How to rename all files one by one through find command?

Question

I want to append a string to each file printed by the find command . It prints each file on a new line. The thing is that each file has a unique string to be appened to its name. This is how i need it to work

Run the find command Print the first result Have a read prompt for user to enter string , then append that string to the name. Print the second result. Have a read prompt .. then append that string to the second name ... and so on for all of the files

I have tried using while loop to do this , although haven't been successful yet

find . -type f -name 'file*' | while IFS= read file_name; do read -e -p "Enter your input : " string mv "$file_name" "$file_name $string" done

For example. Lets say the original filename is demo1.mp4 , and i enter 'test' in the read prompt , then the filename should be renamed to 'demo1 test.mp4' ( There should be a space before appending the string to the end of filename )

Jetchisel · Accepted Answer · 2021-04-24 14:32:30Z

You can do string slicing via Parameter Expansion, something like.

find . -type f -name 'file*' | { while IFS= read file_name; do name="${file_name%.*}" ext="${file_name#*"$name"}" read -e -p "Enter your input : " string </dev/tty echo mv "$file_name" "$name $string$ext" done }

Since there are two reads inside the while loop, reading from </dev/tty is another work around, not sure if it is an O.S. specific or not but if it is available /dev/tty then it should fix the issue.

There are two read inside the while loop another approach is to use Process Substitution, besides using /dev/tty

 while IFS= read -u9 file_name; do name="${file_name%.*}" ext="${file_name#*"$name"}" read -e -p "Enter your input : " string echo mv "$file_name" "$name $string$ext" done 9< <(find . -type f -name 'file*')

Remove the echo if you're satisfied with the output.

Some good examples are here Howto Parameter Expansion

Some good example of Process Substitution.

Thanks for answer , i tried it but for some reason the read prompt is not working
Right, I have to move the parameter expansion just after the do, try it now.
I think something still is a miss , the read prompt never comes. Check this out del.dog/raw/crirezutus
Yep, another fd for the first read should fix the issue.
Thanks , the solution at the bottom works flawlessly. The one at top still doesn't work for some reason . I am marking it as accepted answer . ( You might possibly want to edit / remove the top one )

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