[sudo-users] Using wildcards in sudoers file

megadethpaw megadethpaw megadethpaw at hotmail.co.uk
Tue Sep 29 15:01:03 EDT 2009

Hi Robin,
I did hope that there would be a way that you could end the sudo command string, say as you can do by placing "" after a command to state no parameters are allowed.
Maybe an idea would be if the sudoers parser could see "" at the end of a command line and say that if a space appears and then any other text it's invalid, eg
/usr/bin/chown root /usr/sap/trans/[A-z]* ""
I know it's far from perfect as a filename could in theory have a space in it, but for 99% of cases I would imagine something such as the above would do the trick.
Thanks for the suggestion though Robin, all ideas gratefully accepted.

> From: Robin.Battersby-Cornmell at uisl.unisys.com
> To: megadethpaw at hotmail.co.uk; sudo-users at sudo.ws
> Date: Tue, 29 Sep 2009 17:10:34 +0100
> Subject: RE: [sudo-users] Using wildcards in sudoers file
> One potential way would be to script the "sudo chown ......" and validate somehow, e.g.
> 	#!/bin/ksh
> 	#
> 	# Rough and ready chown script
> 	#
> 	newowner=$1
> 	shift			# Drop $1 from parameter list
> 	for file in $@	# Loop for all subsequent parameters
> 	do
> 	   if [ ## Work out your file matching criteria here ## ]
> 	   then
> 	      chown $newowner $file
> 	   else
> 	      echo "Change of ownership on $file not allowed"
> 	   fi
> 	done
> Then secure the script and grant a specific sudo rule to allow the specific user to run it.
> Of course, there is no error checking written here really.  You should test that the target file does actually exist else the user will get other splattery messages.
> I hope that this helps.
> Robin
> -----Original Message-----
> From: megadethpaw megadethpaw [mailto:megadethpaw at hotmail.co.uk] 
> Sent: Tuesday, September 29, 2009 2:52 PM
> To: sudo-users at sudo.ws
> Subject: [sudo-users] Using wildcards in sudoers file
> Hi,
> I want to be able to give a user permission to use the "/usr/bin/chown" command on solaris using sudo, but only want them to be able to change files or directories under a certain directory, eg "/usr/sap/trans" and any directories underneath.
> Examples of commands I want to allow to run are:- /usr/bin/chown oracle /usr/sap/trans/file1.txt/usr/bin/chown brian /usr/sap/trans/data/filter.csv In the sudoers file I set up the command to allow to run as this:- /usr/bin/chown [A-z]* /usr/sap/trans/[A-z]* This works for the above two commands I do want to use, but it also allows things like this:- /usr/bin/chown brian /usr/sap/trans/data/filter.csv /etc/passwd Now as you can see this is a major problem as don't want to allow that, I basically want to make sure that the chown starts with "/usr/sap/trans" is there any way I can do this?
> Is there a way to exclude spaces from [A-z] in the suduers line?
> Please help as I really need to get this working.
> Thanks Jeff 		 	   		  
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