1 /* isatty() replacement.
2 Copyright (C) 2012-2015 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 <http://www.gnu.org/licenses/>. */
22 /* This replacement is enabled on native Windows. */
26 /* Get declarations of the Win32 API functions. */
27 #define WIN32_LEAN_AND_MEAN
30 #include "msvc-inval.h"
32 /* Get _get_osfhandle(). */
33 #include "msvc-nothrow.h"
35 static BOOL
IsConsoleHandle (HANDLE h
)
38 return GetConsoleMode (h
, &mode
) != 0;
41 #if HAVE_MSVC_INVALID_PARAMETER_HANDLER
43 _isatty_nothrow (int fd
)
49 result
= _isatty (fd
);
60 # define _isatty_nothrow _isatty
63 /* Determine whether FD refers to a console device. Return 1 if yes.
64 Return 0 and set errno if no. (ptsname_r relies on the errno value.) */
68 HANDLE h
= (HANDLE
) _get_osfhandle (fd
);
69 if (h
== INVALID_HANDLE_VALUE
)
74 /* _isatty (fd) tests whether GetFileType of the handle is FILE_TYPE_CHAR.
75 But it does not set errno when it returns 0. */
76 if (_isatty_nothrow (fd
))
78 if (IsConsoleHandle (h
))