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update doc.

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32827 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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akr 2011-08-03 12:18:50 +00:00
parent f9e9eee677
commit 454de1d5eb
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9
lib/open3.rb
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@ -70,6 +70,15 @@ module Open3
# #
# Closing stdin, stdout and stderr does not wait the process. # Closing stdin, stdout and stderr does not wait the process.
# #
# You should be careful to avoid deadlocks.
# Since pipes are fixed length buffer,
# Open3.popen3("prog") {|i, o, e, t| o.read } deadlocks if
# the program generates many output on stderr.
# You should be read stdout and stderr simultaneously (using thread or IO.select).
# However if you don't need stderr output, Open3.popen2 can be used.
# If merged stdout and stderr output is not a problem, you can use Open3.popen2e.
# If you really needs stdout and stderr output as separate strings, you can consider Open3.capture3.
#
def popen3(*cmd, &block) def popen3(*cmd, &block)
if Hash === cmd.last if Hash === cmd.last
opts = cmd.pop.dup opts = cmd.pop.dup