Move stuff to include/ and src/

src/util.c

@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+#include "i3.h"
+
+/*
+ * Starts the given application with the given args.
+ *
+ */
+void start_application(const char *path, const char *args) {
+	pid_t pid;
+	if ((pid = vfork()) == 0) {
+		/* This is the child */
+		char *argv[2];
+		/* TODO: For now, we ignore args. Later on, they should be parsed
+		   correctly (like in the shell?) */
+		argv[0] = strdup(path);
+		argv[1] = NULL;
+		execve(path, argv, environment);
+		/* not reached */
+	}
+}
+
+/*
+ * Checks a generic cookie for errors and quits with the given message if there
+ * was an error.
+ *
+ */
+void check_error(xcb_connection_t *connection, xcb_void_cookie_t cookie, char *err_message) {
+	xcb_generic_error_t *error = xcb_request_check(connection, cookie);
+	if (error != NULL) {
+		fprintf(stderr, "ERROR: %s : %d\n", err_message , error->error_code);
+		xcb_disconnect(connection);
+		exit(-1);
+	}
+}