// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
 *
 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 * Mountain View, CA  94043, or:
 *
 * http://www.sgi.com
 *
 * For further information regarding this notice, see:
 *
 * http://oss.sgi.com/projects/GenInfo/NoticeExplan/
 *
 * Author: William Roske
 * Co-pilot: Dave Fenner
 */

/*\
 * [Description]
 *
 * Verify the basic functionality of setregid(2) system call.
 */

#include "tst_test.h"
#include "compat_tst_16.h"

static gid_t gid, egid;
static gid_t neg_one = -1;

static struct tcase {
	gid_t *arg1;
	gid_t *arg2;
	const char *msg;
} tcases[] = {
	{&neg_one, &neg_one, "Leave real and effective both gids unchanged" },
	{&neg_one, &egid,    "Change effective to effective gid" },
	{&gid,     &neg_one, "Change real to real gid" },
	{&neg_one, &gid,     "Change effective to real gid" },
	{&gid,     &gid,     "Change real and effective both gids to current real gid" }
};

static void run(unsigned int n)
{
	struct tcase *tc = &tcases[n];

	TST_EXP_PASS(SETREGID(*tc->arg1, *tc->arg2), "%s:", tc->msg);
}

static void setup(void)
{
	gid = getgid();
	GID16_CHECK(gid, setregid);

	egid = getegid();
	GID16_CHECK(egid, setregid);
}

static struct tst_test test = {
	.tcnt = ARRAY_SIZE(tcases),
	.test = run,
	.setup = setup,
};