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