1 files changed, 32 insertions, 0 deletions
diff --git a/sway/commands/bar/id.c b/sway/commands/bar/id.c
new file mode 100644
index 00000000..d62a0961
--- /dev/null
+++ b/sway/commands/bar/id.c
@@ -0,0 +1,32 @@
+#include <string.h>
+#include "sway/commands.h"
+#include "log.h"
+
+struct cmd_results *bar_cmd_id(int argc, char **argv) {
+	struct cmd_results *error = NULL;
+	if ((error = checkarg(argc, "id", EXPECTED_EQUAL_TO, 1))) {
+		return error;
+	}
+
+	const char *name = argv[0];
+	const char *oldname = config->current_bar->id;
+
+	// check if id is used by a previously defined bar
+	int i;
+	for (i = 0; i < config->bars->length; ++i) {
+		struct bar_config *find = config->bars->items[i];
+		if (strcmp(name, find->id) == 0 && config->current_bar != find) {
+			return cmd_results_new(CMD_FAILURE, "id",
+					"Id '%s' already defined for another bar. Id unchanged (%s).",
+					name, oldname);
+		}
+	}
+
+	sway_log(L_DEBUG, "Renaming bar: '%s' to '%s'", oldname, name);
+
+	// free old bar id
+	free(config->current_bar->id);
+
+	config->current_bar->id = strdup(name);
+	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}