title: nasm linux x64 how do i find and cmp EOF to stop printing data from file to screen
body: <p>nasm linux x64 how do i find and cmp EOF to stop printing data from file to screen</p>
  <pre><code>
  section .data
   
  Nile_2 db '/home/mark/Desktop/mynewfile.txt', 0;
    
  
  section .bss
   fd_out resd 4  ; use this here instead of resb so there is enough room for long file names
   fd_in  resd 4
   info resd  26
  
  section .text
     global _start         ;must be declared for using gcc
      
  _start:
  ;open the file for reading
     mov rax, 5
     mov rbx, Nile_2      ; was file_name
     mov rcx, 0             ;for read only access
    ; mov rdx, 0777          ;read, write and execute by all
     int  0x80
      
     mov  [fd_in], eax
     ;mov rdx, 20
  READ:    
     ;read from file
     mov rax, 3
     mov rbx, [fd_in]
     mov rcx, info
     ;mov rdx, 26
     int 0x80
      
        
      
     ; print the info 
     mov rax, 4
     mov rbx, 1
     mov rcx, info
     ;mov rdx, 26
     int 0x80
     
     mov r10, info                 ; dec rdx
     cmp r10, 00
     jnz READ
     ;jmp READ           ;jnz Read
  HERE:   
  
     ; close the file
     mov rax, 6
     mov rbx, [fd_in]
     int  0x80 
         
     mov  eax,1             ;system call number (sys_exit)
     int  0x80              ;call kernel
  
  </code></pre>
  <p>how do i find out if sys_read or info is zero
  how do i find out EOF ??? i dont know how to use sys_read to check if no bytes have been read... when i try to cmp that info is zero bytes read i get the last few bytes over and over ???</p>