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 .