Fri, 27 Apr 2012 19:54:05 +0200 wenzelm print errors on stderr;
Fri, 27 Apr 2012 19:50:32 +0200 wenzelm general exec_process -- nothing specific to Cygwin;
Fri, 27 Apr 2012 19:31:03 +0200 wenzelm more direct exec with synchronous exit code;
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