STDIN not working under Kernel.system
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Key: JRUBY-1923
URL: http://jira.codehaus.org/browse/JRUBY-1923
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Affects Versions: JRuby 1.1RC1
Environment: Mac OS X Leopard. Java 1.5.0_13. JRuby says "ruby 1.8.6
(2008-01-08 rev 5512) [ppc-jruby1.1RC1]".
Reporter: Johan Holmberg
When an external program is started with Kernel.system, the started process
should receive the STDIN of the JRuby script. Now JRuby simply seem to hang.
A short example will clarify (jruby will "hang" and never terminate):
$ (echo first ; echo second) | bin/jruby -e 'system "cat -n"'
but if MRI is used instead it works as expected (the output appears, and ruby
terminates):
$ (echo first ; echo second) | ruby -e 'system "cat -n"'
1 first
2 second
Looking at the source code of JRuby (src/org/jruby/util/ShellLauncher.java), it
appears the the code *tries* to handle STDIN/STDOUT/STDERR of the started
process. But just now it doesn't work.
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