Possibility to disable (not start) zfs at bootup.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #1402

etc/init.d/zfs.fedora.in

@@ -25,6 +25,11 @@
 
 export PATH=/usr/local/sbin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin
 
+if [ -z "$init" ]; then
+    # Not interactive
+    grep -Eqi 'zfs=off|zfs=no' /proc/cmdline && exit 3
+fi
+
 # Source function library & LSB routines
 . /etc/rc.d/init.d/functions
 

etc/init.d/zfs.gentoo.in

@@ -3,6 +3,11 @@
 # Released under the 2-clause BSD license.
 # $Header: /var/cvsroot/gentoo-x86/sys-fs/zfs/files/zfs,v 0.9 2011/04/30 10:13:43 devsk Exp $
 
+if [ -z "$init" ]; then
+    # Not interactive
+    grep -Eqi 'zfs=off|zfs=no' /proc/cmdline && exit 3
+fi
+
 depend()
 {
 	# bootmisc will log to /var which may be a different zfs than root.

etc/init.d/zfs.lsb.in

@@ -36,6 +36,11 @@ ZPOOL_CACHE="@sysconfdir@/zfs/zpool.cache"
 [ -x "$ZPOOL" ] || exit 1
 [ -x "$ZFS" ] || exit 2
 
+if [ -z "$init" ]; then
+    # Not interactive
+    grep -Eqi 'zfs=off|zfs=no' /proc/cmdline && exit 3
+fi
+
 start()
 {
 	[ -f "$LOCKFILE" ] && return 3

etc/init.d/zfs.lunar.in

@@ -14,6 +14,11 @@ ZFS="@sbindir@/zfs"
 ZPOOL="@sbindir@/zpool"
 ZPOOL_CACHE="@sysconfdir@/zfs/zpool.cache"
 
+if [ -z "$init" ]; then
+    # Not interactive
+    grep -Eqi 'zfs=off|zfs=no' /proc/cmdline && exit 3
+fi
+
 case $1 in
   start)  echo "$1ing ZFS filesystems"
 

etc/init.d/zfs.redhat.in

@@ -25,6 +25,11 @@
 
 export PATH=/usr/local/sbin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin
 
+if [ -z "$init" ]; then
+    # Not interactive
+    grep -Eqi 'zfs=off|zfs=no' /proc/cmdline && exit 3
+fi
+
 # Source function library & LSB routines
 . /etc/rc.d/init.d/functions