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_fwalk
======

Syntax
------

     void _fwalk(void (*function)(FILE *file));

Description
-----------

For each open file in the system, the given FUNCTION is called, passing
the file pointer as it's only argument

Return Value
------------

None.

Example
-------

     void pfile(FILE *x)
     { printf("FILE at %p\n", x); }
     
     _fwalk(pfile);