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"; do       if [ -d $file ]       then               # do something directory-ish       else               if [ "$file" == "*.txt" ]       #  this is the snag               then                      # do something txt-ish               fi       fi done; 

My problem is determining the file extension and then acting accordingly. I know the issue is in the if-statement, testing for a txt file.

How can I determine if a file has a .txt suffix?

Answer 1

I think you want to say "Are the last four characters of $file equal to .txt?" If so, you can use the following:

if [ "${file: -4}" == ".txt" ] 

Note that the space between file: and -4 is required, as the ‘:-‘ modifier means something different.