On Sun, 5 Aug 2007, Chu Qiu wrote:
> I get some new results , but i don't unterstand what's going on?
>
> 1. I login the system as root , and complied my code , then run it ,
> everything is ok
> 2. I login the system as no-root , run the program complied by root , get
> this code "PAM_AUTHINFO_UNAVAIL"
pam_unix.so, as it was said previously, requires access to /etc/shadow, which
is of course denied to processes not running as root.
> 3. I login the system as no-root , complied my code ,then run the program ,
> get this code "PAM_AUTHINFO_UNAVAIL"
The same notice as above is applicable here.
> 4. I login the system as no-root ,then run "sudo chmod u+s check_user" on
> the program i just complied, run it ,
> I get the code "PAM_AUTHINFO_UNAVAIL"
>
'chmod u+s check_user' makes your program setuid to the owner of the file
'check_user', which is, af far as I got you, non-root.
--
Sincerely Your, Dan.
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