source: MondoRescue/trunk/mindi/rootfs/sbin/find-and-mount-cdrom@ 430

#!/bin/sh


TryToFindCDROM() {
# hda1 is there for testing
    LogIt "find-and-mount-cdrom --- starting"
    for device in /dev/hd? /dev/scd? /dev/rcd? /dev/sr? /dev/cd? /dev/ide/*/*/*/*/cd /dev/scsi/*/*/*/*/cd; do
        [ ! "$SECOND_TRY" ] && LogIt "Trying $device"
        if [ "`grep "using-cdstream yes" /tmp/mondo-restore.cfg`" ]; then
        pwd=`pwd`
        cd $GROOVY
            tar -zxf $device 2> /tmp/mount.log
            res=$?
        cd $pwd
            if [ "$res" -eq "0" ] ; then
        clear
               LogIt "Using cdstream as extended datadisk ($device). Good." 3
        echo "Using cdstrea as extd dsk." > /tmp/TAPEDEV-HAS-DATA-DISKS
                ln -sf $device /dev/cdrom
                exit 0
        fi
        else
            mount $device -t iso9660 -o ro /mnt/cdrom 2> /tmp/mount.log
        res=$?
        fi
    if [ "$res" -ne "0" ] ; then
        res=`cat /tmp/mount.log`
        if [ "$res" = "mount: No medium found" ] ; then
               [ ! "$SECOND_TRY" ] && LogIt "There is a CD-ROM drive at $device but no CD in it."
        else
               [ ! "$SECOND_TRY" ] && LogIt "It's not in $device; I'll keep looking"
        fi
        continue
    fi
    LogIt "$device has a CD-ROM in it"
    umount /mnt/cdrom
    ln -sf $device /dev/cdrom
    if [ "$?" -ne "0" ]; then
        LogIt "Unable to softlink $device to /dev/cdrom. That's weird."
        continue
    fi
        LogIt "CD-ROM found at $device"
    mount /mnt/cdrom
        if [ "$?" -ne "0" ] ; then
        LogIt "Cannot mount /dev/cdrom (type $format) (dev=$device)"
            continue
        elif [ ! -d "/mnt/cdrom/archives" ] ; then
        LogIt "There is a CD in $device but it's not a Mondo CD"
            continue
        else
        LogIt "$device is where the Mondo CD lives."
            which hdparm > /dev/null 2> /dev/null && hdparm -u1 -c3 -d1 $device
        return 0
    fi
    done
    LogIt "Failed to find CD-ROM"
    return 1
}


# -------------- main ------------

[ "$1" = "--second-try" ] && SECOND_TRY=yes
if [ ! "$GROOVY" ] ; then
    LogIt "I'm not groovy!"
    exit 1
fi

TryToFindCDROM
if [ "$?" -eq "0" ] ; then
    [ "$SECOND_TRY" ] && add="At 2nd attempt, " || add=""
    LogIt $add"CD-ROM found and mounted at $device" 3
    echo "$device" > /tmp/CDROM-LIVES-HERE
    LogIt "find-and-mount-cdrom --- leaving (0)"
    exit 0
fi
#mount /dev/fd0u1722 -t ext2 /mnt/floppy
[ "$1" = "--second-try" ] && exit 1; # don't try to mount floppy drive
if [ "`grep "using-cdstream yes" /tmp/mondo-restore.cfg`" ] ; then
    LogIt "Because you are using cdstream, I won't try to mount CD."
    exit 0
fi
mount /dev/fd0 -t ext2 -o ro /mnt/floppy 2> /dev/null
if [ "$?" -eq "0" ] ; then
    umount /mnt/floppy 2> /dev/null
    exit 1
else
    LogIt "Please go to another PC, mount this CD and copy the data disk images" 1
    LogIt "from the CD's /images directory to blank 1.44MB floppy disks. You should" 1
    LogIt "use something like 'dd if=/mnt/cdrom/images/mindi-data-1.img of=/dev/fd0'" 1
    LogIt "for the first data disk, mindi-data-2.img for the second, and so on." 1
    LogIt "(If you are already booting from a floppy, please ignore this message.)" 1
    exit 2
fi