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|
#!/usr/bin/env bash
#
# Intersystem communication via clipboard over SSH!
# Transmits data using the clipboard via SSH session.
#
# Description:
#
# xclip-ssh does what the same says - xclip over SSH.
# Works even with a remote host in a .onion service!
# And even between virtual machines!
#
# Works around the following PoC:
#
# ssh -X <server> # log in the remote system
# DISPLAY=:0 xclip -o # extracts remote's clipboard
#
# Usage:
#
# xclip-ssh send <server> [stdin|data]
# xclip-ssh receive <server> [stdout|xclip]
#
# Examples:
#
# cat /path/to/file | xclip-ssh send server
# xclip-ssh send server "some text"
# xclip-ssh receive server stdout > saved.txt
# Parameters
BASENAME="`basename $0`"
ACTION="$1"
SERVER="$2"
STORE="$3"
# Display usage
function xclip_ssh_usage {
echo "usage: $BASENAME <send|receive> <server> [data]"
exit 1
}
# Send data
function xclip_ssh_send {
if [ -z "$STORE" ]; then
STORE="xclip"
fi
if [ "$STORE" == "xclip" ]; then
CONTENT="`xclip -o`"
elif [ "$STORE" == "stdin" ]; then
mapfile -t CONTENT
#printf '%s\n' "${CONTENT[@]}"
else
shift 2
CONTENT="$*"
fi
# See https://askubuntu.com/questions/804095/how-do-i-disable-the-message-of-the-day-motd-on-ubuntu-14-04
ssh -q -X $SERVER bash <<EOF
##### BEGIN REMOTE SCRIPT #####
if ! which xclip &> /dev/null; then
echo "$BASENAME: missing xclip in the remote server"
else
echo ${CONTENT[@]} | DISPLAY=:0 xclip
fi
##### END REMOTE SCRIPT #######
EOF
}
# Receive data helper
function xclip_ssh_helper {
ssh -q -X $SERVER bash <<EOF
##### BEGIN REMOTE SCRIPT #####
if ! which xclip &> /dev/null; then
echo "$BASENAME: missing xclip in the remote server"
else
DISPLAY=:0 xclip -o
fi
##### END REMOTE SCRIPT #######
EOF
}
# Receive data
function xclip_ssh_receive {
if [ -z "$STORE" ]; then
STORE="xclip"
fi
if [ "$STORE" == "stdout" ]; then
xclip_ssh_helper
echo ""
else
xclip_ssh_helper | xclip -i
fi
}
# Check
if [ -z "$2" ]; then
xclip_ssh_usage
elif [ "$ACTION" != "send" ] && [ "$ACTION" != "receive" ]; then
xclip_ssh_usage
elif ! which xclip &> /dev/null; then
echo "$BASENAME: please install xclip"
exit 1
fi
# Dispatch
xclip_ssh_$ACTION $*
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