static int
dodefault(const char *propname, int intsz, int numints, void *buf)
{
zfs_prop_t prop;
/*
* The setonce properties are read-only, BUT they still
* have a default value that can be used as the initial
* value.
*/
if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL ||
(zfs_prop_readonly(prop) && !zfs_prop_setonce(prop)))
return (SET_ERROR(ENOENT));
if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) {
if (intsz != 1)
return (SET_ERROR(EOVERFLOW));
(void) strncpy(buf, zfs_prop_default_string(prop),
numints);
} else {
if (intsz != 8 || numints < 1)
return (SET_ERROR(EOVERFLOW));
*(uint64_t *)buf = zfs_prop_default_numeric(prop);
}
return (0);
}
/*
* Determines the source of a property given its setpoint and
* property type. It pushes the source to the lua stack.
*/
static void
get_prop_src(lua_State *state, const char *setpoint, zfs_prop_t prop)
{
if (zfs_prop_readonly(prop) || (prop == ZFS_PROP_VERSION)) {
lua_pushnil(state);
} else {
const char *src;
if (strcmp("", setpoint) == 0) {
src = "default";
} else {
src = setpoint;
}
(void) lua_pushstring(state, src);
}
}