Function vfs_getopt

freebsd/kern/vfs_mount.c:2011–2029

* Get a mount option by its name. * * Return 0 if the option was found, ENOENT otherwise. * If len is non-NULL it will be filled with the length * of the option. If buf is non-NULL, it will be filled * with the address of the option. */

 * with the address of the option.
 */
int
vfs_getopt(struct vfsoptlist *opts, const char *name, void **buf, int *len)
{
	struct vfsopt *opt;

	KASSERT(opts != NULL, ("vfs_getopt: caller passed 'opts' as NULL"));

	TAILQ_FOREACH(opt, opts, link) {
		if (strcmp(name, opt->name) == 0) {
			opt->seen = 1;
			if (len != NULL)
				*len = opt->len;
			if (buf != NULL)
				*buf = opt->value;
			return (0);
		}
	}
	return (ENOENT);
}

int
vfs_getopt_pos(struct vfsoptlist *opts, const char *name)