority of