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mixer(8): Add -h option to show usage.

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Differential Revision:	https://reviews.freebsd.org/D32508
Submitted by:	christos@
Sponsored by:	NVIDIA Networking
This commit is contained in:
Hans Petter Selasky 2021-10-16 10:39:18 +02:00
parent 899a3b38f5
commit aa92785a5b
1 changed files with 4 additions and 2 deletions
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6
usr.sbin/mixer/mixer.c
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@ -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);
}