File report-iface.patch of Package arpwatch

Index: arpwatch-3.1/arpsnmp.c
===================================================================
--- arpwatch-3.1.orig/arpsnmp.c
+++ arpwatch-3.1/arpsnmp.c
@@ -77,6 +77,7 @@ void	usage(void) __attribute__((noreturn
 
 /* Globals */
 char *prog;
+char *interface;
 int quiet;
 int suppress;
 const char *watcher = WATCHER;
Index: arpwatch-3.1/arpwatch.c
===================================================================
--- arpwatch-3.1.orig/arpwatch.c
+++ arpwatch-3.1/arpwatch.c
@@ -123,6 +123,7 @@ struct rtentry;
 
 /* Globals */
 char *prog;
+char *interface;
 int quiet;
 int suppress;
 const char *watcher = WATCHER;
@@ -244,7 +245,7 @@ main(int argc, char **argv)
 	pcap_t *pd;
 	FILE *fp;
 	pcap_if_t *alldevs;
-	char *interface, *rfilename;
+	char *rfilename;
 	struct bpf_program code;
 	char errbuf[PCAP_ERRBUF_SIZE];
 	char *serveruser = NULL;
Index: arpwatch-3.1/report.c
===================================================================
--- arpwatch-3.1.orig/report.c
+++ arpwatch-3.1/report.c
@@ -78,6 +78,8 @@ struct rtentry;
 
 #define PLURAL(n) ((n) == 1 || (n) == -1 ? "" : "s")
 
+extern char *interface;
+
 static int cdepth;	/* number of outstanding children */
 
 static char *fmtdate(time_t);
@@ -354,6 +356,8 @@ report(const char *title, u_int32_t a, c
 		(void)fprintf(f, fmt, "previous timestamp", fmtdate(*t2p));
 	if (t1p && t2p && *t1p && *t2p)
 		(void)fprintf(f, fmt, "delta", fmtdelta(*t1p - *t2p));
+	if (interface)
+		(void)fprintf(f, fmt, "interface", interface);
 
 	if (debug) {
 		fflush(f);