source: MondoRescue/trunk/mindi/rootfs/sbin/insist-on-cd @ 30

#!/bin/sh



InsistOnCD() {
    local the_next_cd cd_inserted_correctly line present_cd
    the_next_cd=$1

    if [ "`ThisCDsNumber`" = "$the_next_cd" ] ; then
#        echo "CD #$the_next_cd is already inserted. Proceeding."
        return 0
    fi

    cd_inserted_correctly="no"

# -- can't do w/o supermount until/unless softlinks from /usr/share/mondo
# -- to /mnt/cdrom/usr/share/mondo are cut (I think).. but we'll see.. :)
#    umount /mnt/cdrom; # to see if we can do without supermount :)
#    if [ "$?" -ne "0" ] ; then
#   LogIt "To paraphrase Celine Dion, 'I can't li-i-i-ive, if living is without supermount.'" 1
#    fi
    while [ "$cd_inserted_correctly" != "yes" ] ; do
    umount /mnt/cdrom
        eject /dev/cdrom
    echo -n "Please insert CD #$the_next_cd in this set, then press ENTER."
    read line
    mount /mnt/cdrom
    ls /mnt/cdrom/archives &> /tmp/try_to_read_cd.txt
    if [ "$?" -ne "0" ] ; then
        echo "Bad CD? No CD? I can't find /mnt/cdrom/archives. \
Please try again."
        elif [ "`ThisCDsNumber`" != "$the_next_cd" ] ; then
            echo "This CD is #`ThisCDsNumber`; \
I want #$the_next_cd. Try again."
    else
        echo -e -n "Thankyou. "
        cd_inserted_correctly="yes"
    fi
    done
    LogIt "Now processing CD#$the_next_cd." 1
}


ThisCDsNumber() {
    if [ ! -f "/mnt/cdrom/archives/THIS-CD-NUMBER" ] ; then
        echo "(absent)"
    else
        cat /mnt/cdrom/archives/THIS-CD-NUMBER
    fi
}

InsistOnCD $1
exit $?