Special permissions

karanchhabra · 04-20-2016, 10:21 AM

Hi,

Can we setup suid's for directories?

Thanks.

Karan

TB0ne · 04-20-2016, 10:35 AM

Quote:

Originally Posted by karanchhabra

Hi,
Can we setup suid's for directories?

No. From a small bit of research (which you REALLY should try first):

https://en.wikipedia.org/wiki/Setuid...on_directories
https://www.gnu.org/software/coreuti...nd-Setgid.html

karanchhabra · 04-20-2016, 10:44 AM

Thanks. I will!!

Anyways suid is not working for the files either. Situation is shown below:

[root@rhcsa /]# ll -d t.sh
---------- 1 root root 9 Apr 20 12:45 t.sh
[root@rhcsa /]# chmod 4755 t.sh
[root@rhcsa /]# ll -d t.sh
-rwsr-xr-x 1 root root 9 Apr 20 12:45 t.sh
[root@rhcsa /]# su - karan
Last login: Wed Apr 20 15:26:58 IST 2016 on pts/0
[karan@rhcsa ~]$ vim /t.sh
[karan@rhcsa ~]$ """Write operation not working for other users even though suid is setup on the executable file"""

Kindly help.

Karan.

Quote:

Originally Posted by TB0ne

No. From a small bit of research (which you REALLY should try first):

https://en.wikipedia.org/wiki/Setuid...on_directories
https://www.gnu.org/software/coreuti...nd-Setgid.html

TB0ne · 04-20-2016, 10:54 AM

Quote:

Originally Posted by karanchhabra

Thanks. I will!!
Anyways suid is not working for the files either. Situation is shown below:

[root@rhcsa /]# ll -d t.sh
---------- 1 root root 9 Apr 20 12:45 t.sh
[root@rhcsa /]# chmod 4755 t.sh
[root@rhcsa /]# ll -d t.sh
-rwsr-xr-x 1 root root 9 Apr 20 12:45 t.sh
[root@rhcsa /]# su - karan
Last login: Wed Apr 20 15:26:58 IST 2016 on pts/0
[karan@rhcsa ~]$ vim /t.sh
[karan@rhcsa ~]$ """Write operation not working for other users even though suid is setup on the executable file"""

I think it's best if you actually tell us what you're trying to accomplish, rather than having us guess. Your other thread about a file with NO permissions and this, indicate you're trying to do something regarding security.

Perhaps if you told us your goal, we could help. Read the "Question Guidelines" link too...you're not providing many details at all about what kind of system, users, etc.

karanchhabra · 04-20-2016, 11:01 AM

I am new to linux and learning the internals of it. I am on the special permissions topic and doing some r&d in order to make my understanding of the concepts.

Since i am doing self learning so require some assistance in solving my questions, if possible!!

Thanks.

Quote:

Originally Posted by TB0ne

I think it's best if you actually tell us what you're trying to accomplish, rather than having us guess. Your other thread about a file with NO permissions and this, indicate you're trying to do something regarding security.

Perhaps if you told us your goal, we could help. Read the "Question Guidelines" link too...you're not providing many details at all about what kind of system, users, etc.