Re: out of order execution of shell commands

[Olaf Hering <olh@suse.de>]

 On Thu, Oct 07, Olaf Hering wrote:

> 
> we have a weird bug where the open of the shell output redirection
> happens before the mkdir command returns.
> As a result, the redirection will fail. Unexpected data loss.

...
>         for l in `/bin/cat ten`; do
>           /bin/mkdir $h$i/$j/$k/$l
>           /bin/echo $h$i/$j/$k/$l > ./$h$i/$j/$k/$l/DIRNAME || /bin/kill -STOP `/bin/cat /dev/shm/bug42232-pid-*`
>           /bin/dd if=/dev/zero of=$h$i/$j/$k/$l/data bs=1024 count=1 &> /dev/zero
>         done
...

looks like the dd and the mkdir will get the same pid,
and bash can not deal with it.

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