SUID and shell

[jg156310]

Hello,

my question : i want a shell read a file but i don't want that the users can read this file with the cat (or more...) command. This file contains an important user/password.

test done : i put a sticky bit on my shell and restricted access on my file.

Result : execution shell with root login = ok
execution shell with user login = ko (no access file)

my shell :
-r-sr-xr-x 1 root system 30 /home/prc/jpg.prc

my /home/fic/jpg.txt file :
-rwx------ 1 root system 34 /u/fic/jpg.txt

Other solution based on shell command ?

Thanks for answers.

 

[bi]

if you give a file permissions of 700 (which you have), only the owner of that file will be able to cat the file. So, only root can cat /u/fic/jpg.txt.

If you want user:staff to be able to cat the file but no one else (except root) just change the ownership.

Does this answer your question?

 

[donttreadonme]

Shell cannot execute suid/sgid for security purposes.

 

[jg156310]

Thanks for the answer.