almost got the term emu working and shell

programs/rocksh/main.c

@@ -1,46 +1,13 @@
-#include <string.h>
-#include <stdio.h>
 #include <unistd.h>
+#include <stdio.h>
 
 const char* shell_prompt = "rocksh> ";
 
-static void process_cmd(const char* cmd) {
-    size_t cmd_len = strlen(cmd);
-    if (cmd_len < 1) {
-        return;
-    }
-
-    if (strcmp(cmd, "exit") == 0) {
-        printf("bye!\n");
-        exit(0);
-    }
-
-    printf("command not recognized: %s\n", cmd);
-}
-
 int main(int argc, char *argv[]) {
     (void)argc;
     (void)argv;
 
-    char cmd[128];
-    size_t p = 0;
-    
-    printf("%s", shell_prompt);
+    printf(shell_prompt);
 
-    while (1) {
-        char c = getchar();
-        printf("%c", c);
-        if (c != '\n') {
-            cmd[p++] = c;
-            continue;
-        }
-
-        cmd[p] = 0;
-        process_cmd(cmd);
-        memset(cmd, 0, 128);
-        p = 0;
-        printf("%s", shell_prompt);
-    }
-    
-    return 0;
+    return 3;
 }