Now this should be complete

Added basic shell and fixed various bugs...now iceos should be
"complete".

kernel/libc/stdio.c

@@ -32,7 +32,7 @@ int printf(const char *format, ...) {
                     kprint(buf);
                     break;
                 case 'c':
-                    s = va_arg(ap, uint8_t*);
+                    c = (uint8_t)va_arg(ap, uint32_t);
                     kprint_c(&c, 1, WHITE, BLACK);
                     break;
                 case 's':
@@ -49,6 +49,11 @@ int printf(const char *format, ...) {
     return 0;
 }
 
+int printf_color(const char *format, uint8_t fg, uint8_t bg) {
+    kprint_c((uint8_t*)format, strlen((uint8_t*)format), fg, bg);
+    return 0;
+}
+
 void puts(const char *buf) {
     printf("%s\n", buf);
 }

kernel/libc/stdio.h

@@ -14,6 +14,7 @@
 #include <stdarg.h>
 
 int printf(const char *format, ...);
+int printf_color(const char *format, uint8_t fg, uint8_t bg); // Only for string for now
 void puts(const char *buf);
 
 #endif