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40a55d20 UD |
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. */ | |
96aa2d94 RM |
25 | |
26 | #include "libioP.h" | |
27 | #include "stdio.h" | |
28 | ||
29 | int | |
30 | fileno (fp) | |
31 | _IO_FILE* fp; | |
32 | { | |
33 | CHECK_FILE (fp, EOF); | |
34 | ||
35 | if (!(fp->_flags & _IO_IS_FILEBUF)) | |
36 | return EOF; | |
37 | ||
38 | return _IO_fileno (fp); | |
39 | } | |
7c713e28 RM |
40 | |
41 | #ifdef _IO_MTSAFE_IO | |
40a55d20 | 42 | #ifdef weak_alias |
7c713e28 RM |
43 | /* The fileno implementation for libio does not require locking because |
44 | it only accesses once a single variable and this is already atomic | |
45 | (at least at thread level). */ | |
46 | ||
edf5b2d7 | 47 | weak_alias (fileno, fileno_unlocked) |
7c713e28 | 48 | #endif |
40a55d20 | 49 | #endif |