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Top Forums Shell Programming and Scripting Why does my script not work? (Noob Alert) Post 302169415 by bronkeydain on Thursday 21st of February 2008 07:56:53 AM
Old 02-21-2008
Why does my script not work? (Noob Alert)

I am a scripting noob and I have tried to search on google, but cannot find the answer as to why this script doesn't work properly.

The idea of this script is that it will list all files starting with f in a certain folder, and delete all but the three newest one. I am trying to achieve this by doing command "ls -t" so the newest come out on top. Then I simply skip the first 3 and start deleting what comes after (in the supplied script I am just renaming the files). For some reason when the counter hits 10, it seems to think that it a smaller value than 3. I think it only sees the 1st character of 10, leading it to think its value is 1? Yet when I echo $counter, it says 10?

I am sure you are going to slap me around the ears with one-line scripts that do the job, but as I am trying to learn I would really like to see why mine does not work as well. I really do apreciate any kind of input. Thanks in advance.

My script:

#!/bin/bash
declare -i counter=1
for file in $(ls -t f*); do
if [[ $counter > 3 ]]; then
mv $file $file.del
fi
let counter=$counter+1
done
exit 0
 

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SHUNIT2(1)																SHUNIT2(1)

NAME
shunit2 - A unit test framework for shell scripts SYNOPSIS
shunit2 unitfile DESCRIPTION
shUnit2 is a xUnit unit test framework for Bourne based shell scripts, and it is designed to work in a similar manner to JUnit, PyUnit, etc.. If you have ever had the desire to write a unit test for a shell script, shUnit2 can do the job. You can either run shunit2 directly from the commandline and specify the unit file or directly source the shunit2 executable. If you directly execute shunit2 and don't specify a unitfile shunit2 assumes a empty testfile and will return without an error message. EXAMPLE
Simple script to test if 1 equals 1 #! /bin/sh testEquality() { assertEquals 1 1 } # load shunit2 . shunit2 Execute shUnit2 unit tests directly from the commandline shunit2 /path/to/unit/file OPTIONS
shunit2 does not support any commandline options at all. You can either source shunit2 to execute your unit tests or directly run shunit2 as a commandline script. SEE ALSO
For more information see http://code.google.com/p/shunit2/ or have a look at the installed documentation in /usr/share/doc/shunit2/ AUTHOR
shunit2 was written by Kate Ward <kate.ward@forestent.com>. This manpage was written by Ulrich Dangel <mru@spamt.net>. 2.1.6 03/25/2012 SHUNIT2(1)
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