From d50c3847192acbb3a5be68b67320fd1819fa81fb Mon Sep 17 00:00:00 2001
From: Silvio Rhatto <rhatto@riseup.net>
Date: Tue, 20 Aug 2024 20:42:16 -0300
Subject: Initial import

---
 vnc | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100755 vnc

(limited to 'vnc')

diff --git a/vnc b/vnc
new file mode 100755
index 0000000..94ce3d6
--- /dev/null
+++ b/vnc
@@ -0,0 +1,80 @@
+#!/bin/bash
+#
+# Wrapper around ssh and vncviewer
+#
+
+# Parameters
+BASENAME="`basename $0`"
+SERVER="$1"
+LOCALPORT="${2:-5901}"
+REMOTEPORT="${3:-5901}"
+
+# Clipboard options
+# In practice, clipboard limitations are not working as expected
+# So please do not use this script if you don't want to automatically share clipboard with the remote system
+# This is probably a bug on xtigervncviewer
+VIEWER_OPTS="-AcceptClipboard=off -SendClipboard=off -SetPrimary=off -SendPrimary=off"
+
+function usage {
+  echo "usage: $BASENAME <server> [localport] [remoteport]"
+  cat <<EOF
+
+setup instructions
+==================
+
+* in the remote:
+
+  sudo apt install tigervnc-standalone-server # install in the remote server
+  vncpasswd                                   # generate a ~/.vnc/passwd in the remote server
+
+* in the local box:
+
+  scp <server>:~/.vnc/passwd ~/.vnc/<server>.passwd # copy the secret
+  $BASENAME <server>                                      # use our magic script to do everything else
+
+EOF
+
+  exit 1
+}
+
+# Usage
+if [ "$1" == "--help" ]; then
+  usage
+fi
+
+# Check
+if [ -z "$SERVER" ]; then
+  if [ -h "$HOME/.vnc/default.passwd" ]; then
+    SERVER="$(basename `readlink $HOME/.vnc/default.passwd` .passwd)"
+  else
+    usage
+  fi
+fi
+
+# Check if vncserver is running in the remote server and start otherwise
+ssh $SERVER <<EOF
+  HOSTNAME="\$(cat /etc/hostname)"
+
+  if [ -e "\$HOME/.vnc/\$HOSTNAME:1.pid" ]; then
+    PID="\$(cat \$HOME/.vnc/\$HOSTNAME:1.pid)"
+
+    if ! ps \$PID &> /dev/null; then
+      /usr/bin/vncserver -alwaysshared -dpi 96 -localhost :1
+    fi
+  else
+    /usr/bin/vncserver -alwaysshared -dpi 96 -localhost :1
+  fi
+EOF
+
+# See http://www.g-loaded.eu/2006/11/24/auto-closing-ssh-tunnels/
+# Optional SSH compression
+#ssh -C -c blowfish -f -L 5901:127.0.0.1:5901 $SERVER sleep 10
+ssh -f -L $LOCALPORT:127.0.0.1:$REMOTEPORT $SERVER sleep 10
+
+# Run VNC client
+# Copy $SERVER:~/.vnc/passwd into $HOME/.vnc/$SERVER.passwd for passwordless login
+if [ -e "$HOME/.vnc/$SERVER.passwd" ]; then
+  vncviewer $VIEWER_OPTS -passwd $HOME/.vnc/$SERVER.passwd localhost:$LOCALPORT
+else
+  vncviewer $VIEWER_OPTS localhost:$LOCALPORT
+fi
-- 
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