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/*

 * Copyright (c) 2008 Jakub Jermar

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * - Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 * - Redistributions in binary form must reproduce the above copyright

 *   notice, this list of conditions and the following disclaimer in the

 *   documentation and/or other materials provided with the distribution.

 * - The name of the author may not be used to endorse or promote products

 *   derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include <errno.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <vfs/vfs.h>

#include <unistd.h>

#include <fcntl.h>

#include <dirent.h>

#include <devmap.h>

#include <sys/types.h>

#include <sys/stat.h>

#include "../tester.h"

#define FS_TYPE      "tmpfs"

#define MOUNT_POINT  "/tmp"

#define OPTIONS      ""

#define FLAGS        0

#define TEST_DIRECTORY  MOUNT_POINT "/testdir"

#define TEST_FILE       TEST_DIRECTORY "/testfile"

#define TEST_FILE2      TEST_DIRECTORY "/nextfile"

#define MAX_DEVICE_NAME  32

#define BUF_SIZE         16

static char text[] = "Lorem ipsum dolor sit amet, consectetur adipisicing elit";

static char *read_root(void)

{

    TPRINTF("Opening the root directory...");

    DIR *dirp = opendir("/");

    if (!dirp) {

        TPRINTF("\n");

        return "opendir() failed";

    } else

        TPRINTF("OK\n");

    struct dirent *dp;

    while ((dp = readdir(dirp)))

        TPRINTF(" node \"%s\"\n", dp->d_name);

    closedir(dirp);

    return NULL;

}

char *test_vfs1(void)

{

    if (mkdir(MOUNT_POINT, 0) != 0)

        return "mkdir() failed";

    TPRINTF("Created directory %s\n", MOUNT_POINT);

    char null[MAX_DEVICE_NAME];

    int null_id = devmap_null_create();

    if (null_id == -1)

        return "Unable to create null device";

    snprintf(null, MAX_DEVICE_NAME, "null%d", null_id);

    int rc = mount(FS_TYPE, MOUNT_POINT, null, OPTIONS, FLAGS);

    switch (rc) {

    case EOK:

        TPRINTF("Mounted /dev/%s as %s on %s\n", null, FS_TYPE, MOUNT_POINT);

        break;

    case EBUSY:

        TPRINTF("(INFO) Filesystem already mounted on %s\n", MOUNT_POINT);

        break;

    default:

        TPRINTF("(ERR) IPC returned errno %d (is tmpfs loaded?)\n", rc);

        return "mount() failed";

    }

    if (mkdir(TEST_DIRECTORY, 0) != 0)

        return "mkdir() failed";

    TPRINTF("Created directory %s\n", TEST_DIRECTORY);

    int fd0 = open(TEST_FILE, O_CREAT);

    if (fd0 < 0)

        return "open() failed";

    TPRINTF("Created file %s (fd=%d)\n", TEST_FILE, fd0);

    size_t size = sizeof(text);

    ssize_t cnt = write(fd0, text, size);

    if (cnt < 0)

        return "write() failed";

    TPRINTF("Written %d bytes\n", cnt);

    if (lseek(fd0, 0, SEEK_SET) != 0)

        return "lseek() failed";

    TPRINTF("Sought to position 0\n");

    char buf[BUF_SIZE];

    while ((cnt = read(fd0, buf, BUF_SIZE))) {

        if (cnt < 0)

            return "read() failed";

        TPRINTF("Read %d bytes: \".*s\"\n", cnt, cnt, buf);

    }

    close(fd0);

    char *rv = read_root();

    if (rv != NULL)

        return rv;

    if (rename(TEST_FILE, TEST_FILE2))

        return "rename() failed";

    TPRINTF("Renamed %s to %s\n", TEST_FILE, TEST_FILE2);

    if (unlink(TEST_FILE2))

        return "unlink() failed";

    TPRINTF("Unlinked %s\n", TEST_FILE2);

    if (rmdir(TEST_DIRECTORY))

        return "rmdir() failed";

    TPRINTF("Removed directory %s\n", TEST_DIRECTORY);

    rv = read_root();

    if (rv != NULL)

        return rv;

    return NULL;

}