How to skip a directory in awk?

Question

Say I have the following structure of files and directories:

$ tree
.
├── a
├── b
└── dir
    └── c

1 directory, 3 files

That is, two file

Answer 1

I would simply avoid to pass directories to awk since even POSIX says that all filename args must be text files.

You can use find for traversing the directory:

find PATH -type f -exec awk 'program' {} +