src/userdb/userdbctl.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <getopt.h>
   4 #include <utmp.h>
   5
   6 #include "dirent-util.h"
   7 #include "errno-list.h"
   8 #include "fd-util.h"
   9 #include "format-table.h"
  10 #include "format-util.h"
  11 #include "group-record-show.h"
  12 #include "main-func.h"
  13 #include "pager.h"
  14 #include "parse-util.h"
  15 #include "pretty-print.h"
  16 #include "socket-util.h"
  17 #include "strv.h"
  18 #include "terminal-util.h"
  19 #include "user-record-show.h"
  20 #include "user-util.h"
  21 #include "userdb.h"
  22 #include "verbs.h"
  23
  24 static enum {
  25         OUTPUT_CLASSIC,
  26         OUTPUT_TABLE,
  27         OUTPUT_FRIENDLY,
  28         OUTPUT_JSON,
  29         _OUTPUT_INVALID = -1
  30 } arg_output = _OUTPUT_INVALID;
  31
  32 static PagerFlags arg_pager_flags = 0;
  33 static bool arg_legend = true;
  34 static char** arg_services = NULL;
  35 static UserDBFlags arg_userdb_flags = 0;
  36
  37 STATIC_DESTRUCTOR_REGISTER(arg_services, strv_freep);
  38
  39 static int show_user(UserRecord *ur, Table *table) {
  40         int r;
  41
  42         assert(ur);
  43
  44         switch (arg_output) {
  45
  46         case OUTPUT_CLASSIC:
  47                 if (!uid_is_valid(ur->uid))
  48                         break;
  49
  50                 printf("%s:x:" UID_FMT ":" GID_FMT ":%s:%s:%s\n",
  51                        ur->user_name,
  52                        ur->uid,
  53                        user_record_gid(ur),
  54                        strempty(user_record_real_name(ur)),
  55                        user_record_home_directory(ur),
  56                        user_record_shell(ur));
  57
  58                 break;
  59
  60         case OUTPUT_JSON:
  61                 json_variant_dump(ur->json, JSON_FORMAT_COLOR_AUTO|JSON_FORMAT_PRETTY, NULL, 0);
  62                 break;
  63
  64         case OUTPUT_FRIENDLY:
  65                 user_record_show(ur, true);
  66
  67                 if (ur->incomplete) {
  68                         fflush(stdout);
  69                         log_warning("Warning: lacking rights to acquire privileged fields of user record of '%s', output incomplete.", ur->user_name);
  70                 }
  71
  72                 break;
  73
  74         case OUTPUT_TABLE:
  75                 assert(table);
  76
  77                 r = table_add_many(
  78                                 table,
  79                                 TABLE_STRING, ur->user_name,
  80                                 TABLE_STRING, user_disposition_to_string(user_record_disposition(ur)),
  81                                 TABLE_UID, ur->uid,
  82                                 TABLE_GID, user_record_gid(ur),
  83                                 TABLE_STRING, empty_to_null(ur->real_name),
  84                                 TABLE_STRING, user_record_home_directory(ur),
  85                                 TABLE_STRING, user_record_shell(ur),
  86                                 TABLE_INT, (int) user_record_disposition(ur));
  87                 if (r < 0)
  88                         return table_log_add_error(r);
  89
  90                 break;
  91
  92         default:
  93                 assert_not_reached("Unexpected output mode");
  94         }
  95
  96         return 0;
  97 }
  98
  99 static int display_user(int argc, char *argv[], void *userdata) {
 100         _cleanup_(table_unrefp) Table *table = NULL;
 101         bool draw_separator = false;
 102         int ret = 0, r;
 103
 104         if (arg_output < 0)
 105                 arg_output = argc > 1 ? OUTPUT_FRIENDLY : OUTPUT_TABLE;
 106
 107         if (arg_output == OUTPUT_TABLE) {
 108                 table = table_new("name", "disposition", "uid", "gid", "realname", "home", "shell", "disposition-numeric");
 109                 if (!table)
 110                         return log_oom();
 111
 112                 (void) table_set_align_percent(table, table_get_cell(table, 0, 2), 100);
 113                 (void) table_set_align_percent(table, table_get_cell(table, 0, 3), 100);
 114                 (void) table_set_empty_string(table, "-");
 115                 (void) table_set_sort(table, (size_t) 7, (size_t) 2, (size_t) -1);
 116                 (void) table_set_display(table, (size_t) 0, (size_t) 1, (size_t) 2, (size_t) 3, (size_t) 4, (size_t) 5, (size_t) 6, (size_t) -1);
 117         }
 118
 119         if (argc > 1) {
 120                 char **i;
 121
 122                 STRV_FOREACH(i, argv + 1) {
 123                         _cleanup_(user_record_unrefp) UserRecord *ur = NULL;
 124                         uid_t uid;
 125
 126                         if (parse_uid(*i, &uid) >= 0)
 127                                 r = userdb_by_uid(uid, arg_userdb_flags, &ur);
 128                         else
 129                                 r = userdb_by_name(*i, arg_userdb_flags, &ur);
 130                         if (r < 0) {
 131                                 if (r == -ESRCH)
 132                                         log_error_errno(r, "User %s does not exist.", *i);
 133                                 else if (r == -EHOSTDOWN)
 134                                         log_error_errno(r, "Selected user database service is not available for this request.");
 135                                 else
 136                                         log_error_errno(r, "Failed to find user %s: %m", *i);
 137
 138                                 if (ret >= 0)
 139                                         ret = r;
 140                         } else {
 141                                 if (draw_separator && arg_output == OUTPUT_FRIENDLY)
 142                                         putchar('\n');
 143
 144                                 r = show_user(ur, table);
 145                                 if (r < 0)
 146                                         return r;
 147
 148                                 draw_separator = true;
 149                         }
 150                 }
 151         } else {
 152                 _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL;
 153
 154                 r = userdb_all(arg_userdb_flags, &iterator);
 155                 if (r < 0)
 156                         return log_error_errno(r, "Failed to enumerate users: %m");
 157
 158                 for (;;) {
 159                         _cleanup_(user_record_unrefp) UserRecord *ur = NULL;
 160
 161                         r = userdb_iterator_get(iterator, &ur);
 162                         if (r == -ESRCH)
 163                                 break;
 164                         if (r == -EHOSTDOWN)
 165                                 return log_error_errno(r, "Selected user database service is not available for this request.");
 166                         if (r < 0)
 167                                 return log_error_errno(r, "Failed acquire next user: %m");
 168
 169                         if (draw_separator && arg_output == OUTPUT_FRIENDLY)
 170                                 putchar('\n');
 171
 172                         r = show_user(ur, table);
 173                         if (r < 0)
 174                                 return r;
 175
 176                         draw_separator = true;
 177                 }
 178         }
 179
 180         if (table) {
 181                 r = table_print(table, NULL);
 182                 if (r < 0)
 183                         return table_log_print_error(r);
 184         }
 185
 186         return ret;
 187 }
 188
 189 static int show_group(GroupRecord *gr, Table *table) {
 190         int r;
 191
 192         assert(gr);
 193
 194         switch (arg_output) {
 195
 196         case OUTPUT_CLASSIC: {
 197                 _cleanup_free_ char *m = NULL;
 198
 199                 if (!gid_is_valid(gr->gid))
 200                         break;
 201
 202                 m = strv_join(gr->members, ",");
 203                 if (!m)
 204                         return log_oom();
 205
 206                 printf("%s:x:" GID_FMT ":%s\n",
 207                        gr->group_name,
 208                        gr->gid,
 209                        m);
 210                 break;
 211         }
 212
 213         case OUTPUT_JSON:
 214                 json_variant_dump(gr->json, JSON_FORMAT_COLOR_AUTO|JSON_FORMAT_PRETTY, NULL, 0);
 215                 break;
 216
 217         case OUTPUT_FRIENDLY:
 218                 group_record_show(gr, true);
 219
 220                 if (gr->incomplete) {
 221                         fflush(stdout);
 222                         log_warning("Warning: lacking rights to acquire privileged fields of group record of '%s', output incomplete.", gr->group_name);
 223                 }
 224
 225                 break;
 226
 227         case OUTPUT_TABLE:
 228                 assert(table);
 229
 230                 r = table_add_many(
 231                                 table,
 232                                 TABLE_STRING, gr->group_name,
 233                                 TABLE_STRING, user_disposition_to_string(group_record_disposition(gr)),
 234                                 TABLE_GID, gr->gid,
 235                                 TABLE_STRING, gr->description,
 236                                 TABLE_INT, (int) group_record_disposition(gr));
 237                 if (r < 0)
 238                         return table_log_add_error(r);
 239
 240                 break;
 241
 242         default:
 243                 assert_not_reached("Unexpected display mode");
 244         }
 245
 246         return 0;
 247 }
 248
 249
 250 static int display_group(int argc, char *argv[], void *userdata) {
 251         _cleanup_(table_unrefp) Table *table = NULL;
 252         bool draw_separator = false;
 253         int ret = 0, r;
 254
 255         if (arg_output < 0)
 256                 arg_output = argc > 1 ? OUTPUT_FRIENDLY : OUTPUT_TABLE;
 257
 258         if (arg_output == OUTPUT_TABLE) {
 259                 table = table_new("name", "disposition", "gid", "description", "disposition-numeric");
 260                 if (!table)
 261                         return log_oom();
 262
 263                 (void) table_set_align_percent(table, table_get_cell(table, 0, 2), 100);
 264                 (void) table_set_empty_string(table, "-");
 265                 (void) table_set_sort(table, (size_t) 3, (size_t) 2, (size_t) -1);
 266                 (void) table_set_display(table, (size_t) 0, (size_t) 1, (size_t) 2, (size_t) 3, (size_t) -1);
 267         }
 268
 269         if (argc > 1) {
 270                 char **i;
 271
 272                 STRV_FOREACH(i, argv + 1) {
 273                         _cleanup_(group_record_unrefp) GroupRecord *gr = NULL;
 274                         gid_t gid;
 275
 276                         if (parse_gid(*i, &gid) >= 0)
 277                                 r = groupdb_by_gid(gid, arg_userdb_flags, &gr);
 278                         else
 279                                 r = groupdb_by_name(*i, arg_userdb_flags, &gr);
 280                         if (r < 0) {
 281                                 if (r == -ESRCH)
 282                                         log_error_errno(r, "Group %s does not exist.", *i);
 283                                 else if (r == -EHOSTDOWN)
 284                                         log_error_errno(r, "Selected group database service is not available for this request.");
 285                                 else
 286                                         log_error_errno(r, "Failed to find group %s: %m", *i);
 287
 288                                 if (ret >= 0)
 289                                         ret = r;
 290                         } else {
 291                                 if (draw_separator && arg_output == OUTPUT_FRIENDLY)
 292                                         putchar('\n');
 293
 294                                 r = show_group(gr, table);
 295                                 if (r < 0)
 296                                         return r;
 297
 298                                 draw_separator = true;
 299                         }
 300                 }
 301
 302         } else {
 303                 _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL;
 304
 305                 r = groupdb_all(arg_userdb_flags, &iterator);
 306                 if (r < 0)
 307                         return log_error_errno(r, "Failed to enumerate groups: %m");
 308
 309                 for (;;) {
 310                         _cleanup_(group_record_unrefp) GroupRecord *gr = NULL;
 311
 312                         r = groupdb_iterator_get(iterator, &gr);
 313                         if (r == -ESRCH)
 314                                 break;
 315                         if (r == -EHOSTDOWN)
 316                                 return log_error_errno(r, "Selected group database service is not available for this request.");
 317                         if (r < 0)
 318                                 return log_error_errno(r, "Failed acquire next group: %m");
 319
 320                         if (draw_separator && arg_output == OUTPUT_FRIENDLY)
 321                                 putchar('\n');
 322
 323                         r = show_group(gr, table);
 324                         if (r < 0)
 325                                 return r;
 326
 327                         draw_separator = true;
 328                 }
 329
 330         }
 331
 332         if (table) {
 333                 r = table_print(table, NULL);
 334                 if (r < 0)
 335                         return table_log_print_error(r);
 336         }
 337
 338         return ret;
 339 }
 340
 341 static int show_membership(const char *user, const char *group, Table *table) {
 342         int r;
 343
 344         assert(user);
 345         assert(group);
 346
 347         switch (arg_output) {
 348
 349         case OUTPUT_CLASSIC:
 350                 /* Strictly speaking there's no 'classic' output for this concept, but let's output it in
 351                  * similar style to the classic output for user/group info */
 352
 353                 printf("%s:%s\n", user, group);
 354                 break;
 355
 356         case OUTPUT_JSON: {
 357                 _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
 358
 359                 r = json_build(&v, JSON_BUILD_OBJECT(
 360                                                JSON_BUILD_PAIR("user", JSON_BUILD_STRING(user)),
 361                                                JSON_BUILD_PAIR("group", JSON_BUILD_STRING(group))));
 362                 if (r < 0)
 363                         return log_error_errno(r, "Failed to build JSON object: %m");
 364
 365                 json_variant_dump(v, JSON_FORMAT_PRETTY|JSON_FORMAT_COLOR_AUTO, NULL, NULL);
 366                 break;
 367         }
 368
 369         case OUTPUT_FRIENDLY:
 370                 /* Hmm, this is not particularly friendly, but not sure how we could do this better */
 371                 printf("%s: %s\n", group, user);
 372                 break;
 373
 374         case OUTPUT_TABLE:
 375                 assert(table);
 376
 377                 r = table_add_many(
 378                                 table,
 379                                 TABLE_STRING, user,
 380                                 TABLE_STRING, group);
 381                 if (r < 0)
 382                         return table_log_add_error(r);
 383
 384                 break;
 385
 386         default:
 387                 assert_not_reached("Unexpected output mode");
 388         }
 389
 390         return 0;
 391 }
 392
 393 static int display_memberships(int argc, char *argv[], void *userdata) {
 394         _cleanup_(table_unrefp) Table *table = NULL;
 395         int ret = 0, r;
 396
 397         if (arg_output < 0)
 398                 arg_output = OUTPUT_TABLE;
 399
 400         if (arg_output == OUTPUT_TABLE) {
 401                 table = table_new("user", "group");
 402                 if (!table)
 403                         return log_oom();
 404
 405                 (void) table_set_sort(table, (size_t) 0, (size_t) 1, (size_t) -1);
 406         }
 407
 408         if (argc > 1) {
 409                 char **i;
 410
 411                 STRV_FOREACH(i, argv + 1) {
 412                         _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL;
 413
 414                         if (streq(argv[0], "users-in-group")) {
 415                                 r = membershipdb_by_group(*i, arg_userdb_flags, &iterator);
 416                                 if (r < 0)
 417                                         return log_error_errno(r, "Failed to enumerate users in group: %m");
 418                         } else if (streq(argv[0], "groups-of-user")) {
 419                                 r = membershipdb_by_user(*i, arg_userdb_flags, &iterator);
 420                                 if (r < 0)
 421                                         return log_error_errno(r, "Failed to enumerate groups of user: %m");
 422                         } else
 423                                 assert_not_reached("Unexpected verb");
 424
 425                         for (;;) {
 426                                 _cleanup_free_ char *user = NULL, *group = NULL;
 427
 428                                 r = membershipdb_iterator_get(iterator, &user, &group);
 429                                 if (r == -ESRCH)
 430                                         break;
 431                                 if (r == -EHOSTDOWN)
 432                                         return log_error_errno(r, "Selected membership database service is not available for this request.");
 433                                 if (r < 0)
 434                                         return log_error_errno(r, "Failed acquire next membership: %m");
 435
 436                                 r = show_membership(user, group, table);
 437                                 if (r < 0)
 438                                         return r;
 439                         }
 440                 }
 441         } else {
 442                 _cleanup_(userdb_iterator_freep) UserDBIterator *iterator = NULL;
 443
 444                 r = membershipdb_all(arg_userdb_flags, &iterator);
 445                 if (r < 0)
 446                         return log_error_errno(r, "Failed to enumerate memberships: %m");
 447
 448                 for (;;) {
 449                         _cleanup_free_ char *user = NULL, *group = NULL;
 450
 451                         r = membershipdb_iterator_get(iterator, &user, &group);
 452                         if (r == -ESRCH)
 453                                 break;
 454                         if (r == -EHOSTDOWN)
 455                                 return log_error_errno(r, "Selected membership database service is not available for this request.");
 456                         if (r < 0)
 457                                 return log_error_errno(r, "Failed acquire next membership: %m");
 458
 459                         r = show_membership(user, group, table);
 460                         if (r < 0)
 461                                 return r;
 462                 }
 463         }
 464
 465         if (table) {
 466                 r = table_print(table, NULL);
 467                 if (r < 0)
 468                         return table_log_print_error(r);
 469         }
 470
 471         return ret;
 472 }
 473
 474 static int display_services(int argc, char *argv[], void *userdata) {
 475         _cleanup_(table_unrefp) Table *t = NULL;
 476         _cleanup_(closedirp) DIR *d = NULL;
 477         struct dirent *de;
 478         int r;
 479
 480         d = opendir("/run/systemd/userdb/");
 481         if (!d) {
 482                 if (errno == ENOENT) {
 483                         log_info("No services.");
 484                         return 0;
 485                 }
 486
 487                 return log_error_errno(errno, "Failed to open /run/systemd/userdb/: %m");
 488         }
 489
 490         t = table_new("service", "listening");
 491         if (!t)
 492                 return log_oom();
 493
 494         (void) table_set_sort(t, (size_t) 0, (size_t) -1);
 495
 496         FOREACH_DIRENT(de, d, return -errno) {
 497                 _cleanup_free_ char *j = NULL, *no = NULL;
 498                 union sockaddr_union sockaddr;
 499                 socklen_t sockaddr_len;
 500                 _cleanup_close_ int fd = -1;
 501
 502                 j = path_join("/run/systemd/userdb/", de->d_name);
 503                 if (!j)
 504                         return log_oom();
 505
 506                 r = sockaddr_un_set_path(&sockaddr.un, j);
 507                 if (r < 0)
 508                         return log_error_errno(r, "Path %s does not fit in AF_UNIX socket address: %m", j);
 509                 sockaddr_len = r;
 510
 511                 fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
 512                 if (fd < 0)
 513                         return log_error_errno(r, "Failed to allocate AF_UNIX/SOCK_STREAM socket: %m");
 514
 515                 if (connect(fd, &sockaddr.un, sockaddr_len) < 0) {
 516                         no = strjoin("No (", errno_to_name(errno), ")");
 517                         if (!no)
 518                                 return log_oom();
 519                 }
 520
 521                 r = table_add_many(t,
 522                                    TABLE_STRING, de->d_name,
 523                                    TABLE_STRING, no ?: "yes",
 524                                    TABLE_SET_COLOR, no ? ansi_highlight_red() : ansi_highlight_green());
 525                 if (r < 0)
 526                         return table_log_add_error(r);
 527         }
 528
 529         if (table_get_rows(t) <= 0) {
 530                 log_info("No services.");
 531                 return 0;
 532         }
 533
 534         if (arg_output == OUTPUT_JSON)
 535                 table_print_json(t, NULL, JSON_FORMAT_PRETTY|JSON_FORMAT_COLOR_AUTO);
 536         else
 537                 table_print(t, NULL);
 538
 539         return 0;
 540 }
 541
 542 static int ssh_authorized_keys(int argc, char *argv[], void *userdata) {
 543         _cleanup_(user_record_unrefp) UserRecord *ur = NULL;
 544         int r;
 545
 546         r = userdb_by_name(argv[1], arg_userdb_flags, &ur);
 547         if (r == -ESRCH)
 548                 return log_error_errno(r, "User %s does not exist.", argv[1]);
 549         else if (r == -EHOSTDOWN)
 550                 return log_error_errno(r, "Selected user database service is not available for this request.");
 551         else if (r == -EINVAL)
 552                 return log_error_errno(r, "Failed to find user %s: %m (Invalid user name?)", argv[1]);
 553         else if (r < 0)
 554                 return log_error_errno(r, "Failed to find user %s: %m", argv[1]);
 555
 556         if (strv_isempty(ur->ssh_authorized_keys))
 557                 log_debug("User record for %s has no public SSH keys.", argv[1]);
 558         else {
 559                 char **i;
 560
 561                 STRV_FOREACH(i, ur->ssh_authorized_keys)
 562                         printf("%s\n", *i);
 563         }
 564
 565         if (ur->incomplete) {
 566                 fflush(stdout);
 567                 log_warning("Warning: lacking rights to acquire privileged fields of user record of '%s', output incomplete.", ur->user_name);
 568         }
 569
 570         return EXIT_SUCCESS;
 571 }
 572
 573 static int help(int argc, char *argv[], void *userdata) {
 574         _cleanup_free_ char *link = NULL;
 575         int r;
 576
 577         (void) pager_open(arg_pager_flags);
 578
 579         r = terminal_urlify_man("userdbctl", "1", &link);
 580         if (r < 0)
 581                 return log_oom();
 582
 583         printf("%s [OPTIONS...] COMMAND ...\n\n"
 584                "%sShow user and group information.%s\n"
 585                "\nCommands:\n"
 586                "  user [USER…]               Inspect user\n"
 587                "  group [GROUP…]             Inspect group\n"
 588                "  users-in-group [GROUP…]    Show users that are members of specified group(s)\n"
 589                "  groups-of-user [USER…]     Show groups the specified user(s) is a member of\n"
 590                "  services                   Show enabled database services\n"
 591                "\nOptions:\n"
 592                "  -h --help                  Show this help\n"
 593                "     --version               Show package version\n"
 594                "     --no-pager              Do not pipe output into a pager\n"
 595                "     --no-legend             Do not show the headers and footers\n"
 596                "     --output=MODE           Select output mode (classic, friendly, table, json)\n"
 597                "  -j                         Equivalent to --output=json\n"
 598                "  -s --service=SERVICE[:SERVICE…]\n"
 599                "                             Query the specified service\n"
 600                "     --with-nss=BOOL         Control whether to include glibc NSS data\n"
 601                "  -N                         Do not synthesize or include glibc NSS data\n"
 602                "                             (Same as --synthesize=no --with-nss=no)\n"
 603                "     --synthesize=BOOL       Synthesize root/nobody user\n"
 604                "\nSee the %s for details.\n"
 605                , program_invocation_short_name
 606                , ansi_highlight(), ansi_normal()
 607                , link
 608         );
 609
 610         return 0;
 611 }
 612
 613 static int parse_argv(int argc, char *argv[]) {
 614
 615         enum {
 616                 ARG_VERSION = 0x100,
 617                 ARG_NO_PAGER,
 618                 ARG_NO_LEGEND,
 619                 ARG_OUTPUT,
 620                 ARG_WITH_NSS,
 621                 ARG_SYNTHESIZE,
 622         };
 623
 624         static const struct option options[] = {
 625                 { "help",       no_argument,       NULL, 'h'            },
 626                 { "version",    no_argument,       NULL, ARG_VERSION    },
 627                 { "no-pager",   no_argument,       NULL, ARG_NO_PAGER   },
 628                 { "no-legend",  no_argument,       NULL, ARG_NO_LEGEND  },
 629                 { "output",     required_argument, NULL, ARG_OUTPUT     },
 630                 { "service",    required_argument, NULL, 's'            },
 631                 { "with-nss",   required_argument, NULL, ARG_WITH_NSS   },
 632                 { "synthesize", required_argument, NULL, ARG_SYNTHESIZE },
 633                 {}
 634         };
 635
 636         const char *e;
 637         int r;
 638
 639         assert(argc >= 0);
 640         assert(argv);
 641
 642         /* We are going to update this environment variable with our own, hence let's first read what is already set */
 643         e = getenv("SYSTEMD_ONLY_USERDB");
 644         if (e) {
 645                 char **l;
 646
 647                 l = strv_split(e, ":");
 648                 if (!l)
 649                         return log_oom();
 650
 651                 strv_free(arg_services);
 652                 arg_services = l;
 653         }
 654
 655         for (;;) {
 656                 int c;
 657
 658                 c = getopt_long(argc, argv, "hjs:N", options, NULL);
 659                 if (c < 0)
 660                         break;
 661
 662                 switch (c) {
 663
 664                 case 'h':
 665                         return help(0, NULL, NULL);
 666
 667                 case ARG_VERSION:
 668                         return version();
 669
 670                 case ARG_NO_PAGER:
 671                         arg_pager_flags |= PAGER_DISABLE;
 672                         break;
 673
 674                 case ARG_NO_LEGEND:
 675                         arg_legend = false;
 676                         break;
 677
 678                 case ARG_OUTPUT:
 679                         if (streq(optarg, "classic"))
 680                                 arg_output = OUTPUT_CLASSIC;
 681                         else if (streq(optarg, "friendly"))
 682                                 arg_output = OUTPUT_FRIENDLY;
 683                         else if (streq(optarg, "json"))
 684                                 arg_output = OUTPUT_JSON;
 685                         else if (streq(optarg, "table"))
 686                                 arg_output = OUTPUT_TABLE;
 687                         else if (streq(optarg, "help")) {
 688                                 puts("classic\n"
 689                                      "friendly\n"
 690                                      "json");
 691                                 return 0;
 692                         } else
 693                                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid --output= mode: %s", optarg);
 694
 695                         break;
 696
 697                 case 'j':
 698                         arg_output = OUTPUT_JSON;
 699                         break;
 700
 701                 case 's':
 702                         if (isempty(optarg))
 703                                 arg_services = strv_free(arg_services);
 704                         else {
 705                                 _cleanup_strv_free_ char **l = NULL;
 706
 707                                 l = strv_split(optarg, ":");
 708                                 if (!l)
 709                                         return log_oom();
 710
 711                                 r = strv_extend_strv(&arg_services, l, true);
 712                                 if (r < 0)
 713                                         return log_oom();
 714                         }
 715
 716                         break;
 717
 718                 case 'N':
 719                         arg_userdb_flags |= USERDB_AVOID_NSS|USERDB_DONT_SYNTHESIZE;
 720                         break;
 721
 722                 case ARG_WITH_NSS:
 723                         r = parse_boolean(optarg);
 724                         if (r < 0)
 725                                 return log_error_errno(r, "Failed to parse --with-nss= parameter: %s", optarg);
 726
 727                         SET_FLAG(arg_userdb_flags, USERDB_AVOID_NSS, !r);
 728                         break;
 729
 730                 case ARG_SYNTHESIZE:
 731                         r = parse_boolean(optarg);
 732                         if (r < 0)
 733                                 return log_error_errno(r, "Failed to parse --synthesize= parameter: %s", optarg);
 734
 735                         SET_FLAG(arg_userdb_flags, USERDB_DONT_SYNTHESIZE, !r);
 736                         break;
 737
 738                 case '?':
 739                         return -EINVAL;
 740
 741                 default:
 742                         assert_not_reached("Unhandled option");
 743                 }
 744         }
 745
 746         return 1;
 747 }
 748
 749 static int run(int argc, char *argv[]) {
 750         static const Verb verbs[] = {
 751                 { "help",                VERB_ANY, VERB_ANY, 0,            help                },
 752                 { "user",                VERB_ANY, VERB_ANY, VERB_DEFAULT, display_user        },
 753                 { "group",               VERB_ANY, VERB_ANY, 0,            display_group       },
 754                 { "users-in-group",      VERB_ANY, VERB_ANY, 0,            display_memberships },
 755                 { "groups-of-user",      VERB_ANY, VERB_ANY, 0,            display_memberships },
 756                 { "services",            VERB_ANY, 1,        0,            display_services    },
 757
 758                 /* This one is a helper for sshd_config's AuthorizedKeysCommand= setting, it's not a
 759                  * user-facing verb and thus should not appear in man pages or --help texts. */
 760                 { "ssh-authorized-keys", 2,        2,        0,            ssh_authorized_keys },
 761                 {}
 762         };
 763
 764         int r;
 765
 766         log_setup_cli();
 767
 768         r = parse_argv(argc, argv);
 769         if (r <= 0)
 770                 return r;
 771
 772         if (arg_services) {
 773                 _cleanup_free_ char *e = NULL;
 774
 775                 e = strv_join(arg_services, ":");
 776                 if (!e)
 777                         return log_oom();
 778
 779                 if (setenv("SYSTEMD_ONLY_USERDB", e, true) < 0)
 780                         return log_error_errno(r, "Failed to set $SYSTEMD_ONLY_USERDB: %m");
 781
 782                 log_info("Enabled services: %s", e);
 783         } else {
 784                 if (unsetenv("SYSTEMD_ONLY_USERDB") < 0)
 785                         return log_error_errno(r, "Failed to unset $SYSTEMD_ONLY_USERDB: %m");
 786         }
 787
 788         return dispatch_verb(argc, argv, verbs, NULL);
 789 }
 790
 791 DEFINE_MAIN_FUNCTION(run);