diff -ru sbin/startslip.orig/startslip.c sbin/startslip/startslip.c
--- sbin/startslip.orig/startslip.c	2004-09-22 05:38:09.000000000 -0300
+++ sbin/startslip/startslip.c	2004-10-26 14:42:51.211266633 -0300
@@ -243,7 +243,7 @@
 	if (logged_in) {
 		syslog(LOG_INFO, "%s: connection time elapsed: %ld secs",
 		    username, (long)conn_time);
-		sprintf(buf, "LINE=%d %s %s down",
+		snprintf(buf, sizeof(buf), "LINE=%d %s %s down",
 		diali ? (dialc - 1) % diali : 0,
 		downscript ? downscript : "/sbin/ifconfig" , unitname);
 		(void) system(buf);
@@ -431,7 +431,7 @@
 		syslog(LOG_ERR, "%s: ioctl(SLIOCGUNIT): %m", username);
 		down(2);
 	}
-	sprintf(unitname, "sl%d", unitnum);
+	snprintf(unitname, sizeof(unitname), "sl%d", unitnum);
 
 	if (keepal > 0) {
 		signal(SIGURG, sigurg);
@@ -445,7 +445,7 @@
 		down(2);
 	}
 
-	sprintf(buf, "LINE=%d %s %s up",
+	snprintf(buf, sizeof(buf), "LINE=%d %s %s up",
 		diali ? (dialc - 1) % diali : 0,
 		upscript ? upscript : "/sbin/ifconfig" , unitname);
 	(void) system(buf);