#!/bin/bash
#  changedefaults -- change a plist setting in 10.4.x
#  Written by Scott Russell, University of Notre Dame
#+ with advice from Nigel Kersten, University of NSW, Australia

SUCCESS=0
ERR_NOARGS=65

if [[ -z "$3" ]] ; then
        echo ""
        echo "     *** Usage: `basename $0` path-to-plist find-string replacement-string"
        echo "     *** Example: `basename $0` ~/Library/Preferences/com.apple.mail.plist CacheAllBodies CacheNoMessages"
	echo "     *** ... replaces all instances of \"CacheAllBodies\" with \"CacheNoMessages\" in \"com.apple.mail.plist\""
        echo ""
        exit $ERR_NOARGS
else
	# Convert the plist from binary to xml format
	plutil -convert xml1 "$1"

	# Read the file and change old item for new item
	sed s/"$2"/"$3"/ "$1" > temp-file.plist
	mv -f temp-file.plist "$1"

	# Convert the plist back to binary format
#	plutil -convert binary1 "$1"
fi

exit $SUCCESS