使用适当的参数转义从 ruby​​ 在后台执行 shell 命令 [英] Executing shell command in background from ruby with proper argument escaping

问题描述

我必须在后台运行一个命令，但我想对其参数进行适当的转义.

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 system("rake", "send_mails", params[:subject]) 那么我没有重定向的地方"和 & 签到.如果我没有，我没有 subject 参数的转义.

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.

我该如何解决这个问题?

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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