Path: utzoo!utgpu!utstat!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!aplcen!bink
From: bink@aplcen.apl.jhu.edu (9704)
Newsgroups: comp.unix.questions
Subject: Re: files recovery after rm?
Summary: Just a flame (I apologize -- I couldn't let it die so easily)
Message-ID: <3914@aplcen.apl.jhu.edu>
Date: 17 Nov 89 03:45:07 GMT
References: <16608@uhnix1.uh.edu> <20530@unix.cis.pitt.edu> <1989Nov9.162314.4713@virtech.uucp> <20551@unix.cis.pitt.edu> <1989Nov10.012648.8942@rpi.edu> <20559@unix.cis.pitt.edu> <15844@bloom-beacon.MIT.EDU>
Reply-To: bink@aplcen.apl.jhu.edu (Greg Ubben)
Organization: The Johns Hopkins University, Baltimore MD
Lines: 73

This was so amusing, I posted it at work.

In article <15844@bloom-beacon.MIT.EDU> Jonathan Kamens flames:
>   You have a lot of nerve talking pedantically to someone who
> obviously is more informed than you are.
> 
>   You have shown to the net, and to comp.unix.questions in particular,
> ignorance about several relatively basic subjects in the past couple
> of weeks.  That would not be so bad if you were *asking* questions,
> but you are *answering* them, and giving wrong answers in the process.
> 
>   When people do correct you, you have taken the position that you
> must know more than they do, even when you obviously do not.  [...]
> 
> In article <20559@unix.cis.pitt.edu> yahoo@unix.cis.pitt.edu (Kenneth L Moore)
> writes:
> >You are confusing umask with the actual mask. I set my mask to 111 000 000
> >by using a umask of 077 in my .cshrc. 	[well put]
> 
>   He is confusing nothing.  Mask and umask are identical terms in this
> situation.  Do you even understand why it is *called* a mask?  [...]

See flame above about posting wrong answers to "relatively basic subjects".
 
> 1. Somewhere in the process of creating the file, the open() function [...]

It's *called* creat() (usually), and it's a system call.

> >The first bit in the first word (pertaining to my privileges) is logically
> >anded with 1 giving me read privileges. The second bit is anded with [...]
> 
>   Actually, the whole umask is masked over the requested permissions
> when a file is created using a bitwise AND, not a logical AND.  [...]

*Actually*, there's not a whole heck of a lot of difference when you're
talking about one bit (as Mr. Moore was).  K&R (excuse the bitwise AND)
didn't coin the word "logical".

>   Yes, one which you obviously have gotten wrong.	[oh?]
> 
>   As has already been pointed out to you, setting your umask to 077
> will cause all files created by you to have permissions ---rw-rw- or

Anyone who's ever used umask can see this is wrong.  Contrary to your
followup, if you could show me just *one* place where Mr. Moore was wrong
and you weren't, I'd be surprised.  I think you owe this man an apology.
























					-- Greg Ubben
					   bink@aplcen.apl.jhu.edu
					   ...!uunet!mimsy!aplcen!bink