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 2003 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * University Copyright- Copyright (c) 1982, 1986, 1988 32 * The Regents of the University of California 33 * All Rights Reserved 34 * 35 * University Acknowledgment- Portions of this document are derived from 36 * software developed by the University of California, Berkeley, and its 37 * contributors. 38 */ 39 40 #pragma ident "%Z%%M% %I% %E% SMI" 41 42 /*LINTLIBRARY*/ 43 44 #include <sys/types.h> 45 #include "file64.h" 46 #include <stdio.h> 47 #include "stdiom.h" 48 #include <stdlib.h> 49 50 extern Uchar _smbuf[][_NFILE]; 51 52 void 53 setbuffer(FILE *iop, char *abuf, int asize) 54 { 55 Uchar *buf = (Uchar *)abuf; 56 int fno = iop->_file; /* file number */ 57 int size = asize - _SMBFSZ; 58 Uchar *temp; 59 60 if (iop->_base != 0 && iop->_flag & _IOMYBUF) 61 free((char *)iop->_base - PUSHBACK); 62 iop->_flag &= ~(_IOMYBUF | _IONBF | _IOLBF); 63 if (buf == 0) { 64 iop->_flag |= _IONBF; 65 #ifndef _STDIO_ALLOCATE 66 if (fno < 2) { 67 /* use special buffer for std{in,out} */ 68 buf = (fno == 0) ? _sibuf : _sobuf; 69 size = BUFSIZ - _SMBFSZ; 70 } else /* needed for ifdef */ 71 #endif 72 if (fno < _NFILE) { 73 buf = _smbuf[fno]; 74 size = _SMBFSZ - PUSHBACK; 75 } else if ((buf = (Uchar *)malloc(_SMBFSZ * sizeof (Uchar))) != 76 0) { 77 iop->_flag |= _IOMYBUF; 78 size = _SMBFSZ - PUSHBACK; 79 } 80 } else /* regular buffered I/O, specified buffer size */ { 81 if (size <= 0) 82 return; 83 } 84 if (buf == 0) 85 return; /* malloc() failed */ 86 temp = buf + PUSHBACK; 87 iop->_base = temp; 88 _setbufend(iop, temp + size); 89 iop->_ptr = temp; 90 iop->_cnt = 0; 91 } 92 93 /* 94 * set line buffering 95 */ 96 97 int 98 setlinebuf(FILE *iop) 99 { 100 char *buf; 101 102 (void) fflush(iop); 103 setbuffer(iop, (char *)NULL, 0); 104 buf = (char *)malloc(128); 105 if (buf != NULL) { 106 setbuffer(iop, buf, 128); 107 iop->_flag |= _IOLBF|_IOMYBUF; 108 } 109 return (0); /* returns no useful value, keep the same prototype */ 110 } 111