#!/bin/sh
# Create a ramfs drive to store
# secure password temporarily
# Terribly Linux specific

targetdir=/tmp/ram_drive
passfile=app_pass.txt
my_user=$SUDO_USER

check_mount() {
    if grep "$targetdir ramfs" /etc/mtab >/dev/null
    then
        # move on quietly.
        :
    else
        mkdir -p $targetdir
        mount -t ramfs none $targetdir
        # Make sure its really there now
        if grep "$targetdir ramfs" /etc/mtab >/dev/null
        then
            :
        else
            echo "$0: failed to mount ramdisk" 1>&2
            exit 1
        fi
    fi
}
ask_for_ad_pass() {
    if [ -f $targetdir/$passfile ];
    then
        # exit silently
        exit 0;
    fi
    old_settings=$(stty -g)
    stty -echo
    echo -n "Password: "
    read pass
    echo $pass > $targetdir/$passfile
    stty $old_settings
    chown "${my_user}" $targetdir/$passfile
    chmod 600 $targetdir/$passfile
    echo
    echo "Stored Password on RAM Drive"
}

check_mount
ask_for_pass