#!/bin/sh
#
# Initializes the ssh-agent
#

# Parameters
SSH_AGENT=/usr/bin/ssh-agent
SSH_AGENT_ARGS="-s"
SSH_ENV="$HOME/.ssh/environment"

# Start agent, old implementation
#ssh_agent_eval_run() {
#  eval `$SSH_AGENT $SSH_AGENT_ARGS` &> /dev/null
#  trap "ps $SSH_AGENT_PID &> /dev/null && kill $SSH_AGENT_PID" 0
#}

# Start agent, new implementation
# Check http://mah.everybody.org/docs/ssh
start_agent() {
  echo "" > "${SSH_ENV}"
  chmod 600 "${SSH_ENV}"

  echo -n "Initialising new SSH agent..."
  ${SSH_AGENT} ${SSH_AGENT_ARGS} | sed 's/^echo/#echo/' >> "${SSH_ENV}"
  echo succeeded

  . "${SSH_ENV}" > /dev/null
  /usr/bin/ssh-add;

  if [ -x "/usr/bin/monkeysphere" ]; then
    /usr/bin/monkeysphere subkey-to-ssh-agent
  fi
}

# Old implementation
#if [ "$1" == "-f" ]; then
#  echo "Starting a new ssh-agent..."
#  ssh_agent_eval_run
#elif [ -z "$SSH_AUTH_SOCK" -a -x "$SSH_AGENT" ]; then
#  ssh_agent_eval_run
#fi

# New implementation
# Check http://mah.everybody.org/docs/ssh
if [ -f "${SSH_ENV}" ]; then
  . "${SSH_ENV}" > /dev/null
  #ps ${SSH_AGENT_PID} doesn't work under cywgin
  ps -ef | grep ${SSH_AGENT_PID} | grep ssh-agent$ > /dev/null || {
    start_agent;
  }
else
  start_agent;
fi