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1 | /* Copyright (C) 1993, 1995, 1996, 1997 Free Software Foundation, Inc. |
2 | This file is part of the GNU IO Library. | |
3 | ||
4 | This library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU General Public License as | |
6 | published by the Free Software Foundation; either version 2, or (at | |
7 | your option) any later version. | |
8 | ||
9 | This library is distributed in the hope that it will be useful, but | |
10 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this library; see the file COPYING. If not, write to | |
16 | the Free Software Foundation, 59 Temple Place - Suite 330, Boston, | |
17 | MA 02111-1307, USA. | |
18 | ||
19 | As a special exception, if you link this library with files | |
20 | compiled with a GNU compiler to produce an executable, this does | |
21 | not cause the resulting executable to be covered by the GNU General | |
22 | Public License. This exception does not however invalidate any | |
23 | other reasons why the executable file might be covered by the GNU | |
24 | General Public License. */ | |
25 | ||
26 | #include <stdio.h> | |
27 | #include <libioP.h> | |
28 | #include <errno.h> | |
29 | ||
30 | ||
31 | off64_t | |
32 | ftello64 (fp) | |
33 | _IO_FILE *fp; | |
34 | { | |
35 | #ifdef _G_LSEEK64 | |
36 | _IO_pos_t pos; | |
37 | CHECK_FILE (fp, -1L); | |
38 | _IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile, fp); | |
39 | _IO_flockfile (fp); | |
40 | pos = _IO_seekoff (fp, 0, _IO_seek_cur, 0); | |
41 | _IO_cleanup_region_end (1); | |
42 | if (pos == _IO_pos_BAD) | |
43 | { | |
44 | #ifdef EIO | |
45 | if (errno == 0) | |
46 | __set_errno (EIO); | |
47 | #endif | |
48 | return -1L; | |
49 | } | |
50 | return _IO_pos_as_off (pos); | |
51 | #else | |
52 | __set_errno (ENOSYS); | |
53 | return -1; | |
54 | #endif | |
55 | } |