Insert date/time within a filename - UNIX for Dummies Questions & Answers

cooperman · #1 11-07-2005

Hi Guys,

I need to script the renaming of files as followins:

files:

firstjd
secondjo
thirdjv

My script needs to insert the date/time infront of the last 2 characters of the filenames above, any ideas greatly received

the letters before the last 2 characters could change, I'm only interested in inserting date/time in front of the last 2 characters, whatever they maybe.

Many thanks

vino · #2 11-07-2005

Check this out.

Code:

#! /bin/sh

for FILE in firstjd secondjo thirdjv
do
        NAME_LEN=${#FILE}
        FILE_END=${FILE:$NAME_LEN-2:$NAME_LEN}
        FILE_START=${FILE%$FILE_END}
        NEW_NAME=$FILE_START$(date +%s)$FILE_END

        mv $FILE $NEW_NAME
done

Edit: You might want to look into man date for other possible output formats of date.

vino

cooperman · #3 11-07-2005

Thanks for that Vino, BUT

I get the following error:

`NEW_NAME=$FILE_START$' unexpected

any ideas ?

thanks again

vgersh99 · #4 11-07-2005

Code:

#!/bin/ksh

for iter in  firstjd secondjo thirdjv
do
   _time=$(date +%Y%m%d-%H%M%S)
   new=$(echo ${iter} | sed "s/\(.*\)\(..\)/\1${_time}\2/")
   echo "old->[${iter}] new->[${new}]"
done

vino · #5 11-07-2005

Quote:

Originally Posted by cooperman

Thanks for that Vino, BUT

I get the following error:

`NEW_NAME=$FILE_START$' unexpected

any ideas ?

thanks again

This ?

Code:

NEW_NAME=${FILE_START}$(date +%s)${FILE_END}

vino · #6 11-07-2005

Quote:

Originally Posted by vgersh99

Code:

#!/bin/ksh

for iter in  firstjd secondjo thirdjv
do
   _time=$(date +%Y%m%d-%H%M%S)
   new=$(echo ${iter} | sed "s/\(.*\)\(..\)/\1${_time}\2/")
   echo "old->[${iter}] new->[${new}]"
done

Oh well, a sed solution will work as well.

I was trying to avoid an external call.

Cheers' !

vgersh99 · #7 11-07-2005

here's a "pure" ksh:

Code:

#!/bin/ksh

for iter in  firstjd secondjo thirdjv
do
   _time=$(date +%Y%m%d-%H%M%S)
   root="${iter%%??}"
   suf="${iter##${root}}"
   echo "old->[${iter}] new->[${root}${_time}${suf}]"
done

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