From: ahoward <ahoward@...>
Date: 2002-11-09T07:34:39+09:00
Subject: help - redirect/flush/sync problem


rubyists-

i thought i understood redirection, untill this:

  #!/usr/local/bin/ruby

  $stderr.reopen File.open 'stderr', 'w'
  $stderr.sync = true
  $defout.sync = true

  foo		      # this raises an exception...

  $defout.flush
  $defout.close
  $stderr.flush
  $stderr.close

  puts IO.readlines 'stderr', 'r'


i was expecting to see

  foo.rb:7: undefined local variable or method `foo' for #<Object:0x401dbce0> (NameError)

which IS in fact writtne to the file 'stderr', but not untill AFTER the script
finishes?  what gives?

i wanted to use this technique to catch NameErrors errors from cgi scripts...

-a


-- 

 ====================================
 | Ara Howard
 | NOAA Forecast Systems Laboratory
 | Information and Technology Services
 | Data Systems Group
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 | Email: ahoward@fsl.noaa.gov
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 | Fax:    303-497-7259
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