[SOLVED] Appending file extensions to filenames in bash scripts

LadyAnne · 05-18-2010, 01:26 AM

Hi

Suppose I have a variable called filename which contains the name of a file but the name does not contain an extension.

How do I go about doing this?

Thanks

ajeetsinghraina · 05-18-2010, 01:40 AM

Can you elaborate?

Do you mean this:

Code:

filename = tinyscript
echo $filename

Code:

How do I go about doing this?

what confused you?

druuna · 05-18-2010, 02:06 AM

Hi,

Is this what you are looking for: echo ${filename}.txt or fullname=${filename}.txt

filename is the variable that holds a value and .txt is a hardcoded extension. The braces make sure that filename recognized as such.

Hope this helps.

catkin · 05-18-2010, 02:24 AM

Quote:

Originally Posted by druuna

filename is the variable that holds a value and .txt is a hardcoded extension. The braces make sure that filename recognized as such.

In the two contexts shown, the braces are not wrong but are not necessary because the following "." is not a valid variable name character so terminates the variable name.

druuna · 05-18-2010, 02:32 AM

Hi,

@catkin: True.

I did hope it also shows how to append a hardcoded string to a variable. I.e.:

$ foo="cat"
$ foobar="${foo}kin"
$ echo $foobar
catkin