C Language: setbuf function(Set Buffer)

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In the C Programming Language, the setbuf function lets you change the way a stream is buffered and to control the size and location of the buffer. The setbuf function assumes default values for the buffering mode and buffer size.

If buf is not a null pointer, the setbuf function will perform the equivalent to the setvbuf function as:




(void) setvbuf(stream, buf, _IOFBF, BUFSIZ);


If buf is a null pointer, the setbuf function will perform the equivalent to the setvbuf function as:




(void) setvbuf(stream, NULL, _IONBF, 0);


Syntax

The syntax for the setbuf function in the C Language is:




void setbuf(FILE  *stream, char *buf);


Parameters or Arguments

stream

The stream to modify.

buf

A pointer to the desired buffer.

Returns

The setbuf function returns zero if successful or a nonzero value if an error was encountered.

Required Header

In the C Language, the required header for the setbuf function is:




#include <stdio.h>


Applies To

In the C Language, the setbuf function can be used in the following versions:

  • ANSI/ISO 9899-1990

stdio.h Functions





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