testcases/kernel/syscalls/syscall/syscall01.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (c) International Business Machines Corp., 2002
 * 01/02/2003	Port to LTP avenkat@us.ibm.com
 * 06/30/2001	Port to Linux nsharoff@us.ibm.com
 */

/*
 * Basic test for syscall().
 */

#define _GNU_SOURCE
#include <unistd.h>
#include <sys/syscall.h>
#include <sys/types.h>

#include "tst_test.h"
#include "lapi/syscalls.h"

static void verify_getpid(void)
{
	pid_t p1, p2;

	p1 = getpid();
	p2 = syscall(SYS_getpid);

	if (p1 == p2) {
		tst_res(TPASS, "getpid() == syscall(SYS_getpid)");
	} else {
		tst_res(TFAIL, "getpid() = %i, syscall(SYS_getpid) = %i",
			p1, p2);
	}
}

static void verify_getuid(void)
{
	uid_t u1, u2;

	u1 = getuid();
	u2 = syscall(SYS_getuid);

	if (u1 == u2) {
		tst_res(TPASS, "getuid() == syscall(SYS_getuid)");
	} else {
		tst_res(TFAIL, "getuid() = %i, syscall(SYS_getuid) = %i",
			u1, u2);
	}
}

static void verify_getgid(void)
{
	gid_t g1, g2;

	g1 = getgid();
	g2 = syscall(SYS_getgid);

	if (g1 == g2) {
		tst_res(TPASS, "getgid() == syscall(SYS_getgid)");
	} else {
		tst_res(TFAIL, "getgid() = %i, syscall(SYS_getgid) = %i",
			g1, g2);
	}
}


static void (*tcases[])(void) = {
	verify_getpid,
	verify_getuid,
	verify_getgid,
};

static void verify_syscall(unsigned int n)
{
	tcases[n]();
}

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