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Old 11-11-2004, 01:19 PM   #1
pauljtester
LQ Newbie
 
Registered: Apr 2004
Posts: 28

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sed back referencing


Hi -

Is there a way to back reference things in sed similar to the perl ( ) reference? I'm changing the tiff2pdf bash script. The default output filename is foo.pdf. I'd like it to take the file name of whatever is being fed to the script, remove the tif portion and add .pdf.

For example:

$ tiff2pdf fax0000000001.tif

should output fax0000000001.pdf

Here's what I was thinking it was...but this isn't working

#out=foo.pdf # default output filename
out=`sed 's/(fax[0-9][0-9]*)\.tif/\1\.pdf/'`

Thanks for your help.
pjt
 
Old 11-11-2004, 01:47 PM   #2
david_ross
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Registered: Mar 2003
Location: Scotland
Distribution: Slackware, RedHat, Debian
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Why not just use:
echo fax0000000001.tif | sed 's/tif$/pdf/'
 
Old 11-11-2004, 05:20 PM   #3
pauljtester
LQ Newbie
 
Registered: Apr 2004
Posts: 28

Original Poster
Rep: Reputation: 15
Good quesiton. I suppose I will just use that. It did exactly as I needed; I just changed

echo fax0000000001.tif
to
echo $1

and I'm set. Thanks for the help. pjt
 
  


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