--- sysvinit/src/bootlogd.c
+++ sysvinit/src/bootlogd.c
@@ -425,6 +425,7 @@ void writelog(FILE *fp, unsigned char *ptr, int len)
 /*
  *	Print usage message and exit.
  */
+__attribute__((noreturn))
 void usage(void)
 {
 	fprintf(stderr, "Usage: bootlogd [-v] [-r] [-d] [-s] [-c] [-p pidfile] [-l logfile]\n");
--- sysvinit/src/halt.c
+++ sysvinit/src/halt.c
@@ -73,6 +73,7 @@ extern void write_wtmp(char *user, char *id, int pid, int type, char *line);
 /*
  *	Send usage message.
  */
+__attribute__((noreturn))
 void usage(void)
 {
 	fprintf(stderr, "usage: %s [-n] [-w] [-d] [-f] [-h] [-i]%s\n",
--- sysvinit/src/init.c
+++ sysvinit/src/init.c
@@ -2671,6 +2671,7 @@ void init_main(void)
 /*
  * Tell the user about the syntax we expect.
  */
+__attribute__((noreturn))
 static
 void usage(char *s)
 {
@@ -2689,6 +2690,8 @@ int telinit(char *progname, int argc, char **argv)
 	int			f, fd, l;
 	char			*env = NULL;
 
+	if (!argc) usage(progname);
+
 	memset(&request, 0, sizeof(request));
 	request.magic     = INIT_MAGIC;
 
--- sysvinit/src/killall5.c
+++ sysvinit/src/killall5.c
@@ -814,6 +814,7 @@ PIDQ_HEAD *pidof(char *prog)
 }
 
 /* Give usage message and exit. */
+__attribute__((noreturn))
 void usage(void)
 {
 	nsyslog(LOG_ERR, "only one argument, a signal number, allowed");
--- sysvinit/src/last.c
+++ sysvinit/src/last.c
@@ -530,6 +530,7 @@ int list(struct utmp *p, time_t t, int what)
 /*
  *	show usage
  */
+__attribute__((noreturn))
 void usage(char *s)
 {
 	fprintf(stderr, "Usage: %s [-num | -n num] [-f file] "
--- sysvinit/src/mountpoint.c
+++ sysvinit/src/mountpoint.c
@@ -50,6 +50,7 @@ int dostat(char *path, struct stat *st, int do_lstat, int quiet)
 	return 0;
 }
 
+__attribute__((noreturn))
 void usage(void) {
 	fprintf(stderr, "Usage: mountpoint [-q] [-d] [-x] path\n");
 	exit(1);
--- sysvinit/src/shutdown.c
+++ sysvinit/src/shutdown.c
@@ -120,6 +120,7 @@ void stopit(int sig)
 /*
  *	Show usage message.
  */
+__attribute__((noreturn))
 void usage(void)
 {
 	fprintf(stderr,
--- sysvinit/src/sulogin.c
+++ sysvinit/src/sulogin.c
@@ -467,6 +467,7 @@ void sushell(struct passwd *pwd)
 	perror(STATICSH);
 }
 
+__attribute__((noreturn))
 static
 void usage(void)
 {
--- sysvinit/src/utmpdump.c
+++ sysvinit/src/utmpdump.c
@@ -243,6 +243,7 @@ undump(FILE *fp, int forever, int oldfmt)
 	free(linestart);
 }
 
+__attribute__((noreturn))
 void
 usage(int result)
 {