+ if (zip_stat(archive, "metadata", 0, &zs) == -1)
+ return SR_ERR;
+
+ metafile = g_malloc(zs.size);
+ zf = zip_fopen_index(archive, zs.index, 0);
+ zip_fread(zf, metafile, zs.size);
+ zip_fclose(zf);
+
+ /*
+ * If the file was only initialized but doesn't yet have any
+ * data it in, it won't have a unitsize field in metadata yet.
+ */
+ error = NULL;
+ kf = g_key_file_new();
+ if (!g_key_file_load_from_data(kf, metafile, zs.size, 0, &error)) {
+ sr_err("Failed to parse metadata: %s.", error->message);
+ return SR_ERR;
+ }
+ g_free(metafile);
+ tmpname[0] = '\0';
+ if (!g_key_file_has_key(kf, "device 1", "unitsize", &error)) {
+ if (error && error->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND) {
+ sr_err("Failed to check unitsize key: %s", error ? error->message : "?");
+ return SR_ERR;
+ }
+ /* Add unitsize field. */
+ g_key_file_set_integer(kf, "device 1", "unitsize", unitsize);
+ metafile = g_key_file_to_data(kf, &len, &error);
+ strcpy(tmpname, "sigrok-meta-XXXXXX");
+ if ((tmpfile = g_mkstemp(tmpname)) == -1)
+ return SR_ERR;
+ if (write(tmpfile, metafile, len) < 0) {
+ sr_dbg("Failed to create new metadata: %s", strerror(errno));
+ g_free(metafile);
+ unlink(tmpname);
+ return SR_ERR;
+ }
+ close(tmpfile);
+ if (!(metasrc = zip_source_file(archive, tmpname, 0, -1))) {
+ sr_err("Failed to create zip source for metadata.");
+ g_free(metafile);
+ unlink(tmpname);
+ return SR_ERR;
+ }
+ if (zip_replace(archive, zs.index, metasrc) == -1) {
+ sr_err("Failed to replace metadata file.");
+ g_free(metafile);
+ unlink(tmpname);
+ return SR_ERR;
+ }
+ g_free(metafile);
+ }
+ g_key_file_free(kf);
+