open_path
rval = open_path(&newname, oflag);
fd = open_path(&f, O_RDWR);
fd = open_path(&f, O_RDONLY);
fd = open_path(&f, O_WRONLY);
fd = open_path(&f, O_WRONLY);
fd = open_path(&f, O_RDWR);
fd = open_path(&f, O_WRONLY);
fd = open_path(&f, O_RDONLY);
fd = open_path(&f, O_RDWR);
fd = open_path(&f, O_RDWR);
fd = open_path(&f, O_WRONLY);
int open_path(pathname_t *, int);