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_OS_SUPPORT_END,
  63         _PROP_MAX,
  64         _PROP_INVALID = -EINVAL,
  65 } HostProperty;
  66
  67 typedef struct Context {
  68         char *data[_PROP_MAX];
  69
  70         HostnameSource hostname_source;
  71
  72         struct stat etc_hostname_stat;
  73         struct stat etc_os_release_stat;
  74         struct stat etc_machine_info_stat;
  75
  76         Hashmap *polkit_registry;
  77 } Context;
  78
  79 static void context_reset(Context *c, uint64_t mask) {
  80         assert(c);
  81
  82         for (int p = 0; p < _PROP_MAX; p++) {
  83                 if (!FLAGS_SET(mask, UINT64_C(1) << p))
  84                         continue;
  85
  86                 c->data[p] = mfree(c->data[p]);
  87         }
  88 }
  89
  90 static void context_destroy(Context *c) {
  91         assert(c);
  92
  93         context_reset(c, UINT64_MAX);
  94         bus_verify_polkit_async_registry_free(c->polkit_registry);
  95 }
  96
  97 static void context_read_etc_hostname(Context *c) {
  98         struct stat current_stat = {};
  99         int r;
 100
 101         assert(c);
 102
 103         if (stat("/etc/hostname", &current_stat) >= 0 &&
 104             stat_inode_unmodified(&c->etc_hostname_stat, &current_stat))
 105                 return;
 106
 107         context_reset(c, UINT64_C(1) << PROP_STATIC_HOSTNAME);
 108
 109         r = read_etc_hostname(NULL, &c->data[PROP_STATIC_HOSTNAME]);
 110         if (r < 0 && r != -ENOENT)
 111                 log_warning_errno(r, "Failed to read /etc/hostname, ignoring: %m");
 112
 113         c->etc_hostname_stat = current_stat;
 114 }
 115
 116 static void context_read_machine_info(Context *c) {
 117         struct stat current_stat = {};
 118         int r;
 119
 120         assert(c);
 121
 122         if (stat("/etc/machine-info", &current_stat) >= 0 &&
 123             stat_inode_unmodified(&c->etc_machine_info_stat, &current_stat))
 124                 return;
 125
 126         context_reset(c,
 127                       (UINT64_C(1) << PROP_PRETTY_HOSTNAME) |
 128                       (UINT64_C(1) << PROP_ICON_NAME) |
 129                       (UINT64_C(1) << PROP_CHASSIS) |
 130                       (UINT64_C(1) << PROP_DEPLOYMENT) |
 131                       (UINT64_C(1) << PROP_LOCATION) |
 132                       (UINT64_C(1) << PROP_HARDWARE_VENDOR) |
 133                       (UINT64_C(1) << PROP_HARDWARE_MODEL));
 134
 135         r = parse_env_file(NULL, "/etc/machine-info",
 136                            "PRETTY_HOSTNAME", &c->data[PROP_PRETTY_HOSTNAME],
 137                            "ICON_NAME", &c->data[PROP_ICON_NAME],
 138                            "CHASSIS", &c->data[PROP_CHASSIS],
 139                            "DEPLOYMENT", &c->data[PROP_DEPLOYMENT],
 140                            "LOCATION", &c->data[PROP_LOCATION],
 141                            "HARDWARE_VENDOR", &c->data[PROP_HARDWARE_VENDOR],
 142                            "HARDWARE_MODEL", &c->data[PROP_HARDWARE_MODEL]);
 143         if (r < 0 && r != -ENOENT)
 144                 log_warning_errno(r, "Failed to read /etc/machine-info, ignoring: %m");
 145
 146         c->etc_machine_info_stat = current_stat;
 147 }
 148
 149 static void context_read_os_release(Context *c) {
 150         _cleanup_free_ char *os_name = NULL, *os_pretty_name = NULL;
 151         struct stat current_stat = {};
 152         int r;
 153
 154         assert(c);
 155
 156         if ((stat("/etc/os-release", &current_stat) >= 0 ||
 157              stat("/usr/lib/os-release", &current_stat) >= 0) &&
 158             stat_inode_unmodified(&c->etc_os_release_stat, &current_stat))
 159                 return;
 160
 161         context_reset(c,
 162                       (UINT64_C(1) << PROP_OS_PRETTY_NAME) |
 163                       (UINT64_C(1) << PROP_OS_CPE_NAME) |
 164                       (UINT64_C(1) << PROP_OS_HOME_URL) |
 165                       (UINT64_C(1) << PROP_OS_SUPPORT_END));
 166
 167         r = parse_os_release(NULL,
 168                              "PRETTY_NAME", &os_pretty_name,
 169                              "NAME",        &os_name,
 170                              "CPE_NAME",    &c->data[PROP_OS_CPE_NAME],
 171                              "HOME_URL",    &c->data[PROP_OS_HOME_URL],
 172                              "SUPPORT_END", &c->data[PROP_OS_SUPPORT_END]);
 173         if (r < 0 && r != -ENOENT)
 174                 log_warning_errno(r, "Failed to read os-release file, ignoring: %m");
 175
 176         if (free_and_strdup(&c->data[PROP_OS_PRETTY_NAME], os_release_pretty_name(os_pretty_name, os_name)) < 0)
 177                 log_oom();
 178
 179         c->etc_os_release_stat = current_stat;
 180 }
 181
 182 static int get_dmi_data(const char *database_key, const char *regular_key, char **ret) {
 183         _cleanup_(sd_device_unrefp) sd_device *device = NULL;
 184         _cleanup_free_ char *b = NULL;
 185         const char *s = NULL;
 186         int r;
 187
 188         r = sd_device_new_from_syspath(&device, "/sys/class/dmi/id");
 189         if (r < 0)
 190                 return log_debug_errno(r, "Failed to open /sys/class/dmi/id device, ignoring: %m");
 191
 192         if (database_key)
 193                 (void) sd_device_get_property_value(device, database_key, &s);
 194         if (!s && regular_key)
 195                 (void) sd_device_get_property_value(device, regular_key, &s);
 196
 197         if (!ret)
 198                 return !!s;
 199
 200         if (s) {
 201                 b = strdup(s);
 202                 if (!b)
 203                         return -ENOMEM;
 204         }
 205
 206         *ret = TAKE_PTR(b);
 207         return !!s;
 208 }
 209
 210 static int get_hardware_vendor(char **ret) {
 211         return get_dmi_data("ID_VENDOR_FROM_DATABASE", "ID_VENDOR", ret);
 212 }
 213
 214 static int get_hardware_model(char **ret) {
 215         return get_dmi_data("ID_MODEL_FROM_DATABASE", "ID_MODEL", ret);
 216 }
 217
 218 static int get_hardware_firmware_data(const char *sysattr, char **ret) {
 219         _cleanup_(sd_device_unrefp) sd_device *device = NULL;
 220         _cleanup_free_ char *b = NULL;
 221         const char *s = NULL;
 222         int r;
 223
 224         assert(sysattr);
 225
 226         r = sd_device_new_from_syspath(&device, "/sys/class/dmi/id");
 227         if (r < 0)
 228                 return log_debug_errno(r, "Failed to open /sys/class/dmi/id device, ignoring: %m");
 229
 230         (void) sd_device_get_sysattr_value(device, sysattr, &s);
 231         if (!isempty(s)) {
 232                 b = strdup(s);
 233                 if (!b)
 234                         return -ENOMEM;
 235         }
 236
 237         if (ret)
 238                 *ret = TAKE_PTR(b);
 239
 240         return !isempty(s);
 241 }
 242
 243 static int get_hardware_serial(char **ret) {
 244          int r;
 245
 246          r = get_hardware_firmware_data("product_serial", ret);
 247          if (r <= 0)
 248                 return get_hardware_firmware_data("board_serial", ret);
 249
 250          return r;
 251 }
 252
 253 static int get_firmware_version(char **ret) {
 254          return get_hardware_firmware_data("bios_version", ret);
 255 }
 256
 257 static int get_firmware_vendor(char **ret) {
 258          return get_hardware_firmware_data("bios_vendor", ret);
 259 }
 260
 261 static int get_firmware_date(usec_t *ret) {
 262          _cleanup_free_ char *bios_date = NULL, *month = NULL, *day = NULL, *year = NULL;
 263          int r;
 264
 265          assert(ret);
 266
 267          r = get_hardware_firmware_data("bios_date", &bios_date);
 268          if (r < 0)
 269                 return r;
 270          if (r == 0) {
 271                 *ret = USEC_INFINITY;
 272                 return 0;
 273          }
 274
 275          const char *p = bios_date;
 276          r = extract_many_words(&p, "/", EXTRACT_DONT_COALESCE_SEPARATORS, &month, &day, &year, NULL);
 277          if (r < 0)
 278                 return r;
 279          if (r != 3) /* less than three args read? */
 280                 return -EINVAL;
 281          if (!isempty(p)) /* more left in the string? */
 282                 return -EINVAL;
 283
 284          unsigned m, d, y;
 285          r = safe_atou(month, &m);
 286          if (r < 0)
 287                 return r;
 288          if (m < 1 || m > 12)
 289                 return -EINVAL;
 290          m -= 1;
 291
 292          r = safe_atou(day, &d);
 293          if (r < 0)
 294                 return r;
 295          if (d < 1 || d > 31)
 296                 return -EINVAL;
 297
 298          r = safe_atou(year, &y);
 299          if (r < 0)
 300                 return r;
 301          if (y < 1970 || y > (unsigned) INT_MAX)
 302                 return -EINVAL;
 303          y -= 1900;
 304
 305          struct tm tm = {
 306                 .tm_mday = d,
 307                 .tm_mon = m,
 308                 .tm_year = y,
 309          };
 310          time_t v = timegm(&tm);
 311          if (v == (time_t) -1)
 312                 return -errno;
 313          if (tm.tm_mday != (int) d || tm.tm_mon != (int) m || tm.tm_year != (int) y)
 314                 return -EINVAL; /* date was not normalized? (e.g. "30th of feb") */
 315
 316          *ret = (usec_t) v * USEC_PER_SEC;
 317
 318          return 0;
 319 }
 320
 321 static const char* valid_chassis(const char *chassis) {
 322         assert(chassis);
 323
 324         return nulstr_get(
 325                         "vm\0"
 326                         "container\0"
 327                         "desktop\0"
 328                         "laptop\0"
 329                         "convertible\0"
 330                         "server\0"
 331                         "tablet\0"
 332                         "handset\0"
 333                         "watch\0"
 334                         "embedded\0",
 335                         chassis);
 336 }
 337
 338 static bool valid_deployment(const char *deployment) {
 339         assert(deployment);
 340
 341         return in_charset(deployment, VALID_DEPLOYMENT_CHARS);
 342 }
 343
 344 static const char* fallback_chassis(void) {
 345         const char *chassis;
 346         _cleanup_free_ char *type = NULL;
 347         Virtualization v;
 348         unsigned t;
 349         int r;
 350
 351         v = detect_virtualization();
 352         if (v < 0)
 353                 log_debug_errno(v, "Failed to detect virtualization, ignoring: %m");
 354         else if (VIRTUALIZATION_IS_VM(v))
 355                 return "vm";
 356         else if (VIRTUALIZATION_IS_CONTAINER(v))
 357                 return "container";
 358
 359         r = read_one_line_file("/sys/class/dmi/id/chassis_type", &type);
 360         if (r < 0) {
 361                 log_debug_errno(r, "Failed to read DMI chassis type, ignoring: %m");
 362                 goto try_acpi;
 363         }
 364
 365         r = safe_atou(type, &t);
 366         if (r < 0) {
 367                 log_debug_errno(r, "Failed to parse DMI chassis type \"%s\", ignoring: %m", type);
 368                 goto try_acpi;
 369         }
 370
 371         /* We only list the really obvious cases here. The DMI data is unreliable enough, so let's not do any
 372          * additional guesswork on top of that.
 373          *
 374          * See the SMBIOS Specification 3.5.0 section 7.4.1 for details about the values listed here:
 375          *
 376          * https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.5.0.pdf
 377          */
 378
 379         switch (t) {
 380
 381         case 0x03: /* Desktop */
 382         case 0x04: /* Low Profile Desktop */
 383         case 0x06: /* Mini Tower */
 384         case 0x07: /* Tower */
 385         case 0x0D: /* All in one (i.e. PC built into monitor) */
 386         case 0x23: /* Mini PC */
 387         case 0x24: /* Stick PC */
 388                 return "desktop";
 389
 390         case 0x8: /* Portable */
 391         case 0x9: /* Laptop */
 392         case 0xA: /* Notebook */
 393         case 0xE: /* Sub Notebook */
 394                 return "laptop";
 395
 396         case 0xB: /* Hand Held */
 397                 return "handset";
 398
 399         case 0x11: /* Main Server Chassis */
 400         case 0x1C: /* Blade */
 401         case 0x1D: /* Blade Enclosure */
 402                 return "server";
 403
 404         case 0x1E: /* Tablet */
 405                 return "tablet";
 406
 407         case 0x1F: /* Convertible */
 408         case 0x20: /* Detachable */
 409                 return "convertible";
 410
 411         case 0x21: /* IoT Gateway */
 412         case 0x22: /* Embedded PC */
 413                 return "embedded";
 414
 415         default:
 416                 log_debug("Unhandled DMI chassis type 0x%02x, ignoring.", t);
 417         }
 418
 419 try_acpi:
 420         type = mfree(type);
 421         r = read_one_line_file("/sys/firmware/acpi/pm_profile", &type);
 422         if (r < 0) {
 423                 log_debug_errno(r, "Failed read ACPI PM profile, ignoring: %m");
 424                 goto try_devicetree;
 425         }
 426
 427         r = safe_atou(type, &t);
 428         if (r < 0) {
 429                 log_debug_errno(r, "Failed parse ACPI PM profile \"%s\", ignoring: %m", type);
 430                 goto try_devicetree;
 431         }
 432
 433         /* We only list the really obvious cases here as the ACPI data is not really super reliable.
 434          *
 435          * See the ACPI 5.0 Spec Section 5.2.9.1 for details:
 436          *
 437          * http://www.acpi.info/DOWNLOADS/ACPIspec50.pdf
 438          */
 439
 440         switch (t) {
 441
 442         case 1: /* Desktop */
 443         case 3: /* Workstation */
 444         case 6: /* Appliance PC */
 445                 return "desktop";
 446
 447         case 2: /* Mobile */
 448                 return "laptop";
 449
 450         case 4: /* Enterprise Server */
 451         case 5: /* SOHO Server */
 452         case 7: /* Performance Server */
 453                 return "server";
 454
 455         case 8: /* Tablet */
 456                 return "tablet";
 457
 458         default:
 459                 log_debug("Unhandled ACPI PM profile 0x%02x, ignoring.", t);
 460         }
 461
 462 try_devicetree:
 463         type = mfree(type);
 464         r = read_one_line_file("/proc/device-tree/chassis-type", &type);
 465         if (r < 0) {
 466                 log_debug_errno(r, "Failed to read device-tree chassis type, ignoring: %m");
 467                 return NULL;
 468         }
 469
 470         /* Note that the Devicetree specification uses the very same vocabulary
 471          * of chassis types as we do, hence we do not need to translate these types:
 472          *
 473          * https://github.com/devicetree-org/devicetree-specification/blob/master/source/chapter3-devicenodes.rst */
 474         chassis = valid_chassis(type);
 475         if (!chassis)
 476                 log_debug("Invalid device-tree chassis type \"%s\", ignoring.", type);
 477         return chassis;
 478 }
 479
 480 static char* context_get_chassis(Context *c) {
 481         const char *fallback;
 482         char *dmi;
 483
 484         assert(c);
 485
 486         if (!isempty(c->data[PROP_CHASSIS]))
 487                 return strdup(c->data[PROP_CHASSIS]);
 488
 489         if (get_dmi_data("ID_CHASSIS", NULL, &dmi) > 0)
 490                 return dmi;
 491
 492         fallback = fallback_chassis();
 493         if (fallback)
 494                 return strdup(fallback);
 495
 496         return NULL;
 497 }
 498
 499 static char* context_fallback_icon_name(Context *c) {
 500         _cleanup_free_ char *chassis = NULL;
 501
 502         assert(c);
 503
 504         chassis = context_get_chassis(c);
 505         if (chassis)
 506                 return strjoin("computer-", chassis);
 507
 508         return strdup("computer");
 509 }
 510
 511 static int context_update_kernel_hostname(
 512                 Context *c,
 513                 const char *transient_hn) {
 514
 515         _cleanup_free_ char *_hn_free = NULL;
 516         const char *hn;
 517         HostnameSource hns;
 518         int r;
 519
 520         assert(c);
 521
 522         /* /etc/hostname has the highest preference ... */
 523         if (c->data[PROP_STATIC_HOSTNAME]) {
 524                 hn = c->data[PROP_STATIC_HOSTNAME];
 525                 hns = HOSTNAME_STATIC;
 526
 527         /* ... the transient hostname, (ie: DHCP) comes next ... */
 528         } else if (transient_hn) {
 529                 hn = transient_hn;
 530                 hns = HOSTNAME_TRANSIENT;
 531
 532         /* ... and the ultimate fallback */
 533         } else {
 534                 hn = _hn_free = get_default_hostname();
 535                 if (!hn)
 536                         return log_oom();
 537
 538                 hns = HOSTNAME_DEFAULT;
 539         }
 540
 541         r = sethostname_idempotent(hn);
 542         if (r < 0)
 543                 return log_error_errno(r, "Failed to set hostname: %m");
 544
 545         if (c->hostname_source != hns) {
 546                 c->hostname_source = hns;
 547                 r = 1;
 548         }
 549
 550         (void) nscd_flush_cache(STRV_MAKE("hosts"));
 551
 552         if (r == 0)
 553                 log_debug("Hostname was already set to <%s>.", hn);
 554         else {
 555                 log_info("Hostname set to <%s> (%s)", hn, hostname_source_to_string(hns));
 556
 557                 hostname_update_source_hint(hn, hns);
 558         }
 559
 560         return r; /* 0 if no change, 1 if something was done  */
 561 }
 562
 563 static void unset_statp(struct stat **p) {
 564         if (!*p)
 565                 return;
 566
 567         **p = (struct stat) {};
 568 }
 569
 570 static int context_write_data_static_hostname(Context *c) {
 571         _cleanup_(unset_statp) struct stat *s = NULL;
 572         int r;
 573
 574         assert(c);
 575
 576         /* Make sure that if we fail here, we invalidate the cached information, since it was updated
 577          * already, even if we can't make it hit the disk. */
 578         s = &c->etc_hostname_stat;
 579
 580         if (isempty(c->data[PROP_STATIC_HOSTNAME])) {
 581                 if (unlink("/etc/hostname") < 0 && errno != ENOENT)
 582                         return -errno;
 583
 584                 TAKE_PTR(s);
 585                 return 0;
 586         }
 587
 588         r = write_string_file_atomic_label("/etc/hostname", c->data[PROP_STATIC_HOSTNAME]);
 589         if (r < 0)
 590                 return r;
 591
 592         TAKE_PTR(s);
 593         return 0;
 594 }
 595
 596 static int context_write_data_machine_info(Context *c) {
 597         _cleanup_(unset_statp) struct stat *s = NULL;
 598         static const char * const name[_PROP_MAX] = {
 599                 [PROP_PRETTY_HOSTNAME] = "PRETTY_HOSTNAME",
 600                 [PROP_ICON_NAME] = "ICON_NAME",
 601                 [PROP_CHASSIS] = "CHASSIS",
 602                 [PROP_DEPLOYMENT] = "DEPLOYMENT",
 603                 [PROP_LOCATION] = "LOCATION",
 604         };
 605         _cleanup_strv_free_ char **l = NULL;
 606         int r;
 607
 608         assert(c);
 609
 610         /* Make sure that if we fail here, we invalidate the cached information, since it was updated
 611          * already, even if we can't make it hit the disk. */
 612         s = &c->etc_machine_info_stat;
 613
 614         r = load_env_file(NULL, "/etc/machine-info", &l);
 615         if (r < 0 && r != -ENOENT)
 616                 return r;
 617
 618         for (int p = PROP_PRETTY_HOSTNAME; p <= PROP_LOCATION; p++) {
 619                 assert(name[p]);
 620
 621                 r = strv_env_assign(&l, name[p], empty_to_null(c->data[p]));
 622                 if (r < 0)
 623                         return r;
 624         }
 625
 626         if (strv_isempty(l)) {
 627                 if (unlink("/etc/machine-info") < 0 && errno != ENOENT)
 628                         return -errno;
 629
 630                 TAKE_PTR(s);
 631                 return 0;
 632         }
 633
 634         r = write_env_file_label("/etc/machine-info", l);
 635         if (r < 0)
 636                 return r;
 637
 638         TAKE_PTR(s);
 639         return 0;
 640 }
 641
 642 static int property_get_hardware_property(
 643                 sd_bus_message *reply,
 644                 Context *c,
 645                 HostProperty prop,
 646                 int (*getter)(char **)) {
 647
 648         _cleanup_free_ char *from_dmi = NULL;
 649
 650         assert(reply);
 651         assert(c);
 652         assert(IN_SET(prop, PROP_HARDWARE_VENDOR, PROP_HARDWARE_MODEL));
 653         assert(getter);
 654
 655         context_read_machine_info(c);
 656
 657         if (isempty(c->data[prop]))
 658                 (void) getter(&from_dmi);
 659
 660         return sd_bus_message_append(reply, "s", from_dmi ?: c->data[prop]);
 661 }
 662
 663 static int property_get_hardware_vendor(
 664                 sd_bus *bus,
 665                 const char *path,
 666                 const char *interface,
 667                 const char *property,
 668                 sd_bus_message *reply,
 669                 void *userdata,
 670                 sd_bus_error *error) {
 671
 672         return property_get_hardware_property(reply, userdata, PROP_HARDWARE_VENDOR, get_hardware_vendor);
 673 }
 674
 675 static int property_get_hardware_model(
 676                 sd_bus *bus,
 677                 const char *path,
 678                 const char *interface,
 679                 const char *property,
 680                 sd_bus_message *reply,
 681                 void *userdata,
 682                 sd_bus_error *error) {
 683
 684         return property_get_hardware_property(reply, userdata, PROP_HARDWARE_MODEL, get_hardware_model);
 685 }
 686
 687 static int property_get_firmware_version(
 688                 sd_bus *bus,
 689                 const char *path,
 690                 const char *interface,
 691                 const char *property,
 692                 sd_bus_message *reply,
 693                 void *userdata,
 694                 sd_bus_error *error) {
 695
 696         _cleanup_free_ char *firmware_version = NULL;
 697
 698         (void) get_firmware_version(&firmware_version);
 699
 700         return sd_bus_message_append(reply, "s", firmware_version);
 701 }
 702
 703 static int property_get_firmware_vendor(
 704                 sd_bus *bus,
 705                 const char *path,
 706                 const char *interface,
 707                 const char *property,
 708                 sd_bus_message *reply,
 709                 void *userdata,
 710                 sd_bus_error *error) {
 711
 712         _cleanup_free_ char *firmware_vendor = NULL;
 713
 714         (void) get_firmware_vendor(&firmware_vendor);
 715
 716         return sd_bus_message_append(reply, "s", firmware_vendor);
 717 }
 718
 719 static int property_get_firmware_date(
 720                 sd_bus *bus,
 721                 const char *path,
 722                 const char *interface,
 723                 const char *property,
 724                 sd_bus_message *reply,
 725                 void *userdata,
 726                 sd_bus_error *error) {
 727
 728         usec_t firmware_date = USEC_INFINITY;
 729
 730         (void) get_firmware_date(&firmware_date);
 731
 732         return sd_bus_message_append(reply, "t", firmware_date);
 733 }
 734 static int property_get_hostname(
 735                 sd_bus *bus,
 736                 const char *path,
 737                 const char *interface,
 738                 const char *property,
 739                 sd_bus_message *reply,
 740                 void *userdata,
 741                 sd_bus_error *error) {
 742
 743         _cleanup_free_ char *hn = NULL;
 744         int r;
 745
 746         r = gethostname_strict(&hn);
 747         if (r < 0) {
 748                 if (r != -ENXIO)
 749                         return r;
 750
 751                 hn = get_default_hostname();
 752                 if (!hn)
 753                         return -ENOMEM;
 754         }
 755
 756         return sd_bus_message_append(reply, "s", hn);
 757 }
 758
 759 static int property_get_static_hostname(
 760                 sd_bus *bus,
 761                 const char *path,
 762                 const char *interface,
 763                 const char *property,
 764                 sd_bus_message *reply,
 765                 void *userdata,
 766                 sd_bus_error *error) {
 767
 768         Context *c = ASSERT_PTR(userdata);
 769
 770         context_read_etc_hostname(c);
 771
 772         return sd_bus_message_append(reply, "s", c->data[PROP_STATIC_HOSTNAME]);
 773 }
 774
 775 static int property_get_default_hostname(
 776                 sd_bus *bus,
 777                 const char *path,
 778                 const char *interface,
 779                 const char *property,
 780                 sd_bus_message *reply,
 781                 void *userdata,
 782                 sd_bus_error *error) {
 783
 784         _cleanup_free_ char *hn = NULL;
 785
 786         hn = get_default_hostname();
 787         if (!hn)
 788                 return log_oom();
 789
 790         return sd_bus_message_append(reply, "s", hn);
 791 }
 792
 793 static void context_determine_hostname_source(Context *c) {
 794         _cleanup_free_ char *hostname = NULL;
 795         int r;
 796
 797         assert(c);
 798
 799         if (c->hostname_source >= 0)
 800                 return;
 801
 802         (void) gethostname_full(GET_HOSTNAME_ALLOW_LOCALHOST, &hostname);
 803
 804         if (streq_ptr(hostname, c->data[PROP_STATIC_HOSTNAME]))
 805                 c->hostname_source = HOSTNAME_STATIC;
 806         else {
 807                 _cleanup_free_ char *fallback = NULL;
 808
 809                 /* If the hostname was not set by us, try to figure out where it came from. If we set it to
 810                  * the default hostname, the file will tell us. We compare the string because it is possible
 811                  * that the hostname was set by an older version that had a different fallback, in the initrd
 812                  * or before we reexecuted. */
 813
 814                 r = read_one_line_file("/run/systemd/default-hostname", &fallback);
 815                 if (r < 0 && r != -ENOENT)
 816                         log_warning_errno(r, "Failed to read /run/systemd/default-hostname, ignoring: %m");
 817
 818                 if (streq_ptr(fallback, hostname))
 819                         c->hostname_source = HOSTNAME_DEFAULT;
 820                 else
 821                         c->hostname_source = HOSTNAME_TRANSIENT;
 822         }
 823 }
 824
 825 static int property_get_hostname_source(
 826                 sd_bus *bus,
 827                 const char *path,
 828                 const char *interface,
 829                 const char *property,
 830                 sd_bus_message *reply,
 831                 void *userdata,
 832                 sd_bus_error *error) {
 833
 834         Context *c = ASSERT_PTR(userdata);
 835
 836         context_read_etc_hostname(c);
 837         context_determine_hostname_source(c);
 838
 839         return sd_bus_message_append(reply, "s", hostname_source_to_string(c->hostname_source));
 840 }
 841
 842 static int property_get_machine_info_field(
 843                 sd_bus *bus,
 844                 const char *path,
 845                 const char *interface,
 846                 const char *property,
 847                 sd_bus_message *reply,
 848                 void *userdata,
 849                 sd_bus_error *error) {
 850
 851         sd_bus_slot *slot;
 852         Context *c;
 853
 854         /* Acquire the context object without this property's userdata offset added. Explanation: we want
 855          * access to two pointers here: a) the main context object we cache all properties in, and b) the
 856          * pointer to the property field inside the context object that we are supposed to update and
 857          * use. The latter (b) we get in the 'userdata' function parameter, and sd-bus calculates that for us
 858          * from the 'userdata' pointer we supplied when the vtable was registered, with the offset we
 859          * specified in the vtable added on top. To get the former (a) we need the 'userdata' pointer from
 860          * the vtable registration directly, without the offset added. Hence we ask sd-bus what the slot
 861          * object is (which encapsulates the vtable registration), and then query the 'userdata' field
 862          * directly off it. */
 863         assert_se(slot = sd_bus_get_current_slot(bus));
 864         assert_se(c = sd_bus_slot_get_userdata(slot));
 865
 866         context_read_machine_info(c);
 867
 868         return sd_bus_message_append(reply, "s", *(char**) userdata);
 869 }
 870
 871 static int property_get_os_release_field(
 872                 sd_bus *bus,
 873                 const char *path,
 874                 const char *interface,
 875                 const char *property,
 876                 sd_bus_message *reply,
 877                 void *userdata,
 878                 sd_bus_error *error) {
 879
 880         sd_bus_slot *slot;
 881         Context *c;
 882
 883         /* As above, acquire the current context without this property's userdata offset added. */
 884         assert_se(slot = sd_bus_get_current_slot(bus));
 885         assert_se(c = sd_bus_slot_get_userdata(slot));
 886
 887         context_read_os_release(c);
 888
 889         return sd_bus_message_append(reply, "s", *(char**) userdata);
 890 }
 891
 892 static int property_get_os_support_end(
 893                 sd_bus *bus,
 894                 const char *path,
 895                 const char *interface,
 896                 const char *property,
 897                 sd_bus_message *reply,
 898                 void *userdata,
 899                 sd_bus_error *error) {
 900
 901         Context *c = userdata;
 902         usec_t eol = USEC_INFINITY;
 903
 904         context_read_os_release(c);
 905
 906         if (c->data[PROP_OS_SUPPORT_END])
 907                 (void) os_release_support_ended(c->data[PROP_OS_SUPPORT_END], /* quiet= */ false, &eol);
 908
 909         return sd_bus_message_append(reply, "t", eol);
 910 }
 911
 912 static int property_get_icon_name(
 913                 sd_bus *bus,
 914                 const char *path,
 915                 const char *interface,
 916                 const char *property,
 917                 sd_bus_message *reply,
 918                 void *userdata,
 919                 sd_bus_error *error) {
 920
 921         _cleanup_free_ char *n = NULL;
 922         Context *c = userdata;
 923         const char *name;
 924
 925         context_read_machine_info(c);
 926
 927         if (isempty(c->data[PROP_ICON_NAME]))
 928                 name = n = context_fallback_icon_name(c);
 929         else
 930                 name = c->data[PROP_ICON_NAME];
 931
 932         if (!name)
 933                 return -ENOMEM;
 934
 935         return sd_bus_message_append(reply, "s", name);
 936 }
 937
 938 static int property_get_chassis(
 939                 sd_bus *bus,
 940                 const char *path,
 941                 const char *interface,
 942                 const char *property,
 943                 sd_bus_message *reply,
 944                 void *userdata,
 945                 sd_bus_error *error) {
 946
 947         _cleanup_free_ char *chassis = NULL;
 948         Context *c = userdata;
 949
 950         context_read_machine_info(c);
 951
 952         chassis = context_get_chassis(c);
 953
 954         return sd_bus_message_append(reply, "s", chassis);
 955 }
 956
 957 static int property_get_uname_field(
 958                 sd_bus *bus,
 959                 const char *path,
 960                 const char *interface,
 961                 const char *property,
 962                 sd_bus_message *reply,
 963                 void *userdata,
 964                 sd_bus_error *error) {
 965
 966         struct utsname u;
 967
 968         assert_se(uname(&u) >= 0);
 969
 970         return sd_bus_message_append(reply, "s", (char*) &u + PTR_TO_SIZE(userdata));
 971 }
 972
 973 static int method_set_hostname(sd_bus_message *m, void *userdata, sd_bus_error *error) {
 974         Context *c = ASSERT_PTR(userdata);
 975         const char *name;
 976         int interactive, r;
 977
 978         assert(m);
 979
 980         r = sd_bus_message_read(m, "sb", &name, &interactive);
 981         if (r < 0)
 982                 return r;
 983
 984         name = empty_to_null(name);
 985
 986         /* We always go through with the procedure below without comparing to the current hostname, because
 987          * we might want to adjust hostname source information even if the actual hostname is unchanged. */
 988
 989         if (name && !hostname_is_valid(name, 0))
 990                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid hostname '%s'", name);
 991
 992         context_read_etc_hostname(c);
 993
 994         r = bus_verify_polkit_async(
 995                         m,
 996                         CAP_SYS_ADMIN,
 997                         "org.freedesktop.hostname1.set-hostname",
 998                         NULL,
 999                         interactive,
1000                         UID_INVALID,
1001                         &c->polkit_registry,
1002                         error);
1003         if (r < 0)
1004                 return r;
1005         if (r == 0)
1006                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1007
1008         r = context_update_kernel_hostname(c, name);
1009         if (r < 0)
1010                 return sd_bus_error_set_errnof(error, r, "Failed to set hostname: %m");
1011         else if (r > 0)
1012                 (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m),
1013                                                       "/org/freedesktop/hostname1", "org.freedesktop.hostname1",
1014                                                       "Hostname", "HostnameSource", NULL);
1015
1016         return sd_bus_reply_method_return(m, NULL);
1017 }
1018
1019 static int method_set_static_hostname(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1020         Context *c = ASSERT_PTR(userdata);
1021         const char *name;
1022         int interactive;
1023         int r;
1024
1025         assert(m);
1026
1027         r = sd_bus_message_read(m, "sb", &name, &interactive);
1028         if (r < 0)
1029                 return r;
1030
1031         name = empty_to_null(name);
1032
1033         context_read_etc_hostname(c);
1034
1035         if (streq_ptr(name, c->data[PROP_STATIC_HOSTNAME]))
1036                 return sd_bus_reply_method_return(m, NULL);
1037
1038         if (name && !hostname_is_valid(name, 0))
1039                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid static hostname '%s'", name);
1040
1041         r = bus_verify_polkit_async(
1042                         m,
1043                         CAP_SYS_ADMIN,
1044                         "org.freedesktop.hostname1.set-static-hostname",
1045                         NULL,
1046                         interactive,
1047                         UID_INVALID,
1048                         &c->polkit_registry,
1049                         error);
1050         if (r < 0)
1051                 return r;
1052         if (r == 0)
1053                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1054
1055         r = free_and_strdup_warn(&c->data[PROP_STATIC_HOSTNAME], name);
1056         if (r < 0)
1057                 return r;
1058
1059         r = context_write_data_static_hostname(c);
1060         if (r < 0) {
1061                 log_error_errno(r, "Failed to write static hostname: %m");
1062                 if (ERRNO_IS_PRIVILEGE(r))
1063                         return sd_bus_error_set(error, BUS_ERROR_FILE_IS_PROTECTED, "Not allowed to update /etc/hostname.");
1064                 if (r == -EROFS)
1065                         return sd_bus_error_set(error, BUS_ERROR_READ_ONLY_FILESYSTEM, "/etc/hostname is in a read-only filesystem.");
1066                 return sd_bus_error_set_errnof(error, r, "Failed to set static hostname: %m");
1067         }
1068
1069         r = context_update_kernel_hostname(c, NULL);
1070         if (r < 0) {
1071                 log_error_errno(r, "Failed to set hostname: %m");
1072                 return sd_bus_error_set_errnof(error, r, "Failed to set hostname: %m");
1073         }
1074
1075         (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m),
1076                                               "/org/freedesktop/hostname1", "org.freedesktop.hostname1",
1077                                               "StaticHostname", "Hostname", "HostnameSource", NULL);
1078
1079         return sd_bus_reply_method_return(m, NULL);
1080 }
1081
1082 static int set_machine_info(Context *c, sd_bus_message *m, int prop, sd_bus_message_handler_t cb, sd_bus_error *error) {
1083         int interactive;
1084         const char *name;
1085         int r;
1086
1087         assert(c);
1088         assert(m);
1089
1090         r = sd_bus_message_read(m, "sb", &name, &interactive);
1091         if (r < 0)
1092                 return r;
1093
1094         name = empty_to_null(name);
1095
1096         context_read_machine_info(c);
1097
1098         if (streq_ptr(name, c->data[prop]))
1099                 return sd_bus_reply_method_return(m, NULL);
1100
1101         if (!isempty(name)) {
1102                 /* The icon name might ultimately be used as file
1103                  * name, so better be safe than sorry */
1104
1105                 if (prop == PROP_ICON_NAME && !filename_is_valid(name))
1106                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid icon name '%s'", name);
1107                 if (prop == PROP_PRETTY_HOSTNAME && string_has_cc(name, NULL))
1108                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid pretty hostname '%s'", name);
1109                 if (prop == PROP_CHASSIS && !valid_chassis(name))
1110                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid chassis '%s'", name);
1111                 if (prop == PROP_DEPLOYMENT && !valid_deployment(name))
1112                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid deployment '%s'", name);
1113                 if (prop == PROP_LOCATION && string_has_cc(name, NULL))
1114                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid location '%s'", name);
1115         }
1116
1117         /* Since the pretty hostname should always be changed at the
1118          * same time as the static one, use the same policy action for
1119          * both... */
1120
1121         r = bus_verify_polkit_async(
1122                         m,
1123                         CAP_SYS_ADMIN,
1124                         prop == PROP_PRETTY_HOSTNAME ? "org.freedesktop.hostname1.set-static-hostname" : "org.freedesktop.hostname1.set-machine-info",
1125                         NULL,
1126                         interactive,
1127                         UID_INVALID,
1128                         &c->polkit_registry,
1129                         error);
1130         if (r < 0)
1131                 return r;
1132         if (r == 0)
1133                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1134
1135         r = free_and_strdup_warn(&c->data[prop], name);
1136         if (r < 0)
1137                 return r;
1138
1139         r = context_write_data_machine_info(c);
1140         if (r < 0) {
1141                 log_error_errno(r, "Failed to write machine info: %m");
1142                 if (ERRNO_IS_PRIVILEGE(r))
1143                         return sd_bus_error_set(error, BUS_ERROR_FILE_IS_PROTECTED, "Not allowed to update /etc/machine-info.");
1144                 if (r == -EROFS)
1145                         return sd_bus_error_set(error, BUS_ERROR_READ_ONLY_FILESYSTEM, "/etc/machine-info is in a read-only filesystem.");
1146                 return sd_bus_error_set_errnof(error, r, "Failed to write machine info: %m");
1147         }
1148
1149         log_info("Changed %s to '%s'",
1150                  prop == PROP_PRETTY_HOSTNAME ? "pretty hostname" :
1151                  prop == PROP_DEPLOYMENT ? "deployment" :
1152                  prop == PROP_LOCATION ? "location" :
1153                  prop == PROP_CHASSIS ? "chassis" : "icon name", strna(c->data[prop]));
1154
1155         (void) sd_bus_emit_properties_changed(
1156                         sd_bus_message_get_bus(m),
1157                         "/org/freedesktop/hostname1",
1158                         "org.freedesktop.hostname1",
1159                         prop == PROP_PRETTY_HOSTNAME ? "PrettyHostname" :
1160                         prop == PROP_DEPLOYMENT ? "Deployment" :
1161                         prop == PROP_LOCATION ? "Location" :
1162                         prop == PROP_CHASSIS ? "Chassis" : "IconName" , NULL);
1163
1164         return sd_bus_reply_method_return(m, NULL);
1165 }
1166
1167 static int method_set_pretty_hostname(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1168         return set_machine_info(userdata, m, PROP_PRETTY_HOSTNAME, method_set_pretty_hostname, error);
1169 }
1170
1171 static int method_set_icon_name(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1172         return set_machine_info(userdata, m, PROP_ICON_NAME, method_set_icon_name, error);
1173 }
1174
1175 static int method_set_chassis(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1176         return set_machine_info(userdata, m, PROP_CHASSIS, method_set_chassis, error);
1177 }
1178
1179 static int method_set_deployment(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1180         return set_machine_info(userdata, m, PROP_DEPLOYMENT, method_set_deployment, error);
1181 }
1182
1183 static int method_set_location(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1184         return set_machine_info(userdata, m, PROP_LOCATION, method_set_location, error);
1185 }
1186
1187 static int method_get_product_uuid(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1188         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1189         Context *c = ASSERT_PTR(userdata);
1190         int interactive, r;
1191         sd_id128_t uuid;
1192
1193         assert(m);
1194
1195         r = sd_bus_message_read(m, "b", &interactive);
1196         if (r < 0)
1197                 return r;
1198
1199         r = bus_verify_polkit_async(
1200                         m,
1201                         CAP_SYS_ADMIN,
1202                         "org.freedesktop.hostname1.get-product-uuid",
1203                         NULL,
1204                         interactive,
1205                         UID_INVALID,
1206                         &c->polkit_registry,
1207                         error);
1208         if (r < 0)
1209                 return r;
1210         if (r == 0)
1211                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1212
1213         r = id128_get_product(&uuid);
1214         if (r < 0) {
1215                 if (r == -EADDRNOTAVAIL)
1216                         log_debug_errno(r, "DMI product UUID is all 0x00 or all 0xFF, ignoring.");
1217                 else
1218                         log_full_errno(r == -ENOENT ? LOG_DEBUG : LOG_WARNING, r,
1219                                        "Failed to read product UUID, ignoring: %m");
1220
1221                 return sd_bus_error_set(error, BUS_ERROR_NO_PRODUCT_UUID,
1222                                         "Failed to read product UUID from firmware.");
1223         }
1224
1225         r = sd_bus_message_new_method_return(m, &reply);
1226         if (r < 0)
1227                 return r;
1228
1229         r = sd_bus_message_append_array(reply, 'y', uuid.bytes, sizeof(uuid.bytes));
1230         if (r < 0)
1231                 return r;
1232
1233         return sd_bus_send(NULL, reply, NULL);
1234 }
1235
1236 static int method_get_hardware_serial(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1237         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1238         _cleanup_free_ char *serial = NULL;
1239         Context *c = ASSERT_PTR(userdata);
1240         int r;
1241
1242         assert(m);
1243
1244         r = bus_verify_polkit_async(
1245                         m,
1246                         CAP_SYS_ADMIN,
1247                         "org.freedesktop.hostname1.get-hardware-serial",
1248                         NULL,
1249                         false,
1250                         UID_INVALID,
1251                         &c->polkit_registry,
1252                         error);
1253         if (r < 0)
1254                 return r;
1255         if (r == 0)
1256                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1257
1258         r = get_hardware_serial(&serial);
1259         if (r < 0)
1260                 return r;
1261
1262         r = sd_bus_message_new_method_return(m, &reply);
1263         if (r < 0)
1264                 return r;
1265
1266         r = sd_bus_message_append(reply, "s", serial);
1267         if (r < 0)
1268                 return r;
1269
1270         return sd_bus_send(NULL, reply, NULL);
1271 }
1272
1273 static int method_describe(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1274         _cleanup_free_ char *hn = NULL, *dhn = NULL, *in = NULL, *text = NULL,
1275                 *chassis = NULL, *vendor = NULL, *model = NULL, *serial = NULL, *firmware_version = NULL,
1276                 *firmware_vendor = NULL;
1277         usec_t firmware_date = USEC_INFINITY, eol = USEC_INFINITY;
1278         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1279         _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
1280         sd_id128_t product_uuid = SD_ID128_NULL;
1281         Context *c = ASSERT_PTR(userdata);
1282         bool privileged;
1283         struct utsname u;
1284         int r;
1285
1286         assert(m);
1287
1288         r = bus_verify_polkit_async(
1289                         m,
1290                         CAP_SYS_ADMIN,
1291                         "org.freedesktop.hostname1.get-description",
1292                         NULL,
1293                         false,
1294                         UID_INVALID,
1295                         &c->polkit_registry,
1296                         NULL);
1297         if (r == 0)
1298                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1299
1300         /* We ignore all authentication errors here, since most data is unprivileged, the one exception being
1301          * the product ID which we'll check explicitly. */
1302         privileged = r > 0;
1303
1304         context_read_etc_hostname(c);
1305         context_read_machine_info(c);
1306         context_read_os_release(c);
1307         context_determine_hostname_source(c);
1308
1309         r = gethostname_strict(&hn);
1310         if (r < 0) {
1311                 if (r != -ENXIO)
1312                         return log_error_errno(r, "Failed to read local host name: %m");
1313
1314                 hn = get_default_hostname();
1315                 if (!hn)
1316                         return log_oom();
1317         }
1318
1319         dhn = get_default_hostname();
1320         if (!dhn)
1321                 return log_oom();
1322
1323         if (isempty(c->data[PROP_ICON_NAME]))
1324                 in = context_fallback_icon_name(c);
1325
1326         chassis = context_get_chassis(c);
1327
1328         assert_se(uname(&u) >= 0);
1329
1330         if (isempty(c->data[PROP_HARDWARE_VENDOR]))
1331                 (void) get_hardware_vendor(&vendor);
1332         if (isempty(c->data[PROP_HARDWARE_MODEL]))
1333                 (void) get_hardware_model(&model);
1334
1335         if (privileged) {
1336                 /* The product UUID and hardware serial is only available to privileged clients */
1337                 (void) id128_get_product(&product_uuid);
1338                 (void) get_hardware_serial(&serial);
1339         }
1340         (void) get_firmware_version(&firmware_version);
1341         (void) get_firmware_vendor(&firmware_vendor);
1342         (void) get_firmware_date(&firmware_date);
1343
1344         if (c->data[PROP_OS_SUPPORT_END])
1345                 (void) os_release_support_ended(c->data[PROP_OS_SUPPORT_END], /* quiet= */ false, &eol);
1346
1347         r = json_build(&v, JSON_BUILD_OBJECT(
1348                                        JSON_BUILD_PAIR("Hostname", JSON_BUILD_STRING(hn)),
1349                                        JSON_BUILD_PAIR("StaticHostname", JSON_BUILD_STRING(c->data[PROP_STATIC_HOSTNAME])),
1350                                        JSON_BUILD_PAIR("PrettyHostname", JSON_BUILD_STRING(c->data[PROP_PRETTY_HOSTNAME])),
1351                                        JSON_BUILD_PAIR("DefaultHostname", JSON_BUILD_STRING(dhn)),
1352                                        JSON_BUILD_PAIR("HostnameSource", JSON_BUILD_STRING(hostname_source_to_string(c->hostname_source))),
1353                                        JSON_BUILD_PAIR("IconName", JSON_BUILD_STRING(in ?: c->data[PROP_ICON_NAME])),
1354                                        JSON_BUILD_PAIR("Chassis", JSON_BUILD_STRING(chassis)),
1355                                        JSON_BUILD_PAIR("Deployment", JSON_BUILD_STRING(c->data[PROP_DEPLOYMENT])),
1356                                        JSON_BUILD_PAIR("Location", JSON_BUILD_STRING(c->data[PROP_LOCATION])),
1357                                        JSON_BUILD_PAIR("KernelName", JSON_BUILD_STRING(u.sysname)),
1358                                        JSON_BUILD_PAIR("KernelRelease", JSON_BUILD_STRING(u.release)),
1359                                        JSON_BUILD_PAIR("KernelVersion", JSON_BUILD_STRING(u.version)),
1360                                        JSON_BUILD_PAIR("OperatingSystemPrettyName", JSON_BUILD_STRING(c->data[PROP_OS_PRETTY_NAME])),
1361                                        JSON_BUILD_PAIR("OperatingSystemCPEName", JSON_BUILD_STRING(c->data[PROP_OS_CPE_NAME])),
1362                                        JSON_BUILD_PAIR("OperatingSystemHomeURL", JSON_BUILD_STRING(c->data[PROP_OS_HOME_URL])),
1363                                        JSON_BUILD_PAIR_FINITE_USEC("OperatingSystemSupportEnd", eol),
1364                                        JSON_BUILD_PAIR("HardwareVendor", JSON_BUILD_STRING(vendor ?: c->data[PROP_HARDWARE_VENDOR])),
1365                                        JSON_BUILD_PAIR("HardwareModel", JSON_BUILD_STRING(model ?: c->data[PROP_HARDWARE_MODEL])),
1366                                        JSON_BUILD_PAIR("HardwareSerial", JSON_BUILD_STRING(serial)),
1367                                        JSON_BUILD_PAIR("FirmwareVersion", JSON_BUILD_STRING(firmware_version)),
1368                                        JSON_BUILD_PAIR("FirmwareVendor", JSON_BUILD_STRING(firmware_vendor)),
1369                                        JSON_BUILD_PAIR_FINITE_USEC("FirmwareDate", firmware_date),
1370                                        JSON_BUILD_PAIR_CONDITION(!sd_id128_is_null(product_uuid), "ProductUUID", JSON_BUILD_ID128(product_uuid)),
1371                                        JSON_BUILD_PAIR_CONDITION(sd_id128_is_null(product_uuid), "ProductUUID", JSON_BUILD_NULL)));
1372
1373         if (r < 0)
1374                 return log_error_errno(r, "Failed to build JSON data: %m");
1375
1376         r = json_variant_format(v, 0, &text);
1377         if (r < 0)
1378                 return log_error_errno(r, "Failed to format JSON data: %m");
1379
1380         r = sd_bus_message_new_method_return(m, &reply);
1381         if (r < 0)
1382                 return r;
1383
1384         r = sd_bus_message_append(reply, "s", text);
1385         if (r < 0)
1386                 return r;
1387
1388         return sd_bus_send(NULL, reply, NULL);
1389 }
1390
1391 static const sd_bus_vtable hostname_vtable[] = {
1392         SD_BUS_VTABLE_START(0),
1393         SD_BUS_PROPERTY("Hostname", "s", property_get_hostname, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1394         SD_BUS_PROPERTY("StaticHostname", "s", property_get_static_hostname, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1395         SD_BUS_PROPERTY("PrettyHostname", "s", property_get_machine_info_field, offsetof(Context, data) + sizeof(char*) * PROP_PRETTY_HOSTNAME, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1396         SD_BUS_PROPERTY("DefaultHostname", "s", property_get_default_hostname, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1397         SD_BUS_PROPERTY("HostnameSource", "s", property_get_hostname_source, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1398         SD_BUS_PROPERTY("IconName", "s", property_get_icon_name, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1399         SD_BUS_PROPERTY("Chassis", "s", property_get_chassis, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1400         SD_BUS_PROPERTY("Deployment", "s", property_get_machine_info_field, offsetof(Context, data) + sizeof(char*) * PROP_DEPLOYMENT, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1401         SD_BUS_PROPERTY("Location", "s", property_get_machine_info_field, offsetof(Context, data) + sizeof(char*) * PROP_LOCATION, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1402         SD_BUS_PROPERTY("KernelName", "s", property_get_uname_field, offsetof(struct utsname, sysname), SD_BUS_VTABLE_ABSOLUTE_OFFSET|SD_BUS_VTABLE_PROPERTY_CONST),
1403         SD_BUS_PROPERTY("KernelRelease", "s", property_get_uname_field, offsetof(struct utsname, release), SD_BUS_VTABLE_ABSOLUTE_OFFSET|SD_BUS_VTABLE_PROPERTY_CONST),
1404         SD_BUS_PROPERTY("KernelVersion", "s", property_get_uname_field, offsetof(struct utsname, version), SD_BUS_VTABLE_ABSOLUTE_OFFSET|SD_BUS_VTABLE_PROPERTY_CONST),
1405         SD_BUS_PROPERTY("OperatingSystemPrettyName", "s", property_get_os_release_field, offsetof(Context, data) + sizeof(char*) * PROP_OS_PRETTY_NAME, SD_BUS_VTABLE_PROPERTY_CONST),
1406         SD_BUS_PROPERTY("OperatingSystemCPEName", "s", property_get_os_release_field, offsetof(Context, data) + sizeof(char*) * PROP_OS_CPE_NAME, SD_BUS_VTABLE_PROPERTY_CONST),
1407         SD_BUS_PROPERTY("OperatingSystemSupportEnd", "t", property_get_os_support_end, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1408         SD_BUS_PROPERTY("HomeURL", "s", property_get_os_release_field, offsetof(Context, data) + sizeof(char*) * PROP_OS_HOME_URL, SD_BUS_VTABLE_PROPERTY_CONST),
1409         SD_BUS_PROPERTY("HardwareVendor", "s", property_get_hardware_vendor, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1410         SD_BUS_PROPERTY("HardwareModel", "s", property_get_hardware_model, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1411         SD_BUS_PROPERTY("FirmwareVersion", "s", property_get_firmware_version, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1412         SD_BUS_PROPERTY("FirmwareVendor", "s", property_get_firmware_vendor, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1413         SD_BUS_PROPERTY("FirmwareDate", "t", property_get_firmware_date, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1414
1415         SD_BUS_METHOD_WITH_ARGS("SetHostname",
1416                                 SD_BUS_ARGS("s", hostname, "b", interactive),
1417                                 SD_BUS_NO_RESULT,
1418                                 method_set_hostname,
1419                                 SD_BUS_VTABLE_UNPRIVILEGED),
1420         SD_BUS_METHOD_WITH_ARGS("SetStaticHostname",
1421                                 SD_BUS_ARGS("s", hostname, "b", interactive),
1422                                 SD_BUS_NO_RESULT,
1423                                 method_set_static_hostname,
1424                                 SD_BUS_VTABLE_UNPRIVILEGED),
1425         SD_BUS_METHOD_WITH_ARGS("SetPrettyHostname",
1426                                 SD_BUS_ARGS("s", hostname, "b", interactive),
1427                                 SD_BUS_NO_RESULT,
1428                                 method_set_pretty_hostname,
1429                                 SD_BUS_VTABLE_UNPRIVILEGED),
1430         SD_BUS_METHOD_WITH_ARGS("SetIconName",
1431                                 SD_BUS_ARGS("s", icon, "b", interactive),
1432                                 SD_BUS_NO_RESULT,
1433                                 method_set_icon_name,
1434                                 SD_BUS_VTABLE_UNPRIVILEGED),
1435         SD_BUS_METHOD_WITH_ARGS("SetChassis",
1436                                 SD_BUS_ARGS("s", chassis, "b", interactive),
1437                                 SD_BUS_NO_RESULT,
1438                                 method_set_chassis,
1439                                 SD_BUS_VTABLE_UNPRIVILEGED),
1440         SD_BUS_METHOD_WITH_ARGS("SetDeployment",
1441                                 SD_BUS_ARGS("s", deployment, "b", interactive),
1442                                 SD_BUS_NO_RESULT,
1443                                 method_set_deployment,
1444                                 SD_BUS_VTABLE_UNPRIVILEGED),
1445         SD_BUS_METHOD_WITH_ARGS("SetLocation",
1446                                 SD_BUS_ARGS("s", location, "b", interactive),
1447                                 SD_BUS_NO_RESULT,
1448                                 method_set_location,
1449                                 SD_BUS_VTABLE_UNPRIVILEGED),
1450         SD_BUS_METHOD_WITH_ARGS("GetProductUUID",
1451                                 SD_BUS_ARGS("b", interactive),
1452                                 SD_BUS_RESULT("ay", uuid),
1453                                 method_get_product_uuid,
1454                                 SD_BUS_VTABLE_UNPRIVILEGED),
1455         SD_BUS_METHOD_WITH_ARGS("GetHardwareSerial",
1456                                 SD_BUS_NO_ARGS,
1457                                 SD_BUS_RESULT("s", serial),
1458                                 method_get_hardware_serial,
1459                                 SD_BUS_VTABLE_UNPRIVILEGED),
1460         SD_BUS_METHOD_WITH_ARGS("Describe",
1461                                 SD_BUS_NO_ARGS,
1462                                 SD_BUS_RESULT("s", json),
1463                                 method_describe,
1464                                 SD_BUS_VTABLE_UNPRIVILEGED),
1465
1466         SD_BUS_VTABLE_END,
1467 };
1468
1469 static const BusObjectImplementation manager_object = {
1470         "/org/freedesktop/hostname1",
1471         "org.freedesktop.hostname1",
1472         .vtables = BUS_VTABLES(hostname_vtable),
1473 };
1474
1475 static int connect_bus(Context *c, sd_event *event, sd_bus **ret) {
1476         _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
1477         int r;
1478
1479         assert(c);
1480         assert(event);
1481         assert(ret);
1482
1483         r = sd_bus_default_system(&bus);
1484         if (r < 0)
1485                 return log_error_errno(r, "Failed to get system bus connection: %m");
1486
1487         r = bus_add_implementation(bus, &manager_object, c);
1488         if (r < 0)
1489                 return r;
1490
1491         r = bus_log_control_api_register(bus);
1492         if (r < 0)
1493                 return r;
1494
1495         r = sd_bus_request_name_async(bus, NULL, "org.freedesktop.hostname1", 0, NULL, NULL);
1496         if (r < 0)
1497                 return log_error_errno(r, "Failed to request name: %m");
1498
1499         r = sd_bus_attach_event(bus, event, 0);
1500         if (r < 0)
1501                 return log_error_errno(r, "Failed to attach bus to event loop: %m");
1502
1503         *ret = TAKE_PTR(bus);
1504         return 0;
1505 }
1506
1507 static int run(int argc, char *argv[]) {
1508         _cleanup_(context_destroy) Context context = {
1509                 .hostname_source = _HOSTNAME_INVALID, /* appropriate value will be set later */
1510         };
1511         _cleanup_(sd_event_unrefp) sd_event *event = NULL;
1512         _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
1513         int r;
1514
1515         log_setup();
1516
1517         r = service_parse_argv("systemd-hostnamed.service",
1518                                "Manage the system hostname and related metadata.",
1519                                BUS_IMPLEMENTATIONS(&manager_object,
1520                                                    &log_control_object),
1521                                argc, argv);
1522         if (r <= 0)
1523                 return r;
1524
1525         umask(0022);
1526
1527         r = mac_init();
1528         if (r < 0)
1529                 return r;
1530
1531         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
1532
1533         r = sd_event_default(&event);
1534         if (r < 0)
1535                 return log_error_errno(r, "Failed to allocate event loop: %m");
1536
1537         (void) sd_event_set_watchdog(event, true);
1538
1539         r = sd_event_add_signal(event, NULL, SIGINT, NULL, NULL);
1540         if (r < 0)
1541                 return log_error_errno(r, "Failed to install SIGINT handler: %m");
1542
1543         r = sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL);
1544         if (r < 0)
1545                 return log_error_errno(r, "Failed to install SIGTERM handler: %m");
1546
1547         r = connect_bus(&context, event, &bus);
1548         if (r < 0)
1549                 return r;
1550
1551         r = bus_event_loop_with_idle(event, bus, "org.freedesktop.hostname1", DEFAULT_EXIT_USEC, NULL, NULL);
1552         if (r < 0)
1553                 return log_error_errno(r, "Failed to run event loop: %m");
1554
1555         return 0;
1556 }
1557
1558 DEFINE_MAIN_FUNCTION(run);