-/* $Cambridge: exim/src/src/deliver.c,v 1.47 2009/11/16 19:50:36 nm4 Exp $ */
+/* $Cambridge: exim/src/src/deliver.c,v 1.48 2010/06/05 10:04:44 pdp Exp $ */
/*************************************************
* Exim - an Internet mail transport agent *
HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
system. Some experimental/developing systems (e.g. GNU/Hurd) may define
RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
- complain if the error is "not supported". */
+ complain if the error is "not supported".
+
+ There are two scenarios where changing the max limit has an effect. In one,
+ the user is using a .forward and invoking a command of their choice via pipe;
+ for these, we do need the max limit to be 0 unless the admin chooses to
+ permit an increased limit. In the other, the command is invoked directly by
+ the transport and is under administrator control, thus being able to raise
+ the limit aids in debugging. So there's no general always-right answer.
+
+ Thus we inhibit core-dumps completely but let individual transports, while
+ still root, re-raise the limits back up to aid debugging. We make the
+ default be no core-dumps -- few enough people can use core dumps in
+ diagnosis that it's reasonable to make them something that has to be explicitly requested.
+ */
#ifdef RLIMIT_CORE
struct rlimit rl;