ufs_open
error = ufs_open(_ascii_filename, _f);
ufs_open, ufs_close, ufs_read, ufs_write, ufs_seek, ufs_stat
ufs_open, ufs_close, ufs_read, ufs_write, ufs_seek, ufs_stat
{ &vop_open_desc, ufs_open }, /* open */
int ufs_open(void *);