SETBUF(P) POSIX Programmer's Manual SETBUF(P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding
Linux manual page for details of Linux behavior), or the interface may
not be implemented on Linux.
NAMEsetbuf - assign buffering to a stream
SYNOPSIS
#include <stdio.h>
void setbuf(FILE *restrict stream, char *restrict buf);
DESCRIPTION
Except that it returns no value, the function call:
setbuf(stream, buf)
shall be equivalent to:
setvbuf(stream, buf, _IOFBF, BUFSIZ)
if buf is not a null pointer, or to:
setvbuf(stream, buf, _IONBF, BUFSIZ)
if buf is a null pointer.
RETURN VALUE
The setbuf() function shall not return a value.
ERRORS
No errors are defined.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
A common source of error is allocating buffer space as an "automatic"
variable in a code block, and then failing to close the stream in the
same block.
With setbuf(), allocating a buffer of BUFSIZ bytes does not necessarily
imply that all of BUFSIZ bytes are used for the buffer area.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSOfopen() , setvbuf() , the Base Definitions volume of
IEEE Std 1003.1-2001, <stdio.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online
at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 SETBUF(P)
