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https://github.com/ruby/ruby.git
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56 lines
895 B
Ruby
56 lines
895 B
Ruby
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# Usage:
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# require "open3"
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#
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# in, out, err = Open3.popen3('nroff -man')
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# or
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# include Open3
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# in, out, err = popen3('nroff -man')
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#
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module Open3
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#[stdin, stdout, stderr] = popen3(command);
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def popen3(cmd)
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pw = IO::pipe # pipe[0] for read, pipe[1] for write
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pr = IO::pipe
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pe = IO::pipe
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pid = fork
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if pid == nil then # child
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pw[1].close
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STDIN.reopen(pw[0])
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pw[0].close
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pr[0].close
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STDOUT.reopen(pr[1])
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pr[1].close
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pe[0].close
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STDERR.reopen(pe[1])
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pe[1].close
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exec(cmd)
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exit
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else
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pw[0].close
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pr[1].close
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pe[1].close
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pi = [ pw[1], pr[0], pe[0] ]
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end
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end
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module_function :popen3
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end
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if $0 == __FILE__
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a = Open3.popen3("nroff -man")
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Thread.start do
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while gets
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a[0].print $_
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end
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a[0].close
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end
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while a[1].gets
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print ":", $_
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end
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end
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