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Archivo archivo = SysAbrirArchivo("C:\\archivo.txt");
char* buffer = malloc(Archivo->Tamaño);
SysEstablecerPosiciónArchivo(archivo, 0); // es como un seek
SysLeerArchivo(archivo, buffer, Archivo->Tamaño);
SysCerrarArchivo(archivo);

;v2012-06-29
;
;This is a version of CMDARGS2 that uses only imported functions
;from the kernel, and a new, slightly expanded header, to make possible
;for the kernel to link functions/variables imported by the application,
;for itself, instead of having the application do that.
;;


APPBASE equ 1048576*2

bits 32
org APPBASE



%include "include/external_exported_variables.inc"
%include "include/external_exported_functions.inc"



;Our kernel must read this address, jump
;to it and then skip it:
;;
 IntendedBaseAddress  dq APPBASE
 NumberOfFieldsBelow  dq 7
 CommandLinePtr       dq 0
 CommandLineLength    dq 0
 CommandLineParamsPtr dq 0
 KernelFnExportsTable dq 0
 KernelVrExportsTable dq 0
 AppFnImportsTable    dq myImportsFunctionsTable
 AppVrImportsTable    dq 0



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;Clean the screen:
;;
 call dword[clrscr]





;;;INIT: Print each command line parameter in a separate line
;;;INIT: Print each command line parameter in a separate line
;;;INIT: Print each command line parameter in a separate line
;;;INIT: Print each command line parameter in a separate line





;Prepare to show the command line, one parameter a line.
;See if the length of the application's command line can possibly
;contain parameters. If it is 11 bytes or less, it cannot contain
;parameters as of our current kernel:
;;
 mov eax,[CommandLineLength]
 cmp dword[eax],11
 jbe .noparams



;Get rid of the application's raw FAT file name,
;as of our current kernel:
;;
 mov esi,[CommandLinePtr]
 call dword[adjustCommandLineFATname]

;If we detected that there are no parameters after
;stripping the file name, end:
;;
 cmp eax,0
  je .noparams






;Print the received command line:
;;
 ;      ESI == ASCIIZ string to print
 ;
 ;;
  ;Also get rid of the application's command line in our
  ;command line pointer:
  ;;
   mov esi,eax
   mov [CommandLinePtr],esi
   call dword[console_kprint_visible]


;Go to a new line:
;;
 call dword[console_doCRLFeffect]




;Get the number of parameters in the command line. At this
;point there cannot possibly be an parameter-less command line:
;;
 ;Inputs:
 ;      ESI == ASCIIZ string
 ;
 ;Outputs:
 ;      EAX == Number of present parameters in the command line,
 ;             each other separated with blank spaces.
 ;;
  mov esi,[CommandLinePtr]
   call dword[getCommandLineArgsCount]
    mov ebx,eax
    xor ecx,ecx


;Set our destination pointer to copy the specified
;parameters one by one:
;;
 mov edi,cmdstrbuff





;Do a loop to print all of the command line parameters
;individually:
;;
 .parloop:



 ;Copy the current argument:
 ;;
  ;Inputs:
  ;       ESI == Command line string
  ;       EDI == String buffer to copy the argument to
  ;       ECX == Argument number (from 0)
  ;
  ;
  ;Outputs:
  ;       EAX == Nonzero if the argument was found, or 0 if the argument was not found
  ;
  ;;
     call dword[copyCommandLineArg]



 ;Print the argument we just copied:
 ;;
  ;Print the received command line:
  ;;
   ;      ESI == ASCIIZ string to print
   ;
   ;;
    xchg esi,edi
     call dword[console_kprint_visible]
     call dword[console_doCRLFeffect]
    xchg esi,edi



 ;Go to the next parameter. If it is still
 ;below the natural parameter count, keep
 ;looping:
 ;;
  inc ecx
  cmp ecx,ebx
  jb .parloop






;;;END:  Print each command line parameter in a separate line
;;;END:  Print each command line parameter in a separate line
;;;END:  Print each command line parameter in a separate line
;;;END:  Print each command line parameter in a separate line



;We will jump here if our program has no parameters, which means
;that this program won't do anything if we have no command line
;parameters:
;;
 .noparams:





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;Return control to the kernel:
;;
 ret







;;;INIT: This is the most decent place to put application variables and data without memory management and without code jumps
;;;INIT: This is the most decent place to put application variables and data without memory management and without code jumps
;;;INIT: This is the most decent place to put application variables and data without memory management and without code jumps
;;;INIT: This is the most decent place to put application variables and data without memory management and without code jumps
;;;INIT: This is the most decent place to put application variables and data without memory management and without code jumps
;;;INIT: This is the most decent place to put application variables and data without memory management and without code jumps
;;;INIT: This is the most decent place to put application variables and data without memory management and without code jumps
;;;INIT: This is the most decent place to put application variables and data without memory management and without code jumps










myImportsFunctionsTable:
                   ImportsCount dd 6
                           clrscr dd clrscr@KernelCore
           console_kprint_visible dd console_kprint_visible@KernelCore
           console_doCRLFeffect   dd console_doCRLFeffect@KernelCore
adjustCommandLineFATname          dd adjustCommandLineFATname@KernelCore
getCommandLineArgsCount           dd getCommandLineArgsCount@KernelCore
copyCommandLineArg                dd copyCommandLineArg@KernelCore






cmdstrbuff times 1024 db 0










;;;END:  This is the most decent place to put application variables and data without memory management and without code jumps
;;;END:  This is the most decent place to put application variables and data without memory management and without code jumps
;;;END:  This is the most decent place to put application variables and data without memory management and without code jumps
;;;END:  This is the most decent place to put application variables and data without memory management and without code jumps
;;;END:  This is the most decent place to put application variables and data without memory management and without code jumps
;;;END:  This is the most decent place to put application variables and data without memory management and without code jumps
;;;END:  This is the most decent place to put application variables and data without memory management and without code jumps
;;;END:  This is the most decent place to put application variables and data without memory management and without code jumps