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Shell script to get one to one map and rename the filename

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# 1  
Old 08-09-2013
Shell script to get one to one map and rename the filename
I have 2 files sorted by numerically. I need help with shell script to read these 2 files and do a 1:1 mapping and rename the filenames with the mapped case#;

For example:

Code:
cat case.txt
10_80
10_90

cat files.txt
A BCD_x 1.pdf
A BCD_x 2.pdf

ls pdf_dir
A BCD_x 1.pdf A BCD_x 2.pdf

Read these 2 txt and rename the pdf files in pdf_dir :
A BCD_x 1.pdf as A BCD_10_80.pdf
A BCD_x 1.pdf as A BCD_10_90.pdf

Last edited by iaav; 08-09-2013 at 03:52 PM..
# 2  
Old 08-09-2013
Something like this?
Code:
paste case.txt files.txt | while read case file
do
        echo mv "$file" "${file/x [0-9]/$case}"
done

Remove echo if output looks good.
# 3  
Old 08-11-2013
Another way is to read from both files using an extra file descriptor
Code:
{
while read case && read file <&3
do
  echo mv "$file" "${file/x [0-9]/$case}"
done
} <case.txt 3<files.txt

The following works in a standard shell
Code:
  echo mv "$file" `expr X"$file" : X"\(.*\)x [0-9][0-9]*\.pdf"`"$case".pdf

Last edited by MadeInGermany; 08-11-2013 at 03:19 PM.. Reason: expr
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