1/* Copyright (C) 1993-2020 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>.
17
18 As a special exception, if you link the code in this file with
19 files compiled with a GNU compiler to produce an executable,
20 that does not cause the resulting executable to be covered by
21 the GNU Lesser General Public License. This exception does not
22 however invalidate any other reasons why the executable file
23 might be covered by the GNU Lesser General Public License.
24 This exception applies to code released by its copyright holders
25 in files containing the exception. */
26
27/* We need to avoid the header declarations of these, because
28 the types don't match _IO_fgetpos and then the compiler will
29 complain about the mismatch when we do the alias below. */
30#define _IO_new_fgetpos64 __renamed__IO_new_fgetpos64
31#define _IO_fgetpos64 __renamed__IO_fgetpos64
32#define fgetpos64 __renamed_fgetpos64
33
34#include "libioP.h"
35
36#undef _IO_new_fgetpos64
37#undef _IO_fgetpos64
38#undef fgetpos64
39
40#include <errno.h>
41#include <stdlib.h>
42#include <shlib-compat.h>
43
44int
45_IO_new_fgetpos (FILE *fp, __fpos_t *posp)
46{
47 off64_t pos;
48 int result = 0;
49 CHECK_FILE (fp, EOF);
50 _IO_acquire_lock (fp);
51 pos = _IO_seekoff_unlocked (fp, 0, _IO_seek_cur, 0);
52 if (_IO_in_backup (fp) && pos != _IO_pos_BAD)
53 {
54 if (fp->_mode <= 0)
55 pos -= fp->_IO_save_end - fp->_IO_save_base;
56 }
57 if (pos == _IO_pos_BAD)
58 {
59 /* ANSI explicitly requires setting errno to a positive value on
60 failure. */
61 if (errno == 0)
62 __set_errno (EIO);
63 result = EOF;
64 }
65 else if ((off64_t) (__typeof (posp->__pos)) pos != pos)
66 {
67 __set_errno (EOVERFLOW);
68 result = EOF;
69 }
70 else
71 {
72 posp->__pos = pos;
73 if (fp->_mode > 0 && __libio_codecvt_encoding (fp->_codecvt) < 0)
74 /* This is a stateful encoding, safe the state. */
75 posp->__state = fp->_wide_data->_IO_state;
76 }
77
78 _IO_release_lock (fp);
79 return result;
80}
81
82strong_alias (_IO_new_fgetpos, __new_fgetpos)
83versioned_symbol (libc, _IO_new_fgetpos, _IO_fgetpos, GLIBC_2_2);
84versioned_symbol (libc, __new_fgetpos, fgetpos, GLIBC_2_2);
85
86#ifdef __OFF_T_MATCHES_OFF64_T
87strong_alias (_IO_new_fgetpos, _IO_new_fgetpos64)
88strong_alias (_IO_new_fgetpos64, __new_fgetpos64)
89versioned_symbol (libc, _IO_new_fgetpos64, _IO_fgetpos64, GLIBC_2_2);
90versioned_symbol (libc, __new_fgetpos64, fgetpos64, GLIBC_2_2);
91#endif
92