Hi,
I don't know if OpenBSD has a different implementation of alloca(3) than
Linux. In Linux, alloca(3) (a.k.a. __builtin_alloca()) can't return
NULL, as it can't detect errors. The only way to detect an error is to
add a handler for SIGSEGV, AFAIK.
I found the following code in <lib/libc/gen/exec.c>:
argv = alloca((n + 1) * sizeof(*argv));
if (argv == NULL) {
errno = ENOMEM;
return (-1);
}
But of course, that NULL should never happen, right?
As a side note, I think you could encapsulate the code calling alloca(3)
into a helper macro, to avoid repetition.
I can prepare a patch if you confirm the bug.
Cheers,
Alex
--
Alejandro Colomar
Linux man-pages comaintainer; https://www.kernel.org/doc/man-pages/
http://www.alejandro-colomar.es/
