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

  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());

  *size = bufsize - 1;
  return 0;
}


int uv_os_setenv(const char* name, const char* value) {
  wchar_t* name_w;
  wchar_t* value_w;
  int r;

  if (name == NULL || value == NULL)
    return UV_EINVAL;

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

  if (r != 0)
    return r;

  r = uv__convert_utf8_to_utf16(value, -1, &value_w);

  if (r != 0) {
    uv__free(name_w);
    return r;
  }

  r = SetEnvironmentVariableW(name_w, value_w);
  uv__free(name_w);
  uv__free(value_w);

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

  return 0;
}


int uv_os_unsetenv(const char* name) {
  wchar_t* name_w;
  int r;

  if (name == NULL)
    return UV_EINVAL;

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

  if (r != 0)
    return r;

  r = SetEnvironmentVariableW(name_w, NULL);
  uv__free(name_w);

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

  return 0;
}


int uv_os_gethostname(char* buffer, size_t* size) {
  char buf[UV_MAXHOSTNAMESIZE];
  size_t len;

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

  uv__once_init(); /* Initialize winsock */

  if (gethostname(buf, sizeof(buf)) != 0)
    return uv_translate_sys_error(WSAGetLastError());

  buf[sizeof(buf) - 1] = '\0'; /* Null terminate, just to be safe. */
  len = strlen(buf);

  if (len >= *size) {
    *size = len + 1;
    return UV_ENOBUFS;
  }

  memcpy(buffer, buf, len + 1);
  *size = len;
  return 0;
}


static int uv__get_handle(uv_pid_t pid, int access, HANDLE* handle) {
  int r;

  if (pid == 0)
    *handle = GetCurrentProcess();
  else
    *handle = OpenProcess(access, FALSE, pid);

  if (*handle == NULL) {
    r = GetLastError();

    if (r == ERROR_INVALID_PARAMETER)
      return UV_ESRCH;