INSTALL/ExtendPersistentImg.sh

   1 #!/bin/sh
   2
   3 print_usage() {
   4     echo 'Usage:  ExtendPersistentImg.sh file size'
   5     echo '   file   persistent dat file'
   6     echo '   size   extend size in MB'
   7     echo 'Example:'
   8     echo '   sh ExtendPersistentImg.sh ubuntu.dat 2048'
   9     echo ''
  10 }
  11
  12 if [ -z "$1" -o "$1" = "-h" ]; then
  13     print_usage
  14     exit 1
  15 fi
  16
  17 if [ -z "$2" ]; then
  18     print_usage
  19     exit 1
  20 fi
  21
  22 file=$1
  23 size=$2
  24
  25 if [ ! -f "$file" ]; then
  26     echo "$file not exist."
  27     exit 1
  28 fi
  29
  30 if echo $size | grep -q "[^0-9]"; then
  31     print_usage
  32     exit 1
  33 fi
  34
  35 fsize=$(stat -c '%s' $file)
  36
  37 fsmod=$(expr $fsize % 1024)
  38 if [ $fsmod -ne 0 ]; then
  39     echo "File size of $file is not aligned by 1MB, please check."
  40     exit 1
  41 fi
  42
  43
  44 fsMB=$(expr $fsize / 1024 / 1024)
  45 total=$(expr $fsMB + $size)
  46
  47 magic=$(hexdump -n3 -e  '3/1 "%02X"' $file)
  48 if [ "$magic" = "584653" ]; then
  49     if which xfs_growfs >/dev/null 2>&1; then
  50         cmd=xfs_growfs
  51     else
  52         echo 'xfs_growfs not found, please install xfsprogs first'
  53         exit 1
  54     fi
  55 else
  56     if which resize2fs >/dev/null 2>&1; then
  57         cmd=resize2fs
  58     else
  59         echo 'resize2fs not found, please install e2fsprogs first'
  60         exit 1
  61     fi
  62 fi
  63
  64
  65 echo "Extend dat file... (current is ${fsMB}MB, append ${size}MB, total ${total}MB)"
  66 dd if=/dev/zero bs=1M count=$size status=none >> "$file"
  67 sync
  68
  69 freeloop=$(losetup -f)
  70 losetup $freeloop "$file"
  71
  72 if [ "$cmd" = "resize2fs" ]; then
  73     echo "Extend ext filesystem by resize2fs ..."
  74     echo "resize2fs $freeloop ${total}M"
  75     e2fsck -f $freeloop
  76     resize2fs $freeloop ${total}M
  77     ret=$?
  78 else
  79     echo "Extend xfs filesystem by xfs_growfs ..."
  80
  81     tmpdir=$(mktemp -d)
  82     mount $freeloop $tmpdir
  83     xfs_growfs $freeloop
  84     ret=$?
  85     umount $tmpdir && rm -rf $tmpdir
  86 fi
  87
  88 losetup -d $freeloop
  89
  90 echo ""
  91 if [ $ret -eq 0 ]; then
  92     echo "======= SUCCESS ========="
  93 else
  94     echo "======= FAILED ========="
  95 fi
  96 echo ""
  97