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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) International Business Machines Corp., 2001
*
* 07/2001 Ported by Wayne Boyer
*/
/*\
* [Description]
*
* Testcase to test whether chroot(2) sets errno correctly.
*
* - to test whether chroot() is setting ENAMETOOLONG if the
* pathname is more than VFS_MAXNAMELEN.
* - to test whether chroot() is setting ENOTDIR if the argument
* is not a directory.
* - to test whether chroot() is setting ENOENT if the directory
* does not exist.
* - attempt to chroot to a path pointing to an invalid address
* and expect EFAULT as errno.
* - to test whether chroot() is setting ELOOP if the two
* symbolic directory who point to each other.
*/
#include <stdio.h>
#include "tst_test.h"
#define FILE_NAME "test_file"
#define LOOP_DIR "sym_dir1"
#define NONEXISTENT_DIR "does_not_exist"
static char *longname_dir;
static char *file_name;
static char *nonexistent_dir;
static char *bad_ptr;
static char *loop_dir;
static struct tcase {
char **dir;
int error;
char *desc;
} tcases[] = {
{&longname_dir, ENAMETOOLONG, "chroot(longer than VFS_MAXNAMELEN)"},
{&file_name, ENOTDIR, "chroot(not a directory)"},
{&nonexistent_dir, ENOENT, "chroot(does not exists)"},
{&bad_ptr, EFAULT, "chroot(an invalid address)"},
{&loop_dir, ELOOP, "chroot(symlink loop)"}
};
static void verify_chroot(unsigned int n)
{
struct tcase *tc = &tcases[n];
TST_EXP_FAIL(chroot(*tc->dir), tc->error, "%s", tc->desc);
}
static void setup(void)
{
SAFE_TOUCH(FILE_NAME, 0666, NULL);
bad_ptr = tst_get_bad_addr(NULL);
memset(longname_dir, 'a', PATH_MAX + 1);
longname_dir[PATH_MAX+1] = 0;
SAFE_SYMLINK("sym_dir1/", "sym_dir2");
SAFE_SYMLINK("sym_dir2/", "sym_dir1");
}
static struct tst_test test = {
.setup = setup,
.tcnt = ARRAY_SIZE(tcases),
.test = verify_chroot,
.needs_tmpdir = 1,
.bufs = (struct tst_buffers []) {
{&file_name, .str = FILE_NAME},
{&nonexistent_dir, .str = NONEXISTENT_DIR},
{&loop_dir, .str = LOOP_DIR},
{&longname_dir, .size = PATH_MAX+2},
{}
}
};
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