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imsd, imsd-ofonod: let polkit decide call control, not the account name

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The system-bus policies granted net.catcrafts.IMS1 and org.ofono to root
and to the account `user`, postmarketOS's default name, so on a unit
whose account is called something else dbus denied every Dial from the
dialer — nothing in imsd's journal, nothing on screen. A field user
found it by trial (alyx report 14, 2026-09-20; ims ledger F14).

Let any local account reach both names and have the daemons decide:
placing, answering or ending a call needs polkit's
net.catcrafts.IMS1.Voice (the active local session; not an ssh login, an
inactive session or a system service account). imsd-ofonod asks about
its own callers, since its calls reach imsd as root. Reads such as the
status and the call list are not gated, and a refusal is logged with the
sender; a `--session` run, the development mode without root or polkit,
leaves the gate off. The check is ImsdBus, a small GLib module both
daemons link; the package depends on polkit.

An upgrade restarts both daemons (the previous commit), so the open
policy faces the old, ungated daemons only until the apk transaction
ends.

Tested on the dev phone (KPN) in builds of this series; not every path
has run there.
This commit is contained in:
Jorijn van der Graaf 2026-10-03 20:44:58 +02:00
commit f18baf2790
Signed by: jorijnvdgraaf
GPG key ID: 2937E59CDCC1BCFB
13 changed files with 245 additions and 52 deletions
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8
packaging/imsd-ofonod.service
View file

@ -3,9 +3,11 @@
[Unit]
Description=oFono-compatible GNOME Calls backend for imsd
Documentation=https://forgejo.catcrafts.net/Catcrafts/imsd
# org.ofono is a system-bus name, so this is a system service, and it runs
# as root: its start hook restarts GNOME Calls in the users' own managers.
# Only enable it on a GNOME/Phosh session
# org.ofono is a system-bus name only root may own (org.ofono.conf), so this
# is a system service run as root: imsd admits the calls it forwards as
# root's (it has asked polkit about its own caller), and its start hook
# restarts GNOME Calls in the users' own managers. Only enable it on a
# GNOME/Phosh session
# — Plasma Mobile uses imsd-dialerd instead. Both may run at once (different
# buses, different consumers), but a real ofonod must not.
Conflicts=ofono.service