Added keyboard_indicators (Fixes #31)

README.md

@@ -18,6 +18,7 @@ The following information is included:
 - Hostname
 - IP addresses
 - Kernel version
+- Keyboard indicators
 - Load averages
 - Memory status (free memory, percentage, total memory and used memory)
 - Swap status (free swap, percentage, total swap and used swap)

config.def.h

@@ -20,6 +20,7 @@
 - hostname [argument: NULL]
 - ip (ip address) [argument: interface]
 - kernel_release (uname -r) [argument: NULL]
+- keyboard_indicators (caps/num lock indicators) [agrument: NULL]
 - load_avg (load average) [argument: NULL]
 - ram_free (free ram in GB) [argument: NULL]
 - ram_perc (ram usage in percent) [argument: NULL]

slstatus.c

@@ -47,6 +47,7 @@ static char *gid(void);
 static char *hostname(void);
 static char *ip(const char *iface);
 static char *kernel_release(void);
+static char *keyboard_indicators(void);
 static char *load_avg(void);
 static char *ram_free(void);
 static char *ram_perc(void);
@@ -322,6 +323,30 @@ kernel_release(void)
 	return smprintf("%s", udata.release);
 }
 
+static char *
+keyboard_indicators(void)
+{
+	Display *dpy = XOpenDisplay(NULL);
+	XKeyboardState state;
+	XGetKeyboardControl(dpy, &state);
+
+	switch (state.led_mask) {
+		case 1:
+			return smprintf("c");
+			break;
+		case 2:
+			return smprintf("n");
+			break;
+		case 3:
+			return smprintf("cn");
+			break;
+		default:
+			return smprintf("");
+	}
+
+	XCloseDisplay(dpy);
+}
+
 static char *
 load_avg(void)
 {