chiark / gitweb /
systemctl: introduce reset-maintenance command
[elogind.git] / src / dbus-manager.c
index b3e42fc33328847e208acf76de24aadcf2497368..969c430520e15291e191f35cbc1879e1da176c8e 100644 (file)
@@ -25,6 +25,7 @@
 #include "log.h"
 #include "dbus-manager.h"
 #include "strv.h"
+#include "bus-errors.h"
 
 #define BUS_MANAGER_INTERFACE                                           \
         " <interface name=\"org.freedesktop.systemd1.Manager\">\n"      \
         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
         "  </method>\n"                                                 \
+        "  <method name=\"TryRestartUnit\">\n"                          \
+        "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
+        "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
+        "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
+        "  </method>\n"                                                 \
+        "  <method name=\"ReloadOrRestartUnit\">\n"                     \
+        "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
+        "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
+        "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
+        "  </method>\n"                                                 \
+        "  <method name=\"ReloadOrTryRestartUnit\">\n"                  \
+        "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
+        "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
+        "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
+        "  </method>\n"                                                 \
+        "  <method name=\"ResetMaintenanceUnit\">\n"                    \
+        "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
+        "  </method>\n"                                                 \
         "  <method name=\"GetJob\">\n"                                  \
         "   <arg name=\"id\" type=\"u\" direction=\"in\"/>\n"           \
         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
         "  </method>\n"                                                 \
         "  <method name=\"ClearJobs\"/>\n"                              \
+        "  <method name=\"ResetMaintenance\"/>\n"                       \
         "  <method name=\"ListUnits\">\n"                               \
         "   <arg name=\"units\" type=\"a(sssssouso)\" direction=\"out\"/>\n" \
         "  </method>\n"                                                 \
         "  </signal>"                                                   \
         "  <property name=\"Version\" type=\"s\" access=\"read\"/>\n"   \
         "  <property name=\"RunningAs\" type=\"s\" access=\"read\"/>\n" \
-        "  <property name=\"BootTimestamp\" type=\"t\" access=\"read\"/>\n" \
+        "  <property name=\"StartupTimestamp\" type=\"t\" access=\"read\"/>\n" \
         "  <property name=\"LogLevel\" type=\"s\" access=\"read\"/>\n"  \
         "  <property name=\"LogTarget\" type=\"s\" access=\"read\"/>\n" \
         "  <property name=\"NNames\" type=\"u\" access=\"read\"/>\n"    \
         "  <property name=\"NJobs\" type=\"u\" access=\"read\"/>\n"     \
         "  <property name=\"Environment\" type=\"as\" access=\"read\"/>\n" \
+        "  <property name=\"ConfirmSpawn\" type=\"b\" access=\"read\"/>\n" \
+        "  <property name=\"ShowStatus\" type=\"b\" access=\"read\"/>\n" \
+        "  <property name=\"UnitPath\" type=\"as\" access=\"read\"/>\n" \
+        "  <property name=\"SysVInitPath\" type=\"as\" access=\"read\"/>\n" \
+        "  <property name=\"SysVRcndPath\" type=\"as\" access=\"read\"/>\n" \
+        "  <property name=\"NotifySocket\" type=\"s\" access=\"read\"/>\n" \
+        "  <property name=\"ControlGroupHierarchy\" type=\"s\" access=\"read\"/>\n" \
         " </interface>\n"
 
 #define INTROSPECTION_BEGIN                                             \
@@ -185,18 +212,39 @@ static int bus_manager_append_n_jobs(Manager *m, DBusMessageIter *i, const char
         return 0;
 }
 
+static const char *message_get_sender_with_fallback(DBusMessage *m) {
+        const char *s;
+
+        assert(m);
+
+        if ((s = dbus_message_get_sender(m)))
+                return s;
+
+        /* When the message came in from a direct connection the
+         * message will have no sender. We fix that here. */
+
+        return ":no-sender";
+}
+
 static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
         Manager *m = data;
 
         const BusProperty properties[] = {
-                { "org.freedesktop.systemd1.Manager", "Version",       bus_property_append_string,    "s", PACKAGE_STRING     },
-                { "org.freedesktop.systemd1.Manager", "RunningAs",     bus_manager_append_running_as, "s", &m->running_as     },
-                { "org.freedesktop.systemd1.Manager", "BootTimestamp", bus_property_append_uint64,    "t", &m->startup_timestamp.realtime },
-                { "org.freedesktop.systemd1.Manager", "LogLevel",      bus_manager_append_log_level,  "s", NULL               },
-                { "org.freedesktop.systemd1.Manager", "LogTarget",     bus_manager_append_log_target, "s", NULL               },
-                { "org.freedesktop.systemd1.Manager", "NNames",        bus_manager_append_n_names,    "u", NULL               },
-                { "org.freedesktop.systemd1.Manager", "NJobs",         bus_manager_append_n_jobs,     "u", NULL               },
-                { "org.freedesktop.systemd1.Manager", "Environment",   bus_property_append_strv,      "as", m->environment   },
+                { "org.freedesktop.systemd1.Manager", "Version",       bus_property_append_string,    "s",  PACKAGE_STRING     },
+                { "org.freedesktop.systemd1.Manager", "RunningAs",     bus_manager_append_running_as, "s",  &m->running_as     },
+                { "org.freedesktop.systemd1.Manager", "StartupTimestamp", bus_property_append_uint64, "t",  &m->startup_timestamp.realtime },
+                { "org.freedesktop.systemd1.Manager", "LogLevel",      bus_manager_append_log_level,  "s",  NULL               },
+                { "org.freedesktop.systemd1.Manager", "LogTarget",     bus_manager_append_log_target, "s",  NULL               },
+                { "org.freedesktop.systemd1.Manager", "NNames",        bus_manager_append_n_names,    "u",  NULL               },
+                { "org.freedesktop.systemd1.Manager", "NJobs",         bus_manager_append_n_jobs,     "u",  NULL               },
+                { "org.freedesktop.systemd1.Manager", "Environment",   bus_property_append_strv,      "as", m->environment     },
+                { "org.freedesktop.systemd1.Manager", "ConfirmSpawn",  bus_property_append_bool,      "b",  &m->confirm_spawn  },
+                { "org.freedesktop.systemd1.Manager", "ShowStatus",    bus_property_append_bool,      "b",  &m->show_status    },
+                { "org.freedesktop.systemd1.Manager", "UnitPath",      bus_property_append_strv,      "as", m->lookup_paths.unit_path },
+                { "org.freedesktop.systemd1.Manager", "SysVInitPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvinit_path },
+                { "org.freedesktop.systemd1.Manager", "SysVRcndPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvrcnd_path },
+                { "org.freedesktop.systemd1.Manager", "NotifySocket",  bus_property_append_string,    "s",  m->notify_socket   },
+                { "org.freedesktop.systemd1.Manager", "ControlGroupHierarchy", bus_property_append_string, "s", m->cgroup_hierarchy },
                 { NULL, NULL, NULL, NULL, NULL }
         };
 
@@ -205,6 +253,7 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
         DBusMessage *reply = NULL;
         char * path = NULL;
         JobType job_type = _JOB_TYPE_INVALID;
+        bool reload_if_possible = false;
 
         assert(connection);
         assert(message);
@@ -212,11 +261,6 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
 
         dbus_error_init(&error);
 
-        log_debug("Got D-Bus request: %s.%s() on %s",
-                  dbus_message_get_interface(message),
-                  dbus_message_get_member(message),
-                  dbus_message_get_path(message));
-
         if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnit")) {
                 const char *name;
                 Unit *u;
@@ -228,8 +272,10 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
                                     DBUS_TYPE_INVALID))
                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 
-                if (!(u = manager_get_unit(m, name)))
-                        return bus_send_error_reply(m, connection, message, NULL, -ENOENT);
+                if (!(u = manager_get_unit(m, name))) {
+                        dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
+                        return bus_send_error_reply(m, connection, message, &error, -ENOENT);
+                }
 
                 if (!(reply = dbus_message_new_method_return(message)))
                         goto oom;
@@ -254,8 +300,8 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
                                     DBUS_TYPE_INVALID))
                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 
-                if ((r = manager_load_unit(m, name, NULL, &u)) < 0)
-                        return bus_send_error_reply(m, connection, message, NULL, r);
+                if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
+                        return bus_send_error_reply(m, connection, message, &error, r);
 
                 if (!(reply = dbus_message_new_method_return(message)))
                         goto oom;
@@ -277,7 +323,15 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
                 job_type = JOB_RELOAD;
         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "RestartUnit"))
                 job_type = JOB_RESTART;
-        else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetJob")) {
+        else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "TryRestartUnit"))
+                job_type = JOB_TRY_RESTART;
+        else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrRestartUnit")) {
+                reload_if_possible = true;
+                job_type = JOB_RESTART;
+        } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrTryRestartUnit")) {
+                reload_if_possible = true;
+                job_type = JOB_TRY_RESTART;
+        } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetJob")) {
                 uint32_t id;
                 Job *j;
 
@@ -288,8 +342,10 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
                                     DBUS_TYPE_INVALID))
                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 
-                if (!(j = manager_get_job(m, id)))
-                        return bus_send_error_reply(m, connection, message, NULL, -ENOENT);
+                if (!(j = manager_get_job(m, id))) {
+                        dbus_set_error(&error, BUS_ERROR_NO_SUCH_JOB, "Job %u does not exist.", (unsigned) id);
+                        return bus_send_error_reply(m, connection, message, &error, -ENOENT);
+                }
 
                 if (!(reply = dbus_message_new_method_return(message)))
                         goto oom;
@@ -310,6 +366,34 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
                 if (!(reply = dbus_message_new_method_return(message)))
                         goto oom;
 
+        } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetMaintenance")) {
+
+                manager_reset_maintenance(m);
+
+                if (!(reply = dbus_message_new_method_return(message)))
+                        goto oom;
+
+        } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetMaintenanceUnit")) {
+                const char *name;
+                Unit *u;
+
+                if (!dbus_message_get_args(
+                                    message,
+                                    &error,
+                                    DBUS_TYPE_STRING, &name,
+                                    DBUS_TYPE_INVALID))
+                        return bus_send_error_reply(m, connection, message, &error, -EINVAL);
+
+                if (!(u = manager_get_unit(m, name))) {
+                        dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
+                        return bus_send_error_reply(m, connection, message, &error, -ENOENT);
+                }
+
+                unit_reset_maintenance(u);
+
+                if (!(reply = dbus_message_new_method_return(message)))
+                        goto oom;
+
         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListUnits")) {
                 DBusMessageIter iter, sub;
                 Iterator i;
@@ -442,14 +526,25 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
 
         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Subscribe")) {
                 char *client;
+                Set *s;
 
-                if (!(client = strdup(dbus_message_get_sender(message))))
-                        goto oom;
+                if (!(s = BUS_CONNECTION_SUBSCRIBED(m, connection))) {
+                        if (!(s = set_new(string_hash_func, string_compare_func)))
+                                goto oom;
+
+                        if (!(dbus_connection_set_data(connection, m->subscribed_data_slot, s, NULL))) {
+                                set_free(s);
+                                goto oom;
+                        }
+                }
 
-                r = set_put(m->subscribed, client);
+                if (!(client = strdup(message_get_sender_with_fallback(message))))
+                        goto oom;
 
-                if (r < 0)
+                if ((r = set_put(s, client)) < 0) {
+                        free(client);
                         return bus_send_error_reply(m, connection, message, NULL, r);
+                }
 
                 if (!(reply = dbus_message_new_method_return(message)))
                         goto oom;
@@ -457,8 +552,10 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Unsubscribe")) {
                 char *client;
 
-                if (!(client = set_remove(m->subscribed, (char*) dbus_message_get_sender(message))))
-                        return bus_send_error_reply(m, connection, message, NULL, -ENOENT);
+                if (!(client = set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) message_get_sender_with_fallback(message)))) {
+                        dbus_set_error(&error, BUS_ERROR_NOT_SUBSCRIBED, "Client is not subscribed.");
+                        return bus_send_error_reply(m, connection, message, &error, -ENOENT);
+                }
 
                 free(client);
 
@@ -509,8 +606,8 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
                 if (name && name[0] == 0)
                         name = NULL;
 
-                if ((r = snapshot_create(m, name, cleanup, &s)) < 0)
-                        return bus_send_error_reply(m, connection, message, NULL, r);
+                if ((r = snapshot_create(m, name, cleanup, &error, &s)) < 0)
+                        return bus_send_error_reply(m, connection, message, &error, r);
 
                 if (!(reply = dbus_message_new_method_return(message)))
                         goto oom;
@@ -597,6 +694,7 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
                 if (!(m->queued_message = dbus_message_new_method_return(message)))
                         goto oom;
 
+                m->queued_message_connection = connection;
                 m->exit_code = MANAGER_RELOAD;
 
         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reexecute")) {
@@ -608,8 +706,10 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
 
         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Exit")) {
 
-                if (m->running_as == MANAGER_SYSTEM)
-                        return bus_send_error_reply(m, connection, message, NULL, -ENOTSUP);
+                if (m->running_as == MANAGER_SYSTEM) {
+                        dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Exit is only supported for session managers.");
+                        return bus_send_error_reply(m, connection, message, &error, -ENOTSUP);
+                }
 
                 if (!(reply = dbus_message_new_method_return(message)))
                         goto oom;
@@ -665,7 +765,6 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
         } else
                 return bus_default_message_handler(m, connection, message, NULL, properties);
 
-
         if (job_type != _JOB_TYPE_INVALID) {
                 const char *name, *smode;
                 JobMode mode;
@@ -680,17 +779,33 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
                                     DBUS_TYPE_INVALID))
                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 
-                if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID)
-                        return bus_send_error_reply(m, connection, message, NULL, -EINVAL);
+                if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) {
+                        dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
+                        return bus_send_error_reply(m, connection, message, &error, -EINVAL);
+                }
 
-                if ((r = manager_load_unit(m, name, NULL, &u)) < 0)
-                        return bus_send_error_reply(m, connection, message, NULL, r);
+                if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
+                        return bus_send_error_reply(m, connection, message, &error, r);
 
-                if (job_type == JOB_START && u->meta.only_by_dependency)
-                        return bus_send_error_reply(m, connection, message, NULL, -EPERM);
+                if (reload_if_possible && unit_can_reload(u)) {
+                        if (job_type == JOB_RESTART)
+                                job_type = JOB_RELOAD_OR_START;
+                        else if (job_type == JOB_TRY_RESTART)
+                                job_type = JOB_RELOAD;
+                }
 
-                if ((r = manager_add_job(m, job_type, u, mode, true, &j)) < 0)
-                        return bus_send_error_reply(m, connection, message, NULL, r);
+                if (job_type == JOB_START && u->meta.only_by_dependency) {
+                        dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Unit may be activated by dependency only.");
+                        return bus_send_error_reply(m, connection, message, &error, -EPERM);
+                }
+
+                if ((r = manager_add_job(m, job_type, u, mode, true, &error, &j)) < 0)
+                        return bus_send_error_reply(m, connection, message, &error, r);
+
+                if (!(j->bus_client = strdup(message_get_sender_with_fallback(message))))
+                        goto oom;
+
+                j->bus = connection;
 
                 if (!(reply = dbus_message_new_method_return(message)))
                         goto oom;