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04277e02 | 1 | /* Copyright (C) 1993-2019 Free Software Foundation, Inc. |
41bdb6e2 | 2 | This file is part of the GNU C Library. |
a5a0310d | 3 | |
41bdb6e2 AJ |
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. | |
a5a0310d | 8 | |
41bdb6e2 AJ |
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 | |
a5a0310d | 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
41bdb6e2 | 12 | Lesser General Public License for more details. |
a5a0310d | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. |
a5a0310d | 17 | |
41bdb6e2 AJ |
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. */ | |
a5a0310d | 26 | |
3f5e3f5d FW |
27 | /* We need to disable the redirect for __ftello64 for the alias |
28 | definitions below to work. */ | |
29 | #define __ftello64 __ftello64_disable | |
30 | ||
a5a0310d | 31 | #include <stdio.h> |
ef52edfc | 32 | #include <stdlib.h> |
a5a0310d UD |
33 | #include <libioP.h> |
34 | #include <errno.h> | |
35 | ||
a5a0310d | 36 | off_t |
9964a145 | 37 | __ftello (FILE *fp) |
a5a0310d | 38 | { |
9964a145 | 39 | off64_t pos; |
a5a0310d | 40 | CHECK_FILE (fp, -1L); |
0261d33f | 41 | _IO_acquire_lock (fp); |
52a16e58 | 42 | pos = _IO_seekoff_unlocked (fp, 0, _IO_seek_cur, 0); |
3447be7b | 43 | if (_IO_in_backup (fp) && pos != _IO_pos_BAD) |
d64b6ad0 UD |
44 | { |
45 | if (fp->_mode <= 0) | |
46 | pos -= fp->_IO_save_end - fp->_IO_save_base; | |
d64b6ad0 | 47 | } |
0261d33f | 48 | _IO_release_lock (fp); |
a5a0310d UD |
49 | if (pos == _IO_pos_BAD) |
50 | { | |
a5a0310d UD |
51 | if (errno == 0) |
52 | __set_errno (EIO); | |
3efdabe7 RM |
53 | return -1L; |
54 | } | |
9964a145 | 55 | if ((off64_t) (off_t) pos != pos) |
3efdabe7 | 56 | { |
3efdabe7 | 57 | __set_errno (EOVERFLOW); |
a5a0310d UD |
58 | return -1L; |
59 | } | |
d64b6ad0 | 60 | return pos; |
a5a0310d | 61 | } |
5a6fa4d7 JM |
62 | libc_hidden_def (__ftello) |
63 | weak_alias (__ftello, ftello) | |
03af9520 RM |
64 | |
65 | #ifdef __OFF_T_MATCHES_OFF64_T | |
5a6fa4d7 | 66 | weak_alias (__ftello, ftello64) |
3f5e3f5d FW |
67 | # undef __ftello64 |
68 | strong_alias (__ftello, __ftello64) | |
69 | libc_hidden_ver (__ftello, __ftello64) | |
03af9520 | 70 | #endif |