80d50c5665
* tools/snippet/_Noreturn.h, tools/snippet/c++defs.h, tools/snippet/arg-nonnull.h, tools/snippet/warn-on-use.h: Rename to... * lib/_Noreturn.h, lib/c++defs.h, lib/arg-nonnull.h, lib/warn-on-use.h: ... these. * lib/filename.h, lib/getopt-cdefs.in.h, lib/getopt-core.h, lib/getopt-ext.h, lib/getopt-pfx-core.h, lib/getopt-pfx-ext.h, lib/localtime-buffer.c, lib/localtime-buffer.h, lib/malloca.c, lib/malloca.h, lib/malloca.valgrind, lib/stat-w32.c, lib/stat-w32.h, m4/eealloc.m4, m4/localtime-buffer.m4, m4/malloca.m4: New files. * lib/argp-help.c, lib/argp-parse.c, lib/error.c, lib/float.in.h, lib/getopt1.c, lib/getopt.c, lib/getopt.in.h, lib/getopt_int.h, lib/gettext.h, lib/gettimeofday.c, lib/intprops.h, lib/isatty.c, lib/limits.in.h, lib/localcharset.c, lib/Makefile.am, lib/mbrtowc.c, lib/mbsinit.c, lib/msvc-nothrow.c, lib/quotearg.c, lib/stat.c, lib/stdalign.in.h, lib/stdint.in.h, lib/string.in.h, lib/sys_stat.in.h, lib/sys_types.in.h, lib/tempname.c, lib/time.in.h, lib/unistd.in.h, lib/vasnprintf.c, lib/wchar.in.h, lib/wctype.in.h, lib/xalloc.h, lib/xalloc-oversized.h, m4/fcntl-o.m4, m4/float_h.m4, m4/getopt.m4, m4/gettimeofday.m4, m4/gnulib-common.m4, m4/gnulib-comp.m4, m4/include_next.m4, m4/largefile.m4, m4/lstat.m4, m4/mbrtowc.m4, m4/memchr.m4, m4/mkstemp.m4, m4/printf.m4, m4/sleep.m4, m4/stat.m4, m4/stdalign.m4, m4/stdint.m4, m4/strerror.m4, m4/string_h.m4, m4/sys_stat_h.m4, m4/sys_time_h.m4, m4/sys_types_h.m4, m4/time_h.m4, m4/unistd_h.m4, m4/wchar_h.m4, m4/wctype_h.m4, m4/wint_t.m4: Update.
89 lines
2 KiB
C
89 lines
2 KiB
C
/* isatty() replacement.
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Copyright (C) 2012-2017 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include <unistd.h>
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/* This replacement is enabled on native Windows. */
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#include <errno.h>
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/* Get declarations of the Win32 API functions. */
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
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# include "msvc-inval.h"
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#endif
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/* Get _get_osfhandle(). */
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#if GNULIB_MSVC_NOTHROW
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# include "msvc-nothrow.h"
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#else
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# include <io.h>
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#endif
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static BOOL IsConsoleHandle (HANDLE h)
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{
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DWORD mode;
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return GetConsoleMode (h, &mode) != 0;
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}
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#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
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static int
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_isatty_nothrow (int fd)
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{
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int result;
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TRY_MSVC_INVAL
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{
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result = _isatty (fd);
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}
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CATCH_MSVC_INVAL
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{
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result = 0;
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}
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DONE_MSVC_INVAL;
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return result;
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}
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#else
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# define _isatty_nothrow _isatty
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#endif
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/* Determine whether FD refers to a console device. Return 1 if yes.
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Return 0 and set errno if no. (ptsname_r relies on the errno value.) */
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int
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isatty (int fd)
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{
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HANDLE h = (HANDLE) _get_osfhandle (fd);
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if (h == INVALID_HANDLE_VALUE)
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{
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errno = EBADF;
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return 0;
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}
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/* _isatty (fd) tests whether GetFileType of the handle is FILE_TYPE_CHAR.
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But it does not set errno when it returns 0. */
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if (_isatty_nothrow (fd))
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{
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if (IsConsoleHandle (h))
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return 1;
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}
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errno = ENOTTY;
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return 0;
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}
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