manual page distributed with 4.2BSD

SCCS-vsn: usr.bin/renice/renice.8 5.1

diff --git a/usr/src/usr.bin/renice/renice.8 b/usr/src/usr.bin/renice/renice.8
index 5bc5428..ccc66bb 100644 (file)
--- a/usr/src/usr.bin/renice/renice.8
+++ b/usr/src/usr.bin/renice/renice.8
@@ -2,33 +2,77 @@
 .\" All rights reserved.  The Berkeley software License Agreement
 .\" specifies the terms and conditions for redistribution.
 .\"
 .\" All rights reserved.  The Berkeley software License Agreement
 .\" specifies the terms and conditions for redistribution.
 .\"

-.\"    @(#)renice.8    4.1 (Berkeley) %G%
+.\"    @(#)renice.8    5.1 (Berkeley) %G%

 .\"
 .\"

-.TH RENICE 8 "4/1/81"
+.TH RENICE 8 "24 July 1983"

 .UC 4
 .SH NAME
 .UC 4
 .SH NAME

-renice \- alter priority of running process by changing nice
+renice \- alter priority of running processes

 .SH SYNOPSIS
 .B /etc/renice
 .SH SYNOPSIS
 .B /etc/renice

-pid
-[ priority ]
+priority [ [
+.B \-p
+] pid ... ] [ [
+.B \-g
+] pgrp ... ] [ [
+.B \-u
+] user ... ]

 .SH DESCRIPTION
 .I Renice
 .SH DESCRIPTION
 .I Renice

-can be used by the super-user to alter the 
-priority of a running process.
-By default, the nice of the process is made \*(lq19\*(rq which means that it
-will run only when nothing else in the system wants to.  This can be used
-to nail long running processes which are interfering with interactive work.
+alters the 
+scheduling priority of one or more running processes.
+The
+.I who
+parameters are interpreted as process ID's, process group
+ID's, or user names.
+.IR Renice 'ing
+a process group causes all processes in the process group
+to have their scheduling priority altered.  
+.IR Renice '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.  To force 
+.I who
+parameters to be interpreted as process group ID's, a
+.B \-g 
+may be specified.  To force the
+.I who
+parameters to be interpreted as user names, a
+.B \-u
+may be given.  Supplying
+.B \-p
+will reset 
+.I who
+interpretation to be (the default) process ID's.
+For example,
+.sp
+       /etc/renice +1 987 -u daemon root -p 32 
+.sp
+would change the priority of process ID's 987 and 32, and
+all processes owned by users daemon and root.

 .PP
 .PP

-.I Renice
-can be given a second argument to choose a nice other than the default.
-Negative nices can be used to make things go very fast.
+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 PRIO_MIN (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 PRIO_MAX (\-20)
+to PRIO_MIN.
+Useful priorities are:
+19 (the affected processes will run only when nothing else
+in the system wants to),
+0 (the ``base'' scheduling priority),
+anything negative (to make things go very fast).

 .SH FILES
 .SH FILES

-/vmunix
-.br
-/dev/kmem
+/etc/passwd    to map user names to user ID's

 .SH SEE ALSO
 .SH SEE ALSO

-nice(1)
+getpriority(2), setpriority(2)

 .SH BUGS
 .SH BUGS

-If you make the nice very negative, then the process cannot be interrupted.
-To regain control you must put the nice back (e.g. to 0.)
+If you make the priority very negative,
+then the process cannot be interrupted.
+To regain control you make the priority greater than zero.
+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.