feature (shell): started work on a basic shell

ramdisk/shell.c

@@ -0,0 +1,39 @@
+#include "nox/stdio.h"
+
+#define COMMAND_BUFFER_SIZE 512
+
+int read_command(char* command_buffer)  {
+    char chr = 0;
+    int  pos = 0;
+    while (chr != '\n') {
+        chr = getc();
+        switch (chr) {
+            case '\b': {
+                if (pos > 0) pos--;
+                break;
+            }
+            default: {
+                if (pos < COMMAND_BUFFER_SIZE) {
+                    command_buffer[pos] = chr;
+                    pos++;
+                }
+                break;
+            }
+        }
+    }
+
+    command_buffer[pos] = '\0';
+    return pos;
+}
+
+void _start() {
+    printf("Welcome to the nox shell.\ntype 'help' for a list of commands\n");
+
+    bool running = true;
+
+    while(running) {
+        printf("\n>>> ");
+        char command_buffer[COMMAND_BUFFER_SIZE];
+        read_command(command_buffer);
+    }
+}