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file renaming with if else clause

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# 1  
Old 11-25-2011
file renaming with if else clause
Hi.
I am trying to rename some files with an if else clause.

So far I am doing it this way:

for file in *;
do mv $file `echo $file|sed 's/$/.txt/'`;
done

This make all my files have a .txt at the end of their name.
But since I had some .jpg files in my folder they end up being .jpg.txt.
So now I am stripping just the jpg files from their txt end:

>for file in *.jpg.txt; do mv $file `echo $file|sed 's/.jpg.txt/.jpg/'`; done

How could I do this in awk or shell scripting with an if else clause:

I would like my script to be in this format:

if (my file ends on jpg don't do anything)
else (add jpg to my file)

Thankful for any help!
# 2  
Old 11-25-2011
Maybe this:
Code:
find ./ \! -name "*.jpg" -type f | \
while read fname
do
     mv "${fname}" "${fname}.txt"
done

Or even better:
Code:
find ./ \! -name "*.jpg" -type f | xargs -t -I {} mv "{}" "{}.txt"

If your find supports "-printf" option:
Code:
# List all commands
find ./ \! -name "*.jpg" -type f -printf "mv %h/%f %h/%f.txt\n"
# Execute the commands
find ./ \! -name "*.jpg" -type f -printf "mv %h/%f %h/%f.txt\n" | sh

Last edited by felipe.vinturin; 11-25-2011 at 09:55 AM..
# 3  
Old 11-25-2011
I think I am starting to understand what you did:
find ./ \!-name "*.jpg" -type f

Find in this directory all files that are not jpg files! Correct?
How would I make this statement for 2 files at once? Jpg and png?
Later on you are creating a variable called fname? Does this name come from
-name -type f: fname ???

Last: How would you go about the opposite: Strip all files of the jpg:
find ./ -name "*.jpg" -type f

do mv "${fname}" "${fname}" ??? How do you say you want to get rid of the jpg...?

Thank you
# 4  
Old 11-25-2011
You are correct! The "\!" negates the "-name" option, so, it means: not -name "*.jpg"

About your other questions:
Code:
# 1. The "read fname" puts the result of the find command in the variable fname.
# Try: man read

# 2. In the same find command you can negate jpg and png
find ./ \( \! -name "*.jpg" -a \! -name "*.png" \) -type f

# For further, find man pages are really good!

# 3. Removes the .jpg
find ./ -name "*.jpg" -type f | \
while read fname
do
     # The sed below removes the ".jpg" from the contents of the variable: fname
     nFName=`echo "${fname}" | sed 's#\.jpg##'`
     mv "${fname}" "${nFName}"
done

# 5  
Old 11-25-2011
Code:
for file in *
do
  case $file in
    *.jpg) ;; ## do nothing
    *) mv "$file" "$file.txt" ;;
  esac
done

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