红宝石在后台执行shell命令用正确的参数逃逸 [英] Executing shell command in background from ruby with proper argument escaping

问题描述

我要在后台运行命令，但我希望能有适当的转义为它的参数。

I have to run a command in the background but I want to have proper escaping for its parameter.

system("rake send_mails subject='#{params[:subject]}' 2> /dev/null 1> /dev/null &");

如果我写的系统（耙，send_mails，则params [：主题]）然后我没有到位的重定向和＆安培; 标志。如果我没有，我没有逃避的主题参数。

If I write system("rake", "send_mails", params[:subject]) then I don't have "place" for redirections and the & sign. If I don't I do not have escaping for the subject parameter.

我怎样才能解决这个问题？

How can I resolve this?

推荐答案

在Ruby 1.9中，尝试 Process.spawn ：

In Ruby 1.9, try Process.spawn:

# Spawn a new process and run the rake command
pid = Process.spawn({"subject" => params[:subject]},
                    "rake", "send_mails",
                    :out => 'dev/null', :err => 'dev/null')

# Detach the spawned process
Process.detach pid

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