Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!brutus.cs.uiuc.edu!samsung!emory!mephisto!prism!gt2500a
From: gt2500a@prism.gatech.EDU (FLUR)
Newsgroups: comp.sys.next
Subject: Question about setuid bit
Message-ID: <5608@hydra.gatech.EDU>
Date: 2 Feb 90 16:19:10 GMT
Reply-To: flur@duke.gatech.edu ()
Distribution: na
Organization: Georgia Institute of Technology
Lines: 54


I wrote a stupid little script to change my serial port from input 
to output by simply having two copies of the ttys file.  I then
made the script publicly executable with chmod 4755 from root, but when
I execute the script from my own account, it tells me I don't have 
permission.  Is this a problem, or am I doing something wrong?  The
script follows:
--------------------
Script started on Fri Feb  2 11:17:28 1990
flur@duke> cat /LocalApps/GTNet
v#!/bin/csh
echo -n "Disabling port...."
@ users = `who | grep ttyda | wc -l `
@ kermit = `ps -aux | grep kermit | grep -v grep | wc -l`
@ uucp = `ps -aux | grep uucico | grep -v grep | wc -l`
if ( $users > 0 || $kermit > 0 || $uucp > 0 ) then
  echo ""
  echo "The port is busy.  Please try again later."
  exit
else
  echo "done."
  echo ""
  cp /etc/ttys.outgoing /etc/ttys
  kill -HUP 1
  echo "Using kermit to connect to GTNet."
  echo "Type connect <ret> <ret> <ret> to start GTNet."
  echo ""
  /LocalApps/kermit
  echo -n "Enabling port...."
  cp /etc/ttys.incoming /etc/ttys
  kill -HUP 1
  echo "done."
endif
flur@duke> /LocalApps/GTNet
csh: Permission denied
flur@duke> ls -l !$
flur@duke> ls -l /LocalApps/GTNet
-rwsr-xr-x  1 root         618 Jan 31 14:15 /LocalApps/GTNet*
flur@duke> 

script done on Fri Feb  2 11:17:53 1990
--------------------

Please --- no flames on the stupid script (except if it is the cause
of the problem)!

Thanks
Peter
   ----------------------------Peter Flur----------------------------
			   USMAIL: Box 32500
   Georgia Tech, School of Electrical Engineering, Atlanta, GA  30332
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	INTERNET: flur@duke.gatech.edu, gt2500a@prism.gatech.edu
	                 PHONE: (404) 853-9355