+STATIC_LIST(parsers);
+
+static char *local_path(struct discover_context *ctx,
+ struct discover_device *dev,
+ const char *filename)
+{
+ return join_paths(ctx, dev->mount_path, filename);
+}
+
+int parser_request_file(struct discover_context *ctx,
+ struct discover_device *dev, const char *filename,
+ char **buf, int *len)
+
+{
+ char *path;
+ int rc;
+
+ /* we only support local files at present */
+ if (!dev->mount_path)
+ return -1;
+
+ path = local_path(ctx, dev, filename);
+
+ rc = read_file(ctx, path, buf, len);
+
+ talloc_free(path);
+
+ return rc;
+}
+
+int parser_replace_file(struct discover_context *ctx,
+ struct discover_device *dev, const char *filename,
+ char *buf, int len)
+{
+ bool release;
+ char *path;
+ int rc;
+
+ if (!dev->mounted)
+ return -1;
+
+ rc = device_request_write(dev, &release);
+ if (rc) {
+ pb_log("Can't write file %s: device doesn't allow write\n",
+ dev->device_path);
+ return -1;
+ }
+
+ path = local_path(ctx, dev, filename);
+
+ rc = replace_file(path, buf, len);
+
+ talloc_free(path);
+
+ device_release_write(dev, release);
+
+ return rc;
+}
+
+static int download_config(struct discover_context *ctx, char **buf, int *len)
+{
+ struct load_url_result *result;
+ int rc;
+
+ result = load_url(ctx, ctx->conf_url);
+ if (!result)
+ return -1;
+
+ rc = read_file(ctx, result->local, buf, len);
+ if (rc)
+ goto out_clean;
+
+ return 0;
+
+out_clean:
+ if (result->cleanup_local)
+ unlink(result->local);
+ return -1;
+}
+
+static void iterate_parser_files(struct discover_context *ctx,
+ const struct parser *parser)