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Directory and File Operation Built-ins

Two useful functions that are not in awk are chdir (so that an awk program can change its directory) and stat (so that an awk program can gather information about a file). This section implements these functions for gawk in an external extension library.

• Internal File Description: What the new functions will do.
• Internal File Ops: The code for internal file operations.
• Using Internal File Ops: How to use an external extension.