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Hold on; I was talking about the set-user-id permission flag.
You mean the ST_NOSUID, which you are right is a system option.

Anyway, the strange bevaior here is, in my opinion another one:
I'm...

Hi guys.
Thanks to both of you.

@corona688 The system is a CentOS.
[cesare@grmdcis06 tmp]$ uname -a
Linux grmdcis06.netikos.com 2.6.9-78.ELsmp #1 SMP Fri Jul 25 00:04:28 EDT 2008 i686 i686...

Hello all.
Despite the exec man page, the exec system call seems to turn my effective-user-id into my real-user-id.

I coded and compiled 2 very simple c programs as user 1 (uid=501)
The first...