mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 05:00:15 +00:00
98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
/* Check static buffer handling with setvbuf (BZ #22415)
|
|
|
|
Copyright (C) 2017-2024 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 <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <wchar.h>
|
|
#include <mcheck.h>
|
|
|
|
#include <support/check.h>
|
|
#include <support/temp_file.h>
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
mtrace ();
|
|
|
|
char *temp_file;
|
|
TEST_VERIFY_EXIT (create_temp_file ("tst-bz22145.", &temp_file));
|
|
|
|
char buf[BUFSIZ];
|
|
|
|
{
|
|
/* Check if backup buffer is correctly freed and changing back
|
|
to normal buffer does not trigger an invalid free in case of
|
|
static buffer set by setvbuf. */
|
|
|
|
FILE *f = fopen (temp_file, "w+b");
|
|
TEST_VERIFY_EXIT (f != NULL);
|
|
|
|
TEST_VERIFY_EXIT (setvbuf (f, buf, _IOFBF, BUFSIZ) == 0);
|
|
TEST_VERIFY_EXIT (ungetc ('x', f) == 'x');
|
|
TEST_VERIFY_EXIT (fseek (f, 0L, SEEK_SET) == 0);
|
|
TEST_VERIFY_EXIT (fputc ('y', f) == 'y');
|
|
|
|
TEST_VERIFY_EXIT (fclose (f) == 0);
|
|
}
|
|
|
|
{
|
|
/* Check if backup buffer is correctly freed and changing back
|
|
to normal buffer does not trigger an invalid free in case of
|
|
static buffer set by setvbuf. */
|
|
|
|
FILE *f = fopen (temp_file, "w+b");
|
|
TEST_VERIFY_EXIT (f != NULL);
|
|
|
|
TEST_VERIFY_EXIT (setvbuf (f, buf, _IOFBF, BUFSIZ) == 0);
|
|
TEST_VERIFY_EXIT (ungetc ('x', f) == 'x');
|
|
TEST_VERIFY_EXIT (fputc ('y', f) == 'y');
|
|
|
|
TEST_VERIFY_EXIT (fclose (f) == 0);
|
|
}
|
|
|
|
{
|
|
FILE *f = fopen (temp_file, "w+b");
|
|
TEST_VERIFY_EXIT (f != NULL);
|
|
|
|
TEST_VERIFY_EXIT (setvbuf (f, buf, _IOFBF, BUFSIZ) == 0);
|
|
TEST_VERIFY_EXIT (ungetwc (L'x', f) == L'x');
|
|
TEST_VERIFY_EXIT (fseek (f, 0L, SEEK_SET) == 0);
|
|
TEST_VERIFY_EXIT (fputwc (L'y', f) == L'y');
|
|
|
|
TEST_VERIFY_EXIT (fclose (f) == 0);
|
|
}
|
|
|
|
{
|
|
FILE *f = fopen (temp_file, "w+b");
|
|
TEST_VERIFY_EXIT (f != NULL);
|
|
|
|
TEST_VERIFY_EXIT (setvbuf (f, buf, _IOFBF, BUFSIZ) == 0);
|
|
TEST_VERIFY_EXIT (ungetwc (L'x', f) == L'x');
|
|
TEST_VERIFY_EXIT (fputwc (L'y', f) == L'y');
|
|
|
|
TEST_VERIFY_EXIT (fclose (f) == 0);
|
|
}
|
|
|
|
free (temp_file);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|