Tue, 19 Feb 2008 20:34:30 +0100 wenzelm added system_out (back to multithreaded version -- still suffers from non-interruptible wait in Poly/ML 5.1);
Tue, 19 Feb 2008 20:34:29 +0100 wenzelm removed General/system_process.ML (back to multithreaded version);
Tue, 19 Feb 2008 20:34:28 +0100 wenzelm replaced setpgrp by more elaborate setsid;
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