Smells like homework.

You can implement this by writing a program, preferably in perl, to OPEN a file, READ the contents, and PARSE it (the split function is useful here).

Once parsed, you can assign the components to variables as necessary. Open additional files based on the information in the variables.

If, after you have read the documentation, and tried to implement this, you have difficulty with some portion of it, please return here , and explain what you have tried, post the code, even if it does not work, explain what you expect it do do, and we will be glad to assist you with it.