[Gauche-devel] pipe chain

[Lasse K. <las...@ma...>]

How can I connect serveral sub-processes by pipes, like in shell 
I do with 'cmd1 | cmd2 | cmd3' ?

Best I came up with is:

  (call-with-input-process
    '("cmd1")
    (lambda (pipe-left-end)
      (call-with-output-process
        '("cmd2")
        (lambda (pipe-right-end)
          (copy-port pipe-left-end pipe-right-end))))))

This seems to work. However, I do not see a way to redirect 
stdout of 'cmd2' to stdin of a 'cmd3'.

I have the feeling, I'm missing something fundamental here.

Thanks for a hint!
Lasse