Index: etc/defaults/rc.conf
===================================================================
RCS file: /home/cvs/FreeBSD/src/etc/defaults/rc.conf,v
retrieving revision 1.202
diff -u -r1.202 rc.conf
--- etc/defaults/rc.conf	23 Mar 2004 23:22:34 -0000	1.202
+++ etc/defaults/rc.conf	26 Mar 2004 21:31:47 -0000
@@ -473,6 +473,8 @@
 #jail_example_rootdir="/usr/jail/default"	# Jail's root directory
 #jail_example_hostname="default.domain.com"	# Jail's hostname
 #jail_example_ip="192.168.0.10"			# Jail's IP number
+#jail_example_pre_exec=""			# command to execute just
+						# before jailing.
 #jail_example_exec="/bin/sh /etc/rc"		# command to execute in jail
 #jail_example_devfs_enable="NO"			# mount devfs in the jail
 #jail_example_fdescfs_enable="NO"		# mount fdescfs in the jail
Index: etc/rc.d/jail
===================================================================
RCS file: /home/cvs/FreeBSD/src/etc/rc.d/jail,v
retrieving revision 1.14
diff -u -r1.14 jail
--- etc/rc.d/jail	8 Mar 2004 12:25:05 -0000	1.14
+++ etc/rc.d/jail	26 Mar 2004 22:44:21 -0000
@@ -33,6 +33,7 @@
 	jail_procdir="${jail_rootdir}/proc"
 	eval jail_hostname=\"\$jail_${_j}_hostname\"
 	eval jail_ip=\"\$jail_${_j}_ip\"
+	eval jail_pre_exec=\"\$jail_${_j}_pre_exec\"
 	eval jail_exec=\"\$jail_${_j}_exec\"
 	[ -z "${jail_exec}" ] && jail_exec="/bin/sh /etc/rc"
 
@@ -155,6 +156,7 @@
 				mount -t procfs proc "${jail_procdir}"
 			fi
 		fi
+		[ -n "${jail_pre_exec}" ] && ${jail_pre_exec}
 		_tmp_jail=/tmp/jail.$$
 		jail -i ${jail_rootdir} ${jail_hostname} \
 			${jail_ip} ${jail_exec} > ${_tmp_jail} 2>&1