sound: implement OSS_GETVERSION.

It's required by some software, emulators/qemu to mention. Obtained-from: FreeBSD
randy1 · Apr 17, 2010 · 2f1b68b · 2f1b68b
1 parent aedbaf3
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diff --git a/sys/dev/sound/pcm/mixer.c b/sys/dev/sound/pcm/mixer.c
@@ -683,6 +683,12 @@ mixer_ioctl(struct dev_ioctl_args *ap)
 		return EBADF;
 	}
 
+	if (cmd == OSS_GETVERSION) {
+		arg = SOUND_VERSION;
+		snd_mtxunlock(m->lock);
+		return 0;
+	}
+
 	if ((cmd & MIXER_WRITE(0)) == MIXER_WRITE(0)) {
 		if (j == SOUND_MIXER_RECSRC)
 			ret = mixer_setrecsrc(m, *arg_i);

diff --git a/sys/sys/soundcard.h b/sys/sys/soundcard.h
@@ -1092,6 +1092,9 @@ typedef struct mixer_info {
 
 #define SOUND_MIXER_INFO		_IOR('M', 101, mixer_info)
 
+/* Some apps require this */
+#define OSS_GETVERSION			_IOR ('M', 118, int)
+
 #define LEFT_CHN	0
 #define RIGHT_CHN	1