Get file size with stat syscall

Question

I\'m trying to get file size wit stat syscall with assembly (nasm):

section .data
    encodeFile db \"/home/user/file\"

section .bss
    stat resb 64

struc         


        

Answer 1

In my reference (although it is 32 bit) the STAT structure is described a little bit different. At least, your structure has size different from 64.

struct STAT
  .st_dev     dw  ?     ; ID of device containing file
  .pad1       dw  ?
  .st_ino     dd  ?     ; inode number
  .st_mode    dw  ?     ; protection
  .st_nlink   dw  ?     ; number of hard links
  .st_uid     dw  ?     ; user ID of owner
  .st_gid     dw  ?     ; group ID of owner
  .st_rdev    dw  ?     ; device ID (if special file)
  .pad2       dw  ?
  .st_size    dd  ?     ; total size, in bytes
  .st_blksize dd  ?     ; block size
  .st_blocks  dd  ?

  .st_atime   dd  ?     ; time of last access
  .unused1    dd  ?

  .st_mtime   dd  ?     ; time of last modification
  .unused2    dd  ?

  .st_ctime   dd  ?     ; time of last status change
  .unused3    dd  ?
  .unused4    dd  ?
  .unused5    dd  ?
ends

Although, these differences does not explain why your program does not work. What is actually the size of "/home/usr/file". Isn't it 0?