#!/bin/ksh
echo 'Files of a pattern and the same size replaced by a new version ...'
echo ''
echo 'Path to new version of file eg. ./index.php'
read index
if [ -f "$index" ]; then
echo ''
echo 'Must find this string eg. foreach (glob('
read findstring
if [ ! -z "$findstring" ]; then
echo ''
echo 'Must be this many bytes long eg. 7006 or 11472 or 18330 or 18570 or 23882 or 26649 or 29451 or 38792'
read thismany
if [ ! -z "$thismany" ]; then
echo ''
echo 'Path to files to be replaced by this new version of file  eg. /a/path/to/root/directory/of/interest/'
read path
if [ -d "$path" ]; then
echo ''
echo 'Filespec or filename of files to be replaced by a new version of file eg. index.php'
read filespec
if [ ! -z "$filespec" ]; then
echo ''
echo 'Starting the assembly of information to later execute a copy script or manual cp statements ...'
# find $path -size ${thismany}c -name "$filespec" -exec cp $index {} \;
IFS=
result=`find $path -size ${thismany}c -name "$filespec" -exec grep -H "$findstring" {} \;`
if [ -z "$result" ]; then
echo "No candidate files for change"
exit
else 
indexsed=`echo "$index" | sed '/\//s//~!/g'`
echo $result | cut -d : -f 1 | uniq | sed "/^/s//cp $indexsed /g" | sed '/\~\!/s//\//g'
echo ''
echo 'Optional ksh file as above to create and get edit and execute advice eg. ./therealchange.ksh'
read thisksh
if [ ! -z "$findstring" ]; then
echo "#/bin/ksh" > $thisksh
echo $result | cut -d : -f 1 | uniq | sed "/^/s//cp $indexsed /g" | sed '/\~\!/s//\//g' >> $thisksh
echo "vi $thisksh # can edit, with a wq! to save, in vi editor"
echo "ksh $thisksh # can execute the statements to perform the copying"
exit
fi
fi
echo ''
echo 'Finished'
fi
else 
echo "$path path is non-existant"
fi
fi
fi
else
echo "$index file not found"
fi
exit