Fix munpack UTF-8 names in attachments

munpack-fix.sh

#!/bin/sh
find . -type f -iname '*X=' | while read name
do
  newname=$(echo "$name" | sed 's/[[:print:]]*\/=Xutf-8XBX//I; s/X=XXX=Xutf-8XBX//gI; s/X=$//' | base64 -d )
  dir=$(echo $name | sed 's/\/=Xutf-8XBX[A-Za-z0-9X=/+-]\+//I')
  mv --verbose "$name" "${dir}/${newname}"
done

Simple script which renames attaches decoded by munpack with UTF-8 encoded names.
Run it in directory with attaches.
Supports names in upper and lower cases.
Supports names with slash in it.

no suport space in name

i do this for name with space

find . -type f -iname 'X=' | while read name
do
newname=$(echo "$name" | sed 's/[[:print:]]/=XUTF-8XBX//I; s/X=XXX=XUTF-8XBX//gI; s/X==XUTF-8XBX//gI; s/X=$//' | base64 -d )
newnamenoespace=$(echo "$newname" | sed 's/ /_/g')
dir=$(echo $name | sed 's//=Xutf-8XBX[A-Za-z0-9X=/+-]+//I')
mv --verbose "$name" "${dir}/${newnamenoespace}"
done

Thanks both av-gantimurov and gilles0606 for your contributions. Simple, yet effective solutions, much appreciated even years later!