.bin/umount-tree

   1 #!/bin/bash
   2
   3 umount_one() {
   4         mounts=( $(gawk -v p="${root%/}" '$2 ~ "^"p { print $2 }' /proc/mounts | tac) )
   5
   6         if ! ${toplevel} && [[ ${#mounts[@]} -gt 0 ]] ; then
   7                 if [[ ${mounts[-1]} == "${root%/}" ]] ; then
   8                         unset "mounts[-1]"
   9                 fi
  10         fi
  11
  12         if [[ ${#mounts[@]} -eq 0 ]] ; then
  13                 if ! ${quiet} ; then
  14                         echo "No mounts found for ${root}:"
  15                         mount
  16                 fi
  17                 return
  18         fi
  19
  20         if ! ${quiet} ; then
  21                 echo "Unmounting: "
  22                 printf '\t%s\n' "${mounts[@]}"
  23         fi
  24
  25         if ${prompt} ; then
  26                 printf "OK? [y/N] "
  27                 read v
  28         else
  29                 v=y
  30         fi
  31         flags=()
  32         ${quiet} || flags+=( -v )
  33         [[ ${v} == "y" ]] && sudo umount "${flags[@]}" "${mounts[@]}"
  34 }
  35
  36 main() {
  37         if [[ -z $1 ]] ; then
  38                 echo "Usage: $0 <root>"
  39                 exit 1
  40         fi
  41
  42         prompt=true
  43         toplevel=true
  44         quiet=false
  45         while [[ $# -gt 0 ]] ; do
  46                 case $1 in
  47                 -y) prompt=false;;
  48                 -s) toplevel=false;;
  49                 -q) quiet=true;;
  50                 *) break;;
  51                 esac
  52                 shift
  53         done
  54
  55         while [[ $# -gt 0 ]] ; do
  56                 root=$1
  57                 shift
  58                 umount_one "${root}"
  59         done
  60 }
  61 main "$@"