From 44e506b3b4c1c3356f3f8c84eafe6b4e41b265e7 Mon Sep 17 00:00:00 2001
From: Andrew Cady <d@jerkface.net>
Date: Thu, 24 Feb 2022 11:41:05 -0500
Subject: Successfully eliminated TCP port on both sides!

This requires relying on xtigervncviewer on the remote side, since only
tiger supports connecting to a unix socket file.

This is for -r only.  The regular connection still uses TCP :(
---
 dot/local/bin/xvnc | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/dot/local/bin/xvnc b/dot/local/bin/xvnc
index 375d13a..7eba3f2 100755
--- a/dot/local/bin/xvnc
+++ b/dot/local/bin/xvnc
@@ -1,4 +1,6 @@
 #!/bin/bash
+set -e
+set -o pipefail
 
 # x11vnc option '-noxrecord' added as workaround for crashing bug
 # See https://github.com/LibVNC/x11vnc/issues/61
@@ -44,25 +46,23 @@ share_display()
 
     port=5500
     OUR_TMP=$(mktemp -d) || exit
-    socket_file=$OUR_TMP/x11vnc.socket
+    local_socket_file=$OUR_TMP/x11vnc.socket
+    ssh_control=$OUR_TMP/ssh.socket
 
-    # killall x11vnc
-    x11vnc -noxrecord -q -nopw -ncache -ncache_cr -display "${local_display}" -unixsock "$socket_file" &
+    x11vnc -noxrecord -q -nopw -ncache -ncache_cr -display "${local_display}" -unixsock "$local_socket_file" -rfbport 0 &
     X11VNC=$!
     trap atexit EXIT
 
-    # TODO: spin waiting for port 5500
-    ssh -n \
-        ${remote_port:+ -p "$remote_port" } \
-        "$remote_host" \
-        "fuser -vk $port/tcp && sleep 1"
+    rando=$(tr -dc A-Za-z0-9 < /dev/urandom | head -c15) && [ "$rando" ]
+    remote_socket_file=/tmp/xtigervncviewer.$rando.socket
+
     ssh -n \
         -o ControlPath=none \
         -o ExitOnForwardFailure=yes \
-        -R "localhost:$port:$socket_file" \
+        -R "$remote_socket_file:$local_socket_file" \
         ${remote_port:+ -p "$remote_port" } \
         "$remote_host" \
-        "DISPLAY=${remote_display} xvncviewer localhost:$port" 2>&1 &
+        "${DEBUG:+ set -x; } trap 'rm -f $remote_socket_file' EXIT; DISPLAY=$remote_display xtigervncviewer $remote_socket_file" &
     SSH=$!
     wait -n
 }
-- 
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