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 /* 28 * University Copyright- Copyright (c) 1982, 1986, 1988 29 * The Regents of the University of California 30 * All Rights Reserved 31 * 32 * University Acknowledgment- Portions of this document are derived from 33 * software developed by the University of California, Berkeley, and its 34 * contributors. 35 */ 36 37 #pragma ident "%Z%%M% %I% %E% SMI" 38 39 #include <stdio.h> 40 #include <malloc.h> 41 #include <unistd.h> 42 43 extern unsigned char (*_smbuf)[_SBFSIZ]; 44 45 void 46 setbuffer(FILE *iop, char *buf, int size) 47 { 48 int fno = fileno(iop); /* file number */ 49 50 if (iop->_base != NULL && iop->_flag&_IOMYBUF) 51 free((char *)iop->_base); 52 iop->_flag &= ~(_IOMYBUF|_IONBF|_IOLBF); 53 if ((iop->_base = (unsigned char *)buf) == NULL) { 54 iop->_flag |= _IONBF; /* file unbuffered except in fastio */ 55 /* use small buffers reserved for this */ 56 iop->_base = _smbuf[fno]; 57 iop->_bufsiz = _SBFSIZ; 58 } else { 59 /* regular buffered I/O, specified buffer size */ 60 if (size <= 0) 61 return; 62 iop->_bufsiz = size; 63 } 64 iop->_ptr = iop->_base; 65 iop->_cnt = 0; 66 } 67 68 /* 69 * set line buffering 70 */ 71 int 72 setlinebuf(FILE *iop) 73 { 74 char *buf; 75 76 fflush(iop); 77 setbuffer(iop, NULL, 0); 78 buf = (char *)malloc(128); 79 if (buf != NULL) { 80 setbuffer(iop, buf, 128); 81 iop->_flag |= _IOLBF|_IOMYBUF; 82 } 83 return (0); 84 } 85