Check file type command?

[SpinningAround]

I'm working on a script to mount iso or img file, by combining these two
http://ubuntuforums.org/showpost.php...20&postcount=2
http://www.ubuntugeek.com/mount-isos...-nautilus.html

Since it feel slightly unnecessary to create two script, do i wonder how I can determine if the file is img, iso or neither?

[-humanaut-]

ls -F *

*=File location

Will list the file extension not sure if thats what your looking for or not?

[mali2297]

The easiest would be to use the file extension. A simple script can look like this:

#!/bin/sh

if [ -f $1 ]; then
  case $1 in
    *.img) mount -t udf -o loop $1 /media/temp ;;
    *.iso) mount -t iso9660 -o loop $1 /media/temp ;;
    *) echo "Unrecognized file" ;;
  esac
fi

It tests that the command line argument is an existing file and then checks if the file name ends with .img or .iso or just anything.

[sisco311]

Use the file command:

file -b path/to/file

I didn't test it, but something like this should work:

FILE=path/to/file
ISO="ISO 9660 CD-ROM filesystem data 'CDROM                          ' (bootable)"
IMG="output of the file command for an img file"
TYPE="$(file -b "$FILE")"

if [ "$TYPE"=="$ISO" ]; then 
  ...
elif [ "$TYPE"=="$IMG"]; then 
  ...
else 
  ...
fi

[SpinningAround]

I tried using ls -F /path/to/file but it only return the same. file -b works better it return following for a img file. I think it can work if it's possible to remove the 'Title' part.

# UDF filesystem data (version 1.5) 'Title'

[mali2297]

I tried using ls -F /path/to/file but it only return the same. file -b works better it return following for a img file. I think it can work if it's possible to remove the 'Title' part.

# UDF filesystem data (version 1.5) 'Title'

You can extract the first (say) three characters with cut:

file -b path/to/file | cut -c1-3

This should then give you either 'UDF' or 'ISO'.

[SpinningAround]

Thanks for all the answers, I'm almost got the script working but there is some problem regarding '$*'. It return the absolute path to the file instead of only the file name.

#!/bin/bash
#
# nautilus-mount-iso

gksudo -u root -k /bin/echo "Enter your password for root terminal access"
zenity --info --text "TEST /media/$*/"
TYPE = "$(file "$*" | cut -c 3-6)"
if [-d /media/"$*" ]; then
    if [ zenity --question --title "ISO Mounter" --text "Unmount $*?" ]
        sudo umount "$*" 
        zenity --info --text "Successfully unmounted /media/$*/"
        sudo rmdir "/media/$*/"
        exit 0
    else
        exit 1
    fi
else
    sudo mkdir /media/"$*"
    if [ "$TYPE"==ISO ]; then
        if [ sudo mount -o loop -t iso9660 "$*" /media/"$*" ]; then
            zenity --info --title "ISO Mounter" --text "$* Successfully Mounted."
            exit 0
        else
            sudo rmdir /media/"$*"
            zenity --error --title "ISO Mounter" --text "Cannot mount $*!"
            exit 1
        fi
    elif [ "$TYPE"==UDF ]; then
        if [ sudo mount -t udf -o loop $1 /media/"$*" ]
            zenity --info --title "ISO Mounter" --text "$* Successfully Mounted."
            exit 0
        else
            sudo rmdir /media/"$*"
            zenity --error --title "ISO Mounter" --text "Cannot mount $*!"
            exit 1
        fi
    else
        sudo rmdir /media/"$*"
        zenity --error --title "ISO Mounter" --text "Cannot mount $*!"
        exit 1
    fi
fi