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Top Forums UNIX for Dummies Questions & Answers Speeding up a Shell Script (find, grep and a for loop) Post 302221845 by Dave Stockdale on Tuesday 5th of August 2008 10:48:19 AM
Old 08-05-2008
Thanks for your reply Era.

I think I've got my list together now.

I established the list of all PDFs linked to using:

Code:
find . -name "*.htm*" -exec grep -o "[a-zA-Z0-9_]\{1,\}\.pdf" {} \; > /tmp/dave.out

And compared that to my list of existing PDFs as you suggested using:

Code:
pdfs=("file1.pdf" "file2.pdf" "file3.pdf" "file4.pdf")

for value in ${pdfs[@]}
do

set | grep $value /tmp/dave.out

# If grep finds nothing...
if [ $? == 1 ]
then
  echo "$value" >> /tmp/dave_files.out
fi

done

Turns out we have 3145 PDFs not linked to... Of course I still want to double and triple check this list, but I suppose I should be able to come up with some kind of shell script to remove all of these as well.

Thanks again for your help. Smilie
 

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ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME
zgrep - search possibly compressed files for a regular expression SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename... DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code: (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep. If the GREP environment variable is set, zgrep uses it as the grep program to be invoked. EXIT CODE
2 - An option that is not supported was specified. AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1) ZGREP(1)
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