#!/bin/bash
# Launch the ssh-agent from a service so it survives logoff.

# Where are we?
host=$(uname -n)

# When the service stops, kill the ssh-agent.
trap "rm -f ~/.keychain/${host}-svc;
  rm -f ~/.keychain/${host}.bat;
  keychain --quiet --stop;
  exit 0" TERM

# Launch the ssh-agent.
keychain --quiet

# If keychain was successful then...
if [ -e ~/.keychain/${host}-sh ]; then
  # Create a ".bat" file for use in Windows command shells.
  : > ~/.keychain/${host}.bat && \
  chmod 0600 ~/.keychain/${host}.bat && \
  cat ~/.keychain/${host}-sh | sed -e 's/;.*//' -e 's/^/@set /' >> 
~/.keychain/${host}.bat

  # Show the service as available.
  : > ~/.keychain/${host}-svc && \
  chmod 0600 ~/.keychain/${host}-svc && \
  echo $$ >> ~/.keychain/${host}-svc
fi

# Wait quietly until the service is stopped.
while true; do
  sleep 24h &
  wait
done