On 2000-Apr-06 22:21:01 +1000, Mikhail Teterin <[EMAIL PROTECTED]> wrote:
>Peter Jeremy once stated:
>=The ports installation process makes /usr/local/bin/netscape a small
>=shellscript which sets a couple of environment variables, turns off
>=core dumps (ulimit -c 0) and then exec's the netscape binary. This
>=means you won't find any droppings lying around.
>
>Yeah, but it used to be, it would not even say '(core dumped)' if there
>was not one. Now it will say that even if no dump was made. Kind of
>misleading, although, I'm sure there is some reason for it.
This was done as part of PR kern/14540, committed in
/sys/kern/kern_sig.c 1.68 (30th October 1999) and 1.53.2.6 (22nd
November 1999). This PR changed the behaviour where the core image
would be larger than the processes RLIMIT_CORE. Previously a corefile
would not be created at all, now the corefile is truncated to
RLIMIT_CORE. If RLIMIT_CORE is zero, then no core file is created,
but coredump() returns success - leading to the `core dumped' message.
Presumably, the lower-level function (p->p_sysent->sv_coredump()) used
to return an error when the core file was truncated (I haven't chased
that function down).
I agree, this behaviour is somewhat counter-intuitive. Maybe it
deserves a PR to change it. Feel free to submit one.
Peter
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