需要Apple launch.h api的文档

Question

我通过终端加载了服务 launchctl load /System/Library/LaunchAgent/com.example.my.plist

现在，我需要以编程方式检测服务是否正在运行并启动该服务。 http://www.opensource.apple.com/source/launchd/launchd-328/launchd/src/launch.h 以上是Apple提供的launch.h api链接，有助于实现这一目标。

任何人都可以帮我提供文档吗？ 或者，帮助我如何使用api检查服务的状态并启动它。

感谢。

Answer 1

此API的大部分现已弃用（macOS 10.14 SDK）：

/*!
 * @header
 * These interfaces were only ever documented for the purpose of allowing a
 * launchd job to obtain file descriptors associated with the sockets it
 * advertised in its launchd.plist(5). That functionality is now available in a
 * much more straightforward fashion through the {@link launch_activate_socket}
 * API.
 *
 * There are currently no replacements for other uses of the {@link launch_msg}
 * API, including submitting, removing, starting, stopping and listing jobs.
 */

该解决方案似乎使用了launchctl（man launchctl或此处的在线内容：https://ss64.com/osx/launchctl.html）。像launchctl list | grep <agent label>之类的东西。