Re: singleton for script with shebang

[Ole Tange]

On Thu, Jan 1, 2015 at 10:54 PM, Bradley Asztalos
<brad@customweather.com> wrote:

> But I'm wondering if it is possible to use shebang in this context as in:

It is.

> -------singleton.sh---------
>
> #!/opt/local/bin/parallel --shebang-wrap /bin/bash --semaphore --fg -u --id
> lock_id
> echo "start" $$
> sleep 10
> echo "end" $$
>
> ---------
>
> This does not work. Any ideas here?

You are going to say 'Doh'.

/bin/bash is not an argument for --shebang-wrap. It is the command you
want to be run. Also --semaphore --fg -u --id are not options for
bash. Swap them around and you are good:

#!/opt/local/bin/parallel --shebang-wrap --semaphore --fg -u --id
lock_id /bin/bash

(Here is where you say 'Doh').


/Ole