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 C.3.2 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 minor node
 implements these functions for `gawk' in an external extension library.
 

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* 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.
 

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