Is wait not interruptable?

[Dave Yost <Dave@xxxxxxxx>]

Title: Is wait not interruptable?

Hi.

This program isn't working as I would expect:

> #!/bin/zsh
>
> (sleep 3 ; echo A) &
> proc1=$!
> (sleep 4 ; echo B) &
> proc2=$!
> trap 'echo kill $proc2 $proc1 ; kill $proc2 $proc1'
> INT
> wait $proc1
> kill $proc2
> #ps

Here's what it does:

> 315 Z% wait-kill-test
> A
> 316 Z% wait-kill-test
> ^Ckill 4099 4098
> 317 Z% echo $ZSH_VERSION
> 4.2.3
> 318 Z% uname -a
> Darwin ip2 8.8.2 Darwin Kernel Version 8.8.2: Thu Sep 28
> 20:43:26 PDT 2006; root:xnu-792.14.14.obj~1/RELEASE_I386 i386
> i386
> 319 Z%

In the second run, the ^C was typed 1 second after the command was started, and the first sleep plodded along to completion for its full 3 seconds.  Why wasn't the first sleep killed by the kill command in the trap?  This is on Mac OS X 10.4.8.

When I run this code with Bash 2.05b.0(1)-release, the ^C does cause the first sleep to be killed instantly.

I need this to work correctly for an enhancement to

  http://Yost.com/computers/d

That will allow you to say that you want to tail -f the output until the backgrounded completes or until you type ^C.

Thanks

Dave