Update Linbpq with up2bpq

Ok, first of all I want to apologize for my fantastic bash scripting arts. There must be people laughing there ass off.

I was searching the internet for an update program or script for Linbpq. I could not find these, so I started using my bash scripting skills.

Maybe someone has better ideas.

The problem is that John GM8BPQ does not work with version numbers in his program names. This makes it difficult to quickly see if you need to update. Now I always look at the dates, this gave me an idea.

Why not look at the Last_Modified date with a shell script. Now of course you first have to check on your own system which date you have with your most recent Linbpq program file.

[email protected]:~ $ date -d "$( stat /home/pd9q/linbpq/linbpq | awk '/Modify/{gsub( /^[^:]+: +/,"",$0); print}' )"   "+%Y-%m-%d"
2019-09-26

Okay now we have to take a look at John’s date on his web server.

[email protected]:~ $ date -d "$( curl -sI http://www.cantab.net/users/john.wiseman/Downloads/Beta/pilinbpq  | awk '/Last-Modified/{gsub( /^[^:]+: +/,"",$0); print}' )"   "+%Y-%m-%d"
2019-10-05

Now you have two dates, lets compare.

local=$(date -d "$( stat /home/pd9q/linbpq/check/linbpq | awk '/Modify/{gsub( /^[^:]+: +/,"",$0); print}' )"   "+%Y-%m-%d")
remote=$(date -d "$( curl -sI http://www.cantab.net/users/john.wiseman/Downloads/Beta/pilinbpq  | awk '/Last-Modified/{gsub( /^[^:]+: +/,"",$0); print}' )"   "+%Y-%m-%d")
    # Compare the Modified date`s
if (( ${local//-/} < ${remote//-/} ));
then

It should be  “if (( ${local//-/} < ${remote//-/} ));”

The local file is from 2019-09-26 and de remote file is from 2019-10-05
Let get the new Linbpq version from 2019-10-05 and downloading it with a timestamp. I want the timestamp to remain the same, otherwise nothing later can be compared.

wget -N http://www.cantab.net/users/john.wiseman/Downloads/Beta/pilinbpq -P /home/pd9q/linbpq

The -N oprions by the wget command stands for –Timestammping

Now I want to name the file linbpq with the date of the download and copy it to the directory /home/pd9q/linbpq. If you use the -p option with cp the timestamp stays the same. And I also have the file in the /home/pd9q/linbpq/check directory. This is because I need it to compare the dates.

now=$(date "+%Y-%m-%d")
    cp -p /home/pd9q/linbpq/pilinbpq /home/pd9q/linbpq/linbpq-$now
    yes | cp -rfp /home/pd9q/linbpq/pilinbpq /home/pd9q/linbpq/check/linbpq

Let`s remove pilinbpq, we no longer need him. And chmod the linbpq file so we can execute it.

rm -f /home/pd9q/linbpq/pilinbpq
chmod +x /home/pd9q/linbpq/linbpq-$now

I’m using the sed command to alter the linbpq start file.

sed -i "s,sudo -u pd9q ./.*$,sudo -u pd9q ./linbpq-"$now"," /home/pd9q/linbpq/linbpq.start
[email protected]:~ $  grep linbpq-  /home/pd9q/linbpq/linbpq.start
sudo -u pd9q ./linbpq-2019-10-31

That works very well.

Now let’s restart Linbpq with the new version of Linbpq

sudo systemctl restart linbpq

If you now run up2bpq again you will get the following message if the two dates match.

[email protected]:~ $ ./up2bpq
Your version has the same timestamp so your version is up2date
The local linbpq in the /home/pd9q/linbpq/check directory has 2019-10-05 as timestamp.
The remote pilinbpq has 2019-10-05 as timestamp.

Here is the entire script.

#!/bin/bash
#
# Fist make a directory called check in your linbpq directory and made a copy of the linbpq program file to it.
#
    # Lets get the Modify date from linbpq local en pilinbpq remote
local=$(date -d "$( stat /home/pd9q/linbpq/check/linbpq | awk '/Modify/{gsub( /^[^:]+: +/,"",$0); print}' )"   "+%Y-%m-%d")
remote=$(date -d "$( curl -sI http://www.cantab.net/users/john.wiseman/Downloads/Beta/pilinbpq  | awk '/Last-Modified/{gsub( /^[^:]+: +/,"",$0); print}' )"   "+%Y-%m-%d")
    # Compare the Modified date`s
if (( ${local//-/} < ${remote//-/} ));
then
    #
    echo The local file is from $local and de remote file is from $remote
    echo Let get the new Linbpq version from $remote and downloading it with a timestamp.
    #
    wget -N http://www.cantab.net/users/john.wiseman/Downloads/Beta/pilinbpq -P /home/pd9q/linbpq
    #
    echo Let give the file a date.
    echo We are going to copy the file with the same Last_Modified as on the webserver of GM8BPQ.
    echo And we give it the timestamp of downloading. Dont forget to copy it with the -p option.
    #
    now=$(date "+%Y-%m-%d")
    cp -p /home/pd9q/linbpq/pilinbpq /home/pd9q/linbpq/linbpq-$now
    yes | cp -rfp /home/pd9q/linbpq/pilinbpq /home/pd9q/linbpq/check/linbpq
    # Remove pilinbpq
    rm -f /home/pd9q/linbpq/pilinbpq
    chmod +x /home/pd9q/linbpq/linbpq-$now
    # We are going to use the sed command to alter the linbpq start file.
    sed -i "s,sudo -u pd9q ./.*$,sudo -u pd9q ./linbpq-"$now"," /home/pd9q/linbpq/linbpq.start
    echo Lets check "if" its was okay.
    #
    grep linbpq-  /home/pd9q/linbpq/linbpq.start
    #
    echo Now lets start Linbpq with the new version.
    #
    sudo systemctl restart linbpq
else
    echo "Your version has the same timestamp so your version is up2date"
    echo The local linbpq in the /home/pd9q/linbpq/check directory has $local as timestamp.
    echo The remote pilinbpq has $remote as timestamp
fi

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