1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1986 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984 AT&T */ 28 /* All Rights Reserved */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" /* from S5R2 2.2 */ 31 32 /*LINTLIBRARY*/ 33 #include <stdio.h> 34 35 extern void free(); 36 extern int isatty(); 37 extern unsigned char (*_smbuf)[_SBFSIZ]; 38 extern void _getsmbuf(); 39 40 void 41 setbuf(iop, buf) 42 register FILE *iop; 43 char *buf; 44 { 45 register int fno = fileno(iop); /* file number */ 46 47 if(iop->_base != NULL && iop->_flag & _IOMYBUF) 48 free((char*)iop->_base); 49 iop->_flag &= ~(_IOMYBUF | _IONBF | _IOLBF); 50 if((iop->_base = (unsigned char*)buf) == NULL) { 51 iop->_flag |= _IONBF; /* file unbuffered except in fastio */ 52 /* use small buffers reserved for this */ 53 iop->_base = _smbuf[fno]; 54 iop->_bufsiz = _SBFSIZ; 55 } 56 else { /* regular buffered I/O, standard buffer size */ 57 if (isatty(fno)) 58 iop->_flag |= _IOLBF; 59 iop->_bufsiz = BUFSIZ; 60 } 61 iop->_ptr = iop->_base; 62 iop->_cnt = 0; 63 } 64