[TAG] More on filtering in-place

[Thomas Adam]

 --- Jason Creighton <androflux at softhome.net> wrote: 
> That occured to me. (*after* I posted my message, of course)

Of course, Jason.
 
> > > But I'm curious: How does this work at all? What, exactly, does
> > > [it] tell the shell?
> > 
> > '< file' says open "file" in read mode and call it file-descriptor 0
> (=stdin)
> > 
> > '1<> file' says open "file" in read/write mode (means notrunc open) 
> > 	and call it file-descriptor 1 (=stdout)
> 
> Cool, I didn't know this. (Well, obviously, otherwise I wouldn't be
> asking what it does.)

It's just using file descriptors.

2> /dev/null

-- Thomas Adam 

=====
"The Linux Weekend Mechanic" -- http://linuxgazette.net
"TAG Editor"                 -- http://linuxgazette.net

"<shrug> We'll just save up your sins, Thomas, and punish 
you for all of them at once when you get better. The 
experience will probably kill you. :)"

 -- Benjamin A. Okopnik (Linux Gazette Technical Editor)


	
	
		
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