Script: To ease mounting iso-image files.

[©TriMoon®]

Here is a little script i wrote to aid in everyday use of iso-images.
To use this script you need these packages:
- fuse-utils
- fuseiso

If you dont have them installed yet you should run these commands according to which you dont have:
sudo apt-get install fuse-utils
sudo apt-get install fuseiso


Don´t forget to give the script execute permissions after you have downloaded the script, see attachment
chmod +x iso_fuse.sh

To see the usage just run the script without any arguments.
Feel free to adjust the defaults under #Define our defaults

For those that just like to see the inners without downloading here ıs the contents:
#!/bin/bash
#Copyrights: (C)2007+ TriMoon inc.
#Author: TriMoon <tripple.moon[at]yahoo.com>
#
# This work is licensed under the Creative Commons Attribution-Share Alike 3.0 License.
# To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/3.0/
# or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.

#Define our defaults
readonly mountoptions="ro,allow_other"
readonly mountpoint="/mnt/iso"

##### No need to edit beyond this point.
readonly version="1.00"
readonly scriptname="`basename $0`"
isofile=""

#Script help
function HELP () {
cat <<-TEXT >&2
$scriptname version $version

1) Getting help or info about $scriptname :
$scriptname -h|--help Print this message

2) Running $scriptname :
$scriptname [iso filename]
When invoked without an argument, the currently mounted iso-image is unmounted.

3) Defaults used by $scriptname :
mount-point = $mountpoint
mount-options = $mountoptions

Known bug: does not recognize as iso when using "~/" at start of iso-filename.
TEXT
}

#Check if mountpoint already in use.
function CheckInUse () {
local RetVal=`mount | grep -c "$mountpoint"`
if [ $RetVal -gt 0 ]; then
UnMount
fi
return $RetVal
}

#Get the fullpath of the ISO-image
function GetFullPath () {
local is_absolutepath

#Checks to see if an absolute path was supplied.
is_absolutepath=`echo "$1" | grep -c ^[~/\|/]`

#Add the current working directory onto the isofile if it had no absolute path
if [ $is_absolutepath -eq 0 ]; then
isofile=`echo "$PWD/$1"`
else
#Replace "~" with "$HOME"
isofile=`echo "$1" | sed 's/^~/$HOME/'`
fi
return
}

#Check to see if the argument is an ISO-file
function CheckISO () {
local RetVal=`file "$isofile" | grep -c "ISO 9660"`
if [ $RetVal -eq 0 ]; then
echo "The file/image you try to mount is not an ´ISO 9660´ !"
exit
fi
return $RetVal
}

#Unmount the currently mounted iso-image
function UnMount () {
local RetVal
echo "$scriptname: Unmounting previous iso"
RetVal=`sudo fusermount -u "$mountpoint"`
if [ $RetVal -eq 0 ]; then
echo "$scriptname: Success."
else
echo "$scriptname: Failed !"
fi
return $RetVal
}

#Mount the requested ISO-image
function Mount () {
local RetVal
echo "$scriptname: Mounting ´$isofile´"
echo "$scriptname: on ´$mountpoint´"
echo "$scriptname: with options: $mountoptions"
if [ -d $mountpoint ]; then
RetVal=`sudo fuseiso "$isofile" "$mountpoint" -o "$mountoptions"`
if [ $RetVal -eq 0 ]; then
echo "$scriptname: Success."
else
echo "$scriptname: Failed !"
fi
else
echo "Mount-point '$mountpoint' does not exist, aborting !"
exit
fi
return $RetVal
}

#Parse command line.
if [ $# -eq 0 ]; then
CheckInUse
if [ $? -gt 0 ]; then
UnMount
else
HELP
fi
else
case "$1" in
-h | --help)
clear
HELP
exit 0
;;
*)
#Unmount previous iso if needed.
CheckInUse
GetFullPath "$1"
CheckISO
#Mount the requested ISO-image
Mount
;;
esac
fi
exit

[hraposo]

When I type:
$sh iso_fuse.sh

Give me that message:

$iso_fuse.sh: 19: Syntax error: "(" unexpected

How can I solve it?