From 5234eacb3058cd509800c4b504bc41038564549b Mon Sep 17 00:00:00 2001
From: paukstelis <paukstel@umd.edu>
Date: Wed, 7 Jul 2021 11:59:44 -0400
Subject: [PATCH] Add just udev entry detection script

---
 printer_udev.sh | 101 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100755 printer_udev.sh

diff --git a/printer_udev.sh b/printer_udev.sh
new file mode 100755
index 0000000..ca0f604
--- /dev/null
+++ b/printer_udev.sh
@@ -0,0 +1,101 @@
+#!/bin/bash
+
+if (( $EUID != 0 )); then
+    echo "Please run as root (sudo)"
+    exit
+fi
+
+
+# from stackoverflow.com/questions/3231804
+prompt_confirm() { 
+  while true; do
+    read -r -n 1 -p "${1:-Continue?} [y/n]: " REPLY
+    case $REPLY in
+      [yY]) echo ; return 0 ;;
+      [nN]) echo ; return 1 ;;
+      *) printf " \033[31m %s \n\033[0m" "invalid input"
+    esac 
+  done  
+}
+# from unix.stackexchange.com/questions/391293
+log () {
+    if [ -z "$1" ]; then
+        cat
+    else
+        printf '%s\n' "$@" 
+    fi | tee -a "$logfile"
+}
+
+# initiate logging
+logfile='printer_udev.log'  
+echo "$(date) starting instance installation" >> $logfile
+
+
+echo "UNPLUG PRINTER YOU ARE INSTALLING NOW (other printers can remain)"
+echo "Enter the name for new printer/instance (no spaces):"
+read INSTANCE
+if [ -z "$INSTANCE" ]; then
+    echo "No instance given. Exiting" | log
+    exit 1
+fi
+
+
+if prompt_confirm "Begin auto-detect printer serial number for udev entry?"
+   then
+   echo
+   #clear out journalctl - probably a better way to do this
+   journalctl --rotate > /dev/null 2>&1
+   journalctl --vacuum-time=1seconds > /dev/null 2>&1
+   echo "Plug your printer in via USB now (detection time-out in 1 min)"
+   counter=0
+   while [[ -z "$UDEV" ]] && [[ $counter -lt 30 ]]; do 
+      UDEV=$(timeout 1s journalctl -kf | sed -n -e 's/^.*SerialNumber: //p')
+      TEMPUSB=$(timeout 1s journalctl -kf | sed -n -e 's/^.*\(cdc_acm\|ftdi_sio\|ch341\) \([0-9].*[0-9]\): \(tty.*\|FTD.*\|ch341-uart.*\).*/\2/p')   
+      counter=$(( $counter + 1 ))
+   done
+else
+   echo "OK. Restart when you are ready" | log; exit 0
+fi
+
+
+if [ -z "$UDEV" ]; then
+   echo "Printer Serial Number not detected"
+   prompt_confirm "Do you want to use the physical USB port to assign the udev entry? If you use this any USB hubs and printers detected this way must stay plugged into the same USB positions on your machine as they are right now" || exit 0
+   #if [[ $REPLY =~ ^[Yy]$ ]]; then
+   echo
+   USB=$TEMPUSB
+   echo "Your printer will be setup at the following usb address:"
+   echo $USB | log
+   echo    
+else
+   echo "Serial number detected as: $UDEV" | log
+fi
+
+echo
+
+
+if prompt_confirm "Ready to write udev entry. Do you want to proceed?" 
+then
+   #Printer udev identifier technique - either Serial number or USB port
+   #Serial Number
+   if [ -n "$UDEV" ]; then
+      #echo $UDEV
+      echo SUBSYSTEM==\"tty\", ATTRS{serial}==\"$UDEV\", SYMLINK+=\"octo_$INSTANCE\" >> /etc/udev/rules.d/99-octoprint.rules
+      echo This printer can now always be found at /dev/octo_$INSTANCE
+   fi
+   
+   #USB port
+   if [ -n "$USB" ]; then
+      #echo $USB
+      echo KERNELS==\"$USB\",SUBSYSTEM==\"tty\",SYMLINK+=\"octo_$INSTANCE\" >> /etc/udev/rules.d/99-octoprint.rules
+      echo This printer can now always be found at /dev/octo_$INSTANCE
+   fi
+
+   #Reset udev
+   udevadm control --reload-rules
+   udevadm trigger
+   systemctl daemon-reload
+   sleep 1
+ 
+fi
+