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addmodulefd(..., FDT_INTERNAL or FDT_MODULE);

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From: Sebastian Gniazdowski <psprint@xxxxxxxxxxx>
To: zsh-workers@xxxxxxx
Subject: addmodulefd(..., FDT_INTERNAL or FDT_MODULE);
Date: Wed, 14 Jun 2017 07:12:14 +0200
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Hello,
I read whole 36870 topic ("Mangement of fdtable[]") and it's hard to get insight on FDT_INTERNAL vs. FDT_MODULE. I now follow initial db_gdbm.c code which used FDT_INTERNAL. Is it a good choice?

I think both gdbm and redis support cloned file descriptor on fork(), because test cases work fine – database-store in subshell works correctly. This also points that file descriptor isn't closed when using FDT_INTERNAL with addmodulefd().

To note, hiredis (unlike libsqlite3) exposes file descriptor in redisContext::fd field, so it's nice that gdbm and redis behave the same.
--
Sebastian Gniazdowski
psprint /at/ zdharma.org

Follow-Ups:
- Re: addmodulefd(..., FDT_INTERNAL or FDT_MODULE);
  - From: Bart Schaefer

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