Index: head/libexec/fingerd/Makefile
===================================================================
--- head/libexec/fingerd/Makefile
+++ head/libexec/fingerd/Makefile
@@ -1,6 +1,8 @@
 #	@(#)Makefile	8.1 (Berkeley) 6/4/93
 # $FreeBSD$
 
+.include <src.opts.mk>
+
 PROG=	fingerd
 LIBADD=	util
 MAN=	fingerd.8
@@ -8,4 +10,10 @@
 WARNS?=	2
 WFORMAT=0
 
+.if ${MK_BLACKLIST_SUPPORT} != "no"
+CFLAGS+= -DUSE_BLACKLIST -I${SRCTOP}/contrib/blacklist/include
+LIBADD+= blacklist
+LDFLAGS+=-L${LIBBLACKLISTDIR}
+.endif
+
 .include <bsd.prog.mk>
Index: head/libexec/fingerd/fingerd.c
===================================================================
--- head/libexec/fingerd/fingerd.c
+++ head/libexec/fingerd/fingerd.c
@@ -57,6 +57,9 @@
 #include <stdlib.h>
 #include <string.h>
 #include "pathnames.h"
+#ifdef USE_BLACKLIST
+#include <blacklist.h>
+#endif
 
 void logerr(const char *, ...) __printflike(1, 2) __dead2;
 
@@ -153,12 +156,18 @@
 		*ap = strtok(lp, " \t\r\n");
 		if (!*ap) {
 			if (secure && ap == &av[4]) {
+#ifdef USE_BLACKLIST
+				blacklist(1, STDIN_FILENO, "nousername");
+#endif
 				puts("must provide username\r\n");
 				exit(1);
 			}
 			break;
 		}
 		if (secure && strchr(*ap, '@')) {
+#ifdef USE_BLACKLIST
+			blacklist(1, STDIN_FILENO, "noforwarding");
+#endif
 			puts("forwarding service denied\r\n");
 			exit(1);
 		}
@@ -197,6 +206,9 @@
 		}
 		dup2(STDOUT_FILENO, STDERR_FILENO);
 
+#ifdef USE_BLACKLIST
+		blacklist(0, STDIN_FILENO, "success");
+#endif
 		execv(prog, comp);
 		write(STDERR_FILENO, prog, strlen(prog));
 #define MSG ": cannot execute\n"