system ruby’ists-
on solairs 5.9 and ruby 1.6.8 this is a very silly thing to do :
pipe = IO.popen ‘while (test 1); do date; done’
since you can neither close the pipe nor exit your program willout send a
billion ‘Broken pipe’ messages to the screen. now, i realize this is a very
silly thing to do, and the pipe.close waits should call pclose, which would
wait4 for the child to die. my question is, shouldn’t their be a way to
signal a pipe’s child that it should die? shouldn’t IO.close do this? am i
just expecting too much?
what i am attempting to do is fork off several processes which will then fire
up some DRb servers. the problem is that i want the parent to be able to
learn the uri of each of the ‘child’ DRb objects without using sysvipc. i
attempted to do this using a PStore but it seems to be poorly behaved where
fork/threads are concerned. so, i was thinking that if i could fork in such a
manner that i would maintain communications between parent and child
(pipe/fork or popen) that could solve my problems. the problems with this is
that DRb servers (forked children) never die as in the ‘while’ loop above,
and thus program shut down becomes difficult. i don’t know if any of that
made sense, but ideas/suggestions are welcome.
-a
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Ara Howard
NOAA Forecast Systems Laboratory
Information and Technology Services
Data Systems Group
R/FST 325 Broadway
Boulder, CO 80305-3328
Email: ahoward@fsl.noaa.gov
Phone: 303-497-7238
Fax: 303-497-7259
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