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- From: curt@ekhadafi.austin.ibm.com (Curt Finch 903 2F021 curt@aixwiz.austin.ibm.com 512-838-2806)
- Subject: Re: process numbers
- Sender: news@austin.ibm.com (News id)
- Message-ID: <BzMqs8.1Krz@austin.ibm.com>
- Date: Mon, 21 Dec 1992 22:07:20 GMT
- References: <GEUDER.92Dec21195041@priamos.informatik.uni-stuttgart.de>
- Organization: IBM AWD, Austin
- Lines: 21
-
- geuder@informatik.uni-stuttgart.de (Uwe Geuder) writes:
- >In nearly all Unixes I've seen so far process numbers are assigned
- >consecutively. Thereby process numbers give an indication of the
- >process creation rate, which is an interesting factor of system
- >utilization. However, in AIX (at least in 3.2, but I think it holds
-
- My understanding is that it was done for security reasons. Any casual
- user can figure out if system activity is high by forking a process and
- looking at the current pid of that process, even if they don't have
- permissions to execute 'ps.'
-
- On some super secret military machine this would allow Joe-user to
- figure out when all the missiles were being launched, (since that
- no doubt requires forking lots of processes.)
-
- That's the (ir)rational behind that one, or so the rumour goes.
-
- --
- curt@aixwiz.austin.ibm.com (Curt L. Finch) | AIX NFS/NIS Field Quality
- My views are unrelated to my employer's | Austin, TX
- There'll be too many elderly in 30 years for your kids to afford all the FICA.
-