opendisk1
int opendisk1(const char *, int, char *, size_t, int,
fd = opendisk1(*argv, O_RDWR, buf, sizeof(buf), 1, prog_open);
fd = opendisk1(*argv, O_RDWR, cgdname, sizeof(cgdname), 1, prog_open)
fd = opendisk1(cgd, O_RDWR, buf, buflen, 0, prog_open);
fd = opendisk1(name, openmode, dev_name, sizeof(dev_name), 0,
fd = opendisk1(argv[0], O_RDWR, full, sizeof(full), 0, prog_open);
fd = opendisk1(argv[0], O_RDWR, full, sizeof(full), 0, prog_open);
fd = opendisk1(dev, O_RDONLY, full, sizeof(full), 0, prog_open);