--- a/s4-blog.sh	Fri Jun 23 23:23:40 2017 +0859
+++ b/s4-blog.sh	Sat Jun 24 08:00:56 2017 +0859
@@ -133,7 +133,7 @@
   if ! $iswritable; then
     blogowner=`getvalbyid blog owner "$2"`
     # err blogowner=$blogowner
-    if isgroup $blogowner; then
+    if isgroup "$blogowner"; then
       regmode=`getgroupattr $blogowner regmode`
       # err regmode=$regmode
       if [ x"$regmode" = x"moderated" ]; then
@@ -522,7 +522,7 @@
 lshandoutsub() {
   # $1=owner $2=rowid of blog &optional $3=temp_table name
   qgname=`sqlquote "$1"`
-  if isgroup $1; then
+  if isgroup "$1"; then
     sample="(select user from grp_mem where gname=$qgname)"
   else
     sample="(select distinct author as user from arts)"
@@ -794,7 +794,7 @@
     owner=`getpar owner`
   fi
   err blog-add: \$1=$1 rowid=$rowid owner=$owner
-  if isgroup $owner; then
+  if isgroup "$owner"; then
     groupmode=1 listing=$owner guide="[${owner}]" GF_OWNER=$owner
   else
     usermode=1 listing=$user guide="[個人]"