oss_audioinfo
oss_audioinfo *tmpai;
tmpai = (struct oss_audioinfo*)argp;
#define SNDCTL_AUDIOINFO _IOWR ('X',7, oss_audioinfo)
#define SNDCTL_ENGINEINFO _IOWR ('X',12, oss_audioinfo)
#define SNDCTL_AUDIOINFO_EX _IOWR ('X',13, oss_audioinfo)