diff --git a/src/lib/svc/method/zfs-auto-snapshot b/src/lib/svc/method/zfs-auto-snapshot
index 1679330..bf2023c 100755
--- a/src/lib/svc/method/zfs-auto-snapshot
+++ b/src/lib/svc/method/zfs-auto-snapshot
@@ -779,7 +779,7 @@ function narrow_recursive_filesystems {
 
 function can_recursive_snapshot {
         typeset ds=$1
-        if egrep "$ds/"\|"$ds   " $EXCLUDE > /dev/null; then
+        if egrep "$ds/"\|"$ds	" $EXCLUDE > /dev/null; then
                 # we can't recursively snapshot $ds because
                 # it's excluded or is in the path to an excluded dataset
                 return 1
@@ -790,7 +790,7 @@ function can_recursive_snapshot {
 
 function is_excluded {
         typeset ds=$1
-        if egrep "$ds   " $EXCLUDE > /dev/null ; then
+        if egrep "$ds	" $EXCLUDE > /dev/null ; then
                 return 0
         else
                 return 1
@@ -879,8 +879,8 @@ function auto_include {
 		POOLS=$(zpool list -H -o name)
 		for pool in $POOLS ; do
 			if ! zpool status -x $pool | grep "state: UNAVAIL" > /dev/null ; then
-				SNAPALL=$(zfs get com.sun:auto-snapshot $pool)
-				SNAPLABEL=$(zfs get com.sun:auto-snapshot:$LABEL $pool)
+				SNAPALL=$(zfs get -H -o value com.sun:auto-snapshot $pool)
+				SNAPLABEL=$(zfs get -H -o value com.sun:auto-snapshot:$LABEL $pool)
 				SNAP=$SNAPALL$SNAPLABEL
 				case $SNAP in
 				*true | true*)
diff --git a/src/postinstall b/src/postinstall
index a1a4d07..f4e32e7 100755
--- a/src/postinstall
+++ b/src/postinstall
@@ -1,4 +1,4 @@
-#!/bin/ksh
+#!/bin/sh
 
 #
 # CDDL HEADER START
@@ -32,7 +32,7 @@
 # Check if the first argument is 0, settting our return
 # variable to an error otherwise
 #
-function check_error {
+check_error() {
 	RETURN_CODE=$1
 	ERROR="$2"
         if [ "$RETURN_CODE" -ne 0 ] ; then
@@ -40,32 +40,28 @@ function check_error {
         fi
 }
 
-function user_exists {
-        typeset USER=$1
-        if /usr/bin/grep ^$USER: $BASEDIR/etc/passwd > /dev/null ; then
-                return 0
-        else
-                return 1
-        fi
+user_exists() {
+        USER=$1
+	/usr/bin/grep "^$USER:" $BASEDIR/etc/passwd > /dev/null
+	return $?
 }
 
-function auth_exists {
-	typeset AUTH=$1
-	if /usr/bin/grep ^$AUTH: $BASEDIR/etc/security/auth_attr > /dev/null ; then
-		return 0
-	else
-		return 1
-	fi
+auth_exists() {
+	AUTH=$1
+	/usr/bin/grep "^$AUTH:" $BASEDIR/etc/security/auth_attr > /dev/null
+	return $?
 }
 
 # add our authorization
-if ! auth_exists solaris.smf.manage.zfs-auto-snapshot; then
+auth_exists solaris.smf.manage.zfs-auto-snapshot
+if [ $? -ne 0 ] ; then
 	echo "solaris.smf.manage.zfs-auto-snapshot:::Manage the ZFS Automatic Snapshot Service::" \
 	>> /etc/security/auth_attr
 fi
 
 # add the zfssnap role - probably only works on a local system :-(
-if ! user_exists zfssnap; then
+user_exists zfssnap
+if [ $? -ne 0 ] ; then
 	/usr/sbin/roleadd -d /export/home/zfssnap -c "ZFS Automatic Snapshots role" \
 	-P "ZFS File System Management" \
 	-A solaris.smf.manage.zfs-auto-snapshot -m zfssnap