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Re: Parallel::ForkManager and vars from the parent script - are they accessible? (or do I need inter process communication?)

by Zaxo (Archbishop)
on Aug 08, 2007 at 18:19 UTC ( #631362=note: print w/ replies, xml ) Need Help??


in reply to Parallel::ForkManager and vars from the parent script - are they accessible? (or do I need inter process communication?)

The child gets a copy of the parent's vars but can never change the parent's copy. That's fundamental unix.

The parent can read data from a child through some IPC mechanism and make the change itself, but that won't change the copies already-launched children have. Yes, you need IPC.

Sysv IPC has a shared-memory facility which would seem to be just what you want, but sysv IPC is buggy with races and is rarely used.

After Compline,
Zaxo


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