@echo off
echo.
rem
rem this file: getlastpagenumber.cmd
rem version 0.1 from 600infos.de 2015-11-03
rem need Ghostscript e.g. download and install from http://www.ghostscript.com/download/
rem Install path "C:\prg\ghostscript" for using the script without changes \\ and have less problems with UAC
rem

:vars
  set __gs__="C:\prg\ghostscript\bin\gswin64c.exe"
  set __lastpagenumber__=1
  set __pdffile__="%~1"
  set __pdffilename__="%~n1"
  set __datetime__=%date%%time%
  set __datetime__=%__datetime__:.=%
  set __datetime__=%__datetime__::=%
  set __datetime__=%__datetime__:,=%
  set __datetime__=%__datetime__:/=% 
  set __datetime__=%__datetime__: =% 
  set __tmpfile__="%tmp%\%~n0_%__datetime__%.tmp"

:check
  if %__pdffile__%=="" goto error1
  if not exist %__pdffile__% goto error2
  if not exist %__gs__% goto error3

:main
  %__gs__% -dBATCH -dFirstPage=9999999 -dQUIET -dNODISPLAY -dNOPAUSE  -sstdout=%__tmpfile__%  %__pdffile__%
  FOR /F " tokens=2,3* usebackq delims=:" %%A IN (`findstr /i "number" test.txt`) DO set __lastpagenumber__=%%A 
  set __lastpagenumber__=%__lastpagenumber__: =%
  if exist %__tmpfile__% del %__tmpfile__%
  
:output
  echo The PDF-File: %__pdffilename__% contains %__lastpagenumber__% pages
  goto end
  
:error1
  echo no pdf file selected
  echo usage: %~n0 PDFFILE
  goto end

:error2
  echo no pdf file found
  echo usage: %~n0 PDFFILE
  goto end

:error3
  echo.can not find the ghostscript bin file
  echo.   %__gs__%
  echo.please download it from:
  echo.   http://www.ghostscript.com/download/
  echo.and install to "C:\prg\ghostscript"
  goto end
  
:end
  exit /b