method

open_and_lock_file

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open_and_lock_file(filename, read_only) private

Open the specified filename (either in read-only mode or in read-write mode) and lock it for reading or writing.

The opened File object will be returned. If read_only is true, and the file does not exist, then nil will be returned.

All exceptions are propagated.

Show source

# File lib/pstore.rb, line 367
  def open_and_lock_file(filename, read_only)
    if read_only
      begin
        file = File.new(filename, RD_ACCESS)
        begin
          file.flock(File::LOCK_SH)
          return file
        rescue
          file.close
          raise
        end
      rescue Errno::ENOENT
        return nil
      end
    else
      file = File.new(filename, RDWR_ACCESS)
      file.flock(File::LOCK_EX)
      return file
    end
  end

open_and_lock_file

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