OdysseusYuan/LKY_OfficeTools · error · Exception

执行修改 {serv_name} 描述信息时，返回值为空！

Error message

执行修改 {serv_name} 描述信息时，返回值为空！

What it means

Thrown in Com_ServiceOS.Config.Modify.Description when the stdout from `sc description ...` via Run.Cmd is null or empty (Com_ServiceOS.cs:459-461). Run.Cmd returns null only inside its catch, so this indicates a cmd.exe/redirect infrastructure failure rather than an sc error. Description catches the throw, logs it, and returns false (Com_ServiceOS.cs:479-483).

Source

Thrown at LKY_OfficeTools/Common/Com_ServiceOS.cs:461

                        new Log(Ex.ToString());
                        return false;
                    }
                }

                internal static bool Description(string serv_name, string serv_description)
                {
                    try
                    {
                        if (Query.IsCreated(serv_name))
                        {
                            //已经创建服务，才进行修改
                            string cmd_modify_desc = $"sc description \"{serv_name}\" \"{serv_description}\"";
                            var modify_result = Com_ExeOS.Run.Cmd(cmd_modify_desc);

                            //非空判断，若返回值为空，则为假
                            if (string.IsNullOrEmpty(modify_result))
                            {
                                throw new Exception($"执行修改 {serv_name} 描述信息时，返回值为空！");
                            }

                            //判断是否修改描述成功
                            if (modify_result.Contains("成功") || modify_result.ToLower().Contains("success"))
                            {
                                return true;
                            }
                            else
                            {
                                throw new Exception($"修改服务 {serv_name} 的描述信息为 {serv_description} 失败！");
                            }
                        }
                        else
                        {
                            throw new Exception($"尝试修改服务 {serv_name} 的描述信息为 {serv_description}，但该服务未安装！");
                        }
                    }
                    catch (Exception Ex)

View on GitHub (pinned to 6f9a1bd471)

Solutions

1. Ensure cmd.exe is on PATH and not blocked; run elevated.
2. Run `sc description <name> "..."` directly in a console to confirm sc works.
3. Inspect the bool return and Lib_AppLog for Run.Cmd's caught exception.
4. Resolve the cmd/redirect environment then retry.

Example fix

// before
bool ok = Com_ServiceOS.Config.Modify.Description(name, desc);

// after
if (!Com_ServiceOS.Query.IsCreated(name)) { return false; }
bool ok = Com_ServiceOS.Config.Modify.Description(name, desc);

if (!Com_ServiceOS.Query.IsCreated(name)) { return false; }
bool ok = Com_ServiceOS.Config.Modify.Description(name, desc);

static bool ServiceRegistered(string name) => Com_ServiceOS.Query.IsCreated(name);

When it happens

Trigger: Run.Cmd throws: cmd.exe cannot start, output redirection fails, or the process is killed before producing stdout.

Common situations: cmd.exe blocked by policy on a hardened host; stdio handle exhaustion; antivirus hooking redirected console IO.

Related errors

• 执行修改 {serv_name} binPath 参数时，返回值为空！
• 执行修改 {serv_name} DisplayName 参数时，返回值为空！
• 创建服务 {serv_name} 时，返回值为空！
• 删除服务 {serv_name} 时，返回值为空！
• 修改服务 {serv_name} 的 binPath 信息为 {serv_binpath} 失败！

AI-assisted analysis of OdysseusYuan/LKY_OfficeTools@6f9a1bd471 (2026-08-13). Data as JSON: /api/errors/f03e43c16ad6f5c0. Report an issue: GitHub.