Xref: utzoo comp.unix.wizards:15191 comp.bugs.sys5:817
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!hc!lll-winken!uunet!steinmetz!davidsen
From: davidsen@steinmetz.ge.com (Wm. E. Davidsen Jr)
Newsgroups: comp.unix.wizards,comp.bugs.sys5
Subject: Re: setuid (euid) after setuid (uid) on System 5
Message-ID: <13416@steinmetz.ge.com>
Date: 24 Mar 89 13:56:00 GMT
References: <123@cat.Fulcrum.BT.CO.UK> <280@cbnewsc.ATT.COM> <1196@auspex.UUCP>
Reply-To: davidsen@crdos1.UUCP (bill davidsen)
Organization: General Electric CRD, Schenectady, NY
Lines: 15


  The setuid behavior gets to be a real pain in the case where a program
is running setuid (not root) and needs to run another program to perform
some task. The execed program runs with its uid and euid set to the uid
rather than the euid, and there's no reasonable way to change this, such
as setuid(geteuid()) in BSD.

  I hit this all the time on a BBS, where the bbs program runs setuid to
the BBS uid, and a file transfer using a protocol program is to be done.
I found a way by it, but it's ugly, and the only thing in the whole
system which requires root permission (to install not run).
-- 
	bill davidsen		(wedu@crd.GE.COM)
  {uunet | philabs}!steinmetz!crdos1!davidsen
"Stupidity, like virtue, is its own reward" -me