+gboolean config_key_has_cap(struct sr_dev_driver *driver,
+ const struct sr_dev_inst *sdi, struct sr_channel_group *cg,
+ uint32_t key, uint32_t capability)
+{
+ GVariant *gvar_opts;
+ const uint32_t *opts;
+ gsize num_opts, i;
+ gboolean result;
+
+ if (sr_config_list(driver, sdi, cg, SR_CONF_DEVICE_OPTIONS,
+ &gvar_opts) != SR_OK)
+ return FALSE;
+
+ opts = g_variant_get_fixed_array(gvar_opts, &num_opts, sizeof(uint32_t));
+ result = FALSE;
+ for (i = 0; i < num_opts; i++) {
+ if ((opts[i] & SR_CONF_MASK) == key) {
+ if ((opts[i] & capability) == capability)
+ result = TRUE;
+ else
+ result = FALSE;
+ break;
+ }
+ }
+ g_variant_unref(gvar_opts);
+
+ return result;
+}
+
+int maybe_config_get(struct sr_dev_driver *driver,
+ const struct sr_dev_inst *sdi, struct sr_channel_group *cg,
+ uint32_t key, GVariant **gvar)
+{
+ if (config_key_has_cap(driver, sdi, cg, key, SR_CONF_GET))
+ return sr_config_get(driver, sdi, cg, key, gvar);
+
+ return SR_ERR_NA;
+}
+
+int maybe_config_set(struct sr_dev_driver *driver,
+ const struct sr_dev_inst *sdi, struct sr_channel_group *cg,
+ uint32_t key, GVariant *gvar)
+{
+ if (config_key_has_cap(driver, sdi, cg, key, SR_CONF_SET))
+ return sr_config_set(sdi, cg, key, gvar);
+
+ return SR_ERR_NA;
+}
+
+int maybe_config_list(struct sr_dev_driver *driver,
+ const struct sr_dev_inst *sdi, struct sr_channel_group *cg,
+ uint32_t key, GVariant **gvar)
+{
+ if (config_key_has_cap(driver, sdi, cg, key, SR_CONF_LIST))
+ return sr_config_list(driver, sdi, cg, key, gvar);
+
+ return SR_ERR_NA;
+}
+
+static void get_option(void)
+{
+ struct sr_dev_inst *sdi;
+ struct sr_channel_group *cg;
+ const struct sr_config_info *ci;
+ GSList *devices;
+ GVariant *gvar;
+ GHashTable *devargs;
+ int ret;
+ char *s;
+ struct sr_dev_driver *driver;
+
+ if (!(devices = device_scan())) {
+ g_critical("No devices found.");
+ return;
+ }
+ sdi = devices->data;
+ g_slist_free(devices);
+
+ driver = sr_dev_inst_driver_get(sdi);
+
+ if (sr_dev_open(sdi) != SR_OK) {
+ g_critical("Failed to open device.");
+ return;
+ }
+
+ cg = select_channel_group(sdi);
+ if (!(ci = sr_config_info_name_get(opt_get)))
+ g_critical("Unknown option '%s'", opt_get);
+
+ if ((devargs = parse_generic_arg(opt_config, FALSE)))
+ set_dev_options(sdi, devargs);
+ else devargs = NULL;
+
+ if ((ret = maybe_config_get(driver, sdi, cg, ci->key, &gvar)) != SR_OK)
+ g_critical("Failed to get '%s': %s", opt_get, sr_strerror(ret));
+ s = g_variant_print(gvar, FALSE);
+ printf("%s\n", s);
+ g_free(s);
+
+ g_variant_unref(gvar);
+ sr_dev_close(sdi);
+ if (devargs)
+ g_hash_table_destroy(devargs);
+}
+