#!/bin/bash
# renameOKx - Korn shell script from UVSI stored in: /home/uvadm/sf/util/
# renameOKx - rename directory of filenames <-- delete chars in HEX, does NOT work ???
#           - Deleting all LowBit (except LineFeed) & HighBit characters 
# renameOK  <-- Alternate version specifies delete chars in OCTAL & does work 
# renameOKx <-- This script specifies delete chars in HEX, but does NOT work - WHY NOT ???
#           --> see test input/output at bottom
#Note - must use 'bash' shell for HEX to work at all, but complement option not working in hex
#
echo "$0 - rename all files in directory Deleting LowBit (except LineFeed) & HighBit characters"
dir="$1"; 
if [[ ! -d "$dir" ]]; then 
   echo "usage: renameOKx directory "
   echo "       ==================="
   echo " - arg1 must be a directory"
   exit 1; fi
#
reply="n"
until [ "$reply" = "y" ]
do echo "enter to rename files ? y/n"
   read reply
done
x=0; y=0
for dfn in $dir/*
do fn1=${dfn##*/}
   # fn2=$(echo $fn1 | tr -cd '\12\40-\176')  #<-- octal obsolete & stupid
   fn2=$(echo $fn1 | tr -cd \$'\x0A\x20-\x7E') #<-- hex preferred, but has bugs ?
   #Note - option 'c' of '-cd' COMPLEMENTS (deletes chars not specified) 
   #     - does NOT work if chars specified in HEX, but OK if OCTAL - WHY diff ???
   # echo "Debug: fn1=$fn1 fn2=$fn2"
   let x=x+1
   if [[ $fn1 == $fn2 ]]; then continue; fi
   mv -i "$dir/$fn1" $dir/$fn2
   #==========================
   let y=y+1
   echo "file# $x $dir/$fn1 - renamed to: $dir/$fn2"
done
echo "total $x files, $y renamed deleting LowBit (except LineFeed) & HighBit characters"
exit 0
# renameOKx tmp1
# ==============
# 
# Original filenames in directory tmp1
# -rw-r----- 1 uvadm apps   84335 Nov  5 08:09 Another.jpg
# -rw-r----- 1 uvadm apps 1500403 Nov  5 08:10 IMG_20170121_142512.jpg
# -rw-r----- 1 uvadm apps   48151 Nov  5 08:11 Mia - tomato% +head art.jpg
# -rw-r----- 1 uvadm apps   92384 Nov  5 09:11 My art: at^ _vsb |offices.jpg
# 
# Resulting filenames after --> renameOKx tmp1
# -rw-r----- 1 uvadm apps   84335 Nov  5 09:14 Anotherjpg
# -rw-r----- 1 uvadm apps 1500403 Nov  5 09:14 IMG_20170121_142512jpg
# -rw-r----- 1 uvadm apps   92384 Nov  5 09:14 Mart:at^_vsbofficesjpg
# -rw-r----- 1 uvadm apps   48151 Nov  5 09:14 Miatomatoheadartjpg
# 
# renameOK tmp1  <-- Alternate script specifies delete chars in Octal works OK
# =============    - why don't renameOKx HEX chars work ???