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