From: Daniel Bretoi <lists@...>
Date: 2003-04-05T07:33:57+09:00
Subject: Re: reading from $stdout ???


I recently posted something to log stdout AND stderr:

require 'open3'
def doit(command)
   logfile = command.shift
   threads = []
   Open3.popen3(command.join(' ')) { |inp,out,err|
      fh = File.open(logfile,"w")

      threads <<  Thread.new(out) { |out|
         out.each { |line| puts line; fh.print line }
      }
      threads <<  Thread.new(err) { |err|
         err.each { |line| puts line; fh.print line }
      }
      threads.each { |t| t.join }
   }
   $? >> 8
end

exit doit(ARGV)

for example: system.rb mylslog ls

will log everything in mylslog while printing it to the stdout.

hope this helps,

db


On Sat, Apr 05, 2003 at 07:21:50AM +0900, meinrad<dot>recheis wrote:
> hi rubyists,
> 
> is it possible to trap everything that was written to the $stdout by 
> system 'ls' for instance?
> 
> i d like to somehow read what was written to the output stream for 
> graphical output.
> 
> how would you do this?
> 
> Thanks,
> - Meinrad
> 

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----- End forwarded message -----

-- 
Apr  5 	Thomas Hobbes born, 1588, philosopher
Apr  4 	Tandy Corp. acquires Radio Shack, 1963 (9 stores)
Apr  4 	Gandalf visits Bilbo (LOTR)
Apr  4 	Martin Luther King assassinated in Memphis, Tennessee, 1968
Apr  4 	NATO Established, 1949
Apr  6 	Joseph Smith founds Mormon Church, 1830
Apr  4 	Ching Ming Festival in Hong Kong
Apr  4 	Liberation Day in Hungary
Apr  4 	National Day in Senegal
Apr  5 	Arbor Day in South Korea
Apr  5 	Tomb Sweeping Day in Taiwan
Apr  6 	Chakri Memorial Day in Thailand
Apr  6 	Victory Day in Ethiopia
Apr  4 	Muddy Waters (McKinley Morganfield) is born in Rolling Fork,
	Mississippi, 1915
Apr  6*	Daylight Savings Time begins; clocks move forward (1st Sunday of April)
Apr  4*	Omer 7th day
Apr  4*	Pesach (Last Day of Passover; 8th day of Pesach)
Apr  4*	Yizkor
Apr  5*	Omer 8th day
Apr  6*	Omer 9th day
Apr  6*	Parashat Shemini
Apr  6*	Shabbat Mevarekhim