问题：
I'd like a daemonizer that can turn an arbitrary, generic script or command into a daemon .我想要一个可以将任意的通用脚本或命令转换为daemon 的守护程序。
There are two common cases I'd like to deal with:我想处理两种常见情况：
I have a script that should run forever.我有一个应该永远运行的脚本。 If it ever dies (or on reboot), restart it.如果它死了（或在重新启动时），请重新启动它。 Don't let there ever be two copies running at once (detect if a copy is already running and don't launch it in that case).不要让两个副本同时运行（检测一个副本是否已经在运行，在这种情况下不要启动它）。
I have a simple script or command line command that I'd like to keep executing repeatedly forever (with a short pause between runs).我有一个简单的脚本或命令行命令，我想永远重复执行（在运行之间有短暂的停顿）。 Again, don't allow two copies of the script to ever be running at once.同样，不要让脚本的两个副本同时运行。
Of course it's trivial to write a "while(true)" loop around the script in case 2 and then apply a solution for case 1, but a more general solution will just solve case 2 directly since that applies to the script in case 1 as well (you may just want a shorter or no pause if the script is not intended to ever die (of course if the script really does never die then the pause doesn't actually matter)).当然，在案例 2 中围绕脚本编写一个“while(true)”循环，然后为案例 1 应用解决方案是微不足道的，但更通用的解决方案将直接解决案例 2，因为这适用于案例 1 中的脚本好（你可能只是想更短或没有停顿如果脚本不打算会死（当然如果脚本确实从来没有再死暂停实际上并没有物质））。
Note that the solution should not involve, say, adding file-locking code or PID recording to the existing scripts.请注意，该解决方案不应涉及，例如，向现有脚本添加文件锁定代码或 PID 记录。
More specifically, I'd like a program "daemonize" that I can run like更具体地说，我想要一个程序“守护进程”，我可以像
% daemonize myscript arg1 arg2
or, for example,或者，例如，
% daemonize 'echo `date` >> /tmp/times.txt'
which would keep a growing list of dates appended to times.txt.这将保留一个不断增长的日期列表附加到 times.txt。 (Note that if the argument(s) to daemonize is a script that runs forever as in case 1 above, then daemonize will still do the right thing, restarting it when necessary.) I could then put a command like above in my .login and/or cron it hourly or minutely (depending on how worried I was about it dying unexpectedly). （请注意，如果 daemonize 的参数是一个永远运行的脚本，如上面的情况 1，那么 daemonize 仍然会做正确的事情，在必要时重新启动它。）然后我可以在我的 .login 中放置一个类似上面的命令和/或每小时或每分钟一次（取决于我对它意外死亡的担心程度）。
NB: The daemonize script will need to remember the command string it is daemonizing so that if the same command string is daemonized again it does not launch a second copy.注意：daemonize 脚本需要记住它正在守护的命令字符串，以便如果再次守护相同的命令字符串，它不会启动第二个副本。
Also, the solution should ideally work on both OS X and linux but solutions for one or the other are welcome.此外，理想情况下，该解决方案应该适用于 OS X 和 Linux，但欢迎使用其中之一的解决方案。
EDIT: It's fine if you have to invoke it with sudo daemonize myscript myargs .编辑：如果您必须使用sudo daemonize myscript myargs调用它， sudo daemonize myscript myargs 。
(If I'm thinking of this all wrong or there are quick-and-dirty partial solutions, I'd love to hear that too.) （如果我认为这一切都错了，或者有快速而肮脏的部分解决方案，我也很想听听。）
PS: In case it's useful, here's a similar question specific to python. PS：如果它有用， 这里有一个特定于python的类似问题。
And this answer to a similar question has what appears to be a useful idiom for a quick-and-dirty demonizing of an arbitrary script: 这个对类似问题的回答似乎是一个有用的成语，用于快速和肮脏地妖魔化任意脚本：