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 1998 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 2.1 */ 31 32 /*LINTLIBRARY*/ 33 #include <stdio.h> 34 35 extern _findbuf(); 36 extern int read(); 37 extern int fflush(); 38 39 int 40 __filbuf(iop) 41 register FILE *iop; 42 { 43 return (_filbuf(iop)); 44 } 45 46 int 47 _filbuf(iop) 48 register FILE *iop; 49 { 50 static void lbfflush(); 51 52 if ( !(iop->_flag & _IOREAD) ) 53 if (iop->_flag & _IORW) 54 iop->_flag |= _IOREAD; 55 else 56 return(EOF); 57 58 if (iop->_flag&_IOSTRG) 59 return(EOF); 60 61 if (iop->_base == NULL) /* get buffer if we don't have one */ 62 _findbuf(iop); 63 64 /* if this device is a terminal (line-buffered) or unbuffered, then */ 65 /* flush buffers of all line-buffered devices currently writing */ 66 67 if (iop->_flag & (_IOLBF | _IONBF)) 68 _fwalk(lbfflush); 69 70 iop->_ptr = iop->_base; 71 iop->_cnt = read(fileno(iop), (char *)iop->_base, 72 (unsigned)((iop->_flag & _IONBF) ? 1 : iop->_bufsiz )); 73 if (--iop->_cnt >= 0) /* success */ 74 return (*iop->_ptr++); 75 if (iop->_cnt != -1) /* error */ 76 iop->_flag |= _IOERR; 77 else { /* end-of-file */ 78 iop->_flag |= _IOEOF; 79 if (iop->_flag & _IORW) 80 iop->_flag &= ~_IOREAD; 81 } 82 iop->_cnt = 0; 83 return (EOF); 84 } 85 86 static void 87 lbfflush(iop) 88 FILE *iop; 89 { 90 if (iop->_flag & _IOLBF) 91 (void) fflush(iop); 92 } 93