chiark / gitweb /
unit: use weaker dependencies between mount and device units in --user mode
[elogind.git] / src / core / dbus-service.c
index 129e131..e1f3d56 100644 (file)
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#include <errno.h>
-
-#include "dbus-unit.h"
+#include "strv.h"
+#include "path-util.h"
+#include "unit.h"
+#include "service.h"
 #include "dbus-execute.h"
 #include "dbus-kill.h"
+#include "dbus-cgroup.h"
 #include "dbus-service.h"
-#include "dbus-common.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=\"TimeoutUSec\" 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_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                                      \
-        "  <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[] _introspect_("Service") = 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, start_timestamp.realtime)  },
-        { "ExecMainExitTimestampMonotonic", bus_property_append_usec, "t", offsetof(ExecStatus, start_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)                    },
-        { NULL, }
-};
+#include "bus-util.h"
 
-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)                 },
-        { "TimeoutUSec",            bus_property_append_usec,         "t", offsetof(Service, timeout_start_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)                       },
-        { NULL, }
+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_failure_action, failure_action, FailureAction);
+
+const sd_bus_vtable bus_service_vtable[] = {
+        SD_BUS_VTABLE_START(0),
+        SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Service, type), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("Restart", "s", property_get_restart, offsetof(Service, restart), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("PIDFile", "s", NULL, offsetof(Service, pid_file), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("NotifyAccess", "s", property_get_notify_access, offsetof(Service, notify_access), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("RestartUSec", "t", bus_property_get_usec, offsetof(Service, restart_usec), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("TimeoutStartUSec", "t", bus_property_get_usec, offsetof(Service, timeout_start_usec), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("TimeoutStopUSec", "t", bus_property_get_usec, offsetof(Service, timeout_stop_usec), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("WatchdogUSec", "t", bus_property_get_usec, offsetof(Service, watchdog_usec), SD_BUS_VTABLE_PROPERTY_CONST),
+        BUS_PROPERTY_DUAL_TIMESTAMP("WatchdogTimestamp", offsetof(Service, watchdog_timestamp), 0),
+        SD_BUS_PROPERTY("StartLimitInterval", "t", bus_property_get_usec, offsetof(Service, start_limit.interval), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("StartLimitBurst", "u", bus_property_get_unsigned, offsetof(Service, start_limit.burst), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("StartLimitAction", "s", property_get_failure_action, offsetof(Service, start_limit_action), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("RebootArgument", "s", NULL, offsetof(Service, reboot_arg), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("FailureAction", "s", property_get_failure_action, offsetof(Service, failure_action), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("PermissionsStartOnly", "b", bus_property_get_bool, offsetof(Service, permissions_start_only), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("RootDirectoryStartOnly", "b", bus_property_get_bool, offsetof(Service, root_directory_start_only), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("RemainAfterExit", "b", bus_property_get_bool, offsetof(Service, remain_after_exit), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("GuessMainPID", "b", bus_property_get_bool, offsetof(Service, guess_main_pid), SD_BUS_VTABLE_PROPERTY_CONST),
+        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), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("FileDescriptorStoreMax", "u", NULL, offsetof(Service, n_fd_store_max), SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("StatusText", "s", NULL, offsetof(Service, status_text), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+        SD_BUS_PROPERTY("StatusErrno", "i", NULL, offsetof(Service, status_errno), 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_LIST_VTABLE("ExecStartPre", offsetof(Service, exec_command[SERVICE_EXEC_START_PRE]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
+        BUS_EXEC_COMMAND_LIST_VTABLE("ExecStart", offsetof(Service, exec_command[SERVICE_EXEC_START]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
+        BUS_EXEC_COMMAND_LIST_VTABLE("ExecStartPost", offsetof(Service, exec_command[SERVICE_EXEC_START_POST]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
+        BUS_EXEC_COMMAND_LIST_VTABLE("ExecReload", offsetof(Service, exec_command[SERVICE_EXEC_RELOAD]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
+        BUS_EXEC_COMMAND_LIST_VTABLE("ExecStop", offsetof(Service, exec_command[SERVICE_EXEC_STOP]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
+        BUS_EXEC_COMMAND_LIST_VTABLE("ExecStopPost", offsetof(Service, exec_command[SERVICE_EXEC_STOP_POST]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
+        SD_BUS_VTABLE_END
 };
 
-DBusHandlerResult bus_service_message_handler(Unit *u, DBusConnection *connection, DBusMessage *message) {
+static int bus_service_set_transient_property(
+                Service *s,
+                const char *name,
+                sd_bus_message *message,
+                UnitSetPropertiesMode mode,
+                sd_bus_error *error) {
+
+        int r;
+
+        assert(s);
+        assert(name);
+        assert(message);
+
+        if (streq(name, "RemainAfterExit")) {
+                int 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));
+                }
+
+                return 1;
+
+        } else if (streq(name, "Type")) {
+                const char *t;
+                ServiceType k;
+
+                r = sd_bus_message_read(message, "s", &t);
+                if (r < 0)
+                        return r;
+
+                k = service_type_from_string(t);
+                if (k < 0)
+                        return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid service type %s", t);
+
+                if (mode != UNIT_CHECK) {
+                        s->type = k;
+                        unit_write_drop_in_private_format(UNIT(s), mode, name, "Type=%s\n", service_type_to_string(s->type));
+                }
+
+                return 1;
+
+        } else if (streq(name, "ExecStart")) {
+                unsigned n = 0;
+
+                r = sd_bus_message_enter_container(message, 'a', "(sasb)");
+                if (r < 0)
+                        return r;
+
+                while ((r = sd_bus_message_enter_container(message, 'r', "sasb")) > 0) {
+                        _cleanup_strv_free_ char **argv = NULL;
+                        const char *path;
+                        int b;
+
+                        r = sd_bus_message_read(message, "s", &path);
+                        if (r < 0)
+                                return r;
+
+                        if (!path_is_absolute(path))
+                                return sd_bus_error_set_errnof(error, EINVAL, "Path %s is not absolute.", path);
+
+                        r = sd_bus_message_read_strv(message, &argv);
+                        if (r < 0)
+                                return r;
+
+                        r = sd_bus_message_read(message, "b", &b);
+                        if (r < 0)
+                                return r;
+
+                        r = sd_bus_message_exit_container(message);
+                        if (r < 0)
+                                return r;
+
+                        if (mode != UNIT_CHECK) {
+                                ExecCommand *c;
+
+                                c = new0(ExecCommand, 1);
+                                if (!c)
+                                        return -ENOMEM;
+
+                                c->path = strdup(path);
+                                if (!c->path) {
+                                        free(c);
+                                        return -ENOMEM;
+                                }
+
+                                c->argv = argv;
+                                argv = NULL;
+
+                                c->ignore = b;
+
+                                path_kill_slashes(c->path);
+                                exec_command_append_list(&s->exec_command[SERVICE_EXEC_START], c);
+                        }
+
+                        n++;
+                }
+
+                if (r < 0)
+                        return r;
+
+                r = sd_bus_message_exit_container(message);
+                if (r < 0)
+                        return r;
+
+                if (mode != UNIT_CHECK) {
+                        _cleanup_free_ char *buf = NULL;
+                        _cleanup_fclose_ FILE *f = NULL;
+                        ExecCommand *c;
+                        size_t size = 0;
+
+                        if (n == 0)
+                                s->exec_command[SERVICE_EXEC_START] = exec_command_free_list(s->exec_command[SERVICE_EXEC_START]);
+
+                        f = open_memstream(&buf, &size);
+                        if (!f)
+                                return -ENOMEM;
+
+                        fputs("ExecStart=\n", f);
+
+                        LIST_FOREACH(command, c, s->exec_command[SERVICE_EXEC_START]) {
+                                _cleanup_free_ char *a;
+
+                                a = strv_join_quoted(c->argv);
+                                if (!a)
+                                        return -ENOMEM;
+
+                                fprintf(f, "ExecStart=%s@%s %s\n",
+                                        c->ignore ? "-" : "",
+                                        c->path,
+                                        a);
+                        }
+
+                        fflush(f);
+                        unit_write_drop_in_private(UNIT(s), mode, name, buf);
+                }
+
+                return 1;
+        }
+
+        return 0;
+}
+
+int bus_service_set_property(
+                Unit *u,
+                const char *name,
+                sd_bus_message *message,
+                UnitSetPropertiesMode mode,
+                sd_bus_error *error) {
+
         Service *s = SERVICE(u);
+        int r;
+
+        assert(s);
+        assert(name);
+        assert(message);
+
+        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, message, mode, error);
+                if (r != 0)
+                        return r;
+
+                r = bus_exec_context_set_transient_property(u, &s->exec_context, name, message, mode, error);
+                if (r != 0)
+                        return r;
+
+                r = bus_kill_context_set_transient_property(u, &s->kill_context, name, message, mode, error);
+                if (r != 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+int bus_service_commit_properties(Unit *u) {
+        assert(u);
 
-        const BusBoundProperties bps[] = {
-                { "org.freedesktop.systemd1.Unit",    bus_unit_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_exec_main_status_properties, &s->main_exec_status },
-                { NULL, }
-        };
+        unit_update_cgroup_members_masks(u);
+        unit_realize_cgroup(u);
 
-        return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, bps);
+        return 0;
 }