rdopen
if (rdopen(dev, FREAD | FWRITE, S_IFBLK, NULL))
static dev_type_open(rdopen);
.d_open = rdopen,
.d_open = rdopen,
{ "rd", rdstrategy, rdopen, rdclose, rdioctl }, /*2*/
int rdopen(struct open_file *, ...);
static dev_type_open(rdopen);
.d_open = rdopen,
.d_open = rdopen,
if (rdopen(dev, FREAD | FWRITE, S_IFBLK, NULL))
dev_type_open(rdopen);
.d_open = rdopen,
.d_open = rdopen,