Here we go

Makefile

@@ -0,0 +1,9 @@
+all:
+
+install:
+	sed s:EZJAIL_PREFIX:${PREFIX}: ezjail > ${PREFIX}/etc/rc.d/ezjail
+	chmod 755 ${PREFIX}/etc/rc.d/ezjail
+	sed s:EZJAIL_PREFIX:${PREFIX}: ezjail-admin > ${PREFIX}/bin/ezjail-admin
+	chmod 755 ${PREFIX}/bin/ezjail-admin
+	cp -p ezjail.conf.sample ${PREFIX}/etc/
+	mkdir -p ${PREFIX}/etc/ezjail/

ezjail

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+#/bin/sh
+
+# $FreeBSD$
+#
+# PROVIDE: ezjail
+#
+# Note: Add the following lines to $PREFIX/etc/rc.conf to enable ezjail,
+#
+#ezjail_enable="YES"
+#
+# Please do not change this file, configure in $PREFIX/etc/ezjail.conf
+
+# ugly: this variable will be set on port install time
+ezjail_prefix=EZJAIL_PREFIX
+
+. /etc/rc.subr
+
+name=ezjail
+ezjail_enable=${ezjail_enable:-"NO"}
+rcvar=`set_rcvar`
+
+start_cmd="do_start"
+stop_cmd="do_stop"
+
+do_start()
+{
+  jail_enable=${ezjail_enable}
+  jail_list=`ls ${ezjail_prefix}/etc/ezjail/`
+  for jail in $jail_list; do . ${ezjail_prefix}/etc/ezjail/${jail}; done
+  sh /etc/rc.d/jail start $*
+}
+
+do_stop()
+{
+  jail_enable=${ezjail_enable}
+  jail_list=`ls ${ezjail_prefix}/etc/ezjail/`
+  for jail in $jail_list; do . ${ezjail_prefix}/etc/ezjail/${jail}; done
+  sh /etc/rc.d/jail stop $*
+}
+
+load_rc_config $name
+run_rc_command $*

ezjail-admin

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+#!/bin/sh
+
+# ugly: this variable is set during port install time
+ezjail_prefix=EZJAIL_PREFIX
+
+if [ "0" != "`id -u`" ]; then
+  echo "Retry as root"; exit 1;
+fi
+
+exit
+if [ -f ${ezjail_prefix}/etc/ezjail.conf ]; then
+  . ${ezjail_prefix}/etc/ezjail.conf;
+fi
+
+if [ -z "$1" ];
+  then echo "Syntax: $0 [create|delete|list|update] {params}"; exit;
+fi
+
+case "$1" in
+create)
+  mkdir ${newjail_root} && cd ${ezjail_jailtemplate} \
+        && find * | cpio -p -v ${newjail_root}
+  ;;
+delete)
+
+  ;;
+list)
+
+  ;;
+update)
+
+  if [ ! -d ${ezjail_sourcetree} ]; then
+    echo "Cannot find your copy of the FreeBSD source tree in $ezjail_sourcetree."; exit 1;
+  fi
+
+  cd ${ezjail_sourcetree}
+  rm -r ${ezjail_jailfull}; mkdir -p ${ezjail_jailfull}
+  make world DESTDIR=${ezjail_jailfull}
+  make distribution DESTDIR=${ezjail_jailfull}
+
+  cd ${ezjail_jailfull}
+  mkdir -p ${ezjail_jailbase}
+  for a in bin sbin usr/bin usr/include usr/lib usr/libexec usr/sbin usr/src usr/share; do
+    find ${a} | cpio -d -p -v ${ezjail_jailbase};
+    chflags -R noschg ${a}; rm -r ${a}; ln -s /basejail/${a} ${a}
+  done
+  mkdir basejail
+
+  if [ -d ${ezjail_jailtemplate} ]; then
+    mv ${ezjail_jailtemplate} ${ezjail_jailtemplate}_old
+  fi
+  mv ${ezjail_jailfull} ${ezjail_jailtemplate}
+
+  ;;
+esac

ezjail.conf.sample

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+# ezjail.conf - Example file, see ezjail(x)
+#
+# Note: If you alter some of those variables AFTER creating your first
+# jail, you may have to adapt /etc/fstab.* and ${PREFIX}/etc/ezjail/* by
+# hand
+
+# Location of jail root directories
+#
+# Note: If you habe spread your jails to multiple locations, use softlinks 
+# to collect them in this directory
+ezjail_jaildir=/usr/jails/
+
+# Location of the tiny skeleton jail template
+ezjail_jailtemplate=$ezjail_jaildir/newjail
+
+# Location of the huge base jail
+ezjail_jailbase=$ezjail_jaildir/basejail
+
+# Location of your copy of FreeBSD's source tree
+ezjail_sourcetree=/usr/src
+
+# Default options for newly created jails
+#
+# Note: Be VERY careful about disabling ezjail_mount_enable. Mounting 
+# basejail via nullfs depends on this. You will have to find other
+# ways to provide your jail with essential system files
+ezjail_mount_enable="YES"
+ezjail_devfs_enable="YES"
+ezjail_devfs_ruleset="devfsrules_jail"
+ezjail_procfs_enable="YES"
+ezjail_fdescfs_enable="YES"
+