61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
/* Test that _IO_wfile_sync does not crash (bug 20568).
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Copyright (C) 2019-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <fcntl.h>
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#include <locale.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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#include <support/check.h>
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#include <support/xstdio.h>
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#include <support/xunistd.h>
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#include <support/temp_file.h>
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static const char test_data[] = "This is a test of _IO_wfile_sync.";
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static int
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do_test (void)
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{
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static char *infile;
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int infd;
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FILE *infp;
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infd = create_temp_file ("tst-wfile-sync-in-", &infile);
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xwrite (infd, test_data, strlen (test_data));
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xclose (infd);
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infd = xopen (infile, O_RDONLY, 0);
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infp = fdopen (infd, "r");
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TEST_VERIFY_EXIT (setlocale (LC_ALL, "de_DE.UTF-8") != NULL);
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/* Fill the stdio buffer and advance the read pointer. */
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TEST_VERIFY_EXIT (fgetwc (infp) != WEOF);
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/* This calls _IO_wfile_sync, it should not crash. */
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TEST_VERIFY_EXIT (setvbuf (infp, NULL, _IONBF, 0) == 0);
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/* Verify that the external file offset has been synchronized. */
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TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 1);
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fclose (infp);
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free (infile);
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return 0;
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}
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#include <support/test-driver.c>
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