From 8ab3d786bbb9365b50c0a20a9009037c532d5eec Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Fri, 15 Jun 2018 00:47:50 -0400
Subject: bin/xsession: Warn about other sessions on shutdown/reboot

---
diff --git a/bin/xsession b/bin/xsession
index 3b1cf86..9b985f6 100755
--- a/bin/xsession
+++ b/bin/xsession
@@ -3,6 +3,22 @@
 set -eu
 
 actions_icons='/usr/share/icons/gnome/16x16/actions'
+awk_who_script='
+	BEGIN {
+		display_ere = " [(]" display "[)]$";
+		printed = 0;
+	}
+	{
+		if (!match($0, display_ere)) {
+			if (!printed) {
+				print("\n\nThe following sessions will be " \
+					"hung up:\n");
+				printed = 1;
+			}
+			print("<tt><small>    " $0 "</small></tt>");
+		}
+	}
+	'
 
 do_logout()
 {
@@ -19,7 +35,8 @@ do_shutdown()
 {
 	zenity --question --title='Shut Down' \
 		--window-icon="${actions_icons}/system-shutdown.png" \
-		--text='Are you sure you want to shut down this system?' \
+		--text="Are you sure you want to shut down this system?$(who | \
+			awk -v "display=${DISPLAY}" "${awk_who_script}")" \
 		--ok-label='Shut Down' --cancel-label='Cancel' && \
 		sudo shutdown -hP now
 
@@ -30,7 +47,8 @@ do_reboot()
 {
 	zenity --question --title='Reboot' \
 		--window-icon="${actions_icons}/system-shutdown.png" \
-		--text='Are you sure you want to reboot this system?' \
+		--text="Are you sure you want to reboot this system?$(who | \
+			awk -v "display=${DISPLAY}" "${awk_who_script}")" \
 		--ok-label='Reboot' --cancel-label='Cancel' && \
 		sudo reboot
 
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