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/* Regression test for 20632.
Copyright (C) 2024 Free Software Foundation, Inc.
Copyright The GNU Toolchain Authors.
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 <stdlib.h>
#include <support/check.h>
#include <support/xunistd.h>
#include <unistd.h>
#ifndef WIDE
# define TEST_NAME "fputs-unbuffered-full"
# define CHAR char
# define FPUTS fputs
# define TEXT "0123456789ABCDEF"
#else
# include <wchar.h>
# define TEST_NAME "fputws-unbuffered-full"
# define CHAR wchar_t
# define FPUTS fputws
# define TEXT L"0123456789ABCDEF"
#endif /* WIDE */
static int
do_test (void)
{
/* Open an unbuffered stream to /dev/full. */
FILE *fp = fopen ("/dev/full", "w");
TEST_VERIFY_EXIT (fp != NULL);
int ret = setvbuf (fp, NULL, _IONBF, 0);
TEST_VERIFY_EXIT (ret == 0);
/* Output a long string. */
const int sz = 4096;
CHAR *buff = calloc (sz+1, sizeof *buff);
for (int i=0; i < sz; i++)
buff[i] = (CHAR) 'x';
buff[sz] = (CHAR) '\0';
errno = 0;
ret = FPUTS (buff, fp);
TEST_VERIFY (ret == EOF);
TEST_VERIFY (errno == ENOSPC);
free (buff);
/* Output shorter strings. */
for (int i=0; i < 1024; i++)
{
errno = 0;
ret = FPUTS (TEXT, fp);
TEST_VERIFY (ret == EOF);
TEST_VERIFY (errno == ENOSPC);
/* Call malloc, triggering a crash if its
function pointers have been overwritten. */
void *volatile ptr = malloc (1);
free (ptr);
}
return 0;
}
#include <support/test-driver.c>
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