diff --git a/usr.bin/renice/renice.c b/usr.bin/renice/renice.c
index 37dd913f9b03..5962ed1707e3 100644
--- a/usr.bin/renice/renice.c
+++ b/usr.bin/renice/renice.c
@@ -32,27 +32,37 @@
  */
 
 #ifndef lint
-static char copyright[] =
+static const char copyright[] =
 "@(#) Copyright (c) 1983, 1989, 1993\n\
 	The Regents of the University of California.  All rights reserved.\n";
 #endif /* not lint */
 
 #ifndef lint
+#if 0
 static char sccsid[] = "@(#)renice.c	8.1 (Berkeley) 6/9/93";
+#endif
+static const char rcsid[] =
+	"$Id$";
 #endif /* not lint */
 
 #include <sys/types.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 
+#include <err.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <pwd.h>
 
+int donice __P((int, int, int));
+static void usage __P((void));
+
 /*
  * Change the priority (nice) of processes
  * or groups of processes which are already
  * running.
  */
+int
 main(argc, argv)
 	char **argv;
 {
@@ -60,11 +70,8 @@ main(argc, argv)
 	int who = 0, prio, errs = 0;
 
 	argc--, argv++;
-	if (argc < 2) {
-		fprintf(stderr, "usage: renice priority [ [ -p ] pids ] ");
-		fprintf(stderr, "[ [ -g ] pgrps ] [ [ -u ] users ]\n");
-		exit(1);
-	}
+	if (argc < 2)
+		usage();
 	prio = atoi(*argv);
 	argc--, argv++;
 	if (prio > PRIO_MAX)
@@ -88,16 +95,14 @@ main(argc, argv)
 			register struct passwd *pwd = getpwnam(*argv);
 
 			if (pwd == NULL) {
-				fprintf(stderr, "renice: %s: unknown user\n",
-					*argv);
+				warnx("%s: unknown user", *argv);
 				continue;
 			}
 			who = pwd->pw_uid;
 		} else {
 			who = atoi(*argv);
 			if (who < 0) {
-				fprintf(stderr, "renice: %s: bad value\n",
-					*argv);
+				warnx("%s: bad value", *argv);
 				continue;
 			}
 		}
@@ -106,6 +111,15 @@ main(argc, argv)
 	exit(errs != 0);
 }
 
+static void
+usage()
+{
+	fprintf(stderr,
+"usage: renice priority [ [ -p ] pids ] [ [ -g ] pgrps ] [ [ -u ] users ]\n");
+	exit(1);
+}
+
+int
 donice(which, who, prio)
 	int which, who, prio;
 {
@@ -114,13 +128,11 @@ donice(which, who, prio)
 
 	errno = 0, oldprio = getpriority(which, who);
 	if (oldprio == -1 && errno) {
-		fprintf(stderr, "renice: %d: ", who);
-		perror("getpriority");
+		warn("%d: getpriority", who);
 		return (1);
 	}
 	if (setpriority(which, who, prio) < 0) {
-		fprintf(stderr, "renice: %d: ", who);
-		perror("setpriority");
+		warn("%d: setpriority", who);
 		return (1);
 	}
 	printf("%d: old priority %d, new priority %d\n", who, oldprio, prio);