Script to fix permissions issues caused by a student IT worker running `chmod -R 755` in my OSX home directory

fix.rb

require 'shellwords'

# Dir.glob was acting weird w/ spaces in file names, so just used find:
IO.popen("find Old\\ Home/apilsch/ -type f") do |fp|
	while not (output = fp.gets).nil?
		# Full file path:
		file = "/Users/apilsch/Desktop/#{output.strip}"
		# Location of original file on disk:
		disk_file = file.sub("Desktop/Old\ Home/apilsch/", "")
		next if not File.exist? disk_file
		# Similar to the problem w/ Dir.glob, File.stat was acting strange w/ spaces in file names, so just use commands:
		old_mode = %x(/usr/bin/stat -f '%A' #{Shellwords.escape(file)}).to_i
		new_mode = %x(/usr/bin/stat -f '%A' #{Shellwords.escape(disk_file)}).to_i
		if old_mode != new_mode
			puts "Changing #{disk_file} from #{new_mode} to #{old_mode}"
			# chmod the file:
			%x(/bin/chmod #{old_mode} #{Shellwords.escape(disk_file)})
		else
			puts "File #{disk_file} is fine"
		end
	end
end