blob: 0a4f46cde7252210c758929823806c7d7023bcde (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
#!/bin/bash
# x11vnc option '-noxrecord' added as workaround for crashing bug
# See https://github.com/LibVNC/x11vnc/issues/61
#
# The option is not be needed with latest x11vnc from source, but we don't rely
# on the remote side being up to date.
ssh()
{
command ssh "$@" 2>&1 | sed 's/^/REMOTE> /'
}
direct_connection()
{
port=$((5900 + ${local_display#*:}))
ssh -o ControlPath=none -n \
-L $port:localhost:$port \
${remote_port:+-p $remote_port} \
"$remote_host" \
"x11vnc -noxrecord -nopw -ncache -ncache_cr -localhost -display ${remote_display}" &
pid=$!
sleep 1 # surrender race
xvncviewer -encodings "copyrect tight zrle hextile" localhost:0
kill $pid
}
share_display()
{
if [ "$DEBUG" ]
then
set -x
fi
port=5500
while fuser -vk $port/tcp
do
sleep 0.1
done
x11vnc -noxrecord -q -nopw -ncache -ncache_cr -localhost -display "${local_display}" -rfbport "$port" &
X11VNC=$!
trap 'if [ ! "$DEBUG" ]; then exec 2>/dev/null; fi; set -- "$X11VNC" "$SSH"; ps hu "$@"; kill "$@"' EXIT
while ! fuser -v $port/tcp
do
[ -e /proc/"$X11VNC" ] || break
sleep 0.1
done
# TODO: spin waiting for port 5500
ssh -n \
${remote_port:+ -p "$remote_port" } \
"$remote_host" \
"fuser -vk $port/tcp && sleep 1"
ssh -n \
-o ControlPath=none \
-o ExitOnForwardFailure=yes \
-R "localhost:$port:localhost:$port" \
${remote_port:+ -p "$remote_port" } \
"$remote_host" \
"DISPLAY=${remote_display} xvncviewer localhost:$port" 2>&1 &
SSH=$!
wait -n
}
if [ "$1" = -r ]
then
shift
cmd=share_display
elif [ "$1" = -d ]
then
shift
cmd=direct_connection
else
cmd=direct_connection
fi
remote_host=${1:-blackboard}
case "$remote_host" in
*:*) remote_port=${remote_host##*:}
remote_host=${remote_host%:*}
;;
*) remote_port=
;;
esac
remote_display=${2:-:0}
local_display=${3:-:0}
$cmd
|
