Ensure cursor is not showing when running

Makefile

@@ -30,6 +30,8 @@ $(BUILD_DIR):
 	mkdir -p $(BUILD_DIR)
 
 run: $(BIN)
+	# NOTE: This should probably be done on the C code.
+	echo 0 > /sys/class/graphics/fbcon/cursor_blink
 	./$(BIN)
 
 clean:

src/main.c

@@ -2,6 +2,7 @@
 #include<stdlib.h>
 #include<stdint.h>
 #include<stdbool.h>
+#include<unistd.h>
 #include<fcntl.h>
 #include<linux/fb.h>
 #include<sys/ioctl.h>
@@ -30,14 +31,31 @@ main(void) {
 		fprintf(stderr, "couldn't mmap the framebuffer\n");
 		exit(EXIT_FAILURE);
 	}
+
+	// Main loop.
 	uint8_t shade = 0;
+	size_t counter = 0;
+	size_t direction = 1;
 	while (true) {
 		for (size_t j = 0; j < height; j++) {
 			for (size_t i = 0; i < width; i++) {
 				buf[j * width + i] = shade;
 			}
 		}
-		shade++;
+		counter++;
+		if (counter > 10) {
+			shade += direction;
+			counter = 0;
 		}
+		if (shade == 0xFF) {
+			direction = -1;
+		} else if (shade == 0x00) {
+			direction = 1;
+		}
+	}
+
+	// Cleanup.
+	munmap(buf, len);
+	close(fb);
 	return 0;
 }