src/firstboot/firstboot.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <fcntl.h>
   4 #include <getopt.h>
   5 #include <unistd.h>
   6
   7 #include "sd-id128.h"
   8
   9 #include "alloc-util.h"
  10 #include "ask-password-api.h"
  11 #include "copy.h"
  12 #include "env-file.h"
  13 #include "fd-util.h"
  14 #include "fileio.h"
  15 #include "fs-util.h"
  16 #include "hostname-util.h"
  17 #include "kbd-util.h"
  18 #include "libcrypt-util.h"
  19 #include "locale-util.h"
  20 #include "main-func.h"
  21 #include "memory-util.h"
  22 #include "mkdir.h"
  23 #include "os-util.h"
  24 #include "parse-util.h"
  25 #include "path-util.h"
  26 #include "pretty-print.h"
  27 #include "proc-cmdline.h"
  28 #include "random-util.h"
  29 #include "string-util.h"
  30 #include "strv.h"
  31 #include "terminal-util.h"
  32 #include "time-util.h"
  33 #include "tmpfile-util-label.h"
  34 #include "umask-util.h"
  35 #include "user-util.h"
  36
  37 static char *arg_root = NULL;
  38 static char *arg_locale = NULL;  /* $LANG */
  39 static char *arg_keymap = NULL;
  40 static char *arg_locale_messages = NULL; /* $LC_MESSAGES */
  41 static char *arg_timezone = NULL;
  42 static char *arg_hostname = NULL;
  43 static sd_id128_t arg_machine_id = {};
  44 static char *arg_root_password = NULL;
  45 static bool arg_prompt_locale = false;
  46 static bool arg_prompt_keymap = false;
  47 static bool arg_prompt_timezone = false;
  48 static bool arg_prompt_hostname = false;
  49 static bool arg_prompt_root_password = false;
  50 static bool arg_copy_locale = false;
  51 static bool arg_copy_keymap = false;
  52 static bool arg_copy_timezone = false;
  53 static bool arg_copy_root_password = false;
  54 static bool arg_force = false;
  55 static bool arg_delete_root_password = false;
  56
  57 STATIC_DESTRUCTOR_REGISTER(arg_root, freep);
  58 STATIC_DESTRUCTOR_REGISTER(arg_locale, freep);
  59 STATIC_DESTRUCTOR_REGISTER(arg_locale_messages, freep);
  60 STATIC_DESTRUCTOR_REGISTER(arg_keymap, freep);
  61 STATIC_DESTRUCTOR_REGISTER(arg_timezone, freep);
  62 STATIC_DESTRUCTOR_REGISTER(arg_hostname, freep);
  63 STATIC_DESTRUCTOR_REGISTER(arg_root_password, erase_and_freep);
  64
  65 static bool press_any_key(void) {
  66         char k = 0;
  67         bool need_nl = true;
  68
  69         printf("-- Press any key to proceed --");
  70         fflush(stdout);
  71
  72         (void) read_one_char(stdin, &k, USEC_INFINITY, &need_nl);
  73
  74         if (need_nl)
  75                 putchar('\n');
  76
  77         return k != 'q';
  78 }
  79
  80 static void print_welcome(void) {
  81         _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
  82         static bool done = false;
  83         const char *pn;
  84         int r;
  85
  86         if (done)
  87                 return;
  88
  89         r = parse_os_release(
  90                         arg_root,
  91                         "PRETTY_NAME", &pretty_name,
  92                         "ANSI_COLOR", &ansi_color,
  93                         NULL);
  94         if (r < 0)
  95                 log_full_errno(r == -ENOENT ? LOG_DEBUG : LOG_WARNING, r,
  96                                "Failed to read os-release file, ignoring: %m");
  97
  98         pn = isempty(pretty_name) ? "Linux" : pretty_name;
  99
 100         if (colors_enabled())
 101                 printf("\nWelcome to your new installation of \x1B[%sm%s\x1B[0m!\n", ansi_color, pn);
 102         else
 103                 printf("\nWelcome to your new installation of %s!\n", pn);
 104
 105         printf("\nPlease configure your system!\n\n");
 106
 107         press_any_key();
 108
 109         done = true;
 110 }
 111
 112 static int show_menu(char **x, unsigned n_columns, unsigned width, unsigned percentage) {
 113         unsigned break_lines, break_modulo;
 114         size_t n, per_column, i, j;
 115
 116         assert(n_columns > 0);
 117
 118         n = strv_length(x);
 119         per_column = DIV_ROUND_UP(n, n_columns);
 120
 121         break_lines = lines();
 122         if (break_lines > 2)
 123                 break_lines--;
 124
 125         /* The first page gets two extra lines, since we want to show
 126          * a title */
 127         break_modulo = break_lines;
 128         if (break_modulo > 3)
 129                 break_modulo -= 3;
 130
 131         for (i = 0; i < per_column; i++) {
 132
 133                 for (j = 0; j < n_columns; j ++) {
 134                         _cleanup_free_ char *e = NULL;
 135
 136                         if (j * per_column + i >= n)
 137                                 break;
 138
 139                         e = ellipsize(x[j * per_column + i], width, percentage);
 140                         if (!e)
 141                                 return log_oom();
 142
 143                         printf("%4zu) %-*s", j * per_column + i + 1, width, e);
 144                 }
 145
 146                 putchar('\n');
 147
 148                 /* on the first screen we reserve 2 extra lines for the title */
 149                 if (i % break_lines == break_modulo) {
 150                         if (!press_any_key())
 151                                 return 0;
 152                 }
 153         }
 154
 155         return 0;
 156 }
 157
 158 static int prompt_loop(const char *text, char **l, unsigned percentage, bool (*is_valid)(const char *name), char **ret) {
 159         int r;
 160
 161         assert(text);
 162         assert(is_valid);
 163         assert(ret);
 164
 165         for (;;) {
 166                 _cleanup_free_ char *p = NULL;
 167                 unsigned u;
 168
 169                 r = ask_string(&p, "%s %s (empty to skip, \"list\" to list options): ",
 170                                special_glyph(SPECIAL_GLYPH_TRIANGULAR_BULLET), text);
 171                 if (r < 0)
 172                         return log_error_errno(r, "Failed to query user: %m");
 173
 174                 if (isempty(p)) {
 175                         log_warning("No data entered, skipping.");
 176                         return 0;
 177                 }
 178
 179                 if (streq(p, "list")) {
 180                         r = show_menu(l, 3, 22, percentage);
 181                         if (r < 0)
 182                                 return r;
 183
 184                         putchar('\n');
 185                         continue;
 186                 };
 187
 188                 r = safe_atou(p, &u);
 189                 if (r >= 0) {
 190                         if (u <= 0 || u > strv_length(l)) {
 191                                 log_error("Specified entry number out of range.");
 192                                 continue;
 193                         }
 194
 195                         log_info("Selected '%s'.", l[u-1]);
 196                         if (free_and_strdup(ret, l[u-1]) < 0)
 197                                 return log_oom();
 198
 199                         return 0;
 200                 }
 201
 202                 if (!is_valid(p)) {
 203                         log_error("Entered data invalid.");
 204                         continue;
 205                 }
 206
 207                 return free_and_replace(*ret, p);
 208         }
 209 }
 210
 211 static bool locale_is_ok(const char *name) {
 212
 213         if (arg_root)
 214                 return locale_is_valid(name);
 215
 216         return locale_is_installed(name) > 0;
 217 }
 218
 219 static int prompt_locale(void) {
 220         _cleanup_strv_free_ char **locales = NULL;
 221         int r;
 222
 223         if (arg_locale || arg_locale_messages)
 224                 return 0;
 225
 226         if (!arg_prompt_locale)
 227                 return 0;
 228
 229         r = get_locales(&locales);
 230         if (r < 0)
 231                 return log_error_errno(r, "Cannot query locales list: %m");
 232
 233         if (strv_isempty(locales))
 234                 log_debug("No locales found, skipping locale selection.");
 235         else if (strv_length(locales) == 1) {
 236
 237                 if (streq(locales[0], SYSTEMD_DEFAULT_LOCALE))
 238                         log_debug("Only installed locale is default locale anyway, not setting locale explicitly.");
 239                 else {
 240                         log_debug("Only a single locale available (%s), selecting it as default.", locales[0]);
 241
 242                         arg_locale = strdup(locales[0]);
 243                         if (!arg_locale)
 244                                 return log_oom();
 245
 246                         /* Not setting arg_locale_message here, since it defaults to LANG anyway */
 247                 }
 248         } else {
 249                 print_welcome();
 250
 251                 r = prompt_loop("Please enter system locale name or number",
 252                                 locales, 60, locale_is_ok, &arg_locale);
 253                 if (r < 0)
 254                         return r;
 255
 256                 if (isempty(arg_locale))
 257                         return 0;
 258
 259                 r = prompt_loop("Please enter system message locale name or number",
 260                                 locales, 60, locale_is_ok, &arg_locale_messages);
 261                 if (r < 0)
 262                         return r;
 263
 264                 /* Suppress the messages setting if it's the same as the main locale anyway */
 265                 if (streq_ptr(arg_locale, arg_locale_messages))
 266                         arg_locale_messages = mfree(arg_locale_messages);
 267         }
 268
 269         return 0;
 270 }
 271
 272 static int process_locale(void) {
 273         const char *etc_localeconf;
 274         char* locales[3];
 275         unsigned i = 0;
 276         int r;
 277
 278         etc_localeconf = prefix_roota(arg_root, "/etc/locale.conf");
 279         if (laccess(etc_localeconf, F_OK) >= 0 && !arg_force)
 280                 return 0;
 281
 282         if (arg_copy_locale && arg_root) {
 283
 284                 (void) mkdir_parents(etc_localeconf, 0755);
 285                 r = copy_file("/etc/locale.conf", etc_localeconf, 0, 0644, 0, 0, COPY_REFLINK);
 286                 if (r != -ENOENT) {
 287                         if (r < 0)
 288                                 return log_error_errno(r, "Failed to copy %s: %m", etc_localeconf);
 289
 290                         log_info("%s copied.", etc_localeconf);
 291                         return 0;
 292                 }
 293         }
 294
 295         r = prompt_locale();
 296         if (r < 0)
 297                 return r;
 298
 299         if (!isempty(arg_locale))
 300                 locales[i++] = strjoina("LANG=", arg_locale);
 301         if (!isempty(arg_locale_messages) && !streq(arg_locale_messages, arg_locale))
 302                 locales[i++] = strjoina("LC_MESSAGES=", arg_locale_messages);
 303
 304         if (i == 0)
 305                 return 0;
 306
 307         locales[i] = NULL;
 308
 309         (void) mkdir_parents(etc_localeconf, 0755);
 310         r = write_env_file(etc_localeconf, locales);
 311         if (r < 0)
 312                 return log_error_errno(r, "Failed to write %s: %m", etc_localeconf);
 313
 314         log_info("%s written.", etc_localeconf);
 315         return 0;
 316 }
 317
 318 static int prompt_keymap(void) {
 319         _cleanup_strv_free_ char **kmaps = NULL;
 320         int r;
 321
 322         if (arg_keymap)
 323                 return 0;
 324
 325         if (!arg_prompt_keymap)
 326                 return 0;
 327
 328         r = get_keymaps(&kmaps);
 329         if (r == -ENOENT) /* no keymaps installed */
 330                 return r;
 331         if (r < 0)
 332                 return log_error_errno(r, "Failed to read keymaps: %m");
 333
 334         print_welcome();
 335
 336         return prompt_loop("Please enter system keymap name or number",
 337                            kmaps, 60, keymap_is_valid, &arg_keymap);
 338 }
 339
 340 static int process_keymap(void) {
 341         const char *etc_vconsoleconf;
 342         char **keymap;
 343         int r;
 344
 345         etc_vconsoleconf = prefix_roota(arg_root, "/etc/vconsole.conf");
 346         if (laccess(etc_vconsoleconf, F_OK) >= 0 && !arg_force)
 347                 return 0;
 348
 349         if (arg_copy_keymap && arg_root) {
 350
 351                 (void) mkdir_parents(etc_vconsoleconf, 0755);
 352                 r = copy_file("/etc/vconsole.conf", etc_vconsoleconf, 0, 0644, 0, 0, COPY_REFLINK);
 353                 if (r != -ENOENT) {
 354                         if (r < 0)
 355                                 return log_error_errno(r, "Failed to copy %s: %m", etc_vconsoleconf);
 356
 357                         log_info("%s copied.", etc_vconsoleconf);
 358                         return 0;
 359                 }
 360         }
 361
 362         r = prompt_keymap();
 363         if (r == -ENOENT)
 364                 return 0; /* don't fail if no keymaps are installed */
 365         if (r < 0)
 366                 return r;
 367
 368         if (isempty(arg_keymap))
 369                 return 0;
 370
 371         keymap = STRV_MAKE(strjoina("KEYMAP=", arg_keymap));
 372
 373         r = mkdir_parents(etc_vconsoleconf, 0755);
 374         if (r < 0)
 375                 return log_error_errno(r, "Failed to create the parent directory of %s: %m", etc_vconsoleconf);
 376
 377         r = write_env_file(etc_vconsoleconf, keymap);
 378         if (r < 0)
 379                 return log_error_errno(r, "Failed to write %s: %m", etc_vconsoleconf);
 380
 381         log_info("%s written.", etc_vconsoleconf);
 382         return 0;
 383 }
 384
 385 static bool timezone_is_valid_log_error(const char *name) {
 386         return timezone_is_valid(name, LOG_ERR);
 387 }
 388
 389 static int prompt_timezone(void) {
 390         _cleanup_strv_free_ char **zones = NULL;
 391         int r;
 392
 393         if (arg_timezone)
 394                 return 0;
 395
 396         if (!arg_prompt_timezone)
 397                 return 0;
 398
 399         r = get_timezones(&zones);
 400         if (r < 0)
 401                 return log_error_errno(r, "Cannot query timezone list: %m");
 402
 403         print_welcome();
 404
 405         r = prompt_loop("Please enter timezone name or number",
 406                         zones, 30, timezone_is_valid_log_error, &arg_timezone);
 407         if (r < 0)
 408                 return r;
 409
 410         return 0;
 411 }
 412
 413 static int process_timezone(void) {
 414         const char *etc_localtime, *e;
 415         int r;
 416
 417         etc_localtime = prefix_roota(arg_root, "/etc/localtime");
 418         if (laccess(etc_localtime, F_OK) >= 0 && !arg_force)
 419                 return 0;
 420
 421         if (arg_copy_timezone && arg_root) {
 422                 _cleanup_free_ char *p = NULL;
 423
 424                 r = readlink_malloc("/etc/localtime", &p);
 425                 if (r != -ENOENT) {
 426                         if (r < 0)
 427                                 return log_error_errno(r, "Failed to read host timezone: %m");
 428
 429                         (void) mkdir_parents(etc_localtime, 0755);
 430                         if (symlink(p, etc_localtime) < 0)
 431                                 return log_error_errno(errno, "Failed to create %s symlink: %m", etc_localtime);
 432
 433                         log_info("%s copied.", etc_localtime);
 434                         return 0;
 435                 }
 436         }
 437
 438         r = prompt_timezone();
 439         if (r < 0)
 440                 return r;
 441
 442         if (isempty(arg_timezone))
 443                 return 0;
 444
 445         e = strjoina("../usr/share/zoneinfo/", arg_timezone);
 446
 447         (void) mkdir_parents(etc_localtime, 0755);
 448         if (symlink(e, etc_localtime) < 0)
 449                 return log_error_errno(errno, "Failed to create %s symlink: %m", etc_localtime);
 450
 451         log_info("%s written", etc_localtime);
 452         return 0;
 453 }
 454
 455 static int prompt_hostname(void) {
 456         int r;
 457
 458         if (arg_hostname)
 459                 return 0;
 460
 461         if (!arg_prompt_hostname)
 462                 return 0;
 463
 464         print_welcome();
 465         putchar('\n');
 466
 467         for (;;) {
 468                 _cleanup_free_ char *h = NULL;
 469
 470                 r = ask_string(&h, "%s Please enter hostname for new system (empty to skip): ", special_glyph(SPECIAL_GLYPH_TRIANGULAR_BULLET));
 471                 if (r < 0)
 472                         return log_error_errno(r, "Failed to query hostname: %m");
 473
 474                 if (isempty(h)) {
 475                         log_warning("No hostname entered, skipping.");
 476                         break;
 477                 }
 478
 479                 if (!hostname_is_valid(h, true)) {
 480                         log_error("Specified hostname invalid.");
 481                         continue;
 482                 }
 483
 484                 /* Get rid of the trailing dot that we allow, but don't want to see */
 485                 arg_hostname = hostname_cleanup(h);
 486                 h = NULL;
 487                 break;
 488         }
 489
 490         return 0;
 491 }
 492
 493 static int process_hostname(void) {
 494         const char *etc_hostname;
 495         int r;
 496
 497         etc_hostname = prefix_roota(arg_root, "/etc/hostname");
 498         if (laccess(etc_hostname, F_OK) >= 0 && !arg_force)
 499                 return 0;
 500
 501         r = prompt_hostname();
 502         if (r < 0)
 503                 return r;
 504
 505         if (isempty(arg_hostname))
 506                 return 0;
 507
 508         r = write_string_file(etc_hostname, arg_hostname,
 509                               WRITE_STRING_FILE_CREATE | WRITE_STRING_FILE_SYNC | WRITE_STRING_FILE_MKDIR_0755 |
 510                               (arg_force ? WRITE_STRING_FILE_ATOMIC : 0));
 511         if (r < 0)
 512                 return log_error_errno(r, "Failed to write %s: %m", etc_hostname);
 513
 514         log_info("%s written.", etc_hostname);
 515         return 0;
 516 }
 517
 518 static int process_machine_id(void) {
 519         const char *etc_machine_id;
 520         char id[SD_ID128_STRING_MAX];
 521         int r;
 522
 523         etc_machine_id = prefix_roota(arg_root, "/etc/machine-id");
 524         if (laccess(etc_machine_id, F_OK) >= 0 && !arg_force)
 525                 return 0;
 526
 527         if (sd_id128_is_null(arg_machine_id))
 528                 return 0;
 529
 530         r = write_string_file(etc_machine_id, sd_id128_to_string(arg_machine_id, id),
 531                               WRITE_STRING_FILE_CREATE | WRITE_STRING_FILE_SYNC | WRITE_STRING_FILE_MKDIR_0755 |
 532                               (arg_force ? WRITE_STRING_FILE_ATOMIC : 0));
 533         if (r < 0)
 534                 return log_error_errno(r, "Failed to write machine id: %m");
 535
 536         log_info("%s written.", etc_machine_id);
 537         return 0;
 538 }
 539
 540 static int prompt_root_password(void) {
 541         const char *msg1, *msg2;
 542         int r;
 543
 544         if (arg_root_password)
 545                 return 0;
 546
 547         if (!arg_prompt_root_password)
 548                 return 0;
 549
 550         print_welcome();
 551         putchar('\n');
 552
 553         msg1 = strjoina(special_glyph(SPECIAL_GLYPH_TRIANGULAR_BULLET), " Please enter a new root password (empty to skip):");
 554         msg2 = strjoina(special_glyph(SPECIAL_GLYPH_TRIANGULAR_BULLET), " Please enter new root password again:");
 555
 556         for (;;) {
 557                 _cleanup_strv_free_erase_ char **a = NULL, **b = NULL;
 558
 559                 r = ask_password_tty(-1, msg1, NULL, 0, 0, NULL, &a);
 560                 if (r < 0)
 561                         return log_error_errno(r, "Failed to query root password: %m");
 562                 if (strv_length(a) != 1)
 563                         return log_error_errno(SYNTHETIC_ERRNO(EIO),
 564                                                "Received multiple passwords, where we expected one.");
 565
 566                 if (isempty(*a)) {
 567                         log_warning("No password entered, skipping.");
 568                         break;
 569                 }
 570
 571                 r = ask_password_tty(-1, msg2, NULL, 0, 0, NULL, &b);
 572                 if (r < 0)
 573                         return log_error_errno(r, "Failed to query root password: %m");
 574                 if (strv_length(b) != 1)
 575                         return log_error_errno(SYNTHETIC_ERRNO(EIO),
 576                                                "Received multiple passwords, where we expected one.");
 577
 578                 if (!streq(*a, *b)) {
 579                         log_error("Entered passwords did not match, please try again.");
 580                         continue;
 581                 }
 582
 583                 arg_root_password = TAKE_PTR(*a);
 584                 break;
 585         }
 586
 587         return 0;
 588 }
 589
 590 static int write_root_passwd(const char *passwd_path, const char *password) {
 591         _cleanup_fclose_ FILE *original = NULL, *passwd = NULL;
 592         _cleanup_(unlink_and_freep) char *passwd_tmp = NULL;
 593         int r;
 594
 595         r = fopen_temporary_label("/etc/passwd", passwd_path, &passwd, &passwd_tmp);
 596         if (r < 0)
 597                 return r;
 598
 599         original = fopen(passwd_path, "re");
 600         if (original) {
 601                 struct passwd *i;
 602
 603                 r = sync_rights(fileno(original), fileno(passwd));
 604                 if (r < 0)
 605                         return r;
 606
 607                 while ((r = fgetpwent_sane(original, &i)) > 0) {
 608
 609                         if (streq(i->pw_name, "root"))
 610                                 i->pw_passwd = (char *) password;
 611
 612                         r = putpwent_sane(i, passwd);
 613                         if (r < 0)
 614                                 return r;
 615                 }
 616                 if (r < 0)
 617                         return r;
 618
 619         } else {
 620                 struct passwd root = {
 621                         .pw_name = (char *) "root",
 622                         .pw_passwd = (char *) password,
 623                         .pw_uid = 0,
 624                         .pw_gid = 0,
 625                         .pw_gecos = (char *) "Super User",
 626                         .pw_dir = (char *) "/root",
 627                         .pw_shell = (char *) "/bin/sh",
 628                 };
 629
 630                 if (errno != ENOENT)
 631                         return -errno;
 632
 633                 r = fchmod(fileno(passwd), 0000);
 634                 if (r < 0)
 635                         return -errno;
 636
 637                 r = putpwent_sane(&root, passwd);
 638                 if (r < 0)
 639                         return r;
 640         }
 641
 642         r = fflush_sync_and_check(passwd);
 643         if (r < 0)
 644                 return r;
 645
 646         r = rename_and_apply_smack_floor_label(passwd_tmp, passwd_path);
 647         if (r < 0)
 648                 return r;
 649
 650         return 0;
 651 }
 652
 653 static int write_root_shadow(const char *shadow_path, const char *hashed_password) {
 654         _cleanup_fclose_ FILE *original = NULL, *shadow = NULL;
 655         _cleanup_(unlink_and_freep) char *shadow_tmp = NULL;
 656         int r;
 657
 658         r = fopen_temporary_label("/etc/shadow", shadow_path, &shadow, &shadow_tmp);
 659         if (r < 0)
 660                 return r;
 661
 662         original = fopen(shadow_path, "re");
 663         if (original) {
 664                 struct spwd *i;
 665
 666                 r = sync_rights(fileno(original), fileno(shadow));
 667                 if (r < 0)
 668                         return r;
 669
 670                 while ((r = fgetspent_sane(original, &i)) > 0) {
 671
 672                         if (streq(i->sp_namp, "root")) {
 673                                 i->sp_pwdp = (char *) hashed_password;
 674                                 i->sp_lstchg = (long) (now(CLOCK_REALTIME) / USEC_PER_DAY);
 675                         }
 676
 677                         r = putspent_sane(i, shadow);
 678                         if (r < 0)
 679                                 return r;
 680                 }
 681                 if (r < 0)
 682                         return r;
 683
 684         } else {
 685                 struct spwd root = {
 686                         .sp_namp = (char*) "root",
 687                         .sp_pwdp = (char *) hashed_password,
 688                         .sp_lstchg = (long) (now(CLOCK_REALTIME) / USEC_PER_DAY),
 689                         .sp_min = -1,
 690                         .sp_max = -1,
 691                         .sp_warn = -1,
 692                         .sp_inact = -1,
 693                         .sp_expire = -1,
 694                         .sp_flag = (unsigned long) -1, /* this appears to be what everybody does ... */
 695                 };
 696
 697                 if (errno != ENOENT)
 698                         return -errno;
 699
 700                 r = fchmod(fileno(shadow), 0000);
 701                 if (r < 0)
 702                         return -errno;
 703
 704                 r = putspent_sane(&root, shadow);
 705                 if (r < 0)
 706                         return r;
 707         }
 708
 709         r = fflush_sync_and_check(shadow);
 710         if (r < 0)
 711                 return r;
 712
 713         r = rename_and_apply_smack_floor_label(shadow_tmp, shadow_path);
 714         if (r < 0)
 715                 return r;
 716
 717         return 0;
 718 }
 719
 720 static int process_root_password(void) {
 721         _cleanup_free_ char *salt = NULL;
 722         _cleanup_close_ int lock = -1;
 723         struct crypt_data cd = {};
 724         const char *hashed_password;
 725         const char *etc_shadow;
 726         int r;
 727
 728         etc_shadow = prefix_roota(arg_root, "/etc/shadow");
 729         if (laccess(etc_shadow, F_OK) >= 0 && !arg_force)
 730                 return 0;
 731
 732         (void) mkdir_parents(etc_shadow, 0755);
 733
 734         lock = take_etc_passwd_lock(arg_root);
 735         if (lock < 0)
 736                 return log_error_errno(lock, "Failed to take a lock: %m");
 737
 738         if (arg_delete_root_password) {
 739                 const char *etc_passwd;
 740
 741                 /* Mixing alloca() and other stuff that touches the stack in one expression is not portable. */
 742                 etc_passwd = prefix_roota(arg_root, "/etc/passwd");
 743
 744                 r = write_root_passwd(etc_passwd, "");
 745                 if (r < 0)
 746                         return log_error_errno(r, "Failed to write %s: %m", etc_passwd);
 747
 748                 log_info("%s written", etc_passwd);
 749
 750                 return 0;
 751         }
 752
 753         if (arg_copy_root_password && arg_root) {
 754                 struct spwd *p;
 755
 756                 errno = 0;
 757                 p = getspnam("root");
 758                 if (p || errno != ENOENT) {
 759                         if (!p) {
 760                                 if (!errno)
 761                                         errno = EIO;
 762
 763                                 return log_error_errno(errno, "Failed to find shadow entry for root: %m");
 764                         }
 765
 766                         r = write_root_shadow(etc_shadow, p->sp_pwdp);
 767                         if (r < 0)
 768                                 return log_error_errno(r, "Failed to write %s: %m", etc_shadow);
 769
 770                         log_info("%s copied.", etc_shadow);
 771                         return 0;
 772                 }
 773         }
 774
 775         r = prompt_root_password();
 776         if (r < 0)
 777                 return r;
 778
 779         if (!arg_root_password)
 780                 return 0;
 781
 782         r = make_salt(&salt);
 783         if (r < 0)
 784                 return log_error_errno(r, "Failed to get salt: %m");
 785
 786         errno = 0;
 787         hashed_password = crypt_r(arg_root_password, salt, &cd);
 788         if (!hashed_password)
 789                 return log_error_errno(errno == 0 ? SYNTHETIC_ERRNO(EINVAL) : errno,
 790                                        "Failed to encrypt password: %m");
 791
 792         r = write_root_shadow(etc_shadow, hashed_password);
 793         if (r < 0)
 794                 return log_error_errno(r, "Failed to write %s: %m", etc_shadow);
 795
 796         log_info("%s written.", etc_shadow);
 797         return 0;
 798 }
 799
 800 static int help(void) {
 801         _cleanup_free_ char *link = NULL;
 802         int r;
 803
 804         r = terminal_urlify_man("systemd-firstboot", "1", &link);
 805         if (r < 0)
 806                 return log_oom();
 807
 808         printf("%s [OPTIONS...]\n\n"
 809                "Configures basic settings of the system.\n\n"
 810                "  -h --help                    Show this help\n"
 811                "     --version                 Show package version\n"
 812                "     --root=PATH               Operate on an alternate filesystem root\n"
 813                "     --locale=LOCALE           Set primary locale (LANG=)\n"
 814                "     --locale-messages=LOCALE  Set message locale (LC_MESSAGES=)\n"
 815                "     --keymap=KEYMAP           Set keymap\n"
 816                "     --timezone=TIMEZONE       Set timezone\n"
 817                "     --hostname=NAME           Set hostname\n"
 818                "     --machine-ID=ID           Set machine ID\n"
 819                "     --root-password=PASSWORD  Set root password\n"
 820                "     --root-password-file=FILE Set root password from file\n"
 821                "     --prompt-locale           Prompt the user for locale settings\n"
 822                "     --prompt-keymap           Prompt the user for keymap settings\n"
 823                "     --prompt-timezone         Prompt the user for timezone\n"
 824                "     --prompt-hostname         Prompt the user for hostname\n"
 825                "     --prompt-root-password    Prompt the user for root password\n"
 826                "     --prompt                  Prompt for all of the above\n"
 827                "     --copy-locale             Copy locale from host\n"
 828                "     --copy-keymap             Copy keymap from host\n"
 829                "     --copy-timezone           Copy timezone from host\n"
 830                "     --copy-root-password      Copy root password from host\n"
 831                "     --copy                    Copy locale, keymap, timezone, root password\n"
 832                "     --setup-machine-id        Generate a new random machine ID\n"
 833                "     --force                   Overwrite existing files\n"
 834                "     --delete-root-password    Delete root password\n"
 835                "\nSee the %s for details.\n"
 836                , program_invocation_short_name
 837                , link
 838         );
 839
 840         return 0;
 841 }
 842
 843 static int parse_argv(int argc, char *argv[]) {
 844
 845         enum {
 846                 ARG_VERSION = 0x100,
 847                 ARG_ROOT,
 848                 ARG_LOCALE,
 849                 ARG_LOCALE_MESSAGES,
 850                 ARG_KEYMAP,
 851                 ARG_TIMEZONE,
 852                 ARG_HOSTNAME,
 853                 ARG_MACHINE_ID,
 854                 ARG_ROOT_PASSWORD,
 855                 ARG_ROOT_PASSWORD_FILE,
 856                 ARG_PROMPT,
 857                 ARG_PROMPT_LOCALE,
 858                 ARG_PROMPT_KEYMAP,
 859                 ARG_PROMPT_TIMEZONE,
 860                 ARG_PROMPT_HOSTNAME,
 861                 ARG_PROMPT_ROOT_PASSWORD,
 862                 ARG_COPY,
 863                 ARG_COPY_LOCALE,
 864                 ARG_COPY_KEYMAP,
 865                 ARG_COPY_TIMEZONE,
 866                 ARG_COPY_ROOT_PASSWORD,
 867                 ARG_SETUP_MACHINE_ID,
 868                 ARG_FORCE,
 869                 ARG_DELETE_ROOT_PASSWORD,
 870         };
 871
 872         static const struct option options[] = {
 873                 { "help",                 no_argument,       NULL, 'h'                      },
 874                 { "version",              no_argument,       NULL, ARG_VERSION              },
 875                 { "root",                 required_argument, NULL, ARG_ROOT                 },
 876                 { "locale",               required_argument, NULL, ARG_LOCALE               },
 877                 { "locale-messages",      required_argument, NULL, ARG_LOCALE_MESSAGES      },
 878                 { "keymap",               required_argument, NULL, ARG_KEYMAP               },
 879                 { "timezone",             required_argument, NULL, ARG_TIMEZONE             },
 880                 { "hostname",             required_argument, NULL, ARG_HOSTNAME             },
 881                 { "machine-id",           required_argument, NULL, ARG_MACHINE_ID           },
 882                 { "root-password",        required_argument, NULL, ARG_ROOT_PASSWORD        },
 883                 { "root-password-file",   required_argument, NULL, ARG_ROOT_PASSWORD_FILE   },
 884                 { "prompt",               no_argument,       NULL, ARG_PROMPT               },
 885                 { "prompt-locale",        no_argument,       NULL, ARG_PROMPT_LOCALE        },
 886                 { "prompt-keymap",        no_argument,       NULL, ARG_PROMPT_KEYMAP        },
 887                 { "prompt-timezone",      no_argument,       NULL, ARG_PROMPT_TIMEZONE      },
 888                 { "prompt-hostname",      no_argument,       NULL, ARG_PROMPT_HOSTNAME      },
 889                 { "prompt-root-password", no_argument,       NULL, ARG_PROMPT_ROOT_PASSWORD },
 890                 { "copy",                 no_argument,       NULL, ARG_COPY                 },
 891                 { "copy-locale",          no_argument,       NULL, ARG_COPY_LOCALE          },
 892                 { "copy-keymap",          no_argument,       NULL, ARG_COPY_KEYMAP          },
 893                 { "copy-timezone",        no_argument,       NULL, ARG_COPY_TIMEZONE        },
 894                 { "copy-root-password",   no_argument,       NULL, ARG_COPY_ROOT_PASSWORD   },
 895                 { "setup-machine-id",     no_argument,       NULL, ARG_SETUP_MACHINE_ID     },
 896                 { "force",                no_argument,       NULL, ARG_FORCE                },
 897                 { "delete-root-password", no_argument,       NULL, ARG_DELETE_ROOT_PASSWORD },
 898                 {}
 899         };
 900
 901         int r, c;
 902
 903         assert(argc >= 0);
 904         assert(argv);
 905
 906         while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
 907
 908                 switch (c) {
 909
 910                 case 'h':
 911                         return help();
 912
 913                 case ARG_VERSION:
 914                         return version();
 915
 916                 case ARG_ROOT:
 917                         r = parse_path_argument_and_warn(optarg, true, &arg_root);
 918                         if (r < 0)
 919                                 return r;
 920                         break;
 921
 922                 case ARG_LOCALE:
 923                         r = free_and_strdup(&arg_locale, optarg);
 924                         if (r < 0)
 925                                 return log_oom();
 926
 927                         break;
 928
 929                 case ARG_LOCALE_MESSAGES:
 930                         r = free_and_strdup(&arg_locale_messages, optarg);
 931                         if (r < 0)
 932                                 return log_oom();
 933
 934                         break;
 935
 936                 case ARG_KEYMAP:
 937                         if (!keymap_is_valid(optarg))
 938                                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 939                                                        "Keymap %s is not valid.", optarg);
 940
 941                         r = free_and_strdup(&arg_keymap, optarg);
 942                         if (r < 0)
 943                                 return log_oom();
 944
 945                         break;
 946
 947                 case ARG_TIMEZONE:
 948                         if (!timezone_is_valid(optarg, LOG_ERR))
 949                                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 950                                                        "Timezone %s is not valid.", optarg);
 951
 952                         r = free_and_strdup(&arg_timezone, optarg);
 953                         if (r < 0)
 954                                 return log_oom();
 955
 956                         break;
 957
 958                 case ARG_ROOT_PASSWORD:
 959                         r = free_and_strdup(&arg_root_password, optarg);
 960                         if (r < 0)
 961                                 return log_oom();
 962                         break;
 963
 964                 case ARG_ROOT_PASSWORD_FILE:
 965                         arg_root_password = mfree(arg_root_password);
 966
 967                         r = read_one_line_file(optarg, &arg_root_password);
 968                         if (r < 0)
 969                                 return log_error_errno(r, "Failed to read %s: %m", optarg);
 970
 971                         break;
 972
 973                 case ARG_HOSTNAME:
 974                         if (!hostname_is_valid(optarg, true))
 975                                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 976                                                        "Host name %s is not valid.", optarg);
 977
 978                         hostname_cleanup(optarg);
 979                         r = free_and_strdup(&arg_hostname, optarg);
 980                         if (r < 0)
 981                                 return log_oom();
 982
 983                         break;
 984
 985                 case ARG_MACHINE_ID:
 986                         if (sd_id128_from_string(optarg, &arg_machine_id) < 0)
 987                                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 988                                                        "Failed to parse machine id %s.", optarg);
 989
 990                         break;
 991
 992                 case ARG_PROMPT:
 993                         arg_prompt_locale = arg_prompt_keymap = arg_prompt_timezone = arg_prompt_hostname = arg_prompt_root_password = true;
 994                         break;
 995
 996                 case ARG_PROMPT_LOCALE:
 997                         arg_prompt_locale = true;
 998                         break;
 999
1000                 case ARG_PROMPT_KEYMAP:
1001                         arg_prompt_keymap = true;
1002                         break;
1003
1004                 case ARG_PROMPT_TIMEZONE:
1005                         arg_prompt_timezone = true;
1006                         break;
1007
1008                 case ARG_PROMPT_HOSTNAME:
1009                         arg_prompt_hostname = true;
1010                         break;
1011
1012                 case ARG_PROMPT_ROOT_PASSWORD:
1013                         arg_prompt_root_password = true;
1014                         break;
1015
1016                 case ARG_COPY:
1017                         arg_copy_locale = arg_copy_keymap = arg_copy_timezone = arg_copy_root_password = true;
1018                         break;
1019
1020                 case ARG_COPY_LOCALE:
1021                         arg_copy_locale = true;
1022                         break;
1023
1024                 case ARG_COPY_KEYMAP:
1025                         arg_copy_keymap = true;
1026                         break;
1027
1028                 case ARG_COPY_TIMEZONE:
1029                         arg_copy_timezone = true;
1030                         break;
1031
1032                 case ARG_COPY_ROOT_PASSWORD:
1033                         arg_copy_root_password = true;
1034                         break;
1035
1036                 case ARG_SETUP_MACHINE_ID:
1037
1038                         r = sd_id128_randomize(&arg_machine_id);
1039                         if (r < 0)
1040                                 return log_error_errno(r, "Failed to generate randomized machine ID: %m");
1041
1042                         break;
1043
1044                 case ARG_FORCE:
1045                         arg_force = true;
1046                         break;
1047
1048                 case ARG_DELETE_ROOT_PASSWORD:
1049                         arg_delete_root_password = true;
1050                         break;
1051
1052                 case '?':
1053                         return -EINVAL;
1054
1055                 default:
1056                         assert_not_reached("Unhandled option");
1057                 }
1058
1059         /* We check if the specified locale strings are valid down here, so that we can take --root= into
1060          * account when looking for the locale files. */
1061
1062         if (arg_locale && !locale_is_ok(arg_locale))
1063                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Locale %s is not installed.", arg_locale);
1064         if (arg_locale_messages && !locale_is_ok(arg_locale_messages))
1065                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Locale %s is not installed.", arg_locale_messages);
1066
1067         if (arg_delete_root_password && (arg_copy_root_password || arg_root_password || arg_prompt_root_password))
1068                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1069                                        "--delete-root-password cannot be combined with other root password options");
1070
1071         return 1;
1072 }
1073
1074 static int run(int argc, char *argv[]) {
1075         bool enabled;
1076         int r;
1077
1078         r = parse_argv(argc, argv);
1079         if (r <= 0)
1080                 return r;
1081
1082         log_setup_service();
1083
1084         umask(0022);
1085
1086         r = proc_cmdline_get_bool("systemd.firstboot", &enabled);
1087         if (r < 0)
1088                 return log_error_errno(r, "Failed to parse systemd.firstboot= kernel command line argument, ignoring: %m");
1089         if (r > 0 && !enabled)
1090                 return 0; /* disabled */
1091
1092         r = process_locale();
1093         if (r < 0)
1094                 return r;
1095
1096         r = process_keymap();
1097         if (r < 0)
1098                 return r;
1099
1100         r = process_timezone();
1101         if (r < 0)
1102                 return r;
1103
1104         r = process_hostname();
1105         if (r < 0)
1106                 return r;
1107
1108         r = process_machine_id();
1109         if (r < 0)
1110                 return r;
1111
1112         r = process_root_password();
1113         if (r < 0)
1114                 return r;
1115
1116         return 0;
1117 }
1118
1119 DEFINE_MAIN_FUNCTION(run);