src/hostname/hostnamed.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <errno.h>
   4 #include <sys/utsname.h>
   5 #include <sys/stat.h>
   6 #include <sys/types.h>
   7 #include <unistd.h>
   8
   9 #include "alloc-util.h"
  10 #include "bus-common-errors.h"
  11 #include "bus-get-properties.h"
  12 #include "bus-log-control-api.h"
  13 #include "bus-polkit.h"
  14 #include "constants.h"
  15 #include "env-file-label.h"
  16 #include "env-file.h"
  17 #include "env-util.h"
  18 #include "fileio-label.h"
  19 #include "fileio.h"
  20 #include "hostname-setup.h"
  21 #include "hostname-util.h"
  22 #include "id128-util.h"
  23 #include "json.h"
  24 #include "main-func.h"
  25 #include "missing_capability.h"
  26 #include "nscd-flush.h"
  27 #include "nulstr-util.h"
  28 #include "os-util.h"
  29 #include "parse-util.h"
  30 #include "path-util.h"
  31 #include "sd-device.h"
  32 #include "selinux-util.h"
  33 #include "service-util.h"
  34 #include "signal-util.h"
  35 #include "stat-util.h"
  36 #include "string-table.h"
  37 #include "strv.h"
  38 #include "user-util.h"
  39 #include "virt.h"
  40
  41 #define VALID_DEPLOYMENT_CHARS (DIGITS LETTERS "-.:")
  42
  43 /* Properties we cache are indexed by an enum, to make invalidation easy and systematic (as we can iterate
  44  * through them all, and they are uniformly strings). */
  45 typedef enum {
  46         /* Read from /etc/hostname */
  47         PROP_STATIC_HOSTNAME,
  48
  49         /* Read from /etc/machine-info */
  50         PROP_PRETTY_HOSTNAME,
  51         PROP_ICON_NAME,
  52         PROP_CHASSIS,
  53         PROP_DEPLOYMENT,
  54         PROP_LOCATION,
  55         PROP_HARDWARE_VENDOR,
  56         PROP_HARDWARE_MODEL,
  57
  58         /* Read from /etc/os-release (or /usr/lib/os-release) */
  59         PROP_OS_PRETTY_NAME,
  60         PROP_OS_CPE_NAME,
  61         PROP_OS_HOME_URL,
  62         _PROP_MAX,
  63         _PROP_INVALID = -EINVAL,
  64 } HostProperty;
  65
  66 typedef struct Context {
  67         char *data[_PROP_MAX];
  68
  69         HostnameSource hostname_source;
  70
  71         struct stat etc_hostname_stat;
  72         struct stat etc_os_release_stat;
  73         struct stat etc_machine_info_stat;
  74
  75         Hashmap *polkit_registry;
  76 } Context;
  77
  78 static void context_reset(Context *c, uint64_t mask) {
  79         assert(c);
  80
  81         for (int p = 0; p < _PROP_MAX; p++) {
  82                 if (!FLAGS_SET(mask, UINT64_C(1) << p))
  83                         continue;
  84
  85                 c->data[p] = mfree(c->data[p]);
  86         }
  87 }
  88
  89 static void context_destroy(Context *c) {
  90         assert(c);
  91
  92         context_reset(c, UINT64_MAX);
  93         bus_verify_polkit_async_registry_free(c->polkit_registry);
  94 }
  95
  96 static void context_read_etc_hostname(Context *c) {
  97         struct stat current_stat = {};
  98         int r;
  99
 100         assert(c);
 101
 102         if (stat("/etc/hostname", &current_stat) >= 0 &&
 103             stat_inode_unmodified(&c->etc_hostname_stat, &current_stat))
 104                 return;
 105
 106         context_reset(c, UINT64_C(1) << PROP_STATIC_HOSTNAME);
 107
 108         r = read_etc_hostname(NULL, &c->data[PROP_STATIC_HOSTNAME]);
 109         if (r < 0 && r != -ENOENT)
 110                 log_warning_errno(r, "Failed to read /etc/hostname, ignoring: %m");
 111
 112         c->etc_hostname_stat = current_stat;
 113 }
 114
 115 static void context_read_machine_info(Context *c) {
 116         struct stat current_stat = {};
 117         int r;
 118
 119         assert(c);
 120
 121         if (stat("/etc/machine-info", &current_stat) >= 0 &&
 122             stat_inode_unmodified(&c->etc_machine_info_stat, &current_stat))
 123                 return;
 124
 125         context_reset(c,
 126                       (UINT64_C(1) << PROP_PRETTY_HOSTNAME) |
 127                       (UINT64_C(1) << PROP_ICON_NAME) |
 128                       (UINT64_C(1) << PROP_CHASSIS) |
 129                       (UINT64_C(1) << PROP_DEPLOYMENT) |
 130                       (UINT64_C(1) << PROP_LOCATION) |
 131                       (UINT64_C(1) << PROP_HARDWARE_VENDOR) |
 132                       (UINT64_C(1) << PROP_HARDWARE_MODEL));
 133
 134         r = parse_env_file(NULL, "/etc/machine-info",
 135                            "PRETTY_HOSTNAME", &c->data[PROP_PRETTY_HOSTNAME],
 136                            "ICON_NAME", &c->data[PROP_ICON_NAME],
 137                            "CHASSIS", &c->data[PROP_CHASSIS],
 138                            "DEPLOYMENT", &c->data[PROP_DEPLOYMENT],
 139                            "LOCATION", &c->data[PROP_LOCATION],
 140                            "HARDWARE_VENDOR", &c->data[PROP_HARDWARE_VENDOR],
 141                            "HARDWARE_MODEL", &c->data[PROP_HARDWARE_MODEL]);
 142         if (r < 0 && r != -ENOENT)
 143                 log_warning_errno(r, "Failed to read /etc/machine-info, ignoring: %m");
 144
 145         c->etc_machine_info_stat = current_stat;
 146 }
 147
 148 static void context_read_os_release(Context *c) {
 149         struct stat current_stat = {};
 150         int r;
 151
 152         assert(c);
 153
 154         if ((stat("/etc/os-release", &current_stat) >= 0 ||
 155              stat("/usr/lib/os-release", &current_stat) >= 0) &&
 156             stat_inode_unmodified(&c->etc_os_release_stat, &current_stat))
 157                 return;
 158
 159         context_reset(c,
 160                       (UINT64_C(1) << PROP_OS_PRETTY_NAME) |
 161                       (UINT64_C(1) << PROP_OS_CPE_NAME) |
 162                       (UINT64_C(1) << PROP_OS_HOME_URL));
 163
 164         r = parse_os_release(NULL,
 165                              "PRETTY_NAME", &c->data[PROP_OS_PRETTY_NAME],
 166                              "CPE_NAME", &c->data[PROP_OS_CPE_NAME],
 167                              "HOME_URL", &c->data[PROP_OS_HOME_URL]);
 168         if (r < 0 && r != -ENOENT)
 169                 log_warning_errno(r, "Failed to read os-release file, ignoring: %m");
 170
 171         c->etc_os_release_stat = current_stat;
 172 }
 173
 174 static int get_dmi_data(const char *database_key, const char *regular_key, char **ret) {
 175         _cleanup_(sd_device_unrefp) sd_device *device = NULL;
 176         _cleanup_free_ char *b = NULL;
 177         const char *s = NULL;
 178         int r;
 179
 180         r = sd_device_new_from_syspath(&device, "/sys/class/dmi/id");
 181         if (r < 0)
 182                 return log_debug_errno(r, "Failed to open /sys/class/dmi/id device, ignoring: %m");
 183
 184         if (database_key)
 185                 (void) sd_device_get_property_value(device, database_key, &s);
 186         if (!s && regular_key)
 187                 (void) sd_device_get_property_value(device, regular_key, &s);
 188
 189         if (!ret)
 190                 return !!s;
 191
 192         if (s) {
 193                 b = strdup(s);
 194                 if (!b)
 195                         return -ENOMEM;
 196         }
 197
 198         *ret = TAKE_PTR(b);
 199         return !!s;
 200 }
 201
 202 static int get_hardware_vendor(char **ret) {
 203         return get_dmi_data("ID_VENDOR_FROM_DATABASE", "ID_VENDOR", ret);
 204 }
 205
 206 static int get_hardware_model(char **ret) {
 207         return get_dmi_data("ID_MODEL_FROM_DATABASE", "ID_MODEL", ret);
 208 }
 209
 210 static int get_hardware_firmware_data(const char *sysattr, char **ret) {
 211         _cleanup_(sd_device_unrefp) sd_device *device = NULL;
 212         _cleanup_free_ char *b = NULL;
 213         const char *s = NULL;
 214         int r;
 215
 216         assert(sysattr);
 217
 218         r = sd_device_new_from_syspath(&device, "/sys/class/dmi/id");
 219         if (r < 0)
 220                 return log_debug_errno(r, "Failed to open /sys/class/dmi/id device, ignoring: %m");
 221
 222         (void) sd_device_get_sysattr_value(device, sysattr, &s);
 223         if (!isempty(s)) {
 224                 b = strdup(s);
 225                 if (!b)
 226                         return -ENOMEM;
 227         }
 228
 229         if (ret)
 230                 *ret = TAKE_PTR(b);
 231
 232         return !isempty(s);
 233 }
 234
 235 static int get_hardware_serial(char **ret) {
 236          int r;
 237
 238          r = get_hardware_firmware_data("product_serial", ret);
 239          if (r <= 0)
 240                 return get_hardware_firmware_data("board_serial", ret);
 241
 242          return r;
 243 }
 244
 245 static int get_firmware_version(char **ret) {
 246          return get_hardware_firmware_data("bios_version", ret);
 247 }
 248
 249 static int get_firmware_vendor(char **ret) {
 250          return get_hardware_firmware_data("bios_vendor", ret);
 251 }
 252
 253 static int get_firmware_date(usec_t *ret) {
 254          _cleanup_free_ char *bios_date = NULL, *month = NULL, *day = NULL, *year = NULL;
 255          int r;
 256
 257          assert(ret);
 258
 259          r = get_hardware_firmware_data("bios_date", &bios_date);
 260          if (r < 0)
 261                 return r;
 262          if (r == 0) {
 263                 *ret = USEC_INFINITY;
 264                 return 0;
 265          }
 266
 267          const char *p = bios_date;
 268          r = extract_many_words(&p, "/", EXTRACT_DONT_COALESCE_SEPARATORS, &month, &day, &year, NULL);
 269          if (r < 0)
 270                 return r;
 271          if (r != 3) /* less than three args read? */
 272                 return -EINVAL;
 273          if (!isempty(p)) /* more left in the string? */
 274                 return -EINVAL;
 275
 276          unsigned m, d, y;
 277          r = safe_atou(month, &m);
 278          if (r < 0)
 279                 return r;
 280          if (m < 1 || m > 12)
 281                 return -EINVAL;
 282          m -= 1;
 283
 284          r = safe_atou(day, &d);
 285          if (r < 0)
 286                 return r;
 287          if (d < 1 || d > 31)
 288                 return -EINVAL;
 289
 290          r = safe_atou(year, &y);
 291          if (r < 0)
 292                 return r;
 293          if (y < 1970 || y > (unsigned) INT_MAX)
 294                 return -EINVAL;
 295          y -= 1900;
 296
 297          struct tm tm = {
 298                 .tm_mday = d,
 299                 .tm_mon = m,
 300                 .tm_year = y,
 301          };
 302          time_t v = timegm(&tm);
 303          if (v == (time_t) -1)
 304                 return -errno;
 305          if (tm.tm_mday != (int) d || tm.tm_mon != (int) m || tm.tm_year != (int) y)
 306                 return -EINVAL; /* date was not normalized? (e.g. "30th of feb") */
 307
 308          *ret = (usec_t) v * USEC_PER_SEC;
 309
 310          return 0;
 311 }
 312
 313 static const char* valid_chassis(const char *chassis) {
 314         assert(chassis);
 315
 316         return nulstr_get(
 317                         "vm\0"
 318                         "container\0"
 319                         "desktop\0"
 320                         "laptop\0"
 321                         "convertible\0"
 322                         "server\0"
 323                         "tablet\0"
 324                         "handset\0"
 325                         "watch\0"
 326                         "embedded\0",
 327                         chassis);
 328 }
 329
 330 static bool valid_deployment(const char *deployment) {
 331         assert(deployment);
 332
 333         return in_charset(deployment, VALID_DEPLOYMENT_CHARS);
 334 }
 335
 336 static const char* fallback_chassis(void) {
 337         const char *chassis;
 338         _cleanup_free_ char *type = NULL;
 339         Virtualization v;
 340         unsigned t;
 341         int r;
 342
 343         v = detect_virtualization();
 344         if (v < 0)
 345                 log_debug_errno(v, "Failed to detect virtualization, ignoring: %m");
 346         else if (VIRTUALIZATION_IS_VM(v))
 347                 return "vm";
 348         else if (VIRTUALIZATION_IS_CONTAINER(v))
 349                 return "container";
 350
 351         r = read_one_line_file("/sys/class/dmi/id/chassis_type", &type);
 352         if (r < 0) {
 353                 log_debug_errno(r, "Failed to read DMI chassis type, ignoring: %m");
 354                 goto try_acpi;
 355         }
 356
 357         r = safe_atou(type, &t);
 358         if (r < 0) {
 359                 log_debug_errno(r, "Failed to parse DMI chassis type \"%s\", ignoring: %m", type);
 360                 goto try_acpi;
 361         }
 362
 363         /* We only list the really obvious cases here. The DMI data is unreliable enough, so let's not do any
 364          * additional guesswork on top of that.
 365          *
 366          * See the SMBIOS Specification 3.5.0 section 7.4.1 for details about the values listed here:
 367          *
 368          * https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.5.0.pdf
 369          */
 370
 371         switch (t) {
 372
 373         case 0x03: /* Desktop */
 374         case 0x04: /* Low Profile Desktop */
 375         case 0x06: /* Mini Tower */
 376         case 0x07: /* Tower */
 377         case 0x0D: /* All in one (i.e. PC built into monitor) */
 378         case 0x23: /* Mini PC */
 379         case 0x24: /* Stick PC */
 380                 return "desktop";
 381
 382         case 0x8: /* Portable */
 383         case 0x9: /* Laptop */
 384         case 0xA: /* Notebook */
 385         case 0xE: /* Sub Notebook */
 386                 return "laptop";
 387
 388         case 0xB: /* Hand Held */
 389                 return "handset";
 390
 391         case 0x11: /* Main Server Chassis */
 392         case 0x1C: /* Blade */
 393         case 0x1D: /* Blade Enclosure */
 394                 return "server";
 395
 396         case 0x1E: /* Tablet */
 397                 return "tablet";
 398
 399         case 0x1F: /* Convertible */
 400         case 0x20: /* Detachable */
 401                 return "convertible";
 402
 403         case 0x21: /* IoT Gateway */
 404         case 0x22: /* Embedded PC */
 405                 return "embedded";
 406
 407         default:
 408                 log_debug("Unhandled DMI chassis type 0x%02x, ignoring.", t);
 409         }
 410
 411 try_acpi:
 412         type = mfree(type);
 413         r = read_one_line_file("/sys/firmware/acpi/pm_profile", &type);
 414         if (r < 0) {
 415                 log_debug_errno(r, "Failed read ACPI PM profile, ignoring: %m");
 416                 goto try_devicetree;
 417         }
 418
 419         r = safe_atou(type, &t);
 420         if (r < 0) {
 421                 log_debug_errno(r, "Failed parse ACPI PM profile \"%s\", ignoring: %m", type);
 422                 goto try_devicetree;
 423         }
 424
 425         /* We only list the really obvious cases here as the ACPI data is not really super reliable.
 426          *
 427          * See the ACPI 5.0 Spec Section 5.2.9.1 for details:
 428          *
 429          * http://www.acpi.info/DOWNLOADS/ACPIspec50.pdf
 430          */
 431
 432         switch (t) {
 433
 434         case 1: /* Desktop */
 435         case 3: /* Workstation */
 436         case 6: /* Appliance PC */
 437                 return "desktop";
 438
 439         case 2: /* Mobile */
 440                 return "laptop";
 441
 442         case 4: /* Enterprise Server */
 443         case 5: /* SOHO Server */
 444         case 7: /* Performance Server */
 445                 return "server";
 446
 447         case 8: /* Tablet */
 448                 return "tablet";
 449
 450         default:
 451                 log_debug("Unhandled ACPI PM profile 0x%02x, ignoring.", t);
 452         }
 453
 454 try_devicetree:
 455         type = mfree(type);
 456         r = read_one_line_file("/proc/device-tree/chassis-type", &type);
 457         if (r < 0) {
 458                 log_debug_errno(r, "Failed to read device-tree chassis type, ignoring: %m");
 459                 return NULL;
 460         }
 461
 462         /* Note that the Devicetree specification uses the very same vocabulary
 463          * of chassis types as we do, hence we do not need to translate these types:
 464          *
 465          * https://github.com/devicetree-org/devicetree-specification/blob/master/source/chapter3-devicenodes.rst */
 466         chassis = valid_chassis(type);
 467         if (!chassis)
 468                 log_debug("Invalid device-tree chassis type \"%s\", ignoring.", type);
 469         return chassis;
 470 }
 471
 472 static char* context_get_chassis(Context *c) {
 473         const char *fallback;
 474         char *dmi;
 475
 476         assert(c);
 477
 478         if (!isempty(c->data[PROP_CHASSIS]))
 479                 return strdup(c->data[PROP_CHASSIS]);
 480
 481         if (get_dmi_data("ID_CHASSIS", NULL, &dmi) > 0)
 482                 return dmi;
 483
 484         fallback = fallback_chassis();
 485         if (fallback)
 486                 return strdup(fallback);
 487
 488         return NULL;
 489 }
 490
 491 static char* context_fallback_icon_name(Context *c) {
 492         _cleanup_free_ char *chassis = NULL;
 493
 494         assert(c);
 495
 496         chassis = context_get_chassis(c);
 497         if (chassis)
 498                 return strjoin("computer-", chassis);
 499
 500         return strdup("computer");
 501 }
 502
 503 static int context_update_kernel_hostname(
 504                 Context *c,
 505                 const char *transient_hn) {
 506
 507         _cleanup_free_ char *_hn_free = NULL;
 508         const char *hn;
 509         HostnameSource hns;
 510         int r;
 511
 512         assert(c);
 513
 514         /* /etc/hostname has the highest preference ... */
 515         if (c->data[PROP_STATIC_HOSTNAME]) {
 516                 hn = c->data[PROP_STATIC_HOSTNAME];
 517                 hns = HOSTNAME_STATIC;
 518
 519         /* ... the transient hostname, (ie: DHCP) comes next ... */
 520         } else if (transient_hn) {
 521                 hn = transient_hn;
 522                 hns = HOSTNAME_TRANSIENT;
 523
 524         /* ... and the ultimate fallback */
 525         } else {
 526                 hn = _hn_free = get_default_hostname();
 527                 if (!hn)
 528                         return log_oom();
 529
 530                 hns = HOSTNAME_DEFAULT;
 531         }
 532
 533         r = sethostname_idempotent(hn);
 534         if (r < 0)
 535                 return log_error_errno(r, "Failed to set hostname: %m");
 536
 537         if (c->hostname_source != hns) {
 538                 c->hostname_source = hns;
 539                 r = 1;
 540         }
 541
 542         (void) nscd_flush_cache(STRV_MAKE("hosts"));
 543
 544         if (r == 0)
 545                 log_debug("Hostname was already set to <%s>.", hn);
 546         else {
 547                 log_info("Hostname set to <%s> (%s)", hn, hostname_source_to_string(hns));
 548
 549                 hostname_update_source_hint(hn, hns);
 550         }
 551
 552         return r; /* 0 if no change, 1 if something was done  */
 553 }
 554
 555 static void unset_statp(struct stat **p) {
 556         if (!*p)
 557                 return;
 558
 559         **p = (struct stat) {};
 560 }
 561
 562 static int context_write_data_static_hostname(Context *c) {
 563         _cleanup_(unset_statp) struct stat *s = NULL;
 564         int r;
 565
 566         assert(c);
 567
 568         /* Make sure that if we fail here, we invalidate the cached information, since it was updated
 569          * already, even if we can't make it hit the disk. */
 570         s = &c->etc_hostname_stat;
 571
 572         if (isempty(c->data[PROP_STATIC_HOSTNAME])) {
 573                 if (unlink("/etc/hostname") < 0 && errno != ENOENT)
 574                         return -errno;
 575
 576                 TAKE_PTR(s);
 577                 return 0;
 578         }
 579
 580         r = write_string_file_atomic_label("/etc/hostname", c->data[PROP_STATIC_HOSTNAME]);
 581         if (r < 0)
 582                 return r;
 583
 584         TAKE_PTR(s);
 585         return 0;
 586 }
 587
 588 static int context_write_data_machine_info(Context *c) {
 589         _cleanup_(unset_statp) struct stat *s = NULL;
 590         static const char * const name[_PROP_MAX] = {
 591                 [PROP_PRETTY_HOSTNAME] = "PRETTY_HOSTNAME",
 592                 [PROP_ICON_NAME] = "ICON_NAME",
 593                 [PROP_CHASSIS] = "CHASSIS",
 594                 [PROP_DEPLOYMENT] = "DEPLOYMENT",
 595                 [PROP_LOCATION] = "LOCATION",
 596         };
 597         _cleanup_strv_free_ char **l = NULL;
 598         int r;
 599
 600         assert(c);
 601
 602         /* Make sure that if we fail here, we invalidate the cached information, since it was updated
 603          * already, even if we can't make it hit the disk. */
 604         s = &c->etc_machine_info_stat;
 605
 606         r = load_env_file(NULL, "/etc/machine-info", &l);
 607         if (r < 0 && r != -ENOENT)
 608                 return r;
 609
 610         for (int p = PROP_PRETTY_HOSTNAME; p <= PROP_LOCATION; p++) {
 611                 assert(name[p]);
 612
 613                 r = strv_env_assign(&l, name[p], empty_to_null(c->data[p]));
 614                 if (r < 0)
 615                         return r;
 616         }
 617
 618         if (strv_isempty(l)) {
 619                 if (unlink("/etc/machine-info") < 0 && errno != ENOENT)
 620                         return -errno;
 621
 622                 TAKE_PTR(s);
 623                 return 0;
 624         }
 625
 626         r = write_env_file_label("/etc/machine-info", l);
 627         if (r < 0)
 628                 return r;
 629
 630         TAKE_PTR(s);
 631         return 0;
 632 }
 633
 634 static int property_get_hardware_property(
 635                 sd_bus_message *reply,
 636                 Context *c,
 637                 HostProperty prop,
 638                 int (*getter)(char **)) {
 639
 640         _cleanup_free_ char *from_dmi = NULL;
 641
 642         assert(reply);
 643         assert(c);
 644         assert(IN_SET(prop, PROP_HARDWARE_VENDOR, PROP_HARDWARE_MODEL));
 645         assert(getter);
 646
 647         context_read_machine_info(c);
 648
 649         if (isempty(c->data[prop]))
 650                 (void) getter(&from_dmi);
 651
 652         return sd_bus_message_append(reply, "s", from_dmi ?: c->data[prop]);
 653 }
 654
 655 static int property_get_hardware_vendor(
 656                 sd_bus *bus,
 657                 const char *path,
 658                 const char *interface,
 659                 const char *property,
 660                 sd_bus_message *reply,
 661                 void *userdata,
 662                 sd_bus_error *error) {
 663
 664         return property_get_hardware_property(reply, userdata, PROP_HARDWARE_VENDOR, get_hardware_vendor);
 665 }
 666
 667 static int property_get_hardware_model(
 668                 sd_bus *bus,
 669                 const char *path,
 670                 const char *interface,
 671                 const char *property,
 672                 sd_bus_message *reply,
 673                 void *userdata,
 674                 sd_bus_error *error) {
 675
 676         return property_get_hardware_property(reply, userdata, PROP_HARDWARE_MODEL, get_hardware_model);
 677 }
 678
 679 static int property_get_firmware_version(
 680                 sd_bus *bus,
 681                 const char *path,
 682                 const char *interface,
 683                 const char *property,
 684                 sd_bus_message *reply,
 685                 void *userdata,
 686                 sd_bus_error *error) {
 687
 688         _cleanup_free_ char *firmware_version = NULL;
 689
 690         (void) get_firmware_version(&firmware_version);
 691
 692         return sd_bus_message_append(reply, "s", firmware_version);
 693 }
 694
 695 static int property_get_firmware_vendor(
 696                 sd_bus *bus,
 697                 const char *path,
 698                 const char *interface,
 699                 const char *property,
 700                 sd_bus_message *reply,
 701                 void *userdata,
 702                 sd_bus_error *error) {
 703
 704         _cleanup_free_ char *firmware_vendor = NULL;
 705
 706         (void) get_firmware_vendor(&firmware_vendor);
 707
 708         return sd_bus_message_append(reply, "s", firmware_vendor);
 709 }
 710
 711 static int property_get_firmware_date(
 712                 sd_bus *bus,
 713                 const char *path,
 714                 const char *interface,
 715                 const char *property,
 716                 sd_bus_message *reply,
 717                 void *userdata,
 718                 sd_bus_error *error) {
 719
 720         usec_t firmware_date = USEC_INFINITY;
 721
 722         (void) get_firmware_date(&firmware_date);
 723
 724         return sd_bus_message_append(reply, "t", firmware_date);
 725 }
 726 static int property_get_hostname(
 727                 sd_bus *bus,
 728                 const char *path,
 729                 const char *interface,
 730                 const char *property,
 731                 sd_bus_message *reply,
 732                 void *userdata,
 733                 sd_bus_error *error) {
 734
 735         _cleanup_free_ char *hn = NULL;
 736         int r;
 737
 738         r = gethostname_strict(&hn);
 739         if (r < 0) {
 740                 if (r != -ENXIO)
 741                         return r;
 742
 743                 hn = get_default_hostname();
 744                 if (!hn)
 745                         return -ENOMEM;
 746         }
 747
 748         return sd_bus_message_append(reply, "s", hn);
 749 }
 750
 751 static int property_get_static_hostname(
 752                 sd_bus *bus,
 753                 const char *path,
 754                 const char *interface,
 755                 const char *property,
 756                 sd_bus_message *reply,
 757                 void *userdata,
 758                 sd_bus_error *error) {
 759
 760         Context *c = ASSERT_PTR(userdata);
 761
 762         context_read_etc_hostname(c);
 763
 764         return sd_bus_message_append(reply, "s", c->data[PROP_STATIC_HOSTNAME]);
 765 }
 766
 767 static int property_get_default_hostname(
 768                 sd_bus *bus,
 769                 const char *path,
 770                 const char *interface,
 771                 const char *property,
 772                 sd_bus_message *reply,
 773                 void *userdata,
 774                 sd_bus_error *error) {
 775
 776         _cleanup_free_ char *hn = NULL;
 777
 778         hn = get_default_hostname();
 779         if (!hn)
 780                 return log_oom();
 781
 782         return sd_bus_message_append(reply, "s", hn);
 783 }
 784
 785 static void context_determine_hostname_source(Context *c) {
 786         _cleanup_free_ char *hostname = NULL;
 787         int r;
 788
 789         assert(c);
 790
 791         if (c->hostname_source >= 0)
 792                 return;
 793
 794         (void) gethostname_full(GET_HOSTNAME_ALLOW_LOCALHOST, &hostname);
 795
 796         if (streq_ptr(hostname, c->data[PROP_STATIC_HOSTNAME]))
 797                 c->hostname_source = HOSTNAME_STATIC;
 798         else {
 799                 _cleanup_free_ char *fallback = NULL;
 800
 801                 /* If the hostname was not set by us, try to figure out where it came from. If we set it to
 802                  * the default hostname, the file will tell us. We compare the string because it is possible
 803                  * that the hostname was set by an older version that had a different fallback, in the initrd
 804                  * or before we reexecuted. */
 805
 806                 r = read_one_line_file("/run/systemd/default-hostname", &fallback);
 807                 if (r < 0 && r != -ENOENT)
 808                         log_warning_errno(r, "Failed to read /run/systemd/default-hostname, ignoring: %m");
 809
 810                 if (streq_ptr(fallback, hostname))
 811                         c->hostname_source = HOSTNAME_DEFAULT;
 812                 else
 813                         c->hostname_source = HOSTNAME_TRANSIENT;
 814         }
 815 }
 816
 817 static int property_get_hostname_source(
 818                 sd_bus *bus,
 819                 const char *path,
 820                 const char *interface,
 821                 const char *property,
 822                 sd_bus_message *reply,
 823                 void *userdata,
 824                 sd_bus_error *error) {
 825
 826         Context *c = ASSERT_PTR(userdata);
 827
 828         context_read_etc_hostname(c);
 829         context_determine_hostname_source(c);
 830
 831         return sd_bus_message_append(reply, "s", hostname_source_to_string(c->hostname_source));
 832 }
 833
 834 static int property_get_machine_info_field(
 835                 sd_bus *bus,
 836                 const char *path,
 837                 const char *interface,
 838                 const char *property,
 839                 sd_bus_message *reply,
 840                 void *userdata,
 841                 sd_bus_error *error) {
 842
 843         sd_bus_slot *slot;
 844         Context *c;
 845
 846         /* Acquire the context object without this property's userdata offset added. Explanation: we want
 847          * access to two pointers here: a) the main context object we cache all properties in, and b) the
 848          * pointer to the property field inside the context object that we are supposed to update and
 849          * use. The latter (b) we get in the 'userdata' function parameter, and sd-bus calculates that for us
 850          * from the 'userdata' pointer we supplied when the vtable was registered, with the offset we
 851          * specified in the vtable added on top. To get the former (a) we need the 'userdata' pointer from
 852          * the vtable registration directly, without the offset added. Hence we ask sd-bus what the slot
 853          * object is (which encapsulates the vtable registration), and then query the 'userdata' field
 854          * directly off it. */
 855         assert_se(slot = sd_bus_get_current_slot(bus));
 856         assert_se(c = sd_bus_slot_get_userdata(slot));
 857
 858         context_read_machine_info(c);
 859
 860         return sd_bus_message_append(reply, "s", *(char**) userdata);
 861 }
 862
 863 static int property_get_os_release_field(
 864                 sd_bus *bus,
 865                 const char *path,
 866                 const char *interface,
 867                 const char *property,
 868                 sd_bus_message *reply,
 869                 void *userdata,
 870                 sd_bus_error *error) {
 871
 872         sd_bus_slot *slot;
 873         Context *c;
 874
 875         /* As above, acquire the current context without this property's userdata offset added. */
 876         assert_se(slot = sd_bus_get_current_slot(bus));
 877         assert_se(c = sd_bus_slot_get_userdata(slot));
 878
 879         context_read_os_release(c);
 880
 881         return sd_bus_message_append(reply, "s", *(char**) userdata);
 882 }
 883
 884 static int property_get_icon_name(
 885                 sd_bus *bus,
 886                 const char *path,
 887                 const char *interface,
 888                 const char *property,
 889                 sd_bus_message *reply,
 890                 void *userdata,
 891                 sd_bus_error *error) {
 892
 893         _cleanup_free_ char *n = NULL;
 894         Context *c = userdata;
 895         const char *name;
 896
 897         context_read_machine_info(c);
 898
 899         if (isempty(c->data[PROP_ICON_NAME]))
 900                 name = n = context_fallback_icon_name(c);
 901         else
 902                 name = c->data[PROP_ICON_NAME];
 903
 904         if (!name)
 905                 return -ENOMEM;
 906
 907         return sd_bus_message_append(reply, "s", name);
 908 }
 909
 910 static int property_get_chassis(
 911                 sd_bus *bus,
 912                 const char *path,
 913                 const char *interface,
 914                 const char *property,
 915                 sd_bus_message *reply,
 916                 void *userdata,
 917                 sd_bus_error *error) {
 918
 919         _cleanup_free_ char *chassis = NULL;
 920         Context *c = userdata;
 921
 922         context_read_machine_info(c);
 923
 924         chassis = context_get_chassis(c);
 925
 926         return sd_bus_message_append(reply, "s", chassis);
 927 }
 928
 929 static int property_get_uname_field(
 930                 sd_bus *bus,
 931                 const char *path,
 932                 const char *interface,
 933                 const char *property,
 934                 sd_bus_message *reply,
 935                 void *userdata,
 936                 sd_bus_error *error) {
 937
 938         struct utsname u;
 939
 940         assert_se(uname(&u) >= 0);
 941
 942         return sd_bus_message_append(reply, "s", (char*) &u + PTR_TO_SIZE(userdata));
 943 }
 944
 945 static int method_set_hostname(sd_bus_message *m, void *userdata, sd_bus_error *error) {
 946         Context *c = ASSERT_PTR(userdata);
 947         const char *name;
 948         int interactive, r;
 949
 950         assert(m);
 951
 952         r = sd_bus_message_read(m, "sb", &name, &interactive);
 953         if (r < 0)
 954                 return r;
 955
 956         name = empty_to_null(name);
 957
 958         /* We always go through with the procedure below without comparing to the current hostname, because
 959          * we might want to adjust hostname source information even if the actual hostname is unchanged. */
 960
 961         if (name && !hostname_is_valid(name, 0))
 962                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid hostname '%s'", name);
 963
 964         context_read_etc_hostname(c);
 965
 966         r = bus_verify_polkit_async(
 967                         m,
 968                         CAP_SYS_ADMIN,
 969                         "org.freedesktop.hostname1.set-hostname",
 970                         NULL,
 971                         interactive,
 972                         UID_INVALID,
 973                         &c->polkit_registry,
 974                         error);
 975         if (r < 0)
 976                 return r;
 977         if (r == 0)
 978                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
 979
 980         r = context_update_kernel_hostname(c, name);
 981         if (r < 0)
 982                 return sd_bus_error_set_errnof(error, r, "Failed to set hostname: %m");
 983         else if (r > 0)
 984                 (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m),
 985                                                       "/org/freedesktop/hostname1", "org.freedesktop.hostname1",
 986                                                       "Hostname", "HostnameSource", NULL);
 987
 988         return sd_bus_reply_method_return(m, NULL);
 989 }
 990
 991 static int method_set_static_hostname(sd_bus_message *m, void *userdata, sd_bus_error *error) {
 992         Context *c = ASSERT_PTR(userdata);
 993         const char *name;
 994         int interactive;
 995         int r;
 996
 997         assert(m);
 998
 999         r = sd_bus_message_read(m, "sb", &name, &interactive);
1000         if (r < 0)
1001                 return r;
1002
1003         name = empty_to_null(name);
1004
1005         context_read_etc_hostname(c);
1006
1007         if (streq_ptr(name, c->data[PROP_STATIC_HOSTNAME]))
1008                 return sd_bus_reply_method_return(m, NULL);
1009
1010         if (name && !hostname_is_valid(name, 0))
1011                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid static hostname '%s'", name);
1012
1013         r = bus_verify_polkit_async(
1014                         m,
1015                         CAP_SYS_ADMIN,
1016                         "org.freedesktop.hostname1.set-static-hostname",
1017                         NULL,
1018                         interactive,
1019                         UID_INVALID,
1020                         &c->polkit_registry,
1021                         error);
1022         if (r < 0)
1023                 return r;
1024         if (r == 0)
1025                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1026
1027         r = free_and_strdup_warn(&c->data[PROP_STATIC_HOSTNAME], name);
1028         if (r < 0)
1029                 return r;
1030
1031         r = context_write_data_static_hostname(c);
1032         if (r < 0) {
1033                 log_error_errno(r, "Failed to write static hostname: %m");
1034                 if (ERRNO_IS_PRIVILEGE(r))
1035                         return sd_bus_error_set(error, BUS_ERROR_FILE_IS_PROTECTED, "Not allowed to update /etc/hostname.");
1036                 if (r == -EROFS)
1037                         return sd_bus_error_set(error, BUS_ERROR_READ_ONLY_FILESYSTEM, "/etc/hostname is in a read-only filesystem.");
1038                 return sd_bus_error_set_errnof(error, r, "Failed to set static hostname: %m");
1039         }
1040
1041         r = context_update_kernel_hostname(c, NULL);
1042         if (r < 0) {
1043                 log_error_errno(r, "Failed to set hostname: %m");
1044                 return sd_bus_error_set_errnof(error, r, "Failed to set hostname: %m");
1045         }
1046
1047         (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m),
1048                                               "/org/freedesktop/hostname1", "org.freedesktop.hostname1",
1049                                               "StaticHostname", "Hostname", "HostnameSource", NULL);
1050
1051         return sd_bus_reply_method_return(m, NULL);
1052 }
1053
1054 static int set_machine_info(Context *c, sd_bus_message *m, int prop, sd_bus_message_handler_t cb, sd_bus_error *error) {
1055         int interactive;
1056         const char *name;
1057         int r;
1058
1059         assert(c);
1060         assert(m);
1061
1062         r = sd_bus_message_read(m, "sb", &name, &interactive);
1063         if (r < 0)
1064                 return r;
1065
1066         name = empty_to_null(name);
1067
1068         context_read_machine_info(c);
1069
1070         if (streq_ptr(name, c->data[prop]))
1071                 return sd_bus_reply_method_return(m, NULL);
1072
1073         if (!isempty(name)) {
1074                 /* The icon name might ultimately be used as file
1075                  * name, so better be safe than sorry */
1076
1077                 if (prop == PROP_ICON_NAME && !filename_is_valid(name))
1078                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid icon name '%s'", name);
1079                 if (prop == PROP_PRETTY_HOSTNAME && string_has_cc(name, NULL))
1080                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid pretty hostname '%s'", name);
1081                 if (prop == PROP_CHASSIS && !valid_chassis(name))
1082                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid chassis '%s'", name);
1083                 if (prop == PROP_DEPLOYMENT && !valid_deployment(name))
1084                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid deployment '%s'", name);
1085                 if (prop == PROP_LOCATION && string_has_cc(name, NULL))
1086                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid location '%s'", name);
1087         }
1088
1089         /* Since the pretty hostname should always be changed at the
1090          * same time as the static one, use the same policy action for
1091          * both... */
1092
1093         r = bus_verify_polkit_async(
1094                         m,
1095                         CAP_SYS_ADMIN,
1096                         prop == PROP_PRETTY_HOSTNAME ? "org.freedesktop.hostname1.set-static-hostname" : "org.freedesktop.hostname1.set-machine-info",
1097                         NULL,
1098                         interactive,
1099                         UID_INVALID,
1100                         &c->polkit_registry,
1101                         error);
1102         if (r < 0)
1103                 return r;
1104         if (r == 0)
1105                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1106
1107         r = free_and_strdup_warn(&c->data[prop], name);
1108         if (r < 0)
1109                 return r;
1110
1111         r = context_write_data_machine_info(c);
1112         if (r < 0) {
1113                 log_error_errno(r, "Failed to write machine info: %m");
1114                 if (ERRNO_IS_PRIVILEGE(r))
1115                         return sd_bus_error_set(error, BUS_ERROR_FILE_IS_PROTECTED, "Not allowed to update /etc/machine-info.");
1116                 if (r == -EROFS)
1117                         return sd_bus_error_set(error, BUS_ERROR_READ_ONLY_FILESYSTEM, "/etc/machine-info is in a read-only filesystem.");
1118                 return sd_bus_error_set_errnof(error, r, "Failed to write machine info: %m");
1119         }
1120
1121         log_info("Changed %s to '%s'",
1122                  prop == PROP_PRETTY_HOSTNAME ? "pretty hostname" :
1123                  prop == PROP_DEPLOYMENT ? "deployment" :
1124                  prop == PROP_LOCATION ? "location" :
1125                  prop == PROP_CHASSIS ? "chassis" : "icon name", strna(c->data[prop]));
1126
1127         (void) sd_bus_emit_properties_changed(
1128                         sd_bus_message_get_bus(m),
1129                         "/org/freedesktop/hostname1",
1130                         "org.freedesktop.hostname1",
1131                         prop == PROP_PRETTY_HOSTNAME ? "PrettyHostname" :
1132                         prop == PROP_DEPLOYMENT ? "Deployment" :
1133                         prop == PROP_LOCATION ? "Location" :
1134                         prop == PROP_CHASSIS ? "Chassis" : "IconName" , NULL);
1135
1136         return sd_bus_reply_method_return(m, NULL);
1137 }
1138
1139 static int method_set_pretty_hostname(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1140         return set_machine_info(userdata, m, PROP_PRETTY_HOSTNAME, method_set_pretty_hostname, error);
1141 }
1142
1143 static int method_set_icon_name(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1144         return set_machine_info(userdata, m, PROP_ICON_NAME, method_set_icon_name, error);
1145 }
1146
1147 static int method_set_chassis(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1148         return set_machine_info(userdata, m, PROP_CHASSIS, method_set_chassis, error);
1149 }
1150
1151 static int method_set_deployment(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1152         return set_machine_info(userdata, m, PROP_DEPLOYMENT, method_set_deployment, error);
1153 }
1154
1155 static int method_set_location(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1156         return set_machine_info(userdata, m, PROP_LOCATION, method_set_location, error);
1157 }
1158
1159 static int method_get_product_uuid(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1160         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1161         Context *c = ASSERT_PTR(userdata);
1162         int interactive, r;
1163         sd_id128_t uuid;
1164
1165         assert(m);
1166
1167         r = sd_bus_message_read(m, "b", &interactive);
1168         if (r < 0)
1169                 return r;
1170
1171         r = bus_verify_polkit_async(
1172                         m,
1173                         CAP_SYS_ADMIN,
1174                         "org.freedesktop.hostname1.get-product-uuid",
1175                         NULL,
1176                         interactive,
1177                         UID_INVALID,
1178                         &c->polkit_registry,
1179                         error);
1180         if (r < 0)
1181                 return r;
1182         if (r == 0)
1183                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1184
1185         r = id128_get_product(&uuid);
1186         if (r < 0) {
1187                 if (r == -EADDRNOTAVAIL)
1188                         log_debug_errno(r, "DMI product UUID is all 0x00 or all 0xFF, ignoring.");
1189                 else
1190                         log_full_errno(r == -ENOENT ? LOG_DEBUG : LOG_WARNING, r,
1191                                        "Failed to read product UUID, ignoring: %m");
1192
1193                 return sd_bus_error_set(error, BUS_ERROR_NO_PRODUCT_UUID,
1194                                         "Failed to read product UUID from firmware.");
1195         }
1196
1197         r = sd_bus_message_new_method_return(m, &reply);
1198         if (r < 0)
1199                 return r;
1200
1201         r = sd_bus_message_append_array(reply, 'y', uuid.bytes, sizeof(uuid.bytes));
1202         if (r < 0)
1203                 return r;
1204
1205         return sd_bus_send(NULL, reply, NULL);
1206 }
1207
1208 static int method_get_hardware_serial(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1209         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1210         _cleanup_free_ char *serial = NULL;
1211         Context *c = ASSERT_PTR(userdata);
1212         int r;
1213
1214         assert(m);
1215
1216         r = bus_verify_polkit_async(
1217                         m,
1218                         CAP_SYS_ADMIN,
1219                         "org.freedesktop.hostname1.get-hardware-serial",
1220                         NULL,
1221                         false,
1222                         UID_INVALID,
1223                         &c->polkit_registry,
1224                         error);
1225         if (r < 0)
1226                 return r;
1227         if (r == 0)
1228                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1229
1230         r = get_hardware_serial(&serial);
1231         if (r < 0)
1232                 return r;
1233
1234         r = sd_bus_message_new_method_return(m, &reply);
1235         if (r < 0)
1236                 return r;
1237
1238         r = sd_bus_message_append(reply, "s", serial);
1239         if (r < 0)
1240                 return r;
1241
1242         return sd_bus_send(NULL, reply, NULL);
1243 }
1244
1245 static int method_describe(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1246         _cleanup_free_ char *hn = NULL, *dhn = NULL, *in = NULL, *text = NULL,
1247                 *chassis = NULL, *vendor = NULL, *model = NULL, *serial = NULL, *firmware_version = NULL,
1248                 *firmware_vendor = NULL;
1249         usec_t firmware_date = USEC_INFINITY;
1250         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1251         _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
1252         sd_id128_t product_uuid = SD_ID128_NULL;
1253         Context *c = ASSERT_PTR(userdata);
1254         bool privileged;
1255         struct utsname u;
1256         int r;
1257
1258         assert(m);
1259
1260         r = bus_verify_polkit_async(
1261                         m,
1262                         CAP_SYS_ADMIN,
1263                         "org.freedesktop.hostname1.get-description",
1264                         NULL,
1265                         false,
1266                         UID_INVALID,
1267                         &c->polkit_registry,
1268                         NULL);
1269         if (r == 0)
1270                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1271
1272         /* We ignore all authentication errors here, since most data is unprivileged, the one exception being
1273          * the product ID which we'll check explicitly. */
1274         privileged = r > 0;
1275
1276         context_read_etc_hostname(c);
1277         context_read_machine_info(c);
1278         context_read_os_release(c);
1279         context_determine_hostname_source(c);
1280
1281         r = gethostname_strict(&hn);
1282         if (r < 0) {
1283                 if (r != -ENXIO)
1284                         return log_error_errno(r, "Failed to read local host name: %m");
1285
1286                 hn = get_default_hostname();
1287                 if (!hn)
1288                         return log_oom();
1289         }
1290
1291         dhn = get_default_hostname();
1292         if (!dhn)
1293                 return log_oom();
1294
1295         if (isempty(c->data[PROP_ICON_NAME]))
1296                 in = context_fallback_icon_name(c);
1297
1298         chassis = context_get_chassis(c);
1299
1300         assert_se(uname(&u) >= 0);
1301
1302         if (isempty(c->data[PROP_HARDWARE_VENDOR]))
1303                 (void) get_hardware_vendor(&vendor);
1304         if (isempty(c->data[PROP_HARDWARE_MODEL]))
1305                 (void) get_hardware_model(&model);
1306
1307         if (privileged) {
1308                 /* The product UUID and hardware serial is only available to privileged clients */
1309                 (void) id128_get_product(&product_uuid);
1310                 (void) get_hardware_serial(&serial);
1311         }
1312         (void) get_firmware_version(&firmware_version);
1313         (void) get_firmware_vendor(&firmware_vendor);
1314         (void) get_firmware_date(&firmware_date);
1315
1316         r = json_build(&v, JSON_BUILD_OBJECT(
1317                                        JSON_BUILD_PAIR("Hostname", JSON_BUILD_STRING(hn)),
1318                                        JSON_BUILD_PAIR("StaticHostname", JSON_BUILD_STRING(c->data[PROP_STATIC_HOSTNAME])),
1319                                        JSON_BUILD_PAIR("PrettyHostname", JSON_BUILD_STRING(c->data[PROP_PRETTY_HOSTNAME])),
1320                                        JSON_BUILD_PAIR("DefaultHostname", JSON_BUILD_STRING(dhn)),
1321                                        JSON_BUILD_PAIR("HostnameSource", JSON_BUILD_STRING(hostname_source_to_string(c->hostname_source))),
1322                                        JSON_BUILD_PAIR("IconName", JSON_BUILD_STRING(in ?: c->data[PROP_ICON_NAME])),
1323                                        JSON_BUILD_PAIR("Chassis", JSON_BUILD_STRING(chassis)),
1324                                        JSON_BUILD_PAIR("Deployment", JSON_BUILD_STRING(c->data[PROP_DEPLOYMENT])),
1325                                        JSON_BUILD_PAIR("Location", JSON_BUILD_STRING(c->data[PROP_LOCATION])),
1326                                        JSON_BUILD_PAIR("KernelName", JSON_BUILD_STRING(u.sysname)),
1327                                        JSON_BUILD_PAIR("KernelRelease", JSON_BUILD_STRING(u.release)),
1328                                        JSON_BUILD_PAIR("KernelVersion", JSON_BUILD_STRING(u.version)),
1329                                        JSON_BUILD_PAIR("OperatingSystemPrettyName", JSON_BUILD_STRING(c->data[PROP_OS_PRETTY_NAME])),
1330                                        JSON_BUILD_PAIR("OperatingSystemCPEName", JSON_BUILD_STRING(c->data[PROP_OS_CPE_NAME])),
1331                                        JSON_BUILD_PAIR("OperatingSystemHomeURL", JSON_BUILD_STRING(c->data[PROP_OS_HOME_URL])),
1332                                        JSON_BUILD_PAIR("HardwareVendor", JSON_BUILD_STRING(vendor ?: c->data[PROP_HARDWARE_VENDOR])),
1333                                        JSON_BUILD_PAIR("HardwareModel", JSON_BUILD_STRING(model ?: c->data[PROP_HARDWARE_MODEL])),
1334                                        JSON_BUILD_PAIR("HardwareSerial", JSON_BUILD_STRING(serial)),
1335                                        JSON_BUILD_PAIR("FirmwareVersion", JSON_BUILD_STRING(firmware_version)),
1336                                        JSON_BUILD_PAIR("FirmwareVendor", JSON_BUILD_STRING(firmware_vendor)),
1337                                        JSON_BUILD_PAIR_FINITE_USEC("FirmwareDate", firmware_date),
1338                                        JSON_BUILD_PAIR_CONDITION(!sd_id128_is_null(product_uuid), "ProductUUID", JSON_BUILD_ID128(product_uuid)),
1339                                        JSON_BUILD_PAIR_CONDITION(sd_id128_is_null(product_uuid), "ProductUUID", JSON_BUILD_NULL)));
1340
1341         if (r < 0)
1342                 return log_error_errno(r, "Failed to build JSON data: %m");
1343
1344         r = json_variant_format(v, 0, &text);
1345         if (r < 0)
1346                 return log_error_errno(r, "Failed to format JSON data: %m");
1347
1348         r = sd_bus_message_new_method_return(m, &reply);
1349         if (r < 0)
1350                 return r;
1351
1352         r = sd_bus_message_append(reply, "s", text);
1353         if (r < 0)
1354                 return r;
1355
1356         return sd_bus_send(NULL, reply, NULL);
1357 }
1358
1359 static const sd_bus_vtable hostname_vtable[] = {
1360         SD_BUS_VTABLE_START(0),
1361         SD_BUS_PROPERTY("Hostname", "s", property_get_hostname, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1362         SD_BUS_PROPERTY("StaticHostname", "s", property_get_static_hostname, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1363         SD_BUS_PROPERTY("PrettyHostname", "s", property_get_machine_info_field, offsetof(Context, data) + sizeof(char*) * PROP_PRETTY_HOSTNAME, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1364         SD_BUS_PROPERTY("DefaultHostname", "s", property_get_default_hostname, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1365         SD_BUS_PROPERTY("HostnameSource", "s", property_get_hostname_source, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1366         SD_BUS_PROPERTY("IconName", "s", property_get_icon_name, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1367         SD_BUS_PROPERTY("Chassis", "s", property_get_chassis, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1368         SD_BUS_PROPERTY("Deployment", "s", property_get_machine_info_field, offsetof(Context, data) + sizeof(char*) * PROP_DEPLOYMENT, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1369         SD_BUS_PROPERTY("Location", "s", property_get_machine_info_field, offsetof(Context, data) + sizeof(char*) * PROP_LOCATION, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1370         SD_BUS_PROPERTY("KernelName", "s", property_get_uname_field, offsetof(struct utsname, sysname), SD_BUS_VTABLE_ABSOLUTE_OFFSET|SD_BUS_VTABLE_PROPERTY_CONST),
1371         SD_BUS_PROPERTY("KernelRelease", "s", property_get_uname_field, offsetof(struct utsname, release), SD_BUS_VTABLE_ABSOLUTE_OFFSET|SD_BUS_VTABLE_PROPERTY_CONST),
1372         SD_BUS_PROPERTY("KernelVersion", "s", property_get_uname_field, offsetof(struct utsname, version), SD_BUS_VTABLE_ABSOLUTE_OFFSET|SD_BUS_VTABLE_PROPERTY_CONST),
1373         SD_BUS_PROPERTY("OperatingSystemPrettyName", "s", property_get_os_release_field, offsetof(Context, data) + sizeof(char*) * PROP_OS_PRETTY_NAME, SD_BUS_VTABLE_PROPERTY_CONST),
1374         SD_BUS_PROPERTY("OperatingSystemCPEName", "s", property_get_os_release_field, offsetof(Context, data) + sizeof(char*) * PROP_OS_CPE_NAME, SD_BUS_VTABLE_PROPERTY_CONST),
1375         SD_BUS_PROPERTY("HomeURL", "s", property_get_os_release_field, offsetof(Context, data) + sizeof(char*) * PROP_OS_HOME_URL, SD_BUS_VTABLE_PROPERTY_CONST),
1376         SD_BUS_PROPERTY("HardwareVendor", "s", property_get_hardware_vendor, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1377         SD_BUS_PROPERTY("HardwareModel", "s", property_get_hardware_model, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1378         SD_BUS_PROPERTY("FirmwareVersion", "s", property_get_firmware_version, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1379         SD_BUS_PROPERTY("FirmwareVendor", "s", property_get_firmware_vendor, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1380         SD_BUS_PROPERTY("FirmwareDate", "t", property_get_firmware_date, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1381
1382         SD_BUS_METHOD_WITH_ARGS("SetHostname",
1383                                 SD_BUS_ARGS("s", hostname, "b", interactive),
1384                                 SD_BUS_NO_RESULT,
1385                                 method_set_hostname,
1386                                 SD_BUS_VTABLE_UNPRIVILEGED),
1387         SD_BUS_METHOD_WITH_ARGS("SetStaticHostname",
1388                                 SD_BUS_ARGS("s", hostname, "b", interactive),
1389                                 SD_BUS_NO_RESULT,
1390                                 method_set_static_hostname,
1391                                 SD_BUS_VTABLE_UNPRIVILEGED),
1392         SD_BUS_METHOD_WITH_ARGS("SetPrettyHostname",
1393                                 SD_BUS_ARGS("s", hostname, "b", interactive),
1394                                 SD_BUS_NO_RESULT,
1395                                 method_set_pretty_hostname,
1396                                 SD_BUS_VTABLE_UNPRIVILEGED),
1397         SD_BUS_METHOD_WITH_ARGS("SetIconName",
1398                                 SD_BUS_ARGS("s", icon, "b", interactive),
1399                                 SD_BUS_NO_RESULT,
1400                                 method_set_icon_name,
1401                                 SD_BUS_VTABLE_UNPRIVILEGED),
1402         SD_BUS_METHOD_WITH_ARGS("SetChassis",
1403                                 SD_BUS_ARGS("s", chassis, "b", interactive),
1404                                 SD_BUS_NO_RESULT,
1405                                 method_set_chassis,
1406                                 SD_BUS_VTABLE_UNPRIVILEGED),
1407         SD_BUS_METHOD_WITH_ARGS("SetDeployment",
1408                                 SD_BUS_ARGS("s", deployment, "b", interactive),
1409                                 SD_BUS_NO_RESULT,
1410                                 method_set_deployment,
1411                                 SD_BUS_VTABLE_UNPRIVILEGED),
1412         SD_BUS_METHOD_WITH_ARGS("SetLocation",
1413                                 SD_BUS_ARGS("s", location, "b", interactive),
1414                                 SD_BUS_NO_RESULT,
1415                                 method_set_location,
1416                                 SD_BUS_VTABLE_UNPRIVILEGED),
1417         SD_BUS_METHOD_WITH_ARGS("GetProductUUID",
1418                                 SD_BUS_ARGS("b", interactive),
1419                                 SD_BUS_RESULT("ay", uuid),
1420                                 method_get_product_uuid,
1421                                 SD_BUS_VTABLE_UNPRIVILEGED),
1422         SD_BUS_METHOD_WITH_ARGS("GetHardwareSerial",
1423                                 SD_BUS_NO_ARGS,
1424                                 SD_BUS_RESULT("s", serial),
1425                                 method_get_hardware_serial,
1426                                 SD_BUS_VTABLE_UNPRIVILEGED),
1427         SD_BUS_METHOD_WITH_ARGS("Describe",
1428                                 SD_BUS_NO_ARGS,
1429                                 SD_BUS_RESULT("s", json),
1430                                 method_describe,
1431                                 SD_BUS_VTABLE_UNPRIVILEGED),
1432
1433         SD_BUS_VTABLE_END,
1434 };
1435
1436 static const BusObjectImplementation manager_object = {
1437         "/org/freedesktop/hostname1",
1438         "org.freedesktop.hostname1",
1439         .vtables = BUS_VTABLES(hostname_vtable),
1440 };
1441
1442 static int connect_bus(Context *c, sd_event *event, sd_bus **ret) {
1443         _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
1444         int r;
1445
1446         assert(c);
1447         assert(event);
1448         assert(ret);
1449
1450         r = sd_bus_default_system(&bus);
1451         if (r < 0)
1452                 return log_error_errno(r, "Failed to get system bus connection: %m");
1453
1454         r = bus_add_implementation(bus, &manager_object, c);
1455         if (r < 0)
1456                 return r;
1457
1458         r = bus_log_control_api_register(bus);
1459         if (r < 0)
1460                 return r;
1461
1462         r = sd_bus_request_name_async(bus, NULL, "org.freedesktop.hostname1", 0, NULL, NULL);
1463         if (r < 0)
1464                 return log_error_errno(r, "Failed to request name: %m");
1465
1466         r = sd_bus_attach_event(bus, event, 0);
1467         if (r < 0)
1468                 return log_error_errno(r, "Failed to attach bus to event loop: %m");
1469
1470         *ret = TAKE_PTR(bus);
1471         return 0;
1472 }
1473
1474 static int run(int argc, char *argv[]) {
1475         _cleanup_(context_destroy) Context context = {
1476                 .hostname_source = _HOSTNAME_INVALID, /* appropriate value will be set later */
1477         };
1478         _cleanup_(sd_event_unrefp) sd_event *event = NULL;
1479         _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
1480         int r;
1481
1482         log_setup();
1483
1484         r = service_parse_argv("systemd-hostnamed.service",
1485                                "Manage the system hostname and related metadata.",
1486                                BUS_IMPLEMENTATIONS(&manager_object,
1487                                                    &log_control_object),
1488                                argc, argv);
1489         if (r <= 0)
1490                 return r;
1491
1492         umask(0022);
1493
1494         r = mac_selinux_init();
1495         if (r < 0)
1496                 return r;
1497
1498         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
1499
1500         r = sd_event_default(&event);
1501         if (r < 0)
1502                 return log_error_errno(r, "Failed to allocate event loop: %m");
1503
1504         (void) sd_event_set_watchdog(event, true);
1505
1506         r = sd_event_add_signal(event, NULL, SIGINT, NULL, NULL);
1507         if (r < 0)
1508                 return log_error_errno(r, "Failed to install SIGINT handler: %m");
1509
1510         r = sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL);
1511         if (r < 0)
1512                 return log_error_errno(r, "Failed to install SIGTERM handler: %m");
1513
1514         r = connect_bus(&context, event, &bus);
1515         if (r < 0)
1516                 return r;
1517
1518         r = bus_event_loop_with_idle(event, bus, "org.freedesktop.hostname1", DEFAULT_EXIT_USEC, NULL, NULL);
1519         if (r < 0)
1520                 return log_error_errno(r, "Failed to run event loop: %m");
1521
1522         return 0;
1523 }
1524
1525 DEFINE_MAIN_FUNCTION(run);