Check for config key availability before using it.

[sigrok-cli.git] / main.c

diff --git a/main.c b/main.c
index d300748bed13b6f863466685454032deac536505..81dc4ad21055a11bfc6f199d1dff732e388eb620 100644 (file)
--- a/main.c
+++ b/main.c
@@ -50,13 +50,15 @@ static void logger(const gchar *log_domain, GLogLevelFlags log_level,
 int select_channels(struct sr_dev_inst *sdi)
 {
        struct sr_channel *ch;
-       GSList *selected_channels, *l;
+       GSList *selected_channels, *l, *channels;
+
+       channels = sr_dev_inst_channels_get(sdi);
 
        if (opt_channels) {
                if (!(selected_channels = parse_channelstring(sdi, opt_channels)))
                        return SR_ERR;
 
-               for (l = sdi->channels; l; l = l->next) {
+               for (l = channels; l; l = l->next) {
                        ch = l->data;
                        if (g_slist_find(selected_channels, ch))
                                ch->enabled = TRUE;
@@ -71,6 +73,52 @@ int select_channels(struct sr_dev_inst *sdi)
        return SR_OK;
 }
 
+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 = sr_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);
+}
+
 static void set_options(void)
 {
        struct sr_dev_inst *sdi;
@@ -162,6 +210,8 @@ int main(int argc, char **argv)
 
        if (opt_version)
                show_version();
+       else if (opt_input_format && opt_show)
+               show_input();
        else if (opt_output_format && opt_show)
                show_output();
        else if (opt_scan_devs)
@@ -174,6 +224,8 @@ int main(int argc, char **argv)
                show_dev_detail();
        else if (opt_input_file)
                load_input_file();
+       else if (opt_get)
+               get_option();
        else if (opt_set)
                set_options();
        else if (opt_samples || opt_time || opt_frames || opt_continuous)