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Re: [doc] read -t and sockets, devices...


From: Stephane Chazelas
Subject: Re: [doc] read -t and sockets, devices...
Date: Sun, 15 Jun 2008 10:38:23 +0100
User-agent: Mutt/1.5.16 (2007-09-19)

On Sat, Jun 14, 2008 at 10:15:06PM -0400, Chet Ramey wrote:
> Stephane Chazelas wrote:
>
>> What about a different $? (like 2 for timeout)?
>
> That's reasonable.  I'm thinking 128+SIGALRM.
[...]

That makes sense, but it's a bit of a pain to handle.

read -t 10 var; ret=$?
case $ret in
  (0) OK;;
  (1) EOF;;
  (*) if [ "$ret" -gt 128 ] && [ "$(kill -l "$ret")" = ALRM ]
      then TIMEOUT
      else UNKNOWN
      fi
      ;;
esac

-- 
St├ęphane




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