"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" for screen use
" opened in another screen? lets not play where's waldo anymore!
" this will politely tell me which screen's window it is open in so that I may
" go close it if I want, but still provide me the normal options
" this may need paths and command tweaked for your flavor of linux, but it
" is a great start for most.
"
augroup NoSimultaneousEdits
    autocmd!
    autocmd SwapExists * :call PrintScreenWindow()
augroup END

"autocmd Bufwritepre,filewritepre  * :set fileformat=unix
set ff=unix


function! PrintScreenWindow ()
  let fname = expand("%:p")
  " fix fname here, remove the path and leave only the filename/basename
  let fname =  fnamemodify(fname, ':t')
  " you might have to fix your path to lsof
  let my_command = "/usr/sbin/lsof | grep '" . fname . ".swp' | grep " . $USER . " | sed -n 's/^vim\\? \\+\\([0-9]\\+\\).*$/\\1/p' "
  let result = substitute(system(my_command), '\n','','')
  if result
    let my_cmd2 = "cat /proc/" . result . "/environ | xargs -0 echo | sed -n 's/.*WINDOW=\\([0-9]*\\).*/\\1/p' "
    let res2 = substitute(system(my_cmd2), '\n','','')
    if res2 || res2 == '0'
      echo 'This file is already opened in window: ' . res2
    else
      echo "command failed: " . my_cmd2
    endif
  else
    echo my_command . " : cmd failed"
  endif
endfunction