gnupg2/gpg-agent-startup.sh

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#!/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)
if [ -f ${HOME}/.gpg-agent-info ]; then
GPG_SOCKET=$(cat .gpg-agent-info |cut -f1 -d:)
if ! test -S "${GPG_SOCKET}" -o ! -O "${GPG_SOCKET}" ; then
rm -f ${HOME}/.gpg-agent-info 2>&1 >/dev/null
fi
fi
if [ -f ${HOME}/.gpg-agent-info ]; then
export GPG_AGENT_INFO=$(cat ${HOME}/.gpg-agent-info)
export GPG_TTY=$(tty)
else
eval "$(${GPG_AGENT} -s --daemon ${GPG_OPTIONS})"
echo ${GPG_AGENT_INFO} > "${HOME}/.gpg-agent-info"
fi
fi