// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (c) International Business Machines Corp., 2001
 * Copyright (c) 2017 Cyril Hrubis <chrubis@suse.cz>
 */

/*
 * DESCRIPTION
 *	Testcase for testing that chdir(2) sets EACCES errno
 *
 * ALGORITHM
 *	1.	running as root, create a directory with perm 700
 *	2.	create a child process, sets its uid to nobody
 *	3.	this child attempts to chdir(2) to the directory created in 1
 *		and expects to get an EACCES.
 */

#include <pwd.h>
#include <errno.h>
#include <stdlib.h>
#include "tst_test.h"

#define DIRNAME "chdir03_dir"

static uid_t nobody_uid;

void verify_chdir(void)
{
	pid_t pid;

	pid = SAFE_FORK();
	if (!pid) {
		SAFE_SETUID(nobody_uid);

		TEST(chdir(DIRNAME));

		if (TST_RET != -1) {
			tst_res(TFAIL, "chdir() succeeded unexpectedly");
			return;
		}

		if (TST_ERR != EACCES) {
			tst_res(TFAIL | TTERRNO,
				"chdir() should fail with EACCES");
			return;
		}

		tst_res(TPASS | TTERRNO, "chdir() failed expectedly");
	}
}

void setup(void)
{
	struct passwd *pw;

	pw = SAFE_GETPWNAM("nobody");
	nobody_uid = pw->pw_uid;

	SAFE_MKDIR(DIRNAME, 0700);
}

static struct tst_test test = {
	.setup = setup,
	.test_all = verify_chdir,
	.needs_tmpdir = 1,
	.needs_root = 1,
	.forks_child = 1,
};