[gpg-agent] Empty OPTION xauthority=

[mcepl at cepl.eu]

Hello,

I am running MicroOS-based distro (which means read-only host and all 
work done in podman containers using distrobox). Because I am afraid 
gpg-agent got confused when it was started from inside a container, I am 
running it on host with systemd --user services (configuration according 
to https://wiki.archlinux.org/title/GnuPG#gpg-agent). When trying to 
decrypt a GPG-encrypted file on host, everything works fine, but when I 
try to decrypt a file in a container (or when using pass(1)) suddenly I 
get an error (it worked for months before, and I am really not certain 
what did change now):

tumbleweed-pkg~$ LANG=en_GB.utf8 gpg --decrypt 
~/.local/share/password-store/mozilla/identita.csob.cz.gpg
gpg: encrypted with rsa4096 key, ID 77D15A36BD4211B2, created 2016-04-27
       "Matěj Cepl <mcepl at cepl.eu>"
gpg: Warning: not using 'D96484AC' as default key: No secret key
gpg: Warning: not using '880BC9D8' as default key: No secret key
gpg: all values passed to '--default-key' ignored
gpg: keydb_search failed: IPC syntax error
gpg: public key decryption failed: No secret key
gpg: decryption failed: No secret key
tumbleweed-pkg~$

When looking at log-file I see this:

2024-03-02 10:53:20 gpg-agent[2434] DBG: chan_10 <- OPTION xauthority=
2024-03-02 10:53:20 gpg-agent[2434] DBG: chan_10 -> ERR 67109140 Chyba 
syntaxe IPC <GPG agent> - option argument expected
2024-03-02 10:53:20 gpg-agent[2434] DBG: chan_10 <- BYE

(“Chyba syntaxe” means obviously “A syntax error” in Czech). I have to 
admit I am a bit lost in that protocol log. Who is sending that “OPTION 
xauhtoríty=” line and what should be the right value of it, when running 
on Wayland (no Xorg around)?

Thank you for any advice,

Matěj Cepl

-- 
http://matej.ceplovi.cz/blog/, @mcepl at floss.social
GPG Finger: 3C76 A027 CA45 AD70 98B5  BC1D 7920 5802 880B C9D8

[…] sleep is no substitute for caffeine.
       -- Robert Storey in review of Debian
          (when describing re-compilation of kernel :-))