Library/move.sh

   1 #!/bin/bash
   2
   3 shopt -s extglob nullglob
   4
   5 if [[ ${1:0:1} == - ]]; then
   6     v=$1
   7     shift 1
   8 else
   9     v=
  10 fi
  11
  12 function df_() {
  13     free=$(df -B1 "$1")
  14     free=${free% *%*}
  15     free=${free%%*( )}
  16     free=${free##* }
  17     echo "${free}"
  18 }
  19
  20 function mv_() {
  21     src=$1
  22
  23     mkdir -p /var/stash
  24     dst=$(mktemp -d /var/stash/"${src##*/}".XXXXXX)
  25
  26     if [[ -e ${src} ]]; then
  27         chmod --reference="${src}" "${dst}"
  28         chown --reference="${src}" "${dst}"
  29
  30         cp -aT $v "${src}" "${dst}" || {
  31             rm -rf "${dst}"
  32             exit 1
  33         }
  34
  35         rm -rf $v "${src}"
  36     else
  37         chmod 775 "${dst}"
  38         chown root.admin "${dst}"
  39     fi
  40
  41     ln -s "${dst}" "${src}"
  42 }
  43
  44 function shift_() {
  45     dir=${1%/}
  46
  47     if [[ -d ${dir} && ! -h ${dir} ]]; then
  48         used=$(du -bs "${dir}")
  49         used=${used%%$'\t'*}
  50         free=$(df_ /var)
  51
  52         if [[ $((used + 524288)) -lt ${free} ]]; then
  53             mv_ "${dir}"
  54         fi
  55     elif [[ ! -e ${dir} ]]; then
  56         rm -f "${dir}"
  57         mv_ "${dir}"
  58     fi
  59 }
  60
  61 shift_ "$@"