should be right?

include/config.h

@@ -63,4 +63,8 @@
 /* ssp */
 #define STACK_CHK_GUARD 0x7ABA5C007ABA5C00
 
+/* fs */
+#define FDT_MAX 8 // Maximum amount of file descriptors per process
+
+
 #endif

include/fs/initfs.h

@@ -11,5 +11,7 @@
 
 int initfs_init(struct limine_file* tar_file);
 int tar_lookup(unsigned char* archive, char* filename, char** out);
+int tar_read(char* filename, char** buf);
+int tar_exists(const char* filename);
 
 #endif

include/kernel.h

@@ -8,10 +8,13 @@
 #define KERNEL_H
 
 #include "limine.h"
+
 enum ErrorCodes {
-	ENOMEM,
-	EIO,
-	ENOENT
+	ENOMEM, // No memory
+	EIO,    // Input/output error
+	ENOENT, // No entry
+	EBADFD,  // Bad file descriptor
+	EMFILE  // Too many open files
 };
 
 #define CLEAR_INTERRUPTS __asm__ volatile("cli")

include/sched/process.h

@@ -11,6 +11,7 @@
 #include <config.h>
 #include <stdint.h>
 #include <limine.h>
+#include <stdbool.h>
 
 typedef enum {
     READY,
@@ -18,6 +19,13 @@ typedef enum {
     DEAD
 } status_t;
 
+struct fd {
+    int fd;
+    char filename[PROCESS_NAME_MAX];  // File opened
+    uint64_t cursor; // Cursor position in file
+    bool open;
+};
+
 struct process {
     size_t pid;
     char name[PROCESS_NAME_MAX];
@@ -26,6 +34,10 @@ struct process {
     struct cpu_status* context;
 	void* root_page_table; // Process PML4 (should contain kernel PML4 in higher half [256-511]
     void* kernel_stack; // Used for interrupts (syscall: int 0x80), defines the TSS RSP0
+    
+    struct fd fdt[FDT_MAX]; // File Descriptor Table
+    size_t next_free_fd;
+    
     struct process* next;
 };
 
@@ -38,7 +50,7 @@ void process_exit(void);
 
 void process_display_list(struct process* processes_list);
 
-void process_create_user(struct limine_file* file, char* name);
+
 void process_create_user_raw(char* file, int size, char* name);
 
 #endif