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bus: add bus_name_has_owner() helper

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Small helper to run a synchronous "NameHasOwner" request on the
dbus-daemon.
This commit is contained in:
David Herrmann 2013-11-28 14:50:19 +01:00
parent 3fdb2494c1
commit 5fd38859b3
2 changed files with 28 additions and 0 deletions
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26
src/libsystemd-bus/bus-util.c
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@ -103,6 +103,32 @@ int bus_event_loop_with_idle(sd_event *e, sd_bus *bus, const char *name, usec_t
return 0;
}
int bus_name_has_owner(sd_bus *c, const char *name, sd_bus_error *error) {
_cleanup_bus_message_unref_ sd_bus_message *rep = NULL;
int r, has_owner = 0;
assert(c);
assert(name);
r = sd_bus_call_method(c,
"org.freedesktop.DBus",
"/org/freedesktop/dbus",
"org.freedesktop.DBus",
"NameHasOwner",
error,
&rep,
"s",
name);
if (r < 0)
return r;
r = sd_bus_message_read_basic(rep, 'b', &has_owner);
if (r < 0)
return sd_bus_error_set_errno(error, r);
return has_owner;
}
int bus_verify_polkit(
sd_bus *bus,
sd_bus_message *m,

2
src/libsystemd-bus/bus-util.h
View file

@ -56,6 +56,8 @@ int bus_async_unregister_and_quit(sd_event *e, sd_bus *bus, const char *name);
int bus_event_loop_with_idle(sd_event *e, sd_bus *bus, const char *name, usec_t timeout);
int bus_name_has_owner(sd_bus *c, const char *name, sd_bus_error *error);
int bus_check_peercred(sd_bus *c);
int bus_verify_polkit(sd_bus *bus, sd_bus_message *m, const char *action, bool interactive, bool *_challenge, sd_bus_error *e);