$NetBSD: patch-bf,v 1.1 2009/05/09 16:33:04 adrianp Exp $

diff -ur dsniff-2.3.orig/mailsnarf.c dsniff-2.3/mailsnarf.c
--- mailsnarf.c.orig	2000-11-19 19:39:41.000000000 +0000
+++ mailsnarf.c	2009-05-06 23:23:49.000000000 +0100
@@ -57,7 +57,7 @@
 usage(void)
 {
 	fprintf(stderr, "Version: " VERSION "\n"
-		"Usage: mailsnarf [-i interface] [[-v] pattern [expression]]\n");
+		"Usage: mailsnarf [-i interface | -p pcapfile] [[-v] pattern [expression]]\n");
 	exit(1);
 }
 
@@ -340,11 +340,14 @@
 {
 	int c;
 	
-	while ((c = getopt(argc, argv, "i:vh?V")) != -1) {
+	while ((c = getopt(argc, argv, "i:p:vh?V")) != -1) {
 		switch (c) {
 		case 'i':
 			nids_params.device = optarg;
 			break;
+                case 'p':
+                        nids_params.filename = optarg;
+                        break;
 		case 'v':
 			Opt_invert = 1;
 			break;
@@ -374,10 +377,23 @@
 	nids_register_tcp(sniff_pop_session);
 
 	if (nids_params.pcap_filter != NULL) {
-		warnx("listening on %s [%s]", nids_params.device,
-		      nids_params.pcap_filter);
-	}
-	else warnx("listening on %s", nids_params.device);
+                if (nids_params.filename == NULL) {
+		        warnx("listening on %s [%s]", nids_params.device,
+		              nids_params.pcap_filter);
+                }
+                else {
+		        warnx("using %s [%s]", nids_params.filename,
+		              nids_params.pcap_filter);
+                }
+	}
+	else {
+                if (nids_params.filename == NULL) {
+                    warnx("listening on %s", nids_params.device);
+                }
+                else {
+                    warnx("using %s", nids_params.filename);
+                }
+        }
 	
 	nids_run();