+ return 1;
+
+ } else if (STR_IN_SET(name, "ReadWriteDirectories", "ReadOnlyDirectories", "InaccessibleDirectories")) {
+
+ _cleanup_strv_free_ char **l = NULL;
+ char ***dirs;
+ char **p;
+
+ r = sd_bus_message_read_strv(message, &l);
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH(p, l) {
+ int offset;
+ if (!utf8_is_valid(*p))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid %s", name);
+
+ offset = **p == '-';
+ if (!path_is_absolute(*p + offset))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid %s", name);
+ }
+
+ if (mode != UNIT_CHECK) {
+ _cleanup_free_ char *joined = NULL;
+
+ if (streq(name, "ReadWriteDirectories"))
+ dirs = &c->read_write_dirs;
+ else if (streq(name, "ReadOnlyDirectories"))
+ dirs = &c->read_only_dirs;
+ else if (streq(name, "InaccessibleDirectories"))
+ dirs = &c->inaccessible_dirs;
+
+ if (strv_length(l) == 0) {
+ *dirs = strv_free(*dirs);
+ unit_write_drop_in_private_format(u, mode, name, "%s=\n", name);
+ } else {
+ r = strv_extend_strv(dirs, l, true);
+
+ if (r < 0)
+ return -ENOMEM;
+
+ joined = strv_join_quoted(*dirs);
+ if (!joined)
+ return -ENOMEM;
+
+ unit_write_drop_in_private_format(u, mode, name, "%s=%s\n", name, joined);
+ }
+
+ }
+
+ return 1;
+
+ } else if (streq(name, "ProtectSystem")) {
+ const char *s;
+ ProtectSystem ps;
+
+ r = sd_bus_message_read(message, "s", &s);