From 9855095294227cc798d4808001c53d4e1bb69e71 Mon Sep 17 00:00:00 2001
From: Uwe Hennig <uhi@hnng.de>
Date: Mon, 15 May 2023 08:26:55 +0200
Subject: [PATCH] feature: automatic path name in sharter.sh

---
 starter.sh | 26 +++++++++++++++-----------
 1 file changed, 15 insertions(+), 11 deletions(-)

diff --git a/starter.sh b/starter.sh
index 07273e3..ee38ce4 100755
--- a/starter.sh
+++ b/starter.sh
@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# enter in the pyPLC directory, so that all subsequent pathes can be relative to this.
+cd "$( dirname "${BASH_SOURCE[0]}" )"
+
 # Function to start tcpdump
 start_tcpdump() {
     INTERFACE="eth0"  # Change this to the interface you want to monitor
@@ -24,7 +27,7 @@ signal_handler() {
 # Set trap for signals: SIGINT (2), SIGTERM (15)
 trap 'signal_handler' 2 15
 
-# Todo: explain this
+#  Set options for the bash: exit on error, treat unused variables as error, print the input as it is read.
 set -euv
 
 # Keep all IPv6 addresses on the interface down event.
@@ -35,6 +38,7 @@ sysctl net.ipv6.conf.eth0.keep_addr_on_down=1
 # Shut down and activate the interface.
 # Todo: Why this needed? On raspberry, where the NetworkManager is not runnning, this disturbs, because
 # afterwards the pyPlc does not see the interfaces IPv6 address.
+# Todo: make this configurable, for the cases we need this.
 # ip link set eth0 down
 sleep 1
 # ip link set eth0 up
@@ -43,12 +47,15 @@ sleep 1
 # show the addresses
 ip addr
 
-# todo: flexible path name
-mkdir -p /home/pi/myprogs/pyPLC/log
+# print the current directory to log. Should be the pyPLC directory.
+pwd
+
+# create directory for the log files.
+mkdir -p log
 # prepare the file names for the log files
 date=$(date "+%Y-%m-%d_%H%M%S")
-logfile=/home/pi/myprogs/pyPLC/log/"$date"_pevNoGui.log
-tcpdump_logfile=/home/pi/myprogs/pyPLC/log/"$date"_tcpdump.pcap
+logfile=./log/"$date"_pevNoGui.log
+tcpdump_logfile=./log/"$date"_tcpdump.pcap
 
 echo "logfile: $logfile"
 echo "tcpdump_logfile: $tcpdump_logfile"
@@ -60,12 +67,9 @@ echo "$date" >> "$logfile"
 git log --oneline -1 >> "$logfile" || echo "Not a git repo" >> "$logfile"
 ip addr >> "$logfile"
 pwd >> "$logfile"
-# Todo: flexible path name
-cd /home/pi/myprogs/pyPLC/
-#/usr/bin/python3 /home/user/projects/pyPLC/pevNoGui.py | tee -a "$logfile"
-#stdbuf -oL -eL /usr/bin/python3 /home/user/projects/pyPLC/pevNoGui.py | tee -a "$logfile"
-#PYTHONUNBUFFERED=1 /usr/bin/python3 /home/user/projects/pyPLC/pevNoGui.py | stdbuf -oL -eL tee -a "$logfile"
-PYTHONUNBUFFERED=1 /usr/bin/python3 /home/pi/myprogs/pyPLC/pevNoGui.py | tee -a "$logfile"
+
+# call the pyPlc python script
+PYTHONUNBUFFERED=1 /usr/bin/python3 pevNoGui.py | tee -a "$logfile"
 pwd >> "$logfile"
 date >> "$logfile"