python - 从 python 启动 gnu screen ？

Question

我尝试从子进程调用中使用 gnu screen 执行服务器守护进程，但它甚至没有启动

subprocess.call(["screen", "-dmS test ./server"])

有人告诉我运行 screen 需要终端，因此我不能简单地通过调用来执行它。你能告诉我一些代码来做到这一点吗？

Answer 1

尝试

subprocess.call( ["screen", "-d", "-m", "-S", "test", "./server"] )

您需要将参数字符串分成单独的参数，每个字符串一个。

这是subprocess 文档中的相关引用:

On UNIX, with shell=False (default): In this case, the Popen class uses os.execvp() to execute the child program. args should normally be a sequence. A string will be treated as a sequence with the string as the only item (the program to execute).

On UNIX, with shell=True: If args is a string, it specifies the command string to execute through the shell. If args is a sequence, the first item specifies the command string, and any additional items will be treated as additional shell arguments.

因此，默认情况下，参数将完全按照您提供的方式使用；它不会尝试将字符串解析为多个参数。如果您将 shell 设置为 true，您可以尝试以下操作:

subprocess.call("screen -dmS test ./server", shell=True)

并且字符串会像命令行一样被解析。