Re: [fink-core] daemonic vs launchd

[AIDA S. <sh...@so...>]

At Thu, 19 Apr 2007 09:16:55 -0700,
David R. Morrison wrote:
> 
> 
> On Apr 19, 2007, at 8:03 AM, David H. wrote:
> 
> > Hello all.
> >
> > Just a question. What is/are the main differences and what should we
> > focus on supporting or converting to?
> 
> This is a good point.  We probably need to be moving away from  
> daemonic in the near future.

Lanuchd cannot replace daemonic. The launchd.plist(5) manpage reads:

> A daemon or agent launched by launchd MUST NOT do the following in
> the process directly launched by launchd:
>
>   o   fork(2) and have the parent process exit(3) or _exit(2).
>   o   Call daemon(3)
>
> A daemon or agent launched by launchd SHOULD NOT do the following as
> a part of their startup initialization:
>
>   o   Setup the user ID or group ID.
>   o   Setup the working directory.
>   o   chroot(2)
>   o   setsid(2)
>   o   Close "stray" file descriptors.
>   o   Change stdio(3) to /dev/null.
>   o   Setup resource limits with setrusage(2).
>   o   Setup priority with setpriority(2).
>   o   Ignore the SIGTERM signal.

In short, launchd is a replacement of inetd rather than rc scripts or
StartupItems or daemonic.