/usr/share/doc/ruby-systemu/examples/a.rb is in ruby-systemu 2.6.4-1.
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1 2 3 4 5 6 7 8 9 10 11 | #
# systemu can be used on any platform to return status, stdout, and stderr of
# any command. unlike other methods like open3/popen4 there is zero danger of
# full pipes or threading issues hanging your process or subprocess.
#
require 'systemu'
date = %q( ruby -e" t = Time.now; STDOUT.puts t; STDERR.puts t " )
status, stdout, stderr = systemu date
p [ status, stdout, stderr ]
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