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SETBUF(3P)                 POSIX Programmer's Manual                SETBUF(3P)

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.
NAME
       setbuf - 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 ALSO
       fopen(),     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(3P)