HarmonyOS c++代码调用popen，提示popen error:Permission denied

代码如下：

std::string get_local_route_table(){
  const char* cmd = "ip route list table all";
  xinfo2(TSF"popen cmd=%_", cmd);

  std::string result;
  FILE* pp = popen(cmd, "r");
  if (!pp) {
    xerror2(TSF"popen error:%_", strerror(errno));
    return result;
  }

  char line[1024];
  while (fgets(line, sizeof(line), pp) != NULL) {
    result.append(line, strlen(line));
  }
  pclose(pp);

  return result;
}