Execute blocks asynchronously

config.h

@@ -1,7 +1,15 @@
 #define CMDLENGTH 50
-#define delimiter "  "
+#define DELIMITER "  "
 
-const Block blocks[] = {
+typedef struct {
+	char* command;
+	unsigned int interval;
+	unsigned int signal;
+	char output[CMDLENGTH];
+	int pipe[2];
+} Block;
+
+static Block blocks[] = {
 	{"sb-mail", 1800, 1},
 	{"sb-music", 0, 2},
 	{"sb-disk", 1800, 4},
@@ -10,5 +18,4 @@ const Block blocks[] = {
 	{"sb-volume", 0, 5},
 	{"sb-battery", 5, 6},
 	{"sb-date", 20, 7},
-	{"sb-network", 5, 8},
-};
+	{"sb-network", 5, 8}};