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manager: Return MCT_MANAGER_ERROR_DISABLED if no accountsservice 

In distributions that package shared libraries and daemons separately,
it's possible to have the shared library (because it's required to run
something like Flatpak) but not the accountsservice daemon or its
malcontent extension (because the administrator of this particular
installation has no interest in parental controls, and their choice of
desktop environment is such that nothing else depends on accountsservice
either). This minimizes the memory and disk space cost of enabling the
libmalcontent feature in Flatpak for those who do not need it, while
keeping it available for those that do.

Treat this the same as if accountsservice is available but the
malcontent extension is not: fail open, by returning
MCT_MANAGER_ERROR_DISABLED.

Resolves: https://gitlab.freedesktop.org/pwithnall/malcontent/-/issues/27
Bug-Debian: https://bugs.debian.org/972145
Signed-off-by: Simon McVittie <smcv@debian.org>
This commit is contained in:
Simon McVittie 2020-10-14 09:46:03 +01:00
parent 5c0a7bf056
commit 1abce3eb91
1 changed files with 8 additions and 0 deletions
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8
libmalcontent/manager.c
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@ -286,6 +286,14 @@ bus_error_to_manager_error (const GError *bus_error,
bus_remote_error_matches (bus_error, "org.freedesktop.Accounts.Error.Failed"))
return g_error_new (MCT_MANAGER_ERROR, MCT_MANAGER_ERROR_INVALID_USER,
_("User %u does not exist"), (guint) user_id);
else if (g_error_matches (bus_error, G_DBUS_ERROR, G_DBUS_ERROR_SERVICE_UNKNOWN) ||
g_error_matches (bus_error, G_DBUS_ERROR, G_DBUS_ERROR_NAME_HAS_NO_OWNER))
/* If accountsservice is not available on the system bus, then the
* com.endlessm.ParentalControls.AppFilter extension interface
* certainly can't be available. */
return g_error_new_literal (MCT_MANAGER_ERROR,
MCT_MANAGER_ERROR_DISABLED,
_("System accounts service not available"));
else
return g_error_copy (bus_error);
}