create process with redirections

[Fabrice Le Fessant]

Hi,

  I have another problem while translating Lwt code to Async: Lwt_process.exec can take a set of arguments containing `FD_MOVE fd for stdin, stdout and stderr, and redirecting directly the stdin/stdout/stderr of the created process to these file descriptors.

  Are there similar helper functions in Async ? I looked in Process, but stdin/stdout/stderr can only be accessed through the (active) use of Readers/Writers to forward data from the file to stdin, and from stdout/stderr to files. Is there something else that I can use ?

--Fabrice

[Arseniy Alekseyev]

You can try using [Async_extended.Process.create_fds].

If that doesn't work, you can try doing it with a combination of calls to [Core.Std.Unix.{fork,dup2,exec}].

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