src/journal/journalctl.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2011 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <fcntl.h>
  23 #include <errno.h>
  24 #include <stddef.h>
  25 #include <string.h>
  26 #include <stdio.h>
  27 #include <unistd.h>
  28 #include <stdlib.h>
  29 #include <sys/poll.h>
  30 #include <time.h>
  31 #include <getopt.h>
  32 #include <signal.h>
  33 #include <sys/stat.h>
  34 #include <sys/ioctl.h>
  35 #include <linux/fs.h>
  36 #include <locale.h>
  37 #include <langinfo.h>
  38
  39 #include <systemd/sd-journal.h>
  40
  41 #include "log.h"
  42 #include "util.h"
  43 #include "path-util.h"
  44 #include "build.h"
  45 #include "pager.h"
  46 #include "logs-show.h"
  47 #include "strv.h"
  48 #include "journal-internal.h"
  49 #include "journal-def.h"
  50 #include "journal-verify.h"
  51 #include "journal-authenticate.h"
  52 #include "journal-qrcode.h"
  53 #include "fsprg.h"
  54
  55 #define DEFAULT_FSS_INTERVAL_USEC (15*USEC_PER_MINUTE)
  56
  57 static OutputMode arg_output = OUTPUT_SHORT;
  58 static bool arg_follow = false;
  59 static bool arg_show_all = false;
  60 static bool arg_no_pager = false;
  61 static int arg_lines = -1;
  62 static bool arg_no_tail = false;
  63 static bool arg_quiet = false;
  64 static bool arg_merge = false;
  65 static bool arg_this_boot = false;
  66 static const char *arg_cursor = NULL;
  67 static const char *arg_directory = NULL;
  68 static int arg_priorities = 0xFF;
  69 static const char *arg_verify_key = NULL;
  70 #ifdef HAVE_GCRYPT
  71 static usec_t arg_interval = DEFAULT_FSS_INTERVAL_USEC;
  72 #endif
  73
  74 static enum {
  75         ACTION_SHOW,
  76         ACTION_NEW_ID128,
  77         ACTION_PRINT_HEADER,
  78         ACTION_SETUP_KEYS,
  79         ACTION_VERIFY,
  80         ACTION_DISK_USAGE,
  81 } arg_action = ACTION_SHOW;
  82
  83 static int help(void) {
  84
  85         printf("%s [OPTIONS...] [MATCH]\n\n"
  86                "Send control commands to or query the journal.\n\n"
  87                "  -h --help              Show this help\n"
  88                "     --version           Show package version\n"
  89                "     --no-pager          Do not pipe output into a pager\n"
  90                "  -a --all               Show all fields, including long and unprintable\n"
  91                "  -c --cursor=CURSOR     Jump to the specified cursor\n"
  92                "  -f --follow            Follow journal\n"
  93                "  -n --lines[=INTEGER]   Number of journal entries to show\n"
  94                "     --no-tail           Show all lines, even in follow mode\n"
  95                "  -o --output=STRING     Change journal output mode (short, short-monotonic,\n"
  96                "                         verbose, export, json, json-pretty, cat)\n"
  97                "  -q --quiet             Don't show privilege warning\n"
  98                "  -m --merge             Show entries from all available journals\n"
  99                "  -b --this-boot         Show data only from current boot\n"
 100                "  -D --directory=PATH    Show journal files from directory\n"
 101                "  -p --priority=RANGE    Show only messages within the specified priority range\n\n"
 102                "Commands:\n"
 103                "     --new-id128         Generate a new 128 Bit ID\n"
 104                "     --header            Show journal header information\n"
 105                "     --disk-usage        Show total disk usage\n"
 106 #ifdef HAVE_GCRYPT
 107                "     --setup-keys        Generate new FSS key pair\n"
 108                "       --interval=TIME   Time interval for changing the FSS sealing key\n"
 109                "     --verify            Verify journal file consistency\n"
 110                "       --verify-key=KEY  Specify FSS verification key\n"
 111 #endif
 112                , program_invocation_short_name);
 113
 114         return 0;
 115 }
 116
 117 static int parse_argv(int argc, char *argv[]) {
 118
 119         enum {
 120                 ARG_VERSION = 0x100,
 121                 ARG_NO_PAGER,
 122                 ARG_NO_TAIL,
 123                 ARG_NEW_ID128,
 124                 ARG_HEADER,
 125                 ARG_SETUP_KEYS,
 126                 ARG_INTERVAL,
 127                 ARG_VERIFY,
 128                 ARG_VERIFY_KEY,
 129                 ARG_DISK_USAGE
 130         };
 131
 132         static const struct option options[] = {
 133                 { "help",         no_argument,       NULL, 'h'              },
 134                 { "version" ,     no_argument,       NULL, ARG_VERSION      },
 135                 { "no-pager",     no_argument,       NULL, ARG_NO_PAGER     },
 136                 { "follow",       no_argument,       NULL, 'f'              },
 137                 { "output",       required_argument, NULL, 'o'              },
 138                 { "all",          no_argument,       NULL, 'a'              },
 139                 { "lines",        optional_argument, NULL, 'n'              },
 140                 { "no-tail",      no_argument,       NULL, ARG_NO_TAIL      },
 141                 { "new-id128",    no_argument,       NULL, ARG_NEW_ID128    },
 142                 { "quiet",        no_argument,       NULL, 'q'              },
 143                 { "merge",        no_argument,       NULL, 'm'              },
 144                 { "this-boot",    no_argument,       NULL, 'b'              },
 145                 { "directory",    required_argument, NULL, 'D'              },
 146                 { "header",       no_argument,       NULL, ARG_HEADER       },
 147                 { "priority",     no_argument,       NULL, 'p'              },
 148                 { "setup-keys",   no_argument,       NULL, ARG_SETUP_KEYS   },
 149                 { "interval",     required_argument, NULL, ARG_INTERVAL     },
 150                 { "verify",       no_argument,       NULL, ARG_VERIFY       },
 151                 { "verify-key",   required_argument, NULL, ARG_VERIFY_KEY   },
 152                 { "disk-usage",   no_argument,       NULL, ARG_DISK_USAGE   },
 153                 { "cursor",       required_argument, NULL, 'c'              },
 154                 { NULL,           0,                 NULL, 0                }
 155         };
 156
 157         int c, r;
 158
 159         assert(argc >= 0);
 160         assert(argv);
 161
 162         while ((c = getopt_long(argc, argv, "hfo:an::qmbD:p:c:", options, NULL)) >= 0) {
 163
 164                 switch (c) {
 165
 166                 case 'h':
 167                         help();
 168                         return 0;
 169
 170                 case ARG_VERSION:
 171                         puts(PACKAGE_STRING);
 172                         puts(DISTRIBUTION);
 173                         puts(SYSTEMD_FEATURES);
 174                         return 0;
 175
 176                 case ARG_NO_PAGER:
 177                         arg_no_pager = true;
 178                         break;
 179
 180                 case 'f':
 181                         arg_follow = true;
 182                         signal(SIGWINCH, columns_cache_reset);
 183                         break;
 184
 185                 case 'o':
 186                         arg_output = output_mode_from_string(optarg);
 187                         if (arg_output < 0) {
 188                                 log_error("Unknown output '%s'.", optarg);
 189                                 return -EINVAL;
 190                         }
 191
 192                         break;
 193
 194                 case 'a':
 195                         arg_show_all = true;
 196                         break;
 197
 198                 case 'n':
 199                         if (optarg) {
 200                                 r = safe_atoi(optarg, &arg_lines);
 201                                 if (r < 0 || arg_lines < 0) {
 202                                         log_error("Failed to parse lines '%s'", optarg);
 203                                         return -EINVAL;
 204                                 }
 205                         } else
 206                                 arg_lines = 10;
 207
 208                         break;
 209
 210                 case ARG_NO_TAIL:
 211                         arg_no_tail = true;
 212                         break;
 213
 214                 case ARG_NEW_ID128:
 215                         arg_action = ACTION_NEW_ID128;
 216                         break;
 217
 218                 case 'q':
 219                         arg_quiet = true;
 220                         break;
 221
 222                 case 'm':
 223                         arg_merge = true;
 224                         break;
 225
 226                 case 'b':
 227                         arg_this_boot = true;
 228                         break;
 229
 230                 case 'D':
 231                         arg_directory = optarg;
 232                         break;
 233
 234                 case 'c':
 235                         arg_cursor = optarg;
 236                         break;
 237
 238                 case ARG_HEADER:
 239                         arg_action = ACTION_PRINT_HEADER;
 240                         break;
 241
 242                 case ARG_VERIFY:
 243                         arg_action = ACTION_VERIFY;
 244                         break;
 245
 246                 case ARG_DISK_USAGE:
 247                         arg_action = ACTION_DISK_USAGE;
 248                         break;
 249
 250 #ifdef HAVE_GCRYPT
 251                 case ARG_SETUP_KEYS:
 252                         arg_action = ACTION_SETUP_KEYS;
 253                         break;
 254
 255
 256                 case ARG_VERIFY_KEY:
 257                         arg_action = ACTION_VERIFY;
 258                         arg_verify_key = optarg;
 259                         arg_merge = false;
 260                         break;
 261
 262                 case ARG_INTERVAL:
 263                         r = parse_usec(optarg, &arg_interval);
 264                         if (r < 0 || arg_interval <= 0) {
 265                                 log_error("Failed to parse sealing key change interval: %s", optarg);
 266                                 return -EINVAL;
 267                         }
 268                         break;
 269 #else
 270                 case ARG_SETUP_KEYS:
 271                 case ARG_VERIFY_KEY:
 272                 case ARG_INTERVAL:
 273                         log_error("Forward-secure sealing not available.");
 274                         return -ENOTSUP;
 275 #endif
 276
 277                 case 'p': {
 278                         const char *dots;
 279
 280                         dots = strstr(optarg, "..");
 281                         if (dots) {
 282                                 char *a;
 283                                 int from, to, i;
 284
 285                                 /* a range */
 286                                 a = strndup(optarg, dots - optarg);
 287                                 if (!a)
 288                                         return log_oom();
 289
 290                                 from = log_level_from_string(a);
 291                                 to = log_level_from_string(dots + 2);
 292                                 free(a);
 293
 294                                 if (from < 0 || to < 0) {
 295                                         log_error("Failed to parse log level range %s", optarg);
 296                                         return -EINVAL;
 297                                 }
 298
 299                                 arg_priorities = 0;
 300
 301                                 if (from < to) {
 302                                         for (i = from; i <= to; i++)
 303                                                 arg_priorities |= 1 << i;
 304                                 } else {
 305                                         for (i = to; i <= from; i++)
 306                                                 arg_priorities |= 1 << i;
 307                                 }
 308
 309                         } else {
 310                                 int p, i;
 311
 312                                 p = log_level_from_string(optarg);
 313                                 if (p < 0) {
 314                                         log_error("Unknown log level %s", optarg);
 315                                         return -EINVAL;
 316                                 }
 317
 318                                 arg_priorities = 0;
 319
 320                                 for (i = 0; i <= p; i++)
 321                                         arg_priorities |= 1 << i;
 322                         }
 323
 324                         break;
 325                 }
 326
 327                 case '?':
 328                         return -EINVAL;
 329
 330                 default:
 331                         log_error("Unknown option code %c", c);
 332                         return -EINVAL;
 333                 }
 334         }
 335
 336         if (arg_follow && !arg_no_tail && arg_lines < 0)
 337                 arg_lines = 10;
 338
 339         return 1;
 340 }
 341
 342 static bool on_tty(void) {
 343         static int t = -1;
 344
 345         /* Note that this is invoked relatively early, before we start
 346          * the pager. That means the value we return reflects whether
 347          * we originally were started on a tty, not if we currently
 348          * are. But this is intended, since we want colour and so on
 349          * when run in our own pager. */
 350
 351         if (_unlikely_(t < 0))
 352                 t = isatty(STDOUT_FILENO) > 0;
 353
 354         return t;
 355 }
 356
 357 static int generate_new_id128(void) {
 358         sd_id128_t id;
 359         int r;
 360         unsigned i;
 361
 362         r = sd_id128_randomize(&id);
 363         if (r < 0) {
 364                 log_error("Failed to generate ID: %s", strerror(-r));
 365                 return r;
 366         }
 367
 368         printf("As string:\n"
 369                SD_ID128_FORMAT_STR "\n\n"
 370                "As UUID:\n"
 371                "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n\n"
 372                "As macro:\n"
 373               "#define MESSAGE_XYZ SD_ID128_MAKE(",
 374                SD_ID128_FORMAT_VAL(id),
 375                SD_ID128_FORMAT_VAL(id));
 376
 377         for (i = 0; i < 16; i++)
 378                 printf("%02x%s", id.bytes[i], i != 15 ? "," : "");
 379
 380         fputs(")\n", stdout);
 381
 382         return 0;
 383 }
 384
 385 static int add_matches(sd_journal *j, char **args) {
 386         char **i;
 387         int r;
 388
 389         assert(j);
 390
 391         STRV_FOREACH(i, args) {
 392
 393                 if (streq(*i, "+"))
 394                         r = sd_journal_add_disjunction(j);
 395                 else if (path_is_absolute(*i)) {
 396                         char *p, *t = NULL;
 397                         const char *path;
 398                         struct stat st;
 399
 400                         p = canonicalize_file_name(*i);
 401                         path = p ? p : *i;
 402
 403                         if (stat(path, &st) < 0)  {
 404                                 free(p);
 405                                 log_error("Couldn't stat file: %m");
 406                                 return -errno;
 407                         }
 408
 409                         if (S_ISREG(st.st_mode) && (0111 & st.st_mode))
 410                                 t = strappend("_EXE=", path);
 411                         else if (S_ISCHR(st.st_mode))
 412                                 asprintf(&t, "_KERNEL_DEVICE=c%u:%u", major(st.st_rdev), minor(st.st_rdev));
 413                         else if (S_ISBLK(st.st_mode))
 414                                 asprintf(&t, "_KERNEL_DEVICE=b%u:%u", major(st.st_rdev), minor(st.st_rdev));
 415                         else {
 416                                 free(p);
 417                                 log_error("File is not a device node, regular file or is not executable: %s", *i);
 418                                 return -EINVAL;
 419                         }
 420
 421                         free(p);
 422
 423                         if (!t)
 424                                 return log_oom();
 425
 426                         r = sd_journal_add_match(j, t, 0);
 427                         free(t);
 428                 } else
 429                         r = sd_journal_add_match(j, *i, 0);
 430
 431                 if (r < 0) {
 432                         log_error("Failed to add match '%s': %s", *i, strerror(-r));
 433                         return r;
 434                 }
 435         }
 436
 437         return 0;
 438 }
 439
 440 static int add_this_boot(sd_journal *j) {
 441         char match[9+32+1] = "_BOOT_ID=";
 442         sd_id128_t boot_id;
 443         int r;
 444
 445         assert(j);
 446
 447         if (!arg_this_boot)
 448                 return 0;
 449
 450         r = sd_id128_get_boot(&boot_id);
 451         if (r < 0) {
 452                 log_error("Failed to get boot id: %s", strerror(-r));
 453                 return r;
 454         }
 455
 456         sd_id128_to_string(boot_id, match + 9);
 457         r = sd_journal_add_match(j, match, strlen(match));
 458         if (r < 0) {
 459                 log_error("Failed to add match: %s", strerror(-r));
 460                 return r;
 461         }
 462
 463         return 0;
 464 }
 465
 466 static int add_priorities(sd_journal *j) {
 467         char match[] = "PRIORITY=0";
 468         int i, r;
 469
 470         assert(j);
 471
 472         if (arg_priorities == 0xFF)
 473                 return 0;
 474
 475         for (i = LOG_EMERG; i <= LOG_DEBUG; i++)
 476                 if (arg_priorities & (1 << i)) {
 477                         match[sizeof(match)-2] = '0' + i;
 478
 479                         log_info("adding match %s", match);
 480
 481                         r = sd_journal_add_match(j, match, strlen(match));
 482                         if (r < 0) {
 483                                 log_error("Failed to add match: %s", strerror(-r));
 484                                 return r;
 485                         }
 486                 }
 487
 488         return 0;
 489 }
 490
 491 static int setup_keys(void) {
 492 #ifdef HAVE_GCRYPT
 493         size_t mpk_size, seed_size, state_size, i;
 494         uint8_t *mpk, *seed, *state;
 495         ssize_t l;
 496         int fd = -1, r, attr = 0;
 497         sd_id128_t machine, boot;
 498         char *p = NULL, *k = NULL;
 499         struct FSSHeader h;
 500         uint64_t n;
 501
 502         r = sd_id128_get_machine(&machine);
 503         if (r < 0) {
 504                 log_error("Failed to get machine ID: %s", strerror(-r));
 505                 return r;
 506         }
 507
 508         r = sd_id128_get_boot(&boot);
 509         if (r < 0) {
 510                 log_error("Failed to get boot ID: %s", strerror(-r));
 511                 return r;
 512         }
 513
 514         if (asprintf(&p, "/var/log/journal/" SD_ID128_FORMAT_STR "/fss",
 515                      SD_ID128_FORMAT_VAL(machine)) < 0)
 516                 return log_oom();
 517
 518         if (access(p, F_OK) >= 0) {
 519                 log_error("Sealing key file %s exists already.", p);
 520                 r = -EEXIST;
 521                 goto finish;
 522         }
 523
 524         if (asprintf(&k, "/var/log/journal/" SD_ID128_FORMAT_STR "/fss.tmp.XXXXXX",
 525                      SD_ID128_FORMAT_VAL(machine)) < 0) {
 526                 r = log_oom();
 527                 goto finish;
 528         }
 529
 530         mpk_size = FSPRG_mskinbytes(FSPRG_RECOMMENDED_SECPAR);
 531         mpk = alloca(mpk_size);
 532
 533         seed_size = FSPRG_RECOMMENDED_SEEDLEN;
 534         seed = alloca(seed_size);
 535
 536         state_size = FSPRG_stateinbytes(FSPRG_RECOMMENDED_SECPAR);
 537         state = alloca(state_size);
 538
 539         fd = open("/dev/random", O_RDONLY|O_CLOEXEC|O_NOCTTY);
 540         if (fd < 0) {
 541                 log_error("Failed to open /dev/random: %m");
 542                 r = -errno;
 543                 goto finish;
 544         }
 545
 546         log_info("Generating seed...");
 547         l = loop_read(fd, seed, seed_size, true);
 548         if (l < 0 || (size_t) l != seed_size) {
 549                 log_error("Failed to read random seed: %s", strerror(EIO));
 550                 r = -EIO;
 551                 goto finish;
 552         }
 553
 554         log_info("Generating key pair...");
 555         FSPRG_GenMK(NULL, mpk, seed, seed_size, FSPRG_RECOMMENDED_SECPAR);
 556
 557         log_info("Generating sealing key...");
 558         FSPRG_GenState0(state, mpk, seed, seed_size);
 559
 560         assert(arg_interval > 0);
 561
 562         n = now(CLOCK_REALTIME);
 563         n /= arg_interval;
 564
 565         close_nointr_nofail(fd);
 566         fd = mkostemp(k, O_WRONLY|O_CLOEXEC|O_NOCTTY);
 567         if (fd < 0) {
 568                 log_error("Failed to open %s: %m", k);
 569                 r = -errno;
 570                 goto finish;
 571         }
 572
 573         /* Enable secure remove, exclusion from dump, synchronous
 574          * writing and in-place updating */
 575         if (ioctl(fd, FS_IOC_GETFLAGS, &attr) < 0)
 576                 log_warning("FS_IOC_GETFLAGS failed: %m");
 577
 578         attr |= FS_SECRM_FL|FS_NODUMP_FL|FS_SYNC_FL|FS_NOCOW_FL;
 579
 580         if (ioctl(fd, FS_IOC_SETFLAGS, &attr) < 0)
 581                 log_warning("FS_IOC_SETFLAGS failed: %m");
 582
 583         zero(h);
 584         memcpy(h.signature, "KSHHRHLP", 8);
 585         h.machine_id = machine;
 586         h.boot_id = boot;
 587         h.header_size = htole64(sizeof(h));
 588         h.start_usec = htole64(n * arg_interval);
 589         h.interval_usec = htole64(arg_interval);
 590         h.fsprg_secpar = htole16(FSPRG_RECOMMENDED_SECPAR);
 591         h.fsprg_state_size = htole64(state_size);
 592
 593         l = loop_write(fd, &h, sizeof(h), false);
 594         if (l < 0 || (size_t) l != sizeof(h)) {
 595                 log_error("Failed to write header: %s", strerror(EIO));
 596                 r = -EIO;
 597                 goto finish;
 598         }
 599
 600         l = loop_write(fd, state, state_size, false);
 601         if (l < 0 || (size_t) l != state_size) {
 602                 log_error("Failed to write state: %s", strerror(EIO));
 603                 r = -EIO;
 604                 goto finish;
 605         }
 606
 607         if (link(k, p) < 0) {
 608                 log_error("Failed to link file: %m");
 609                 r = -errno;
 610                 goto finish;
 611         }
 612
 613         if (isatty(STDOUT_FILENO)) {
 614                 fprintf(stderr,
 615                         "\n"
 616                         "The new key pair has been generated. The " ANSI_HIGHLIGHT_ON "secret sealing key" ANSI_HIGHLIGHT_OFF " has been written to\n"
 617                         "the following local file. This key file is automatically updated when the\n"
 618                         "sealing key is advanced. It should not be used on multiple hosts.\n"
 619                         "\n"
 620                         "\t%s\n"
 621                         "\n"
 622                         "Please write down the following " ANSI_HIGHLIGHT_ON "secret verification key" ANSI_HIGHLIGHT_OFF ". It should be stored\n"
 623                         "at a safe location and should not be saved locally on disk.\n"
 624                         "\n\t" ANSI_HIGHLIGHT_RED_ON, p);
 625                 fflush(stderr);
 626         }
 627         for (i = 0; i < seed_size; i++) {
 628                 if (i > 0 && i % 3 == 0)
 629                         putchar('-');
 630                 printf("%02x", ((uint8_t*) seed)[i]);
 631         }
 632
 633         printf("/%llx-%llx\n", (unsigned long long) n, (unsigned long long) arg_interval);
 634
 635         if (isatty(STDOUT_FILENO)) {
 636                 char tsb[FORMAT_TIMESPAN_MAX], *hn;
 637
 638                 fprintf(stderr,
 639                         ANSI_HIGHLIGHT_OFF "\n"
 640                         "The sealing key is automatically changed every %s.\n",
 641                         format_timespan(tsb, sizeof(tsb), arg_interval));
 642
 643                 hn = gethostname_malloc();
 644
 645                 if (hn) {
 646                         hostname_cleanup(hn);
 647                         fprintf(stderr, "\nThe keys have been generated for host %s/" SD_ID128_FORMAT_STR ".\n", hn, SD_ID128_FORMAT_VAL(machine));
 648                 } else
 649                         fprintf(stderr, "\nThe keys have been generated for host " SD_ID128_FORMAT_STR ".\n", SD_ID128_FORMAT_VAL(machine));
 650
 651 #ifdef HAVE_QRENCODE
 652                 /* If this is not an UTF-8 system don't print any QR codes */
 653                 setlocale(LC_CTYPE, "");
 654
 655                 if (streq_ptr(nl_langinfo(CODESET), "UTF-8")) {
 656                         fputs("\nTo transfer the verification key to your phone please scan the QR code below:\n\n", stderr);
 657                         print_qr_code(stderr, seed, seed_size, n, arg_interval, hn, machine);
 658                 }
 659 #endif
 660                 free(hn);
 661         }
 662
 663         r = 0;
 664
 665 finish:
 666         if (fd >= 0)
 667                 close_nointr_nofail(fd);
 668
 669         if (k) {
 670                 unlink(k);
 671                 free(k);
 672         }
 673
 674         free(p);
 675
 676         return r;
 677 #else
 678         log_error("Forward-secure sealing not available.");
 679         return -ENOTSUP;
 680 #endif
 681 }
 682
 683 static int verify(sd_journal *j) {
 684         int r = 0;
 685         Iterator i;
 686         JournalFile *f;
 687
 688         assert(j);
 689
 690         log_show_color(true);
 691
 692         HASHMAP_FOREACH(f, j->files, i) {
 693                 int k;
 694                 usec_t first, validated, last;
 695
 696 #ifdef HAVE_GCRYPT
 697                 if (!arg_verify_key && JOURNAL_HEADER_SEALED(f->header))
 698                         log_notice("Journal file %s has sealing enabled but verification key has not been passed using --verify-key=.", f->path);
 699 #endif
 700
 701                 k = journal_file_verify(f, arg_verify_key, &first, &validated, &last, true);
 702                 if (k == -EINVAL) {
 703                         /* If the key was invalid give up right-away. */
 704                         return k;
 705                 } else if (k < 0) {
 706                         log_warning("FAIL: %s (%s)", f->path, strerror(-k));
 707                         r = k;
 708                 } else {
 709                         char a[FORMAT_TIMESTAMP_MAX], b[FORMAT_TIMESTAMP_MAX], c[FORMAT_TIMESPAN_MAX];
 710                         log_info("PASS: %s", f->path);
 711
 712                         if (arg_verify_key && JOURNAL_HEADER_SEALED(f->header)) {
 713                                 if (validated > 0) {
 714                                         log_info("=> Validated from %s to %s, final %s entries not sealed.",
 715                                                  format_timestamp(a, sizeof(a), first),
 716                                                  format_timestamp(b, sizeof(b), validated),
 717                                                  format_timespan(c, sizeof(c), last > validated ? last - validated : 0));
 718                                 } else if (last > 0)
 719                                         log_info("=> No sealing yet, %s of entries not sealed.",
 720                                                  format_timespan(c, sizeof(c), last - first));
 721                                 else
 722                                         log_info("=> No sealing yet, no entries in file.");
 723                         }
 724                 }
 725         }
 726
 727         return r;
 728 }
 729
 730 int main(int argc, char *argv[]) {
 731         int r;
 732         sd_journal *j = NULL;
 733         bool need_seek = false;
 734         sd_id128_t previous_boot_id;
 735         bool previous_boot_id_valid = false;
 736         bool have_pager;
 737
 738         log_parse_environment();
 739         log_open();
 740
 741         r = parse_argv(argc, argv);
 742         if (r <= 0)
 743                 goto finish;
 744
 745         if (arg_action == ACTION_NEW_ID128) {
 746                 r = generate_new_id128();
 747                 goto finish;
 748         }
 749
 750         if (arg_action == ACTION_SETUP_KEYS) {
 751                 r = setup_keys();
 752                 goto finish;
 753         }
 754
 755         if (arg_directory)
 756                 r = sd_journal_open_directory(&j, arg_directory, 0);
 757         else
 758                 r = sd_journal_open(&j, arg_merge ? 0 : SD_JOURNAL_LOCAL_ONLY);
 759
 760         if (r < 0) {
 761                 log_error("Failed to open journal: %s", strerror(-r));
 762                 goto finish;
 763         }
 764
 765         if (arg_action == ACTION_VERIFY) {
 766                 r = verify(j);
 767                 goto finish;
 768         }
 769
 770         if (arg_action == ACTION_PRINT_HEADER) {
 771                 journal_print_header(j);
 772                 r = 0;
 773                 goto finish;
 774         }
 775
 776         if (arg_action == ACTION_DISK_USAGE) {
 777                 uint64_t bytes;
 778                 char sbytes[FORMAT_BYTES_MAX];
 779
 780                 r = sd_journal_get_usage(j, &bytes);
 781                 if (r < 0)
 782                         goto finish;
 783
 784                 printf("Journals take up %s on disk.\n", format_bytes(sbytes, sizeof(sbytes), bytes));
 785                 r = 0;
 786                 goto finish;
 787         }
 788
 789 #ifdef HAVE_ACL
 790         if (access("/var/log/journal", F_OK) < 0 && geteuid() != 0 && in_group("adm") <= 0) {
 791                 log_error("Unprivileged users can't see messages unless persistent log storage is enabled. Users in the group 'adm' can always see messages.");
 792                 r = -EACCES;
 793                 goto finish;
 794         }
 795
 796         if (!arg_quiet && geteuid() != 0 && in_group("adm") <= 0)
 797                 log_warning("Showing user generated messages only. Users in the group 'adm' can see all messages. Pass -q to turn this notice off.");
 798 #else
 799         if (geteuid() != 0 && in_group("adm") <= 0) {
 800                 log_error("No access to messages. Only users in the group 'adm' can see messages.");
 801                 r = -EACCES;
 802                 goto finish;
 803         }
 804 #endif
 805
 806         r = add_this_boot(j);
 807         if (r < 0)
 808                 goto finish;
 809
 810         r = add_matches(j, argv + optind);
 811         if (r < 0)
 812                 goto finish;
 813
 814         r = add_priorities(j);
 815         if (r < 0)
 816                 goto finish;
 817
 818         if (!arg_quiet) {
 819                 usec_t start, end;
 820                 char start_buf[FORMAT_TIMESTAMP_MAX], end_buf[FORMAT_TIMESTAMP_MAX];
 821
 822                 r = sd_journal_get_cutoff_realtime_usec(j, &start, &end);
 823                 if (r < 0) {
 824                         log_error("Failed to get cutoff: %s", strerror(-r));
 825                         goto finish;
 826                 }
 827
 828                 if (r > 0) {
 829                         if (arg_follow)
 830                                 printf("Logs begin at %s.\n", format_timestamp(start_buf, sizeof(start_buf), start));
 831                         else
 832                                 printf("Logs begin at %s, end at %s.\n",
 833                                        format_timestamp(start_buf, sizeof(start_buf), start),
 834                                        format_timestamp(end_buf, sizeof(end_buf), end));
 835                 }
 836         }
 837
 838         if (arg_cursor) {
 839                 r = sd_journal_seek_cursor(j, arg_cursor);
 840                 if (r < 0) {
 841                         log_error("Failed to seek to cursor: %s", strerror(-r));
 842                         goto finish;
 843                 }
 844
 845                 r = sd_journal_next(j);
 846
 847         } else if (arg_lines >= 0) {
 848                 r = sd_journal_seek_tail(j);
 849                 if (r < 0) {
 850                         log_error("Failed to seek to tail: %s", strerror(-r));
 851                         goto finish;
 852                 }
 853
 854                 r = sd_journal_previous_skip(j, arg_lines);
 855
 856         } else {
 857                 r = sd_journal_seek_head(j);
 858                 if (r < 0) {
 859                         log_error("Failed to seek to head: %s", strerror(-r));
 860                         goto finish;
 861                 }
 862
 863                 r = sd_journal_next(j);
 864         }
 865
 866         if (r < 0) {
 867                 log_error("Failed to iterate through journal: %s", strerror(-r));
 868                 goto finish;
 869         }
 870
 871         on_tty();
 872         have_pager = !arg_no_pager && !arg_follow && pager_open();
 873
 874         for (;;) {
 875                 for (;;) {
 876                         int flags =
 877                                 arg_show_all * OUTPUT_SHOW_ALL |
 878                                 have_pager * OUTPUT_FULL_WIDTH |
 879                                 on_tty() * OUTPUT_COLOR;
 880
 881                         if (need_seek) {
 882                                 r = sd_journal_next(j);
 883                                 if (r < 0) {
 884                                         log_error("Failed to iterate through journal: %s", strerror(-r));
 885                                         goto finish;
 886                                 }
 887                         }
 888
 889                         if (r == 0)
 890                                 break;
 891
 892                         if (!arg_merge) {
 893                                 sd_id128_t boot_id;
 894
 895                                 r = sd_journal_get_monotonic_usec(j, NULL, &boot_id);
 896                                 if (r >= 0) {
 897                                         if (previous_boot_id_valid &&
 898                                             !sd_id128_equal(boot_id, previous_boot_id))
 899                                                 printf(ANSI_HIGHLIGHT_ON "----- Reboot -----" ANSI_HIGHLIGHT_OFF "\n");
 900
 901                                         previous_boot_id = boot_id;
 902                                         previous_boot_id_valid = true;
 903                                 }
 904                         }
 905
 906                         r = output_journal(stdout, j, arg_output, 0, flags);
 907                         if (r < 0)
 908                                 goto finish;
 909
 910                         need_seek = true;
 911                 }
 912
 913                 if (!arg_follow)
 914                         break;
 915
 916                 r = sd_journal_wait(j, (uint64_t) -1);
 917                 if (r < 0) {
 918                         log_error("Couldn't wait for journal event: %s", strerror(-r));
 919                         goto finish;
 920                 }
 921         }
 922
 923 finish:
 924         if (j)
 925                 sd_journal_close(j);
 926
 927         pager_close();
 928
 929         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 930 }