Warning-exit code 1-indicates a service is in warning state.
WARNING—退出代码1—表示服务处于警告状态。
Unknown-exit code 3-indicates a service is in unknown state.
UNKNOWN—退出代码3—表示服务处于未知状态。
The other just returns silently; no error message, no unusual exit code.
而另一种实现只是无声地返回，没有错误消息，也没有不寻常的退出代码。
Channel requests relay information such as the exit code of a server-side process.
通道请求转送信息，比如服务器端流程的退出代码。
Block until a container stops, then print its exit code.
阻塞运行直到容器停止，然后打印出它的退出代码。
Specifies the exit code that is provided by the executed command.
指定由执行的命令提供的退出代码。
The function returns an integer, which represents the exit code for the child process.
这个函数返回一个整数，代表子进程的退出码。
The function returns an integer, which represents the exit code for the child process.
这个函数返回一个整数，代表子进程的退出码。
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