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