find_replace_in_files_input

#!/bin/sh
# ***************************************************************************
# find_replace_in_files_input
# Performs a recursive, case-sensitive directory find and replace of files
# For case-insensitive, use the -i switch in the grep call
# ***************************************************************************

# IFS (Internal Field Separator) default is whitespace, which is a 
# problem if there are spaces in the file path. Change IFS to carriage 
# return instead
IFS_backup=$IFS
IFS=$'\n'

echo "*******************************************************************"
echo "*              Find and Replace in Files Version 1.0              *"
echo "*******************************************************************"
if [ "$#" -ne 2 ]; then
	echo "The 'find_replace_in_files_input' script performs a recursive,"
	echo "case-sensitive directory find and replace of files."
	echo ""
	echo "Usage is:"
	echo "     find_replace_in_files_input <\"searchterm\"> <\"replaceterm\">"
	echo ""
	echo "Quotes surround terms. Spaces in the terms may cause failure."
	echo "Certain characters must be escaped (\/, etc)."
	echo ""
else
	startdirectory=$PWD
	searchterm=$1
	replaceterm=$2

	# get file names and store as loop variable $file
	for file in $(grep -l -R $searchterm $startdirectory)
	do
		# extract modification date and time of file
		MODTIME=`stat -c %Y "$file"`
		HMODTIME=`date -d @"$MODTIME"`
		# make the replacement with sed and update file
		sed -i "s|$searchterm|$replaceterm|ig" "$file"
		# change the modification date of the file back to the original date
		touch -d @$MODTIME "$file"
		echo "Modified: " "$file"
		echo "Modification date/time: " $HMODTIME "(sec since epoch: "$MODTIME")"
	done
	echo " *** Yay! All Done! *** "
fi
# change IFS back to whitespace
IFS=IFS_backup