src/core/dbus-manager.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <unistd.h>
  24
  25 #include "dbus.h"
  26 #include "log.h"
  27 #include "dbus-manager.h"
  28 #include "strv.h"
  29 #include "bus-errors.h"
  30 #include "build.h"
  31 #include "dbus-common.h"
  32 #include "install.h"
  33
  34 #define BUS_MANAGER_INTERFACE_BEGIN                                     \
  35         " <interface name=\"org.freedesktop.systemd1.Manager\">\n"
  36
  37 #define BUS_MANAGER_INTERFACE_METHODS                                   \
  38         "  <method name=\"GetUnit\">\n"                                 \
  39         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  40         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  41         "  </method>\n"                                                 \
  42         "  <method name=\"GetUnitByPID\">\n"                            \
  43         "   <arg name=\"pid\" type=\"u\" direction=\"in\"/>\n"          \
  44         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  45         "  </method>\n"                                                 \
  46         "  <method name=\"LoadUnit\">\n"                                \
  47         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  48         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  49         "  </method>\n"                                                 \
  50         "  <method name=\"StartUnit\">\n"                               \
  51         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  52         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  53         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  54         "  </method>\n"                                                 \
  55         "  <method name=\"StartUnitReplace\">\n"                        \
  56         "   <arg name=\"old_unit\" type=\"s\" direction=\"in\"/>\n"     \
  57         "   <arg name=\"new_unit\" type=\"s\" direction=\"in\"/>\n"     \
  58         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  59         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  60         "  </method>\n"                                                 \
  61         "  <method name=\"StopUnit\">\n"                                \
  62         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  63         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  64         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  65         "  </method>\n"                                                 \
  66         "  <method name=\"ReloadUnit\">\n"                              \
  67         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  68         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  69         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  70         "  </method>\n"                                                 \
  71         "  <method name=\"RestartUnit\">\n"                             \
  72         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  73         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  74         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  75         "  </method>\n"                                                 \
  76         "  <method name=\"TryRestartUnit\">\n"                          \
  77         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  78         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  79         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  80         "  </method>\n"                                                 \
  81         "  <method name=\"ReloadOrRestartUnit\">\n"                     \
  82         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  83         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  84         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  85         "  </method>\n"                                                 \
  86         "  <method name=\"ReloadOrTryRestartUnit\">\n"                  \
  87         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  88         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  89         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  90         "  </method>\n"                                                 \
  91         "  <method name=\"KillUnit\">\n"                                \
  92         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  93         "   <arg name=\"who\" type=\"s\" direction=\"in\"/>\n"          \
  94         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  95         "   <arg name=\"signal\" type=\"i\" direction=\"in\"/>\n"       \
  96         "  </method>\n"                                                 \
  97         "  <method name=\"ResetFailedUnit\">\n"                         \
  98         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  99         "  </method>\n"                                                 \
 100         "  <method name=\"GetJob\">\n"                                  \
 101         "   <arg name=\"id\" type=\"u\" direction=\"in\"/>\n"           \
 102         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
 103         "  </method>\n"                                                 \
 104         "  <method name=\"ClearJobs\"/>\n"                              \
 105         "  <method name=\"ResetFailed\"/>\n"                            \
 106         "  <method name=\"ListUnits\">\n"                               \
 107         "   <arg name=\"units\" type=\"a(ssssssouso)\" direction=\"out\"/>\n" \
 108         "  </method>\n"                                                 \
 109         "  <method name=\"ListJobs\">\n"                                \
 110         "   <arg name=\"jobs\" type=\"a(usssoo)\" direction=\"out\"/>\n" \
 111         "  </method>\n"                                                 \
 112         "  <method name=\"Subscribe\"/>\n"                              \
 113         "  <method name=\"Unsubscribe\"/>\n"                            \
 114         "  <method name=\"Dump\"/>\n"                                   \
 115         "  <method name=\"CreateSnapshot\">\n"                          \
 116         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
 117         "   <arg name=\"cleanup\" type=\"b\" direction=\"in\"/>\n"      \
 118         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
 119         "  </method>\n"                                                 \
 120         "  <method name=\"Reload\"/>\n"                                 \
 121         "  <method name=\"Reexecute\"/>\n"                              \
 122         "  <method name=\"Exit\"/>\n"                                   \
 123         "  <method name=\"Reboot\"/>\n"                                 \
 124         "  <method name=\"PowerOff\"/>\n"                               \
 125         "  <method name=\"Halt\"/>\n"                                   \
 126         "  <method name=\"KExec\"/>\n"                                  \
 127         "  <method name=\"SetEnvironment\">\n"                          \
 128         "   <arg name=\"names\" type=\"as\" direction=\"in\"/>\n"       \
 129         "  </method>\n"                                                 \
 130         "  <method name=\"UnsetEnvironment\">\n"                        \
 131         "   <arg name=\"names\" type=\"as\" direction=\"in\"/>\n"       \
 132         "  </method>\n"                                                 \
 133         "  <method name=\"UnsetAndSetEnvironment\">\n"                  \
 134         "   <arg name=\"unset\" type=\"as\" direction=\"in\"/>\n"       \
 135         "   <arg name=\"set\" type=\"as\" direction=\"in\"/>\n"         \
 136         "  </method>\n"                                                 \
 137         "  <method name=\"ListUnitFiles\">\n"                            \
 138         "   <arg name=\"changes\" type=\"a(ss)\" direction=\"out\"/>\n" \
 139         "  </method>\n"                                                 \
 140         "  <method name=\"GetUnitFileState\">\n"                        \
 141         "   <arg name=\"file\" type=\"s\" direction=\"in\"/>\n"         \
 142         "   <arg name=\"state\" type=\"s\" direction=\"out\"/>\n"       \
 143         "  </method>\n"                                                 \
 144         "  <method name=\"EnableUnitFiles\">\n"                         \
 145         "   <arg name=\"files\" type=\"as\" direction=\"in\"/>\n"       \
 146         "   <arg name=\"runtime\" type=\"b\" direction=\"in\"/>\n"      \
 147         "   <arg name=\"force\" type=\"b\" direction=\"in\"/>\n"        \
 148         "   <arg name=\"carries_install_info\" type=\"b\" direction=\"out\"/>\n" \
 149         "   <arg name=\"changes\" type=\"a(sss)\" direction=\"out\"/>\n" \
 150         "  </method>\n"                                                 \
 151         "  <method name=\"DisableUnitFiles\">\n"                        \
 152         "   <arg name=\"files\" type=\"as\" direction=\"in\"/>\n"       \
 153         "   <arg name=\"runtime\" type=\"b\" direction=\"in\"/>\n"      \
 154         "   <arg name=\"changes\" type=\"a(sss)\" direction=\"out\"/>\n" \
 155         "  </method>\n"                                                 \
 156         "  <method name=\"ReenableUnitFiles\">\n"                       \
 157         "   <arg name=\"files\" type=\"as\" direction=\"in\"/>\n"       \
 158         "   <arg name=\"runtime\" type=\"b\" direction=\"in\"/>\n"      \
 159         "   <arg name=\"force\" type=\"b\" direction=\"in\"/>\n"        \
 160         "   <arg name=\"carries_install_info\" type=\"b\" direction=\"out\"/>\n" \
 161         "   <arg name=\"changes\" type=\"a(sss)\" direction=\"out\"/>\n" \
 162         "  </method>\n"                                                 \
 163         "  <method name=\"LinkUnitFiles\">\n"                           \
 164         "   <arg name=\"files\" type=\"as\" direction=\"in\"/>\n"       \
 165         "   <arg name=\"runtime\" type=\"b\" direction=\"in\"/>\n"      \
 166         "   <arg name=\"force\" type=\"b\" direction=\"in\"/>\n"        \
 167         "   <arg name=\"changes\" type=\"a(sss)\" direction=\"out\"/>\n" \
 168         "  </method>\n"                                                 \
 169         "  <method name=\"PresetUnitFiles\">\n"                         \
 170         "   <arg name=\"files\" type=\"as\" direction=\"in\"/>\n"       \
 171         "   <arg name=\"runtime\" type=\"b\" direction=\"in\"/>\n"      \
 172         "   <arg name=\"force\" type=\"b\" direction=\"in\"/>\n"        \
 173         "   <arg name=\"carries_install_info\" type=\"b\" direction=\"out\"/>\n" \
 174         "   <arg name=\"changes\" type=\"a(sss)\" direction=\"out\"/>\n" \
 175         "  </method>\n"                                                 \
 176         "  <method name=\"MaskUnitFiles\">\n"                           \
 177         "   <arg name=\"files\" type=\"as\" direction=\"in\"/>\n"       \
 178         "   <arg name=\"runtime\" type=\"b\" direction=\"in\"/>\n"      \
 179         "   <arg name=\"force\" type=\"b\" direction=\"in\"/>\n"        \
 180         "   <arg name=\"changes\" type=\"a(sss)\" direction=\"out\"/>\n" \
 181         "  </method>\n"                                                 \
 182         "  <method name=\"UnmaskUnitFiles\">\n"                         \
 183         "   <arg name=\"files\" type=\"as\" direction=\"in\"/>\n"       \
 184         "   <arg name=\"runtime\" type=\"b\" direction=\"in\"/>\n"      \
 185         "   <arg name=\"changes\" type=\"a(sss)\" direction=\"out\"/>\n" \
 186         "  </method>\n"
 187
 188 #define BUS_MANAGER_INTERFACE_SIGNALS                                   \
 189         "  <signal name=\"UnitNew\">\n"                                 \
 190         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 191         "   <arg name=\"unit\" type=\"o\"/>\n"                          \
 192         "  </signal>\n"                                                 \
 193         "  <signal name=\"UnitRemoved\">\n"                             \
 194         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 195         "   <arg name=\"unit\" type=\"o\"/>\n"                          \
 196         "  </signal>\n"                                                 \
 197         "  <signal name=\"JobNew\">\n"                                  \
 198         "   <arg name=\"id\" type=\"u\"/>\n"                            \
 199         "   <arg name=\"job\" type=\"o\"/>\n"                           \
 200         "  </signal>\n"                                                 \
 201         "  <signal name=\"JobRemoved\">\n"                              \
 202         "   <arg name=\"id\" type=\"u\"/>\n"                            \
 203         "   <arg name=\"job\" type=\"o\"/>\n"                           \
 204         "   <arg name=\"result\" type=\"s\"/>\n"                        \
 205         "  </signal>"                                                   \
 206         "  <signal name=\"StartupFinished\">\n"                         \
 207         "   <arg name=\"kernel\" type=\"t\"/>\n"                        \
 208         "   <arg name=\"initrd\" type=\"t\"/>\n"                        \
 209         "   <arg name=\"userspace\" type=\"t\"/>\n"                     \
 210         "   <arg name=\"total\" type=\"t\"/>\n"                         \
 211         "  </signal>"                                                   \
 212         "  <signal name=\"UnitFilesChanged\"/>\n"
 213
 214 #define BUS_MANAGER_INTERFACE_PROPERTIES_GENERAL                        \
 215         "  <property name=\"Version\" type=\"s\" access=\"read\"/>\n"   \
 216         "  <property name=\"Distribution\" type=\"s\" access=\"read\"/>\n" \
 217         "  <property name=\"Features\" type=\"s\" access=\"read\"/>\n"  \
 218         "  <property name=\"Tainted\" type=\"s\" access=\"read\"/>\n"   \
 219         "  <property name=\"RunningAs\" type=\"s\" access=\"read\"/>\n" \
 220         "  <property name=\"InitRDTimestamp\" type=\"t\" access=\"read\"/>\n" \
 221         "  <property name=\"InitRDTimestampMonotonic\" type=\"t\" access=\"read\"/>\n" \
 222         "  <property name=\"StartupTimestamp\" type=\"t\" access=\"read\"/>\n" \
 223         "  <property name=\"StartupTimestampMonotonic\" type=\"t\" access=\"read\"/>\n" \
 224         "  <property name=\"FinishTimestamp\" type=\"t\" access=\"read\"/>\n" \
 225         "  <property name=\"FinishTimestampMonotonic\" type=\"t\" access=\"read\"/>\n" \
 226         "  <property name=\"LogLevel\" type=\"s\" access=\"readwrite\"/>\n"  \
 227         "  <property name=\"LogTarget\" type=\"s\" access=\"readwrite\"/>\n" \
 228         "  <property name=\"NNames\" type=\"u\" access=\"read\"/>\n"    \
 229         "  <property name=\"NJobs\" type=\"u\" access=\"read\"/>\n"     \
 230         "  <property name=\"NInstalledJobs\" type=\"u\" access=\"read\"/>\n" \
 231         "  <property name=\"NFailedJobs\" type=\"u\" access=\"read\"/>\n" \
 232         "  <property name=\"Progress\" type=\"d\" access=\"read\"/>\n"  \
 233         "  <property name=\"Environment\" type=\"as\" access=\"read\"/>\n" \
 234         "  <property name=\"ConfirmSpawn\" type=\"b\" access=\"read\"/>\n" \
 235         "  <property name=\"ShowStatus\" type=\"b\" access=\"read\"/>\n" \
 236         "  <property name=\"UnitPath\" type=\"as\" access=\"read\"/>\n" \
 237         "  <property name=\"NotifySocket\" type=\"s\" access=\"read\"/>\n" \
 238         "  <property name=\"ControlGroupHierarchy\" type=\"s\" access=\"read\"/>\n" \
 239         "  <property name=\"MountAuto\" type=\"b\" access=\"read\"/>\n" \
 240         "  <property name=\"SwapAuto\" type=\"b\" access=\"read\"/>\n"  \
 241         "  <property name=\"DefaultControllers\" type=\"as\" access=\"read\"/>\n" \
 242         "  <property name=\"DefaultStandardOutput\" type=\"s\" access=\"read\"/>\n" \
 243         "  <property name=\"DefaultStandardError\" type=\"s\" access=\"read\"/>\n" \
 244         "  <property name=\"RuntimeWatchdogUSec\" type=\"s\" access=\"read\"/>\n" \
 245         "  <property name=\"ShutdownWatchdogUSec\" type=\"s\" access=\"read\"/>\n"
 246
 247 #ifdef HAVE_SYSV_COMPAT
 248 #define BUS_MANAGER_INTERFACE_PROPERTIES_SYSV                           \
 249         "  <property name=\"SysVConsole\" type=\"b\" access=\"read\"/>\n" \
 250         "  <property name=\"SysVInitPath\" type=\"as\" access=\"read\"/>\n" \
 251         "  <property name=\"SysVRcndPath\" type=\"as\" access=\"read\"/>\n"
 252 #else
 253 #define BUS_MANAGER_INTERFACE_PROPERTIES_SYSV
 254 #endif
 255
 256 #define BUS_MANAGER_INTERFACE_END                                       \
 257         " </interface>\n"
 258
 259 #define BUS_MANAGER_INTERFACE                                           \
 260         BUS_MANAGER_INTERFACE_BEGIN                                     \
 261         BUS_MANAGER_INTERFACE_METHODS                                   \
 262         BUS_MANAGER_INTERFACE_SIGNALS                                   \
 263         BUS_MANAGER_INTERFACE_PROPERTIES_GENERAL                        \
 264         BUS_MANAGER_INTERFACE_PROPERTIES_SYSV                           \
 265         BUS_MANAGER_INTERFACE_END
 266
 267 #define INTROSPECTION_BEGIN                                             \
 268         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
 269         "<node>\n"                                                      \
 270         BUS_MANAGER_INTERFACE                                           \
 271         BUS_PROPERTIES_INTERFACE                                        \
 272         BUS_PEER_INTERFACE                                              \
 273         BUS_INTROSPECTABLE_INTERFACE
 274
 275 #define INTROSPECTION_END                                               \
 276         "</node>\n"
 277
 278 #define INTERFACES_LIST                              \
 279         BUS_GENERIC_INTERFACES_LIST                  \
 280         "org.freedesktop.systemd1.Manager\0"
 281
 282 const char bus_manager_interface[] _introspect_("Manager") = BUS_MANAGER_INTERFACE;
 283
 284 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_manager_append_running_as, manager_running_as, ManagerRunningAs);
 285 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_manager_append_exec_output, exec_output, ExecOutput);
 286
 287 static int bus_manager_append_tainted(DBusMessageIter *i, const char *property, void *data) {
 288         const char *t;
 289         Manager *m = data;
 290         char buf[LINE_MAX] = "", *e = buf, *p = NULL;
 291
 292         assert(i);
 293         assert(property);
 294         assert(m);
 295
 296         if (m->taint_usr)
 297                 e = stpcpy(e, "usr-separate-fs ");
 298
 299         if (readlink_malloc("/etc/mtab", &p) < 0)
 300                 e = stpcpy(e, "etc-mtab-not-symlink ");
 301         else
 302                 free(p);
 303
 304         if (access("/proc/cgroups", F_OK) < 0)
 305                 stpcpy(e, "cgroups-missing ");
 306
 307         t = strstrip(buf);
 308
 309         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 310                 return -ENOMEM;
 311
 312         return 0;
 313 }
 314
 315 static int bus_manager_append_log_target(DBusMessageIter *i, const char *property, void *data) {
 316         const char *t;
 317
 318         assert(i);
 319         assert(property);
 320
 321         t = log_target_to_string(log_get_target());
 322
 323         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 324                 return -ENOMEM;
 325
 326         return 0;
 327 }
 328
 329 static int bus_manager_set_log_target(DBusMessageIter *i, const char *property, void *data) {
 330         const char *t;
 331
 332         assert(i);
 333         assert(property);
 334
 335         dbus_message_iter_get_basic(i, &t);
 336
 337         return log_set_target_from_string(t);
 338 }
 339
 340 static int bus_manager_append_log_level(DBusMessageIter *i, const char *property, void *data) {
 341         const char *t;
 342
 343         assert(i);
 344         assert(property);
 345
 346         t = log_level_to_string(log_get_max_level());
 347
 348         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 349                 return -ENOMEM;
 350
 351         return 0;
 352 }
 353
 354 static int bus_manager_set_log_level(DBusMessageIter *i, const char *property, void *data) {
 355         const char *t;
 356
 357         assert(i);
 358         assert(property);
 359
 360         dbus_message_iter_get_basic(i, &t);
 361
 362         return log_set_max_level_from_string(t);
 363 }
 364
 365 static int bus_manager_append_n_names(DBusMessageIter *i, const char *property, void *data) {
 366         Manager *m = data;
 367         uint32_t u;
 368
 369         assert(i);
 370         assert(property);
 371         assert(m);
 372
 373         u = hashmap_size(m->units);
 374
 375         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 376                 return -ENOMEM;
 377
 378         return 0;
 379 }
 380
 381 static int bus_manager_append_n_jobs(DBusMessageIter *i, const char *property, void *data) {
 382         Manager *m = data;
 383         uint32_t u;
 384
 385         assert(i);
 386         assert(property);
 387         assert(m);
 388
 389         u = hashmap_size(m->jobs);
 390
 391         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 392                 return -ENOMEM;
 393
 394         return 0;
 395 }
 396
 397 static int bus_manager_append_progress(DBusMessageIter *i, const char *property, void *data) {
 398         double d;
 399         Manager *m = data;
 400
 401         assert(i);
 402         assert(property);
 403         assert(m);
 404
 405         if (dual_timestamp_is_set(&m->finish_timestamp))
 406                 d = 1.0;
 407         else
 408                 d = 1.0 - ((double) hashmap_size(m->jobs) / (double) m->n_installed_jobs);
 409
 410         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_DOUBLE, &d))
 411                 return -ENOMEM;
 412
 413         return 0;
 414 }
 415
 416 static const char *message_get_sender_with_fallback(DBusMessage *m) {
 417         const char *s;
 418
 419         assert(m);
 420
 421         if ((s = dbus_message_get_sender(m)))
 422                 return s;
 423
 424         /* When the message came in from a direct connection the
 425          * message will have no sender. We fix that here. */
 426
 427         return ":no-sender";
 428 }
 429
 430 static DBusMessage *message_from_file_changes(
 431                 DBusMessage *m,
 432                 UnitFileChange *changes,
 433                 unsigned n_changes,
 434                 int carries_install_info) {
 435
 436         DBusMessageIter iter, sub, sub2;
 437         DBusMessage *reply;
 438         unsigned i;
 439
 440         reply = dbus_message_new_method_return(m);
 441         if (!reply)
 442                 return NULL;
 443
 444         dbus_message_iter_init_append(reply, &iter);
 445
 446         if (carries_install_info >= 0) {
 447                 dbus_bool_t b;
 448
 449                 b = !!carries_install_info;
 450                 if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &b))
 451                         goto oom;
 452         }
 453
 454         if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(sss)", &sub))
 455                 goto oom;
 456
 457         for (i = 0; i < n_changes; i++) {
 458                 const char *type, *path, *source;
 459
 460                 type = unit_file_change_type_to_string(changes[i].type);
 461                 path = strempty(changes[i].path);
 462                 source = strempty(changes[i].source);
 463
 464                 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) ||
 465                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &type) ||
 466                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &path) ||
 467                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &source) ||
 468                     !dbus_message_iter_close_container(&sub, &sub2))
 469                         goto oom;
 470         }
 471
 472         if (!dbus_message_iter_close_container(&iter, &sub))
 473                 goto oom;
 474
 475         return reply;
 476
 477 oom:
 478         dbus_message_unref(reply);
 479         return NULL;
 480 }
 481
 482 static int bus_manager_send_unit_files_changed(Manager *m) {
 483         DBusMessage *s;
 484         int r;
 485
 486         s = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitFilesChanged");
 487         if (!s)
 488                 return -ENOMEM;
 489
 490         r = bus_broadcast(m, s);
 491         dbus_message_unref(s);
 492
 493         return r;
 494 }
 495
 496 static const char systemd_property_string[] =
 497         PACKAGE_STRING "\0"
 498         DISTRIBUTION "\0"
 499         SYSTEMD_FEATURES;
 500
 501 static const BusProperty bus_systemd_properties[] = {
 502         { "Version",       bus_property_append_string,    "s",  0                                             },
 503         { "Distribution",  bus_property_append_string,    "s",  sizeof(PACKAGE_STRING)                        },
 504         { "Features",      bus_property_append_string,    "s",  sizeof(PACKAGE_STRING) + sizeof(DISTRIBUTION) },
 505         { NULL, }
 506 };
 507
 508 static const BusProperty bus_manager_properties[] = {
 509         { "RunningAs",     bus_manager_append_running_as,          "s", offsetof(Manager, running_as)                  },
 510         { "Tainted",       bus_manager_append_tainted,             "s", 0                                              },
 511         { "InitRDTimestamp", bus_property_append_uint64,           "t", offsetof(Manager, initrd_timestamp.realtime)   },
 512         { "InitRDTimestampMonotonic", bus_property_append_uint64,  "t", offsetof(Manager, initrd_timestamp.monotonic)  },
 513         { "StartupTimestamp", bus_property_append_uint64,          "t", offsetof(Manager, startup_timestamp.realtime)  },
 514         { "StartupTimestampMonotonic", bus_property_append_uint64, "t", offsetof(Manager, startup_timestamp.monotonic) },
 515         { "FinishTimestamp", bus_property_append_uint64,           "t", offsetof(Manager, finish_timestamp.realtime)   },
 516         { "FinishTimestampMonotonic", bus_property_append_uint64,  "t", offsetof(Manager, finish_timestamp.monotonic)  },
 517         { "LogLevel",      bus_manager_append_log_level,           "s", 0,                                             0, bus_manager_set_log_level },
 518         { "LogTarget",     bus_manager_append_log_target,          "s", 0,                                             0, bus_manager_set_log_target },
 519         { "NNames",        bus_manager_append_n_names,             "u", 0                                              },
 520         { "NJobs",         bus_manager_append_n_jobs,              "u", 0                                              },
 521         { "NInstalledJobs",bus_property_append_uint32,             "u", offsetof(Manager, n_installed_jobs)            },
 522         { "NFailedJobs",   bus_property_append_uint32,             "u", offsetof(Manager, n_failed_jobs)               },
 523         { "Progress",      bus_manager_append_progress,            "d", 0                                              },
 524         { "Environment",   bus_property_append_strv,              "as", offsetof(Manager, environment),                true },
 525         { "ConfirmSpawn",  bus_property_append_bool,               "b", offsetof(Manager, confirm_spawn)               },
 526         { "ShowStatus",    bus_property_append_bool,               "b", offsetof(Manager, show_status)                 },
 527         { "UnitPath",      bus_property_append_strv,              "as", offsetof(Manager, lookup_paths.unit_path),     true },
 528         { "NotifySocket",  bus_property_append_string,             "s", offsetof(Manager, notify_socket),              true },
 529         { "ControlGroupHierarchy", bus_property_append_string,     "s", offsetof(Manager, cgroup_hierarchy),           true },
 530         { "MountAuto",     bus_property_append_bool,               "b", offsetof(Manager, mount_auto)                  },
 531         { "SwapAuto",      bus_property_append_bool,               "b", offsetof(Manager, swap_auto)                   },
 532         { "DefaultControllers", bus_property_append_strv,         "as", offsetof(Manager, default_controllers),        true },
 533         { "DefaultStandardOutput", bus_manager_append_exec_output, "s", offsetof(Manager, default_std_output)          },
 534         { "DefaultStandardError",  bus_manager_append_exec_output, "s", offsetof(Manager, default_std_error)           },
 535         { "RuntimeWatchdogUSec", bus_property_append_usec,         "t", offsetof(Manager, runtime_watchdog),           },
 536         { "ShutdownWatchdogUSec", bus_property_append_usec,        "t", offsetof(Manager, shutdown_watchdog),          },
 537 #ifdef HAVE_SYSV_COMPAT
 538         { "SysVConsole",   bus_property_append_bool,               "b", offsetof(Manager, sysv_console)                },
 539         { "SysVInitPath",  bus_property_append_strv,              "as", offsetof(Manager, lookup_paths.sysvinit_path), true },
 540         { "SysVRcndPath",  bus_property_append_strv,              "as", offsetof(Manager, lookup_paths.sysvrcnd_path), true },
 541 #endif
 542         { NULL, }
 543 };
 544
 545 static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
 546         Manager *m = data;
 547
 548         int r;
 549         DBusError error;
 550         DBusMessage *reply = NULL;
 551         char * path = NULL;
 552         JobType job_type = _JOB_TYPE_INVALID;
 553         bool reload_if_possible = false;
 554         const char *member;
 555
 556         assert(connection);
 557         assert(message);
 558         assert(m);
 559
 560         dbus_error_init(&error);
 561
 562         member = dbus_message_get_member(message);
 563
 564         if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnit")) {
 565                 const char *name;
 566                 Unit *u;
 567
 568                 if (!dbus_message_get_args(
 569                                     message,
 570                                     &error,
 571                                     DBUS_TYPE_STRING, &name,
 572                                     DBUS_TYPE_INVALID))
 573                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 574
 575                 if (!(u = manager_get_unit(m, name))) {
 576                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 577                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 578                 }
 579
 580                 if (!(reply = dbus_message_new_method_return(message)))
 581                         goto oom;
 582
 583                 if (!(path = unit_dbus_path(u)))
 584                         goto oom;
 585
 586                 if (!dbus_message_append_args(
 587                                     reply,
 588                                     DBUS_TYPE_OBJECT_PATH, &path,
 589                                     DBUS_TYPE_INVALID))
 590                         goto oom;
 591         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnitByPID")) {
 592                 Unit *u;
 593                 uint32_t pid;
 594
 595                 if (!dbus_message_get_args(
 596                                     message,
 597                                     &error,
 598                                     DBUS_TYPE_UINT32, &pid,
 599                                     DBUS_TYPE_INVALID))
 600                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 601
 602                 if (!(u = cgroup_unit_by_pid(m, (pid_t) pid))) {
 603                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "No unit for PID %lu is loaded.", (unsigned long) pid);
 604                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 605                 }
 606
 607                 if (!(reply = dbus_message_new_method_return(message)))
 608                         goto oom;
 609
 610                 if (!(path = unit_dbus_path(u)))
 611                         goto oom;
 612
 613                 if (!dbus_message_append_args(
 614                                     reply,
 615                                     DBUS_TYPE_OBJECT_PATH, &path,
 616                                     DBUS_TYPE_INVALID))
 617                         goto oom;
 618         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "LoadUnit")) {
 619                 const char *name;
 620                 Unit *u;
 621
 622                 if (!dbus_message_get_args(
 623                                     message,
 624                                     &error,
 625                                     DBUS_TYPE_STRING, &name,
 626                                     DBUS_TYPE_INVALID))
 627                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 628
 629                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 630                         return bus_send_error_reply(connection, message, &error, r);
 631
 632                 if (!(reply = dbus_message_new_method_return(message)))
 633                         goto oom;
 634
 635                 if (!(path = unit_dbus_path(u)))
 636                         goto oom;
 637
 638                 if (!dbus_message_append_args(
 639                                     reply,
 640                                     DBUS_TYPE_OBJECT_PATH, &path,
 641                                     DBUS_TYPE_INVALID))
 642                         goto oom;
 643
 644         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StartUnit"))
 645                 job_type = JOB_START;
 646         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StartUnitReplace"))
 647                 job_type = JOB_START;
 648         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StopUnit"))
 649                 job_type = JOB_STOP;
 650         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadUnit"))
 651                 job_type = JOB_RELOAD;
 652         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "RestartUnit"))
 653                 job_type = JOB_RESTART;
 654         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "TryRestartUnit"))
 655                 job_type = JOB_TRY_RESTART;
 656         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrRestartUnit")) {
 657                 reload_if_possible = true;
 658                 job_type = JOB_RESTART;
 659         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrTryRestartUnit")) {
 660                 reload_if_possible = true;
 661                 job_type = JOB_TRY_RESTART;
 662         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "KillUnit")) {
 663                 const char *name, *swho, *smode;
 664                 int32_t signo;
 665                 Unit *u;
 666                 KillMode mode;
 667                 KillWho who;
 668
 669                 if (!dbus_message_get_args(
 670                                     message,
 671                                     &error,
 672                                     DBUS_TYPE_STRING, &name,
 673                                     DBUS_TYPE_STRING, &swho,
 674                                     DBUS_TYPE_STRING, &smode,
 675                                     DBUS_TYPE_INT32, &signo,
 676                                     DBUS_TYPE_INVALID))
 677                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 678
 679                 if (isempty(swho))
 680                         who = KILL_ALL;
 681                 else {
 682                         who = kill_who_from_string(swho);
 683                         if (who < 0)
 684                                 return bus_send_error_reply(connection, message, &error, -EINVAL);
 685                 }
 686
 687                 if (isempty(smode))
 688                         mode = KILL_CONTROL_GROUP;
 689                 else {
 690                         mode = kill_mode_from_string(smode);
 691                         if (mode < 0)
 692                                 return bus_send_error_reply(connection, message, &error, -EINVAL);
 693                 }
 694
 695                 if (signo <= 0 || signo >= _NSIG)
 696                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 697
 698                 if (!(u = manager_get_unit(m, name))) {
 699                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 700                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 701                 }
 702
 703                 if ((r = unit_kill(u, who, mode, signo, &error)) < 0)
 704                         return bus_send_error_reply(connection, message, &error, r);
 705
 706                 if (!(reply = dbus_message_new_method_return(message)))
 707                         goto oom;
 708
 709         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetJob")) {
 710                 uint32_t id;
 711                 Job *j;
 712
 713                 if (!dbus_message_get_args(
 714                                     message,
 715                                     &error,
 716                                     DBUS_TYPE_UINT32, &id,
 717                                     DBUS_TYPE_INVALID))
 718                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 719
 720                 if (!(j = manager_get_job(m, id))) {
 721                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_JOB, "Job %u does not exist.", (unsigned) id);
 722                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 723                 }
 724
 725                 if (!(reply = dbus_message_new_method_return(message)))
 726                         goto oom;
 727
 728                 if (!(path = job_dbus_path(j)))
 729                         goto oom;
 730
 731                 if (!dbus_message_append_args(
 732                                     reply,
 733                                     DBUS_TYPE_OBJECT_PATH, &path,
 734                                     DBUS_TYPE_INVALID))
 735                         goto oom;
 736
 737         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ClearJobs")) {
 738
 739                 manager_clear_jobs(m);
 740
 741                 if (!(reply = dbus_message_new_method_return(message)))
 742                         goto oom;
 743
 744         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetFailed")) {
 745
 746                 manager_reset_failed(m);
 747
 748                 if (!(reply = dbus_message_new_method_return(message)))
 749                         goto oom;
 750
 751         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetFailedUnit")) {
 752                 const char *name;
 753                 Unit *u;
 754
 755                 if (!dbus_message_get_args(
 756                                     message,
 757                                     &error,
 758                                     DBUS_TYPE_STRING, &name,
 759                                     DBUS_TYPE_INVALID))
 760                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 761
 762                 if (!(u = manager_get_unit(m, name))) {
 763                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 764                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 765                 }
 766
 767                 unit_reset_failed(u);
 768
 769                 if (!(reply = dbus_message_new_method_return(message)))
 770                         goto oom;
 771
 772         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListUnits")) {
 773                 DBusMessageIter iter, sub;
 774                 Iterator i;
 775                 Unit *u;
 776                 const char *k;
 777
 778                 if (!(reply = dbus_message_new_method_return(message)))
 779                         goto oom;
 780
 781                 dbus_message_iter_init_append(reply, &iter);
 782
 783                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(ssssssouso)", &sub))
 784                         goto oom;
 785
 786                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 787                         char *u_path, *j_path;
 788                         const char *description, *load_state, *active_state, *sub_state, *sjob_type, *following;
 789                         DBusMessageIter sub2;
 790                         uint32_t job_id;
 791                         Unit *f;
 792
 793                         if (k != u->id)
 794                                 continue;
 795
 796                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 797                                 goto oom;
 798
 799                         description = unit_description(u);
 800                         load_state = unit_load_state_to_string(u->load_state);
 801                         active_state = unit_active_state_to_string(unit_active_state(u));
 802                         sub_state = unit_sub_state_to_string(u);
 803
 804                         f = unit_following(u);
 805                         following = f ? f->id : "";
 806
 807                         if (!(u_path = unit_dbus_path(u)))
 808                                 goto oom;
 809
 810                         if (u->job) {
 811                                 job_id = (uint32_t) u->job->id;
 812
 813                                 if (!(j_path = job_dbus_path(u->job))) {
 814                                         free(u_path);
 815                                         goto oom;
 816                                 }
 817
 818                                 sjob_type = job_type_to_string(u->job->type);
 819                         } else {
 820                                 job_id = 0;
 821                                 j_path = u_path;
 822                                 sjob_type = "";
 823                         }
 824
 825                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &u->id) ||
 826                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &description) ||
 827                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &load_state) ||
 828                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &active_state) ||
 829                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sub_state) ||
 830                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &following) ||
 831                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path) ||
 832                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &job_id) ||
 833                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sjob_type) ||
 834                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path)) {
 835                                 free(u_path);
 836                                 if (u->job)
 837                                         free(j_path);
 838                                 goto oom;
 839                         }
 840
 841                         free(u_path);
 842                         if (u->job)
 843                                 free(j_path);
 844
 845                         if (!dbus_message_iter_close_container(&sub, &sub2))
 846                                 goto oom;
 847                 }
 848
 849                 if (!dbus_message_iter_close_container(&iter, &sub))
 850                         goto oom;
 851
 852         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListJobs")) {
 853                 DBusMessageIter iter, sub;
 854                 Iterator i;
 855                 Job *j;
 856
 857                 if (!(reply = dbus_message_new_method_return(message)))
 858                         goto oom;
 859
 860                 dbus_message_iter_init_append(reply, &iter);
 861
 862                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(usssoo)", &sub))
 863                         goto oom;
 864
 865                 HASHMAP_FOREACH(j, m->jobs, i) {
 866                         char *u_path, *j_path;
 867                         const char *state, *type;
 868                         uint32_t id;
 869                         DBusMessageIter sub2;
 870
 871                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 872                                 goto oom;
 873
 874                         id = (uint32_t) j->id;
 875                         state = job_state_to_string(j->state);
 876                         type = job_type_to_string(j->type);
 877
 878                         if (!(j_path = job_dbus_path(j)))
 879                                 goto oom;
 880
 881                         if (!(u_path = unit_dbus_path(j->unit))) {
 882                                 free(j_path);
 883                                 goto oom;
 884                         }
 885
 886                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &id) ||
 887                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &j->unit->id) ||
 888                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &type) ||
 889                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &state) ||
 890                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path) ||
 891                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path)) {
 892                                 free(j_path);
 893                                 free(u_path);
 894                                 goto oom;
 895                         }
 896
 897                         free(j_path);
 898                         free(u_path);
 899
 900                         if (!dbus_message_iter_close_container(&sub, &sub2))
 901                                 goto oom;
 902                 }
 903
 904                 if (!dbus_message_iter_close_container(&iter, &sub))
 905                         goto oom;
 906
 907         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Subscribe")) {
 908                 char *client;
 909                 Set *s;
 910
 911                 if (!(s = BUS_CONNECTION_SUBSCRIBED(m, connection))) {
 912                         if (!(s = set_new(string_hash_func, string_compare_func)))
 913                                 goto oom;
 914
 915                         if (!(dbus_connection_set_data(connection, m->subscribed_data_slot, s, NULL))) {
 916                                 set_free(s);
 917                                 goto oom;
 918                         }
 919                 }
 920
 921                 if (!(client = strdup(message_get_sender_with_fallback(message))))
 922                         goto oom;
 923
 924                 if ((r = set_put(s, client)) < 0) {
 925                         free(client);
 926                         return bus_send_error_reply(connection, message, NULL, r);
 927                 }
 928
 929                 if (!(reply = dbus_message_new_method_return(message)))
 930                         goto oom;
 931
 932         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Unsubscribe")) {
 933                 char *client;
 934
 935                 if (!(client = set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) message_get_sender_with_fallback(message)))) {
 936                         dbus_set_error(&error, BUS_ERROR_NOT_SUBSCRIBED, "Client is not subscribed.");
 937                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 938                 }
 939
 940                 free(client);
 941
 942                 if (!(reply = dbus_message_new_method_return(message)))
 943                         goto oom;
 944
 945         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Dump")) {
 946                 FILE *f;
 947                 char *dump = NULL;
 948                 size_t size;
 949
 950                 if (!(reply = dbus_message_new_method_return(message)))
 951                         goto oom;
 952
 953                 if (!(f = open_memstream(&dump, &size)))
 954                         goto oom;
 955
 956                 manager_dump_units(m, f, NULL);
 957                 manager_dump_jobs(m, f, NULL);
 958
 959                 if (ferror(f)) {
 960                         fclose(f);
 961                         free(dump);
 962                         goto oom;
 963                 }
 964
 965                 fclose(f);
 966
 967                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &dump, DBUS_TYPE_INVALID)) {
 968                         free(dump);
 969                         goto oom;
 970                 }
 971
 972                 free(dump);
 973         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "CreateSnapshot")) {
 974                 const char *name;
 975                 dbus_bool_t cleanup;
 976                 Snapshot *s;
 977
 978                 if (!dbus_message_get_args(
 979                                     message,
 980                                     &error,
 981                                     DBUS_TYPE_STRING, &name,
 982                                     DBUS_TYPE_BOOLEAN, &cleanup,
 983                                     DBUS_TYPE_INVALID))
 984                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 985
 986                 if (name && name[0] == 0)
 987                         name = NULL;
 988
 989                 if ((r = snapshot_create(m, name, cleanup, &error, &s)) < 0)
 990                         return bus_send_error_reply(connection, message, &error, r);
 991
 992                 if (!(reply = dbus_message_new_method_return(message)))
 993                         goto oom;
 994
 995                 if (!(path = unit_dbus_path(UNIT(s))))
 996                         goto oom;
 997
 998                 if (!dbus_message_append_args(
 999                                     reply,
1000                                     DBUS_TYPE_OBJECT_PATH, &path,
1001                                     DBUS_TYPE_INVALID))
1002                         goto oom;
1003
1004         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
1005                 char *introspection = NULL;
1006                 FILE *f;
1007                 Iterator i;
1008                 Unit *u;
1009                 Job *j;
1010                 const char *k;
1011                 size_t size;
1012
1013                 if (!(reply = dbus_message_new_method_return(message)))
1014                         goto oom;
1015
1016                 /* We roll our own introspection code here, instead of
1017                  * relying on bus_default_message_handler() because we
1018                  * need to generate our introspection string
1019                  * dynamically. */
1020
1021                 if (!(f = open_memstream(&introspection, &size)))
1022                         goto oom;
1023
1024                 fputs(INTROSPECTION_BEGIN, f);
1025
1026                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
1027                         char *p;
1028
1029                         if (k != u->id)
1030                                 continue;
1031
1032                         if (!(p = bus_path_escape(k))) {
1033                                 fclose(f);
1034                                 free(introspection);
1035                                 goto oom;
1036                         }
1037
1038                         fprintf(f, "<node name=\"unit/%s\"/>", p);
1039                         free(p);
1040                 }
1041
1042                 HASHMAP_FOREACH(j, m->jobs, i)
1043                         fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id);
1044
1045                 fputs(INTROSPECTION_END, f);
1046
1047                 if (ferror(f)) {
1048                         fclose(f);
1049                         free(introspection);
1050                         goto oom;
1051                 }
1052
1053                 fclose(f);
1054
1055                 if (!introspection)
1056                         goto oom;
1057
1058                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
1059                         free(introspection);
1060                         goto oom;
1061                 }
1062
1063                 free(introspection);
1064
1065         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reload")) {
1066
1067                 assert(!m->queued_message);
1068
1069                 /* Instead of sending the reply back right away, we
1070                  * just remember that we need to and then send it
1071                  * after the reload is finished. That way the caller
1072                  * knows when the reload finished. */
1073
1074                 if (!(m->queued_message = dbus_message_new_method_return(message)))
1075                         goto oom;
1076
1077                 m->queued_message_connection = connection;
1078                 m->exit_code = MANAGER_RELOAD;
1079
1080         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reexecute")) {
1081
1082                 /* We don't send a reply back here, the client should
1083                  * just wait for us disconnecting. */
1084
1085                 m->exit_code = MANAGER_REEXECUTE;
1086
1087         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Exit")) {
1088
1089                 if (m->running_as == MANAGER_SYSTEM) {
1090                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Exit is only supported for user service managers.");
1091                         return bus_send_error_reply(connection, message, &error, -ENOTSUP);
1092                 }
1093
1094                 if (!(reply = dbus_message_new_method_return(message)))
1095                         goto oom;
1096
1097                 m->exit_code = MANAGER_EXIT;
1098
1099         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reboot")) {
1100
1101                 if (m->running_as != MANAGER_SYSTEM) {
1102                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Reboot is only supported for system managers.");
1103                         return bus_send_error_reply(connection, message, &error, -ENOTSUP);
1104                 }
1105
1106                 if (!(reply = dbus_message_new_method_return(message)))
1107                         goto oom;
1108
1109                 m->exit_code = MANAGER_REBOOT;
1110
1111         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "PowerOff")) {
1112
1113                 if (m->running_as != MANAGER_SYSTEM) {
1114                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Powering off is only supported for system managers.");
1115                         return bus_send_error_reply(connection, message, &error, -ENOTSUP);
1116                 }
1117
1118                 if (!(reply = dbus_message_new_method_return(message)))
1119                         goto oom;
1120
1121                 m->exit_code = MANAGER_POWEROFF;
1122
1123         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Halt")) {
1124
1125                 if (m->running_as != MANAGER_SYSTEM) {
1126                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Halting is only supported for system managers.");
1127                         return bus_send_error_reply(connection, message, &error, -ENOTSUP);
1128                 }
1129
1130                 if (!(reply = dbus_message_new_method_return(message)))
1131                         goto oom;
1132
1133                 m->exit_code = MANAGER_HALT;
1134
1135         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "KExec")) {
1136
1137                 if (m->running_as != MANAGER_SYSTEM) {
1138                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "kexec is only supported for system managers.");
1139                         return bus_send_error_reply(connection, message, &error, -ENOTSUP);
1140                 }
1141
1142                 if (!(reply = dbus_message_new_method_return(message)))
1143                         goto oom;
1144
1145                 m->exit_code = MANAGER_KEXEC;
1146
1147         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "SetEnvironment")) {
1148                 char **l = NULL, **e = NULL;
1149
1150                 if ((r = bus_parse_strv(message, &l)) < 0) {
1151                         if (r == -ENOMEM)
1152                                 goto oom;
1153
1154                         return bus_send_error_reply(connection, message, NULL, r);
1155                 }
1156
1157                 e = strv_env_merge(2, m->environment, l);
1158                 strv_free(l);
1159
1160                 if (!e)
1161                         goto oom;
1162
1163                 if (!(reply = dbus_message_new_method_return(message))) {
1164                         strv_free(e);
1165                         goto oom;
1166                 }
1167
1168                 strv_free(m->environment);
1169                 m->environment = e;
1170
1171         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "UnsetEnvironment")) {
1172                 char **l = NULL, **e = NULL;
1173
1174                 if ((r = bus_parse_strv(message, &l)) < 0) {
1175                         if (r == -ENOMEM)
1176                                 goto oom;
1177
1178                         return bus_send_error_reply(connection, message, NULL, r);
1179                 }
1180
1181                 e = strv_env_delete(m->environment, 1, l);
1182                 strv_free(l);
1183
1184                 if (!e)
1185                         goto oom;
1186
1187                 if (!(reply = dbus_message_new_method_return(message))) {
1188                         strv_free(e);
1189                         goto oom;
1190                 }
1191
1192                 strv_free(m->environment);
1193                 m->environment = e;
1194
1195         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "UnsetAndSetEnvironment")) {
1196                 char **l_set = NULL, **l_unset = NULL, **e = NULL, **f = NULL;
1197                 DBusMessageIter iter;
1198
1199                 if (!dbus_message_iter_init(message, &iter))
1200                         goto oom;
1201
1202                 r = bus_parse_strv_iter(&iter, &l_unset);
1203                 if (r < 0) {
1204                         if (r == -ENOMEM)
1205                                 goto oom;
1206
1207                         return bus_send_error_reply(connection, message, NULL, r);
1208                 }
1209
1210                 if (!dbus_message_iter_next(&iter)) {
1211                         strv_free(l_unset);
1212                         return bus_send_error_reply(connection, message, NULL, -EINVAL);
1213                 }
1214
1215                 r = bus_parse_strv_iter(&iter, &l_set);
1216                 if (r < 0) {
1217                         strv_free(l_unset);
1218                         if (r == -ENOMEM)
1219                                 goto oom;
1220
1221                         return bus_send_error_reply(connection, message, NULL, r);
1222                 }
1223
1224                 e = strv_env_delete(m->environment, 1, l_unset);
1225                 strv_free(l_unset);
1226
1227                 if (!e) {
1228                         strv_free(l_set);
1229                         goto oom;
1230                 }
1231
1232                 f = strv_env_merge(2, e, l_set);
1233                 strv_free(l_set);
1234                 strv_free(e);
1235
1236                 if (!f)
1237                         goto oom;
1238
1239                 if (!(reply = dbus_message_new_method_return(message))) {
1240                         strv_free(f);
1241                         goto oom;
1242                 }
1243
1244                 strv_free(m->environment);
1245                 m->environment = f;
1246         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListUnitFiles")) {
1247                 DBusMessageIter iter, sub, sub2;
1248                 Hashmap *h;
1249                 Iterator i;
1250                 UnitFileList *item;
1251
1252                 reply = dbus_message_new_method_return(message);
1253                 if (!reply)
1254                         goto oom;
1255
1256                 h = hashmap_new(string_hash_func, string_compare_func);
1257                 if (!h)
1258                         goto oom;
1259
1260                 r = unit_file_get_list(m->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, NULL, h);
1261                 if (r < 0) {
1262                         unit_file_list_free(h);
1263                         dbus_message_unref(reply);
1264                         return bus_send_error_reply(connection, message, NULL, r);
1265                 }
1266
1267                 dbus_message_iter_init_append(reply, &iter);
1268
1269                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(ss)", &sub)) {
1270                         unit_file_list_free(h);
1271                         goto oom;
1272                 }
1273
1274                 HASHMAP_FOREACH(item, h, i) {
1275                         const char *state;
1276
1277                         state = unit_file_state_to_string(item->state);
1278                         assert(state);
1279
1280                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) ||
1281                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &item->path) ||
1282                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &state) ||
1283                             !dbus_message_iter_close_container(&sub, &sub2)) {
1284                                 unit_file_list_free(h);
1285                                 goto oom;
1286                         }
1287                 }
1288
1289                 unit_file_list_free(h);
1290
1291                 if (!dbus_message_iter_close_container(&iter, &sub))
1292                         goto oom;
1293
1294         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnitFileState")) {
1295                 const char *name;
1296                 UnitFileState state;
1297                 const char *s;
1298
1299                 if (!dbus_message_get_args(
1300                                     message,
1301                                     &error,
1302                                     DBUS_TYPE_STRING, &name,
1303                                     DBUS_TYPE_INVALID))
1304                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1305
1306                 state = unit_file_get_state(m->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, NULL, name);
1307                 if (state < 0)
1308                         return bus_send_error_reply(connection, message, NULL, state);
1309
1310                 s = unit_file_state_to_string(state);
1311                 assert(s);
1312
1313                 reply = dbus_message_new_method_return(message);
1314                 if (!reply)
1315                         goto oom;
1316
1317                 if (!dbus_message_append_args(
1318                                     reply,
1319                                     DBUS_TYPE_STRING, &s,
1320                                     DBUS_TYPE_INVALID))
1321                         goto oom;
1322         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "EnableUnitFiles") ||
1323                    dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReenableUnitFiles") ||
1324                    dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "LinkUnitFiles") ||
1325                    dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "PresetUnitFiles") ||
1326                    dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "MaskUnitFiles")) {
1327
1328                 char **l = NULL;
1329                 DBusMessageIter iter;
1330                 UnitFileScope scope = m->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER;
1331                 UnitFileChange *changes = NULL;
1332                 unsigned n_changes = 0;
1333                 dbus_bool_t runtime, force;
1334                 int carries_install_info = -1;
1335
1336                 if (!dbus_message_iter_init(message, &iter))
1337                         goto oom;
1338
1339                 r = bus_parse_strv_iter(&iter, &l);
1340                 if (r < 0) {
1341                         if (r == -ENOMEM)
1342                                 goto oom;
1343
1344                         return bus_send_error_reply(connection, message, NULL, r);
1345                 }
1346
1347                 if (!dbus_message_iter_next(&iter) ||
1348                     bus_iter_get_basic_and_next(&iter, DBUS_TYPE_BOOLEAN, &runtime, true) < 0 ||
1349                     bus_iter_get_basic_and_next(&iter, DBUS_TYPE_BOOLEAN, &force, false) < 0) {
1350                         strv_free(l);
1351                         return bus_send_error_reply(connection, message, NULL, -EIO);
1352                 }
1353
1354                 if (streq(member, "EnableUnitFiles")) {
1355                         r = unit_file_enable(scope, runtime, NULL, l, force, &changes, &n_changes);
1356                         carries_install_info = r;
1357                 } else if (streq(member, "ReenableUnitFiles")) {
1358                         r = unit_file_reenable(scope, runtime, NULL, l, force, &changes, &n_changes);
1359                         carries_install_info = r;
1360                 } else if (streq(member, "LinkUnitFiles"))
1361                         r = unit_file_link(scope, runtime, NULL, l, force, &changes, &n_changes);
1362                 else if (streq(member, "PresetUnitFiles")) {
1363                         r = unit_file_preset(scope, runtime, NULL, l, force, &changes, &n_changes);
1364                         carries_install_info = r;
1365                 } else if (streq(member, "MaskUnitFiles"))
1366                         r = unit_file_mask(scope, runtime, NULL, l, force, &changes, &n_changes);
1367                 else
1368                         assert_not_reached("Uh? Wrong method");
1369
1370                 strv_free(l);
1371                 bus_manager_send_unit_files_changed(m);
1372
1373                 if (r < 0) {
1374                         unit_file_changes_free(changes, n_changes);
1375                         return bus_send_error_reply(connection, message, NULL, r);
1376                 }
1377
1378                 reply = message_from_file_changes(message, changes, n_changes, carries_install_info);
1379                 unit_file_changes_free(changes, n_changes);
1380
1381                 if (!reply)
1382                         goto oom;
1383
1384         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "DisableUnitFiles") ||
1385                    dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "UnmaskUnitFiles")) {
1386
1387                 char **l = NULL;
1388                 DBusMessageIter iter;
1389                 UnitFileScope scope = m->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER;
1390                 UnitFileChange *changes = NULL;
1391                 unsigned n_changes = 0;
1392                 dbus_bool_t runtime;
1393
1394                 if (!dbus_message_iter_init(message, &iter))
1395                         goto oom;
1396
1397                 r = bus_parse_strv_iter(&iter, &l);
1398                 if (r < 0) {
1399                         if (r == -ENOMEM)
1400                                 goto oom;
1401
1402                         return bus_send_error_reply(connection, message, NULL, r);
1403                 }
1404
1405                 if (!dbus_message_iter_next(&iter) ||
1406                     bus_iter_get_basic_and_next(&iter, DBUS_TYPE_BOOLEAN, &runtime, false) < 0) {
1407                         strv_free(l);
1408                         return bus_send_error_reply(connection, message, NULL, -EIO);
1409                 }
1410
1411                 if (streq(member, "DisableUnitFiles"))
1412                         r = unit_file_disable(scope, runtime, NULL, l, &changes, &n_changes);
1413                 else if (streq(member, "UnmaskUnitFiles"))
1414                         r = unit_file_unmask(scope, runtime, NULL, l, &changes, &n_changes);
1415                 else
1416                         assert_not_reached("Uh? Wrong method");
1417
1418                 strv_free(l);
1419                 bus_manager_send_unit_files_changed(m);
1420
1421                 if (r < 0) {
1422                         unit_file_changes_free(changes, n_changes);
1423                         return bus_send_error_reply(connection, message, NULL, r);
1424                 }
1425
1426                 reply = message_from_file_changes(message, changes, n_changes, -1);
1427                 unit_file_changes_free(changes, n_changes);
1428
1429                 if (!reply)
1430                         goto oom;
1431
1432         } else {
1433                 const BusBoundProperties bps[] = {
1434                         { "org.freedesktop.systemd1.Manager", bus_systemd_properties, systemd_property_string },
1435                         { "org.freedesktop.systemd1.Manager", bus_manager_properties, m },
1436                         { NULL, }
1437                 };
1438                 return bus_default_message_handler(connection, message, NULL, INTERFACES_LIST, bps);
1439         }
1440
1441         if (job_type != _JOB_TYPE_INVALID) {
1442                 const char *name, *smode, *old_name = NULL;
1443                 JobMode mode;
1444                 Job *j;
1445                 Unit *u;
1446                 bool b;
1447
1448                 if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StartUnitReplace"))
1449                         b = dbus_message_get_args(
1450                                         message,
1451                                         &error,
1452                                         DBUS_TYPE_STRING, &old_name,
1453                                         DBUS_TYPE_STRING, &name,
1454                                         DBUS_TYPE_STRING, &smode,
1455                                         DBUS_TYPE_INVALID);
1456                 else
1457                         b = dbus_message_get_args(
1458                                         message,
1459                                         &error,
1460                                         DBUS_TYPE_STRING, &name,
1461                                         DBUS_TYPE_STRING, &smode,
1462                                         DBUS_TYPE_INVALID);
1463
1464                 if (!b)
1465                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1466
1467                 if (old_name)
1468                         if (!(u = manager_get_unit(m, old_name)) ||
1469                             !u->job ||
1470                             u->job->type != JOB_START) {
1471                                 dbus_set_error(&error, BUS_ERROR_NO_SUCH_JOB, "No job queued for unit %s", old_name);
1472                                 return bus_send_error_reply(connection, message, &error, -ENOENT);
1473                         }
1474
1475
1476                 if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) {
1477                         dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
1478                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1479                 }
1480
1481                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
1482                         return bus_send_error_reply(connection, message, &error, r);
1483
1484                 if (reload_if_possible && unit_can_reload(u)) {
1485                         if (job_type == JOB_RESTART)
1486                                 job_type = JOB_RELOAD_OR_START;
1487                         else if (job_type == JOB_TRY_RESTART)
1488                                 job_type = JOB_RELOAD;
1489                 }
1490
1491                 if ((job_type == JOB_START && u->refuse_manual_start) ||
1492                     (job_type == JOB_STOP && u->refuse_manual_stop) ||
1493                     ((job_type == JOB_RESTART || job_type == JOB_TRY_RESTART) &&
1494                      (u->refuse_manual_start || u->refuse_manual_stop))) {
1495                         dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, may be requested by dependency only.");
1496                         return bus_send_error_reply(connection, message, &error, -EPERM);
1497                 }
1498
1499                 if ((r = manager_add_job(m, job_type, u, mode, true, &error, &j)) < 0)
1500                         return bus_send_error_reply(connection, message, &error, r);
1501
1502                 if (!(j->bus_client = strdup(message_get_sender_with_fallback(message))))
1503                         goto oom;
1504
1505                 j->bus = connection;
1506
1507                 if (!(reply = dbus_message_new_method_return(message)))
1508                         goto oom;
1509
1510                 if (!(path = job_dbus_path(j)))
1511                         goto oom;
1512
1513                 if (!dbus_message_append_args(
1514                                     reply,
1515                                     DBUS_TYPE_OBJECT_PATH, &path,
1516                                     DBUS_TYPE_INVALID))
1517                         goto oom;
1518         }
1519
1520         if (reply) {
1521                 if (!dbus_connection_send(connection, reply, NULL))
1522                         goto oom;
1523
1524                 dbus_message_unref(reply);
1525         }
1526
1527         free(path);
1528
1529         return DBUS_HANDLER_RESULT_HANDLED;
1530
1531 oom:
1532         free(path);
1533
1534         if (reply)
1535                 dbus_message_unref(reply);
1536
1537         dbus_error_free(&error);
1538
1539         return DBUS_HANDLER_RESULT_NEED_MEMORY;
1540 }
1541
1542 const DBusObjectPathVTable bus_manager_vtable = {
1543         .message_function = bus_manager_message_handler
1544 };