passadd

#!/bin/bash
# passadd

if [ -z "$PASSFILE" ]
then
    echo "PASSFILE doesn't exist"
    exit 1
fi

if [ $# -ne 1 ]
then
    echo "usage: passadd [name]"
    exit 1
else
    t=$(tempfile) || exit
    trap "shred -u -n 10 -z '$t'" EXIT
    gpg --no-for-your-eyes-only -o $t -d $PASSFILE 
    read -s -p "password to save: " passwd
    echo
    echo "$1:$passwd" >> $t
    gpg -o $PASSFILE -c $t
    shred -u -n 10 -z "$t"
    trap - EXIT
    exit
fi