Re: CocoaEcho
Re: CocoaEcho
- Subject: Re: CocoaEcho
- From: Jens Alfke <email@hidden>
- Date: Mon, 14 Jun 2010 13:15:11 -0700
On Jun 14, 2010, at 12:09 PM, Nick Zitzmann wrote:
> Use launchd's launch daemons feature.
There’s an Apple tech note on daemons and agents — required reading if you want to get into this. Search for it in the Xcode doc viewer.
The difference between the two is that a daemon is per-machine while an agent is per-user. A daemon starts at boot time and persists across user logins (or when no user is logged in); an agent starts when a user logs in and quits when the user logs out (and there can be multiple agents running at once if several users are logged in.)
Agents are safer because they run as a normal user. Daemons often run as root, so a security bug in a networked daemon could cause the whole machine to get pwned. One workaround is to create a new user account just to run your daemon and configure its launchd plist to run as that user. Many of the system daemons like Apache do that.
—Jens_______________________________________________
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| References: | |
| | >CocoaEcho (From: "B. Mitchell Loebel" <email@hidden>) |
| | >Re: CocoaEcho (From: Nick Zitzmann <email@hidden>) |