Notify devd(8) when a process crashed.

This change implements a notification (via devctl) to userland when
the kernel produces coredumps after a process has crashed.
devd can then run a specific command to produce a human readable crash
report.  The command is most usually a helper that runs gdb/lldb
commands on the file/coredump pair.  It's possible to use this
functionality for implementing automatic generation of crash reports.

devd(8) will be notified of the full path of the binary that crashed and
the full path of the coredump file.

1 files changed, 12 insertions, 0 deletions

diff --git a/etc/devd.conf b/etc/devd.conf
index 4120c63..7a033a7 100644
--- a/etc/devd.conf
+++ b/etc/devd.conf
@@ -325,4 +325,16 @@ notify 100 {
 	action "/usr/sbin/automount -c";
 };
 
+# Handle userland coredumps.
+# This commented out handler makes it possible to run an
+# automated debugging session after the core dump is generated.
+# Replace action with a proper coredump handler, but be aware that
+# it will run with elevated privileges.
+notify 10 {
+	match "system"          "kernel";
+	match "subsystem"       "signal";
+	match "type"            "coredump";
+	action "logger $comm $core";
+};
+
 */