/*
 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "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 COPYRIGHT HOLDER OR
 * CONTRIBUTORS 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 "los_config.h"
#include "sys/mount.h"

#ifdef LOSCFG_SHELL

#include "los_typedef.h"
#include "shell.h"
#include "sys/stat.h"
#include "stdlib.h"
#include "unistd.h"
#include "fcntl.h"
#include "sys/statfs.h"
#include "stdio.h"
#include "pthread.h"

#include "shcmd.h"
#include "securec.h"
#include "show.h"
#include "los_syscall.h"

#include "los_process_pri.h"
#include <ctype.h>
#include "fs/fs_operation.h"

typedef enum
{
  RM_RECURSIVER,
  RM_FILE,
  RM_DIR,
  CP_FILE,
  CP_COUNT
} wildcard_type;

#define ERROR_OUT_IF(condition, message_function, handler) \
  do \
    { \
      if (condition) \
        { \
          message_function; \
          handler; \
        } \
    } \
  while (0)

static inline void set_err(int errcode, const char *err_message)
{
  set_errno(errcode);
  perror(err_message);
}

int osShellCmdDoChdir(const char *path)
{
  char *fullpath = NULL;
  char *fullpath_bak = NULL;
  int ret;
  char *shell_working_directory = OsShellGetWorkingDirectory();
  if (shell_working_directory == NULL)
    {
      return -1;
    }

  if (path == NULL)
    {
      LOS_TaskLock();
      PRINTK("%s\n", shell_working_directory);
      LOS_TaskUnlock();

      return 0;
    }

  ERROR_OUT_IF(strlen(path) > PATH_MAX, set_err(ENOTDIR, "cd error"), return -1);

  ret = vfs_normalize_path(shell_working_directory, path, &fullpath);
  ERROR_OUT_IF(ret < 0, set_err(-ret, "cd error"), return -1);

  fullpath_bak = fullpath;
  ret = chdir(fullpath);
  if (ret < 0)
    {
      free(fullpath_bak);
      perror("cd");
      return -1;
    }

  /* copy full path to working directory */

  LOS_TaskLock();
  ret = strncpy_s(shell_working_directory, PATH_MAX, fullpath, strlen(fullpath));
  if (ret != EOK)
    {
      free(fullpath_bak);
      LOS_TaskUnlock();
      return -1;
    }
  LOS_TaskUnlock();
  /* release normalize directory path name */

  free(fullpath_bak);

  return 0;
}

int osShellCmdLs(int argc, const char **argv)
{
  char *fullpath = NULL;
  const char *filename = NULL;
  int ret;
  char *shell_working_directory = OsShellGetWorkingDirectory();
  if (shell_working_directory == NULL)
    {
      return -1;
    }

  ERROR_OUT_IF(argc > 1, PRINTK("ls or ls [DIRECTORY]\n"), return -1);

  if (argc == 0)
    {
      ls(shell_working_directory);
      return 0;
    }

  filename = argv[0];
  ret = vfs_normalize_path(shell_working_directory, filename, &fullpath);
  ERROR_OUT_IF(ret < 0, set_err(-ret, "ls error"), return -1);

  ls(fullpath);
  free(fullpath);

  return 0;
}

int osShellCmdCd(int argc, const char **argv)
{
  if (argc == 0)
    {
      (void)osShellCmdDoChdir("/");
      return 0;
    }

  (void)osShellCmdDoChdir(argv[0]);

  return 0;
}

#define CAT_BUF_SIZE  512
#define CAT_TASK_PRIORITY  10
#define CAT_TASK_STACK_SIZE  0x3000
pthread_mutex_t g_mutex_cat = PTHREAD_MUTEX_INITIALIZER;

int osShellCmdDoCatShow(UINTPTR arg)
{
  int ret = 0;
  char buf[CAT_BUF_SIZE];
  size_t size, written, toWrite;
  ssize_t cnt;
  char *fullpath = (char *)arg;
  FILE *ini = NULL;

  (void)pthread_mutex_lock(&g_mutex_cat);
  ini = fopen(fullpath, "r");
  if (ini == NULL)
    {
      ret = -1;
      perror("cat error");
      goto out;
    }

  do
    {
      (void)memset_s(buf, sizeof(buf), 0, CAT_BUF_SIZE);
      size = fread(buf, 1, CAT_BUF_SIZE, ini);
      if ((int)size < 0)
        {
          ret = -1;
          perror("cat error");
          goto out_with_fclose;
        }

      for (toWrite = size, written = 0; toWrite > 0;)
        {
          cnt = write(1, buf + written, toWrite);
          if (cnt == 0)
            {
              /* avoid task-starvation */
              (void)LOS_TaskDelay(1);
              continue;
            }
          else if (cnt < 0)
            {
              perror("cat write error");
              break;
            }

          written += cnt;
          toWrite -= cnt;
        }
    }
  while (size > 0);

out_with_fclose:
  (void)fclose(ini);
out:
  free(fullpath);
  (void)pthread_mutex_unlock(&g_mutex_cat);
  return ret;
}

int osShellCmdCat(int argc, const char **argv)
{
  char *fullpath = NULL;
  int ret;
  unsigned int ca_task;
  struct Vnode *vnode = NULL;
  TSK_INIT_PARAM_S init_param;
  char *shell_working_directory = OsShellGetWorkingDirectory();
  if (shell_working_directory == NULL)
    {
      return -1;
    }

  ERROR_OUT_IF(argc != 1, PRINTK("cat [FILE]\n"), return -1);

  ret = vfs_normalize_path(shell_working_directory, argv[0], &fullpath);
  ERROR_OUT_IF(ret < 0, set_err(-ret, "cat error"), return -1);

  VnodeHold();
  ret = VnodeLookup(fullpath, &vnode, O_RDONLY);
    if (ret != LOS_OK)
      {
        set_errno(-ret);
        perror("cat error");
        VnodeDrop();
        free(fullpath);
        return -1;
      }
    if (vnode->type != VNODE_TYPE_REG)
      {
        set_errno(EINVAL);
        perror("cat error");
        VnodeDrop();
        free(fullpath);
        return -1;
      }
  VnodeDrop();
  (void)memset_s(&init_param, sizeof(init_param), 0, sizeof(TSK_INIT_PARAM_S));
  init_param.pfnTaskEntry = (TSK_ENTRY_FUNC)osShellCmdDoCatShow;
  init_param.usTaskPrio   = CAT_TASK_PRIORITY;
  init_param.auwArgs[0]   = (UINTPTR)fullpath;
  init_param.uwStackSize  = CAT_TASK_STACK_SIZE;
  init_param.pcName       = "shellcmd_cat";
  init_param.uwResved     = LOS_TASK_STATUS_DETACHED | OS_TASK_FLAG_SPECIFIES_PROCESS;
  init_param.processID    = 2; /* 2: kProcess */

  ret = (int)LOS_TaskCreate(&ca_task, &init_param);

  if (ret != LOS_OK)
    {
      free(fullpath);
    }

  return ret;
}

static int nfs_mount_ref(const char *server_ip_and_path, const char *mount_path,
                         unsigned int uid, unsigned int gid) __attribute__((weakref("nfs_mount")));

static unsigned long get_mountflags(const char *options)
{
    unsigned long mountfalgs = 0;
    char *p;
    while ((options != NULL) && (p = strsep((char**)&options, ",")) != NULL) {
        if (strncmp(p, "ro", strlen("ro")) == 0) {
        mountfalgs |= MS_RDONLY;
        } else if (strncmp(p, "rw", strlen("rw")) == 0) {
            mountfalgs &= ~MS_RDONLY;
        } else if (strncmp(p, "nosuid", strlen("nosuid")) == 0) {
            mountfalgs |= MS_NOSUID;
        } else if (strncmp(p, "suid", strlen("suid")) == 0) {
            mountfalgs &= ~MS_NOSUID;
        } else {
            continue;
        }
    }

    return mountfalgs;
}
static inline void print_mount_usage(void)
{
  PRINTK("mount [DEVICE] [PATH] [NAME]\n");
}

int osShellCmdMount(int argc, const char **argv)
{
  int ret;
  char *fullpath = NULL;
  const char *filename = NULL;
  unsigned int gid, uid;
  char *data = NULL;
  char *filessystemtype = NULL;
  unsigned long mountfalgs;
  char *shell_working_directory = OsShellGetWorkingDirectory();
  if (shell_working_directory == NULL)
    {
      return -1;
    }

  ERROR_OUT_IF(argc < 3, print_mount_usage(), return OS_FAIL);

  if (strncmp(argv[0], "-t", 2) == 0 || strncmp(argv[0], "-o", 2) == 0)
    {
      if (argc < 4)
        {
          PRINTK("mount -t/-o [DEVICE] [PATH] [NAME]\n");
          return -1;
        }

      filename = argv[2];
      ret = vfs_normalize_path(shell_working_directory, filename, &fullpath);
      ERROR_OUT_IF(ret < 0, set_err(-ret, "mount error"), return -1);

      if (strncmp(argv[3], "nfs", 3) == 0)
        {
          if (argc <= 6)
            {
              uid = ((argc >= 5) && (argv[4] != NULL)) ? (unsigned int)strtoul(argv[4], (char **)NULL, 0) : 0;
              gid = ((argc == 6) && (argv[5] != NULL)) ? (unsigned int)strtoul(argv[5], (char **)NULL, 0) : 0;

              if (nfs_mount_ref != NULL)
                {
                  ret = nfs_mount_ref(argv[1], fullpath, uid, gid);
                  if (ret != LOS_OK)
                    {
                      PRINTK("mount -t [DEVICE] [PATH] [NAME]\n");
                    }
                }
              else
                {
                  PRINTK("can't find nfs_mount\n");
                }
              free(fullpath);
              return 0;
            }
        }

      filessystemtype = (argc >= 4) ? (char *)argv[3] : NULL; /* 3: fs type */
      mountfalgs = (argc >= 5) ? get_mountflags((const char *)argv[4]) : 0; /* 4: usr option */
      data = (argc >= 6) ? (char *)argv[5] : NULL; /* 5: usr option data */

      if (strcmp(argv[1], "0") == 0)
        {
          ret = mount((const char *)NULL, fullpath, filessystemtype, mountfalgs, data);
        }
      else
        {
          ret = mount(argv[1], fullpath, filessystemtype, mountfalgs, data); /* 3: fs type */
        }
      if (ret != LOS_OK)
        {
          perror("mount error");
        }
      else
        {
          PRINTK("mount ok\n");
        }
    }
  else
    {
      filename = argv[1];
      ret = vfs_normalize_path(shell_working_directory, filename, &fullpath);
      ERROR_OUT_IF(ret < 0, set_err(-ret, "mount error"), return -1);

      if (strncmp(argv[2], "nfs", 3) == 0)
        {
          if (argc <= 5)
            {
              uid = ((argc >= 4) && (argv[3] != NULL)) ? (unsigned int)strtoul(argv[3], (char **)NULL, 0) : 0;
              gid = ((argc == 5) && (argv[4] != NULL)) ? (unsigned int)strtoul(argv[4], (char **)NULL, 0) : 0;

              if (nfs_mount_ref != NULL)
                {
                  ret = nfs_mount_ref(argv[0], fullpath, uid, gid);
                  if (ret != LOS_OK)
                    {
                      PRINTK("mount [DEVICE] [PATH] [NAME]\n");
                    }
                }
              else
                {
                  PRINTK("can't find nfs_mount\n");
                }
              free(fullpath);
              return 0;
            }

          print_mount_usage();
          free(fullpath);
          return 0;
        }

      mountfalgs = (argc >= 4) ? get_mountflags((const char *)argv[3]) : 0;  /* 3: usr option */
      data = (argc >= 5) ? (char *)argv[4] : NULL; /* 4: usr option data */

      if (strcmp(argv[0], "0") == 0)
        {
          ret = mount((const char *)NULL, fullpath, argv[2], mountfalgs, data);
        }
      else
        {
          ret = mount(argv[0], fullpath, argv[2], mountfalgs, data);  /* 2: fs type */
        }
      if (ret != LOS_OK)
        {
          perror("mount error");
        }
      else
        {
          PRINTK("mount ok\n");
        }
    }

  free(fullpath);
  return 0;
}

int osShellCmdUmount(int argc, const char **argv)
{
  int ret;
  const char *filename = NULL;
  char *fullpath = NULL;
  char *target_path = NULL;
  int cmp_num;
  char *work_path = NULL;
  char *shell_working_directory = OsShellGetWorkingDirectory();
  if (shell_working_directory == NULL)
    {
      return -1;
    }
  work_path = shell_working_directory;

  ERROR_OUT_IF(argc == 0, PRINTK("umount [PATH]\n"), return 0);

  filename = argv[0];
  ret = vfs_normalize_path(shell_working_directory, filename, &fullpath);
  ERROR_OUT_IF(ret < 0, set_err(-ret, "umount error"), return -1);

  target_path = fullpath;
  cmp_num = strlen(fullpath);
  ret = strncmp(work_path, target_path, cmp_num);
  if (ret == 0)
    {
      work_path += cmp_num;
      if (*work_path == '/' || *work_path == '\0')
        {
          set_errno(EBUSY);
          perror("umount error");
          free(fullpath);
          return -1;
        }
    }

  ret = umount(fullpath);
  free(fullpath);
  if (ret != LOS_OK)
    {
      perror("umount error");
      return 0;
    }

  PRINTK("umount ok\n");
  return 0;
}

int osShellCmdMkdir(int argc, const char **argv)
{
  int ret;
  char *fullpath = NULL;
  const char *filename = NULL;
  char *shell_working_directory = OsShellGetWorkingDirectory();
  if (shell_working_directory == NULL)
    {
      return -1;
    }

  ERROR_OUT_IF(argc != 1, PRINTK("mkdir [DIRECTORY]\n"), return 0);

  filename = argv[0];
  ret = vfs_normalize_path(shell_working_directory, filename, &fullpath);
  ERROR_OUT_IF(ret < 0, set_err(-ret, "mkdir error"), return -1);

  ret = mkdir(fullpath, S_IRWXU | S_IRWXG | S_IRWXO);
  if (ret == -1)
    {
      perror("mkdir error");
    }
  free(fullpath);
  return 0;
}

int osShellCmdPwd(int argc, const char **argv)
{
  char buf[SHOW_MAX_LEN] = {0};
  DIR *dir = NULL;
  char *shell_working_directory = OsShellGetWorkingDirectory();
  if (shell_working_directory == NULL)
    {
      return -1;
    }

  ERROR_OUT_IF(argc > 0, PRINTK("\nUsage: pwd\n"), return -1);

  dir = opendir(shell_working_directory);
  if (dir == NULL)
    {
      perror("pwd error");
      return -1;
    }

  LOS_TaskLock();
  if (strncpy_s(buf, SHOW_MAX_LEN, shell_working_directory, SHOW_MAX_LEN - 1) != EOK)
    {
      LOS_TaskUnlock();
      PRINTK("pwd error: strncpy_s error!\n");
      (void)closedir(dir);
      return -1;
    }
  LOS_TaskUnlock();

  PRINTK("%s\n", buf);
  (void)closedir(dir);
  return 0;
}

static inline void print_statfs_usage(void)
{
  PRINTK("Usage  :\n");
  PRINTK("    statfs <path>\n");
  PRINTK("    path  : Mounted file system path that requires query information\n");
  PRINTK("Example:\n");
  PRINTK("    statfs /ramfs\n");
}

int osShellCmdStatfs(int argc, const char **argv)
{
  struct statfs sfs;
  int result;
  unsigned long long total_size, free_size;
  char *fullpath = NULL;
  const char *filename = NULL;
  char *shell_working_directory = OsShellGetWorkingDirectory();
  if (shell_working_directory == NULL)
    {
      return -1;
    }

  ERROR_OUT_IF(argc != 1, PRINTK("statfs failed! Invalid argument!\n"), return -1);

  (void)memset_s(&sfs, sizeof(sfs), 0, sizeof(sfs));

  filename = argv[0];
  result = vfs_normalize_path(shell_working_directory, filename, &fullpath);
  ERROR_OUT_IF(result < 0, set_err(-result, "statfs error"), return -1);

  result = statfs(fullpath, &sfs);
  free(fullpath);

  if (result != 0 || sfs.f_type == 0)
    {
      PRINTK("statfs failed! Invalid argument!\n");
      print_statfs_usage();
      return -1;
    }

  total_size  = (unsigned long long)sfs.f_bsize * sfs.f_blocks;
  free_size   = (unsigned long long)sfs.f_bsize * sfs.f_bfree;

  PRINTK("statfs got:\n f_type     = %d\n cluster_size   = %d\n", sfs.f_type, sfs.f_bsize);
  PRINTK(" total_clusters = %llu\n free_clusters  = %llu\n", sfs.f_blocks, sfs.f_bfree);
  PRINTK(" avail_clusters = %llu\n f_namelen    = %d\n", sfs.f_bavail, sfs.f_namelen);
  PRINTK("\n%s\n total size: %4llu Bytes\n free  size: %4llu Bytes\n", argv[0], total_size, free_size);

  return 0;
}

int osShellCmdTouch(int argc, const char **argv)
{
  int ret;
  int fd = -1;
  char *fullpath = NULL;
  const char *filename = NULL;
  char *shell_working_directory = OsShellGetWorkingDirectory();
  if (shell_working_directory == NULL)
    {
      return -1;
    }

  ERROR_OUT_IF(argc != 1, PRINTK("touch [FILE]\n"), return -1);

  filename = argv[0];
  ret = vfs_normalize_path(shell_working_directory, filename, &fullpath);
  ERROR_OUT_IF(ret < 0, set_err(-ret, "touch error"), return -1);

  fd = open(fullpath, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
  free(fullpath);
  if (fd == -1)
    {
      perror("touch error");
      return -1;
    }

  (void)close(fd);
  return 0;
}

#define CP_BUF_SIZE 4096
pthread_mutex_t g_mutex_cp = PTHREAD_MUTEX_INITIALIZER;

static int os_shell_cmd_do_cp(const char *src_filepath, const char *dst_filename)
{
  int  ret;
  char *src_fullpath = NULL;
  char *dst_fullpath = NULL;
  const char *src_filename = NULL;
  char *dst_filepath = NULL;
  char *buf = NULL;
  const char *filename = NULL;
  ssize_t r_size, w_size;
  int src_fd = -1;
  int dst_fd = -1;
  struct stat stat_buf;
  mode_t src_mode;
  char *shell_working_directory = OsShellGetWorkingDirectory();
  if (shell_working_directory == NULL)
    {
      return -1;
    }

  buf = (char *)malloc(CP_BUF_SIZE);
  if (buf == NULL)
    {
      PRINTK("cp error: Out of memory!\n");
      return -1;
    }

  /* Get source fullpath. */

  ret = vfs_normalize_path(shell_working_directory, src_filepath, &src_fullpath);
  if (ret < 0)
    {
      set_errno(-ret);
      PRINTK("cp error: %s\n", strerror(errno));
      free(buf);
      return -1;
    }

  /* Is source path exist? */

  ret = stat(src_fullpath, &stat_buf);
  if (ret == -1)
    {
      PRINTK("cp %s error: %s\n", src_fullpath, strerror(errno));
      goto errout_with_srcpath;
    }
  src_mode = stat_buf.st_mode;
  /* Is source path a directory? */

  if (S_ISDIR(stat_buf.st_mode))
    {
      PRINTK("cp %s error: Source file can't be a directory.\n", src_fullpath);
      goto errout_with_srcpath;
    }

  /* Get dest fullpath. */

  dst_fullpath = strdup(dst_filename);
  if (dst_fullpath == NULL)
    {
      PRINTK("cp error: Out of memory.\n");
      goto errout_with_srcpath;
    }

  /* Is dest path exist? */

  ret = stat(dst_fullpath, &stat_buf);
  if (ret == 0)
    {
      /* Is dest path a directory? */

      if (S_ISDIR(stat_buf.st_mode))
        {
          /* Get source file name without '/'. */

          src_filename = src_filepath;
          while (1)
            {
              filename = strchr(src_filename, '/');
              if (filename == NULL)
                {
                  break;
                }
              src_filename = filename + 1;
            }

          /* Add the source file after dest path. */

          ret = vfs_normalize_path(dst_fullpath, src_filename, &dst_filepath);
          if (ret < 0)
            {
              set_errno(-ret);
              PRINTK("cp error. %s.\n", strerror(errno));
              goto errout_with_path;
            }
          free(dst_fullpath);
          dst_fullpath = dst_filepath;
        }
    }

  /* Is dest file same as source file? */

  if (strcmp(src_fullpath, dst_fullpath) == 0)
    {
      PRINTK("cp error: '%s' and '%s' are the same file\n", src_fullpath, dst_fullpath);
      goto errout_with_path;
    }

  /* Copy begins. */

  (void)pthread_mutex_lock(&g_mutex_cp);
  src_fd = open(src_fullpath, O_RDONLY);
  if (src_fd < 0)
    {
      PRINTK("cp error: can't open %s. %s.\n", src_fullpath, strerror(errno));
      goto errout_with_mutex;
    }

  dst_fd = open(dst_fullpath, O_CREAT | O_WRONLY | O_TRUNC, src_mode);
  if (dst_fd < 0)
    {
      PRINTK("cp error: can't create %s. %s.\n", dst_fullpath, strerror(errno));
      goto errout_with_srcfd;
    }

  do
    {
      (void)memset_s(buf, CP_BUF_SIZE, 0, CP_BUF_SIZE);
      r_size = read(src_fd, buf, CP_BUF_SIZE);
      if (r_size < 0)
        {
          PRINTK("cp %s %s failed. %s.\n", src_fullpath, dst_fullpath, strerror(errno));
          goto errout_with_fd;
        }
      w_size = write(dst_fd, buf, r_size);
      if (w_size != r_size)
        {
          PRINTK("cp %s %s failed. %s.\n", src_fullpath, dst_fullpath, strerror(errno));
          goto errout_with_fd;
        }
    }
  while (r_size == CP_BUF_SIZE);

  /* Release resource. */

  free(buf);
  free(src_fullpath);
  free(dst_fullpath);
  (void)close(src_fd);
  (void)close(dst_fd);
  (void)pthread_mutex_unlock(&g_mutex_cp);
  return LOS_OK;

errout_with_fd:
  (void)close(dst_fd);
errout_with_srcfd:
  (void)close(src_fd);
errout_with_mutex:
  (void)pthread_mutex_unlock(&g_mutex_cp);
errout_with_path:
  free(dst_fullpath);
errout_with_srcpath:
  free(src_fullpath);
  free(buf);
  return -1;
}

/* The separator and EOF for a directory fullpath: '/'and '\0' */

#define SEPARATOR_EOF_LEN 2

static int os_shell_cmd_do_rmdir(const char *pathname)
{
  struct dirent *dirent = NULL;
  struct stat stat_info;
  DIR *d = NULL;
  char *fullpath = NULL;
  int ret;

  (void)memset_s(&stat_info, sizeof(stat_info), 0, sizeof(struct stat));
  if (stat(pathname, &stat_info) != 0)
    {
      return -1;
    }

  if (S_ISREG(stat_info.st_mode) || S_ISLNK(stat_info.st_mode))
    {
      return remove(pathname);
    }
  d = opendir(pathname);
  if (d == NULL)
    {
      return -1;
    }
  while (1)
    {
      dirent = readdir(d);
      if (dirent == NULL)
        {
          break;
        }
      if (strcmp(dirent->d_name, "..") && strcmp(dirent->d_name, "."))
        {
          size_t fullpath_buf_size = strlen(pathname) + strlen(dirent->d_name) + SEPARATOR_EOF_LEN;
          if (fullpath_buf_size <= 0)
            {
              PRINTK("buffer size is invalid!\n");
              (void)closedir(d);
              return -1;
            }
          fullpath = (char *)malloc(fullpath_buf_size);
          if (fullpath == NULL)
            {
              PRINTK("malloc failure!\n");
              (void)closedir(d);
              return -1;
            }
          ret = snprintf_s(fullpath, fullpath_buf_size, fullpath_buf_size - 1, "%s/%s", pathname, dirent->d_name);
          if (ret < 0)
            {
              PRINTK("name is too long!\n");
              free(fullpath);
              (void)closedir(d);
              return -1;
            }
          (void)os_shell_cmd_do_rmdir(fullpath);
          free(fullpath);
        }
    }
  (void)closedir(d);
  return rmdir(pathname);
}

/*  Wildcard matching operations  */

static int os_wildcard_match(const char *src, const char *filename)
{
  int ret;

  if (*src != '\0')
    {
      if (*filename == '*')
        {
          while ((*filename == '*') || (*filename == '?'))
            {
              filename++;
            }

          if (*filename == '\0')
            {
              return 0;
            }

          while (*src != '\0' && !(*src == *filename))
            {
              src++;
            }

          if (*src == '\0')
            {
              return -1;
            }

          ret = os_wildcard_match(src, filename);

          while ((ret != 0) && (*(++src) != '\0'))
            {
              if (*src == *filename)
                {
                  ret = os_wildcard_match(src, filename);
                }
            }
          return ret;
        }
      else
        {
          if ((*src == *filename) || (*filename == '?'))
            {
              return os_wildcard_match(++src, ++filename);
            }
          return -1;
        }
    }

  while (*filename != '\0')
    {
      if (*filename != '*')
        {
          return -1;
        }
      filename++;
    }
  return 0;
}

/*   To determine whether a wildcard character exists in a path   */

static int os_is_containers_wildcard(const char *filename)
{
  while (*filename != '\0')
    {
      if ((*filename == '*') || (*filename == '?'))
        {
          return 1;
        }
      filename++;
    }
  return 0;
}

/*  Delete a matching file or directory  */

static int os_wildcard_delete_file_or_dir(const char *fullpath, wildcard_type mark)
{
  int ret;

  switch (mark)
    {
      case RM_RECURSIVER:
        ret = os_shell_cmd_do_rmdir(fullpath);
        break;
      case RM_FILE:
        ret = unlink(fullpath);
        break;
      case RM_DIR:
        ret = rmdir(fullpath);
        break;
      default:
        return VFS_ERROR;
    }
  if (ret == -1)
    {
      PRINTK("%s  ", fullpath);
      perror("rm/rmdir error!");
      return ret;
    }

  PRINTK("%s match successful!delete!\n", fullpath);
  return 0;
}

/*  Split the path with wildcard characters  */

static char* os_wildcard_split_path(char *fullpath, char **handle, char **wait)
{
  int n = 0;
  int a = 0;
  int b = 0;
  int len  = strlen(fullpath);

  for (n = 0; n < len; n++)
    {
      if (fullpath[n] == '/')
        {
          if (b != 0)
            {
              fullpath[n] = '\0';
              *wait = fullpath + n + 1;
              break;
            }
          a = n;
        }
      else if (fullpath[n] == '*' || fullpath[n] == '?')
        {
          b = n;
          fullpath[a] = '\0';
          if (a == 0)
            {
              *handle = fullpath + a + 1;
              continue;
            }
          *handle = fullpath + a + 1;
        }
    }
  return fullpath;
}

/*  Handling entry of the path with wildcard characters  */

static int os_wildcard_extract_directory(char *fullpath, void *dst, wildcard_type mark)
{
  char separator[] = "/";
  char src[PATH_MAX] = {0};
  struct dirent *dirent = NULL;
  char *f = NULL;
  char *s = NULL;
  char *t = NULL;
  int ret = 0;
  DIR *d = NULL;
  struct stat stat_buf;
  int deleteFlag = 0;

  f = os_wildcard_split_path(fullpath, &s, &t);

  if (s == NULL)
    {
      if (mark == CP_FILE)
        {
          ret = os_shell_cmd_do_cp(fullpath, dst);
        }
      else if (mark == CP_COUNT)
        {
          ret = stat(fullpath, &stat_buf);
          if (ret == 0 && (S_ISREG(stat_buf.st_mode) || S_ISLNK(stat_buf.st_mode)))
            {
              (*(int *)dst)++;
            }
        }
      else
        {
          ret = os_wildcard_delete_file_or_dir(fullpath, mark);
        }
      return ret;
    }

  d = (*f == '\0') ? opendir("/") : opendir(f);

  if (d == NULL)
    {
      perror("opendir error");
      return VFS_ERROR;
    }

  while (1)
    {
      dirent = readdir(d);
      if (dirent == NULL)
        {
          break;
        }

      ret = strcpy_s(src, PATH_MAX, f);
      if (ret != EOK)
        {
          goto closedir_out;
        }

      ret = os_wildcard_match(dirent->d_name, s);
      if (ret == 0)
        {
          ret = strcat_s(src, sizeof(src), separator);
          if (ret != EOK)
            {
              goto closedir_out;
            }
          ret = strcat_s(src, sizeof(src), dirent->d_name);
          if (ret != EOK)
            {
              goto closedir_out;
            }
          if (t == NULL)
            {
              if (mark == CP_FILE)
                {
                  ret = os_shell_cmd_do_cp(src, dst);
                }
              else if (mark == CP_COUNT)
                {
                  ret = stat(src, &stat_buf);
                  if (ret == 0 && (S_ISREG(stat_buf.st_mode) || S_ISLNK(stat_buf.st_mode)))
                    {
                      (*(int *)dst)++;
                      if ((*(int *)dst) > 1)
                        {
                          break;
                        }
                    }
                }
              else
                {
                  ret = os_wildcard_delete_file_or_dir(src, mark);
                  if (ret == 0)
                    {
                      deleteFlag = 1;
                    }
                }
            }
          else
            {
              ret = strcat_s(src, sizeof(src), separator);
              if (ret != EOK)
                {
                  goto closedir_out;
                }
              ret = strcat_s(src, sizeof(src), t);
              if (ret != EOK)
                {
                  goto closedir_out;
                }
              ret = os_wildcard_extract_directory(src, dst, mark);
              if (mark == CP_COUNT && (*(int *)dst) > 1)
                {
                  break;
                }
            }
        }
    }
  (void)closedir(d);
  if (deleteFlag == 1)
    {
      ret = 0;
    }
  return ret;
closedir_out:
  (void)closedir(d);
  return VFS_ERROR;
}

int osShellCmdCp(int argc, const char **argv)
{
  int  ret;
  const char *src = NULL;
  const char *dst = NULL;
  char *src_fullpath = NULL;
  char *dst_fullpath = NULL;
  struct stat stat_buf;
  int count = 0;
  char *shell_working_directory = OsShellGetWorkingDirectory();
  if (shell_working_directory == NULL)
    {
      return -1;
    }

  ERROR_OUT_IF(argc < 2, PRINTK("cp [SOURCEFILE] [DESTFILE]\n"), return -1);

  src = argv[0];
  dst = argv[1];

  /* Get source fullpath. */

  ret = vfs_normalize_path(shell_working_directory, src, &src_fullpath);
  if (ret < 0)
    {
      set_errno(-ret);
      PRINTK("cp error:%s\n", strerror(errno));
      return -1;
    }

  if (src[strlen(src) - 1] == '/')
    {
      PRINTK("cp %s error: Source file can't be a directory.\n", src);
      goto errout_with_srcpath;
    }

  /* Get dest fullpath. */

  ret = vfs_normalize_path(shell_working_directory, dst, &dst_fullpath);
  if (ret < 0)
    {
      set_errno(-ret);
      PRINTK("cp error: can't open %s. %s\n", dst, strerror(errno));
      goto errout_with_srcpath;
    }

  /* Is dest path exist? */

  ret = stat(dst_fullpath, &stat_buf);
  if (ret < 0)
    {
      /* Is dest path a directory? */

      if (dst[strlen(dst) - 1] == '/')
        {
          PRINTK("cp error: %s, %s.\n", dst_fullpath, strerror(errno));
          goto errout_with_path;
        }
    }
  else
    {
      if ((S_ISREG(stat_buf.st_mode) || S_ISLNK(stat_buf.st_mode)) && dst[strlen(dst) - 1] == '/')
        {
          PRINTK("cp error: %s is not a directory.\n", dst_fullpath);
          goto errout_with_path;
        }
    }

   if (os_is_containers_wildcard(src_fullpath))
    {
      if (ret < 0 || S_ISREG(stat_buf.st_mode) || S_ISLNK(stat_buf.st_mode))
        {
          char *src_copy = strdup(src_fullpath);
          if (src_copy == NULL)
            {
              PRINTK("cp error : Out of memory.\n");
              goto errout_with_path;
            }
          (void)os_wildcard_extract_directory(src_copy, &count, CP_COUNT);
          free(src_copy);
          if (count > 1)
            {
              PRINTK("cp error : %s is not a directory.\n", dst_fullpath);
              goto errout_with_path;
            }
        }
      ret = os_wildcard_extract_directory(src_fullpath, dst_fullpath, CP_FILE);
    }
  else
    {
      ret = os_shell_cmd_do_cp(src_fullpath, dst_fullpath);
    }
  free(dst_fullpath);
  free(src_fullpath);
  return ret;

errout_with_path:
  free(dst_fullpath);
errout_with_srcpath:
  free(src_fullpath);
  return VFS_ERROR;
}

static inline void print_rm_usage(void)
{
  PRINTK("rm [FILE] or rm [-r/-R] [FILE]\n");
}

int osShellCmdRm(int argc, const char **argv)
{
  int  ret = 0;
  char *fullpath = NULL;
  const char *filename = NULL;
  char *shell_working_directory = OsShellGetWorkingDirectory();
  if (shell_working_directory == NULL)
    {
      return -1;
    }

  ERROR_OUT_IF(argc != 1 && argc != 2, print_rm_usage(), return -1);

  if (argc == 2)
    {
      ERROR_OUT_IF(strcmp(argv[0], "-r") != 0 && strcmp(argv[0], "-R") != 0, print_rm_usage(), return -1);

      filename = argv[1];
      ret = vfs_normalize_path(shell_working_directory, filename, &fullpath);
      ERROR_OUT_IF(ret < 0, set_err(-ret, "rm error"), return -1);

      if (os_is_containers_wildcard(fullpath))
        {
          ret = os_wildcard_extract_directory(fullpath, NULL, RM_RECURSIVER);
        }
      else
        {
          ret = os_shell_cmd_do_rmdir(fullpath);
        }
    }
  else
    {
      filename = argv[0];
      ret = vfs_normalize_path(shell_working_directory, filename, &fullpath);
      ERROR_OUT_IF(ret < 0, set_err(-ret, "rm error"), return -1);

      if (os_is_containers_wildcard(fullpath))
        {
          ret = os_wildcard_extract_directory(fullpath, NULL, RM_FILE);
        }
      else
        {
          ret = unlink(fullpath);
        }
    }
  if (ret == -1)
    {
      perror("rm error");
    }
  free(fullpath);
  return 0;
}

int osShellCmdRmdir(int argc, const char **argv)
{
  int  ret;
  char *fullpath = NULL;
  const char *filename = NULL;
  char *shell_working_directory = OsShellGetWorkingDirectory();
  if (shell_working_directory == NULL)
    {
      return -1;
    }

  ERROR_OUT_IF(argc == 0, PRINTK("rmdir [DIRECTORY]\n"), return -1);

  filename = argv[0];
  ret = vfs_normalize_path(shell_working_directory, filename, &fullpath);
  ERROR_OUT_IF(ret < 0, set_err(-ret, "rmdir error"), return -1);

  if (os_is_containers_wildcard(fullpath))
    {
      ret = os_wildcard_extract_directory(fullpath, NULL, RM_DIR);
    }
  else
    {
      ret = rmdir(fullpath);
    }
  if (ret == -1)
    {
      PRINTK("rmdir %s failed. Error: %s.\n", fullpath, strerror(errno));
    }
  free(fullpath);

  return 0;
}

int osShellCmdSync(int argc, const char **argv)
{
  ERROR_OUT_IF(argc > 0, PRINTK("\nUsage: sync\n"), return -1);

  sync();
  return 0;
}

int osShellCmdLsfd(int argc, const char **argv)
{
  ERROR_OUT_IF(argc > 0, PRINTK("\nUsage: lsfd\n"), return -1);

  lsfd();

  return 0;
}

int checkNum(const char *arg)
{
  int i = 0;
  if (arg == NULL)
    {
      return -1;
    }
  if (arg[0] == '-')
    {
      /* exclude the '-' */

      i = 1;
    }
  for (; arg[i] != 0; i++)
    {
      if (!isdigit(arg[i]))
        {
          return -1;
        }
    }
  return 0;
}

#ifdef LOSCFG_KERNEL_SYSCALL
int osShellCmdSu(int argc, const char **argv)
{
  int su_uid;
  int su_gid;

  if (argc == 0)
    {
      /* for su root */

      su_uid = 0;
      su_gid = 0;
    }
  else
    {
      ERROR_OUT_IF((argc != 2), PRINTK("su [uid_num] [gid_num]\n"), return -1);
      ERROR_OUT_IF((checkNum(argv[0]) != 0) || (checkNum(argv[1]) != 0), /* check argv is digit */
      PRINTK("check uid_num and gid_num is digit\n"), return -1);

      su_uid = atoi(argv[0]);
      su_gid = atoi(argv[1]);

      ERROR_OUT_IF((su_uid < 0) || (su_uid > 60000) || (su_gid < 0) ||
         (su_gid > 60000), PRINTK("uid_num or gid_num out of range!they should be [0~60000]\n"), return -1);
    }

  SysSetUserID(su_uid);
  SysSetGroupID(su_gid);
  return 0;
}
#endif

int osShellCmdChmod(int argc, const char **argv)
{
  int i = 0;
  int mode = 0;
  int ret;
  char *fullpath = NULL;
  const char *filename = NULL;
  struct IATTR attr = {0};
  char *shell_working_directory = NULL;
  const char *p = NULL;
#define MODE_BIT 3 /* 3 bits express 1 mode */

  ERROR_OUT_IF((argc != 2), PRINTK("Usage: chmod <MODE> [FILE]\n"), return -1);

  p = argv[0];
  while (p[i])
    {
      if ((p[i] <= '7') && (p[i] >= '0'))
        {
          mode = ((uint)mode << MODE_BIT) | (uint)(p[i] - '0');
        }
      else
        {
          PRINTK("check the input <MODE>\n");
          return -1;
        }
      i++;
    }
  filename = argv[1];

  shell_working_directory = OsShellGetWorkingDirectory();
  if (shell_working_directory == NULL)
    {
      return -1;
    }
  ret = vfs_normalize_path(shell_working_directory, filename, &fullpath);
  ERROR_OUT_IF(ret < 0, set_err(-ret, "chmod error\n"), return -1);

  attr.attr_chg_mode = mode;
  attr.attr_chg_valid = CHG_MODE; /* change mode */
  ret = chattr(fullpath, &attr);
  if (ret < 0)
    {
      free(fullpath);
      PRINTK("chmod error! %s\n", strerror(errno));
      return ret;
    }

  free(fullpath);
  return 0;
}

int osShellCmdChown(int argc, const char **argv)
{
  int ret;
  char *fullpath = NULL;
  const char *filename = NULL;
  struct IATTR attr;
  uid_t owner = -1;
  gid_t group = -1;
  attr.attr_chg_valid = 0;

  ERROR_OUT_IF(((argc != 2) && (argc != 3)), PRINTK("Usage: chown [OWNER] [GROUP] FILE\n"), return -1);
  if (argc == 2)
    {
      ERROR_OUT_IF((checkNum(argv[0]) != 0), PRINTK("check OWNER is digit\n"), return -1);
      owner = atoi(argv[0]);
      filename = argv[1];
    }
  if (argc == 3)
    {
      ERROR_OUT_IF((checkNum(argv[0]) != 0), PRINTK("check OWNER is digit\n"), return -1);
      ERROR_OUT_IF((checkNum(argv[1]) != 0), PRINTK("check GROUP is digit\n"), return -1);
      owner = atoi(argv[0]);
      group = atoi(argv[1]);
      filename = argv[2];
    }

  if (group != -1)
    {
      attr.attr_chg_gid = group;
      attr.attr_chg_valid |= CHG_GID;
    }
  if (owner != -1)
    {
      attr.attr_chg_uid = owner;
      attr.attr_chg_valid |= CHG_UID;
    }

  char *shell_working_directory = OsShellGetWorkingDirectory();
  if (shell_working_directory == NULL)
    {
      return -1;
    }
  ret = vfs_normalize_path(shell_working_directory, filename, &fullpath);
  ERROR_OUT_IF(ret < 0, set_err(-ret, "chown error\n"), return -1);

  ret = chattr(fullpath, &attr);
  if (ret < 0)
    {
      free(fullpath);
      PRINTK("chown error! %s\n", strerror(errno));
      return ret;
   }

  free(fullpath);
  return 0;
}

int osShellCmdChgrp(int argc, const char **argv)
{
  int ret;
  char *fullpath = NULL;
  const char *filename = NULL;
  struct IATTR attr;
  gid_t group;
  attr.attr_chg_valid = 0;
  ERROR_OUT_IF((argc != 2), PRINTK("Usage: chgrp GROUP FILE\n"), return -1);
  ERROR_OUT_IF((checkNum(argv[0]) != 0), PRINTK("check GROUP is digit\n"), return -1);
  group = atoi(argv[0]);
  filename = argv[1];

  if (group != -1) {
    attr.attr_chg_gid = group;
    attr.attr_chg_valid |= CHG_GID;
  }

  char *shell_working_directory = OsShellGetWorkingDirectory();
  if (shell_working_directory == NULL) {
    return -1;
  }
  ret = vfs_normalize_path(shell_working_directory, filename, &fullpath);
  ERROR_OUT_IF(ret < 0, set_err(-ret, "chmod error"), return -1);

  ret = chattr(fullpath, &attr);
  if (ret < 0) {
    free(fullpath);
    PRINTK("chgrp error! %s\n", strerror(errno));
    return ret;
  }

  free(fullpath);
  return 0;
}

#ifdef LOSCFG_SHELL_CMD_DEBUG
SHELLCMD_ENTRY(lsfd_shellcmd, CMD_TYPE_EX, "lsfd", XARGS, (CmdCallBackFunc)osShellCmdLsfd);
SHELLCMD_ENTRY(statfs_shellcmd, CMD_TYPE_EX, "statfs", XARGS, (CmdCallBackFunc)osShellCmdStatfs);
SHELLCMD_ENTRY(touch_shellcmd, CMD_TYPE_EX, "touch", XARGS, (CmdCallBackFunc)osShellCmdTouch);
#ifdef LOSCFG_KERNEL_SYSCALL
SHELLCMD_ENTRY(su_shellcmd, CMD_TYPE_EX, "su", XARGS, (CmdCallBackFunc)osShellCmdSu);
#endif
#endif
SHELLCMD_ENTRY(sync_shellcmd, CMD_TYPE_EX, "sync", XARGS, (CmdCallBackFunc)osShellCmdSync);
SHELLCMD_ENTRY(ls_shellcmd, CMD_TYPE_EX, "ls", XARGS, (CmdCallBackFunc)osShellCmdLs);
SHELLCMD_ENTRY(pwd_shellcmd, CMD_TYPE_EX, "pwd", XARGS, (CmdCallBackFunc)osShellCmdPwd);
SHELLCMD_ENTRY(cd_shellcmd, CMD_TYPE_EX, "cd", XARGS, (CmdCallBackFunc)osShellCmdCd);
SHELLCMD_ENTRY(cat_shellcmd, CMD_TYPE_EX, "cat", XARGS, (CmdCallBackFunc)osShellCmdCat);
SHELLCMD_ENTRY(rm_shellcmd, CMD_TYPE_EX, "rm", XARGS, (CmdCallBackFunc)osShellCmdRm);
SHELLCMD_ENTRY(rmdir_shellcmd, CMD_TYPE_EX, "rmdir", XARGS, (CmdCallBackFunc)osShellCmdRmdir);
SHELLCMD_ENTRY(mkdir_shellcmd, CMD_TYPE_EX, "mkdir", XARGS, (CmdCallBackFunc)osShellCmdMkdir);
SHELLCMD_ENTRY(chmod_shellcmd, CMD_TYPE_EX, "chmod", XARGS, (CmdCallBackFunc)osShellCmdChmod);
SHELLCMD_ENTRY(chown_shellcmd, CMD_TYPE_EX, "chown", XARGS, (CmdCallBackFunc)osShellCmdChown);
SHELLCMD_ENTRY(chgrp_shellcmd, CMD_TYPE_EX, "chgrp", XARGS, (CmdCallBackFunc)osShellCmdChgrp);
SHELLCMD_ENTRY(mount_shellcmd, CMD_TYPE_EX, "mount", XARGS, (CmdCallBackFunc)osShellCmdMount);
SHELLCMD_ENTRY(umount_shellcmd, CMD_TYPE_EX, "umount", XARGS, (CmdCallBackFunc)osShellCmdUmount);
SHELLCMD_ENTRY(cp_shellcmd, CMD_TYPE_EX, "cp", XARGS, (CmdCallBackFunc)osShellCmdCp);
#endif
