xrpdevs · July 6, 2021 17:53 · Jul 6, 2021
diff --git a/Barrier b/Barrier
@@ -0,0 +1,61 @@
+#!/bin/sh
+
+## Put this file in /Library/StartupItems/Barrier
+
+. /etc/rc.common
+
+BARRIER="/Library/StartupItems/Barrier/barrierc_prelogin"
+SERVER="192.168.7.101:24800"
+SCREEN_NAME="Jamies-iMac-Pro.local"
+
+cmd="$BARRIER --name $SCREEN_NAME --no-tray -l /tmp/barrier1.log $SERVER"
+
+echo $(date) " " $cmd >>/tmp/barrier2.log
+
+run=($cmd)
+
+KeepAlive ()
+{
+    proc=${1##*/}
+
+        echo "PID: $proc"
+
+    while [ -x "$1" ]
+
+    do
+        echo $(date) " running test" >>/tmp/barrier2.log
+        if ! ps axco command | grep -q "^${proc}\$"; then 
+                if ! ps axco command | grep -q "^barrierc\$"; then
+                           "$@"
+                           echo $(date) " restarting" >>/tmp/barrier2.log
+                else
+                           echo $(date) " not restarting as user barrier process is running" >>/tmp/barrier2.log
+                fi
+        fi
+
+        if [ -f /tmp/barrierc_user_running ]; then
+                echo $(date) " killing root barrierc_prelogin" >>/tmp/barrier2.log
+                killall barrierc_prelogin
+                rm /tmp/barrierc_user_running
+        fi
+        sleep 3
+    done
+}
+
+StartService ()
+{
+    ConsoleMessage "Starting Barrier"
+    KeepAlive "${run[@]}" &
+}
+
+StopService ()
+{
+    return 0
+}
+
+RestartService ()
+{
+    return 0
+}
+
+RunService "$1"
diff --git a/README.TXT b/README.TXT
@@ -0,0 +1,22 @@
+Open "Terminal" and login as root (type sudo su -)
+
+Put the two files "Barrier" and "StartupParameters.plist" in /Library/StartupItems/Barrier/
+create the Barrier directory if needed.
+
+Change BARRIER, SCREEN_NAME and SERVER to suit your setup.
+
+copy the barrierc binary from /Applications/Barrier.app/Contents/MacOS/barrierc to /Library/StartupItems/Barrier/barrierc_prelogin
+
+Create a launchd script which creates the file /tmp/barrierc_user_running when you log in.
+
+Barrier runs as root pre-login, checks for the presence of the "barrierc_user_running" file, and if so, terminates root's copy of
+barrierc (barrierc_prelogin) and deletes that file.
+
+When you log out, your (user) barrierc process stops, and barrierc_prelogin is restarted as root user.
+
+There are probably better ways to do this, I read about logout and login hooks, but their usage is not reccomended by Apple.
+
+You might want to get rid of the logging statements in the script, but the logs will go away on reboot anyways, they are
+just there to help with debugging.
+
+Give me a shout if you have any ideas for improvements.
diff --git a/StartupParameters.plist b/StartupParameters.plist
@@ -0,0 +1,6 @@
+{
+    Description      = "Barrier Client";
+    Provides         = ("Barrier");
+    Requires         = ("Network");
+    OrderPreference  = "None";
+}