mirror of git://sourceware.org/git/glibc.git
60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
/* Test fseek on files using mmap (bug 32529).
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Copyright (C) 2025 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 <stdio.h>
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#include <support/check.h>
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#include <support/temp_file.h>
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#include <support/xstdio.h>
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#include <support/xunistd.h>
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int
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do_test (void)
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{
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char *filename = NULL;
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int fd = create_temp_file ("tst-fseek-mmap", &filename);
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TEST_VERIFY_EXIT (fd != -1);
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xclose (fd);
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/* Test fseek after ungetc (bug 32529). */
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FILE *fp = xfopen (filename, "w");
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TEST_VERIFY (0 <= fputs ("test", fp));
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xfclose (fp);
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fp = xfopen (filename, "rm");
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TEST_COMPARE (fgetc (fp), 't');
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TEST_COMPARE (ungetc ('u', fp), 'u');
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TEST_COMPARE (fseek (fp, 0, SEEK_CUR), 0);
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xfclose (fp);
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/* Test fseek positioning after fflush (another issue covered by the
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same fix). */
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fp = xfopen (filename, "rm");
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TEST_COMPARE (fgetc (fp), 't');
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TEST_COMPARE (fflush (fp), 0);
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TEST_COMPARE (ftell (fp), 1);
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TEST_COMPARE (fseek (fp, 0, SEEK_CUR), 0);
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TEST_COMPARE (ftell (fp), 1);
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TEST_COMPARE (fgetc (fp), 'e');
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xfclose (fp);
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return 0;
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}
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#include <support/test-driver.c>
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