On Tue, Nov 25, 2003 at 04:11:15PM -0500, lasalle@xxxxxxxx wrote:
> I have script that I use to effect the same change on all the computers I look after.
> It looks like this pretty much:
>
> printf "machine1:\n"
> ssh machine1 $1
> <<etc.>>
> Can someone recommend a way in which I can
> keep the speed and the meaningful output? Something simpler than sending
> STDOUT and STDERR to a different file for each machine?
Dunno 'bout simpler, but how about making a named pipe (mknod -p), spawn
a process to read the pipe, then run each of the above as a process
writing to the named pipe? A meaningless demo:
==START SCRIPT
mknod foobar p
(exec 0<foobar;
while read INLINE
do
echo "READER: $INLINE" >>OutFile;
done;
exit 0;)&
(sleep 2;echo "Proc 1"; echo "Output 1";exit 0) 2>&1 >foobar&
(sleep 1;echo "Proc 2"; echo "Output 2";exit 0) 2>&1 >foobar&
(sleep 9;echo "Proc 3"; echo "Output 3";exit 0) 2>&1 >foobar&
(sleep 4;echo "Proc 4"; echo "Output 4";exit 0) 2>&1 >foobar&
rm foobar;
==END SCRIPT
--
Dave Ihnat
ignatz@xxxxxxxxxx
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