xref: /onnv-gate/usr/src/lib/libc/port/stdio/setbuffer.c (revision 6812:febeba71273d)
10Sstevel@tonic-gate /*
20Sstevel@tonic-gate  * CDDL HEADER START
30Sstevel@tonic-gate  *
40Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*6812Sraf  * Common Development and Distribution License (the "License").
6*6812Sraf  * You may not use this file except in compliance with the License.
70Sstevel@tonic-gate  *
80Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
90Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
100Sstevel@tonic-gate  * See the License for the specific language governing permissions
110Sstevel@tonic-gate  * and limitations under the License.
120Sstevel@tonic-gate  *
130Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
140Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
150Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
160Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
170Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
180Sstevel@tonic-gate  *
190Sstevel@tonic-gate  * CDDL HEADER END
200Sstevel@tonic-gate  */
21*6812Sraf 
220Sstevel@tonic-gate /*
23*6812Sraf  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
240Sstevel@tonic-gate  * Use is subject to license terms.
250Sstevel@tonic-gate  */
260Sstevel@tonic-gate 
270Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
280Sstevel@tonic-gate 
290Sstevel@tonic-gate /*
300Sstevel@tonic-gate  * Compatibility wrappers for setbuffer and setlinebuf
310Sstevel@tonic-gate  */
320Sstevel@tonic-gate 
33*6812Sraf #include "lint.h"
340Sstevel@tonic-gate #include <sys/types.h>
350Sstevel@tonic-gate #include <stdio.h>
360Sstevel@tonic-gate #include <stdlib.h>
370Sstevel@tonic-gate 
380Sstevel@tonic-gate /*
390Sstevel@tonic-gate  * Associate a buffer with an "unused" stream.
400Sstevel@tonic-gate  * If the buffer is NULL, then make the stream completely unbuffered.
410Sstevel@tonic-gate  */
420Sstevel@tonic-gate void
setbuffer(FILE * iop,char * abuf,size_t asize)430Sstevel@tonic-gate setbuffer(FILE *iop, char *abuf, size_t asize)
440Sstevel@tonic-gate {
450Sstevel@tonic-gate 	if (abuf == NULL)
460Sstevel@tonic-gate 		(void) setvbuf(iop, NULL, _IONBF, 0);
470Sstevel@tonic-gate 	else
480Sstevel@tonic-gate 		(void) setvbuf(iop, abuf, _IOFBF, asize);
490Sstevel@tonic-gate }
500Sstevel@tonic-gate 
510Sstevel@tonic-gate /*
520Sstevel@tonic-gate  * Convert a block buffered or line buffered stream to be line buffered
530Sstevel@tonic-gate  * Allowed while the stream is still active; relies on the implementation
540Sstevel@tonic-gate  * not the interface!
550Sstevel@tonic-gate  */
560Sstevel@tonic-gate 
570Sstevel@tonic-gate int
setlinebuf(FILE * iop)580Sstevel@tonic-gate setlinebuf(FILE *iop)
590Sstevel@tonic-gate {
600Sstevel@tonic-gate 	(void) fflush(iop);
610Sstevel@tonic-gate 	(void) setvbuf(iop, NULL, _IOLBF, 128);
620Sstevel@tonic-gate 	return (0);
630Sstevel@tonic-gate }
64