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Full Discussion: how to find watermark in a pdf
Top Forums Shell Programming and Scripting how to find watermark in a pdf Post 302250395 by jim mcnamara on Thursday 23rd of October 2008 09:43:23 AM
Old 10-23-2008
pdf files can be in compressed format, so this may not help at all, and depending on the pdf engine the X Y and Z can be separate:

Code:
for file in *.pdf
do
   grep -l '(XYZ)Tj$' $file
done

You could also try:
Code:
for file in *.pdf
do
   if [[ `grep -q '(X)Tj$' $file` ]] ; then
       if [ `grep -q '(Y)Tj$' $file` ]] ; then
          if [[ `grep -q '(Z)Tj$' $file` ]] ; then
               echo "$file"
          fi
       fi
   fi
done

This last one is an EXTREMELY inefficient method.... but is usually the way watermarks are generated. One char at a time.
 

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LEARN ABOUT SUSE

lzfgrep

XZGREP(1)							     XZ Utils								 XZGREP(1)

NAME

       xzgrep - search compressed files for a regular expression

SYNOPSIS

       xzgrep [grep_options] [-e] pattern file...
       xzegrep ...
       xzfgrep ...
       lzgrep ...
       lzegrep ...
       lzfgrep ...

DESCRIPTION

       xzgrep  invokes	grep(1)  on  files  which may be either uncompressed or compressed with xz(1), lzma(1), gzip(1), or bzip2(1).  All options
       specified are passed directly to grep(1).

       If no file is specified, then the standard input is decompressed if necessary and fed  to  grep(1).   When  reading  from  standard  input,
       gzip(1) and bzip2(1) compressed files are not supported.

       If  xzgrep  is  invoked as xzegrep or xzfgrep then egrep(1) or fgrep(1) is used instead of grep(1).  The same applies to names lzgrep, lze-
       grep, and lzfgrep, which are provided for backward compatibility with LZMA Utils.

ENVIRONMENT

       GREP   If the GREP environment variable is set, xzgrep uses it instead of grep(1), egrep(1), or fgrep(1).

SEE ALSO

       grep(1), xz(1), gzip(1), bzip2(1), zgrep(1)

Tukaani 							    2009-07-05								 XZGREP(1)
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