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-rw-r--r--lib/binary-io.c37
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diff --git a/lib/binary-io.c b/lib/binary-io.c
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+++ b/lib/binary-io.c
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+/* Binary mode I/O.
+ Copyright 2017-2018 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+#define BINARY_IO_INLINE _GL_EXTERN_INLINE
+#include "binary-io.h"
+
+#if defined __DJGPP__ || defined __EMX__
+# include <errno.h>
+# include <unistd.h>
+
+int
+__gl_setmode_check (int fd)
+{
+ if (isatty (fd))
+ {
+ errno = EINVAL;
+ return -1;
+ }
+ else
+ return 0;
+}
+#endif