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/* Test that asprintf sets the buffer pointer to NULL on failure.
Copyright (C) 2024-2025 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>
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