mount/mount.posixovlfs

   1 #!/bin/bash
   2
   3 # fstab-compatible mount script for posix-overlay fs
   4 # example invocation:
   5 # /sbin/mount.posixovlfs /mnt/vol/lower /mnt/vol/upper -o rw,default
   6
   7 set -e
   8 set -o pipefail
   9 set -u
  10
  11 sourcestring=$1
  12 shift
  13 targetdir=$1
  14 shift
  15 options=''
  16
  17 while [ $# -gt 0 ]
  18 do
  19         case "$1" in
  20         -o)
  21                 shift
  22                 options=$1
  23                 ;;
  24         *)
  25                 echo "unknown parameter: $1" >&2
  26                 exit 1
  27                 ;;
  28         esac
  29         shift
  30 done
  31
  32 if [[ $sourcestring =~ posixovl:(.+) ]]
  33 then
  34         sourcedir=${BASH_REMATCH[1]}
  35 else
  36         sourcedir=$sourcestring
  37 fi
  38
  39 declare -a opts=()
  40 fuse_options=''
  41 IFS=','
  42 for opt in $options
  43 do
  44         case "$opt" in
  45         default|rw) true;;
  46         ro)     echo "readonly is not supported" >&2
  47                 exit 2
  48                 ;;
  49         assume_vfat)
  50                 opts+=(-F)
  51                 ;;
  52         *)      fuse_options="$fuse_options${fuse_options:+,}$opt"
  53                 ;;
  54         esac
  55 done
  56 IFS=$' \t\n'
  57
  58 if [ -z "$fuse_options" ]
  59 then
  60         mount.posixovl "${opts[@]}" -S "$sourcedir" "$targetdir"
  61 else
  62         mount.posixovl "${opts[@]}" -S "$sourcedir" "$targetdir" -- "$fuse_options"
  63 fi