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