Index: src/event.c
===================================================================
--- src/event.c	(revision 29101)
+++ src/event.c	(revision 29102)
@@ -73,7 +73,9 @@
 	"pcbev_drc_run",
 	"pcbev_dad_new_dialog",
 	"pcbev_dad_new_geo",
-	"pcbev_net_indicate_short"
+	"pcbev_net_indicate_short",
+	"pcbev_export_session_begin",
+	"pcbev_export_session_end"
 };
 
 typedef struct event_s event_t;
Index: src/event.h
===================================================================
--- src/event.h	(revision 29101)
+++ src/event.h	(revision 29102)
@@ -83,6 +83,9 @@
 
 	PCB_EVENT_NET_INDICATE_SHORT,     /* called by core to get a shortcircuit indicated (e.g. by mincut). Args: (pcb_net_t *net, pcb_any_obj_t *offending_term, pcb_net_t *offending_net, int *handled, int *cancel) - if *handled is non-zero, the short is already indicated; if *cancel is non-zero the whole process is cancelled, no more advanced short checking should take place in this session */
 
+	PCB_EVENT_EXPORT_SESSION_BEGIN,   /* called before an export session (e.g. CAM script execution) starts; should not be nested; there's no guarantee that options are parsed before or after this event */
+	PCB_EVENT_EXPORT_SESSION_END,     /* called after an export session (e.g. CAM script execution) ends */
+
 	PCB_EVENT_last                    /* not a real event */
 } pcb_event_id_t;
 
Index: src/file_act.c
===================================================================
--- src/file_act.c	(revision 29101)
+++ src/file_act.c	(revision 29102)
@@ -510,10 +510,12 @@
 	argc-=2;
 
 	/* call the exporter */
+	pcb_event(PCB_ACT_HIDLIB, PCB_EVENT_EXPORT_SESSION_BEGIN, NULL);
 	a = args;
 	a++;
 	pcb_exporter->parse_arguments(pcb_exporter, &argc, &a);
 	pcb_exporter->do_export(pcb_exporter, NULL);
+	pcb_event(PCB_ACT_HIDLIB, PCB_EVENT_EXPORT_SESSION_END, NULL);
 
 	pcb_exporter = NULL;
 	PCB_ACT_IRES(0);
Index: src/hid_init.c
===================================================================
--- src/hid_init.c	(revision 29101)
+++ src/hid_init.c	(revision 29102)
@@ -667,7 +667,9 @@
 		pcb_message(PCB_MSG_WARNING, "Exporting empty board (nothing loaded or drawn).\n");
 	if (pcb_gui->set_hidlib != NULL)
 		pcb_gui->set_hidlib(pcb_gui, hidlib);
+	pcb_event(hidlib, PCB_EVENT_EXPORT_SESSION_BEGIN, NULL);
 	pcb_gui->do_export(pcb_gui, 0);
+	pcb_event(hidlib, PCB_EVENT_EXPORT_SESSION_END, NULL);
 	pcbhl_log_print_uninit_errs("Exporting");
 	return 1;
 }