From aa92785a5b76e02f3a9b95a2a90e73760f78698c Mon Sep 17 00:00:00 2001
From: Hans Petter Selasky <hselasky@FreeBSD.org>
Date: Sat, 16 Oct 2021 10:39:18 +0200
Subject: [PATCH] mixer(8): Add -h option to show usage.

Differential Revision:	https://reviews.freebsd.org/D32508
Submitted by:	christos@
Sponsored by:	NVIDIA Networking
---
 usr.sbin/mixer/mixer.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/usr.sbin/mixer/mixer.c b/usr.sbin/mixer/mixer.c
index ba13291f7b36..b95b7502f3f4 100644
--- a/usr.sbin/mixer/mixer.c
+++ b/usr.sbin/mixer/mixer.c
@@ -65,7 +65,7 @@ main(int argc, char *argv[])
 	int aflag = 0, dflag = 0, oflag = 0, sflag = 0;
 	int ch;
 
-	while ((ch = getopt(argc, argv, "ad:f:os")) != -1) {
+	while ((ch = getopt(argc, argv, "ad:f:hos")) != -1) {
 		switch (ch) {
 		case 'a':
 			aflag = 1;
@@ -85,6 +85,7 @@ main(int argc, char *argv[])
 		case 's':
 			sflag = 1;
 			break;
+		case 'h': /* FALLTROUGH */
 		case '?':
 		default:
 			usage();
@@ -175,7 +176,8 @@ static void __dead2
 usage(void)
 {
 	fprintf(stderr, "usage: %1$s [-f device] [-d unit] [-os] [dev[.control[=value]]] ...\n"
-	    "       %1$s [-d unit] [-os] -a\n", getprogname());
+	    "       %1$s [-d unit] [-os] -a\n"
+	    "       %1$s -h\n", getprogname());
 	exit(1);
 }