CODEWITHSUNDEEP
bashawk
user3556280
user3556280

Reputation: 23

create and rename multiple copies of files

I have a file input.txt that looks as follows.

abas_1.txt
abas_2.txt
abas_3.txt
1fgh.txt
3ghl_1.txt
3ghl_2.txt

I have a folder ff. The filenames of this folder are abas.txt, 1fgh.txt, 3ghl.txt. Based on the input file, I would like to create and rename the multiple copies in ff folder.

For example in the input file, abas has three copies. In the ff folder, I need to create the three copies of abas.txt and rename it as abas_1.txt, abas_2.txt, abas_3.txt. No need to copy and rename 1fgh.txt in ff folder.

Your valuable suggestions would be appreciated.

Upvotes: 2

Views: 130

Answers (4)

yejinxin
yejinxin

Reputation: 596

If you could change the format of input.txt, I suggest you adjust it in order to make your task easier. If not, here is my solution:

#!/bin/bash
SRC_DIR=/path/to/ff
INPUT=/path/to/input.txt
BACKUP_DIR=/path/to/backup
for cand in `ls $SRC_DIR`; do
    grep "^${cand%.*}_" $INPUT | while read new
    do
        cp -fv $SRC_DIR/$cand $BACKUP_DIR/$new
    done
done

Upvotes: 0

rpax
rpax

Reputation: 4496

Try this one

#!/bin/bash
while read newFileName;do
    #split the string by _ delimiter
    arr=(${newFileName//_/ })
    extension="${newFileName##*.}"
    fileToCopy="${arr[0]}.$extension"
    #check for empty : '1fgh.txt' case
    if [ -n "${arr[1]}" ]; then
        #check if file exists
        if [ -f $fileToCopy ];then
           echo "copying $fileToCopy -> $newFileName"
           cp "$fileToCopy" "$newFileName"
        #else
        #   echo "File $fileToCopy does not exist, so it can't be copied"
        fi
    fi  
done

You can call your script like this:

cat input.txt | ./script.sh

Upvotes: 0

gniourf_gniourf
gniourf_gniourf

Reputation: 46873

You can try something like this (to be run from within your folder ff):

#!/bin/bash

while IFS= read -r fn; do
    [[ $fn =~ ^(.+)_[[:digit:]]+\.([^\.]+)$ ]] || continue
    fn_orig=${BASH_REMATCH[1]}.${BASH_REMATCH[2]}
    echo cp -nv -- "$fn_orig" "$fn"
done < input.txt

Remove the echo if you're happy with it.

If you don't want to run from within the folder ff, just replace the line

echo cp -nv -- "$fn_orig" "$fn"

with

echo cp -nv -- "ff/$fn_orig" "ff/$fn"

The -n option to cp so as to not overwrite existing files, and the -v option to be verbose. The -- tells cp that there are no more options beyond this point, so that it will not be confused if one of the files starts with a hyphen.

Upvotes: 1

Farvardin
Farvardin

Reputation: 5424

using for and grep :

#!/bin/bash

for i in $(ls)
do
  x=$(echo $i | sed 's/^\(.*\)\..*/\1/')"_"
  for j in $(grep $x in)
  do
    cp -n $i $j
  done
done

Upvotes: 0

Related Questions