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libio/tst-asprintf-null.c
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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 asprintf sets the buffer pointer to NULL on failure. Copyright (C) 2024-2026 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 <support/check.h> #include <sys/resource.h> static int do_test (void) { static const char sentinel[] = "sentinel"; char *buf = (char *) sentinel; { /* Avoid -Wformat-overflow warning. */ const char *volatile format = "%2000000000d %2000000000d"; TEST_COMPARE (asprintf (&buf, format, 1, 2), -1); } if (errno != ENOMEM) TEST_COMPARE (errno, EOVERFLOW); TEST_VERIFY (buf == NULL); /* Force ENOMEM in the test below. */ struct rlimit rl; TEST_COMPARE (getrlimit (RLIMIT_AS, &rl), 0); rl.rlim_cur = 10 * 1024 * 1024; TEST_COMPARE (setrlimit (RLIMIT_AS, &rl), 0); buf = (char *) sentinel; TEST_COMPARE (asprintf (&buf, "%20000000d", 1), -1); TEST_COMPARE (errno, ENOMEM); TEST_VERIFY (buf == NULL); return 0; } #include <support/test-driver.c>