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authorLennart Poettering <lennart@poettering.net>2013-11-19 21:12:59 +0100
committerLennart Poettering <lennart@poettering.net>2013-11-20 20:52:36 +0100
commit718db96199eb307751264e4163555662c9a389fa (patch)
tree9ec8467596ba1acba76bb6273c7797baf68c1a00 /src/core/dbus-service.c
parent3febea3a0b0a968ea281e7959c1654cbaf95c9bf (diff)
core: convert PID 1 to libsystemd-bus
This patch converts PID 1 to libsystemd-bus and thus drops the dependency on libdbus. The only remaining code using libdbus is a test case that validates our bus marshalling against libdbus' marshalling, and this dependency can be turned off. This patch also adds a couple of things to libsystem-bus, that are necessary to make the port work: - Synthesizing of "Disconnected" messages when bus connections are severed. - Support for attaching multiple vtables for the same interface on the same path. This patch also fixes the SetDefaultTarget() and GetDefaultTarget() bus calls which used an inappropriate signature. As a side effect we will now generate PropertiesChanged messages which carry property contents, rather than just invalidation information.
Diffstat (limited to 'src/core/dbus-service.c')
-rw-r--r--src/core/dbus-service.c266
1 files changed, 90 insertions, 176 deletions
diff --git a/src/core/dbus-service.c b/src/core/dbus-service.c
index c888570c4b..c4bfa2c38f 100644
--- a/src/core/dbus-service.c
+++ b/src/core/dbus-service.c
@@ -19,176 +19,92 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <errno.h>
-
#include "strv.h"
#include "path-util.h"
+#include "unit.h"
+#include "service.h"
#include "dbus-unit.h"
#include "dbus-execute.h"
#include "dbus-kill.h"
#include "dbus-cgroup.h"
-#include "dbus-common.h"
-#include "selinux-access.h"
#include "dbus-service.h"
-
-#define BUS_SERVICE_INTERFACE \
- " <interface name=\"org.freedesktop.systemd1.Service\">\n" \
- " <property name=\"Type\" type=\"s\" access=\"read\"/>\n" \
- " <property name=\"Restart\" type=\"s\" access=\"read\"/>\n" \
- " <property name=\"PIDFile\" type=\"s\" access=\"read\"/>\n" \
- " <property name=\"NotifyAccess\" type=\"s\" access=\"read\"/>\n" \
- " <property name=\"RestartUSec\" type=\"t\" access=\"read\"/>\n" \
- " <property name=\"TimeoutStartUSec\" type=\"t\" access=\"read\"/>\n" \
- " <property name=\"TimeoutStopUSec\" type=\"t\" access=\"read\"/>\n" \
- " <property name=\"WatchdogUSec\" type=\"t\" access=\"read\"/>\n" \
- " <property name=\"WatchdogTimestamp\" type=\"t\" access=\"read\"/>\n" \
- " <property name=\"WatchdogTimestampMonotonic\" type=\"t\" access=\"read\"/>\n" \
- " <property name=\"StartLimitInterval\" type=\"t\" access=\"read\"/>\n" \
- " <property name=\"StartLimitBurst\" type=\"u\" access=\"read\"/>\n" \
- " <property name=\"StartLimitAction\" type=\"s\" access=\"readwrite\"/>\n" \
- BUS_UNIT_CGROUP_INTERFACE \
- BUS_EXEC_COMMAND_INTERFACE("ExecStartPre") \
- BUS_EXEC_COMMAND_INTERFACE("ExecStart") \
- BUS_EXEC_COMMAND_INTERFACE("ExecStartPost") \
- BUS_EXEC_COMMAND_INTERFACE("ExecReload") \
- BUS_EXEC_COMMAND_INTERFACE("ExecStop") \
- BUS_EXEC_COMMAND_INTERFACE("ExecStopPost") \
- BUS_EXEC_CONTEXT_INTERFACE \
- BUS_KILL_CONTEXT_INTERFACE \
- BUS_CGROUP_CONTEXT_INTERFACE \
- " <property name=\"PermissionsStartOnly\" type=\"b\" access=\"read\"/>\n" \
- " <property name=\"RootDirectoryStartOnly\" type=\"b\" access=\"read\"/>\n" \
- " <property name=\"RemainAfterExit\" type=\"b\" access=\"read\"/>\n" \
- BUS_EXEC_STATUS_INTERFACE("ExecMain") \
- " <property name=\"MainPID\" type=\"u\" access=\"read\"/>\n" \
- " <property name=\"ControlPID\" type=\"u\" access=\"read\"/>\n" \
- " <property name=\"BusName\" type=\"s\" access=\"read\"/>\n" \
- " <property name=\"StatusText\" type=\"s\" access=\"read\"/>\n" \
- " <property name=\"Result\" type=\"s\" access=\"read\"/>\n" \
- " </interface>\n"
-
-#define INTROSPECTION \
- DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \
- "<node>\n" \
- BUS_UNIT_INTERFACE \
- BUS_SERVICE_INTERFACE \
- BUS_PROPERTIES_INTERFACE \
- BUS_PEER_INTERFACE \
- BUS_INTROSPECTABLE_INTERFACE \
- "</node>\n"
-
-#define INTERFACES_LIST \
- BUS_UNIT_INTERFACES_LIST \
- "org.freedesktop.systemd1.Service\0"
-
-const char bus_service_interface[] = BUS_SERVICE_INTERFACE;
-
-const char bus_service_invalidating_properties[] =
- "ExecStartPre\0"
- "ExecStart\0"
- "ExecStartPost\0"
- "ExecReload\0"
- "ExecStop\0"
- "ExecStopPost\0"
- "ExecMain\0"
- "WatchdogTimestamp\0"
- "WatchdogTimestampMonotonic\0"
- "MainPID\0"
- "ControlPID\0"
- "StatusText\0"
- "Result\0";
-
-static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_service_append_type, service_type, ServiceType);
-static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_service_append_restart, service_restart, ServiceRestart);
-static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_service_append_notify_access, notify_access, NotifyAccess);
-static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_service_append_service_result, service_result, ServiceResult);
-static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_service_append_start_limit_action, start_limit_action, StartLimitAction);
-static DEFINE_BUS_PROPERTY_SET_ENUM(bus_service_set_start_limit_action, start_limit_action, StartLimitAction);
-
-static const BusProperty bus_exec_main_status_properties[] = {
- { "ExecMainStartTimestamp", bus_property_append_usec, "t", offsetof(ExecStatus, start_timestamp.realtime) },
- { "ExecMainStartTimestampMonotonic",bus_property_append_usec, "t", offsetof(ExecStatus, start_timestamp.monotonic) },
- { "ExecMainExitTimestamp", bus_property_append_usec, "t", offsetof(ExecStatus, exit_timestamp.realtime) },
- { "ExecMainExitTimestampMonotonic", bus_property_append_usec, "t", offsetof(ExecStatus, exit_timestamp.monotonic) },
- { "ExecMainPID", bus_property_append_pid, "u", offsetof(ExecStatus, pid) },
- { "ExecMainCode", bus_property_append_int, "i", offsetof(ExecStatus, code) },
- { "ExecMainStatus", bus_property_append_int, "i", offsetof(ExecStatus, status) },
- {}
+#include "bus-util.h"
+
+static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, service_type, ServiceType);
+static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, service_result, ServiceResult);
+static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_restart, service_restart, ServiceRestart);
+static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_notify_access, notify_access, NotifyAccess);
+static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_start_limit_action, start_limit_action, StartLimitAction);
+
+const sd_bus_vtable bus_service_vtable[] = {
+ SD_BUS_VTABLE_START(0),
+ SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Service, type), 0),
+ SD_BUS_PROPERTY("Restart", "s", property_get_restart, offsetof(Service, restart), 0),
+ SD_BUS_PROPERTY("PIDFile", "s", NULL, offsetof(Service, pid_file), 0),
+ SD_BUS_PROPERTY("NotifyAccess", "s", property_get_notify_access, offsetof(Service, notify_access), 0),
+ SD_BUS_PROPERTY("RestartUSec", "t", bus_property_get_usec, offsetof(Service, restart_usec), 0),
+ SD_BUS_PROPERTY("TimeoutStartUSec", "t", bus_property_get_usec, offsetof(Service, timeout_start_usec), 0),
+ SD_BUS_PROPERTY("TimeoutStopUSec", "t", bus_property_get_usec, offsetof(Service, timeout_stop_usec), 0),
+ SD_BUS_PROPERTY("WatchdogUSec", "t", bus_property_get_usec, offsetof(Service, watchdog_usec), 0),
+ BUS_PROPERTY_DUAL_TIMESTAMP("WatchdogTimestamp", offsetof(Service, watchdog_timestamp), 0),
+ SD_BUS_PROPERTY("StartLimitInterval", "t", bus_property_get_usec, offsetof(Service, start_limit.interval), 0),
+ SD_BUS_PROPERTY("StartLimitBurst", "u", bus_property_get_unsigned, offsetof(Service, start_limit.burst), 0),
+ SD_BUS_PROPERTY("StartLimitAction", "s", property_get_start_limit_action, offsetof(Service, start_limit_action), 0),
+ SD_BUS_PROPERTY("PermissionsStartOnly", "b", bus_property_get_bool, offsetof(Service, permissions_start_only), 0),
+ SD_BUS_PROPERTY("RootDirectoryStartOnly", "b", bus_property_get_bool, offsetof(Service, root_directory_start_only), 0),
+ SD_BUS_PROPERTY("RemainAfterExit", "b", bus_property_get_bool, offsetof(Service, remain_after_exit), 0),
+ SD_BUS_PROPERTY("GuessMainPID", "b", bus_property_get_bool, offsetof(Service, guess_main_pid), 0),
+ SD_BUS_PROPERTY("MainPID", "u", bus_property_get_pid, offsetof(Service, main_pid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+ SD_BUS_PROPERTY("ControlPID", "u", bus_property_get_pid, offsetof(Service, control_pid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+ SD_BUS_PROPERTY("BusName", "s", NULL, offsetof(Service, bus_name), 0),
+ SD_BUS_PROPERTY("StatusText", "s", NULL, offsetof(Service, status_text), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+ SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Service, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+ BUS_EXEC_STATUS_VTABLE("ExecMain", offsetof(Service, main_exec_status), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+ BUS_EXEC_COMMAND_VTABLE("ExecStartPre", offsetof(Service, exec_command[SERVICE_EXEC_START_PRE]), 0),
+ BUS_EXEC_COMMAND_VTABLE("ExecStart", offsetof(Service, exec_command[SERVICE_EXEC_START]), 0),
+ BUS_EXEC_COMMAND_VTABLE("ExecStartPost", offsetof(Service, exec_command[SERVICE_EXEC_START_POST]), 0),
+ BUS_EXEC_COMMAND_VTABLE("ExecReload", offsetof(Service, exec_command[SERVICE_EXEC_RELOAD]), 0),
+ BUS_EXEC_COMMAND_VTABLE("ExecStop", offsetof(Service, exec_command[SERVICE_EXEC_STOP]), 0),
+ BUS_EXEC_COMMAND_VTABLE("ExecStopPost", offsetof(Service, exec_command[SERVICE_EXEC_STOP_POST]), 0),
+ SD_BUS_VTABLE_END
};
-static const BusProperty bus_service_properties[] = {
- { "Type", bus_service_append_type, "s", offsetof(Service, type) },
- { "Restart", bus_service_append_restart, "s", offsetof(Service, restart) },
- { "PIDFile", bus_property_append_string, "s", offsetof(Service, pid_file), true },
- { "NotifyAccess", bus_service_append_notify_access, "s", offsetof(Service, notify_access) },
- { "RestartUSec", bus_property_append_usec, "t", offsetof(Service, restart_usec) },
- { "TimeoutStartUSec", bus_property_append_usec, "t", offsetof(Service, timeout_start_usec) },
- { "TimeoutStopUSec", bus_property_append_usec, "t", offsetof(Service, timeout_stop_usec) },
- { "WatchdogUSec", bus_property_append_usec, "t", offsetof(Service, watchdog_usec) },
- { "WatchdogTimestamp", bus_property_append_usec, "t", offsetof(Service, watchdog_timestamp.realtime) },
- { "WatchdogTimestampMonotonic",bus_property_append_usec, "t", offsetof(Service, watchdog_timestamp.monotonic) },
- { "StartLimitInterval", bus_property_append_usec, "t", offsetof(Service, start_limit.interval) },
- { "StartLimitBurst", bus_property_append_uint32, "u", offsetof(Service, start_limit.burst) },
- { "StartLimitAction", bus_service_append_start_limit_action,"s", offsetof(Service, start_limit_action), false, bus_service_set_start_limit_action},
- BUS_EXEC_COMMAND_PROPERTY("ExecStartPre", offsetof(Service, exec_command[SERVICE_EXEC_START_PRE]), true ),
- BUS_EXEC_COMMAND_PROPERTY("ExecStart", offsetof(Service, exec_command[SERVICE_EXEC_START]), true ),
- BUS_EXEC_COMMAND_PROPERTY("ExecStartPost", offsetof(Service, exec_command[SERVICE_EXEC_START_POST]), true ),
- BUS_EXEC_COMMAND_PROPERTY("ExecReload", offsetof(Service, exec_command[SERVICE_EXEC_RELOAD]), true ),
- BUS_EXEC_COMMAND_PROPERTY("ExecStop", offsetof(Service, exec_command[SERVICE_EXEC_STOP]), true ),
- BUS_EXEC_COMMAND_PROPERTY("ExecStopPost", offsetof(Service, exec_command[SERVICE_EXEC_STOP_POST]), true ),
- { "PermissionsStartOnly", bus_property_append_bool, "b", offsetof(Service, permissions_start_only) },
- { "RootDirectoryStartOnly", bus_property_append_bool, "b", offsetof(Service, root_directory_start_only) },
- { "RemainAfterExit", bus_property_append_bool, "b", offsetof(Service, remain_after_exit) },
- { "GuessMainPID", bus_property_append_bool, "b", offsetof(Service, guess_main_pid) },
- { "MainPID", bus_property_append_pid, "u", offsetof(Service, main_pid) },
- { "ControlPID", bus_property_append_pid, "u", offsetof(Service, control_pid) },
- { "BusName", bus_property_append_string, "s", offsetof(Service, bus_name), true },
- { "StatusText", bus_property_append_string, "s", offsetof(Service, status_text), true },
- { "Result", bus_service_append_service_result,"s", offsetof(Service, result) },
- {}
+const char* const bus_service_changing_properties[] = {
+ "ExecMainStartTimestamp",
+ "ExecMainStartTimestampMonotonic",
+ "ExecMainExitTimestamp",
+ "ExecMainExitTimestampMonotonic",
+ "ExecMainPID",
+ "ExecMainCode",
+ "ExecMainStatus",
+ "MainPID",
+ "ControlPID",
+ "StatusText",
+ "Result",
+ NULL
};
-DBusHandlerResult bus_service_message_handler(Unit *u, DBusConnection *connection, DBusMessage *message) {
- Service *s = SERVICE(u);
-
- const BusBoundProperties bps[] = {
- { "org.freedesktop.systemd1.Unit", bus_unit_properties, u },
- { "org.freedesktop.systemd1.Service", bus_unit_cgroup_properties, u },
- { "org.freedesktop.systemd1.Service", bus_service_properties, s },
- { "org.freedesktop.systemd1.Service", bus_exec_context_properties, &s->exec_context },
- { "org.freedesktop.systemd1.Service", bus_kill_context_properties, &s->kill_context },
- { "org.freedesktop.systemd1.Service", bus_cgroup_context_properties, &s->cgroup_context },
- { "org.freedesktop.systemd1.Service", bus_exec_main_status_properties, &s->main_exec_status },
- {}
- };
-
- SELINUX_UNIT_ACCESS_CHECK(u, connection, message, "status");
-
- return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, bps);
-}
-
static int bus_service_set_transient_property(
Service *s,
const char *name,
- DBusMessageIter *i,
+ sd_bus_message *message,
UnitSetPropertiesMode mode,
- DBusError *error) {
+ sd_bus_error *error) {
int r;
- assert(name);
assert(s);
- assert(i);
+ assert(name);
+ assert(message);
if (streq(name, "RemainAfterExit")) {
- if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_BOOLEAN)
- return -EINVAL;
+ int b;
- if (mode != UNIT_CHECK) {
- dbus_bool_t b;
-
- dbus_message_iter_get_basic(i, &b);
+ r = sd_bus_message_read(message, "b", &b);
+ if (r < 0)
+ return r;
+ if (mode != UNIT_CHECK) {
s->remain_after_exit = b;
unit_write_drop_in_private_format(UNIT(s), mode, name, "RemainAfterExit=%s\n", yes_no(b));
}
@@ -196,38 +112,35 @@ static int bus_service_set_transient_property(
return 1;
} else if (streq(name, "ExecStart")) {
- DBusMessageIter sub;
unsigned n = 0;
- if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_ARRAY ||
- dbus_message_iter_get_element_type(i) != DBUS_TYPE_STRUCT)
- return -EINVAL;
+ r = sd_bus_message_enter_container(message, 'a', "(sasb)");
+ if (r < 0)
+ return r;
- dbus_message_iter_recurse(i, &sub);
- while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
+ while ((r = sd_bus_message_enter_container(message, 'r', "sasb")) > 0) {
_cleanup_strv_free_ char **argv = NULL;
- DBusMessageIter sub2;
- dbus_bool_t ignore;
const char *path;
+ int b;
- dbus_message_iter_recurse(&sub, &sub2);
-
- if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0)
- return -EINVAL;
+ r = sd_bus_message_read(message, "s", &path);
+ if (r < 0)
+ return r;
- if (!path_is_absolute(path)) {
- dbus_set_error(error, DBUS_ERROR_INVALID_ARGS, "Path %s is not absolute.", path);
- return -EINVAL;
- }
+ if (!path_is_absolute(path))
+ return sd_bus_error_set_errnof(error, EINVAL, "Path %s is not absolute.", path);
- r = bus_parse_strv_iter(&sub2, &argv);
+ r = sd_bus_message_read_strv(message, &argv);
if (r < 0)
return r;
- dbus_message_iter_next(&sub2);
+ r = sd_bus_message_read(message, "b", &b);
+ if (r < 0)
+ return r;
- if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, false) < 0)
- return -EINVAL;
+ r = sd_bus_message_exit_container(message);
+ if (r < 0)
+ return r;
if (mode != UNIT_CHECK) {
ExecCommand *c;
@@ -245,15 +158,16 @@ static int bus_service_set_transient_property(
c->argv = argv;
argv = NULL;
- c->ignore = ignore;
+ c->ignore = b;
path_kill_slashes(c->path);
exec_command_append_list(&s->exec_command[SERVICE_EXEC_START], c);
}
n++;
- dbus_message_iter_next(&sub);
}
+ if (r < 0)
+ return r;
if (mode != UNIT_CHECK) {
_cleanup_free_ char *buf = NULL;
@@ -298,29 +212,29 @@ static int bus_service_set_transient_property(
int bus_service_set_property(
Unit *u,
const char *name,
- DBusMessageIter *i,
+ sd_bus_message *message,
UnitSetPropertiesMode mode,
- DBusError *error) {
+ sd_bus_error *error) {
Service *s = SERVICE(u);
int r;
+ assert(s);
assert(name);
- assert(u);
- assert(i);
+ assert(message);
- r = bus_cgroup_set_property(u, &s->cgroup_context, name, i, mode, error);
+ r = bus_cgroup_set_property(u, &s->cgroup_context, name, message, mode, error);
if (r != 0)
return r;
if (u->transient && u->load_state == UNIT_STUB) {
/* This is a transient unit, let's load a little more */
- r = bus_service_set_transient_property(s, name, i, mode, error);
+ r = bus_service_set_transient_property(s, name, message, mode, error);
if (r != 0)
return r;
- r = bus_kill_context_set_transient_property(u, &s->kill_context, name, i, mode, error);
+ r = bus_kill_context_set_transient_property(u, &s->kill_context, name, message, mode, error);
if (r != 0)
return r;
}