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erez	24th May 2006 15:48

Need help for writing shell script

I need some help in writing a shell script, it basically need to delete all my older files , the file name structure is like that :

song100000732200506114828.3gp
song100000732200506124528.3gp
song100000732200506214528.3gp
.....................
.....

· song – constant prefix.
· 100000732 – 9 digits unique key [per msisdn]
· 200506114528 – time stamp [DDMMYYHHMISS format]

The unique key is the same for each play list of specific msisdn.
The only thing that changes is the timestamp.

so i need for each unique key (there are more then one) the news file will remain

Can anyone help me?

thanks

EvanCarroll

11th June 2006 09:40

Quote:

Originally Posted by erez

Do you need it in shell? Or can it be scripted in a real language.

erez	15th June 2006 17:11

i need it in a shell

g33k	16th June 2006 05:51

>> so i need for each unique key (there are more then one) the news file will remain

I don't get what exactly you want to do..May be you could have been more clear !!

Well the following script extracts each field (key and date-time) from the file name..

Code:

#!/bin/bash

ext=".3gp"        #put the file extension here



for f in *.3gp        #repeats of for each file in the directory        

do

        #extract the filename without extension

        base=`basename $f $ext`

        echo $base

        

        #extract the prefix

        pref=`echo $base | cut -c 5-13 -`

        echo $pref



        #extract date and time

        dtime=`echo $base | cut -c 14-25 -`

        echo $dtime

done

flim	16th June 2006 14:23

Quote:

Originally Posted by erez

I assume you want to remove unused stuff older than X days. Instead of checking the timestamp within the filenames you could just do something like this:

find /my/directory -name song*3gp -ctime 50 -print| rm -f

which would delete everything min 50 days old

You can test that it picks the right files with something like:
find /my/directory -name song*3gp -ctime 50 -print| ls -l

Cheers
flim

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