CODEWITHSUNDEEP
bashdouble-quotes
dothacker
dothacker

Reputation: 13

Extract some part from filename as variable

I have read some threads about extracting some parts from filename, but still cannot solve my problem. There are some files named aa - bb.txt, cc - dd.txt, ee - ff.txt, etc. And the last line in every file is like this:

somewordbbaa

for aa - bb.txt and for cc - dd.txt is:

somewordddcc

Then in ee - ff.txt is:

somewordffee

I want to write a shell script to delete the bbaa, ddcc, ffee in last line of the respective file. I have tried following:

#!/bin/bash
for file in *.txt
do
  artist=`echo $file | awk -F'[ .]' '{print $1}'`
  name=`echo $file | awk -F'[ .]' '{print $3}'`
  echo $artist >> artist
  echo $name >> name
  sed -i "s/$name$artist//" $file
done

And after I ran it,it threw this

sed: can't read aa: No such file or directory
sed: can't read -: No such file or directory
sed: can't read bb.txt: No such file or directory
sed: can't read cc: No such file or directory
sed: can't read -: No such file or directory
sed: can't read dd.txt: No such file or directory
sed: can't read ee: No such file or directory
sed: can't read -: No such file or directory
sed: can't read ff.txt: No such file or directory

I also tried this

#!/bin/bash
ls *.txt | sed 's/\.txt//' > full_name
cut -f1 -d" " full_name > artist
cut -f3 -d" " full_name > name

for file in `ls -1 *.txt`, item1 in artist, item2 in name #Is this right?
do
  tail -n -1 $file | sed 's/$item2$item1//' > $file.last #just the last line
done

It just showed this and had no reaction until pressing Ctrl+c

tail: cannot open `aa' for reading: No such file or directory

I think bash puts the blank of the filename as the separator, reads the $file as aa, -, bb.txt.

Can anyone give me some advice?

Upvotes: 1

Views: 113

Answers (1)

Vinbot
Vinbot

Reputation: 528

Because your files have a space in the name, try your original script but change this line:

sed -i "s/$name$artist//" $file

to this:

sed -i "s/$name$artist//" "$file"

Upvotes: 1

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