mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 22:10:13 +00:00
04277e02d7
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/* Test the xreadlink function.
|
|
Copyright (C) 2017-2019 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <support/check.h>
|
|
#include <support/support.h>
|
|
#include <support/temp_file.h>
|
|
#include <support/xunistd.h>
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
char *dir = support_create_temp_directory ("tst-xreadlink-");
|
|
char *symlink_name = xasprintf ("%s/symlink", dir);
|
|
add_temp_file (symlink_name);
|
|
|
|
/* The limit 10000 is arbitrary and simply there to prevent an
|
|
attempt to exhaust all available disk space. */
|
|
for (int size = 1; size < 10000; ++size)
|
|
{
|
|
char *contents = xmalloc (size + 1);
|
|
for (int i = 0; i < size; ++i)
|
|
contents[i] = 'a' + (rand () % 26);
|
|
contents[size] = '\0';
|
|
if (symlink (contents, symlink_name) != 0)
|
|
{
|
|
if (errno == ENAMETOOLONG)
|
|
{
|
|
printf ("info: ENAMETOOLONG failure at %d bytes\n", size);
|
|
free (contents);
|
|
break;
|
|
}
|
|
FAIL_EXIT1 ("symlink (%d bytes): %m", size);
|
|
}
|
|
|
|
char *readlink_result = xreadlink (symlink_name);
|
|
TEST_VERIFY (strcmp (readlink_result, contents) == 0);
|
|
free (readlink_result);
|
|
xunlink (symlink_name);
|
|
free (contents);
|
|
}
|
|
|
|
/* Create an empty file to suppress the temporary file deletion
|
|
warning. */
|
|
xclose (xopen (symlink_name, O_WRONLY | O_CREAT, 0));
|
|
|
|
free (symlink_name);
|
|
free (dir);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|