On Tue, 1 Jun 2010 15:55:32 +0100 Martin Simmons <mar...@lispworks.com> wrote: > > Check the value returned by c-wait, because it sounds like it is getting an > error. If it returns -1, then you need to check errno. > > You should also use unwind-protect to ensure that foreign-free is called (or > use with-foreign-pointer instead of foreign-alloc and foreign-free).
When I tried, CLISP crashed. > > I don't know about CLISP, but your code will not work reliably if the Lisp > implementation calls wait itself (e.g. in response to SIGCHLD). If possible, > I would use a implementation-supplied function instead of trying to implement > execute-program yourself. > I hoped to be able to get a common implementation of that function but given the time I am wasting and the amount of low-level and implementation-dependant stuff I will follow your advice. Luckily both CFFI and SBCL come with similar functions. > __Martin > -- Lorenzo Villani <lvill...@binaryhelix.net>
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