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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27/* Copyright (c) 1988 AT&T */ 28/* All Rights Reserved */ 29 30#pragma ident "%Z%%M% %I% %E% SMI" 31 32/* 33 * Return file offset. 34 * Coordinates with buffering. 35 */ 36 37#include <sys/feature_tests.h> 38 39#if !defined(_LP64) 40#pragma weak _ftello64 = ftello64 41#endif 42#pragma weak _ftello = ftello 43 44#include "lint.h" 45#include "file64.h" 46#include "mtlib.h" 47#include <sys/types.h> 48#include <unistd.h> 49#include <stdio.h> 50#include <thread.h> 51#include <synch.h> 52#include <errno.h> 53#include <limits.h> 54#include <fcntl.h> 55#include <stddef.h> 56#include "stdiom.h" 57 58#if !defined(_LP64) 59 60off64_t 61ftello64(FILE *iop) 62{ 63 ptrdiff_t adjust; 64 off64_t tres; 65 rmutex_t *lk; 66 67 FLOCKFILE(lk, iop); 68 if (iop->_cnt < 0) 69 iop->_cnt = 0; 70 if (iop->_flag & _IOREAD) 71 adjust = (ptrdiff_t)-iop->_cnt; 72 else if (iop->_flag & (_IOWRT | _IORW)) { 73 adjust = 0; 74 if (((iop->_flag & (_IOWRT | _IONBF)) == _IOWRT) && 75 (iop->_base != 0)) 76 adjust = iop->_ptr - iop->_base; 77 } else { 78 errno = EBADF; /* file descriptor refers to no open file */ 79 FUNLOCKFILE(lk); 80 return ((off64_t)EOF); 81 } 82 tres = lseek64(FILENO(iop), 0, SEEK_CUR); 83 if (tres >= 0) 84 tres += (off64_t)adjust; 85 FUNLOCKFILE(lk); 86 return (tres); 87} 88 89#endif /* _LP64 */ 90 91off_t 92ftello(FILE *iop) 93{ 94 return ((off_t)ftell(iop)); 95} 96