How to check the extension of a filename in a bash script?

Question

I am writing a nightly build script in bash.
Everything is fine and dandy except for one little snag:

#!/bin/bash

for file in \"$PATH_TO_SOMEWHERE\"; d         


        

Answer 1

Similar to 'file', use the slightly simpler 'mimetype -b' which will work no matter the file extension.

if [ $(mimetype -b "$MyFile") == "text/plain" ]
then
  echo "this is a text file"
fi

Edit: you may need to install libfile-mimeinfo-perl on your system if mimetype is not available

Answer 2

The correct answer on how to take the extension available in a filename in linux is:

${filename##*\.} 

Example of printing all file extensions in a directory

for fname in $(find . -maxdepth 1 -type f) # only regular file in the current dir
    do  echo ${fname##*\.} #print extensions 
done

Answer 3

Make

if [ "$file" == "*.txt" ]

like this:

if [[ $file == *.txt ]]

That is, double brackets and no quotes.

The right side of == is a shell pattern. If you need a regular expression, use =~ then.