scripts/functions.sh

   1 #!/bin/sh
   2
   3
   4 get_magic_word() {
   5         dd if=$1 bs=4 count=1 2>/dev/null | od -A n -N 4 -t x1 | tr -d ' '
   6 }
   7
   8 get_fs_type() {
   9         local magic_word="$(get_magic_word "$1")"
  10
  11         case "$magic_word" in
  12         "3118"*)
  13                 echo "ubifs"
  14                 ;;
  15         "68737173")
  16                 echo "squashfs"
  17                 ;;
  18         *)
  19                 echo "unknown"
  20                 ;;
  21         esac
  22 }
  23
  24 round_up() {
  25         echo "$(((($1 + ($2 - 1))/ $2) * $2))"
  26 }