pdfinfo -v (return code: 0)
pdfinfo version 0.41.0
Copyright 2005-2016 The Poppler Developers - http://poppler.freedesktop.org
Copyright 1996-2011 Glyph & Cog, LLC
pdfinfo --help (return code: 0)
pdfinfo version 0.41.0
Copyright 2005-2016 The Poppler Developers - http://poppler.freedesktop.org
Copyright 1996-2011 Glyph & Cog, LLC
Usage: pdfinfo [options] <PDF-file>
-f <int> : first page to convert
-l <int> : last page to convert
-box : print the page bounding boxes
-meta : print the document metadata (XML)
-js : print all JavaScript in the PDF
-rawdates : print the undecoded date strings directly from the PDF file
-enc <string> : output text encoding name
-listenc : list available encodings
-opw <string> : owner password (for encrypted files)
-upw <string> : user password (for encrypted files)
-v : print copyright and version info
-h : print usage information
-help : print usage information
--help : print usage information
-? : print usage information