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sd-bus: add more comments to the credential decision logic

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Lennart Poettering 2015-04-16 17:27:51 +02:00
parent 0f90839754
commit 2d0c156134
1 changed files with 12 additions and 1 deletions
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13
src/libsystemd/sd-bus/bus-convenience.c
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@ -462,11 +462,22 @@ _public_ int sd_bus_query_sender_creds(sd_bus_message *call, uint64_t mask, sd_b
/* No data passed? Or not enough data passed to retrieve the missing bits? */
if (!c || !(c->mask & SD_BUS_CREDS_PID)) {
/* We couldn't read anything from the call, let's try
* to get it from the sender or peer */
* to get it from the sender or peer. */
if (call->sender)
/* There's a sender, but the creds are
* missing. This means we are talking via
* dbus1, or are getting a message that was
* sent to us via kdbus, but was converted
* from a dbus1 message by the bus-proxy and
* thus also lacks the creds. */
return sd_bus_get_name_creds(call->bus, call->sender, mask, creds);
else
/* There's no sender, hence we are on a dbus1
* direct connection. For direct connections
* the credentials of the AF_UNIX peer matter,
* which may be queried via
* sd_bus_get_owner_creds(). */
return sd_bus_get_owner_creds(call->bus, mask, creds);
}