This article was posted to the Usenet group alt.hackers in
1995; any technical information is probably outdated.
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Re: Help with a tcsh hack
Article: 8224 of alt.hackers Newsgroups: alt.hackers From: adair@scr.siemens.com (Jonathan Adair) Subject: Re: Help with a tcsh hack Message-ID: DBKKH7.H6w@scr.siemens.com Sender: news@scr.siemens.com (NeTnEwS) Nntp-Posting-Host: sunra.scr.siemens.com Organization: Siemens Corporate Research, Princeton NJ Date: Tue, 11 Jul 1995 20:48:41 GMT Approved: alt.hackers@aol.com Lines: 36 Status: RO
In article <DBK5w6.7IL@prl.philips.co.uk>, Ben Hodson <hodsonb@prl.philips.co.uk> wrote: ... > >ie. I want to change the userid that come up. I have tried >various things setting $user and $uid and stuff but to no avail :-( > >Any ideas ? A lot of stuff still trusts /etc/utmp for the username. If it is writeable (many are), you might try twiddling the username there. I have a short piece of code that does this. I even set off a little panic by messing around and changing someone else's utmp entry once. There are interesting applications. Some are even legitimate. For a while, I would post short notices there for people fingering my machine: Login Name TTY Idle When Where adair Jonathan Adair co 46 Thu 15:30 AtLunch Back by 1:30 p2 46 Thu 12:30 And before people start asking, no I won't send you a copy of my code. As I was once told, "Only a true wizard knows the spell of invisibility." Type "man utmp" and hack away. -- Jonathan E. Adair Web Page: http://marathon.csee.usf.edu/adair/ adair@scr.siemens.com (primary address for now) PGP Key (617E4D49) Fingerprint adair@bigpine.csee.usf.edu (almost permanent address) 12 54 48 F3 EA B4 E7 9C ccastje@prism.gatech.edu (many moons ago) F9 85 CD F5 17 60 B3 76
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