guessing GPG_AGENT_INFO

[Werner Koch]

On Mon, 29 Sep 2008 22:17, nicholas.cole at gmail.com said:

> Is there any way to correctly 'guess' the settings for the
> GPG_AGENT_INFO variable (for the case where gpg-agent has been called
> with --use-standard-socket)?

That is easy.  With --use-standard-socket the socket used is

  ~/.gnupg/S.gpg-agent

unless GNUPGHOME is set in which case it is

  ${GNUPGHOME}/S.gpg-agent

The environment variable you want is thus

  GPG_AGENT_INFO="${GNUPGHOME:-${HOME}/.gnupg}/S.gpg-agent:-1:1"

We do not actually need the PID, thus we set it to -1.  The trraling 1
is the protocol version (not checked, iirc).

If you don't use --use-standard-socket you can try to write a scripts
based on

  netstat -lx | awk '/\/S.gpg-agent$/ { print $8 }'

but you need to figure out whether this is the socket for the desired
user.  Maybe -lxp would be helpful.


Salam-Shalom,

   Werner


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