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/* Test of fseeko() 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 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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main (int argc, char **argv)
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const char *filename = argv[1];
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/* Test that fseeko() 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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setvbuf (fp, NULL, _IONBF, 0);
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ASSERT (ftell (fp) == 0);
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ASSERT (fseeko (fp, 0, SEEK_END) == 0);
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ASSERT (ftell (fp) > 0);
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ASSERT (close (fileno (fp)) == 0);
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ASSERT (fseeko (fp, 0, SEEK_SET) == -1);
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ASSERT (errno == EBADF);
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/* Test that fseeko() sets errno if the stream was constructed with
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an invalid file descriptor. */
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FILE *fp = fdopen (-1, "w");
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ASSERT (fseeko (fp, 0, SEEK_END) == -1);
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ASSERT (errno == EBADF);
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FILE *fp = fdopen (99, "w");
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ASSERT (fseeko (fp, 0, SEEK_END) == -1);
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ASSERT (errno == EBADF);