January 2004
Intermediate to advanced
432 pages
11h 1m
English
Content preview from HP-UX 11i Internals
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The Birth of a Process
The UNIX operating environment presents a special challenge when it comes to starting a new process. The only way for a new process to be created is for an existing process to ask the system to make a copy, a complete “clone” of the process environment (see Figure 9-1). A parent process is said to fork a “child” process: this is the computer equivalent of cellular mitosis in living organisms.
Figure 9-1. Parent Creates a Child
Once the fork is completed, there are two essentially identical process environments under kernel control. They have the same process logical memory view, identical file descriptors (to facilitate ...
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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.