It looks like the snippet checks whether a child is still running (by checking if the pipe is still open). system doesn't run a child in parallel, so your suggestion would help. It seems to me the solution would involve fork+exec (not recommended for Windows), system 1, ... (undocumented? Windows only), Win32::Process (Windows only), IPC::Open2, IPC::Open3, IPC::Run or IPC::Run3, but not system.

In reply to Re^2: How to check a executable's status while running it. by ikegami
in thread How to check a executable's status while running it. by Nesh

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