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 bool use_dmi_data(void) {
 183         int r;
 184
 185         r = getenv_bool("SYSTEMD_HOSTNAME_FORCE_DMI");
 186         if (r >= 0) {
 187                 log_debug("Honouring $SYSTEMD_HOSTNAME_FORCE_DMI override: %s", yes_no(r));
 188                 return r;
 189         }
 190         if (r != -ENXIO)
 191                 log_debug_errno(r, "Failed to parse $SYSTEMD_HOSTNAME_FORCE_DMI, ignoring: %m");
 192
 193         if (detect_container() > 0) {
 194                 log_debug("Running in a container, not using DMI hardware data.");
 195                 return false;
 196         }
 197
 198         return true;
 199 }
 200
 201 static int get_dmi_data(const char *database_key, const char *regular_key, char **ret) {
 202         _cleanup_(sd_device_unrefp) sd_device *device = NULL;
 203         _cleanup_free_ char *b = NULL;
 204         const char *s = NULL;
 205         int r;
 206
 207         if (!use_dmi_data())
 208                 return -ENOENT;
 209
 210         r = sd_device_new_from_syspath(&device, "/sys/class/dmi/id");
 211         if (r < 0)
 212                 return log_debug_errno(r, "Failed to open /sys/class/dmi/id device, ignoring: %m");
 213
 214         if (database_key)
 215                 (void) sd_device_get_property_value(device, database_key, &s);
 216         if (!s && regular_key)
 217                 (void) sd_device_get_property_value(device, regular_key, &s);
 218
 219         if (!ret)
 220                 return !!s;
 221
 222         if (s) {
 223                 b = strdup(s);
 224                 if (!b)
 225                         return -ENOMEM;
 226         }
 227
 228         *ret = TAKE_PTR(b);
 229         return !!s;
 230 }
 231
 232 static int get_hardware_vendor(char **ret) {
 233         return get_dmi_data("ID_VENDOR_FROM_DATABASE", "ID_VENDOR", ret);
 234 }
 235
 236 static int get_hardware_model(char **ret) {
 237         return get_dmi_data("ID_MODEL_FROM_DATABASE", "ID_MODEL", ret);
 238 }
 239
 240 static int get_hardware_firmware_data(const char *sysattr, char **ret) {
 241         _cleanup_(sd_device_unrefp) sd_device *device = NULL;
 242         _cleanup_free_ char *b = NULL;
 243         const char *s = NULL;
 244         int r;
 245
 246         assert(sysattr);
 247
 248         if (!use_dmi_data())
 249                 return -ENOENT;
 250
 251         r = sd_device_new_from_syspath(&device, "/sys/class/dmi/id");
 252         if (r < 0)
 253                 return log_debug_errno(r, "Failed to open /sys/class/dmi/id device, ignoring: %m");
 254
 255         (void) sd_device_get_sysattr_value(device, sysattr, &s);
 256         if (!isempty(s)) {
 257                 b = strdup(s);
 258                 if (!b)
 259                         return -ENOMEM;
 260         }
 261
 262         if (ret)
 263                 *ret = TAKE_PTR(b);
 264
 265         return !isempty(s);
 266 }
 267
 268 static int get_hardware_serial(char **ret) {
 269          int r;
 270
 271          r = get_hardware_firmware_data("product_serial", ret);
 272          if (r <= 0)
 273                 return get_hardware_firmware_data("board_serial", ret);
 274
 275          return r;
 276 }
 277
 278 static int get_firmware_version(char **ret) {
 279          return get_hardware_firmware_data("bios_version", ret);
 280 }
 281
 282 static int get_firmware_vendor(char **ret) {
 283          return get_hardware_firmware_data("bios_vendor", ret);
 284 }
 285
 286 static int get_firmware_date(usec_t *ret) {
 287          _cleanup_free_ char *bios_date = NULL, *month = NULL, *day = NULL, *year = NULL;
 288          int r;
 289
 290          assert(ret);
 291
 292          r = get_hardware_firmware_data("bios_date", &bios_date);
 293          if (r < 0)
 294                 return r;
 295          if (r == 0) {
 296                 *ret = USEC_INFINITY;
 297                 return 0;
 298          }
 299
 300          const char *p = bios_date;
 301          r = extract_many_words(&p, "/", EXTRACT_DONT_COALESCE_SEPARATORS, &month, &day, &year, NULL);
 302          if (r < 0)
 303                 return r;
 304          if (r != 3) /* less than three args read? */
 305                 return -EINVAL;
 306          if (!isempty(p)) /* more left in the string? */
 307                 return -EINVAL;
 308
 309          unsigned m, d, y;
 310          r = safe_atou_full(month, 10 | SAFE_ATO_REFUSE_PLUS_MINUS | SAFE_ATO_REFUSE_LEADING_WHITESPACE, &m);
 311          if (r < 0)
 312                 return r;
 313          if (m < 1 || m > 12)
 314                 return -EINVAL;
 315          m -= 1;
 316
 317          r = safe_atou_full(day, 10 | SAFE_ATO_REFUSE_PLUS_MINUS | SAFE_ATO_REFUSE_LEADING_WHITESPACE, &d);
 318          if (r < 0)
 319                 return r;
 320          if (d < 1 || d > 31)
 321                 return -EINVAL;
 322
 323          r = safe_atou_full(year, 10 | SAFE_ATO_REFUSE_PLUS_MINUS | SAFE_ATO_REFUSE_LEADING_WHITESPACE, &y);
 324          if (r < 0)
 325                 return r;
 326          if (y < 1970 || y > (unsigned) INT_MAX)
 327                 return -EINVAL;
 328          y -= 1900;
 329
 330          struct tm tm = {
 331                 .tm_mday = d,
 332                 .tm_mon = m,
 333                 .tm_year = y,
 334          };
 335          time_t v = timegm(&tm);
 336          if (v == (time_t) -1)
 337                 return -errno;
 338          if (tm.tm_mday != (int) d || tm.tm_mon != (int) m || tm.tm_year != (int) y)
 339                 return -EINVAL; /* date was not normalized? (e.g. "30th of feb") */
 340
 341          *ret = (usec_t) v * USEC_PER_SEC;
 342
 343          return 0;
 344 }
 345
 346 static const char* valid_chassis(const char *chassis) {
 347         assert(chassis);
 348
 349         return nulstr_get(
 350                         "vm\0"
 351                         "container\0"
 352                         "desktop\0"
 353                         "laptop\0"
 354                         "convertible\0"
 355                         "server\0"
 356                         "tablet\0"
 357                         "handset\0"
 358                         "watch\0"
 359                         "embedded\0",
 360                         chassis);
 361 }
 362
 363 static bool valid_deployment(const char *deployment) {
 364         assert(deployment);
 365
 366         return in_charset(deployment, VALID_DEPLOYMENT_CHARS);
 367 }
 368
 369 static const char* fallback_chassis(void) {
 370         const char *chassis;
 371         _cleanup_free_ char *type = NULL;
 372         Virtualization v;
 373         unsigned t;
 374         int r;
 375
 376         v = detect_virtualization();
 377         if (v < 0)
 378                 log_debug_errno(v, "Failed to detect virtualization, ignoring: %m");
 379         else if (VIRTUALIZATION_IS_VM(v))
 380                 return "vm";
 381         else if (VIRTUALIZATION_IS_CONTAINER(v))
 382                 return "container";
 383
 384         r = read_one_line_file("/sys/class/dmi/id/chassis_type", &type);
 385         if (r < 0) {
 386                 log_debug_errno(r, "Failed to read DMI chassis type, ignoring: %m");
 387                 goto try_acpi;
 388         }
 389
 390         r = safe_atou(type, &t);
 391         if (r < 0) {
 392                 log_debug_errno(r, "Failed to parse DMI chassis type \"%s\", ignoring: %m", type);
 393                 goto try_acpi;
 394         }
 395
 396         /* We only list the really obvious cases here. The DMI data is unreliable enough, so let's not do any
 397          * additional guesswork on top of that.
 398          *
 399          * See the SMBIOS Specification 3.5.0 section 7.4.1 for details about the values listed here:
 400          *
 401          * https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.5.0.pdf
 402          */
 403
 404         switch (t) {
 405
 406         case 0x03: /* Desktop */
 407         case 0x04: /* Low Profile Desktop */
 408         case 0x06: /* Mini Tower */
 409         case 0x07: /* Tower */
 410         case 0x0D: /* All in one (i.e. PC built into monitor) */
 411         case 0x23: /* Mini PC */
 412         case 0x24: /* Stick PC */
 413                 return "desktop";
 414
 415         case 0x8: /* Portable */
 416         case 0x9: /* Laptop */
 417         case 0xA: /* Notebook */
 418         case 0xE: /* Sub Notebook */
 419                 return "laptop";
 420
 421         case 0xB: /* Hand Held */
 422                 return "handset";
 423
 424         case 0x11: /* Main Server Chassis */
 425         case 0x1C: /* Blade */
 426         case 0x1D: /* Blade Enclosure */
 427                 return "server";
 428
 429         case 0x1E: /* Tablet */
 430                 return "tablet";
 431
 432         case 0x1F: /* Convertible */
 433         case 0x20: /* Detachable */
 434                 return "convertible";
 435
 436         case 0x21: /* IoT Gateway */
 437         case 0x22: /* Embedded PC */
 438                 return "embedded";
 439
 440         default:
 441                 log_debug("Unhandled DMI chassis type 0x%02x, ignoring.", t);
 442         }
 443
 444 try_acpi:
 445         type = mfree(type);
 446         r = read_one_line_file("/sys/firmware/acpi/pm_profile", &type);
 447         if (r < 0) {
 448                 log_debug_errno(r, "Failed read ACPI PM profile, ignoring: %m");
 449                 goto try_devicetree;
 450         }
 451
 452         r = safe_atou(type, &t);
 453         if (r < 0) {
 454                 log_debug_errno(r, "Failed parse ACPI PM profile \"%s\", ignoring: %m", type);
 455                 goto try_devicetree;
 456         }
 457
 458         /* We only list the really obvious cases here as the ACPI data is not really super reliable.
 459          *
 460          * See the ACPI 5.0 Spec Section 5.2.9.1 for details:
 461          *
 462          * http://www.acpi.info/DOWNLOADS/ACPIspec50.pdf
 463          */
 464
 465         switch (t) {
 466
 467         case 1: /* Desktop */
 468         case 3: /* Workstation */
 469         case 6: /* Appliance PC */
 470                 return "desktop";
 471
 472         case 2: /* Mobile */
 473                 return "laptop";
 474
 475         case 4: /* Enterprise Server */
 476         case 5: /* SOHO Server */
 477         case 7: /* Performance Server */
 478                 return "server";
 479
 480         case 8: /* Tablet */
 481                 return "tablet";
 482
 483         default:
 484                 log_debug("Unhandled ACPI PM profile 0x%02x, ignoring.", t);
 485         }
 486
 487 try_devicetree:
 488         type = mfree(type);
 489         r = read_one_line_file("/proc/device-tree/chassis-type", &type);
 490         if (r < 0) {
 491                 log_debug_errno(r, "Failed to read device-tree chassis type, ignoring: %m");
 492                 return NULL;
 493         }
 494
 495         /* Note that the Devicetree specification uses the very same vocabulary
 496          * of chassis types as we do, hence we do not need to translate these types:
 497          *
 498          * https://github.com/devicetree-org/devicetree-specification/blob/master/source/chapter3-devicenodes.rst */
 499         chassis = valid_chassis(type);
 500         if (!chassis)
 501                 log_debug("Invalid device-tree chassis type \"%s\", ignoring.", type);
 502         return chassis;
 503 }
 504
 505 static char* context_get_chassis(Context *c) {
 506         const char *fallback;
 507         char *dmi;
 508
 509         assert(c);
 510
 511         if (!isempty(c->data[PROP_CHASSIS]))
 512                 return strdup(c->data[PROP_CHASSIS]);
 513
 514         if (get_dmi_data("ID_CHASSIS", NULL, &dmi) > 0)
 515                 return dmi;
 516
 517         fallback = fallback_chassis();
 518         if (fallback)
 519                 return strdup(fallback);
 520
 521         return NULL;
 522 }
 523
 524 static char* context_fallback_icon_name(Context *c) {
 525         _cleanup_free_ char *chassis = NULL;
 526
 527         assert(c);
 528
 529         chassis = context_get_chassis(c);
 530         if (chassis)
 531                 return strjoin("computer-", chassis);
 532
 533         return strdup("computer");
 534 }
 535
 536 static int context_update_kernel_hostname(
 537                 Context *c,
 538                 const char *transient_hn) {
 539
 540         _cleanup_free_ char *_hn_free = NULL;
 541         const char *hn;
 542         HostnameSource hns;
 543         int r;
 544
 545         assert(c);
 546
 547         /* /etc/hostname has the highest preference ... */
 548         if (c->data[PROP_STATIC_HOSTNAME]) {
 549                 hn = c->data[PROP_STATIC_HOSTNAME];
 550                 hns = HOSTNAME_STATIC;
 551
 552         /* ... the transient hostname, (ie: DHCP) comes next ... */
 553         } else if (transient_hn) {
 554                 hn = transient_hn;
 555                 hns = HOSTNAME_TRANSIENT;
 556
 557         /* ... and the ultimate fallback */
 558         } else {
 559                 hn = _hn_free = get_default_hostname();
 560                 if (!hn)
 561                         return log_oom();
 562
 563                 hns = HOSTNAME_DEFAULT;
 564         }
 565
 566         r = sethostname_idempotent(hn);
 567         if (r < 0)
 568                 return log_error_errno(r, "Failed to set hostname: %m");
 569
 570         if (c->hostname_source != hns) {
 571                 c->hostname_source = hns;
 572                 r = 1;
 573         }
 574
 575         (void) nscd_flush_cache(STRV_MAKE("hosts"));
 576
 577         if (r == 0)
 578                 log_debug("Hostname was already set to <%s>.", hn);
 579         else {
 580                 log_info("Hostname set to <%s> (%s)", hn, hostname_source_to_string(hns));
 581
 582                 hostname_update_source_hint(hn, hns);
 583         }
 584
 585         return r; /* 0 if no change, 1 if something was done  */
 586 }
 587
 588 static void unset_statp(struct stat **p) {
 589         if (!*p)
 590                 return;
 591
 592         **p = (struct stat) {};
 593 }
 594
 595 static int context_write_data_static_hostname(Context *c) {
 596         _cleanup_(unset_statp) struct stat *s = NULL;
 597         int r;
 598
 599         assert(c);
 600
 601         /* Make sure that if we fail here, we invalidate the cached information, since it was updated
 602          * already, even if we can't make it hit the disk. */
 603         s = &c->etc_hostname_stat;
 604
 605         if (isempty(c->data[PROP_STATIC_HOSTNAME])) {
 606                 if (unlink("/etc/hostname") < 0 && errno != ENOENT)
 607                         return -errno;
 608
 609                 TAKE_PTR(s);
 610                 return 0;
 611         }
 612
 613         r = write_string_file_atomic_label("/etc/hostname", c->data[PROP_STATIC_HOSTNAME]);
 614         if (r < 0)
 615                 return r;
 616
 617         TAKE_PTR(s);
 618         return 0;
 619 }
 620
 621 static int context_write_data_machine_info(Context *c) {
 622         _cleanup_(unset_statp) struct stat *s = NULL;
 623         static const char * const name[_PROP_MAX] = {
 624                 [PROP_PRETTY_HOSTNAME] = "PRETTY_HOSTNAME",
 625                 [PROP_ICON_NAME] = "ICON_NAME",
 626                 [PROP_CHASSIS] = "CHASSIS",
 627                 [PROP_DEPLOYMENT] = "DEPLOYMENT",
 628                 [PROP_LOCATION] = "LOCATION",
 629         };
 630         _cleanup_strv_free_ char **l = NULL;
 631         int r;
 632
 633         assert(c);
 634
 635         /* Make sure that if we fail here, we invalidate the cached information, since it was updated
 636          * already, even if we can't make it hit the disk. */
 637         s = &c->etc_machine_info_stat;
 638
 639         r = load_env_file(NULL, "/etc/machine-info", &l);
 640         if (r < 0 && r != -ENOENT)
 641                 return r;
 642
 643         for (int p = PROP_PRETTY_HOSTNAME; p <= PROP_LOCATION; p++) {
 644                 assert(name[p]);
 645
 646                 r = strv_env_assign(&l, name[p], empty_to_null(c->data[p]));
 647                 if (r < 0)
 648                         return r;
 649         }
 650
 651         if (strv_isempty(l)) {
 652                 if (unlink("/etc/machine-info") < 0 && errno != ENOENT)
 653                         return -errno;
 654
 655                 TAKE_PTR(s);
 656                 return 0;
 657         }
 658
 659         r = write_env_file_label(AT_FDCWD, "/etc/machine-info", NULL, l);
 660         if (r < 0)
 661                 return r;
 662
 663         TAKE_PTR(s);
 664         return 0;
 665 }
 666
 667 static int property_get_hardware_property(
 668                 sd_bus_message *reply,
 669                 Context *c,
 670                 HostProperty prop,
 671                 int (*getter)(char **)) {
 672
 673         _cleanup_free_ char *from_dmi = NULL;
 674
 675         assert(reply);
 676         assert(c);
 677         assert(IN_SET(prop, PROP_HARDWARE_VENDOR, PROP_HARDWARE_MODEL));
 678         assert(getter);
 679
 680         context_read_machine_info(c);
 681
 682         if (isempty(c->data[prop]))
 683                 (void) getter(&from_dmi);
 684
 685         return sd_bus_message_append(reply, "s", from_dmi ?: c->data[prop]);
 686 }
 687
 688 static int property_get_hardware_vendor(
 689                 sd_bus *bus,
 690                 const char *path,
 691                 const char *interface,
 692                 const char *property,
 693                 sd_bus_message *reply,
 694                 void *userdata,
 695                 sd_bus_error *error) {
 696
 697         return property_get_hardware_property(reply, userdata, PROP_HARDWARE_VENDOR, get_hardware_vendor);
 698 }
 699
 700 static int property_get_hardware_model(
 701                 sd_bus *bus,
 702                 const char *path,
 703                 const char *interface,
 704                 const char *property,
 705                 sd_bus_message *reply,
 706                 void *userdata,
 707                 sd_bus_error *error) {
 708
 709         return property_get_hardware_property(reply, userdata, PROP_HARDWARE_MODEL, get_hardware_model);
 710 }
 711
 712 static int property_get_firmware_version(
 713                 sd_bus *bus,
 714                 const char *path,
 715                 const char *interface,
 716                 const char *property,
 717                 sd_bus_message *reply,
 718                 void *userdata,
 719                 sd_bus_error *error) {
 720
 721         _cleanup_free_ char *firmware_version = NULL;
 722
 723         (void) get_firmware_version(&firmware_version);
 724
 725         return sd_bus_message_append(reply, "s", firmware_version);
 726 }
 727
 728 static int property_get_firmware_vendor(
 729                 sd_bus *bus,
 730                 const char *path,
 731                 const char *interface,
 732                 const char *property,
 733                 sd_bus_message *reply,
 734                 void *userdata,
 735                 sd_bus_error *error) {
 736
 737         _cleanup_free_ char *firmware_vendor = NULL;
 738
 739         (void) get_firmware_vendor(&firmware_vendor);
 740
 741         return sd_bus_message_append(reply, "s", firmware_vendor);
 742 }
 743
 744 static int property_get_firmware_date(
 745                 sd_bus *bus,
 746                 const char *path,
 747                 const char *interface,
 748                 const char *property,
 749                 sd_bus_message *reply,
 750                 void *userdata,
 751                 sd_bus_error *error) {
 752
 753         usec_t firmware_date = USEC_INFINITY;
 754
 755         (void) get_firmware_date(&firmware_date);
 756
 757         return sd_bus_message_append(reply, "t", firmware_date);
 758 }
 759 static int property_get_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         _cleanup_free_ char *hn = NULL;
 769         int r;
 770
 771         r = gethostname_strict(&hn);
 772         if (r < 0) {
 773                 if (r != -ENXIO)
 774                         return r;
 775
 776                 hn = get_default_hostname();
 777                 if (!hn)
 778                         return -ENOMEM;
 779         }
 780
 781         return sd_bus_message_append(reply, "s", hn);
 782 }
 783
 784 static int property_get_static_hostname(
 785                 sd_bus *bus,
 786                 const char *path,
 787                 const char *interface,
 788                 const char *property,
 789                 sd_bus_message *reply,
 790                 void *userdata,
 791                 sd_bus_error *error) {
 792
 793         Context *c = ASSERT_PTR(userdata);
 794
 795         context_read_etc_hostname(c);
 796
 797         return sd_bus_message_append(reply, "s", c->data[PROP_STATIC_HOSTNAME]);
 798 }
 799
 800 static int property_get_default_hostname(
 801                 sd_bus *bus,
 802                 const char *path,
 803                 const char *interface,
 804                 const char *property,
 805                 sd_bus_message *reply,
 806                 void *userdata,
 807                 sd_bus_error *error) {
 808
 809         _cleanup_free_ char *hn = NULL;
 810
 811         hn = get_default_hostname();
 812         if (!hn)
 813                 return log_oom();
 814
 815         return sd_bus_message_append(reply, "s", hn);
 816 }
 817
 818 static void context_determine_hostname_source(Context *c) {
 819         _cleanup_free_ char *hostname = NULL;
 820         int r;
 821
 822         assert(c);
 823
 824         if (c->hostname_source >= 0)
 825                 return;
 826
 827         (void) gethostname_full(GET_HOSTNAME_ALLOW_LOCALHOST, &hostname);
 828
 829         if (streq_ptr(hostname, c->data[PROP_STATIC_HOSTNAME]))
 830                 c->hostname_source = HOSTNAME_STATIC;
 831         else {
 832                 _cleanup_free_ char *fallback = NULL;
 833
 834                 /* If the hostname was not set by us, try to figure out where it came from. If we set it to
 835                  * the default hostname, the file will tell us. We compare the string because it is possible
 836                  * that the hostname was set by an older version that had a different fallback, in the initrd
 837                  * or before we reexecuted. */
 838
 839                 r = read_one_line_file("/run/systemd/default-hostname", &fallback);
 840                 if (r < 0 && r != -ENOENT)
 841                         log_warning_errno(r, "Failed to read /run/systemd/default-hostname, ignoring: %m");
 842
 843                 if (streq_ptr(fallback, hostname))
 844                         c->hostname_source = HOSTNAME_DEFAULT;
 845                 else
 846                         c->hostname_source = HOSTNAME_TRANSIENT;
 847         }
 848 }
 849
 850 static int property_get_hostname_source(
 851                 sd_bus *bus,
 852                 const char *path,
 853                 const char *interface,
 854                 const char *property,
 855                 sd_bus_message *reply,
 856                 void *userdata,
 857                 sd_bus_error *error) {
 858
 859         Context *c = ASSERT_PTR(userdata);
 860
 861         context_read_etc_hostname(c);
 862         context_determine_hostname_source(c);
 863
 864         return sd_bus_message_append(reply, "s", hostname_source_to_string(c->hostname_source));
 865 }
 866
 867 static int property_get_machine_info_field(
 868                 sd_bus *bus,
 869                 const char *path,
 870                 const char *interface,
 871                 const char *property,
 872                 sd_bus_message *reply,
 873                 void *userdata,
 874                 sd_bus_error *error) {
 875
 876         sd_bus_slot *slot;
 877         Context *c;
 878
 879         /* Acquire the context object without this property's userdata offset added. Explanation: we want
 880          * access to two pointers here: a) the main context object we cache all properties in, and b) the
 881          * pointer to the property field inside the context object that we are supposed to update and
 882          * use. The latter (b) we get in the 'userdata' function parameter, and sd-bus calculates that for us
 883          * from the 'userdata' pointer we supplied when the vtable was registered, with the offset we
 884          * specified in the vtable added on top. To get the former (a) we need the 'userdata' pointer from
 885          * the vtable registration directly, without the offset added. Hence we ask sd-bus what the slot
 886          * object is (which encapsulates the vtable registration), and then query the 'userdata' field
 887          * directly off it. */
 888         assert_se(slot = sd_bus_get_current_slot(bus));
 889         assert_se(c = sd_bus_slot_get_userdata(slot));
 890
 891         context_read_machine_info(c);
 892
 893         return sd_bus_message_append(reply, "s", *(char**) userdata);
 894 }
 895
 896 static int property_get_os_release_field(
 897                 sd_bus *bus,
 898                 const char *path,
 899                 const char *interface,
 900                 const char *property,
 901                 sd_bus_message *reply,
 902                 void *userdata,
 903                 sd_bus_error *error) {
 904
 905         sd_bus_slot *slot;
 906         Context *c;
 907
 908         /* As above, acquire the current context without this property's userdata offset added. */
 909         assert_se(slot = sd_bus_get_current_slot(bus));
 910         assert_se(c = sd_bus_slot_get_userdata(slot));
 911
 912         context_read_os_release(c);
 913
 914         return sd_bus_message_append(reply, "s", *(char**) userdata);
 915 }
 916
 917 static int property_get_os_support_end(
 918                 sd_bus *bus,
 919                 const char *path,
 920                 const char *interface,
 921                 const char *property,
 922                 sd_bus_message *reply,
 923                 void *userdata,
 924                 sd_bus_error *error) {
 925
 926         Context *c = userdata;
 927         usec_t eol = USEC_INFINITY;
 928
 929         context_read_os_release(c);
 930
 931         if (c->data[PROP_OS_SUPPORT_END])
 932                 (void) os_release_support_ended(c->data[PROP_OS_SUPPORT_END], /* quiet= */ false, &eol);
 933
 934         return sd_bus_message_append(reply, "t", eol);
 935 }
 936
 937 static int property_get_icon_name(
 938                 sd_bus *bus,
 939                 const char *path,
 940                 const char *interface,
 941                 const char *property,
 942                 sd_bus_message *reply,
 943                 void *userdata,
 944                 sd_bus_error *error) {
 945
 946         _cleanup_free_ char *n = NULL;
 947         Context *c = userdata;
 948         const char *name;
 949
 950         context_read_machine_info(c);
 951
 952         if (isempty(c->data[PROP_ICON_NAME]))
 953                 name = n = context_fallback_icon_name(c);
 954         else
 955                 name = c->data[PROP_ICON_NAME];
 956
 957         if (!name)
 958                 return -ENOMEM;
 959
 960         return sd_bus_message_append(reply, "s", name);
 961 }
 962
 963 static int property_get_chassis(
 964                 sd_bus *bus,
 965                 const char *path,
 966                 const char *interface,
 967                 const char *property,
 968                 sd_bus_message *reply,
 969                 void *userdata,
 970                 sd_bus_error *error) {
 971
 972         _cleanup_free_ char *chassis = NULL;
 973         Context *c = userdata;
 974
 975         context_read_machine_info(c);
 976
 977         chassis = context_get_chassis(c);
 978
 979         return sd_bus_message_append(reply, "s", chassis);
 980 }
 981
 982 static int property_get_uname_field(
 983                 sd_bus *bus,
 984                 const char *path,
 985                 const char *interface,
 986                 const char *property,
 987                 sd_bus_message *reply,
 988                 void *userdata,
 989                 sd_bus_error *error) {
 990
 991         struct utsname u;
 992
 993         assert_se(uname(&u) >= 0);
 994
 995         return sd_bus_message_append(reply, "s", (char*) &u + PTR_TO_SIZE(userdata));
 996 }
 997
 998 static int property_get_machine_id(
 999                 sd_bus *bus,
1000                 const char *path,
1001                 const char *interface,
1002                 const char *property,
1003                 sd_bus_message *reply,
1004                 void *userdata,
1005                 sd_bus_error *error) {
1006
1007         sd_id128_t id;
1008         int r;
1009
1010         r = sd_id128_get_machine(&id);
1011         if (r < 0)
1012                 return r;
1013
1014         return bus_property_get_id128(bus, path, interface, property, reply, &id, error);
1015 }
1016
1017 static int property_get_boot_id(
1018                 sd_bus *bus,
1019                 const char *path,
1020                 const char *interface,
1021                 const char *property,
1022                 sd_bus_message *reply,
1023                 void *userdata,
1024                 sd_bus_error *error) {
1025
1026         sd_id128_t id;
1027         int r;
1028
1029         r = sd_id128_get_boot(&id);
1030         if (r < 0)
1031                 return r;
1032
1033         return bus_property_get_id128(bus, path, interface, property, reply, &id, error);
1034 }
1035
1036 static int method_set_hostname(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1037         Context *c = ASSERT_PTR(userdata);
1038         const char *name;
1039         int interactive, r;
1040
1041         assert(m);
1042
1043         r = sd_bus_message_read(m, "sb", &name, &interactive);
1044         if (r < 0)
1045                 return r;
1046
1047         name = empty_to_null(name);
1048
1049         /* We always go through with the procedure below without comparing to the current hostname, because
1050          * we might want to adjust hostname source information even if the actual hostname is unchanged. */
1051
1052         if (name && !hostname_is_valid(name, 0))
1053                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid hostname '%s'", name);
1054
1055         context_read_etc_hostname(c);
1056
1057         r = bus_verify_polkit_async_full(
1058                         m,
1059                         "org.freedesktop.hostname1.set-hostname",
1060                         /* details= */ NULL,
1061                         interactive,
1062                         /* good_user= */ UID_INVALID,
1063                         &c->polkit_registry,
1064                         error);
1065         if (r < 0)
1066                 return r;
1067         if (r == 0)
1068                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1069
1070         r = context_update_kernel_hostname(c, name);
1071         if (r < 0)
1072                 return sd_bus_error_set_errnof(error, r, "Failed to set hostname: %m");
1073         else if (r > 0)
1074                 (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m),
1075                                                       "/org/freedesktop/hostname1", "org.freedesktop.hostname1",
1076                                                       "Hostname", "HostnameSource", NULL);
1077
1078         return sd_bus_reply_method_return(m, NULL);
1079 }
1080
1081 static int method_set_static_hostname(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1082         Context *c = ASSERT_PTR(userdata);
1083         const char *name;
1084         int interactive;
1085         int r;
1086
1087         assert(m);
1088
1089         r = sd_bus_message_read(m, "sb", &name, &interactive);
1090         if (r < 0)
1091                 return r;
1092
1093         name = empty_to_null(name);
1094
1095         context_read_etc_hostname(c);
1096
1097         if (streq_ptr(name, c->data[PROP_STATIC_HOSTNAME]))
1098                 return sd_bus_reply_method_return(m, NULL);
1099
1100         if (name && !hostname_is_valid(name, 0))
1101                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid static hostname '%s'", name);
1102
1103         r = bus_verify_polkit_async_full(
1104                         m,
1105                         "org.freedesktop.hostname1.set-static-hostname",
1106                         /* details= */ NULL,
1107                         interactive,
1108                         /* good_user= */ UID_INVALID,
1109                         &c->polkit_registry,
1110                         error);
1111         if (r < 0)
1112                 return r;
1113         if (r == 0)
1114                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1115
1116         r = free_and_strdup_warn(&c->data[PROP_STATIC_HOSTNAME], name);
1117         if (r < 0)
1118                 return r;
1119
1120         r = context_write_data_static_hostname(c);
1121         if (r < 0) {
1122                 log_error_errno(r, "Failed to write static hostname: %m");
1123                 if (ERRNO_IS_PRIVILEGE(r))
1124                         return sd_bus_error_set(error, BUS_ERROR_FILE_IS_PROTECTED, "Not allowed to update /etc/hostname.");
1125                 if (r == -EROFS)
1126                         return sd_bus_error_set(error, BUS_ERROR_READ_ONLY_FILESYSTEM, "/etc/hostname is in a read-only filesystem.");
1127                 return sd_bus_error_set_errnof(error, r, "Failed to set static hostname: %m");
1128         }
1129
1130         r = context_update_kernel_hostname(c, NULL);
1131         if (r < 0) {
1132                 log_error_errno(r, "Failed to set hostname: %m");
1133                 return sd_bus_error_set_errnof(error, r, "Failed to set hostname: %m");
1134         }
1135
1136         (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m),
1137                                               "/org/freedesktop/hostname1", "org.freedesktop.hostname1",
1138                                               "StaticHostname", "Hostname", "HostnameSource", NULL);
1139
1140         return sd_bus_reply_method_return(m, NULL);
1141 }
1142
1143 static int set_machine_info(Context *c, sd_bus_message *m, int prop, sd_bus_message_handler_t cb, sd_bus_error *error) {
1144         int interactive;
1145         const char *name;
1146         int r;
1147
1148         assert(c);
1149         assert(m);
1150
1151         r = sd_bus_message_read(m, "sb", &name, &interactive);
1152         if (r < 0)
1153                 return r;
1154
1155         name = empty_to_null(name);
1156
1157         context_read_machine_info(c);
1158
1159         if (streq_ptr(name, c->data[prop]))
1160                 return sd_bus_reply_method_return(m, NULL);
1161
1162         if (!isempty(name)) {
1163                 /* The icon name might ultimately be used as file
1164                  * name, so better be safe than sorry */
1165
1166                 if (prop == PROP_ICON_NAME && !filename_is_valid(name))
1167                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid icon name '%s'", name);
1168                 if (prop == PROP_PRETTY_HOSTNAME && string_has_cc(name, NULL))
1169                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid pretty hostname '%s'", name);
1170                 if (prop == PROP_CHASSIS && !valid_chassis(name))
1171                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid chassis '%s'", name);
1172                 if (prop == PROP_DEPLOYMENT && !valid_deployment(name))
1173                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid deployment '%s'", name);
1174                 if (prop == PROP_LOCATION && string_has_cc(name, NULL))
1175                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid location '%s'", name);
1176         }
1177
1178         /* Since the pretty hostname should always be changed at the same time as the static one, use the
1179          * same policy action for both... */
1180
1181         r = bus_verify_polkit_async_full(
1182                         m,
1183                         prop == PROP_PRETTY_HOSTNAME ? "org.freedesktop.hostname1.set-static-hostname" : "org.freedesktop.hostname1.set-machine-info",
1184                         /* details= */ NULL,
1185                         interactive,
1186                         /* good_user= */ UID_INVALID,
1187                         &c->polkit_registry,
1188                         error);
1189         if (r < 0)
1190                 return r;
1191         if (r == 0)
1192                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1193
1194         r = free_and_strdup_warn(&c->data[prop], name);
1195         if (r < 0)
1196                 return r;
1197
1198         r = context_write_data_machine_info(c);
1199         if (r < 0) {
1200                 log_error_errno(r, "Failed to write machine info: %m");
1201                 if (ERRNO_IS_PRIVILEGE(r))
1202                         return sd_bus_error_set(error, BUS_ERROR_FILE_IS_PROTECTED, "Not allowed to update /etc/machine-info.");
1203                 if (r == -EROFS)
1204                         return sd_bus_error_set(error, BUS_ERROR_READ_ONLY_FILESYSTEM, "/etc/machine-info is in a read-only filesystem.");
1205                 return sd_bus_error_set_errnof(error, r, "Failed to write machine info: %m");
1206         }
1207
1208         log_info("Changed %s to '%s'",
1209                  prop == PROP_PRETTY_HOSTNAME ? "pretty hostname" :
1210                  prop == PROP_DEPLOYMENT ? "deployment" :
1211                  prop == PROP_LOCATION ? "location" :
1212                  prop == PROP_CHASSIS ? "chassis" : "icon name", strna(c->data[prop]));
1213
1214         (void) sd_bus_emit_properties_changed(
1215                         sd_bus_message_get_bus(m),
1216                         "/org/freedesktop/hostname1",
1217                         "org.freedesktop.hostname1",
1218                         prop == PROP_PRETTY_HOSTNAME ? "PrettyHostname" :
1219                         prop == PROP_DEPLOYMENT ? "Deployment" :
1220                         prop == PROP_LOCATION ? "Location" :
1221                         prop == PROP_CHASSIS ? "Chassis" : "IconName" , NULL);
1222
1223         return sd_bus_reply_method_return(m, NULL);
1224 }
1225
1226 static int method_set_pretty_hostname(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1227         return set_machine_info(userdata, m, PROP_PRETTY_HOSTNAME, method_set_pretty_hostname, error);
1228 }
1229
1230 static int method_set_icon_name(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1231         return set_machine_info(userdata, m, PROP_ICON_NAME, method_set_icon_name, error);
1232 }
1233
1234 static int method_set_chassis(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1235         return set_machine_info(userdata, m, PROP_CHASSIS, method_set_chassis, error);
1236 }
1237
1238 static int method_set_deployment(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1239         return set_machine_info(userdata, m, PROP_DEPLOYMENT, method_set_deployment, error);
1240 }
1241
1242 static int method_set_location(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1243         return set_machine_info(userdata, m, PROP_LOCATION, method_set_location, error);
1244 }
1245
1246 static int method_get_product_uuid(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1247         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1248         Context *c = ASSERT_PTR(userdata);
1249         int interactive, r;
1250         sd_id128_t uuid;
1251
1252         assert(m);
1253
1254         r = sd_bus_message_read(m, "b", &interactive);
1255         if (r < 0)
1256                 return r;
1257
1258         r = bus_verify_polkit_async_full(
1259                         m,
1260                         "org.freedesktop.hostname1.get-product-uuid",
1261                         /* details= */ NULL,
1262                         interactive,
1263                         /* good_user= */ UID_INVALID,
1264                         &c->polkit_registry,
1265                         error);
1266         if (r < 0)
1267                 return r;
1268         if (r == 0)
1269                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1270
1271         r = id128_get_product(&uuid);
1272         if (r < 0) {
1273                 if (r == -EADDRNOTAVAIL)
1274                         log_debug_errno(r, "DMI product UUID is all 0x00 or all 0xFF, ignoring.");
1275                 else
1276                         log_full_errno(r == -ENOENT ? LOG_DEBUG : LOG_WARNING, r,
1277                                        "Failed to read product UUID, ignoring: %m");
1278
1279                 return sd_bus_error_set(error, BUS_ERROR_NO_PRODUCT_UUID,
1280                                         "Failed to read product UUID from firmware.");
1281         }
1282
1283         r = sd_bus_message_new_method_return(m, &reply);
1284         if (r < 0)
1285                 return r;
1286
1287         r = sd_bus_message_append_array(reply, 'y', uuid.bytes, sizeof(uuid.bytes));
1288         if (r < 0)
1289                 return r;
1290
1291         return sd_bus_send(NULL, reply, NULL);
1292 }
1293
1294 static int method_get_hardware_serial(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1295         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1296         _cleanup_free_ char *serial = NULL;
1297         Context *c = ASSERT_PTR(userdata);
1298         int r;
1299
1300         assert(m);
1301
1302         r = bus_verify_polkit_async(
1303                         m,
1304                         "org.freedesktop.hostname1.get-hardware-serial",
1305                         /* details= */ NULL,
1306                         &c->polkit_registry,
1307                         error);
1308         if (r < 0)
1309                 return r;
1310         if (r == 0)
1311                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1312
1313         r = get_hardware_serial(&serial);
1314         if (r < 0)
1315                 return r;
1316
1317         r = sd_bus_message_new_method_return(m, &reply);
1318         if (r < 0)
1319                 return r;
1320
1321         r = sd_bus_message_append(reply, "s", serial);
1322         if (r < 0)
1323                 return r;
1324
1325         return sd_bus_send(NULL, reply, NULL);
1326 }
1327
1328 static int method_describe(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1329         _cleanup_free_ char *hn = NULL, *dhn = NULL, *in = NULL, *text = NULL,
1330                 *chassis = NULL, *vendor = NULL, *model = NULL, *serial = NULL, *firmware_version = NULL,
1331                 *firmware_vendor = NULL;
1332         usec_t firmware_date = USEC_INFINITY, eol = USEC_INFINITY;
1333         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1334         _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
1335         sd_id128_t machine_id, boot_id, product_uuid = SD_ID128_NULL;
1336         Context *c = ASSERT_PTR(userdata);
1337         bool privileged;
1338         struct utsname u;
1339         int r;
1340
1341         assert(m);
1342
1343         r = bus_verify_polkit_async(
1344                         m,
1345                         "org.freedesktop.hostname1.get-description",
1346                         /* details= */ NULL,
1347                         &c->polkit_registry,
1348                         error);
1349         if (r == 0)
1350                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1351
1352         /* We ignore all authentication errors here, since most data is unprivileged, the one exception being
1353          * the product ID which we'll check explicitly. */
1354         privileged = r > 0;
1355
1356         context_read_etc_hostname(c);
1357         context_read_machine_info(c);
1358         context_read_os_release(c);
1359         context_determine_hostname_source(c);
1360
1361         r = gethostname_strict(&hn);
1362         if (r < 0) {
1363                 if (r != -ENXIO)
1364                         return log_error_errno(r, "Failed to read local host name: %m");
1365
1366                 hn = get_default_hostname();
1367                 if (!hn)
1368                         return log_oom();
1369         }
1370
1371         dhn = get_default_hostname();
1372         if (!dhn)
1373                 return log_oom();
1374
1375         if (isempty(c->data[PROP_ICON_NAME]))
1376                 in = context_fallback_icon_name(c);
1377
1378         chassis = context_get_chassis(c);
1379
1380         assert_se(uname(&u) >= 0);
1381
1382         if (isempty(c->data[PROP_HARDWARE_VENDOR]))
1383                 (void) get_hardware_vendor(&vendor);
1384         if (isempty(c->data[PROP_HARDWARE_MODEL]))
1385                 (void) get_hardware_model(&model);
1386
1387         if (privileged) {
1388                 /* The product UUID and hardware serial is only available to privileged clients */
1389                 (void) id128_get_product(&product_uuid);
1390                 (void) get_hardware_serial(&serial);
1391         }
1392         (void) get_firmware_version(&firmware_version);
1393         (void) get_firmware_vendor(&firmware_vendor);
1394         (void) get_firmware_date(&firmware_date);
1395
1396         if (c->data[PROP_OS_SUPPORT_END])
1397                 (void) os_release_support_ended(c->data[PROP_OS_SUPPORT_END], /* quiet= */ false, &eol);
1398
1399         r = sd_id128_get_machine(&machine_id);
1400         if (r < 0)
1401                 return log_error_errno(r, "Failed to get machine ID: %m");
1402
1403         r = sd_id128_get_boot(&boot_id);
1404         if (r < 0)
1405                 return log_error_errno(r, "Failed to get boot ID: %m");
1406
1407         r = json_build(&v, JSON_BUILD_OBJECT(
1408                                        JSON_BUILD_PAIR("Hostname", JSON_BUILD_STRING(hn)),
1409                                        JSON_BUILD_PAIR("StaticHostname", JSON_BUILD_STRING(c->data[PROP_STATIC_HOSTNAME])),
1410                                        JSON_BUILD_PAIR("PrettyHostname", JSON_BUILD_STRING(c->data[PROP_PRETTY_HOSTNAME])),
1411                                        JSON_BUILD_PAIR("DefaultHostname", JSON_BUILD_STRING(dhn)),
1412                                        JSON_BUILD_PAIR("HostnameSource", JSON_BUILD_STRING(hostname_source_to_string(c->hostname_source))),
1413                                        JSON_BUILD_PAIR("IconName", JSON_BUILD_STRING(in ?: c->data[PROP_ICON_NAME])),
1414                                        JSON_BUILD_PAIR("Chassis", JSON_BUILD_STRING(chassis)),
1415                                        JSON_BUILD_PAIR("Deployment", JSON_BUILD_STRING(c->data[PROP_DEPLOYMENT])),
1416                                        JSON_BUILD_PAIR("Location", JSON_BUILD_STRING(c->data[PROP_LOCATION])),
1417                                        JSON_BUILD_PAIR("KernelName", JSON_BUILD_STRING(u.sysname)),
1418                                        JSON_BUILD_PAIR("KernelRelease", JSON_BUILD_STRING(u.release)),
1419                                        JSON_BUILD_PAIR("KernelVersion", JSON_BUILD_STRING(u.version)),
1420                                        JSON_BUILD_PAIR("OperatingSystemPrettyName", JSON_BUILD_STRING(c->data[PROP_OS_PRETTY_NAME])),
1421                                        JSON_BUILD_PAIR("OperatingSystemCPEName", JSON_BUILD_STRING(c->data[PROP_OS_CPE_NAME])),
1422                                        JSON_BUILD_PAIR("OperatingSystemHomeURL", JSON_BUILD_STRING(c->data[PROP_OS_HOME_URL])),
1423                                        JSON_BUILD_PAIR_FINITE_USEC("OperatingSystemSupportEnd", eol),
1424                                        JSON_BUILD_PAIR("HardwareVendor", JSON_BUILD_STRING(vendor ?: c->data[PROP_HARDWARE_VENDOR])),
1425                                        JSON_BUILD_PAIR("HardwareModel", JSON_BUILD_STRING(model ?: c->data[PROP_HARDWARE_MODEL])),
1426                                        JSON_BUILD_PAIR("HardwareSerial", JSON_BUILD_STRING(serial)),
1427                                        JSON_BUILD_PAIR("FirmwareVersion", JSON_BUILD_STRING(firmware_version)),
1428                                        JSON_BUILD_PAIR("FirmwareVendor", JSON_BUILD_STRING(firmware_vendor)),
1429                                        JSON_BUILD_PAIR_FINITE_USEC("FirmwareDate", firmware_date),
1430                                        JSON_BUILD_PAIR_ID128("MachineID", machine_id),
1431                                        JSON_BUILD_PAIR_ID128("BootID", boot_id),
1432                                        JSON_BUILD_PAIR_CONDITION(!sd_id128_is_null(product_uuid), "ProductUUID", JSON_BUILD_ID128(product_uuid)),
1433                                        JSON_BUILD_PAIR_CONDITION(sd_id128_is_null(product_uuid), "ProductUUID", JSON_BUILD_NULL)));
1434
1435         if (r < 0)
1436                 return log_error_errno(r, "Failed to build JSON data: %m");
1437
1438         r = json_variant_format(v, 0, &text);
1439         if (r < 0)
1440                 return log_error_errno(r, "Failed to format JSON data: %m");
1441
1442         r = sd_bus_message_new_method_return(m, &reply);
1443         if (r < 0)
1444                 return r;
1445
1446         r = sd_bus_message_append(reply, "s", text);
1447         if (r < 0)
1448                 return r;
1449
1450         return sd_bus_send(NULL, reply, NULL);
1451 }
1452
1453 static const sd_bus_vtable hostname_vtable[] = {
1454         SD_BUS_VTABLE_START(0),
1455         SD_BUS_PROPERTY("Hostname", "s", property_get_hostname, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1456         SD_BUS_PROPERTY("StaticHostname", "s", property_get_static_hostname, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1457         SD_BUS_PROPERTY("PrettyHostname", "s", property_get_machine_info_field, offsetof(Context, data) + sizeof(char*) * PROP_PRETTY_HOSTNAME, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1458         SD_BUS_PROPERTY("DefaultHostname", "s", property_get_default_hostname, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1459         SD_BUS_PROPERTY("HostnameSource", "s", property_get_hostname_source, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1460         SD_BUS_PROPERTY("IconName", "s", property_get_icon_name, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1461         SD_BUS_PROPERTY("Chassis", "s", property_get_chassis, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1462         SD_BUS_PROPERTY("Deployment", "s", property_get_machine_info_field, offsetof(Context, data) + sizeof(char*) * PROP_DEPLOYMENT, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1463         SD_BUS_PROPERTY("Location", "s", property_get_machine_info_field, offsetof(Context, data) + sizeof(char*) * PROP_LOCATION, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1464         SD_BUS_PROPERTY("KernelName", "s", property_get_uname_field, offsetof(struct utsname, sysname), SD_BUS_VTABLE_ABSOLUTE_OFFSET|SD_BUS_VTABLE_PROPERTY_CONST),
1465         SD_BUS_PROPERTY("KernelRelease", "s", property_get_uname_field, offsetof(struct utsname, release), SD_BUS_VTABLE_ABSOLUTE_OFFSET|SD_BUS_VTABLE_PROPERTY_CONST),
1466         SD_BUS_PROPERTY("KernelVersion", "s", property_get_uname_field, offsetof(struct utsname, version), SD_BUS_VTABLE_ABSOLUTE_OFFSET|SD_BUS_VTABLE_PROPERTY_CONST),
1467         SD_BUS_PROPERTY("OperatingSystemPrettyName", "s", property_get_os_release_field, offsetof(Context, data) + sizeof(char*) * PROP_OS_PRETTY_NAME, SD_BUS_VTABLE_PROPERTY_CONST),
1468         SD_BUS_PROPERTY("OperatingSystemCPEName", "s", property_get_os_release_field, offsetof(Context, data) + sizeof(char*) * PROP_OS_CPE_NAME, SD_BUS_VTABLE_PROPERTY_CONST),
1469         SD_BUS_PROPERTY("OperatingSystemSupportEnd", "t", property_get_os_support_end, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1470         SD_BUS_PROPERTY("HomeURL", "s", property_get_os_release_field, offsetof(Context, data) + sizeof(char*) * PROP_OS_HOME_URL, SD_BUS_VTABLE_PROPERTY_CONST),
1471         SD_BUS_PROPERTY("HardwareVendor", "s", property_get_hardware_vendor, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1472         SD_BUS_PROPERTY("HardwareModel", "s", property_get_hardware_model, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1473         SD_BUS_PROPERTY("FirmwareVersion", "s", property_get_firmware_version, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1474         SD_BUS_PROPERTY("FirmwareVendor", "s", property_get_firmware_vendor, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1475         SD_BUS_PROPERTY("FirmwareDate", "t", property_get_firmware_date, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1476         SD_BUS_PROPERTY("MachineID", "ay", property_get_machine_id, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1477         SD_BUS_PROPERTY("BootID", "ay", property_get_boot_id, 0, SD_BUS_VTABLE_PROPERTY_CONST),
1478
1479         SD_BUS_METHOD_WITH_ARGS("SetHostname",
1480                                 SD_BUS_ARGS("s", hostname, "b", interactive),
1481                                 SD_BUS_NO_RESULT,
1482                                 method_set_hostname,
1483                                 SD_BUS_VTABLE_UNPRIVILEGED),
1484         SD_BUS_METHOD_WITH_ARGS("SetStaticHostname",
1485                                 SD_BUS_ARGS("s", hostname, "b", interactive),
1486                                 SD_BUS_NO_RESULT,
1487                                 method_set_static_hostname,
1488                                 SD_BUS_VTABLE_UNPRIVILEGED),
1489         SD_BUS_METHOD_WITH_ARGS("SetPrettyHostname",
1490                                 SD_BUS_ARGS("s", hostname, "b", interactive),
1491                                 SD_BUS_NO_RESULT,
1492                                 method_set_pretty_hostname,
1493                                 SD_BUS_VTABLE_UNPRIVILEGED),
1494         SD_BUS_METHOD_WITH_ARGS("SetIconName",
1495                                 SD_BUS_ARGS("s", icon, "b", interactive),
1496                                 SD_BUS_NO_RESULT,
1497                                 method_set_icon_name,
1498                                 SD_BUS_VTABLE_UNPRIVILEGED),
1499         SD_BUS_METHOD_WITH_ARGS("SetChassis",
1500                                 SD_BUS_ARGS("s", chassis, "b", interactive),
1501                                 SD_BUS_NO_RESULT,
1502                                 method_set_chassis,
1503                                 SD_BUS_VTABLE_UNPRIVILEGED),
1504         SD_BUS_METHOD_WITH_ARGS("SetDeployment",
1505                                 SD_BUS_ARGS("s", deployment, "b", interactive),
1506                                 SD_BUS_NO_RESULT,
1507                                 method_set_deployment,
1508                                 SD_BUS_VTABLE_UNPRIVILEGED),
1509         SD_BUS_METHOD_WITH_ARGS("SetLocation",
1510                                 SD_BUS_ARGS("s", location, "b", interactive),
1511                                 SD_BUS_NO_RESULT,
1512                                 method_set_location,
1513                                 SD_BUS_VTABLE_UNPRIVILEGED),
1514         SD_BUS_METHOD_WITH_ARGS("GetProductUUID",
1515                                 SD_BUS_ARGS("b", interactive),
1516                                 SD_BUS_RESULT("ay", uuid),
1517                                 method_get_product_uuid,
1518                                 SD_BUS_VTABLE_UNPRIVILEGED),
1519         SD_BUS_METHOD_WITH_ARGS("GetHardwareSerial",
1520                                 SD_BUS_NO_ARGS,
1521                                 SD_BUS_RESULT("s", serial),
1522                                 method_get_hardware_serial,
1523                                 SD_BUS_VTABLE_UNPRIVILEGED),
1524         SD_BUS_METHOD_WITH_ARGS("Describe",
1525                                 SD_BUS_NO_ARGS,
1526                                 SD_BUS_RESULT("s", json),
1527                                 method_describe,
1528                                 SD_BUS_VTABLE_UNPRIVILEGED),
1529
1530         SD_BUS_VTABLE_END,
1531 };
1532
1533 static const BusObjectImplementation manager_object = {
1534         "/org/freedesktop/hostname1",
1535         "org.freedesktop.hostname1",
1536         .vtables = BUS_VTABLES(hostname_vtable),
1537 };
1538
1539 static int connect_bus(Context *c, sd_event *event, sd_bus **ret) {
1540         _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
1541         int r;
1542
1543         assert(c);
1544         assert(event);
1545         assert(ret);
1546
1547         r = sd_bus_default_system(&bus);
1548         if (r < 0)
1549                 return log_error_errno(r, "Failed to get system bus connection: %m");
1550
1551         r = bus_add_implementation(bus, &manager_object, c);
1552         if (r < 0)
1553                 return r;
1554
1555         r = bus_log_control_api_register(bus);
1556         if (r < 0)
1557                 return r;
1558
1559         r = sd_bus_request_name_async(bus, NULL, "org.freedesktop.hostname1", 0, NULL, NULL);
1560         if (r < 0)
1561                 return log_error_errno(r, "Failed to request name: %m");
1562
1563         r = sd_bus_attach_event(bus, event, 0);
1564         if (r < 0)
1565                 return log_error_errno(r, "Failed to attach bus to event loop: %m");
1566
1567         *ret = TAKE_PTR(bus);
1568         return 0;
1569 }
1570
1571 static int run(int argc, char *argv[]) {
1572         _cleanup_(context_destroy) Context context = {
1573                 .hostname_source = _HOSTNAME_INVALID, /* appropriate value will be set later */
1574         };
1575         _cleanup_(sd_event_unrefp) sd_event *event = NULL;
1576         _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
1577         int r;
1578
1579         log_setup();
1580
1581         r = service_parse_argv("systemd-hostnamed.service",
1582                                "Manage the system hostname and related metadata.",
1583                                BUS_IMPLEMENTATIONS(&manager_object,
1584                                                    &log_control_object),
1585                                argc, argv);
1586         if (r <= 0)
1587                 return r;
1588
1589         umask(0022);
1590
1591         r = mac_init();
1592         if (r < 0)
1593                 return r;
1594
1595         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
1596
1597         r = sd_event_default(&event);
1598         if (r < 0)
1599                 return log_error_errno(r, "Failed to allocate event loop: %m");
1600
1601         (void) sd_event_set_watchdog(event, true);
1602
1603         r = sd_event_add_signal(event, NULL, SIGINT, NULL, NULL);
1604         if (r < 0)
1605                 return log_error_errno(r, "Failed to install SIGINT handler: %m");
1606
1607         r = sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL);
1608         if (r < 0)
1609                 return log_error_errno(r, "Failed to install SIGTERM handler: %m");
1610
1611         r = connect_bus(&context, event, &bus);
1612         if (r < 0)
1613                 return r;
1614
1615         r = bus_event_loop_with_idle(event, bus, "org.freedesktop.hostname1", DEFAULT_EXIT_USEC, NULL, NULL);
1616         if (r < 0)
1617                 return log_error_errno(r, "Failed to run event loop: %m");
1618
1619         return 0;
1620 }
1621
1622 DEFINE_MAIN_FUNCTION(run);