From: Jean-Marc Beroud <jean-marc.beroud@...>
Date: 2001-04-24T16:09:55+09:00
Subject: [ruby-talk:14142] Re: threads and IO.popen questions

Clemens Wyss <wys@helbling.ch> wrote:
> the lobal variable $? contains the "exit code" of the last call:
> I.e.:
> output = IO.popen( "gzip -cd #{file}" )
> if not($? == 0) then
>  print ("Error #{output.read()}")      
> end

Doesn't work for me. The value of $? is not set on both cases.
This seems to be a bug. Example:

$ rm test.gz
$ ruby -e'f = IO.popen( "gzip -cd test.gz" ); puts "code = <#{$?}>"'
test.gz: No such file or directory
code = <>

$ echo "hello" | gzip - > test.gz
$ ruby -e'f = IO.popen( "gzip -cd test.gz" ); puts "code = <#{$?}>"'
code = <>

$ ruby -v
ruby 1.6.3 (2001-03-19) [sparc-solaris2.7]

Greets

/jm