/*-*- 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 "log.h" #include "sd-bus.h" #include "selinux-access.h" #include "job.h" #include "dbus-job.h" #include "dbus.h" static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, job_type, JobType); static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_state, job_state, JobState); static int verify_sys_admin_or_owner_sync(sd_bus_message *message, Job *j, sd_bus_error *error) { int r; if (sd_bus_track_contains(j->clients, sd_bus_message_get_sender(message))) return 0; /* One of the job owners is calling us */ r = sd_bus_query_sender_privilege(message, CAP_SYS_ADMIN); if (r < 0) return r; if (r == 0) return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Access denied to perform action"); /* Root has called us */ return 0; } static int property_get_unit( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { _cleanup_free_ char *p = NULL; Job *j = userdata; assert(bus); assert(reply); assert(j); p = unit_dbus_path(j->unit); if (!p) return -ENOMEM; return sd_bus_message_append(reply, "(so)", j->unit->id, p); } int bus_job_method_cancel(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { Job *j = userdata; int r; assert(bus); assert(message); assert(j); r = verify_sys_admin_or_owner_sync(message, j, error); if (r < 0) return r; r = selinux_unit_access_check(j->unit, message, "stop", error); if (r < 0) return r; job_finish_and_invalidate(j, JOB_CANCELED, true); return sd_bus_reply_method_return(message, NULL); } const sd_bus_vtable bus_job_vtable[] = { SD_BUS_VTABLE_START(0), SD_BUS_METHOD("Cancel", NULL, NULL, bus_job_method_cancel, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_PROPERTY("Id", "u", NULL, offsetof(Job, id), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("Unit", "(so)", property_get_unit, 0, SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("JobType", "s", property_get_type, offsetof(Job, type), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("State", "s", property_get_state, offsetof(Job, state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_VTABLE_END }; static int send_new_signal(sd_bus *bus, void *userdata) { _cleanup_bus_message_unref_ sd_bus_message *m = NULL; _cleanup_free_ char *p = NULL; Job *j = userdata; int r; assert(bus); assert(j); p = job_dbus_path(j); if (!p) return -ENOMEM; r = sd_bus_message_new_signal( bus, &m, "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "JobNew"); if (r < 0) return r; r = sd_bus_message_append(m, "uos", j->id, p, j->unit->id); if (r < 0) return r; return sd_bus_send(bus, m, NULL); } static int send_changed_signal(sd_bus *bus, void *userdata) { _cleanup_free_ char *p = NULL; Job *j = userdata; assert(bus); assert(j); p = job_dbus_path(j); if (!p) return -ENOMEM; return sd_bus_emit_properties_changed(bus, p, "org.freedesktop.systemd1.Job", "State", NULL); } void bus_job_send_change_signal(Job *j) { int r; assert(j); if (j->in_dbus_queue) { LIST_REMOVE(dbus_queue, j->manager->dbus_job_queue, j); j->in_dbus_queue = false; } r = bus_foreach_bus(j->manager, j->clients, j->sent_dbus_new_signal ? send_changed_signal : send_new_signal, j); if (r < 0) log_debug("Failed to send job change signal for %u: %s", j->id, strerror(-r)); j->sent_dbus_new_signal = true; } static int send_removed_signal(sd_bus *bus, void *userdata) { _cleanup_bus_message_unref_ sd_bus_message *m = NULL; _cleanup_free_ char *p = NULL; Job *j = userdata; int r; assert(bus); assert(j); p = job_dbus_path(j); if (!p) return -ENOMEM; r = sd_bus_message_new_signal( bus, &m, "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "JobRemoved"); if (r < 0) return r; r = sd_bus_message_append(m, "uoss", j->id, p, j->unit->id, job_result_to_string(j->result)); if (r < 0) return r; return sd_bus_send(bus, m, NULL); } void bus_job_send_removed_signal(Job *j) { int r; assert(j); if (!j->sent_dbus_new_signal) bus_job_send_change_signal(j); r = bus_foreach_bus(j->manager, j->clients, send_removed_signal, j); if (r < 0) log_debug("Failed to send job remove signal for %u: %s", j->id, strerror(-r)); }