Library/move.sh

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