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 * Seek for standard library. Coordinates with buffering.
34 */
35
36 #include <sys/feature_tests.h>
37
38 #if !defined(_LP64)
39 #pragma weak _fseeko64 = fseeko64
40 #endif
41 #pragma weak _fseeko = fseeko
42
43 #include "lint.h"
44 #include "file64.h"
45 #include "mtlib.h"
46 #include <sys/types.h>
47 #include <unistd.h>
48 #include <limits.h>
49 #include <stdio.h>
50 #include <errno.h>
51 #include <thread.h>
52 #include <synch.h>
53 #include "stdiom.h"
54
55 #if !defined(_LP64)
56 int
fseeko64(FILE * iop,off64_t offset,int ptrname)57 fseeko64(FILE *iop, off64_t offset, int ptrname)
58 {
59 off64_t p;
60 rmutex_t *lk;
61
62 FLOCKFILE(lk, iop);
63 iop->_flag &= ~_IOEOF;
64
65 if (!(iop->_flag & _IOREAD) && !(iop->_flag & (_IOWRT | _IORW))) {
66 errno = EBADF;
67 FUNLOCKFILE(lk);
68 return (-1);
69 }
70
71 if (iop->_flag & _IOREAD) {
72 if (ptrname == 1 && iop->_base && !(iop->_flag&_IONBF)) {
73 offset -= iop->_cnt;
74 }
75 } else if (iop->_flag & (_IOWRT | _IORW)) {
76 if (_fflush_u(iop) == EOF) {
77 FUNLOCKFILE(lk);
78 return (-1);
79 }
80 }
81 iop->_cnt = 0;
82 iop->_ptr = iop->_base;
83 if (iop->_flag & _IORW) {
84 iop->_flag &= ~(_IOREAD | _IOWRT);
85 }
86 p = lseek64(FILENO(iop), offset, ptrname);
87 FUNLOCKFILE(lk);
88 return ((p == -1)? -1: 0);
89 }
90 #endif /* _LP64 */
91
92 int
fseeko(FILE * iop,off_t offset,int ptrname)93 fseeko(FILE *iop, off_t offset, int ptrname)
94 {
95 return (fseek(iop, offset, ptrname));
96 }
97