Linux shell script to copy and rename multiple files - shell

Question

I have this snippet:
#!/bin/bash
parent=/parent
newfolder=/newfolder
mkdir "$newfolder"
for folder in "$parent"/*; do
if [[ -d $folder ]]; then
foldername="${folder##*/}"
for file in "$parent"/"$foldername"/*; do
filename="${file##*/}"
newfilename="$foldername"_"$filename"
cp "$file" "$newfolder"/"$newfilename"
done
fi
done
I do need to turn it around in a way that the copied files would be named after the folder they are being moved to (e.g. moving to the /root/Case22 files would be renamed to case22_1.jpg, case22_2.docx, case22_3.JPG etc). The files would be copied from USB and both destination and source directries would be entered by the user. I have written everything else and it works apart from actual renaming and thought I could adapt this snippet.
thanks
p.s. the snippet is written by Jahid and found on stackoverflow

Answer 1

you can try something like this;
#!/bin/bash
parent=/root
a=1
for file in $parent/Case22*; do
filename="${file%.*}"
extension="${file##*.}"
newfilename=$(printf "$filename"_"$a"."$extension")
mv -- "$file" "$newfilename"
let a=a+1
done

Answer 2

Thanks for the help. I have found the solution and thought I might post it here in case someone else will be looking at this.
As the title suggests I needed a Linux shell script to copy and rename multiple files keeping original directory tree (the file source and archive locations would be specified by the user of the script). Here is the code that I came up with after few days research of different sources (it includes a trap so only one instance of script would be running at a time):
lockdir=/var/tmp/mylock #directory for lock file creation
pidfile=/var/tmp/mylock/pid #directory to get the process ID number
if ( mkdir ${lockdir} ) 2> /dev/null; then #main argument to create lock file
echo $$ > $pidfile #if successful script will proceed, otherwise it will skip to the else part of the statement at the end of the script
trap 'rm -rf "$lockdir"; exit $?' INT TERM EXIT #trap to capture reasons of script termination and removal of the lock file so it could be launched again
#start of the main script body, part of successful "if" statement
# read entry_for_testing_only #request for user entry to keep script running and try to run another script instance
findir="$2/$(basename "$1")" #variable that defines final directory to which files from USB will be copied
if [ ! -d "$1" ]; then #testing if first directory entry is a valid directory’’
echo "$1" "is not a directory"
echo ""
exit
else
if [ ! -d "$2" ]; then #testing if second entry is a valid directory
echo "archive directory non existant"
exit
else
if [ -d "$findir" ] && [ "$(ls -A "$findir")" ]; then #testing if second entry directory contains the same name folders and if the folders are empty - to avoid file overwriting
echo "such folder already there and it's not empty"
exit
else
if [ ! -d "$findir" ] ; then #last archive directory argument to create final archive directory
mkdir "$findir"
else true
fi
fi
fi
fi
rsync -a "$1"/ "$findir" #command to copy all files from the source to the archive retaining the directory tree
moved_files="$(find "$findir" -type f)" #variable that finds all files that have been copied to the archive directory
for file in $moved_files; do #start of the loop that renames copied files
counter="$((counter+1))" #incrementation variable
source_name="$(basename "$1")" #variable that captures the name of the source directory
new_name="$source_name"_"$counter" #variable that puts start of the file name and incrementation element together
if echo "$file" | grep "\." #argument that captures the extension of the file
then
extension="$(echo "$file" | cut -f2 -d. )"
else
extension=
fi
full_name="$new_name"."$extension" #variable that defines the final new name of the file
dir="$(dirname "${file}")" #variable that captures the directorry address of currently looped file
mv "$file" "$dir/$full_name" #move command to rename currently looped file with the final new name
done
#end of the main script body, unsuccessful "if" statement continues here
else
echo "Another instance of this script is already running. PID: $(cat $pidfile)"
fi