X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=scripts%2Fdc-dlvr;h=935a8312d8527970c2bb435fc7b5c6bda15bb46f;hb=21fcd8a37c82c1ef654d402cf592f0c9d803aa26;hp=ca64505cd24213aa9dd902d7d85a1a2ee2b34db6;hpb=62f57b7545eedf6a781efb2f5269b0a38ef2cd4c;p=public-inbox.git

diff --git a/scripts/dc-dlvr b/scripts/dc-dlvr
index ca64505c..935a8312 100755
--- a/scripts/dc-dlvr
+++ b/scripts/dc-dlvr
@@ -1,15 +1,10 @@
 #!/bin/sh
-# Copyright (C) 2008-2013, Eric Wong <e@80x24.org>
-# License: GPLv3 or later <http://www.gnu.org/licenses/gpl-3.0.txt>
+# Copyright (C) 2008-2021 all contributors <meta@public-inbox.org>
+# License: GPL-3.0+ <http://www.gnu.org/licenses/gpl-3.0.txt>
 # This is installed as /etc/dc-dcvr on my system
 # to use with postfix main.cf: mailbox_command = /etc/dc-dlvr "$EXTENSION"
 DELIVER=/usr/lib/dovecot/deliver
-
-# my personal preference is to use a catchall account to avoid generating
-# backscatter, as invalid emails are usually spam
-case $USER in
-catchall) exec $DELIVER ;;
-esac
+CLAMDSCAN=clamdscan
 
 # change if your spamc/spamd listens elsewhere
 spamc='spamc'
@@ -23,19 +18,28 @@ trainham,) exec $spamc -L ham > /dev/null 2>&1 ;;
 esac
 
 TMPMSG=$(mktemp -t dc-dlvr.orig.$USER.XXXXXX || exit 1)
-rm_list=$TMPMSG
+CDMSG=$(mktemp -t dc-dlvr.orig.$USER.XXXXXX || exit 1)
+rm_list="$TMPMSG $CDMSG"
+
+cat >$CDMSG
+$CLAMDSCAN --quiet - <$CDMSG
+if test $? -eq 1
+then
+	$DELIVER -m INBOX.spam <$CDMSG
+	exec rm -f $rm_list
+fi
 
 # pre-filter, for infrequently read lists which do their own spam filtering:
 if test -r ~/.dc-dlvr.pre
 then
 	set -e
-	cat > $TMPMSG
+	mv -f $CDMSG $TMPMSG
 	DEFAULT_INBOX=$(. ~/.dc-dlvr.pre)
 	case $DEFAULT_INBOX in
 	'') exec rm -f $rm_list ;;
 	INBOX) ;; # do nothing
 	*)
-		$DELIVER -m $DEFAULT_INBOX < $TMPMSG
+		$DELIVER -m $DEFAULT_INBOX <$TMPMSG
 		exec rm -f $rm_list
 		;;
 	esac
@@ -43,9 +47,9 @@ then
 	rm_list="$rm_list $PREMSG"
 	set +e
 	mv -f $TMPMSG $PREMSG
-	$spamc -E --headers < $PREMSG > $TMPMSG
+	$spamc -E --headers <$PREMSG >$TMPMSG
 else
-	$spamc -E --headers > $TMPMSG
+	$spamc -E --headers <$CDMSG >$TMPMSG
 fi
 err=$?
 
@@ -53,14 +57,14 @@ err=$?
 set -e
 
 case $err in
-1) $DELIVER -m INBOX.spam < $TMPMSG ;;
+1) $DELIVER -m INBOX.spam <$TMPMSG ;;
 *)
 	# users may override normal delivery and have it go elsewhere
 	if test -r ~/.dc-dlvr.rc
 	then
 		. ~/.dc-dlvr.rc
 	else
-		$DELIVER -m INBOX < $TMPMSG
+		$DELIVER -m INBOX <$TMPMSG
 	fi
 	;;
 esac