conf/98758: Templatize 'jail_fstab' in /etc/rc.d/jail

[skv at FreeBSD.org]

>Number:         98758
>Category:       conf
>Synopsis:       Templatize 'jail_fstab' in /etc/rc.d/jail
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Fri Jun 09 16:30:07 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Sergey Skvortsov
>Release:        FreeBSD 6.1-STABLE i386
>Organization:
<Organization of PR author (multiple lines)>
>Environment:

>Description:

Allow define template for jail's fstab.

>How-To-Repeat:

/etc/rc.conf.d/jail:
jail_fstab="/etc/fstab.jail"            # TEMPLATE
jail_list="host1 host2"

jail_host1_rootdir="/data/jails/host1"
jail_host2_rootdir="/data/jails/host2"

/etc/fstab.jail:
# Device        Mountpoint              FStype  Options         Dump    Pass#
/usr/ports      %%JAIL_ROOT%%/usr/ports nullfs  rw              0       0

Mounts will be maded accordingly to the template:

/usr/ports on /data/jails/host1/usr/ports (nullfs, local)
/usr/ports on /data/jails/host2/usr/ports (nullfs, local)

>Fix:

--- jail.orig	Fri Jun  9 20:04:50 2006
+++ jail	Fri Jun  9 20:08:22 2006
@@ -150,7 +150,8 @@
 	fi
 	if checkyesno _mount; then
 		[ -f "${_fstab}" ] || warn "${_fstab} does not exist"
-		umount -a -F "${_fstab}" >/dev/null 2>&1
+		sed -e "s=%%JAIL_ROOT%%=${_rootdir}=" "${_fstab}" | \
+			umount -a -F /dev/fd/0 >/dev/null 2>&1
 	fi
 }
 
@@ -183,7 +184,8 @@
 			if [ ! -f "${_fstab}" ]; then
 				err 3 "$name: ${_fstab} does not exist"
 			fi
-			mount -a -F "${_fstab}"
+			sed -e "s=%%JAIL_ROOT%%=${_rootdir}=" "${_fstab}" | \
+				mount -a -F /dev/fd/0
 		fi
 		if checkyesno _devfs; then
 			# If devfs is already mounted here, skip it.
>Release-Note:
>Audit-Trail:
>Unformatted: