--- ntp-4.2.4/ntpd/ntpd.c.groups	2006-12-29 00:02:02.000000000 +0100
+++ ntp-4.2.4/ntpd/ntpd.c	2007-01-02 16:24:21.000000000 +0100
@@ -874,10 +874,18 @@
 				sw_uid = (uid_t)strtoul(user, &endp, 0);
 				if (*endp != '\0') 
 					goto getuser;
+
+                                if ((pw = getpwuid(sw_uid)) != NULL) {
+                                        user = strdup(pw->pw_name);
+                                } else {
+					user = (char *)-1;
+                                }
+
 			} else {
 getuser:	
 				if ((pw = getpwnam(user)) != NULL) {
 					sw_uid = pw->pw_uid;
+					sw_gid = pw->pw_gid;
 				} else {
 					errno = 0;
 					msyslog(LOG_ERR, "Cannot find user `%s'", user);
@@ -913,6 +921,13 @@
 				exit (-1);
 			}
 		}
+
+		if (user && (user != (char *)-1) && initgroups(user, sw_gid)) {
+                        msyslog(LOG_ERR, "Cannot initgroups() to user `%s': %m", user);
+                        exit (-1);
+                }
+	
+
 		if (group && setgid(sw_gid)) {
 			msyslog(LOG_ERR, "Cannot setgid() to group `%s': %m", group);
 			exit (-1);