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We are running an external process using io.popen(). Something like ...

  ecom = assert(io.popen(cmd, 'r'))

Is there a way to setup non-blocking reads with this type of interface?
Or do other lua modules offer more control? What we've seen is that our
read() command will block if the external process does not have any data
to return. We need a strategy to make this non-blocking.

Thanks for any suggestions,


I don't know whether it's possible or easy to make pipes created by io.popen() non-blocking, however my Lua/APR binding [1] supports process management and pipes with configurable blocking behaviour (non-blocking, blocking and blocking with time out). It works in Windows and UNIX environments (and then some).

 - Peter