From 7b78ed45aec218a904ae4f5ff995705340dc12ed Mon Sep 17 00:00:00 2001
From: GAMINGNOOBdev <maho.mobilevm@outlook.de>
Date: Tue, 14 Jan 2025 22:17:07 +0100
Subject: [PATCH] Fixed username not showing in in shell+added clear command

---
 source/includes/sh_util.h              |  5 ++--
 source/kernel/C/kernel.c               |  2 +-
 source/kernel/C/shell/commands/login.c | 20 ++++++-------
 source/kernel/C/shell/sh.c             | 40 +++++++++++++++++---------
 4 files changed, 40 insertions(+), 27 deletions(-)

diff --git a/source/includes/sh_util.h b/source/includes/sh_util.h
index 3bbf3ff..a38435d 100644
--- a/source/includes/sh_util.h
+++ b/source/includes/sh_util.h
@@ -12,7 +12,7 @@
 #include <memory2.h>
 #include <graphics.h>
 
-#define BUFFER_SIZE 1024
+#define BUFFER_SIZE 10
 
 typedef struct command_list_entry
 {
@@ -48,5 +48,6 @@ void dispose_command_list(command_list* lst);
  * 
  * @param lst Pointer to command list object
  * @param value Command string (will be copied to a new pointer)
+ * @param length Command string length
  */
-void push_command_to_list(command_list* lst, const char* value);
+void push_command_to_list(command_list* lst, const char* value, size_t length);
diff --git a/source/kernel/C/kernel.c b/source/kernel/C/kernel.c
index 7708c3e..b6cc753 100755
--- a/source/kernel/C/kernel.c
+++ b/source/kernel/C/kernel.c
@@ -413,7 +413,7 @@ void main(void) {
 
         char* username = login_request();
         
-        if(username != ""){
+        if(username != NULL){
             int argc = 1;
             char* dummy_argv[] = {username, null};
             shell_main(argc, dummy_argv);
diff --git a/source/kernel/C/shell/commands/login.c b/source/kernel/C/shell/commands/login.c
index 797c759..94fa56a 100644
--- a/source/kernel/C/shell/commands/login.c
+++ b/source/kernel/C/shell/commands/login.c
@@ -12,8 +12,10 @@
 #include <basics.h>
 
 char* login_request(){
-    char username[21]; // +1 for null terminator
-    char password[21];
+    static char username[21]; // +1 for null terminator
+    static char password[21];
+    memset(username, 0, 21);
+    memset(password, 0, 21);
 
     char temp;
     int i;
@@ -21,8 +23,6 @@ char* login_request(){
     for(int i = 0; i < 30; i++)
         __putc('=');
     __putc('\n');
-    
-    warn("DON'T USE BACKSPACE!!", __FILE__);
 
     print("Username: ");
     i = 0;
@@ -68,11 +68,9 @@ char* login_request(){
 
     __putc('\n');
     
-    if (strcmp(username, "root") == 0 && strcmp(password, "prad") == 0) {
-        memset(username, 0, 21);
-        memset(password, 0, 21);
-        return username; // I know this won't give the username.. need to fix!
-    } else {
-        return "";
-    }
+    if (strcmp(username, "root") == 0 && strcmp(password, "prad") == 0)
+        return &username[0];
+    else
+        return NULL;
+
 }
\ No newline at end of file
diff --git a/source/kernel/C/shell/sh.c b/source/kernel/C/shell/sh.c
index b571d7b..639b8ba 100644
--- a/source/kernel/C/shell/sh.c
+++ b/source/kernel/C/shell/sh.c
@@ -9,6 +9,7 @@
  * 
  */
 
+#include <basics.h>
 #include <sh_util.h>
 #include <memory2.h>
 #include <keyboard.h>
@@ -41,20 +42,21 @@ void dispose_command_list(command_list* lst)
     }
 }
 
-void push_command_to_list(command_list* lst, const char* value)
+void push_command_to_list(command_list* lst, const char* value, size_t length)
 {
-    if (lst == NULL || value == NULL)
+    if (lst == NULL || value == NULL || length == 0)
         return;
 
     command_list_entry* entry = malloc(sizeof(command_list_entry));
-    memset(entry, 0, sizeof(command_list_entry));
+    assert(entry != NULL, __FILE__, __LINE__);
     if (entry == NULL)
         return;
 
-    size_t commandSize = strlen_(value);
-    entry->command = malloc(commandSize+1);
-    memset(entry->command, 0, commandSize+1);
-    memcpy(entry->command, value, commandSize);
+    memset(entry, 0, sizeof(command_list_entry));
+    entry->length = length;
+    entry->command = malloc(length+1);
+    memset(entry->command, 0, length+1);
+    memcpy(entry->command, value, length);
 
     if (lst->start == NULL)
     {
@@ -98,13 +100,16 @@ int shell_main(int argc, char** argv){
 
     print("\x1b[2J\x1b[H");
     welcome_message();
+
+    command_list commandHistory;
+    init_command_list(&commandHistory);
     
     putc('\n');
     print(argv[0]);
-    putc(' ');
-    putc('%');
-    putc(' ');
+    print(" % ");
 
+    uint8_t commandPulledFromHistory = 0;
+    command_list_entry* entry = NULL;
     char c;
     while (running)
     {
@@ -118,15 +123,14 @@ int shell_main(int argc, char** argv){
             command[cursor] = '\0'; // Null-terminate the string
             putc('\n');
             execute(command, argc, argv);
+            // push_command_to_list(&commandHistory, command, cursor); // <-- doesn't work because of malloc i assume
             cursor = 0;
             commandSize = 0;
             memset(command, 0, commandBufferSize);
 
             if(running){
                 print(argv[0]);
-                putc(' ');
-                putc('%');
-                putc(' ');
+                print(" % ");
             }
             continue;
         }
@@ -134,6 +138,7 @@ int shell_main(int argc, char** argv){
         {
             if (cursor > 0)
                 cursor--;
+            else continue;
         }
         else
         {
@@ -152,14 +157,23 @@ int shell_main(int argc, char** argv){
     }
     free(command);
 
+    dispose_command_list(&commandHistory);
+
     return 0;
 }
 
 void execute(const char* buffer, int argc, char** argv)
 {
+    if (buffer == NULL)
+        return;
+    if (strlen_(buffer) == 0)
+        return;
+
     if(strcmp(buffer, "exit") == 0){
         print("\x1b[2J\x1b[H");
         running = false;
+    } else if(strcmp(buffer, "clear") == 0){
+        print("\x1b[2J\x1b[H");
     } else if(strcmp(buffer, "shutdown") == 0){
         info("Goodbye from Frosted Shell...", __FILE__);
         shutdown();