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-rw-r--r--tests/test-fwrite.c94
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diff --git a/tests/test-fwrite.c b/tests/test-fwrite.c
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+/* Test of fwrite() function.
+ Copyright (C) 2011-2015 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, 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 <http://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fwrite, size_t, (const void *, size_t, size_t, FILE *));
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "msvc-inval.h"
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+ const char *filename = "test-fwrite.txt";
+
+ /* We don't have an fwrite() function that installs an invalid parameter
+ handler so far. So install that handler here, explicitly. */
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
+ && MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
+ gl_msvc_inval_ensure_handler ();
+#endif
+
+ /* Test that fwrite() on an unbuffered stream sets errno if someone else
+ closes the stream fd behind the back of stdio. */
+ {
+ FILE *fp = fopen (filename, "w");
+ char buf[5] = "world";
+ ASSERT (fp != NULL);
+ setvbuf (fp, NULL, _IONBF, 0);
+ ASSERT (close (fileno (fp)) == 0);
+ errno = 0;
+ ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0);
+ ASSERT (errno == EBADF);
+ ASSERT (ferror (fp));
+ fclose (fp);
+ }
+
+ /* Test that fwrite() on an unbuffered stream sets errno if the stream
+ was constructed with an invalid file descriptor. */
+ {
+ FILE *fp = fdopen (-1, "w");
+ if (fp != NULL)
+ {
+ char buf[5] = "world";
+ setvbuf (fp, NULL, _IONBF, 0);
+ errno = 0;
+ ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0);
+ ASSERT (errno == EBADF);
+ ASSERT (ferror (fp));
+ fclose (fp);
+ }
+ }
+ {
+ FILE *fp;
+ close (99);
+ fp = fdopen (99, "w");
+ if (fp != NULL)
+ {
+ char buf[5] = "world";
+ setvbuf (fp, NULL, _IONBF, 0);
+ errno = 0;
+ ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0);
+ ASSERT (errno == EBADF);
+ ASSERT (ferror (fp));
+ fclose (fp);
+ }
+ }
+
+ /* Clean up. */
+ unlink (filename);
+
+ return 0;
+}