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Full Discussion: how to get number of pages in a PDF file
Top Forums Shell Programming and Scripting how to get number of pages in a PDF file Post 302218774 by fpmurphy on Saturday 26th of July 2008 12:13:57 PM
Old 07-26-2008
The following is a short shell script which I hacked together based on the PDF Reference V1.7 which seems to do the job across a wide spectrum of PDF document types.

Code:
#!/bin/ksh93
#
#  USAGE: pdfcount file.pdf
#

[[ "$#" != "1" ]] && {
   print "ERROR: No file specified"
   exit 1
}

numpages=0

strings $1 | grep "/Count" |
while read line
do
   num=${line/*([[:print:]])+(Count )?(-)+({1,4}(\d))*([[:print:]])/\4}
   (( num > numpages)) && numpages=$num
done

print $numpages

exit 0

Note this shell script is written for ksh93, not pdksh or ksh88. It can easily be ported to other shells but that I will leave as an exercise to the reader.
 

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LEARN ABOUT SUNOS

ptob

ptob(9F)						   Kernel Functions for Drivers 						  ptob(9F)

NAME

       ptob - convert size in pages to size in bytes

SYNOPSIS

       #include <sys/ddi.h>

       unsigned long ptob(unsigned long numpages);

INTERFACE LEVEL

       Architecture independent level 1 (DDI/DKI).

PARAMETERS

       numpages        Size in number of pages to convert to size in bytes.

DESCRIPTION

       This  function returns the number of bytes that are contained in the specified number of pages. For example, if the page size is 2048, then
       ptob(2) returns	4096. ptob(0) returns  0.

RETURN VALUES

       The return value is always the number of bytes in the specified number of pages. There are no invalid input values, and no checking will be
       performed  for  overflow in the case of a page count whose corresponding byte count cannot be represented by an	unsigned long. Rather, the
       higher order bits will be ignored.

CONTEXT

       ptob() can be called from user or interrupt context.

SEE ALSO

       btop(9F), btopr(9F), ddi_ptob(9F)

       Writing Device Drivers

SunOS 5.10							    11 Apr 1991 							  ptob(9F)
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