On Fri, Mar 16, 2012 at 09:22 -0400, you wrote: > global myfile = open("| shasum > output"); I'm very reluctant to allow that without having script-level async I/O. What if the pipe blocks? Robin -- Robin Sommer * Phone +1 (510) 722-6541 * robin at icir.org ICSI/LBNL * Fax +1 (510) 666-2956 * www.icir.org