On Fri, 2005-07-22 at 15:50 +0200, Marco Weber wrote: > # we have two users, marla and tyler: > /etc/passwd > marla:x:1006:1006:Marla Singer,,,:/home/marla:/bin/bash > tyler:x:1007:1007:Tyler Durden,,,:/home/tyler:/bin/bash > > # they're default group is coresponding to their username, furthermore they > # are both member of the group slide > /etc/group > slide:x:183:marla,tyler > marla:x:1006: > tyler:x:1007: > > # and here we go... > > [EMAIL PROTECTED]:/ # mkdir folder > [EMAIL PROTECTED]:/ # ls -lah | grep folder > drwxr-xr-x 2 root root 4.0K Jul 22 12:41 folder > [EMAIL PROTECTED]:/ # chgrp slide folder > [EMAIL PROTECTED]:/ # chmod -R 0774 folder > [EMAIL PROTECTED]:/ # cd folder > [EMAIL PROTECTED]:/folder # touch still.default.umask.022 > [EMAIL PROTECTED]:/folder # ls -lah > total 8.0K > drwxrwxr-- 2 root slide 4.0K Jul 22 12:45 . > drwxr-xr-x 25 root root 4.0K Jul 22 12:41 .. > -rw-r--r-- 1 root root 0 Jul 22 12:45 still.default.umask.022 > [EMAIL PROTECTED]:/folder # umask 002 > [EMAIL PROTECTED]:/folder # touch now.umask.002 > [EMAIL PROTECTED]:/folder # ls -lah > total 8.0K > drwxrwxr-- 2 root slide 4.0K Jul 22 12:46 . > drwxr-xr-x 25 root root 4.0K Jul 22 12:41 .. > -rw-rw-r-- 1 root root 0 Jul 22 12:46 now.umask.002 > -rw-r--r-- 1 root root 0 Jul 22 12:45 still.default.umask.022 > [EMAIL PROTECTED]:/folder # su marla > [EMAIL PROTECTED]:/folder$ id > uid=1006(marla) gid=1006(marla) groups=183(slide),1006(marla) > [EMAIL PROTECTED]:/folder$ mkdir ballcancer > [EMAIL PROTECTED]:/folder$ ls -lah > total 12K > drwxrwxr-- 3 root slide 4.0K Jul 22 12:47 . > drwxr-xr-x 25 root root 4.0K Jul 22 12:41 .. > drwxrwxr-x 2 marla marla 4.0K Jul 22 12:47 ballcancer > -rw-rw-r-- 1 root root 0 Jul 22 12:46 now.umask.002 > -rw-r--r-- 1 root root 0 Jul 22 12:45 still.default.umask.022 > > # bingo! > # [EMAIL PROTECTED]:/ # chmod -R 6774 folder > # would have set the folder sticky > # then the just created directory ballcancer would look like this: > # drwsrwsr-x 2 marla slide 4.0K Jul 22 12:47 ballcancer > # -and thus would be writable by tyler, but: > # drwxrwxr-x 2 marla marla 4.0K Jul 22 12:47 ballcancer > # is just the premission/group setting you're looking for... > > [EMAIL PROTECTED]:/folder$ echo "you're a monster" >> ballcancer/textfile > [EMAIL PROTECTED]:/folder$ exit > exit > [EMAIL PROTECTED]:/folder # su tyler > [EMAIL PROTECTED]:/folder$ id > uid=1007(tyler) gid=1007(tyler) groups=183(slide),1007(tyler) > [EMAIL PROTECTED]:/folder$ cd ballcancer/ > [EMAIL PROTECTED]:/folder/ballcancer$ cat textfile > you're a monster > [EMAIL PROTECTED]:/folder/ballcancer$ echo "ymmaavstiml" >> cognition > bash: cognition: Permission denied > > # (I gues) this is it... > > # Hope I've conjured a smile on your face ;) > > # Marco Weber > > # PS: I'm canceling debian-user-ml membership for [EMAIL PROTECTED] > # PPS: I'm now known as [EMAIL PROTECTED] - cu around... >
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