Hello Community,

I would like to have your inputs on the following script logic.

So we have a script which upgrades (in terms of RPMs) depending on the customised OS version.

So we have these versions in place --- 1.1.5,1.1.8,1.2.1,1.2.2

Now we have a small script written for updated from 1.1.5 to 1.1.8. So this script checks the third octet(to say) and then does the required job.
Now we have to modify this script to go for a change in 2nd and 3rd octet as well. So the script should handle the upgrade of 1.1.5 to 1.2.2.
So the logic had to be modified. So far we have used the following logic.

for (( j=`expr $installed_ver + 1`; j<=$target_ver; j++ ))
do
for k in $list_of_reqd_RPMs_to_install
do
if [ $j -lt $target_ver_nr ]; then
rpm -ivh $k

fi
done
done

Now the above script handles the upgrade from 1.1.5-> 1.1.8 but not 1.2.2.
Your inputs in this case will help.
Thanx.

There are not three decimal places in math. I'm surprised your script works at all. You should probably rewrite your script in a slightly more robust language so that you can better process the version numbers easier. You should process the version numbers as strings and split them up to do the comparisons. That's all I have time for.

Good luck.

I am not sure I follow the logic (in general, not the script). Do you require intermediate items to be installed as you go from version to version?

As an example, if current is 1.1.5 and we need to upgrade to 1.2.1, do we need to firstly install all for 1.1.8 prior to installing those for 1.2.1?

If you simply need to install all from the latest version, you could do something like: