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windowspdfbatch-filepdftk

Win bat file: How to get the result of FIND into a new variable?

The pdftk tool "dump_data" function can be used to deliver meta information about a pdf, including the number of pages. The following command...

pdftk test.pdf dump_data | find "NumberOfPages"

...outputs the full data dump line, for example:

"Number of pages: 32"

How can I get the count value (32 in the above case) into a new variable for further processing in the bat file?

Solution

  • If the format of the line is fixed and matches the one you've shown, you could try something like this:

    @ECHO OFF
>testfile ECHO Number of pages: 32
FOR /F "delims=: tokens=2" %%A IN ('TYPE testfile ^| FIND "Number of pages"') DO SET /A pagenum=%%A
ECHO %pagenum%

    Outputs:

    32

    Naturally, >testfile ECHO ... line is just for testing purposes, and the TYPE testfile part of the FOR loop should be replaced by your pdftk test.pdf dump_data.