June 2004
Intermediate to advanced
1056 pages
39h 58m
English
Content preview from Mac OS X Panther in a Nutshell, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Daemon Management
Panther relies on the services of a large number of system daemons for its operation, and every network service you enable adds to the count of potential background processes. While it would be easiest to simply have all the daemons launch at startup, it’s much more efficient to do this for just the handful that require it and launch the other daemons only as needed. To coordinate this complex task, Panther uses three mechanisms: bootstrap daemons , StartupItems, and xinetd.
Bootstrap Daemons
Introduced with
Panther,
the register_mach_bootstrap_servers tool,
provides a way to have system daemons launch on demand (that is, not
until they receive their first service request). In fact, this method
will eventually take the place of the StartupItems
(see the following section) as Mac OS X evolves in future
releases.
This tool assembles a list of daemons by reading each file in
/etc/mach_init.d/ (for system daemons to be run
as root) and /etc/mach_init_per_user.d/ (for
user daemons to be run under normal user accounts). It then registers
each daemon in the list and the service it provides with the
mach_init daemon, itself launched by the Mach
kernel early in the startup.
Once a daemon is registered, mach_init waits for
requests from other processes for the services the daemon provides,
launching (or relaunching) the daemon only when it detects a request.
Such daemons, available to the system so early in the startup
process, are known as bootstrap daemons. For now, only ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.