Boston Linux & Unix (BLU) Home | Calendar | Mail Lists | List Archives | Desktop SIG | Hardware Hacking SIG
Wiki | Flickr | PicasaWeb | Video | Maps & Directions | Installfests | Keysignings
Linux Cafe | Meeting Notes | Blog | Linux Links | Bling | About BLU

BLU Discuss list archive

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Discuss] test for *other* write permissions

> If using "stat" you can also get the perms in 755 format.  From here, I can
> easily do a bitwise & with 2, and I can easily find the world write bit.  But bash
> arithmetic doesn't view the number "755" in octal...  It operates decimal.  So I
> can't bitwise & with 16, or with 020.  I have to strip off the last character, and
> then bitwise 75 with & 2.  So once again, given my previous comments about
> leading and trailing spaces and stuff, plus, not knowing how to get the nth
> character of a string, I'm not really sure there's a good solution here.

My next best idea is to take the number 755, divide by 10 to get 75, and then & 2

BLU is a member of BostonUserGroups
BLU is a member of BostonUserGroups
We also thank MIT for the use of their facilities.

Valid HTML 4.01! Valid CSS!

Boston Linux & Unix /