[clug] Next in my series of "how to do things in /bin/sh that you probably shouldn't".

[Kim Holburn]

Another way of doing this slightly differently:

exec > logfile.txt 2>&1

In another window:
tail -f logfile.txt
less +F logfile.txt


On 2009/Aug/20, at 2:39 AM, Andrew Janke wrote:

> Suppose that I want to send all output from a shell script to a
> logfile as well as displaying it (within the script). To simply send
> everything in a shell script I can just do this somewhere near the top
> of the script:
>
>   exec > logfile.txt 2>&1
>
> But I am greedy, as such it is a pity you can't just do this:
>
>   exec | tee logfile 2>&1
>
> So instead the only way I know of doing this is as such:
>
> #! /bin/sh
>
> # set up
> OPIPE=output.pipe
> if [ ! -e $OPIPE ]; then mkfifo $OPIPE; fi
> tee output.log < $OPIPE >&1 &
> tpid=$!
> exec > $OPIPE 2>&1
>
>
> echo "here is where we do things $tpid"
>
>
> # clean up
> exec 1>&- 2>&-
> wait $tpid
> rm $OPIPE
>
>
> Seems like an awful amount of work for a simple thing, anyone know a
> better way?  Answers of "use python/perl/<some other language>" will
> be dutifully ignored.
>
> Thanks
>
>
> --
> Andrew Janke
> (a.janke at gmail.com || http://a.janke.googlepages.com/)
> Canberra->Australia    +61 (402) 700 883
> -- 
> linux mailing list
> linux at lists.samba.org
> https://lists.samba.org/mailman/listinfo/linux

-- 
Kim Holburn
IT Network & Security Consultant
Ph: +39 06 855 4294  M: +39 3494957443
mailto:kim at holburn.net  aim://kimholburn
skype://kholburn - PGP Public Key on request