[olug] chmod u+s

[Terry]

I think he set the bit on a script, not the actual log
file.


--- m0ntar3 at cox.net wrote:
> Setting the User-Identification-Bit on a log file
> doesn't give you 
> anything, it's actually pretty meaningless. Setting
> UID on the "cat" 
> executable with "root" ownership and allowing it to
> be executed by 
> "other" would give you more than you want.
> 
> Setting UID makes "the process" run as the user that
> owns the file from 
> which the process is mapped. Log files don't map to
> processes, log files 
> are read by processes.
> 
> The "cat" process, in this case, executes with the
> user permission 
> delivered by the interactive shell that launched the
> "cat" process. The 
> "cat" process, correctly, does not inherit the UID
> of the log file it reads.
> 
> The other question; should an interpreter process
> (sh, bash, awk, perl, 
> etcetera) inherit the UID of the interpreted file or
> keep the UID of the 
> binary that reads the interpreted file is largely
> philosophical---kind 
> of a liberty verses freedom thing ;)
> 
> Jay Hannah wrote:
> 
> >
> > Huh? What good is the setUID bit if it doesn't let
> me do this?
> >
> > Setup:
> > root at chinstrap log # ls -al mail.log.cat
> > -rwsr-xr-x    1 root     root           22 Jun  3
> 17:03 mail.log.cat
> > root at chinstrap log # cat mail.log.cat
> > cat /var/log/mail.log
> >
> > Try to use it:
> > jhannah at chinstrap log $ ./mail.log.cat
> > cat: /var/log/mail.log: Permission denied
> >
> > Gentoo, Linux 2.6.6
> >
> > j
> >
> > _______________________________________________
> > OLUG mailing list
> > OLUG at olug.org
> > http://lists.olug.org/mailman/listinfo/olug
> >
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> http://lists.olug.org/mailman/listinfo/olug


=====
Terry


	
		
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