#!/bin/sh

GPG_AGENT=/usr/bin/gpg-agent

## Run gpg-agent only if not already running, and available

if [ -z "${GPG_AGENT_INFO}" -a -x "${GPG_AGENT}" ] ; then

  # check validity of GPG_SOCKET (in case of session crash)

  GPG_AGENT_INFO_FILE=${HOME}/.gpg-agent-info

  if [ -f "${GPG_AGENT_INFO_FILE}" ]; then

    GPG_SOCKET=$(cat "${GPG_AGENT_INFO_FILE}" | cut -f1 -d:)

    if ! test -S "${GPG_SOCKET}" -a -O "${GPG_SOCKET}" ; then

      rm -f "${GPG_AGENT_INFO_FILE}" 2>&1 >/dev/null

    fi

  fi

  if [ -f "${GPG_AGENT_INFO_FILE}" ]; then

    export GPG_AGENT_INFO=$(cat "${GPG_AGENT_INFO_FILE}")

    export GPG_TTY=$(tty)

  else

    eval "$(${GPG_AGENT} -s --daemon ${GPG_OPTIONS})"

    echo ${GPG_AGENT_INFO} > "${HOME}/.gpg-agent-info"

  fi

fi