Find and rename files and directories with characters that windows does not support.

find_and_rename_bad_windows_filenames.sh

#!/bin/env bash

# run like:
# $ find_and_rename_bad_windows_filenames.sh mypath1 mypath2
# You may need to run a few times in case there are multi-spaces at beginning or end of files.
# All can be done in one go but too lazy to optimize further.

find_regexp='.*/[^/]*[<>:"\\|?*'$'\b'$'\t''][^/]*'
#tr_from='<>:"\\|?*\b\t'
#tr_to='\-\-\-\-\-\-@\-  '

export IFS=

# replace bad characters from filenames
find "$@" -depth -regex "$find_regexp" -print0 | \
  while read -r -d "" badfile; do
    dir="${badfile%/*}"
    filename="${badfile##*/}"

    # filename="        "$'\b'"\\*\"?<>:|"
    # newname=`echo "$filename" | tr "$tr_from" "$tr_to"`
    newname=${filename//$'\t'/ }
    newname=${newname//$'\b'/ }
    newname=${newname//\\/-}
    newname=${newname//\*/-}
    newname=${newname//\"/_}
    newname=${newname//\?/@}
    newname=${newname//\</-}
    newname=${newname//\>/-}
    newname=${newname//:/-}
    newname=${newname//\|/-}

    mv -i -v "$badfile" "$dir/$newname"
  done

# remove also leading and trailing whitespaces from files
find "$@" -depth \( -name "* " -o -name " *" -o -name "*." \) -print0 | \
  while read -r -d "" badfile; do
    dir="${badfile%/*}"
    filename="${badfile##*/}"

    newname="${filename## }"
    newname="${newname%% }"
    newname="${newname%%.}"

    mv -i -v "$badfile" "$dir/$newname"
  done