diff --git a/sbin/mknod/mknod.c b/sbin/mknod/mknod.c
index b5851bfc75f3..47c178ae439c 100644
--- a/sbin/mknod/mknod.c
+++ b/sbin/mknod/mknod.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: mknod.c,v 1.9 1997/09/15 03:46:31 lukem Exp $	*/
+/*	$NetBSD: mknod.c,v 1.10 1997/11/05 21:29:29 cgd Exp $	*/
 
 /*
  * Copyright (c) 1989, 1993
@@ -46,7 +46,7 @@ __COPYRIGHT("@(#) Copyright (c) 1989, 1993\n\
 #if 0
 static char sccsid[] = "@(#)mknod.c	8.1 (Berkeley) 6/5/93";
 #else
-__RCSID("$NetBSD: mknod.c,v 1.9 1997/09/15 03:46:31 lukem Exp $");
+__RCSID("$NetBSD: mknod.c,v 1.10 1997/11/05 21:29:29 cgd Exp $");
 #endif
 #endif /* not lint */
 
@@ -88,11 +88,13 @@ main(argc, argv)
 	}
 
 	exit(0);
+	/* NOTREACHED */
 }
 
 void
 usage()
 {
-	fprintf(stderr, "usage: mknod name [b | c] major minor\n");
+	(void)fprintf(stderr, "usage: mknod name [b | c] major minor\n");
 	exit(1);
+	/* NOTREACHED */
 }
diff --git a/sbin/mount/mount.c b/sbin/mount/mount.c
index 160a6e84a908..5ce9da23385b 100644
--- a/sbin/mount/mount.c
+++ b/sbin/mount/mount.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: mount.c,v 1.39 1997/11/01 18:38:29 drochner Exp $	*/
+/*	$NetBSD: mount.c,v 1.40 1997/11/05 21:29:33 cgd Exp $	*/
 
 /*
  * Copyright (c) 1980, 1989, 1993, 1994
@@ -43,7 +43,7 @@ __COPYRIGHT("@(#) Copyright (c) 1980, 1989, 1993, 1994\n\
 #if 0
 static char sccsid[] = "@(#)mount.c	8.25 (Berkeley) 5/8/95";
 #else
-__RCSID("$NetBSD: mount.c,v 1.39 1997/11/01 18:38:29 drochner Exp $");
+__RCSID("$NetBSD: mount.c,v 1.40 1997/11/05 21:29:33 cgd Exp $");
 #endif
 #endif /* not lint */
 
@@ -106,7 +106,7 @@ static struct opt {
 	{ 0 }
 };
 
-static char ffs[] = "ffs";
+static char ffs_fstype[] = "ffs";
 
 int
 main(argc, argv)
@@ -123,7 +123,7 @@ main(argc, argv)
 	all = forceall = init_flags = 0;
 	options = NULL;
 	vfslist = NULL;
-	vfstype = ffs;
+	vfstype = ffs_fstype;
 	while ((ch = getopt(argc, argv, "Aadfo:rwt:uv")) != -1)
 		switch (ch) {
 		case 'A':
@@ -199,9 +199,12 @@ main(argc, argv)
 			}
 		}
 		exit(rval);
+		/* NOTREACHED */
 	case 1:
-		if (vfslist != NULL)
+		if (vfslist != NULL) {
 			usage();
+			/* NOTREACHED */
+		}
 
 		if (init_flags & MNT_UPDATE) {
 			if ((mntbuf = getmntpt(*argv)) == NULL)
@@ -261,6 +264,7 @@ main(argc, argv)
 	}
 
 	exit(rval);
+	/* NOTREACHED */
 }
 
 int
@@ -359,7 +363,7 @@ mountfs(vfstype, spec, name, flags, options, mntopts, skipmounted)
 	if (flags & MNT_UPDATE) {
 		catopt(&optbuf, "update");
 		/* Figure out the fstype only if we defaulted to ffs */
-		if (vfstype == ffs && statfs(name, &sf) != -1)
+		if (vfstype == ffs_fstype && statfs(name, &sf) != -1)
 			vfstype = sf.f_fstypename;
 	}
 
@@ -398,7 +402,7 @@ mountfs(vfstype, spec, name, flags, options, mntopts, skipmounted)
 		do {
 			(void)snprintf(execname,
 			    sizeof(execname), "%s/%s", *edir, execbase);
-			execv(execname, (char * const *)argv);
+			(void)execv(execname, (char * const *)argv);
 			if (errno != ENOENT)
 				warn("exec %s for %s", execname, name);
 		} while (*++edir != NULL);
@@ -555,4 +559,5 @@ usage()
 		"[-adfruvw] [-t ffs | external_type]",
 		"[-dfruvw] special | node");
 	exit(1);
+	/* NOTREACHED */
 }
diff --git a/sbin/ping/ping.c b/sbin/ping/ping.c
index 570d6e159f13..249d6f477db5 100644
--- a/sbin/ping/ping.c
+++ b/sbin/ping/ping.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ping.c,v 1.32 1997/09/15 07:21:12 lukem Exp $	*/
+/*	$NetBSD: ping.c,v 1.33 1997/11/05 21:29:36 cgd Exp $	*/
 
 /*
  * Copyright (c) 1989, 1993
@@ -61,7 +61,7 @@
 
 #include <sys/cdefs.h>
 #ifndef lint
-__RCSID("$NetBSD: ping.c,v 1.32 1997/09/15 07:21:12 lukem Exp $");
+__RCSID("$NetBSD: ping.c,v 1.33 1997/11/05 21:29:36 cgd Exp $");
 #endif
 
 #include <stdio.h>
@@ -234,7 +234,7 @@ main(int argc, char *argv[])
 	if (tcgetattr (0, &ts) != -1) {
 		reset_kerninfo = !(ts.c_lflag & NOKERNINFO);
 		ts.c_lflag |= NOKERNINFO;
-		tcsetattr (0, TCSANOW, &ts);
+		(void)tcsetattr(0, TCSANOW, &ts);
 	}
 #endif
 	while ((c = getopt(argc, argv,
@@ -1126,7 +1126,7 @@ prefinish(int s)
 	    || nreceived == 0)		/* or if remote is dead */
 		finish(0);
 
-	signal(s, finish);		/* do this only the 1st time */
+	(void)signal(s, finish);	/* do this only the 1st time */
 
 	if (npackets > ntransmitted)	/* let the normal limit work */
 		npackets = ntransmitted;
@@ -1145,7 +1145,7 @@ finish(int s)
 
 	if (reset_kerninfo && tcgetattr (0, &ts) != -1) {
 		ts.c_lflag &= ~NOKERNINFO;
-		tcsetattr (0, TCSANOW, &ts);
+		(void)tcsetattr(0, TCSANOW, &ts);
 	}
 	(void)signal(SIGINFO, SIG_IGN);
 #else
@@ -1584,7 +1584,7 @@ gethost(const char *arg,
 {
 	struct hostent *hp;
 
-	memset(sa, 0, sizeof(*sa));
+	(void)memset(sa, 0, sizeof(*sa));
 	sa->sin_family = AF_INET;
 
 	/* If it is an IP address, try to convert it to a name to
@@ -1612,7 +1612,7 @@ gethost(const char *arg,
 	if (hp->h_addrtype != AF_INET)
 		errx(1, "%s only supported with IP", arg);
 
-	memmove(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr));
+	(void)memmove(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr));
 
 	if (realname) {
 		(void)strncpy(realname, hp->h_name, realname_len);