#Leopold von Niebelschuetz-Godlewski
#Homework for "Programming from the Ground Up - Chapter 5"
#Purpose: Creates a file that's called "heynow.txt" with the string "Hey diddle diddle!\n".
.section .data

#system call numbers
.equ SYS_OPEN, 5
.equ SYS_WRITE, 4
.equ SYS_CLOSE, 6
.equ SYS_EXIT, 1

#options for SYS_OPEN call
.equ O_RDONLY, 0
.equ O_CREAT_WRONLY_TRUNC, 03101
.equ PERMISSIONS, 0666

#strings to be used
diddle_string:
.ascii "Hey diddle diddle!\n\0"

file_name:
.ascii "heynow.txt\0"

.section .text
.globl _start

#okay, game time >.<

_start:
	#no code required here... hi =)....

get_fd_write:
	movl $SYS_OPEN, %eax
	movl $file_name, %ebx
	movl $O_CREAT_WRONLY_TRUNC, %ecx
	movl $PERMISSIONS, %edx
	int $0x80				#fd now stored in %eax
	pushl %eax

write_file:
	movl $20, %edx				#size of our string
	movl %eax, %ebx				# %eax contains the fd
	movl $SYS_WRITE, %eax
	movl $diddle_string, %ecx
	int $0x80

close_files:
	movl $SYS_CLOSE, %eax
	popl %ebx
	int $0x80

exit:
	movl $SYS_EXIT, %eax
	movl $0, %ebx
	int $0x80