/*
 * Copyright (C) 2012  ProFUSION embedded systems
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <dirent.h>
#include <errno.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/utsname.h>
#include <libkmod.h>

#include "testsuite.h"


#define TEST_UNAME "4.0.20-kmod"
static int testsuite_uname(const struct test *t)
{
	struct utsname u;
	int err = uname(&u);

	if (err < 0)
		exit(EXIT_FAILURE);

	if (strcmp(u.release, TEST_UNAME) != 0) {
		char *ldpreload = getenv("LD_PRELOAD");
		ERR("u.release=%s should be %s\n", u.release, TEST_UNAME);
		ERR("LD_PRELOAD=%s\n", ldpreload);
		exit(EXIT_FAILURE);
	}

	exit(EXIT_SUCCESS);
}
static const struct test stestsuite_uname = {
	.name = "testsuite_uname",
	.description = "test if trap to uname() works",
	.func = testsuite_uname,
	.config = {
		[TC_UNAME_R] = TEST_UNAME,
	},
	.need_spawn = true,
};

static int testsuite_rootfs_fopen(const struct test *t)
{
	FILE *fp;
	char s[100];
	int n;

	fp = fopen("/lib/modules/a", "r");
	if (fp == NULL)
		return EXIT_FAILURE;;

	n = fscanf(fp, "%s", s);
	if (n != 1)
		return EXIT_FAILURE;

	if (strcmp(s, "kmod-test-chroot-works") != 0)
		return EXIT_FAILURE;

	return EXIT_SUCCESS;
}
static const struct test stestsuite_rootfs_fopen = {
	.name = "testsuite_rootfs_fopen",
	.description = "test if rootfs works - fopen()",
	.func = testsuite_rootfs_fopen,
	.config = {
		[TC_ROOTFS] = TESTSUITE_ROOTFS "test-rootfs/",
	},
	.need_spawn = true,
};

static int testsuite_rootfs_open(const struct test *t)
{
	char buf[100];
	int fd, done;

	fd = open("/lib/modules/a", O_RDONLY);
	if (fd < 0)
		return EXIT_FAILURE;

	for (done = 0;;) {
		int r = read(fd, buf + done, sizeof(buf) - 1 - done);
		if (r == 0)
			break;
		if (r == -EWOULDBLOCK || r == -EAGAIN)
			continue;

		done += r;
	}

	buf[done] = '\0';

	if (strcmp(buf, "kmod-test-chroot-works\n") != 0)
		return EXIT_FAILURE;

	return EXIT_SUCCESS;
}
static const struct test stestsuite_rootfs_open = {
	.name = "testsuite_rootfs_open",
	.description = "test if rootfs works - open()",
	.func = testsuite_rootfs_open,
	.config = {
		[TC_ROOTFS] = TESTSUITE_ROOTFS "test-rootfs/",
	},
	.need_spawn = true,
};

static int testsuite_rootfs_stat_access(const struct test *t)
{
	struct stat st;

	if (access("/lib/modules/a", F_OK) < 0) {
		ERR("access failed: %m\n");
		return EXIT_FAILURE;
	}

	if (stat("/lib/modules/a", &st) < 0) {
		ERR("stat failed: %m\n");
		return EXIT_FAILURE;
	}

	return EXIT_SUCCESS;
}
static const struct test stestsuite_rootfs_stat_access = {
	.name = "testsuite_rootfs_stat_access",
	.description = "test if rootfs works - stat() and access()",
	.func = testsuite_rootfs_stat_access,
	.config = {
		[TC_ROOTFS] = TESTSUITE_ROOTFS "test-rootfs/",
	},
	.need_spawn = true,
};

static int testsuite_rootfs_opendir(const struct test *t)
{
	DIR *d;

	d = opendir("/testdir");
	if (d == NULL) {
		ERR("opendir failed: %m\n");
		return EXIT_FAILURE;
	}

	closedir(d);
	return EXIT_SUCCESS;
}
static const struct test stestsuite_rootfs_opendir = {
	.name = "testsuite_rootfs_opendir",
	.description = "test if rootfs works - opendir()",
	.func = testsuite_rootfs_opendir,
	.config = {
		[TC_ROOTFS] = TESTSUITE_ROOTFS "test-rootfs/",
	},
	.need_spawn = true,
};

static const struct test *tests[] = {
	&stestsuite_uname,
	&stestsuite_rootfs_fopen,
	&stestsuite_rootfs_open,
	&stestsuite_rootfs_stat_access,
	&stestsuite_rootfs_opendir,
	NULL,
};

int main(int argc, char *argv[])
{
	const struct test *t;
	int arg;
	size_t i;

	arg = test_init(argc, argv, tests);
	if (arg == 0)
		return 0;

	if (arg < argc) {
		t = test_find(tests, argv[arg]);
		if (t == NULL) {
			fprintf(stderr, "could not find test %s\n", argv[arg]);
			exit(EXIT_FAILURE);
		}

		return test_run(t);
	}

	for (i = 0; tests[i] != NULL; i++) {
		if (test_run(tests[i]) != 0)
			exit(EXIT_FAILURE);
	}

	exit(EXIT_SUCCESS);
}
