Bring Ruby 1.6 Code up to 1.93

Bring Ruby 1.6 Code up to 1.93

Received this error from Ruby 1.93, the code is older (written for and
runs on Ruby 1.6)
makeCores.rb:2136:in block (2 levels) in same_contents': undefined
method>' for nil:NilClass (NoMethodError)
Line 2136 is this if f1.lstat.blksize > 0
class File
def File.same_contents(file1, file2)
return false if !File.exists?(file1) # The files are different if
file1 does not exist
return false if !File.exists?(file2) # The files are different if
file2 does not exist
return true if File.expand_path(file1) == File.expand_path(file2) #
The files are the same if they are the same file
# Otherwise, compare the files contents, one block at a time (First
check if both files are readable)
if !File.readable?(file1) || !File.readable?(file2)
puts "\n>> Warning : Unable to read either xco or input parameters
file"
return false
end
open(file1) do |f1|
open(file2) do |f2|
if f1.lstat.blksize > 0
blocksize = f1.lstat.blksize # Returns the native file system's
block size.
else
blocksize = 4096 # Set to a default value for
platforms that don't support this information (like Windows)
end
same = true
while same && !f1.eof? && !f2.eof?
same = f1.read(blocksize) == f2.read(blocksize)
end
return same
end
end
end
end
I can see that the lstat and blksize methods still exist.
Tried changing lstat to File.lstat the error message changed to:
makeCores.rb:2137:in block (2 levels) in same_contents': undefined
methodFile' for # (NoMethodError)
How do I bring this up to date with Ruby 1.93?