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libuv/src/win/util.c  view on Meta::CPAN

  return 0;
}


int uv__getpwuid_r(uv_passwd_t* pwd) {
  HANDLE token;
  wchar_t username[UNLEN + 1];
  wchar_t path[MAX_PATH];
  DWORD bufsize;
  int r;

  if (pwd == NULL)
    return UV_EINVAL;

  /* Get the home directory using GetUserProfileDirectoryW() */
  if (OpenProcessToken(GetCurrentProcess(), TOKEN_READ, &token) == 0)
    return uv_translate_sys_error(GetLastError());

  bufsize = ARRAY_SIZE(path);
  if (!GetUserProfileDirectoryW(token, path, &bufsize)) {
    r = GetLastError();
    CloseHandle(token);

    /* This should not be possible */
    if (r == ERROR_INSUFFICIENT_BUFFER)
      return UV_ENOMEM;

    return uv_translate_sys_error(r);
  }

  CloseHandle(token);

  /* Get the username using GetUserNameW() */
  bufsize = ARRAY_SIZE(username);
  if (!GetUserNameW(username, &bufsize)) {
    r = GetLastError();

    /* This should not be possible */
    if (r == ERROR_INSUFFICIENT_BUFFER)
      return UV_ENOMEM;

    return uv_translate_sys_error(r);
  }

  pwd->homedir = NULL;
  r = uv__convert_utf16_to_utf8(path, -1, &pwd->homedir);

  if (r != 0)
    return r;

  pwd->username = NULL;
  r = uv__convert_utf16_to_utf8(username, -1, &pwd->username);

  if (r != 0) {
    uv__free(pwd->homedir);
    return r;
  }

  pwd->shell = NULL;
  pwd->uid = -1;
  pwd->gid = -1;

  return 0;
}


int uv_os_get_passwd(uv_passwd_t* pwd) {
  return uv__getpwuid_r(pwd);
}


int uv_os_getenv(const char* name, char* buffer, size_t* size) {
  wchar_t var[MAX_ENV_VAR_LENGTH];
  wchar_t* name_w;
  DWORD bufsize;
  size_t len;
  int r;

  if (name == NULL || buffer == NULL || size == NULL || *size == 0)
    return UV_EINVAL;

  r = uv__convert_utf8_to_utf16(name, -1, &name_w);

  if (r != 0)
    return r;

  len = GetEnvironmentVariableW(name_w, var, MAX_ENV_VAR_LENGTH);
  uv__free(name_w);
  assert(len < MAX_ENV_VAR_LENGTH); /* len does not include the null */

  if (len == 0) {
    r = GetLastError();

    if (r == ERROR_ENVVAR_NOT_FOUND)
      return UV_ENOENT;

    return uv_translate_sys_error(r);
  }

  /* Check how much space we need */
  bufsize = WideCharToMultiByte(CP_UTF8, 0, var, -1, NULL, 0, NULL, NULL);

  if (bufsize == 0) {
    return uv_translate_sys_error(GetLastError());
  } else if (bufsize > *size) {
    *size = bufsize;
    return UV_ENOBUFS;
  }

  /* Convert to UTF-8 */
  bufsize = WideCharToMultiByte(CP_UTF8,
                                0,
                                var,
                                -1,
                                buffer,
                                *size,
                                NULL,
                                NULL);

  if (bufsize == 0)
    return uv_translate_sys_error(GetLastError());