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#!/bin/bash
set -e
# --------------------------------------------------------------
# A script for starting SSH SOCKS proxy and ecFlow UI as another user.
# Prerequisites:
#   * User named "myecuser" must exist on the laptop
#   * "myecuser" has set up their Teleport client to access ECMWF.
# --------------------------------------------------------------

ECMWF_USER=myecuser              # your ECMWF username
ECMWF_HOST=myecworkstation       # your ECMWF workstation name

xhost + || :
sudo -i -u "$ECMWF_USER" -- sh << SUDO

    set -e

    # Starting ssh-agent for $ECMWF_USER.
    # Teleport service requires ssh-agent running.

    ssh-agent -- sh << SSH_AGENT

        set -e

        # "tsh login" will fetch SSH certificate from
        # shell.ecmwf.int and load it onto the ssh-agent.

        tsh login -d

        # "ssh -f" will start SSH tunnel in the background.
        # The trap will terminate the tunnel on exit.

        trap 'pkill -f ssh.*-f' 0 1 2 3 15
        ssh -f -N -v -C -D9050 -J "$ECMWF_USER@shell.ecmwf.int" "$ECMWF_USER@$ECMWF_HOST"

        # finally, start the local ecFlow UI
        /Volumes/Macintosh\ HD/opt/miniconda3/bin/ecflow_ui
SUDO
SSH_AGENT
SUDO