From mboxrd@z Thu Jan  1 00:00:00 1970
From: dave@horsfall.org (Dave Horsfall)
Date: Sat, 26 Sep 2015 08:05:42 +1000 (EST)
Subject: [TUHS] Re {TUHS}  Synchronous vs Asynchronous IO in Unix
In-Reply-To: <201509211402.t8LE2E4K016401@coolidge.cs.Dartmouth.EDU>
References: <201509211402.t8LE2E4K016401@coolidge.cs.Dartmouth.EDU>
Message-ID: <alpine.BSF.2.11.1509260755080.44325@aneurin.horsfall.org>

On Mon, 21 Sep 2015, Doug McIlroy wrote:

> Signal() was there first and foremost to support SIGKILL; it did not 
> purport to provide a sound basis for asynchronous IPC.

Yeah, brother.  In a previous life, I got burned very badly when I relied 
upon signals Doing the Right Thing [tm].

I think it was dump/restor, on a BSDi box; the damned thing communicated 
betwixt its child processes with signals, and I lost every backup tape 
without realising it.

-- 
Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will suffer."
              Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn!