Open3

Open3 grants you access to stdin, stdout, stderr and a thread to wait for the child process when running another program. You can specify various attributes, redirections, current directory, etc., of the program in the same way as for Process.spawn.

• #popen3 : pipes for stdin, stdout, stderr

• #popen2 : pipes for stdin, stdout

• #popen2e : pipes for stdin, merged stdout and stderr

• #capture3 : give a string for stdin; get strings for stdout, stderr

• #cap

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