%ifndef IO_DEFS
;  See nasm manual section 5.8
%define IO_DEFS

section .data
STDIN:      EQU     0
STDOUT:     EQU     1
STDERR:     EQU     2

SYS_READ:   EQU     0
SYS_WRITE:  EQU     1
SYS_EXIT:   EQU     60

SUCCESS:    EQU     0

%endif