path: root/tools/testing/selftests/kdbus/kdbus-test.c

#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stddef.h>
#include <time.h>
#include <unistd.h>
#include <stdint.h>
#include <assert.h>
#include <getopt.h>
#include <stdbool.h>
#include <signal.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/wait.h>
#include <sys/syscall.h>
#include <sys/eventfd.h>
#include <linux/sched.h>

#include "kdbus-util.h"
#include "kdbus-enum.h"
#include "kdbus-test.h"

enum {
	TEST_CREATE_BUS		= 1 << 0,
	TEST_CREATE_CONN	= 1 << 1,
};

struct kdbus_test {
	const char *name;
	const char *desc;
	int (*func)(struct kdbus_test_env *env);
	unsigned int flags;
};

struct kdbus_test_args {
	bool mntns;
	bool pidns;
	bool userns;
	char *uid_map;
	char *gid_map;
	int loop;
	int wait;
	int fork;
	int tap_output;
	char *module;
	char *root;
	char *test;
	char *busname;
};

static const struct kdbus_test tests[] = {
	{
		.name	= "bus-make",
		.desc	= "bus make functions",
		.func	= kdbus_test_bus_make,
		.flags	= 0,
	},
	{
		.name	= "hello",
		.desc	= "the HELLO command",
		.func	= kdbus_test_hello,
		.flags	= TEST_CREATE_BUS,
	},
	{
		.name	= "byebye",
		.desc	= "the BYEBYE command",
		.func	= kdbus_test_byebye,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "chat",
		.desc	= "a chat pattern",
		.func	= kdbus_test_chat,
		.flags	= TEST_CREATE_BUS,
	},
	{
		.name	= "daemon",
		.desc	= "a simple daemon",
		.func	= kdbus_test_daemon,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "fd-passing",
		.desc	= "file descriptor passing",
		.func	= kdbus_test_fd_passing,
		.flags	= TEST_CREATE_BUS,
	},
	{
		.name	= "endpoint",
		.desc	= "custom endpoint",
		.func	= kdbus_test_custom_endpoint,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "monitor",
		.desc	= "monitor functionality",
		.func	= kdbus_test_monitor,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "name-basics",
		.desc	= "basic name registry functions",
		.func	= kdbus_test_name_basic,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "name-conflict",
		.desc	= "name registry conflict details",
		.func	= kdbus_test_name_conflict,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "name-queue",
		.desc	= "queuing of names",
		.func	= kdbus_test_name_queue,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "message-basic",
		.desc	= "basic message handling",
		.func	= kdbus_test_message_basic,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "message-prio",
		.desc	= "handling of messages with priority",
		.func	= kdbus_test_message_prio,
		.flags	= TEST_CREATE_BUS,
	},
	{
		.name	= "message-quota",
		.desc	= "message quotas are enforced",
		.func	= kdbus_test_message_quota,
		.flags	= TEST_CREATE_BUS,
	},
	{
		.name	= "memory-access",
		.desc	= "memory access",
		.func	= kdbus_test_memory_access,
		.flags	= TEST_CREATE_BUS,
	},
	{
		.name	= "timeout",
		.desc	= "timeout",
		.func	= kdbus_test_timeout,
		.flags	= TEST_CREATE_BUS,
	},
	{
		.name	= "sync-byebye",
		.desc	= "synchronous replies vs. BYEBYE",
		.func	= kdbus_test_sync_byebye,
		.flags	= TEST_CREATE_BUS,
	},
	{
		.name	= "sync-reply",
		.desc	= "synchronous replies",
		.func	= kdbus_test_sync_reply,
		.flags	= TEST_CREATE_BUS,
	},
	{
		.name	= "message-free",
		.desc	= "freeing of memory",
		.func	= kdbus_test_free,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "connection-info",
		.desc	= "retrieving connection information",
		.func	= kdbus_test_conn_info,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "connection-update",
		.desc	= "updating connection information",
		.func	= kdbus_test_conn_update,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "writable-pool",
		.desc	= "verifying pools are never writable",
		.func	= kdbus_test_writable_pool,
		.flags	= TEST_CREATE_BUS,
	},
	{
		.name	= "policy",
		.desc	= "policy",
		.func	= kdbus_test_policy,
		.flags	= TEST_CREATE_BUS,
	},
	{
		.name	= "policy-priv",
		.desc	= "unprivileged bus access",
		.func	= kdbus_test_policy_priv,
		.flags	= TEST_CREATE_BUS,
	},
	{
		.name	= "policy-ns",
		.desc	= "policy in user namespaces",
		.func	= kdbus_test_policy_ns,
		.flags	= TEST_CREATE_BUS,
	},
	{
		.name	= "metadata-ns",
		.desc	= "metadata in different namespaces",
		.func	= kdbus_test_metadata_ns,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "match-id-add",
		.desc	= "adding of matches by id",
		.func	= kdbus_test_match_id_add,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "match-id-remove",
		.desc	= "removing of matches by id",
		.func	= kdbus_test_match_id_remove,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "match-replace",
		.desc	= "replace of matches with the same cookie",
		.func	= kdbus_test_match_replace,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "match-name-add",
		.desc	= "adding of matches by name",
		.func	= kdbus_test_match_name_add,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "match-name-remove",
		.desc	= "removing of matches by name",
		.func	= kdbus_test_match_name_remove,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "match-name-change",
		.desc	= "matching for name changes",
		.func	= kdbus_test_match_name_change,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "match-bloom",
		.desc	= "matching with bloom filters",
		.func	= kdbus_test_match_bloom,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "activator",
		.desc	= "activator connections",
		.func	= kdbus_test_activator,
		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
	},
	{
		.name	= "benchmark",
		.desc	= "benchmark",
		.func	= kdbus_test_benchmark,
		.flags	= TEST_CREATE_BUS,
	},
	{
		.name	= "benchmark-nomemfds",
		.desc	= "benchmark without using memfds",
		.func	= kdbus_test_benchmark_nomemfds,
		.flags	= TEST_CREATE_BUS,
	},
	{
		.name	= "benchmark-uds",
		.desc	= "benchmark comparison to UDS",
		.func	= kdbus_test_benchmark_uds,
		.flags	= TEST_CREATE_BUS,
	},
};

#define N_TESTS ((int) (sizeof(tests) / sizeof(tests[0])))

static int test_prepare_env(const struct kdbus_test *t,
			    const struct kdbus_test_args *args,
			    struct kdbus_test_env *env)
{
	if (t->flags & TEST_CREATE_BUS) {
		char *s;
		char *n = NULL;
		int ret;

		asprintf(&s, "%s/control", args->root);

		env->control_fd = open(s, O_RDWR);
		free(s);
		ASSERT_RETURN(env->control_fd >= 0);

		if (!args->busname) {
			n = unique_name("test-bus");
			ASSERT_RETURN(n);
		}

		ret = kdbus_create_bus(env->control_fd,
				       args->busname ?: n,
				       _KDBUS_ATTACH_ALL, &s);
		free(n);
		ASSERT_RETURN(ret == 0);

		asprintf(&env->buspath, "%s/%s/bus", args->root, s);
		free(s);
	}

	if (t->flags & TEST_CREATE_CONN) {
		env->conn = kdbus_hello(env->buspath, 0, NULL, 0);
		ASSERT_RETURN(env->conn);
	}

	env->root = args->root;
	env->module = args->module;

	return 0;
}

void test_unprepare_env(const struct kdbus_test *t, struct kdbus_test_env *env)
{
	if (env->conn) {
		kdbus_conn_free(env->conn);
		env->conn = NULL;
	}

	if (env->control_fd >= 0) {
		close(env->control_fd);
		env->control_fd = -1;
	}

	if (env->buspath) {
		free(env->buspath);
		env->buspath = NULL;
	}
}

static int test_run(const struct kdbus_test *t,
		    const struct kdbus_test_args *kdbus_args,
		    int wait)
{
	int ret;
	struct kdbus_test_env env = {};

	ret = test_prepare_env(t, kdbus_args, &env);
	if (ret != TEST_OK)
		return ret;

	if (wait > 0) {
		printf("Sleeping %d seconds before running test ...\n", wait);
		sleep(wait);
	}

	ret = t->func(&env);
	test_unprepare_env(t, &env);
	return ret;
}

static int test_run_forked(const struct kdbus_test *t,
			   const struct kdbus_test_args *kdbus_args,
			   int wait)
{
	int ret;
	pid_t pid;

	pid = fork();
	if (pid < 0) {
		return TEST_ERR;
	} else if (pid == 0) {
		ret = test_run(t, kdbus_args, wait);
		_exit(ret);
	}

	pid = waitpid(pid, &ret, 0);
	if (pid <= 0)
		return TEST_ERR;
	else if (!WIFEXITED(ret))
		return TEST_ERR;
	else
		return WEXITSTATUS(ret);
}

static void print_test_result(int ret)
{
	switch (ret) {
	case TEST_OK:
		printf("OK");
		break;
	case TEST_SKIP:
		printf("SKIPPED");
		break;
	case TEST_ERR:
		printf("ERROR");
		break;
	}
}

static int start_all_tests(struct kdbus_test_args *kdbus_args)
{
	int ret;
	unsigned int fail_cnt = 0;
	unsigned int skip_cnt = 0;
	unsigned int ok_cnt = 0;
	unsigned int i;

	if (kdbus_args->tap_output) {
		printf("1..%d\n", N_TESTS);
		fflush(stdout);
	}

	kdbus_util_verbose = false;

	for (i = 0; i < N_TESTS; i++) {
		const struct kdbus_test *t = tests + i;

		if (!kdbus_args->tap_output) {
			unsigned int n;

			printf("Testing %s (%s) ", t->desc, t->name);
			for (n = 0; n < 60 - strlen(t->desc) - strlen(t->name); n++)
				printf(".");
			printf(" ");
		}

		ret = test_run_forked(t, kdbus_args, 0);
		switch (ret) {
		case TEST_OK:
			ok_cnt++;
			break;
		case TEST_SKIP:
			skip_cnt++;
			break;
		case TEST_ERR:
			fail_cnt++;
			break;
		}

		if (kdbus_args->tap_output) {
			printf("%sok %d - %s%s (%s)\n",
			       (ret == TEST_ERR) ? "not " : "", i + 1,
			       (ret == TEST_SKIP) ? "# SKIP " : "",
			       t->desc, t->name);
			fflush(stdout);
		} else {
			print_test_result(ret);
			printf("\n");
		}
	}

	if (kdbus_args->tap_output)
		printf("Failed %d/%d tests, %.2f%% okay\n", fail_cnt, N_TESTS,
		       100.0 - (fail_cnt * 100.0) / ((float) N_TESTS));
	else
		printf("\nSUMMARY: %u tests passed, %u skipped, %u failed\n",
		       ok_cnt, skip_cnt, fail_cnt);

	return fail_cnt > 0 ? TEST_ERR : TEST_OK;
}

static int start_one_test(struct kdbus_test_args *kdbus_args)
{
	int i, ret;
	bool test_found = false;

	for (i = 0; i < N_TESTS; i++) {
		const struct kdbus_test *t = tests + i;

		if (strcmp(t->name, kdbus_args->test))
			continue;

		do {
			test_found = true;
			if (kdbus_args->fork)
				ret = test_run_forked(t, kdbus_args,
						      kdbus_args->wait);
			else
				ret = test_run(t, kdbus_args,
					       kdbus_args->wait);

			printf("Testing %s: ", t->desc);
			print_test_result(ret);
			printf("\n");

			if (ret != TEST_OK)
				break;
		} while (kdbus_args->loop);

		return ret;
	}

	if (!test_found) {
		printf("Unknown test-id '%s'\n", kdbus_args->test);
		return TEST_ERR;
	}

	return TEST_OK;
}

static void usage(const char *argv0)
{
	unsigned int i, j;

	printf("Usage: %s [options]\n"
	       "Options:\n"
	       "\t-a, --tap		Output test results in TAP format\n"
	       "\t-m, --module <module>	Kdbus module name\n"
	       "\t-x, --loop		Run in a loop\n"
	       "\t-f, --fork		Fork before running a test\n"
	       "\t-h, --help		Print this help\n"
	       "\t-r, --root <root>	Toplevel of the kdbus hierarchy\n"
	       "\t-t, --test <test-id>	Run one specific test only, in verbose mode\n"
	       "\t-b, --bus <busname>	Instead of generating a random bus name, take <busname>.\n"
	       "\t-w, --wait <secs>	Wait <secs> before actually starting test\n"
	       "\t    --mntns		New mount namespace\n"
	       "\t    --pidns		New PID namespace\n"
	       "\t    --userns		New user namespace\n"
	       "\t    --uidmap uid_map	UID map for user namespace\n"
	       "\t    --gidmap gid_map	GID map for user namespace\n"
	       "\n", argv0);

	printf("By default, all test are run once, and a summary is printed.\n"
	       "Available tests for --test:\n\n");

	for (i = 0; i < N_TESTS; i++) {
		const struct kdbus_test *t = tests + i;

		printf("\t%s", t->name);

		for (j = 0; j < 24 - strlen(t->name); j++)
			printf(" ");

		printf("Test %s\n", t->desc);
	}

	printf("\n");
	printf("Note that some tests may, if run specifically by --test, "
	       "behave differently, and not terminate by themselves.\n");

	exit(EXIT_FAILURE);
}

void print_kdbus_test_args(struct kdbus_test_args *args)
{
	if (args->userns || args->pidns || args->mntns)
		printf("# Starting tests in new %s%s%s namespaces%s\n",
			args->mntns ? "MOUNT " : "",
			args->pidns ? "PID " : "",
			args->userns ? "USER " : "",
			args->mntns ? ", kdbusfs will be remounted" : "");
	else
		printf("# Starting tests in the same namespaces\n");
}

void print_metadata_support(void)
{
	bool no_meta_audit, no_meta_cgroups, no_meta_seclabel;

	/*
	 * KDBUS_ATTACH_CGROUP, KDBUS_ATTACH_AUDIT and
	 * KDBUS_ATTACH_SECLABEL
	 */
	no_meta_audit = !config_auditsyscall_is_enabled();
	no_meta_cgroups = !config_cgroups_is_enabled();
	no_meta_seclabel = !config_security_is_enabled();

	if (no_meta_audit | no_meta_cgroups | no_meta_seclabel)
		printf("# Starting tests without %s%s%s metadata support\n",
		       no_meta_audit ? "AUDIT " : "",
		       no_meta_cgroups ? "CGROUP " : "",
		       no_meta_seclabel ? "SECLABEL " : "");
	else
		printf("# Starting tests with full metadata support\n");
}

int run_tests(struct kdbus_test_args *kdbus_args)
{
	int ret;
	static char control[4096];

	snprintf(control, sizeof(control), "%s/control", kdbus_args->root);

	if (access(control, W_OK) < 0) {
		printf("Unable to locate control node at '%s'.\n",
			control);
		return TEST_ERR;
	}

	if (kdbus_args->test) {
		ret = start_one_test(kdbus_args);
	} else {
		do {
			ret = start_all_tests(kdbus_args);
			if (ret != TEST_OK)
				break;
		} while (kdbus_args->loop);
	}

	return ret;
}

static void nop_handler(int sig) {}

static int test_prepare_mounts(struct kdbus_test_args *kdbus_args)
{
	int ret;
	char kdbusfs[64] = {'\0'};

	snprintf(kdbusfs, sizeof(kdbusfs), "%sfs", kdbus_args->module);

	/* make current mount slave */
	ret = mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL);
	if (ret < 0) {
		ret = -errno;
		printf("error mount() root: %d (%m)\n", ret);
		return ret;
	}

	/* Remount procfs since we need it in our tests */
	if (kdbus_args->pidns) {
		ret = mount("proc", "/proc", "proc",
			    MS_NOSUID|MS_NOEXEC|MS_NODEV, NULL);
		if (ret < 0) {
			ret = -errno;
			printf("error mount() /proc : %d (%m)\n", ret);
			return ret;
		}
	}

	/* Remount kdbusfs */
	ret = mount(kdbusfs, kdbus_args->root, kdbusfs,
		    MS_NOSUID|MS_NOEXEC|MS_NODEV, NULL);
	if (ret < 0) {
		ret = -errno;
		printf("error mount() %s :%d (%m)\n", kdbusfs, ret);
		return ret;
	}

	return 0;
}

int run_tests_in_namespaces(struct kdbus_test_args *kdbus_args)
{
	int ret;
	int efd = -1;
	int status;
	pid_t pid, rpid;
	struct sigaction oldsa;
	struct sigaction sa = {
		.sa_handler = nop_handler,
		.sa_flags = SA_NOCLDSTOP,
	};

	efd = eventfd(0, EFD_CLOEXEC);
	if (efd < 0) {
		ret = -errno;
		printf("eventfd() failed: %d (%m)\n", ret);
		return TEST_ERR;
	}

	ret = sigaction(SIGCHLD, &sa, &oldsa);
	if (ret < 0) {
		ret = -errno;
		printf("sigaction() failed: %d (%m)\n", ret);
		return TEST_ERR;
	}

	/* setup namespaces */
	pid = syscall(__NR_clone, SIGCHLD|
		      (kdbus_args->userns ? CLONE_NEWUSER : 0) |
		      (kdbus_args->mntns ? CLONE_NEWNS : 0) |
		      (kdbus_args->pidns ? CLONE_NEWPID : 0), NULL);
	if (pid < 0) {
		printf("clone() failed: %d (%m)\n", -errno);
		return TEST_ERR;
	}

	if (pid == 0) {
		eventfd_t event_status = 0;

		ret = prctl(PR_SET_PDEATHSIG, SIGKILL);
		if (ret < 0) {
			ret = -errno;
			printf("error prctl(): %d (%m)\n", ret);
			_exit(TEST_ERR);
		}

		/* reset sighandlers of childs */
		ret = sigaction(SIGCHLD, &oldsa, NULL);
		if (ret < 0) {
			ret = -errno;
			printf("sigaction() failed: %d (%m)\n", ret);
			_exit(TEST_ERR);
		}

		ret = eventfd_read(efd, &event_status);
		if (ret < 0 || event_status != 1) {
			printf("error eventfd_read()\n");
			_exit(TEST_ERR);
		}

		if (kdbus_args->mntns) {
			ret = test_prepare_mounts(kdbus_args);
			if (ret < 0) {
				printf("error preparing mounts\n");
				_exit(TEST_ERR);
			}
		}

		ret = run_tests(kdbus_args);
		_exit(ret);
	}

	/* Setup userns mapping */
	if (kdbus_args->userns) {
		ret = userns_map_uid_gid(pid, kdbus_args->uid_map,
					 kdbus_args->gid_map);
		if (ret < 0) {
			printf("error mapping uid and gid in userns\n");
			eventfd_write(efd, 2);
			return TEST_ERR;
		}
	}

	ret = eventfd_write(efd, 1);
	if (ret < 0) {
		ret = -errno;
		printf("error eventfd_write(): %d (%m)\n", ret);
		return TEST_ERR;
	}

	rpid = waitpid(pid, &status, 0);
	ASSERT_RETURN_VAL(rpid == pid, TEST_ERR);

	close(efd);

	if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
		return TEST_ERR;

	return TEST_OK;
}

int start_tests(struct kdbus_test_args *kdbus_args)
{
	int ret;
	bool namespaces;
	static char fspath[4096];

	namespaces = (kdbus_args->mntns || kdbus_args->pidns ||
		      kdbus_args->userns);

	/* for pidns we need mntns set */
	if (kdbus_args->pidns && !kdbus_args->mntns) {
		printf("Failed: please set both pid and mnt namesapces\n");
		return TEST_ERR;
	}

	if (kdbus_args->userns) {
		if (!config_user_ns_is_enabled()) {
			printf("User namespace not supported\n");
			return TEST_ERR;
		}

		if (!kdbus_args->uid_map || !kdbus_args->gid_map) {
			printf("Failed: please specify uid or gid mapping\n");
			return TEST_ERR;
		}
	}

	print_kdbus_test_args(kdbus_args);
	print_metadata_support();

	/* setup kdbus paths */
	if (!kdbus_args->module)
		kdbus_args->module = "kdbus";

	if (!kdbus_args->root) {
		snprintf(fspath, sizeof(fspath), "/sys/fs/%s",
			 kdbus_args->module);
		kdbus_args->root = fspath;
	}

	/* Start tests */
	if (namespaces)
		ret = run_tests_in_namespaces(kdbus_args);
	else
		ret = run_tests(kdbus_args);

	return ret;
}

int main(int argc, char *argv[])
{
	int t, ret = 0;
	struct kdbus_test_args *kdbus_args;
	enum {
		ARG_MNTNS = 0x100,
		ARG_PIDNS,
		ARG_USERNS,
		ARG_UIDMAP,
		ARG_GIDMAP,
	};

	kdbus_args = malloc(sizeof(*kdbus_args));
	if (!kdbus_args) {
		printf("unable to malloc() kdbus_args\n");
		return EXIT_FAILURE;
	}

	memset(kdbus_args, 0, sizeof(*kdbus_args));

	static const struct option options[] = {
		{ "loop",	no_argument,		NULL, 'x' },
		{ "help",	no_argument,		NULL, 'h' },
		{ "root",	required_argument,	NULL, 'r' },
		{ "test",	required_argument,	NULL, 't' },
		{ "bus",	required_argument,	NULL, 'b' },
		{ "wait",	required_argument,	NULL, 'w' },
		{ "fork",	no_argument,		NULL, 'f' },
		{ "module",	required_argument,	NULL, 'm' },
		{ "tap",	no_argument,		NULL, 'a' },
		{ "mntns",	no_argument,		NULL, ARG_MNTNS },
		{ "pidns",	no_argument,		NULL, ARG_PIDNS },
		{ "userns",	no_argument,		NULL, ARG_USERNS },
		{ "uidmap",	required_argument,	NULL, ARG_UIDMAP },
		{ "gidmap",	required_argument,	NULL, ARG_GIDMAP },
		{}
	};

	srand(time(NULL));

	while ((t = getopt_long(argc, argv, "hxfm:r:t:b:w:a", options, NULL)) >= 0) {
		switch (t) {
		case 'x':
			kdbus_args->loop = 1;
			break;

		case 'm':
			kdbus_args->module = optarg;
			break;

		case 'r':
			kdbus_args->root = optarg;
			break;

		case 't':
			kdbus_args->test = optarg;
			break;

		case 'b':
			kdbus_args->busname = optarg;
			break;

		case 'w':
			kdbus_args->wait = strtol(optarg, NULL, 10);
			break;

		case 'f':
			kdbus_args->fork = 1;
			break;

		case 'a':
			kdbus_args->tap_output = 1;
			break;

		case ARG_MNTNS:
			kdbus_args->mntns = true;
			break;

		case ARG_PIDNS:
			kdbus_args->pidns = true;
			break;

		case ARG_USERNS:
			kdbus_args->userns = true;
			break;

		case ARG_UIDMAP:
			kdbus_args->uid_map = optarg;
			break;

		case ARG_GIDMAP:
			kdbus_args->gid_map = optarg;
			break;

		default:
		case 'h':
			usage(argv[0]);
		}
	}

	ret = start_tests(kdbus_args);
	if (ret == TEST_ERR)
		return EXIT_FAILURE;

	free(kdbus_args);

	return 0;
}