A simple rc.d jail patch to enable priority

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Hello,

I have written this tiny little patch to the jail rc.d script, which
allows user to set jail nice value. It doesn't change any default
behaviour.

Can that make it to the trees?
Patch attached.

-- 
  Jan Srzednicki  ::  http://wrzask.pl/
  "Remember, remember, the fifth of November"
                                     -- V for Vendetta


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--- /etc/rc.d/jail	2007-06-06 16:42:01.000000000 +0200
+++ /srv/home/winfried/jail.new	2008-02-24 17:26:42.000000000 +0100
@@ -69,6 +69,7 @@
 	[ -z "${_flags}" ] && _flags="-l -U root"
 	eval _consolelog=\"\${jail_${_j}_consolelog:-${jail_consolelog}}\"
 	[ -z "${_consolelog}" ] && _consolelog="/var/log/jail_${_j}_console.log"
+	eval _nice=\"\${jail_${_j}_nice:-${jail_nice}}\"
 
 	# Debugging aid
 	#
@@ -89,6 +90,7 @@
 	debug "$_j exec stop: $_exec_stop"
 	debug "$_j flags: $_flags"
 	debug "$_j consolelog: $_consolelog"
+	[ -n "${_nice}" ] && debug "$_j nice: $_nice"
 
 	if [ -z "${_hostname}" ]; then
 		err 3 "$name: No hostname has been defined for ${_j}"
@@ -322,7 +324,14 @@
 			fi
 		fi
 		_tmp_jail=${_tmp_dir}/jail.$$
-		eval jail ${_flags} -i ${_rootdir} ${_hostname} \
+
+		if [ -z "${_nice}" ]; then 
+			_nice_cmd=""
+		else
+			_nice_cmd="nice -n${_nice}"
+		fi
+
+		eval ${_nice_cmd} jail ${_flags} -i ${_rootdir} ${_hostname} \
 			${_ip} ${_exec_start} > ${_tmp_jail} 2>&1
 			if [ "$?" -eq 0 ] ; then
 				echo -n " $_hostname"

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