more UBsan

src/kapps/kshell.c

@@ -44,6 +44,7 @@ void pedicel_main(void* arg)
             printf("\r\nYou are currently running the test kernel shell. This is not\r\n"
                         "a fully-fledged shell like you'd find in a complete operating system,\r\n"
                         "but rather a toy to play around in the meantime.\r\n\r\n"
+                            "clear   - clear the screen\r\n"
                             "panic   - trigger a test panic\r\n"
                             "syscall - trigger int 0x80\r\n"
                             "pf      - trigger a page fault\r\n"
@@ -52,6 +53,15 @@ void pedicel_main(void* arg)
             continue;
         }
 
+        if (strncmp(input_buf, "", 1) == 0) {
+            continue;
+        } 
+
+        if (strncmp(input_buf, "clear", 5) == 0) {
+            printf("\x1b[2J\x1b[H");
+            continue;
+        }
+
         if (strncmp(input_buf, "panic", 5) == 0) {
             panic(NULL, "test panic");
         }