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b168057a | 1 | /* Copyright (C) 1993-2015 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 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://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 UD |
26 | |
27 | #include <stdio.h> | |
ef52edfc | 28 | #include <stdlib.h> |
a5a0310d UD |
29 | #include <libioP.h> |
30 | #include <errno.h> | |
31 | ||
32 | ||
33 | off_t | |
9d46370c | 34 | __ftello (_IO_FILE *fp) |
a5a0310d | 35 | { |
3efdabe7 | 36 | _IO_off64_t pos; |
a5a0310d | 37 | CHECK_FILE (fp, -1L); |
0261d33f | 38 | _IO_acquire_lock (fp); |
52a16e58 | 39 | pos = _IO_seekoff_unlocked (fp, 0, _IO_seek_cur, 0); |
3447be7b | 40 | if (_IO_in_backup (fp) && pos != _IO_pos_BAD) |
d64b6ad0 UD |
41 | { |
42 | if (fp->_mode <= 0) | |
43 | pos -= fp->_IO_save_end - fp->_IO_save_base; | |
d64b6ad0 | 44 | } |
0261d33f | 45 | _IO_release_lock (fp); |
a5a0310d UD |
46 | if (pos == _IO_pos_BAD) |
47 | { | |
48 | #ifdef EIO | |
49 | if (errno == 0) | |
50 | __set_errno (EIO); | |
3efdabe7 RM |
51 | #endif |
52 | return -1L; | |
53 | } | |
54 | if ((_IO_off64_t) (off_t) pos != pos) | |
55 | { | |
56 | #ifdef EOVERFLOW | |
57 | __set_errno (EOVERFLOW); | |
a5a0310d UD |
58 | #endif |
59 | return -1L; | |
60 | } | |
d64b6ad0 | 61 | return pos; |
a5a0310d | 62 | } |
5a6fa4d7 JM |
63 | libc_hidden_def (__ftello) |
64 | weak_alias (__ftello, ftello) | |
03af9520 RM |
65 | |
66 | #ifdef __OFF_T_MATCHES_OFF64_T | |
5a6fa4d7 | 67 | weak_alias (__ftello, ftello64) |
03af9520 | 68 | #endif |