On Tue, Oct 18, 2011 at 1:00 AM, Mark H Weaver <mhw@netris.org> wrote:

> Nala Ginrut <nalaginrut@gmail.com> writes:
> > I realized that "waitpid" in Guile will cause my program crash while
> > "waitpid" actually returned -1. I believe it's unnecessary. I think
> > the better way is we deal with it by ourselves if "waitpid in POSIX"
> > returned -1. The SCM_SYSERROR bother me a lot. I hope my program
> > get robustness other than crash.
>
> The proper way to deal with this is to catch the system error, e.g.:
>
> (catch 'system-error
>  (lambda () (waitpid the-pid))
>  (lambda (key . args) 'waitpid-failed))
>
>     Best,
>       Mark
>

Oh thanks ,that's what I need.
But how can I find the error message like 'waitpid-failed? I can't find it
in the manual.