Module: Spruz::SecureWrite

### Home Classes Methods

### In Files

- lib/spruz/secure_write.rb

### Methods

- #secure_write

### Files

- README.rdoc

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# Spruz::SecureWrite

### Public Instance Methods

secure_write(filename, content = nil, mode = 'w') click to toggle source

Write to a file atomically

    # File lib/spruz/secure_write.rb, line 4
    def secure_write(filename, content = nil, mode = 'w')
      temp = File.new(filename + ".tmp.#$$.#{Time.now.to_f}", mode)
      if content.nil? and block_given?
        yield temp
      elsif !content.nil?
        temp.write content
      else
        raise ArgumentError, "either content or block argument required"
      end
      temp.fsync
      size = temp.stat.size
      temp.close
      File.rename temp.path, filename
      size
    ensure
      temp and !temp.closed? and temp.close
      File.file?(temp.path) and File.unlink temp.path
    end

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