| commit | author | age | ||
| 849fbd | 1 | #!/bin/bash |
| G | 2 | # This shell script used mount/umount an linux system image and update it |
| 3 | ||
| 4 | mnt_boot=boot | |
| 5 | mnt_root=rootfs | |
| 6 | ||
| 7 | function mount_image() | |
| 8 | { | |
| 9 | img_file=$1 | |
| 10 | loop_dev=`losetup -f | cut -d/ -f3` | |
| 11 | ||
| 12 | if [ ! -s $img_file ] ; then | |
| 13 | echo "ERROR: $img_file not found!" | |
| 14 | exit 1; | |
| 15 | fi | |
| 16 | ||
| 17 | if [ -z $loop_dev ] ; then | |
| 18 | echo "ERROR: loop dev not found!" | |
| 19 | exit 2; | |
| 20 | fi | |
| 21 | ||
| 22 | echo "INFO: losetup /dev/${loop_dev} ${img_file}" | |
| 23 | losetup /dev/${loop_dev} ${img_file} | |
| 24 | if [ $? != 0 ] ; then | |
| 25 | echo "ERROR: losetup /dev/${loop_dev} ${img_file} failed!" | |
| 26 | exit 3; | |
| 27 | fi | |
| 28 | ||
| 29 | echo "INFO: kpartx -av /dev/${loop_dev}" | |
| 30 | kpartx -av /dev/${loop_dev} | |
| 31 | ||
| 32 | echo "INFO: mount ${mnt_boot} ${mnt_root}" | |
| 33 | mkdir -p ${mnt_boot} ${mnt_root} | |
| 34 | mount /dev/mapper/${loop_dev}p1 ${mnt_boot} | |
| 35 | mount /dev/mapper/${loop_dev}p2 ${mnt_root} | |
| 36 | ||
| 37 | echo "INFO: mount $img_file done." | |
| 38 | } | |
| 39 | ||
| 40 | function umount_image() | |
| 41 | { | |
| 42 | img_file=$1 | |
| 43 | ||
| 44 | mountpoint $mnt_boot > /dev/null 2>&1 | |
| 45 | if [ $? == 0 ] ; then | |
| 46 | echo "INFO: umount ${mnt_boot}" | |
| 47 | umount ${mnt_boot} | |
| 48 | rmdir ${mnt_boot} | |
| 49 | fi | |
| 50 | ||
| 51 | mountpoint $mnt_root > /dev/null 2>&1 | |
| 52 | if [ $? == 0 ] ; then | |
| 53 | echo "INFO: umount ${mnt_root}" | |
| 54 | umount ${mnt_root} | |
| 55 | rmdir ${mnt_root} | |
| 56 | fi | |
| 57 | ||
| 58 | # loop_dev should be 'loopX' such as 'loop9'. | |
| 59 | loop_dev=`losetup -a | grep $img_file| cut -d: -f1 | cut -d/ -f3` | |
| 60 | if [[ -z $loop_dev ]] ; then | |
| 61 | exit; | |
| 62 | fi | |
| 63 | ||
| 64 | if [[ -e /dev/mapper/${loop_dev}p1 ]] ; then | |
| 65 | echo "INFO: kpartx -dv /dev/${loop_dev}" | |
| 66 | kpartx -dv /dev/${loop_dev} | |
| 67 | fi | |
| 68 | ||
| 69 | echo "INFO: losetup -d /dev/${loop_dev}" | |
| 70 | losetup -d /dev/${loop_dev} | |
| 71 | ||
| 72 | echo "INFO: umount $img_file done." | |
| 73 | } | |
| 74 | ||
| 75 | ||
| 76 | function do_usage() | |
| 77 | { | |
| 78 | echo "" | |
| 79 | echo "Usage:" | |
| 80 | echo " $0 [-m] [-u] image_file" | |
| 81 | echo " -m: mount the image file" | |
| 82 | echo " -u: umount the image file" | |
| 83 | echo "" | |
| 84 | exit; | |
| 85 | } | |
| 86 | ||
| 87 | action= | |
| 88 | img_file= | |
| 89 | ||
| 90 | while getopts "mu" OPTNAME | |
| 91 | do | |
| 92 | case "${OPTNAME}" in | |
| 93 | "m") | |
| 94 | action=mount | |
| 95 | ;; | |
| 96 | ||
| 97 | "u") | |
| 98 | action=umount | |
| 99 | ;; | |
| 100 | ||
| 101 | "*") | |
| 102 | do_usage | |
| 103 | ;; | |
| 104 | esac | |
| 105 | done | |
| 106 | ||
| 107 | shift $(( $OPTIND-1 )) | |
| 108 | img_file=$1 | |
| 109 | ||
| 110 | if [[ -z $img_file ]] || [[ -z $action ]] ; then | |
| 111 | do_usage | |
| 112 | exit; | |
| 113 | fi | |
| 114 | ||
| 115 | if [ $action == "mount" ] ; then | |
| 116 | mount_image $img_file | |
| 117 | elif [ $action == "umount" ] ; then | |
| 118 | umount_image $img_file | |
| 119 | fi | |
| 120 | ||
