temporaneità

Reading the referers of this website, I found that someone reached it querying a search engine for

bash scripting validate file extension

I suppose they were looking for a script that, for example, when it finds a perl file, it is able to recognise it as such even if its extension is not pl.
Well, the following is my recipe for your Ferragosto Bash-becue

1. Using your favourite language, populate an associative array with the strings that file shows for the extensions that you are interested to map. Like:

   php => PHP script text
   pl  => perl script text executable

2. Within a Bash loop over the folder of your files:
   • run file against each file and save the string that it shows;
   • using awk, extract the extension of each file and look at the associative array: if the associated string is not the same that you have just found then the extension of your file is not validated.
3. Don’t grill that much, please.