Ignacio Vazquez-Abrams ignacio at openservices.net
Fri Sep 21 12:20:27 EDT 2001

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On Fri, 21 Sep 2001, Greg Weeks wrote:

>     <  >  >>  2>  2>>  2>&1		# REDIRECTION

popen(..., 'w'), popen(..., 'r'), popen(..., 'r'), popen3(...),
popen3(...), popen4(...)

Note that I don't make a distinction between clobbering and appending; the
point of a programming language is to process data, not just push it around.

>     &					# BACKGROUND

Start a new thread and use the above.

>     |					# PIPING

popen(..., 'r') on one, popen(..., 'w') on the other.

>     $() or ``				# CAPTURING STDOUT

popen(..., 'r')

-- 
Ignacio Vazquez-Abrams  <ignacio at openservices.net>

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