Blah, etc. Blah

Update: The latest version is here.

I was reading some Sun blogs tonight and found the other Jonathan's blog which reminded me of a script I wrote a long time ago.  This script does basically the same thing, but has a nice mnemonic name and does a little input checking for my own sanity.  Also, I must confess to a little bit of cleanup in the code since I'll be laying it out here on the web.

I hope this is useful to you. 

#!/bin/ksh

########################################################################################
#
# Program : mntiso
#
# Purpose : Mount an ISO image so we don't need to burn a CD or DVD to view the content.
#
# Author  : Dale Sears
#
# Version : 0   (Initial Version)
#
# Notes   : I think this script could use a few more features.  Here are some ideas 
#           that I didn't bother to implement:
#
#           It's rather root-centric in the defaults...  There *are* other users, and
#           maybe they don't have root access to mkdir /iso
#
#           What if I wanted /iso/image1.iso AND /iso/image2.iso mounted at the same time
#           for diffs or some other purpose?  I could mount things like so:
#
#                ~/iso/image1.iso/
#                ~/iso/image2.iso/
#
#           Check for spaces in filename?  It could happen, and it would break
#           my lame script.
#
#           Use getopts:
#   
#             -f   Force the mount by unmounting what is mounted on MOUNTPOINT.
#             -h   Usage.
#             -?   Usage.
#             -m   Set the mount point different from the default.
#
#           I probably could have implemented a few of these instead of writing
#           all of this...
#
#######################################################################################


MOUNTPOINT=/iso

usage() {
        echo
        echo "Usage: "
        echo "       $0 /the/fully/qualified/path.iso"
        echo
}


######################################################################
# How many args?
######################################################################
if [ $# -ne 1 ]
then
        usage; exit 1
fi


######################################################################
# Check for leading / on the ISO arg (needed by lofiadm):
######################################################################
case "$1" in

        /* ) ISO="$1"
             break
             ;;

         * ) usage
             exit 1
             ;;
esac


######################################################################
# Remove possibly existing lofi device for the given ISO:
######################################################################
/usr/sbin/lofiadm -d "$ISO" 2> /dev/null


######################################################################
# Add lofi device for the ISO:
######################################################################
LOFIDEVICE=`/usr/sbin/lofiadm -a "$ISO" 2> /dev/null`

if [ -z "$LOFIDEVICE" ] 
then
        echo 
        echo 'Uh, oh... : No lofi Device.'
        echo 
        echo "Perhaps $ISO is already mounted?"
        echo 
        echo "To unmount and try again, use this:"
        echo 
        echo "   umount $MOUNTPOINT; $0 $ISO"
        echo 
        exit 2
fi


######################################################################
# Check for $MOUNTPOINT and create as needed:
######################################################################
if [ ! -d "$MOUNTPOINT" ]
then
        /bin/mkdir -m 555 "$MOUNTPOINT"
fi


######################################################################
# We've passed enough tests, let's try to mount the ISO and 'mount'
# will complain if $MOUNTPOINT is a file or is busy:
######################################################################
/sbin/mount -F hsfs -o ro $LOFIDEVICE $MOUNTPOINT