I was wondering if it's normal that the root directory / should be owned by “root”.
I get asked for my password every time I want to do something there (e.g. save a file, create a directory) and I don't remember this happening before (though this may just be my faulty memory).
Here's the relevant terminal output:
MacBook:~ ago$ ls -lah /
total 37311
drwxr-xr-x@ 35 root staff 1,2K 22 Mar 12:34 .
drwxr-xr-x@ 35 root staff 1,2K 22 Mar 12:34 ..
-rw-rw-r--@ 1 root admin 21K 22 Mar 10:21 .DS_Store
drwx------ 3 root admin 102B 28 Feb 2008 .Spotlight-V100
d-wx-wx-wt 2 root admin 68B 31 Ago 2009 .Trashes
-rw-r--r--@ 1 ago 501 45K 23 Gen 2008 .VolumeIcon.icns
srwxrwxrwx 1 root staff 0B 22 Mar 12:34 .dbfseventsd
---------- 1 root admin 0B 23 Giu 2009 .file
drwx------ 27 root admin 918B 22 Mar 10:55 .fseventsd
-rw-r--r--@ 1 ago admin 59B 30 Ott 2007 .hidden
-rw------- 1 root wheel 320K 30 Nov 11:42 .hotfiles.btree
drwxr-xr-x@ 2 root wheel 68B 18 Mag 2009 .vol
drwxrwxr-x+ 276 root admin 9,2K 19 Mar 18:28 Applications
drwxrwxr-x@ 21 root admin 714B 14 Nov 12:01 Developer
drwxrwxr-t+ 74 root admin 2,5K 18 Dic 22:14 Library
drwxr-xr-x@ 2 root wheel 68B 23 Giu 2009 Network
drwxr-xr-x 4 root wheel 136B 13 Nov 17:49 System
drwxr-xr-x 6 root admin 204B 31 Ago 2009 Users
drwxrwxrwt@ 4 root admin 136B 22 Mar 12:35 Volumes
drwxr-xr-x@ 39 root wheel 1,3K 13 Nov 17:44 bin
drwxrwxr-t@ 2 root admin 68B 23 Giu 2009 cores
dr-xr-xr-x 3 root wheel 5,1K 17 Mar 11:29 dev
lrwxr-xr-x@ 1 root wheel 11B 31 Ago 2009 etc -> private/etc
dr-xr-xr-x 2 root wheel 1B 17 Mar 11:30 home
drwxrwxrwt@ 3 root wheel 102B 31 Ago 2009 lost+found
-rw-r--r--@ 1 root wheel 18M 3 Nov 19:40 mach_kernel
dr-xr-xr-x 2 root wheel 1B 17 Mar 11:30 net
drwxr-xr-x@ 3 root admin 102B 24 Nov 2007 opt
drwxr-xr-x@ 6 root wheel 204B 31 Ago 2009 private
drwxr-xr-x@ 64 root wheel 2,1K 13 Nov 17:44 sbin
lrwxr-xr-x@ 1 root wheel 11B 31 Ago 2009 tmp -> private/tmp
drwxr-xr-x@ 17 root wheel 578B 12 Set 2009 usr
lrwxr-xr-x@ 1 root wheel 11B 31 Ago 2009 var -> private/var
Are these ownerships / permissions ok? Should I chmod/chown something?
Answer
I just checked a couple of relatively clean OS X 10.6 Macs, and while / is owned by root, its group and permissions are different from what you have: it's assigned to the admin group, and has group write and the sticky bit set, and doesn't have an extended attributes (i.e. drwxrwxr-t 29 root admin). Disk Utility's permissions repair feature doesn't seem to reset this (I just tried), but you can fix it by hand:
sudo chgrp admin /
sudo chmod 1775 /
xattr -l /
The last command will display the extended attributes attached to the root; depending on what they are, you may want to remove them (use sudo xattr -d attrname /).
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