From f07d649783487d2ba11dee8e79de5c017cd8a330 Mon Sep 17 00:00:00 2001
From: deraadt <deraadt@openbsd.org>
Date: Wed, 11 Sep 1996 19:15:28 +0000
Subject: [PATCH] revoke privs at start; tested by fenner@parc.xerox.com

---
 usr.sbin/map-mbone/mapper.c | 13 +++++++------
 usr.sbin/mrinfo/mrinfo.c    | 10 ++++++----
 usr.sbin/mrouted/main.c     |  5 ++---
 usr.sbin/mtrace/mtrace.c    | 10 +++-------
 4 files changed, 18 insertions(+), 20 deletions(-)

diff --git a/usr.sbin/map-mbone/mapper.c b/usr.sbin/map-mbone/mapper.c
index 7a273d01aee..43134c69671 100644
--- a/usr.sbin/map-mbone/mapper.c
+++ b/usr.sbin/map-mbone/mapper.c
@@ -844,13 +844,16 @@ int main(argc, argv)
 {
     int flood = FALSE, graph = FALSE;
     
-    setlinebuf(stderr);
-
     if (geteuid() != 0) {
-	fprintf(stderr, "must be root\n");
-	exit(1);
+      fprintf(stderr, "map-mbone: must be root\n");
+      exit(1);
     }
 
+    init_igmp();
+    setuid(getuid());
+
+    setlinebuf(stderr);
+
     argv++, argc--;
     while (argc > 0 && argv[0][0] == '-') {
 	switch (argv[0][1]) {
@@ -899,8 +902,6 @@ int main(argc, argv)
     if (debug)
 	fprintf(stderr, "Debug level %u\n", debug);
 
-    init_igmp();
-
     {				/* Find a good local address for us. */
 	int udp;
 	struct sockaddr_in addr;
diff --git a/usr.sbin/mrinfo/mrinfo.c b/usr.sbin/mrinfo/mrinfo.c
index e8cfc4f091d..692b5250326 100644
--- a/usr.sbin/mrinfo/mrinfo.c
+++ b/usr.sbin/mrinfo/mrinfo.c
@@ -336,12 +336,16 @@ main(argc, argv)
 	char *host;
 	int curaddr;
 
-	setlinebuf(stderr);
-
 	if (geteuid() != 0) {
 		fprintf(stderr, "mrinfo: must be root\n");
 		exit(1);
 	}
+
+	init_igmp();
+	setuid(getuid());
+
+	setlinebuf(stderr);
+
 	argv++, argc--;
 	while (argc > 0 && argv[0][0] == '-') {
 		switch (argv[0][1]) {
@@ -389,8 +393,6 @@ main(argc, argv)
 	if (debug)
 		fprintf(stderr, "Debug level %u\n", debug);
 
-	init_igmp();
-
 	/* Check all addresses; mrouters often have unreachable interfaces */
 	for (curaddr = 0; hp->h_addr_list[curaddr] != NULL; curaddr++) {
 	    memcpy(&target_addr, hp->h_addr_list[curaddr], hp->h_length);
diff --git a/usr.sbin/mrouted/main.c b/usr.sbin/mrouted/main.c
index 7a3eaff086d..8e3bd4b1cc7 100644
--- a/usr.sbin/mrouted/main.c
+++ b/usr.sbin/mrouted/main.c
@@ -33,7 +33,7 @@
 
 #ifndef lint
 static char rcsid[] =
-	"@(#) $Id: main.c,v 1.3 1995/12/19 17:48:04 deraadt Exp $";
+	"@(#) $Id: main.c,v 1.4 1996/09/11 19:15:33 deraadt Exp $";
 #endif
 
 extern char *configfilename;
@@ -112,12 +112,11 @@ main(argc, argv)
     int index, block;
 #endif
 
-    setlinebuf(stderr);
-
     if (geteuid() != 0) {
 	fprintf(stderr, "must be root\n");
 	exit(1);
     }
+    setlinebuf(stderr);
 
     argv++, argc--;
     while (argc > 0 && *argv[0] == '-') {
diff --git a/usr.sbin/mtrace/mtrace.c b/usr.sbin/mtrace/mtrace.c
index 6f8323ad061..12ee0819ae0 100644
--- a/usr.sbin/mtrace/mtrace.c
+++ b/usr.sbin/mtrace/mtrace.c
@@ -52,7 +52,7 @@
 
 #ifndef lint
 static char rcsid[] =
-    "@(#) $Id: mtrace.c,v 1.2 1995/12/14 01:46:22 deraadt Exp $";
+    "@(#) $Id: mtrace.c,v 1.3 1996/09/11 19:15:36 deraadt Exp $";
 #endif
 
 #include <netdb.h>
@@ -1165,10 +1165,8 @@ char *argv[];
     int waittime;
     int seed;
 
-    if (geteuid() != 0) {
-	fprintf(stderr, "mtrace: must be root\n");
-	exit(1);
-    }
+    init_igmp();
+    setuid(getuid());
 
     argv++, argc--;
     if (argc == 0) goto usage;
@@ -1306,8 +1304,6 @@ Usage: mtrace [-Mlnps] [-w wait] [-m max_hops] [-q nqueries] [-g gateway]\n\
 	exit(1);
     }
 
-    init_igmp();
-
     /*
      * Set useful defaults for as many parameters as possible.
      */
-- 
2.20.1