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stdio-common/tst-fclose-devzero.c
50 строк
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Paul Eggert
Update copyright dates with scripts/update-copyrights
02 янв 2026, 00:42
02 янв 2026, 00:42
66f3e92
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/* Test that always-zero lseek does not cause fclose failure after fread. Copyright (C) 2025-2026 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ #include <errno.h> #include <stdio.h> #include <string.h> #include <support/check.h> #include <support/xstdio.h> int do_test (void) { for (int do_ftello = 0; do_ftello < 2; ++do_ftello) { FILE *fp = xfopen ("/dev/zero", "r"); char buf[17]; memset (buf, 0xcc, sizeof (buf)); xfread (buf, 1, sizeof (buf), fp); static const char zeros[sizeof (buf)] = { 0 }; TEST_COMPARE_BLOB (buf, sizeof (buf), zeros, sizeof (zeros)); if (do_ftello) { errno = 0; TEST_COMPARE (ftello (fp), -1); TEST_COMPARE (errno, ESPIPE); } /* Do not use xfclose because it flushes first. */ TEST_COMPARE (fclose (fp), 0); } return 0; } #include <support/test-driver.c>