chmod +s not working as expected 2003-11-27 - By Cameron Simpson
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On 14:45 27 Nov 2003, James Ho <james.ho@(protected)> wrote:
| I just transported a program from Red Hat Linux 6.2 to Red Hat Linux 7.3.
| The C program has a line stating:
| system ("whoami");
|
| The permission of the executable is 6777 (ie. -rwsrwsrwx) and the
| owner of the program is "user1".
|
| Using another user login "user99", I execute the program in both Red Hat
| Linux 6.2 and 7.3.
| In 6.2, I get the output "user1"
| In 7.3, I get the output "user99"
|
| Why is this? Is there any way I can get the program work as it did
| in Red Hat Linux 6.2?
I can imagine the kernel not allowing setuid to work on a publicly
writable file. The 7.3 box will have a newer (==> maybe more paranoid)
kernel. Try making the permissions 6555 or 6111 and see how it behaves.
Cheers,
--
Cameron Simpson <cs@(protected)> DoD#743
http://www.cskk.ezoshosting.com/cs/
If you 'aint falling off, you ar'nt going hard enough. - Fred Gassit
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