Add create_file syscall, CE mkfile command, FatFS formatting fixes

kernel/syscall/syscall.c

@@ -459,6 +459,30 @@ DEFINE_SYSCALL (sys_read_dir_entry) {
   return SYSRESULT (ret);
 }
 
+/* int create_file (char* path) */
+DEFINE_SYSCALL (sys_create_file) {
+  uintptr_t uvaddr_path = a1;
+
+  struct limine_hhdm_response* hhdm = limine_hhdm_request.response;
+
+  uintptr_t out_paddr;
+
+  spin_lock (&proc->procgroup->lock);
+  out_paddr = mm_v2p (&proc->procgroup->pd, uvaddr_path);
+  spin_unlock (&proc->procgroup->lock);
+
+  if (out_paddr == 0)
+    return SYSRESULT (-ST_BAD_ADDRESS_SPACE);
+
+  const char* path = (const char*)((uintptr_t)hhdm->offset + out_paddr);
+
+  spin_lock (&proc->lock);
+  int ret = vfs_create_file (proc, proc->cwv, path);
+  spin_unlock (&proc->lock);
+
+  return SYSRESULT (ret);
+}
+
 /* int get_exec_pid (void) */
 DEFINE_SYSCALL (sys_get_exec_pid) { return SYSRESULT (proc->exec_pid); }
 
@@ -485,6 +509,7 @@ static syscall_handler_func_t handler_table[] = {
     [SYS_GET_PROCGROUP] = &sys_get_procgroup,
     [SYS_GET_EXEC_PID] = &sys_get_exec_pid,
     [SYS_READ_DIR_ENTRY] = &sys_read_dir_entry,
+    [SYS_CREATE_FILE] = &sys_create_file,
 };
 
 syscall_handler_func_t syscall_find_handler (int syscall_num) {