I think there's a bug.
(execlp "ls" "") will access.
Since the second parameter is optional, scm_execlp doesn't handle exec_argv
unbounded situation.


On Wed, Nov 23, 2011 at 12:06 AM, Paul Emsley <paul.emsley@bioch.ox.ac.uk>wrote:

>
> Hi,
>
> I am trying to see if there is a way to determine if a program is in the
> path (i.e. a bit like "which"), returning a #t or #f answer.  I was looking
> execl and execlp.
>
> The documentation for execl says:
>
> > Executes the file named by path as a new process image
>
> what is path ?  I'm guessing that that should be "filename".
>
> While playing around, I notice that
>
> (execlp "ls")
>
> produces a core dump.
>
> My question is then, *is* there a way to determine if a string is
> executable? (And if so, how? :-)
>
> Thanks,
>
> Paul.
>
>
>
>
>