mixer(8): Add -h option to show usage.
Differential Revision: https://reviews.freebsd.org/D32508 Submitted by: christos@ Sponsored by: NVIDIA Networking
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@ -65,7 +65,7 @@ main(int argc, char *argv[])
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int aflag = 0, dflag = 0, oflag = 0, sflag = 0;
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int ch;
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while ((ch = getopt(argc, argv, "ad:f:os")) != -1) {
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while ((ch = getopt(argc, argv, "ad:f:hos")) != -1) {
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switch (ch) {
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case 'a':
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aflag = 1;
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@ -85,6 +85,7 @@ main(int argc, char *argv[])
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case 's':
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sflag = 1;
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break;
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case 'h': /* FALLTROUGH */
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case '?':
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default:
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usage();
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@ -175,7 +176,8 @@ static void __dead2
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usage(void)
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{
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fprintf(stderr, "usage: %1$s [-f device] [-d unit] [-os] [dev[.control[=value]]] ...\n"
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" %1$s [-d unit] [-os] -a\n", getprogname());
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" %1$s [-d unit] [-os] -a\n"
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" %1$s -h\n", getprogname());
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exit(1);
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}
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