Module: QdumpfsUtils

Included in:
Qdumpfs::Command
Defined in:
lib/qdumpfs/util.rb

Instance Method Summary collapse

Instance Method Details

#chown_if_root(type, src, today) ⇒ Object 



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# File 'lib/qdumpfs/util.rb', line 218

def chown_if_root(type, src, today)
  return unless Process.uid == 0 and type != "unsupported"
  if type == "symlink"
    if File.respond_to?(:lchown)
      stat = File.lstat(src)
      File.lchown(stat.uid, stat.gid, today)
    end
  else
    stat = File.stat(src)
    File.chown(stat.uid, stat.gid, today)
  end
end

#convert_bytes(bytes) ⇒ Object 



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# File 'lib/qdumpfs/util.rb', line 156

def convert_bytes(bytes)
  if bytes < 1024
    sprintf("%dB", bytes)
  elsif bytes < 1024 * 1000 # 1000kb
    sprintf("%.1fKB", bytes.to_f / 1024)
  elsif bytes < 1024 * 1024 * 1000  # 1000mb
    sprintf("%.1fMB", bytes.to_f / 1024 / 1024)
  else
    sprintf("%.1fGB", bytes.to_f / 1024 / 1024 / 1024)
  end
end

#copy(src, dest) ⇒ Object

incomplete substitute for cp -p



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# File 'lib/qdumpfs/util.rb', line 143

def copy(src, dest)
  stat = File.stat(src)
  copy_file(src, dest)
  File.chmod(0200, dest) if windows?
  File.utime(stat.atime, stat.mtime, dest)
  File.chmod(stat.mode, dest) # not necessary. just to make sure
end

#copy_file(src, dest) ⇒ Object

We don’t use File.copy for calling @interval_proc.



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# File 'lib/qdumpfs/util.rb', line 115

def copy_file(src, dest)
  # begin
  #   File.open(src, 'rb') {|r|
  #     File.open(dest, 'wb') {|w|
  #       block_size = (r.stat.blksize or 8192)
  #       i = 0
  #       while true
  #         block = r.sysread(block_size)
  #         w.syswrite(block)
  #         i += 1
  #         @write_bytes += block.size
  #       end
  #     }
  #   }
  # rescue EOFError
  #   # この実装だとファイルサイズがblock_sizeより小さい場合にEOFErrorが発生する
  #   # それはしかたがないので無視する
  #   #       puts e.message
  # end
  FileUtils.cp(src, dest)
  unless FileTest.file?(dest)
    raise "copy_file fails #{dest}"
  else
    @write_bytes +=  File.size(src)
  end
end

#create_latest_symlink(dest, today) ⇒ Object 



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# File 'lib/qdumpfs/util.rb', line 262

def create_latest_symlink(dest, today)
  # 最新のバックアップに"latest"というシンボリックリンクをはる(Windowsだと動かない)
  latest_day = File.dirname(make_relative_path(today, dest))
    latest_symlink = File.join(dest, "latest")
  #      puts "force_symlink #{latest_day} #{latest_symlink}"
  File.force_symlink(latest_day, latest_symlink)
end

#datedir(date) ⇒ Object 



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# File 'lib/qdumpfs/util.rb', line 283

def datedir(date)
  s = File::SEPARATOR
  sprintf "%d%s%02d%s%02d", date.year, s, date.month, s, date.day
end

#detect_type(src, latest = nil) ⇒ Object 



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# File 'lib/qdumpfs/util.rb', line 181

def detect_type(src, latest = nil)
  type = "unsupported"
  if File.real_directory?(src)
    type = "directory"
  else
    if latest and File.real_file?(latest)
      case File.ftype(src)
      when "file"
        same_file = same_file?(src, latest)
#          puts "same_file? #{src} #{latest} result=#{same_file}"
        if same_file
          type = "unchanged"
        else
          type = "updated"
        end
      when "link"
        # the latest backup file is a real file but the
        # current source file is changed to symlink.
        type = "symlink"
      end
    else
 #       puts "latest=#{latest}"
      case File.ftype(src)
      when "file"
        type = "new_file"
      when "link"
        type = "symlink"
      end
    end
  end
  return type
end

#fmt(time) ⇒ Object 



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# File 'lib/qdumpfs/util.rb', line 214

def fmt(time)
  time.strftime('%Y/%m/%d %H:%M:%S')
end

#fputs(file, msg) ⇒ Object 



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# File 'lib/qdumpfs/util.rb', line 243

def fputs(file, msg)
  puts msg
  file.puts msg
end

#link(src, dest) ⇒ Object 



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# File 'lib/qdumpfs/util.rb', line 151

def link(src, dest)
  @link_bytes += File.size(src)
  File.force_link(src, dest)
end

#make_relative_path(path, base) ⇒ Object 



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# File 'lib/qdumpfs/util.rb', line 238

def make_relative_path(path, base)
  pattern = sprintf("^%s%s?", Regexp.quote(base), File::SEPARATOR)
  path.sub(Regexp.new(pattern), "")
end

#past_date?(year, month, day, t) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/qdumpfs/util.rb', line 288

def past_date?(year, month, day, t)
  ([year, month, day] <=> [t.year, t.month, t.day]) < 0
end

#restore_dir_attributes(dirs) ⇒ Object 



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# File 'lib/qdumpfs/util.rb', line 231

def restore_dir_attributes(dirs)
  dirs.each {|dir, stat|
    File.utime(stat.atime, stat.mtime, dir)
    File.chmod(stat.mode, dir)
  }
end

#same_directory?(src, dest) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/qdumpfs/util.rb', line 270

def same_directory?(src, dest)
  src  = File.expand_path(src)
  dest = File.expand_path(dest)
  return src == dest
end

#same_file?(f1, f2) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/qdumpfs/util.rb', line 168

def same_file?(f1, f2)
  #    File.real_file?(f1) and File.real_file?(f2) and
  #    File.size(f1) == File.size(f2) and File.mtime(f1) == File.mtime(f2)
  real_file = File.real_file?(f1) and File.real_file?(f2)
  same_size = File.size(f1) == File.size(f2)
  
  #    mtime1 = File.mtime(f1).strftime('%F %T.%N')
  #    mtime2 = File.mtime(f2).strftime('%F %T.%N')
  same_mtime = File.mtime(f1).to_i == File.mtime(f2).to_i
  #    p "#{real_file} #{same_size} #{same_mtime}(#{mtime1}<=>#{mtime2})"
  real_file and same_size and same_mtime
end

#sub_directory?(src, dest) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/qdumpfs/util.rb', line 276

def sub_directory?(src, dest)
  src  = File.expand_path(src)
  dest = File.expand_path(dest)
  src  += File::SEPARATOR unless /#{File::SEPARATOR}$/.match(src)
  return /^#{Regexp.quote(src)}/.match(dest)
end

#time_diff(start_time, end_time) ⇒ Object 



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# File 'lib/qdumpfs/util.rb', line 248

def time_diff(start_time, end_time)
  seconds_diff = (start_time - end_time).to_i.abs
  
  hours = seconds_diff / 3600
  seconds_diff -= hours * 3600
  
  minutes = seconds_diff / 60
  seconds_diff -= minutes * 60
  
  seconds = seconds_diff
  
  '%02d:%02d:%02d' % [hours, minutes, seconds]
end

#to_time(date) ⇒ Object 



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# File 'lib/qdumpfs/util.rb', line 300

def to_time(date)
  Time.local(date.year, date.month, date.day)
end

#to_unix_path(path) ⇒ Object 



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# File 'lib/qdumpfs/util.rb', line 296

def to_unix_path(path)
  path.gsub(/\\/, '/')
end

#to_win_path(path) ⇒ Object 



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# File 'lib/qdumpfs/util.rb', line 292

def to_win_path(path)
  path.gsub(/\//, '\\')
end