feature (shell): implemented basic interactions

ramdisk/shell.c

@@ -1,4 +1,6 @@
 #include "nox/stdio.h"
+#include "nox/memory.h"
+#include "nox/math.h"
 
 #define COMMAND_BUFFER_SIZE 512
 
@@ -26,14 +28,36 @@ int read_command(char* command_buffer)  {
     return pos;
 }
 
+bool handle_command(char* command_buffer) {
+    int command_length = strlen(command_buffer);
+
+    if (command_length < 2) return true;
+
+    if (memcmp(command_buffer, "help", min(4, command_length))) {
+        printf("Commands:\n");
+        printf("    help        | shows this help message\n");
+        printf("    exit        | exit noxsh\n");
+    } else if (memcmp(command_buffer, "exit", min(4, command_length))) {
+        printf("exiting noxsh\n");
+        return false;
+    } else {
+        printf("Unknown command: '");
+        printf(command_buffer);
+        printf("'\n");
+    }
+
+    return true;
+}
+
 void _start() {
     printf("Welcome to the nox shell.\ntype 'help' for a list of commands\n");
 
     bool running = true;
 
     while(running) {
-        printf("\n>>> ");
+        printf("\n[/]=> ");
         char command_buffer[COMMAND_BUFFER_SIZE];
         read_command(command_buffer);
+        running = handle_command(command_buffer);
     }
 }