fchmod-tests, fchmodat tests, lchmod tests: Add more tests.
[gnulib.git] / lib / fwritable.h
blobd3d3b6a9d3770ffe3664d660fa95c6c05d8ccc36
1 /* Retrieve information about a FILE stream.
2 Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
17 #include <stdbool.h>
18 #include <stdio.h>
20 /* Return true if the stream STREAM supports writing, false if it supports
21 only reading.
22 STREAM must not be wide-character oriented.
23 The result doesn't change until the stream is closed or re-opened. */
25 #if HAVE___FWRITABLE
26 /* glibc >= 2.2, Solaris >= 7, UnixWare >= 7.1.4.MP4, Cygwin >= 1.7.34, Android API >= 23, musl libc */
28 # if HAVE_STDIO_EXT_H
29 # include <stdio_ext.h>
30 # endif
31 # define fwritable(stream) (__fwritable (stream) != 0)
33 #else
35 # ifdef __cplusplus
36 extern "C" {
37 # endif
39 extern bool fwritable (FILE *stream) _GL_ATTRIBUTE_PURE;
41 # ifdef __cplusplus
43 # endif
45 #endif