| /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
| |
| /*** |
| This file is part of systemd. |
| |
| Copyright 2010 Lennart Poettering |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include <errno.h> |
| |
| #include "dbus.h" |
| #include "log.h" |
| #include "dbus-unit.h" |
| #include "bus-errors.h" |
| #include "dbus-common.h" |
| #include "selinux-access.h" |
| #include "cgroup-util.h" |
| #include "strv.h" |
| #include "path-util.h" |
| #include "fileio.h" |
| |
| const char bus_unit_interface[] _introspect_("Unit") = BUS_UNIT_INTERFACE; |
| |
| #define INVALIDATING_PROPERTIES \ |
| "LoadState\0" \ |
| "ActiveState\0" \ |
| "SubState\0" \ |
| "InactiveExitTimestamp\0" \ |
| "ActiveEnterTimestamp\0" \ |
| "ActiveExitTimestamp\0" \ |
| "InactiveEnterTimestamp\0" \ |
| "Job\0" \ |
| "NeedDaemonReload\0" |
| |
| static int bus_unit_append_names(DBusMessageIter *i, const char *property, void *data) { |
| char *t; |
| Iterator j; |
| DBusMessageIter sub; |
| Unit *u = data; |
| |
| if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub)) |
| return -ENOMEM; |
| |
| SET_FOREACH(t, u->names, j) |
| if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t)) |
| return -ENOMEM; |
| |
| if (!dbus_message_iter_close_container(i, &sub)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_unit_append_following(DBusMessageIter *i, const char *property, void *data) { |
| Unit *u = data, *f; |
| const char *d; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| f = unit_following(u); |
| d = f ? f->id : ""; |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_unit_append_slice(DBusMessageIter *i, const char *property, void *data) { |
| Unit *u = data; |
| const char *d; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| d = strempty(unit_slice_name(u)); |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_unit_append_dependencies(DBusMessageIter *i, const char *property, void *data) { |
| Unit *u; |
| Iterator j; |
| DBusMessageIter sub; |
| Set *s = data; |
| |
| if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub)) |
| return -ENOMEM; |
| |
| SET_FOREACH(u, s, j) |
| if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &u->id)) |
| return -ENOMEM; |
| |
| if (!dbus_message_iter_close_container(i, &sub)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_unit_append_description(DBusMessageIter *i, const char *property, void *data) { |
| Unit *u = data; |
| const char *d; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| d = unit_description(u); |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_unit_append_load_state, unit_load_state, UnitLoadState); |
| |
| static int bus_unit_append_active_state(DBusMessageIter *i, const char *property, void *data) { |
| Unit *u = data; |
| const char *state; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| state = unit_active_state_to_string(unit_active_state(u)); |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_unit_append_sub_state(DBusMessageIter *i, const char *property, void *data) { |
| Unit *u = data; |
| const char *state; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| state = unit_sub_state_to_string(u); |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_unit_append_file_state(DBusMessageIter *i, const char *property, void *data) { |
| Unit *u = data; |
| const char *state; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| state = strempty(unit_file_state_to_string(unit_get_unit_file_state(u))); |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_unit_append_can_start(DBusMessageIter *i, const char *property, void *data) { |
| Unit *u = data; |
| dbus_bool_t b; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| b = unit_can_start(u) && |
| !u->refuse_manual_start; |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_unit_append_can_stop(DBusMessageIter *i, const char *property, void *data) { |
| Unit *u = data; |
| dbus_bool_t b; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| /* On the lower levels we assume that every unit we can start |
| * we can also stop */ |
| |
| b = unit_can_start(u) && |
| !u->refuse_manual_stop; |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_unit_append_can_reload(DBusMessageIter *i, const char *property, void *data) { |
| Unit *u = data; |
| dbus_bool_t b; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| b = unit_can_reload(u); |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_unit_append_can_isolate(DBusMessageIter *i, const char *property, void *data) { |
| Unit *u = data; |
| dbus_bool_t b; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| b = unit_can_isolate(u) && |
| !u->refuse_manual_start; |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_unit_append_job(DBusMessageIter *i, const char *property, void *data) { |
| Unit *u = data; |
| DBusMessageIter sub; |
| _cleanup_free_ char *p = NULL; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub)) |
| return -ENOMEM; |
| |
| if (u->job) { |
| |
| p = job_dbus_path(u->job); |
| if (!p) |
| return -ENOMEM; |
| |
| if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &u->job->id) || |
| !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) |
| return -ENOMEM; |
| } else { |
| uint32_t id = 0; |
| |
| /* No job, so let's fill in some placeholder |
| * data. Since we need to fill in a valid path we |
| * simple point to ourselves. */ |
| |
| p = unit_dbus_path(u); |
| if (!p) |
| return -ENOMEM; |
| |
| if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &id) || |
| !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) |
| return -ENOMEM; |
| } |
| |
| if (!dbus_message_iter_close_container(i, &sub)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_unit_append_need_daemon_reload(DBusMessageIter *i, const char *property, void *data) { |
| Unit *u = data; |
| dbus_bool_t b; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| b = unit_need_daemon_reload(u); |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_property_append_condition(DBusMessageIter *i, const char *property, void *data) { |
| Condition **cp = data; |
| Condition *c; |
| const char *name, *param; |
| dbus_bool_t trigger, negate; |
| dbus_int32_t state; |
| DBusMessageIter sub; |
| |
| assert(i); |
| assert(property); |
| assert(cp); |
| |
| c = *cp; |
| assert(c); |
| |
| name = condition_type_to_string(c->type); |
| param = c->parameter; |
| trigger = c->trigger; |
| negate = c->negate; |
| state = c->state; |
| |
| if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub) || |
| !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &name) || |
| !dbus_message_iter_append_basic(&sub, DBUS_TYPE_BOOLEAN, &trigger) || |
| !dbus_message_iter_append_basic(&sub, DBUS_TYPE_BOOLEAN, &negate) || |
| !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, ¶m) || |
| !dbus_message_iter_append_basic(&sub, DBUS_TYPE_INT32, &state) || |
| !dbus_message_iter_close_container(i, &sub)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_property_append_condition_list(DBusMessageIter *i, const char *property, void *data) { |
| Condition **first = data, *c; |
| DBusMessageIter sub; |
| |
| assert(i); |
| assert(data); |
| |
| if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(sbbsi)", &sub)) |
| return -ENOMEM; |
| |
| LIST_FOREACH(conditions, c, *first) |
| bus_property_append_condition(&sub, property, &c); |
| |
| if (!dbus_message_iter_close_container(i, &sub)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_unit_append_load_error(DBusMessageIter *i, const char *property, void *data) { |
| Unit *u = data; |
| const char *name, *message; |
| DBusMessageIter sub; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| if (u->load_error != 0) { |
| name = bus_errno_to_dbus(u->load_error); |
| message = strempty(strerror(-u->load_error)); |
| } else |
| name = message = ""; |
| |
| if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub) || |
| !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &name) || |
| !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &message) || |
| !dbus_message_iter_close_container(i, &sub)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static DBusHandlerResult bus_unit_message_dispatch(Unit *u, DBusConnection *connection, DBusMessage *message) { |
| _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; |
| DBusError error; |
| JobType job_type = _JOB_TYPE_INVALID; |
| bool reload_if_possible = false; |
| int r; |
| |
| dbus_error_init(&error); |
| |
| if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Start")) |
| job_type = JOB_START; |
| else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Stop")) |
| job_type = JOB_STOP; |
| else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Reload")) |
| job_type = JOB_RELOAD; |
| else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Restart")) |
| job_type = JOB_RESTART; |
| else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "TryRestart")) |
| job_type = JOB_TRY_RESTART; |
| else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "ReloadOrRestart")) { |
| reload_if_possible = true; |
| job_type = JOB_RESTART; |
| } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "ReloadOrTryRestart")) { |
| reload_if_possible = true; |
| job_type = JOB_TRY_RESTART; |
| } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Kill")) { |
| const char *swho; |
| int32_t signo; |
| KillWho who; |
| |
| if (!dbus_message_get_args( |
| message, |
| &error, |
| DBUS_TYPE_STRING, &swho, |
| DBUS_TYPE_INT32, &signo, |
| DBUS_TYPE_INVALID)) |
| return bus_send_error_reply(connection, message, &error, -EINVAL); |
| |
| if (isempty(swho)) |
| who = KILL_ALL; |
| else { |
| who = kill_who_from_string(swho); |
| if (who < 0) |
| return bus_send_error_reply(connection, message, &error, -EINVAL); |
| } |
| |
| if (signo <= 0 || signo >= _NSIG) |
| return bus_send_error_reply(connection, message, &error, -EINVAL); |
| |
| SELINUX_UNIT_ACCESS_CHECK(u, connection, message, "stop"); |
| |
| r = unit_kill(u, who, signo, &error); |
| if (r < 0) |
| return bus_send_error_reply(connection, message, &error, r); |
| |
| reply = dbus_message_new_method_return(message); |
| if (!reply) |
| goto oom; |
| |
| } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "ResetFailed")) { |
| |
| SELINUX_UNIT_ACCESS_CHECK(u, connection, message, "reload"); |
| |
| unit_reset_failed(u); |
| |
| reply = dbus_message_new_method_return(message); |
| if (!reply) |
| goto oom; |
| } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "SetProperties")) { |
| DBusMessageIter iter; |
| dbus_bool_t runtime; |
| |
| if (!dbus_message_iter_init(message, &iter)) |
| goto oom; |
| |
| if (bus_iter_get_basic_and_next(&iter, DBUS_TYPE_BOOLEAN, &runtime, true) < 0) |
| return bus_send_error_reply(connection, message, NULL, -EINVAL); |
| |
| SELINUX_UNIT_ACCESS_CHECK(u, connection, message, "start"); |
| |
| r = bus_unit_set_properties(u, &iter, runtime ? UNIT_RUNTIME : UNIT_PERSISTENT, true, &error); |
| if (r < 0) |
| return bus_send_error_reply(connection, message, &error, r); |
| |
| reply = dbus_message_new_method_return(message); |
| if (!reply) |
| goto oom; |
| |
| } else if (UNIT_VTABLE(u)->bus_message_handler) |
| return UNIT_VTABLE(u)->bus_message_handler(u, connection, message); |
| else |
| return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; |
| |
| if (job_type != _JOB_TYPE_INVALID) { |
| const char *smode; |
| JobMode mode; |
| |
| if (!dbus_message_get_args( |
| message, |
| &error, |
| DBUS_TYPE_STRING, &smode, |
| DBUS_TYPE_INVALID)) |
| return bus_send_error_reply(connection, message, &error, -EINVAL); |
| |
| mode = job_mode_from_string(smode); |
| if (mode < 0) { |
| dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode); |
| return bus_send_error_reply(connection, message, &error, -EINVAL); |
| } |
| |
| return bus_unit_queue_job(connection, message, u, job_type, mode, reload_if_possible); |
| } |
| |
| if (reply) |
| if (!bus_maybe_send_reply(connection, message, reply)) |
| goto oom; |
| |
| return DBUS_HANDLER_RESULT_HANDLED; |
| |
| oom: |
| dbus_error_free(&error); |
| return DBUS_HANDLER_RESULT_NEED_MEMORY; |
| } |
| |
| static DBusHandlerResult bus_unit_message_handler(DBusConnection *connection, DBusMessage *message, void *data) { |
| Manager *m = data; |
| Unit *u; |
| int r; |
| _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; |
| DBusError error; |
| |
| assert(connection); |
| assert(message); |
| assert(m); |
| |
| dbus_error_init(&error); |
| |
| if (streq(dbus_message_get_path(message), "/org/freedesktop/systemd1/unit")) { |
| /* Be nice to gdbus and return introspection data for our mid-level paths */ |
| |
| SELINUX_ACCESS_CHECK(connection, message, "status"); |
| |
| if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) { |
| char *introspection = NULL; |
| FILE *f; |
| Iterator i; |
| const char *k; |
| size_t size; |
| |
| reply = dbus_message_new_method_return(message); |
| if (!reply) |
| goto oom; |
| |
| /* We roll our own introspection code here, instead of |
| * relying on bus_default_message_handler() because we |
| * need to generate our introspection string |
| * dynamically. */ |
| |
| f = open_memstream(&introspection, &size); |
| if (!f) |
| goto oom; |
| |
| fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE |
| "<node>\n", f); |
| |
| fputs(BUS_INTROSPECTABLE_INTERFACE, f); |
| fputs(BUS_PEER_INTERFACE, f); |
| |
| HASHMAP_FOREACH_KEY(u, k, m->units, i) { |
| char *p; |
| |
| if (k != u->id) |
| continue; |
| |
| p = bus_path_escape(k); |
| if (!p) { |
| fclose(f); |
| free(introspection); |
| goto oom; |
| } |
| |
| fprintf(f, "<node name=\"%s\"/>", p); |
| free(p); |
| } |
| |
| fputs("</node>\n", f); |
| |
| if (ferror(f)) { |
| fclose(f); |
| free(introspection); |
| goto oom; |
| } |
| |
| fclose(f); |
| |
| if (!introspection) |
| goto oom; |
| |
| if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) { |
| free(introspection); |
| goto oom; |
| } |
| |
| free(introspection); |
| |
| if (!bus_maybe_send_reply(connection, message, reply)) |
| goto oom; |
| |
| return DBUS_HANDLER_RESULT_HANDLED; |
| } |
| |
| return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; |
| } |
| |
| r = manager_load_unit_from_dbus_path(m, dbus_message_get_path(message), &error, &u); |
| if (r == -ENOMEM) |
| goto oom; |
| if (r < 0) |
| return bus_send_error_reply(connection, message, &error, r); |
| |
| return bus_unit_message_dispatch(u, connection, message); |
| |
| oom: |
| dbus_error_free(&error); |
| |
| return DBUS_HANDLER_RESULT_NEED_MEMORY; |
| } |
| |
| const DBusObjectPathVTable bus_unit_vtable = { |
| .message_function = bus_unit_message_handler |
| }; |
| |
| void bus_unit_send_change_signal(Unit *u) { |
| _cleanup_dbus_message_unref_ DBusMessage *m = NULL; |
| _cleanup_free_ char *p = NULL; |
| int r; |
| |
| assert(u); |
| |
| if (u->in_dbus_queue) { |
| LIST_REMOVE(Unit, dbus_queue, u->manager->dbus_unit_queue, u); |
| u->in_dbus_queue = false; |
| } |
| |
| if (!u->id) |
| return; |
| |
| if (!bus_has_subscriber(u->manager)) { |
| u->sent_dbus_new_signal = true; |
| return; |
| } |
| |
| p = unit_dbus_path(u); |
| if (!p) { |
| log_oom(); |
| return; |
| } |
| |
| if (u->sent_dbus_new_signal) { |
| /* Send a properties changed signal. First for the |
| * specific type, then for the generic unit. The |
| * clients may rely on this order to get atomic |
| * behavior if needed. */ |
| |
| if (UNIT_VTABLE(u)->bus_invalidating_properties) { |
| |
| m = bus_properties_changed_new(p, |
| UNIT_VTABLE(u)->bus_interface, |
| UNIT_VTABLE(u)->bus_invalidating_properties); |
| if (!m) { |
| log_oom(); |
| return; |
| } |
| |
| r = bus_broadcast(u->manager, m); |
| if (r < 0) { |
| log_error("Failed to broadcast change message: %s", strerror(-r)); |
| return; |
| } |
| |
| dbus_message_unref(m); |
| } |
| |
| m = bus_properties_changed_new(p, "org.freedesktop.systemd1.Unit", |
| INVALIDATING_PROPERTIES); |
| if (!m) { |
| log_oom(); |
| return; |
| } |
| |
| } else { |
| /* Send a new signal */ |
| |
| m = dbus_message_new_signal("/org/freedesktop/systemd1", |
| "org.freedesktop.systemd1.Manager", |
| "UnitNew"); |
| if (!m) { |
| log_oom(); |
| return; |
| } |
| |
| if (!dbus_message_append_args(m, |
| DBUS_TYPE_STRING, &u->id, |
| DBUS_TYPE_OBJECT_PATH, &p, |
| DBUS_TYPE_INVALID)) { |
| log_oom(); |
| return; |
| } |
| } |
| |
| r = bus_broadcast(u->manager, m); |
| if (r < 0) { |
| log_error("Failed to broadcast UnitNew/PropertiesChanged message."); |
| return; |
| } |
| |
| u->sent_dbus_new_signal = true; |
| } |
| |
| void bus_unit_send_removed_signal(Unit *u) { |
| _cleanup_free_ char *p = NULL; |
| _cleanup_dbus_message_unref_ DBusMessage *m = NULL; |
| |
| assert(u); |
| |
| if (!bus_has_subscriber(u->manager)) |
| return; |
| |
| if (!u->sent_dbus_new_signal) |
| bus_unit_send_change_signal(u); |
| |
| if (!u->id) |
| return; |
| |
| p = unit_dbus_path(u); |
| if (!p) |
| goto oom; |
| |
| m = dbus_message_new_signal("/org/freedesktop/systemd1", |
| "org.freedesktop.systemd1.Manager", |
| "UnitRemoved"); |
| if (!m) |
| goto oom; |
| |
| if (!dbus_message_append_args(m, |
| DBUS_TYPE_STRING, &u->id, |
| DBUS_TYPE_OBJECT_PATH, &p, |
| DBUS_TYPE_INVALID)) |
| goto oom; |
| |
| if (bus_broadcast(u->manager, m) < 0) |
| goto oom; |
| |
| return; |
| |
| oom: |
| log_oom(); |
| } |
| |
| DBusHandlerResult bus_unit_queue_job( |
| DBusConnection *connection, |
| DBusMessage *message, |
| Unit *u, |
| JobType type, |
| JobMode mode, |
| bool reload_if_possible) { |
| |
| _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; |
| _cleanup_free_ char *path = NULL; |
| Job *j; |
| JobBusClient *cl; |
| DBusError error; |
| int r; |
| |
| assert(connection); |
| assert(message); |
| assert(u); |
| assert(type >= 0 && type < _JOB_TYPE_MAX); |
| assert(mode >= 0 && mode < _JOB_MODE_MAX); |
| |
| dbus_error_init(&error); |
| |
| if (reload_if_possible && unit_can_reload(u)) { |
| if (type == JOB_RESTART) |
| type = JOB_RELOAD_OR_START; |
| else if (type == JOB_TRY_RESTART) |
| type = JOB_RELOAD; |
| } |
| |
| SELINUX_UNIT_ACCESS_CHECK(u, connection, message, |
| (type == JOB_START || type == JOB_RESTART || type == JOB_TRY_RESTART) ? "start" : |
| type == JOB_STOP ? "stop" : "reload"); |
| |
| if (type == JOB_STOP && (u->load_state == UNIT_NOT_FOUND || u->load_state == UNIT_ERROR) && unit_active_state(u) == UNIT_INACTIVE) { |
| dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s not loaded.", u->id); |
| return bus_send_error_reply(connection, message, &error, -EPERM); |
| } |
| |
| if ((type == JOB_START && u->refuse_manual_start) || |
| (type == JOB_STOP && u->refuse_manual_stop) || |
| ((type == JOB_RESTART || type == JOB_TRY_RESTART) && (u->refuse_manual_start || u->refuse_manual_stop))) { |
| dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, |
| "Operation refused, unit %s may be requested by dependency only.", u->id); |
| return bus_send_error_reply(connection, message, &error, -EPERM); |
| } |
| |
| r = manager_add_job(u->manager, type, u, mode, true, &error, &j); |
| if (r < 0) |
| return bus_send_error_reply(connection, message, &error, r); |
| |
| cl = job_bus_client_new(connection, bus_message_get_sender_with_fallback(message)); |
| if (!cl) |
| goto oom; |
| |
| LIST_PREPEND(JobBusClient, client, j->bus_client_list, cl); |
| |
| reply = dbus_message_new_method_return(message); |
| if (!reply) |
| goto oom; |
| |
| path = job_dbus_path(j); |
| if (!path) |
| goto oom; |
| |
| if (!dbus_message_append_args( |
| reply, |
| DBUS_TYPE_OBJECT_PATH, &path, |
| DBUS_TYPE_INVALID)) |
| goto oom; |
| |
| if (!bus_maybe_send_reply(connection, message, reply)) |
| goto oom; |
| |
| return DBUS_HANDLER_RESULT_HANDLED; |
| |
| oom: |
| dbus_error_free(&error); |
| |
| return DBUS_HANDLER_RESULT_NEED_MEMORY; |
| } |
| |
| static int bus_unit_set_transient_property( |
| Unit *u, |
| const char *name, |
| DBusMessageIter *i, |
| UnitSetPropertiesMode mode, |
| DBusError *error) { |
| |
| int r; |
| |
| assert(u); |
| assert(name); |
| assert(i); |
| |
| if (streq(name, "Description")) { |
| if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_STRING) |
| return -EINVAL; |
| |
| if (mode != UNIT_CHECK) { |
| const char *description; |
| |
| dbus_message_iter_get_basic(i, &description); |
| |
| r = unit_set_description(u, description); |
| if (r < 0) |
| return r; |
| |
| unit_write_drop_in_format(u, mode, name, "[Unit]\nDescription=%s\n", description); |
| } |
| |
| return 1; |
| |
| } else if (streq(name, "Slice") && unit_get_cgroup_context(u)) { |
| const char *s; |
| |
| if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_STRING) |
| return -EINVAL; |
| |
| dbus_message_iter_get_basic(i, &s); |
| |
| if (isempty(s)) { |
| if (mode != UNIT_CHECK) { |
| unit_ref_unset(&u->slice); |
| unit_remove_drop_in(u, mode, name); |
| } |
| } else { |
| Unit *slice; |
| |
| r = manager_load_unit(u->manager, s, NULL, error, &slice); |
| if (r < 0) |
| return r; |
| |
| if (slice->type != UNIT_SLICE) |
| return -EINVAL; |
| |
| if (mode != UNIT_CHECK) { |
| unit_ref_set(&u->slice, slice); |
| unit_write_drop_in_private_format(u, mode, name, "Slice=%s\n", s); |
| } |
| } |
| |
| return 1; |
| |
| } else if (streq(name, "Requires") || |
| streq(name, "RequiresOverridable") || |
| streq(name, "Requisite") || |
| streq(name, "RequisiteOverridable") || |
| streq(name, "Wants") || |
| streq(name, "BindsTo") || |
| streq(name, "Conflicts") || |
| streq(name, "Before") || |
| streq(name, "After") || |
| streq(name, "OnFailure") || |
| streq(name, "PropagatesReloadTo") || |
| streq(name, "ReloadPropagatedFrom") || |
| streq(name, "PartOf")) { |
| |
| UnitDependency d; |
| DBusMessageIter sub; |
| |
| d = unit_dependency_from_string(name); |
| if (d < 0) |
| return -EINVAL; |
| |
| if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_ARRAY || |
| dbus_message_iter_get_element_type(i) != DBUS_TYPE_STRING) |
| return -EINVAL; |
| |
| dbus_message_iter_recurse(i, &sub); |
| while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING) { |
| const char *other; |
| |
| dbus_message_iter_get_basic(&sub, &other); |
| |
| if (!unit_name_is_valid(other, false)) |
| return -EINVAL; |
| |
| if (mode != UNIT_CHECK) { |
| _cleanup_free_ char *label = NULL; |
| |
| r = unit_add_dependency_by_name(u, d, other, NULL, true); |
| if (r < 0) |
| return r; |
| |
| label = strjoin(name, "-", other, NULL); |
| if (!label) |
| return -ENOMEM; |
| |
| unit_write_drop_in_format(u, mode, label, "[Unit]\n%s=%s\n", name, other); |
| } |
| |
| dbus_message_iter_next(&sub); |
| } |
| |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| int bus_unit_set_properties( |
| Unit *u, |
| DBusMessageIter *iter, |
| UnitSetPropertiesMode mode, |
| bool commit, |
| DBusError *error) { |
| |
| bool for_real = false; |
| DBusMessageIter sub; |
| unsigned n = 0; |
| int r; |
| |
| assert(u); |
| assert(iter); |
| |
| if (u->transient) |
| mode &= UNIT_RUNTIME; |
| |
| /* We iterate through the array twice. First run we just check |
| * if all passed data is valid, second run actually applies |
| * it. This is to implement transaction-like behaviour without |
| * actually providing full transactions. */ |
| |
| if (dbus_message_iter_get_arg_type(iter) != DBUS_TYPE_ARRAY || |
| dbus_message_iter_get_element_type(iter) != DBUS_TYPE_STRUCT) |
| return -EINVAL; |
| |
| dbus_message_iter_recurse(iter, &sub); |
| for (;;) { |
| DBusMessageIter sub2, sub3; |
| const char *name; |
| |
| if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_INVALID) { |
| |
| if (for_real) |
| break; |
| |
| /* Reached EOF. Let's try again, and this time for realz... */ |
| dbus_message_iter_recurse(iter, &sub); |
| for_real = true; |
| continue; |
| } |
| |
| if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) |
| return -EINVAL; |
| |
| dbus_message_iter_recurse(&sub, &sub2); |
| |
| if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 || |
| dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT) |
| return -EINVAL; |
| |
| if (!UNIT_VTABLE(u)->bus_set_property) { |
| dbus_set_error(error, DBUS_ERROR_PROPERTY_READ_ONLY, "Objects of this type do not support setting properties."); |
| return -ENOENT; |
| } |
| |
| dbus_message_iter_recurse(&sub2, &sub3); |
| r = UNIT_VTABLE(u)->bus_set_property(u, name, &sub3, for_real ? mode : UNIT_CHECK, error); |
| if (r == 0 && u->transient && u->load_state == UNIT_STUB) |
| r = bus_unit_set_transient_property(u, name, &sub3, for_real ? mode : UNIT_CHECK, error); |
| if (r < 0) |
| return r; |
| if (r == 0) { |
| dbus_set_error(error, DBUS_ERROR_PROPERTY_READ_ONLY, "Cannot set property %s, or unknown property.", name); |
| return -ENOENT; |
| } |
| |
| dbus_message_iter_next(&sub); |
| |
| n += for_real; |
| } |
| |
| if (commit && n > 0 && UNIT_VTABLE(u)->bus_commit_properties) |
| UNIT_VTABLE(u)->bus_commit_properties(u); |
| |
| return n; |
| } |
| |
| const BusProperty bus_unit_properties[] = { |
| { "Id", bus_property_append_string, "s", offsetof(Unit, id), true }, |
| { "Names", bus_unit_append_names, "as", 0 }, |
| { "Following", bus_unit_append_following, "s", 0 }, |
| { "Requires", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_REQUIRES]), true }, |
| { "RequiresOverridable", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_REQUIRES_OVERRIDABLE]), true }, |
| { "Requisite", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_REQUISITE]), true }, |
| { "RequisiteOverridable", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_REQUISITE_OVERRIDABLE]), true }, |
| { "Wants", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_WANTS]), true }, |
| { "BindsTo", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_BINDS_TO]), true }, |
| { "PartOf", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_PART_OF]), true }, |
| { "RequiredBy", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_REQUIRED_BY]), true }, |
| { "RequiredByOverridable", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_REQUIRED_BY_OVERRIDABLE]), true }, |
| { "WantedBy", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_WANTED_BY]), true }, |
| { "BoundBy", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_BOUND_BY]), true }, |
| { "ConsistsOf", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_CONSISTS_OF]), true }, |
| { "Conflicts", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_CONFLICTS]), true }, |
| { "ConflictedBy", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_CONFLICTED_BY]), true }, |
| { "Before", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_BEFORE]), true }, |
| { "After", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_AFTER]), true }, |
| { "OnFailure", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_ON_FAILURE]), true }, |
| { "Triggers", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_TRIGGERS]), true }, |
| { "TriggeredBy", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_TRIGGERED_BY]), true }, |
| { "PropagatesReloadTo", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_PROPAGATES_RELOAD_TO]), true }, |
| { "ReloadPropagatedFrom", bus_unit_append_dependencies, "as", offsetof(Unit, dependencies[UNIT_RELOAD_PROPAGATED_FROM]), true }, |
| { "RequiresMountsFor", bus_property_append_strv, "as", offsetof(Unit, requires_mounts_for), true }, |
| { "Documentation", bus_property_append_strv, "as", offsetof(Unit, documentation), true }, |
| { "Description", bus_unit_append_description, "s", 0 }, |
| { "LoadState", bus_unit_append_load_state, "s", offsetof(Unit, load_state) }, |
| { "ActiveState", bus_unit_append_active_state, "s", 0 }, |
| { "SubState", bus_unit_append_sub_state, "s", 0 }, |
| { "FragmentPath", bus_property_append_string, "s", offsetof(Unit, fragment_path), true }, |
| { "SourcePath", bus_property_append_string, "s", offsetof(Unit, source_path), true }, |
| { "DropInPaths", bus_property_append_strv, "as", offsetof(Unit, dropin_paths), true }, |
| { "UnitFileState", bus_unit_append_file_state, "s", 0 }, |
| { "InactiveExitTimestamp", bus_property_append_usec, "t", offsetof(Unit, inactive_exit_timestamp.realtime) }, |
| { "InactiveExitTimestampMonotonic", bus_property_append_usec, "t", offsetof(Unit, inactive_exit_timestamp.monotonic) }, |
| { "ActiveEnterTimestamp", bus_property_append_usec, "t", offsetof(Unit, active_enter_timestamp.realtime) }, |
| { "ActiveEnterTimestampMonotonic", bus_property_append_usec, "t", offsetof(Unit, active_enter_timestamp.monotonic) }, |
| { "ActiveExitTimestamp", bus_property_append_usec, "t", offsetof(Unit, active_exit_timestamp.realtime) }, |
| { "ActiveExitTimestampMonotonic", bus_property_append_usec, "t", offsetof(Unit, active_exit_timestamp.monotonic) }, |
| { "InactiveEnterTimestamp", bus_property_append_usec, "t", offsetof(Unit, inactive_enter_timestamp.realtime) }, |
| { "InactiveEnterTimestampMonotonic", bus_property_append_usec, "t", offsetof(Unit, inactive_enter_timestamp.monotonic) }, |
| { "CanStart", bus_unit_append_can_start, "b", 0 }, |
| { "CanStop", bus_unit_append_can_stop, "b", 0 }, |
| { "CanReload", bus_unit_append_can_reload, "b", 0 }, |
| { "CanIsolate", bus_unit_append_can_isolate, "b", 0 }, |
| { "Job", bus_unit_append_job, "(uo)", 0 }, |
| { "StopWhenUnneeded", bus_property_append_bool, "b", offsetof(Unit, stop_when_unneeded) }, |
| { "RefuseManualStart", bus_property_append_bool, "b", offsetof(Unit, refuse_manual_start) }, |
| { "RefuseManualStop", bus_property_append_bool, "b", offsetof(Unit, refuse_manual_stop) }, |
| { "AllowIsolate", bus_property_append_bool, "b", offsetof(Unit, allow_isolate) }, |
| { "DefaultDependencies", bus_property_append_bool, "b", offsetof(Unit, default_dependencies) }, |
| { "OnFailureIsolate", bus_property_append_bool, "b", offsetof(Unit, on_failure_isolate) }, |
| { "IgnoreOnIsolate", bus_property_append_bool, "b", offsetof(Unit, ignore_on_isolate) }, |
| { "IgnoreOnSnapshot", bus_property_append_bool, "b", offsetof(Unit, ignore_on_snapshot) }, |
| { "NeedDaemonReload", bus_unit_append_need_daemon_reload, "b", 0 }, |
| { "JobTimeoutUSec", bus_property_append_usec, "t", offsetof(Unit, job_timeout) }, |
| { "ConditionTimestamp", bus_property_append_usec, "t", offsetof(Unit, condition_timestamp.realtime) }, |
| { "ConditionTimestampMonotonic", bus_property_append_usec, "t", offsetof(Unit, condition_timestamp.monotonic) }, |
| { "ConditionResult", bus_property_append_bool, "b", offsetof(Unit, condition_result) }, |
| { "Conditions", bus_property_append_condition_list, "a(sbbsi)", offsetof(Unit, conditions) }, |
| { "LoadError", bus_unit_append_load_error, "(ss)", 0 }, |
| { "Transient", bus_property_append_bool, "b", offsetof(Unit, transient) }, |
| {} |
| }; |
| |
| const BusProperty bus_unit_cgroup_properties[] = { |
| { "Slice", bus_unit_append_slice, "s", 0 }, |
| { "ControlGroup", bus_property_append_string, "s", offsetof(Unit, cgroup_path), true }, |
| {} |
| }; |