Open the file with the cursor on lineno given /path/to/file:linono on the command line

.vimrc

function! s:gotoline()
  let file = bufname("%")
  let names =  matchlist( file, '\(.*\):\(\d\+\)')
  if len(names) != 0 && filereadable(names[1])
    exec ":e " . names[1]
    exec ":" . names[2]
    if foldlevel(names[2]) > 0
      exec ":foldopen!"
    endif
  endif
endfunction
autocmd! BufNewFile *:* nested call s:gotoline()