conf/92523: [patch] allow rc scripts to kill process after a timeout

[Sam Lawrance]

>Number:         92523
>Category:       conf
>Synopsis:       [patch] allow rc scripts to kill process after a timeout
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jan 30 04:50:02 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Sam Lawrance
>Release:        FreeBSD 6.0-STABLE i386
>Organization:
>Environment:
System: FreeBSD freefall.freebsd.org 6.0-STABLE FreeBSD 6.0-STABLE #0: Sat Dec 10 03:18:20 UTC 2005 kensmith at freefall.freebsd.org:/usr/obj/usr/src/sys/FREEFALL i386


>Description:
	Services stopped with a new style rc script wait indefinitely for the
process to die (using the default behaviour).  For some services which become
wedged sometimes and don't respond to a TERM signal, it would be useful to
be able to kill the process after a timeout.

>How-To-Repeat:
>Fix:

	http://people.freebsd.org/~lawrance/patch-rc.subr

This patch adds the wait_max_for_pids function.  It is similar to wait_for_pids
but the first argument is a timeout which specifies the maximum amount of time
to wait.

The default stop sequence is then changed to check the ${name}_stop_timeout
variable.  If it is set, the script will call wait_max_for_pids and the process
will be killed after the timeout.

If ${name}_stop_timeout is unset it the script will use wait_for_pids (ie behaviour
unchanged).

>Release-Note:
>Audit-Trail:
>Unformatted: