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Add sysctl/tunable "hw.snd.default_auto", which is useful (especially

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for non-root users) to automatically assign default unit to a newly
attach device like USB audio.
This commit is contained in:
Ariff Abdullah 2007-06-17 16:15:56 +00:00
parent f368584146
commit ad8612b97a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=170885
1 changed files with 6 additions and 1 deletions
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7
sys/dev/sound/pcm/sound.c
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@ -46,6 +46,11 @@ int snd_unit = -1;
TUNABLE_INT("hw.snd.default_unit", &snd_unit);
#endif
static int snd_unit_auto = 0;
TUNABLE_INT("hw.snd.default_auto", &snd_unit_auto);
SYSCTL_INT(_hw_snd, OID_AUTO, default_auto, CTLFLAG_RW,
&snd_unit_auto, 0, "assign default unit to a newly attach device");
int snd_maxautovchans = 16;
/* XXX: a tunable implies that we may need more than one sound channel before
the system can change a sysctl (/etc/sysctl.conf), do we really need
@ -801,7 +806,7 @@ pcm_setstatus(device_t dev, char *str)
pcm_unlock(d);
if (snd_unit < 0)
if (snd_unit < 0 || snd_unit_auto != 0)
snd_unit = device_get_unit(dev);
return (0);