Hi!
I need to get a username from an Unix path with this format: /home/users/myusername/project/number/files
I just want "myusername" I've been trying for almost a hour and I'm completely clueless.
Any idea?
Thanks!
+5
A:
Maybe just /home/users/([a-zA-Z0-9_\-]*)/.*?
Note that the critical part [a-zA-Z0-9_\-]* has to contain all valid characters for unix usernames. I took from here, that a username should only contain digits, characters, dashes and underscores.
Also note that the extracted username is not the whole matching, but the first group (indicated by (...)).
phimuemue
2010-07-06 13:04:36
He says his path is `/home/users/myusername/project/number/files`. Your regexp may only find `users`.
TK
2010-07-06 13:12:50
@TK: You're completely right. But I think he'll be clever enough to adapt it to his needs.
phimuemue
2010-07-06 13:14:19
You also need to be careful about anchoring. Any user can create the file `/tmp/home/users/root/project/number/files` :-)
psmears
2010-07-06 13:30:26
+1
A:
Check http://rubular.com/r/84zwJmV62G. The first match, not the entire match, is the username.
TK
2010-07-06 13:05:43
A:
(\/home\/users\/)([^\/]+)
The 2nd capture group (index 1) will be myusername
Robusto
2010-07-06 13:05:58
+2
A:
The best answer to this depends on what you are trying to achieve. If you want to know the user who owns that file then you can use the stat command, this unfortunately has slightly different syntax dependant on the operating system however the following two commands work
Max OS/X
stat -f '%Su' /home/users/myusername/project/number/files
Redhat/Fedora/Centos
stat -c '%U' /home/users/myusername/project/number/files
If you really do want the string following /home/users then the either of the Regexes provided above will do that, you could use that in a bash script as follows (Mac OS/X)
USERNAME=$(echo '/home/users/myusername/project/number/files' | \
sed -E -e 's!^/home/users/([^/]+)/.*$!\1!g')
Steve Weet
2010-07-06 17:22:25