write shell script to rename file

Shell Programming and Scripting
1

hi,
I need some help in writing shell script in a bourne shell.I am trying to rename the file..
eg.

find /root/data -type f -name "text*) | while read FILES
do
  newfile=${FILES/type_2.0_20101208_34.xml / tmp.xml}
  mv "$FILES" "$newfile"
done

above written script is working...If the name of my file is changed into type_2.0_20101208_35.xml so i have to write this filename in script.Every time when file name is change i have to change the the file name in script..But i do not want to editing in script to change the name of file..so what i write in place of type_2.0_20101208_34.xml in code..
Please help me to overcome this problem,...

2

Have a counter defined and call it in the variable newfile

count=0
find /root/data -type f -name "text*" | while read FILES
do
	count=$(( ${count} +1 )) # shorter one (( count += 1 ))
	newfile=${FILES/type_2.0_20101208_${count}.xml/tmp.xml}
	mv "$FILES" "$newfile"
done

However i believe type_2.0_20101208_34.xml is directory in this case (FILES/type_2.0_20101208_34.xml/tmp.xml)

3

Thanks..I tried to run this code but i found error in mv command like
mv:can not stat `:no such file or directory

one thing i write to forget i have to also change the date with number.It means if the name of the file is type_2.0_20101208_34. if any modification is done in this file then next time this file is saved named as type_2.0_20101209_35.

4

As stated earlier, every time it loops through the while condition the move command checks for the sub-directory FILES/type_2.0_20101208_* and copies the file to tmp.xml, since you have given the path as FILES/type_2.0_20101208_${count}.xml/tmp.xml. So unless you have the sub-directory type_2.0_20101208_* created under directory FILES you will have this error.
Guess you are aware of the directory-tree structure, where except tmp.xml all the others are directories and sub-directories here..FILES/type_2.0_20101208_${count}.xml/tmp.xml

1 Like
5

how to overcome this type of error.

6

It depends upon your requirement. Wot exactly your trying to do.. i mean from where to where your trying to move the files and wot is the destination file name for the move command. Is it always tmp.xml? Brief the requirements.

7

FROMDIR=/root/test/data
TODIR=/root/test/data1

data directory contains file tmp_2.0_20101208_34.xml and data1 contains file tmp.xml.I want to move tmp_2.0_20101208_34.xml file into data1 folder and after that its name replace with tmp.xml because other application using this tmp.xml.If user do any modification in this tmp_2.0_20101208_34.xml file than he save the name of the file as tmp_2.0_20101209_35.xml again this file is moved in data1 folder and name changed as tmp.xml.Destination file name is always tmp.xml

8

Try if the below code helps. Before running this script create a empty file in name prev_file.txt in the location where this script is placed.

#!/bin/ksh
# Saving as move_file.sh

FROMDIR=/root/test/data
TODIR=/root/test/data1
PREV_FILENAME=$(sed '1!d' prev_file.txt) # get the 1st line of the prev_file.txt
CUR_FILENAME=$(ls -tr /root/test/data/tmp_2.0*.xml | tail -1) # get the latest tmp_2.0* file

if [ "${PREV_FILENAME}" != "${CUR_FILENAME}" ] # move if previous and latest file are not the same. If not same the user has changed the file
then
	mv ${FROMDIR}/${CUR_FILENAME} ${TODIR}/tmp.xml 2>error_file.txt
	echo "Moved ${FILENAME} to tmp.xml"
	echo "${CUR_FILENAME}" > prev_file.txt # store current file name in a file to check if the same file exits in the next consecutive run
else
        echo "File not changed by the user"
fi
1 Like