10Sstevel@tonic-gate /* 20Sstevel@tonic-gate * CDDL HEADER START 30Sstevel@tonic-gate * 40Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*6812Sraf * Common Development and Distribution License (the "License"). 6*6812Sraf * You may not use this file except in compliance with the License. 70Sstevel@tonic-gate * 80Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 90Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 100Sstevel@tonic-gate * See the License for the specific language governing permissions 110Sstevel@tonic-gate * and limitations under the License. 120Sstevel@tonic-gate * 130Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 140Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 150Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 160Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 170Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 180Sstevel@tonic-gate * 190Sstevel@tonic-gate * CDDL HEADER END 200Sstevel@tonic-gate */ 21*6812Sraf 220Sstevel@tonic-gate /* 23*6812Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 240Sstevel@tonic-gate * Use is subject to license terms. 250Sstevel@tonic-gate */ 260Sstevel@tonic-gate 270Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */ 280Sstevel@tonic-gate /* All Rights Reserved */ 290Sstevel@tonic-gate 30*6812Sraf #pragma ident "%Z%%M% %I% %E% SMI" 310Sstevel@tonic-gate 320Sstevel@tonic-gate /* 330Sstevel@tonic-gate * Return file offset. 340Sstevel@tonic-gate * Coordinates with buffering. 350Sstevel@tonic-gate */ 36*6812Sraf #pragma weak _ftell = ftell 370Sstevel@tonic-gate 38*6812Sraf #include "lint.h" 390Sstevel@tonic-gate #include "file64.h" 400Sstevel@tonic-gate #include "mtlib.h" 410Sstevel@tonic-gate #include <fcntl.h> 420Sstevel@tonic-gate #include <stdio.h> 430Sstevel@tonic-gate #include <thread.h> 440Sstevel@tonic-gate #include <synch.h> 450Sstevel@tonic-gate #include <errno.h> 460Sstevel@tonic-gate #include <unistd.h> 470Sstevel@tonic-gate #include <stddef.h> 480Sstevel@tonic-gate #include <limits.h> 490Sstevel@tonic-gate #include <sys/types.h> 500Sstevel@tonic-gate #include "stdiom.h" 510Sstevel@tonic-gate 520Sstevel@tonic-gate long ftell(FILE * iop)530Sstevel@tonic-gateftell(FILE *iop) 540Sstevel@tonic-gate { 550Sstevel@tonic-gate ptrdiff_t adjust; 560Sstevel@tonic-gate off64_t tres; 570Sstevel@tonic-gate rmutex_t *lk; 580Sstevel@tonic-gate 590Sstevel@tonic-gate FLOCKFILE(lk, iop); 600Sstevel@tonic-gate if (iop->_cnt < 0) 610Sstevel@tonic-gate iop->_cnt = 0; 620Sstevel@tonic-gate if (iop->_flag & _IOREAD) 630Sstevel@tonic-gate adjust = (ptrdiff_t)-iop->_cnt; 640Sstevel@tonic-gate else if (iop->_flag & (_IOWRT | _IORW)) { 650Sstevel@tonic-gate adjust = 0; 660Sstevel@tonic-gate if (((iop->_flag & (_IOWRT | _IONBF)) == _IOWRT) && 67*6812Sraf (iop->_base != 0)) 680Sstevel@tonic-gate adjust = iop->_ptr - iop->_base; 690Sstevel@tonic-gate else if ((iop->_flag & _IORW) && (iop->_base != 0)) 700Sstevel@tonic-gate adjust = (ptrdiff_t)-iop->_cnt; 710Sstevel@tonic-gate } else { 720Sstevel@tonic-gate errno = EBADF; /* file descriptor refers to no open file */ 730Sstevel@tonic-gate FUNLOCKFILE(lk); 740Sstevel@tonic-gate return (EOF); 750Sstevel@tonic-gate } 760Sstevel@tonic-gate 770Sstevel@tonic-gate tres = lseek64(FILENO(iop), 0, SEEK_CUR); 780Sstevel@tonic-gate if (tres >= 0) 790Sstevel@tonic-gate tres += adjust; 800Sstevel@tonic-gate 810Sstevel@tonic-gate if (tres > LONG_MAX) { 820Sstevel@tonic-gate errno = EOVERFLOW; 830Sstevel@tonic-gate FUNLOCKFILE(lk); 840Sstevel@tonic-gate return (EOF); 850Sstevel@tonic-gate } 860Sstevel@tonic-gate 870Sstevel@tonic-gate FUNLOCKFILE(lk); 880Sstevel@tonic-gate return ((long)tres); 890Sstevel@tonic-gate } 90