--- a/s4-funcs.sh	Fri Apr 17 18:15:40 2020 +0900
+++ b/s4-funcs.sh	Fri Apr 17 18:17:26 2020 +0900
@@ -13,6 +13,7 @@
 dbdir=${DBDIR:-db}
 tmpfiles=""
 db=${DB:-$dbdir/cgi.sq3}
+workdb=$dbdir/tmpdata.sq3
 listentlimit=${LISTENTLIMIT:-30}
 admin=${ADMIN:-hostmaster@example.org}
 noreply=${NOREPLY:-noreply@example.org}
@@ -1145,6 +1146,68 @@
   (_m4 -D_RCPT_="${SMAIL_TO:-$rcpt}" -D_SUBJ_="\`$subj'" -D_FROM_="$from" $msgdir/mail-header.m4
    cat $3 | nkf -jd ) | sendmail -f $admin $rcpt
 }
+smail_queue_flush() {
+  # $1=timelimit
+  timelimit=`sq $workdb "SELECT datetime('now', 'localtime', '-1 minutes');"`
+    err timelimit="$timelimit" rowid=$rowid
+  err r===="$(sq $workdb <<-EOF
+	SELECT rowid FROM smailq
+	       GROUP BY rcpts, subj
+	       HAVING min(time) < '$timelimit';
+	EOF
+  )"
+  rowids=$(sq $workdb <<-EOF
+	SELECT rowid FROM smailq
+	       GROUP BY rcpts, subj
+	       HAVING min(time) < '$timelimit';
+	EOF
+  )
+  for rid in $rowids; do
+    sq $workdb \
+       "SELECT hex(rcpts),hex(subj) FROM smailq WHERE rowid in ($rid)" \
+      | if IFS='|' read hexr hexs; then
+      err "hexrcpt=[$hexr] hexsubj=[$hexs]"
+      rcpt=`echo "$hexr"|unhexize`
+      subj=`echo "$hexs"|unhexize`
+      
+      # err ROWID==$rowid "sql=<<SELECT hex(rcpts),hex(subj) FROM smailq WHERE rowid=$rowid;>>"
+      err "rcpt=[$rcpt] subj=[$subj]"
+      if sq $workdb <<-EOF | smail "$rcpt" "$subj"
+	.separator "\n" "------------------\n\n"
+	SELECT time, text FROM smailq
+	       WHERE rcpts=(SELECT rcpts FROM smailq WHERE rowid=$rid)
+	         AND subj=(SELECT subj FROM smailq WHERE rowid=$rid)
+	       ORDER by time;
+	EOF
+      then
+	echo rowid=$rid
+	cat <<-EOF | sq $workdb 
+	DELETE FROM smailq
+	       WHERE rcpts=(SELECT rcpts FROM smailq WHERE rowid=$rid)
+	         AND subj=(SELECT subj FROM smailq WHERE rowid=$rid);
+	EOF
+      fi
+    fi
+  done
+}
+smail_queue() {
+  # $1=Rcpts, $@=subj
+  now=`sq $workdb "SELECT datetime('now', 'localtime');"`
+  if [ $? -eq 0 ]; then
+    rcpts="X'"`echo "$1"|hexize`"'"
+    subj="X'"`echo "$2"|hexize`"'"
+    text="X'"`cat | hexize`"'"
+    err "rcpts=[$rcpts] s=[$subj] t=[$text]"
+    mintime=$(tee /tmp/sql  <<-EOF | sq $workdb
+	CREATE TABLE IF NOT EXISTS smailq(rcpts, subj, text, time);
+	INSERT INTO smailq VALUES($rcpts, $subj, $text, '$now');
+	SELECT min(time) FROM smailq WHERE rcpts=$rcpts AND subj=$subj;
+	EOF
+    )
+    err flush_queue=$mintime
+    smail_queue_flush
+  fi
+}
 setviastring() {
   table=$1
   oifs="$IFS"
@@ -3082,7 +3145,7 @@
 	end;"
     action="から脱退しました。"
   fi
-  smail "$(collectemail `getgroupadmins $1`)" "Member change of $1"<<-EOF
+  smail_queue "$(collectemail `getgroupadmins $1`)" "Member change of $1"<<-EOF
 	$url?grp+$grid
     	$user (`gecos $user`)さんが
 	グループ $1