Re: Unix scripting need help

From: Steven Lembark <lembark_at_wrkhors.com>
Date: Mon, 26 Aug 2002 05:58:23 -0800
Message-ID: <F001.004BF81A.20020826055823@fatcity.com>

> For example, my files are like these
>
> mylogfile001.log
> mylogfile002.log
>
> I want to initialize my variables with those number, like this
>
> i=1
> for all_file in `ls -1 /tmp`
> do
>
> file$i=all_file
> i=i+1
> done
>
> file_tag1=`unix_command $file1 ` <--- help me here
>
> when I do
>
> echo $file_tag1
>
> it should give me 001

Is your purpose to simply display the numbers or to generate the maximum in order to start naming new files?

If the latter seriously consider using a timestamp:

    i=$(date +%Y%m%d%H%M%S);

this solves all of the math for you automaticlly. A onesecond  sleep at the start of your program guarantees that you will not re-use the names.

To get the digit strings out you could use sed or perl:

    i=$( echo $file | sed -e 's/[^0-9]*//g' )

or use perl for the code instead of shell:

    for( @ARGV )
    {

        my ($i ) = /(\d+)/;
        Print "File and number: $_, $i\n";

    }

--
Steven Lembark                               2930 W. Palmer
Workhorse Computing                       Chicago, IL 60647
                                            +1 800 762 1582
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Author: Steven Lembark
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Received on Mon Aug 26 2002 - 08:58:23 CDT