August 2011
Intermediate to advanced
552 pages
23h 48m
English
Content preview from Advanced Mac OS X Programming: The Big Nerd Ranch GuideBecome 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,
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Directory Permissions
Directories have the same permission bits as files, rwx for user, group, and other, but with slightly different interpretations. You cannot run directories as programs, so the execute bit takes on a different meaning: it acts like a search bit. When opening any type of file by path, the user must have execute permission on every directory mentioned in the path. The execute bit can match the user, group, or other. Read permission is different from the execute/search permission. Read permission lets you read the directory itself, like with the ls command, to obtain a list of all the file names in the directory. Execute just means that you can pass through, or execute programs in that directory. You do not need read permissions ...
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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.