claws-mail/tools/gpg-sign-syl

#!/bin/sh
TMPFILE=`mktemp $HOME/.iXXXXXX` || exit 1
TMPFILE2=`mktemp $HOME/.oXXXXXX` || exit 1
cat - > $TMPFILE
xterm -T "GnuPG - Message Signing" -geometry 80x8 -e gpg --clearsign --yes -o $TMPFILE2 $TMPFILE
cat $TMPFILE2
rm $TMPFILE
rm $TMPFILE2