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bus: add convenience functions for constructing and sending method calls/signals in one call

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This commit is contained in:
Lennart Poettering 2013-04-05 04:15:39 +02:00
parent 7286037fd4
commit 917b5dc707
5 changed files with 77 additions and 17 deletions
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18
src/journal/journal-gatewayd.c
View File

@ -743,7 +743,7 @@ static int request_handler_file(
}
static int get_virtualization(char **v) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
_cleanup_bus_unref_ sd_bus *bus = NULL;
const char *t;
char *b;
@ -753,21 +753,17 @@ static int get_virtualization(char **v) {
if (r < 0)
return r;
r = sd_bus_message_new_method_call(
r = sd_bus_call_method(
bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.DBus.Properties",
"Get",
&m);
if (r < 0)
return r;
r = sd_bus_message_append(m, "ss", "org.freedesktop.systemd1.Manager", "Virtualization");
if (r < 0)
return r;
r = sd_bus_send_with_reply_and_block(bus, m, 0, NULL, &reply);
NULL,
&reply,
"ss",
"org.freedesktop.systemd1.Manager",
"Virtualization");
if (r < 0)
return r;

12
src/libsystemd-bus/bus-message.c
View File

@ -1241,7 +1241,7 @@ int sd_bus_message_close_container(sd_bus_message *m) {
return 0;
}
static int message_append_ap(
int bus_message_append_ap(
sd_bus_message *m,
const char *types,
va_list ap) {
@ -1327,7 +1327,7 @@ static int message_append_ap(
n = va_arg(ap, unsigned);
for (i = 0; i < n; i++) {
r = message_append_ap(m, s, ap);
r = bus_message_append_ap(m, s, ap);
if (r < 0)
return r;
}
@ -1349,7 +1349,7 @@ static int message_append_ap(
if (r < 0)
return r;
r = message_append_ap(m, s, ap);
r = bus_message_append_ap(m, s, ap);
if (r < 0)
return r;
@ -1377,7 +1377,7 @@ static int message_append_ap(
t += k - 1;
r = message_append_ap(m, s, ap);
r = bus_message_append_ap(m, s, ap);
if (r < 0)
return r;
@ -1407,10 +1407,10 @@ int sd_bus_message_append(sd_bus_message *m, const char *types, ...) {
if (m->sealed)
return -EPERM;
if (!types)
return -EINVAL;
return 0;
va_start(ap, types);
r = message_append_ap(m, types, ap);
r = bus_message_append_ap(m, types, ap);
va_end(ap);
return r;

2
src/libsystemd-bus/bus-message.h
View File

@ -144,3 +144,5 @@ int bus_message_from_malloc(
sd_bus_message **ret);
const char* bus_message_get_arg(sd_bus_message *m, unsigned i);
int bus_message_append_ap(sd_bus_message *m, const char *types, va_list ap);

57
src/libsystemd-bus/sd-bus.c
View File

@ -2208,3 +2208,60 @@ int sd_bus_remove_match(sd_bus *bus, const char *match, sd_bus_message_handler_t
return r;
return q;
}
int sd_bus_emit_signal(
sd_bus *bus,
const char *path,
const char *interface,
const char *member,
const char *types, ...) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
va_list ap;
int r;
if (!bus)
return -EINVAL;
r = sd_bus_message_new_signal(bus, path, interface, member, &m);
if (r < 0)
return r;
va_start(ap, types);
r = bus_message_append_ap(m, types, ap);
va_end(ap);
if (r < 0)
return r;
return sd_bus_send(bus, m, NULL);
}
int sd_bus_call_method(
sd_bus *bus,
const char *destination,
const char *path,
const char *interface,
const char *member,
sd_bus_error *error,
sd_bus_message **reply,
const char *types, ...) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
va_list ap;
int r;
if (!bus)
return -EINVAL;
r = sd_bus_message_new_method_call(bus, destination, path, interface, member, &m);
if (r < 0)
return r;
va_start(ap, types);
r = bus_message_append_ap(m, types, ap);
va_end(ap);
if (r < 0)
return r;
return sd_bus_send_with_reply_and_block(bus, m, 0, error, reply);
}

5
src/systemd/sd-bus.h
View File

@ -145,6 +145,11 @@ int sd_bus_message_exit_container(sd_bus_message *m);
int sd_bus_message_peek_type(sd_bus_message *m, char *type, const char **contents);
int sd_bus_message_rewind(sd_bus_message *m, int complete);
/* Convenience calls */
int sd_bus_emit_signal(sd_bus *bus, const char *path, const char *interface, const char *member, const char *types, ...);
int sd_bus_call_method(sd_bus *bus, const char *destination, const char *path, const char *interface, const char *member, sd_bus_error *error, sd_bus_message **reply, const char *types, ...);
/* Bus management */
int sd_bus_get_unique_name(sd_bus *bus, const char **unique);