Replace One Safari Bookmark.sh

#!/bin/sh
# Copyright © 2013, David Koff for the J. Paul Getty Trust

# ---------------------------------------------------------------------------
# 1. assign variables to discover users with UID > 500
# 2. back-up those accounts' safari bookmarks & test for that backup
# 3. convert the bookmark plist, find & change one bookmark, then resave bookmarks file
# ---------------------------------------------------------------------------

# part 1: assign variables
over500=`dscl . list /Users UniqueID | awk '$2 > 500 { print $1 }'`

# ---------------------------------------------------------------------------
# 2. cycle through users & backup each user's bookmarks
# 3. convert, modify & then resave the bookmarks file
# ---------------------------------------------------------------------------
for i in $over500
do
    cd /Users/$i/Library/Safari
    zip BookmarksBackup.zip Bookmarks.plist
    echo "backup of bookmarks SUCCESSFUL for the $i account."
    plutil -convert xml1 Bookmarks.plist #convert from binary to XML
    perl -pi -e 's/http:\/\/go\/workforce/http:\/\/go.getty.edu\/workforcelite/g' Bookmarks.plist
    plutil -convert binary1 Bookmarks.plist #convert back to binary
done
open -a Safari.app
exit 0