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/* Test of fread() function.
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Copyright (C) 2011-2012 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, or (at your option)
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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 "signature.h"
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SIGNATURE_CHECK (fread, size_t, (void *, size_t, size_t, FILE *));
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#include "msvc-inval.h"
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main (int argc, char **argv)
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const char *filename = "test-fread.txt";
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/* We don't have an fread() function that installs an invalid parameter
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handler so far. So install that handler here, explicitly. */
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#if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
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&& MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
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gl_msvc_inval_ensure_handler ();
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const char text[] = "hello world";
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int fd = open (filename, O_RDWR | O_CREAT | O_TRUNC, 0600);
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ASSERT (write (fd, text, sizeof (text)) == sizeof (text));
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ASSERT (close (fd) == 0);
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/* Test that fread() sets errno if someone else closes the stream
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fd behind the back of stdio. */
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FILE *fp = fopen (filename, "r");
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ASSERT (close (fileno (fp)) == 0);
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ASSERT (fread (buf, 1, sizeof (buf), fp) == 0);
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ASSERT (errno == EBADF);
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/* Test that fread() sets errno if the stream was constructed with
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an invalid file descriptor. */
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FILE *fp = fdopen (-1, "r");
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ASSERT (fread (buf, 1, 1, fp) == 0);
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ASSERT (errno == EBADF);
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FILE *fp = fdopen (99, "r");
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ASSERT (fread (buf, 1, 1, fp) == 0);
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ASSERT (errno == EBADF);