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 (c) 1998, by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 /* 28 * Extensions to the stdio package 29 */ 30 31 #ifndef _STDIO_EXT_H 32 #define _STDIO_EXT_H 33 34 #pragma ident "%Z%%M% %I% %E% SMI" 35 36 #include <stdio.h> 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 /* 43 * Even though the contents of the stdio FILE structure have always been 44 * private to the stdio implementation, over the years some programs have 45 * needed to get information about a stdio stream that was not accessible 46 * through a supported interface. These programs have resorted to accessing 47 * fields of the FILE structure directly, rendering them possibly non-portable 48 * to new implementations of stdio, or more likely, preventing enhancements 49 * to stdio because those programs will break. 50 * 51 * In the 64-bit world, the FILE structure is opaque. The routines here 52 * are provided as a way to get the information that used to be retrieved 53 * directly from the FILE structure. They are based on the needs of 54 * existing programs (such as 'mh' and 'emacs'), so they may be extended 55 * as other programs are ported. Though they may still be non-portable to 56 * other operating systems, they will work from each Solaris release to 57 * the next. More portable interfaces are being developed. 58 */ 59 60 #define FSETLOCKING_QUERY 0 61 #define FSETLOCKING_INTERNAL 1 62 #define FSETLOCKING_BYCALLER 2 63 64 extern size_t __fbufsize(FILE *stream); 65 extern int __freading(FILE *stream); 66 extern int __fwriting(FILE *stream); 67 extern int __freadable(FILE *stream); 68 extern int __fwritable(FILE *stream); 69 extern int __flbf(FILE *stream); 70 extern void __fpurge(FILE *stream); 71 extern size_t __fpending(FILE *stream); 72 extern void _flushlbf(void); 73 extern int __fsetlocking(FILE *stream, int type); 74 75 #ifdef __cplusplus 76 } 77 #endif 78 79 #endif /* _STDIO_EXT_H */ 80