From 359e5c6d78d1a681dcd345af74ad46a84f0515f3 Mon Sep 17 00:00:00 2001
From: Ruslan Isaev <ubijca16@gmail.com>
Date: Wed, 16 Jul 2025 15:42:35 +0300
Subject: [PATCH] syscalls: add chdir and getcwd syscalls, not tested yet

---
 include/task.h         |  1 +
 src/tasking/syscalls.c | 25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/include/task.h b/include/task.h
index 062872e..8fdb46d 100644
--- a/include/task.h
+++ b/include/task.h
@@ -65,6 +65,7 @@ typedef struct Process
     struct Process* next;      // Следующий процесс
 
     file_t* file_descriptors[MAX_OPEN_FILES];
+    dir_t* cwd;
 } Process;
 
 extern Process* current;
diff --git a/src/tasking/syscalls.c b/src/tasking/syscalls.c
index f114a1b..b8998d8 100644
--- a/src/tasking/syscalls.c
+++ b/src/tasking/syscalls.c
@@ -230,6 +230,22 @@ int sys_close(TrapFrame *tf)
     return -1;
 }
 
+int sys_chdir(TrapFrame *tf)
+{
+    return fat_opendir(current->cwd, (const char*)tf->ebx);
+}
+
+int sys_getcwd(TrapFrame *tf)
+{
+    int len = tf->ecx;
+
+    if(len >= 260)
+        return (int)NULL;
+
+    memcpy((void*)tf->ebx, current->cwd->fat->name, current->cwd->fat->namelen);
+    return tf->ebx;
+}
+
 int sys_getpid(TrapFrame *tf)
 {
     return current->pid;
@@ -268,9 +284,18 @@ void handle_syscall(TrapFrame *tf)
             tf->eax = sys_close(tf);
             break;
         
+        case 12://chdir
+            tf->eax = sys_chdir(tf);
+            break;
+        
         case 20://getpid
             tf->eax = sys_getpid(tf);
             break;
+        
+        case 183://getcwd
+            tf->eax = sys_getcwd(tf);
+            break;
+
         default:
             debug_log("unknown syscall: %X\n", tf->eax);
             tf->eax = -1;