From the fedora core SRPM. Outputs error message and exists if the
command is not suid root or run as user root. 

--- iputils/traceroute6.c.old	2004-12-07 11:08:57.000000000 +0100
+++ iputils/traceroute6.c	2004-12-07 11:14:09.397575536 +0100
@@ -352,8 +352,11 @@
 	icmp_sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
 	socket_errno = errno;
 
-	setuid(getuid());
-
+	if(setuid(getuid()) != 0)
+	{
+		perror("traceroute: setuid()");
+		exit(-1);
+	}
 	on = 1;
 	seq = tos = 0;
 	to = (struct sockaddr_in6 *)&whereto;
--- iputils/ping6.c.old	2004-12-07 11:08:57.000000000 +0100
+++ iputils/ping6.c	2004-12-07 11:13:40.707937024 +0100
@@ -223,7 +223,11 @@
 	socket_errno = errno;
 
 	uid = getuid();
-	setuid(uid);
+	if(setuid(uid) != 0)
+	{
+		perror("ping: setuid()");
+		exit(-1);
+	}
 
 	source.sin6_family = AF_INET6;
 	memset(&firsthop, 0, sizeof(firsthop));
--- iputils/ping.c.old	2004-12-07 11:08:57.000000000 +0100
+++ iputils/ping.c	2004-12-07 11:13:27.523941296 +0100
@@ -119,7 +119,11 @@
 	socket_errno = errno;
 
 	uid = getuid();
-	setuid(uid);
+	if(setuid(uid) != 0)
+	{
+		perror("ping: setuid()");
+		exit(-1);
+	}
 
 	source.sin_family = AF_INET;