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Leading spaces are common, actuallyLeading spaces are common, actuallyPosted Mar 26, 2009 19:21 UTC (Thu) by njs (guest, #40338)In reply to: Leading spaces are common, actually by barryn Parent article: Wheeler: Fixing Unix/Linux/POSIX Filenames There is a use for leading spaces: They force files to appear earlier than usual in a lexicographic sort. Are you sure? I've seen this in real-world uses too, but I thought that all the common systems were fixed to do human-style (non-ASCIIbetical) sorting a few years ago. I don't have any proprietary systems around to test, but I'll be *really* amused if the OS X Finder is missing this usability feature of GNU ls: ~/t$ touch "a" " b" "c" ~/t$ ls -l total 0 -rw-r--r-- 1 njs njs 0 2009-03-26 12:16 a -rw-r--r-- 1 njs njs 0 2009-03-26 12:16 b -rw-r--r-- 1 njs njs 0 2009-03-26 12:16 c
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Leading spaces are common, actually Posted Mar 26, 2009 21:23 UTC (Thu) by foom (subscriber, #14868) [Link] Finder does not ignore spaces. I'm quite glad, because I use the space-prefix trick rather regularly. I am occasionally annoyed at how GNU ls sorts "A B" between "AA" and "AC" instead of before them: that's certainly not how my brain sorts.Finder does however sort numbers like this, which GNU ls does not: 1 2 10 I don't really see what the point of the "human-style" sorting is if it can't even sort numbers. That seems kind of basic to me.
Leading spaces are common, actually Posted Mar 28, 2009 1:21 UTC (Sat) by nix (subscriber, #2304) [Link]
Sorting numerically in GNU ls is done by 'ls -v'.
(By default, despite comments elsewhere in this thread, ls sorts
Leading spaces are common, actually Posted Mar 28, 2009 1:57 UTC (Sat) by foom (subscriber, #14868) [Link] > Sorting numerically in GNU ls is done by 'ls -v'.Huh, never knew that, interesting! Never would have found that from the man page, which says "-v sort by version". That seems a remarkably poor description of what it actually does. > (By default, despite comments elsewhere in this thread, ls sorts ASCIIbetically, so " 2" comes before "1".) Well, not exactly: GNU ls has a default sort which depends on the locale's collation settings, and most systems default to a locale like en_US.UTF-8, so most people have it sorting in a case/accent-insensitive manner by default on their systems.
Leading spaces are common, actually Posted Mar 28, 2009 20:36 UTC (Sat) by nix (subscriber, #2304) [Link]
It's called 'sort by version' because the function it calls (strverscmp())
was designed to sort version numbers, and because the expected use of ls -v was sorting a directory full of version-named directories in version order.
(And you're right on the collation sort thing: I spoke carelessly.)
Leading spaces are common, actually Posted Mar 27, 2009 4:41 UTC (Fri) by barryn (subscriber, #5996) [Link] Behavior ofls in Mac OS X 10.5.6 build 9G55:
$ pwd /Library/Application Support/GarageBand/Instrument Library/Track Settings $ ls -l Master | head total 0 drwxrwxrwx 3 root admin 102 May 3 2008 Basic drwxrwxrwx 6 root admin 204 May 3 2008 Ambient drwxrwxrwx 6 root admin 204 May 3 2008 Classical drwxrwxrwx 11 root admin 374 May 3 2008 Dance drwxrwxrwx 5 root admin 170 May 3 2008 Hip Hop drwxrwxrwx 5 root admin 170 May 3 2008 Jazz drwxrwxrwx 7 root admin 238 May 3 2008 Pop drwxrwxrwx 7 root admin 238 May 3 2008 Rock drwxrwxrwx 5 root admin 170 May 3 2008 Stadium Rock $And this matches the Finder's behavior. BTW, if the Finder behaved any other way, it would be more difficult to properly recover broken Mac OS 9.x or earlier installations using OS X -- Classic Mac OS loads files in /System Folder/Extensions in lexicographic order, and the load order matters, and the leading space trick is used very frequently there. Mac OS X 10.5 can dual-boot with Mac OS 9.x, so this still matters for some users.
Leading spaces are common, actually Posted Mar 27, 2009 15:45 UTC (Fri) by foom (subscriber, #14868) [Link] >Behavior of ls in Mac OS X 10.5.6 build 9G55Well, OSX's "ls" is actually just doing a traditional strcmp sort, not anything fancy (note that it puts all uppercase characters before all lowercase). But the Finder's sort routine is fancy. They seem to be a sort order based on Unicode TR10.
Leading spaces are common, actually Posted Nov 15, 2009 0:32 UTC (Sun) by yuhong (guest, #57183) [Link]
"Classic Mac OS loads files in /System Folder/Extensions in lexicographic
order, and the load order matters, and the leading space trick is used very frequently there. " Yep, look at what they had to do about this when Apple introduced HFS+ in Mac OS 8.1: http://developer.apple.com/legacy/mac/library/technotes/t... s http://developer.apple.com/legacy/mac/library/technotes/t...
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