#!/bin/sh
# boot-time init script for cryptmount
# RW Penney, August 2006

# Basic support for Linux Standard Base:
### BEGIN INIT INFO
# Provides:             cryptmount-early
# Required-Start:       $remote_fs
# Required-Stop:        $remote_fs
# Default-Start:        S
# Default-Stop:         0 6
# Short-Description:    setup encrypted devices at boot
# Description:          configure device-mapper targets for encrypted
#                       devices managed by cryptmount
### END INIT INFO

CM_EXE=@EXENAME@
DMPATH=/dev/mapper

CM_EARLYDV=""

# check whether cryptmount executable is usable:
test -x "${CM_EXE}" || exit 5

# read user-specified lists of filesystems to initialize:
if [ -f /etc/default/cryptmount ]; then
    . /etc/default/cryptmount
fi


configured() {
    # check if any of the targets needed at boot has been configured:
    for target in ${CM_EARLYDV}; do
        if [ -b "${DMPATH}/${target}" ]; then
            true
            return
        fi
    done
    false
}


dodevices() {
    case "$1" in
        start)  test -z "${CM_EARLYDV}" || ${CM_EXE} --prepare ${CM_EARLYDV}
            ;;
        stop)   test -z "${CM_BOOTDV}" || ${CM_EXE} --release ${CM_EARLYDV}
            ;;
    esac
}

doALL() {
    case "$1" in
        start)
            # Make sure that kernel device-mapper is available:
            modprobe -q -a dm-mod dm-crypt || true

            dodevices start
            ;;
        stop)
            dodevices stop
            ;;
    esac
}


case "$1" in
    start)
        if configured; then
            echo "cryptmount auto-devices seem to be already configured"
        else
            echo "Starting cryptmount early targets (hit shift/ctrl if short of entropy):"
            doALL start
        fi
        ;;
    stop)
        if configured; then
            echo "Stopping cryptmount early targets:"
            doALL stop
            ${CM_EXE} --safetynet || true
        fi
        ;;
    restart)
        if configured; then
            doALL stop
        fi
        doALL start
        ;;
    force-reload|reload)
        # nothing to do
        ;;
    status)
        if configured; then
            echo "cryptmount auto-devices are in use"
        else
            echo "cryptmount auto-devices do not appear to be in use"
            exit 3
        fi
        ;;
    *)
        echo "Usage: $0 " \
            " {start|stop|restart|reload|force-reload|status}" >&2
        exit 1
        ;;
esac

exit 0
