Using rename Post: 302894060

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Top Forums UNIX for Dummies Questions & Answers Using rename Post 302894060 by bakunin on Sunday 23rd of March 2014 06:19:29 PM

03-23-2014

Registered User

Ahem...

Quote:

Originally Posted by SriniShoo

Code:

Y=$(cut -c1-4 <<<${bname})
X=$(cut -f1 -d "_" <<<${bname} | cut -c5-)
Z=$(cut -f2 -d "_" <<<${bname})

This might work in bash (i do not know bash all too well), but definitely not in ksh. I don't believe a POSIX-shell would fathom it.

Quote:

Originally Posted by SriniShoo

Code:

for i in $(ls *.pdf)
do
bname="${i%.*}"
ext="${i##*.}"
Y=$(cut -c1-4 <<<${bname})
X=$(cut -f1 -d "_" <<<${bname} | cut -c5-)
Z=$(cut -f2 -d "_" <<<${bname})
j="${Y}_${Z}_${X}.${ext}"
mv ${i} ${j}
done

You use 4(!) fork()s to manipulate a simple filename, which is a waste of resources. Much better: split the filename using variable expansion like you already did, but instead of splitting into name and extension (which you do not need) split into the first 4 characters and the remainder. Then simply add the additional underscore. I am sure you can work out how. (but please do not post it here until the threads o/p has responded)

I hope this helps.

bakunin

bakunin

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pdfseparate

pdfseparate(1)						      General Commands Manual						    pdfseparate(1)

NAME

       pdfseparate - Portable Document Format (PDF) page extractor

SYNOPSIS

       pdfseparate [options] PDF-file PDF-page-pattern

DESCRIPTION

       pdfseparate extract single pages from a Portable Document Format (PDF).

       pdfseparate  reads  the PDF file PDF-file, extracts one or more pages, and writes one PDF file for each page to PDF-page-pattern, PDF-page-
       pattern should contain %d.  %d is replaced by the page number.

       The PDF-file should not be encrypted.

OPTIONS

       -f number
	      Specifies the first page to extract. If -f is omitted, extraction starts with page 1.

       -l number
	      Specifies the last page to extract. If -l is omitted, extraction ends with the last page.

       -v     Print copyright and version information.

       -h     Print usage information.	(-help and --help are equivalent.)

EXAMPLE

       pdfseparate sample.pdf sample-%d.pdf

       extracts all pages from sample.pdf, if i.e. sample.pdf has 3 pages, it produces

       sample-1.pdf, sample-2.pdf, sample-3.pdf

AUTHOR

       The pdfseparate software and documentation are copyright 1996-2004 Glyph & Cog, LLC  and  copyright  2005-2011  The  Poppler  Developers  -
       http://poppler.freedesktop.org

SEE ALSO

       pdfunite(1),

								 15 September 2011						    pdfseparate(1)

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