]>
Commit | Line | Data |
---|---|---|
ffa8d2a0 | 1 | /* Copyright (C) 1993,95,96,97,2002 Free Software Foundation, Inc. |
41bdb6e2 | 2 | This file is part of the GNU C Library. |
40a55d20 | 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. | |
40a55d20 | 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 | |
40a55d20 | 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
41bdb6e2 AJ |
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, write to the Free | |
16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
17 | 02111-1307 USA. | |
18 | ||
19 | As a special exception, if you link the code in this file with | |
20 | files compiled with a GNU compiler to produce an executable, | |
21 | that does not cause the resulting executable to be covered by | |
22 | the GNU Lesser General Public License. This exception does not | |
23 | however invalidate any other reasons why the executable file | |
24 | might be covered by the GNU Lesser General Public License. | |
25 | This exception applies to code released by its copyright holders | |
26 | in files containing the exception. */ | |
96aa2d94 RM |
27 | |
28 | #include "libioP.h" | |
3ba06713 | 29 | #include <stdio.h> |
96aa2d94 RM |
30 | |
31 | int | |
32 | fileno (fp) | |
33 | _IO_FILE* fp; | |
34 | { | |
35 | CHECK_FILE (fp, EOF); | |
36 | ||
110215a9 UD |
37 | if (!(fp->_flags & _IO_IS_FILEBUF) || _IO_fileno (fp) < 0) |
38 | { | |
39 | __set_errno (EBADF); | |
40 | return -1; | |
41 | } | |
96aa2d94 RM |
42 | |
43 | return _IO_fileno (fp); | |
44 | } | |
3ba06713 | 45 | libc_hidden_def (fileno) |
7c713e28 | 46 | |
40a55d20 | 47 | #ifdef weak_alias |
7c713e28 RM |
48 | /* The fileno implementation for libio does not require locking because |
49 | it only accesses once a single variable and this is already atomic | |
ffa8d2a0 | 50 | (at least at thread level). Therefore we don't test _IO_MTSAFE_IO here. */ |
7c713e28 | 51 | |
edf5b2d7 | 52 | weak_alias (fileno, fileno_unlocked) |
7c713e28 | 53 | #endif |