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setbuf
======

Syntax
------

     #include <stdio.h>
     
     void setbuf(FILE *file, char *buffer);

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

This function modifies the buffering characteristics of FILE.  First,
if the file already has a buffer, it is freed.  If there was any
pending data in it, it is lost, so this function should only be used
immediately after a call to `fopen'.

If the BUFFER passed is `NULL', the file is set to unbuffered.  If a
non-`NULL' buffer is passed, it must be at least `BUFSIZ' bytes in
size, and the file is set to fully buffered.

setbuffer:.  setlinebuf:.  setvbuf:.         

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

None.

Example
-------

     setbuf(stdout, malloc(BUFSIZ));