src/journal-remote/journal-upload.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <curl/curl.h>
   4 #include <fcntl.h>
   5 #include <getopt.h>
   6 #include <stdio.h>
   7 #include <sys/stat.h>
   8
   9 #include "sd-daemon.h"
  10
  11 #include "alloc-util.h"
  12 #include "conf-parser.h"
  13 #include "def.h"
  14 #include "env-file.h"
  15 #include "fd-util.h"
  16 #include "fileio.h"
  17 #include "format-util.h"
  18 #include "glob-util.h"
  19 #include "journal-upload.h"
  20 #include "log.h"
  21 #include "mkdir.h"
  22 #include "parse-util.h"
  23 #include "pretty-print.h"
  24 #include "process-util.h"
  25 #include "rlimit-util.h"
  26 #include "sigbus.h"
  27 #include "signal-util.h"
  28 #include "string-util.h"
  29 #include "strv.h"
  30 #include "tmpfile-util.h"
  31 #include "util.h"
  32
  33 #define PRIV_KEY_FILE CERTIFICATE_ROOT "/private/journal-upload.pem"
  34 #define CERT_FILE     CERTIFICATE_ROOT "/certs/journal-upload.pem"
  35 #define TRUST_FILE    CERTIFICATE_ROOT "/ca/trusted.pem"
  36 #define DEFAULT_PORT  19532
  37
  38 static const char* arg_url = NULL;
  39 static const char *arg_key = NULL;
  40 static const char *arg_cert = NULL;
  41 static const char *arg_trust = NULL;
  42 static const char *arg_directory = NULL;
  43 static char **arg_file = NULL;
  44 static const char *arg_cursor = NULL;
  45 static bool arg_after_cursor = false;
  46 static int arg_journal_type = 0;
  47 static const char *arg_machine = NULL;
  48 static bool arg_merge = false;
  49 static int arg_follow = -1;
  50 static const char *arg_save_state = NULL;
  51
  52 static void close_fd_input(Uploader *u);
  53
  54 #define SERVER_ANSWER_KEEP 2048
  55
  56 #define STATE_FILE "/var/lib/systemd/journal-upload/state"
  57
  58 #define easy_setopt(curl, opt, value, level, cmd)                       \
  59         do {                                                            \
  60                 code = curl_easy_setopt(curl, opt, value);              \
  61                 if (code) {                                             \
  62                         log_full(level,                                 \
  63                                  "curl_easy_setopt " #opt " failed: %s", \
  64                                   curl_easy_strerror(code));            \
  65                         cmd;                                            \
  66                 }                                                       \
  67         } while (0)
  68
  69 static size_t output_callback(char *buf,
  70                               size_t size,
  71                               size_t nmemb,
  72                               void *userp) {
  73         Uploader *u = userp;
  74
  75         assert(u);
  76
  77         log_debug("The server answers (%zu bytes): %.*s",
  78                   size*nmemb, (int)(size*nmemb), buf);
  79
  80         if (nmemb && !u->answer) {
  81                 u->answer = strndup(buf, size*nmemb);
  82                 if (!u->answer)
  83                         log_warning("Failed to store server answer (%zu bytes): out of memory", size*nmemb);
  84         }
  85
  86         return size * nmemb;
  87 }
  88
  89 static int check_cursor_updating(Uploader *u) {
  90         _cleanup_free_ char *temp_path = NULL;
  91         _cleanup_fclose_ FILE *f = NULL;
  92         int r;
  93
  94         if (!u->state_file)
  95                 return 0;
  96
  97         r = mkdir_parents(u->state_file, 0755);
  98         if (r < 0)
  99                 return log_error_errno(r, "Cannot create parent directory of state file %s: %m",
 100                                        u->state_file);
 101
 102         r = fopen_temporary(u->state_file, &f, &temp_path);
 103         if (r < 0)
 104                 return log_error_errno(r, "Cannot save state to %s: %m",
 105                                        u->state_file);
 106         unlink(temp_path);
 107
 108         return 0;
 109 }
 110
 111 static int update_cursor_state(Uploader *u) {
 112         _cleanup_free_ char *temp_path = NULL;
 113         _cleanup_fclose_ FILE *f = NULL;
 114         int r;
 115
 116         if (!u->state_file || !u->last_cursor)
 117                 return 0;
 118
 119         r = fopen_temporary(u->state_file, &f, &temp_path);
 120         if (r < 0)
 121                 goto fail;
 122
 123         fprintf(f,
 124                 "# This is private data. Do not parse.\n"
 125                 "LAST_CURSOR=%s\n",
 126                 u->last_cursor);
 127
 128         r = fflush_and_check(f);
 129         if (r < 0)
 130                 goto fail;
 131
 132         if (rename(temp_path, u->state_file) < 0) {
 133                 r = -errno;
 134                 goto fail;
 135         }
 136
 137         return 0;
 138
 139 fail:
 140         if (temp_path)
 141                 (void) unlink(temp_path);
 142
 143         (void) unlink(u->state_file);
 144
 145         return log_error_errno(r, "Failed to save state %s: %m", u->state_file);
 146 }
 147
 148 static int load_cursor_state(Uploader *u) {
 149         int r;
 150
 151         if (!u->state_file)
 152                 return 0;
 153
 154         r = parse_env_file(NULL, u->state_file, "LAST_CURSOR", &u->last_cursor);
 155         if (r == -ENOENT)
 156                 log_debug("State file %s is not present.", u->state_file);
 157         else if (r < 0)
 158                 return log_error_errno(r, "Failed to read state file %s: %m",
 159                                        u->state_file);
 160         else
 161                 log_debug("Last cursor was %s", u->last_cursor);
 162
 163         return 0;
 164 }
 165
 166 int start_upload(Uploader *u,
 167                  size_t (*input_callback)(void *ptr,
 168                                           size_t size,
 169                                           size_t nmemb,
 170                                           void *userdata),
 171                  void *data) {
 172         CURLcode code;
 173
 174         assert(u);
 175         assert(input_callback);
 176
 177         if (!u->header) {
 178                 struct curl_slist *h;
 179
 180                 h = curl_slist_append(NULL, "Content-Type: application/vnd.fdo.journal");
 181                 if (!h)
 182                         return log_oom();
 183
 184                 h = curl_slist_append(h, "Transfer-Encoding: chunked");
 185                 if (!h) {
 186                         curl_slist_free_all(h);
 187                         return log_oom();
 188                 }
 189
 190                 h = curl_slist_append(h, "Accept: text/plain");
 191                 if (!h) {
 192                         curl_slist_free_all(h);
 193                         return log_oom();
 194                 }
 195
 196                 u->header = h;
 197         }
 198
 199         if (!u->easy) {
 200                 CURL *curl;
 201
 202                 curl = curl_easy_init();
 203                 if (!curl)
 204                         return log_error_errno(SYNTHETIC_ERRNO(ENOSR),
 205                                                "Call to curl_easy_init failed.");
 206
 207                 /* tell it to POST to the URL */
 208                 easy_setopt(curl, CURLOPT_POST, 1L,
 209                             LOG_ERR, return -EXFULL);
 210
 211                 easy_setopt(curl, CURLOPT_ERRORBUFFER, u->error,
 212                             LOG_ERR, return -EXFULL);
 213
 214                 /* set where to write to */
 215                 easy_setopt(curl, CURLOPT_WRITEFUNCTION, output_callback,
 216                             LOG_ERR, return -EXFULL);
 217
 218                 easy_setopt(curl, CURLOPT_WRITEDATA, data,
 219                             LOG_ERR, return -EXFULL);
 220
 221                 /* set where to read from */
 222                 easy_setopt(curl, CURLOPT_READFUNCTION, input_callback,
 223                             LOG_ERR, return -EXFULL);
 224
 225                 easy_setopt(curl, CURLOPT_READDATA, data,
 226                             LOG_ERR, return -EXFULL);
 227
 228                 /* use our special own mime type and chunked transfer */
 229                 easy_setopt(curl, CURLOPT_HTTPHEADER, u->header,
 230                             LOG_ERR, return -EXFULL);
 231
 232                 if (DEBUG_LOGGING)
 233                         /* enable verbose for easier tracing */
 234                         easy_setopt(curl, CURLOPT_VERBOSE, 1L, LOG_WARNING, );
 235
 236                 easy_setopt(curl, CURLOPT_USERAGENT,
 237                             "systemd-journal-upload " PACKAGE_STRING,
 238                             LOG_WARNING, );
 239
 240                 if (arg_key || startswith(u->url, "https://")) {
 241                         easy_setopt(curl, CURLOPT_SSLKEY, arg_key ?: PRIV_KEY_FILE,
 242                                     LOG_ERR, return -EXFULL);
 243                         easy_setopt(curl, CURLOPT_SSLCERT, arg_cert ?: CERT_FILE,
 244                                     LOG_ERR, return -EXFULL);
 245                 }
 246
 247                 if (streq_ptr(arg_trust, "all"))
 248                         easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0,
 249                                     LOG_ERR, return -EUCLEAN);
 250                 else if (arg_trust || startswith(u->url, "https://"))
 251                         easy_setopt(curl, CURLOPT_CAINFO, arg_trust ?: TRUST_FILE,
 252                                     LOG_ERR, return -EXFULL);
 253
 254                 if (arg_key || arg_trust)
 255                         easy_setopt(curl, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1,
 256                                     LOG_WARNING, );
 257
 258                 u->easy = curl;
 259         } else {
 260                 /* truncate the potential old error message */
 261                 u->error[0] = '\0';
 262
 263                 free(u->answer);
 264                 u->answer = 0;
 265         }
 266
 267         /* upload to this place */
 268         code = curl_easy_setopt(u->easy, CURLOPT_URL, u->url);
 269         if (code)
 270                 return log_error_errno(SYNTHETIC_ERRNO(EXFULL),
 271                                        "curl_easy_setopt CURLOPT_URL failed: %s",
 272                                        curl_easy_strerror(code));
 273
 274         u->uploading = true;
 275
 276         return 0;
 277 }
 278
 279 static size_t fd_input_callback(void *buf, size_t size, size_t nmemb, void *userp) {
 280         Uploader *u = userp;
 281         ssize_t n;
 282
 283         assert(u);
 284         assert(nmemb < SSIZE_MAX / size);
 285
 286         if (u->input < 0)
 287                 return 0;
 288
 289         assert(!size_multiply_overflow(size, nmemb));
 290
 291         n = read(u->input, buf, size * nmemb);
 292         log_debug("%s: allowed %zu, read %zd", __func__, size*nmemb, n);
 293         if (n > 0)
 294                 return n;
 295
 296         u->uploading = false;
 297         if (n < 0) {
 298                 log_error_errno(errno, "Aborting transfer after read error on input: %m.");
 299                 return CURL_READFUNC_ABORT;
 300         }
 301
 302         log_debug("Reached EOF");
 303         close_fd_input(u);
 304         return 0;
 305 }
 306
 307 static void close_fd_input(Uploader *u) {
 308         assert(u);
 309
 310         u->input = safe_close(u->input);
 311         u->timeout = 0;
 312 }
 313
 314 static int dispatch_fd_input(sd_event_source *event,
 315                              int fd,
 316                              uint32_t revents,
 317                              void *userp) {
 318         Uploader *u = userp;
 319
 320         assert(u);
 321         assert(fd >= 0);
 322
 323         if (revents & EPOLLHUP) {
 324                 log_debug("Received HUP");
 325                 close_fd_input(u);
 326                 return 0;
 327         }
 328
 329         if (!(revents & EPOLLIN)) {
 330                 log_warning("Unexpected poll event %"PRIu32".", revents);
 331                 return -EINVAL;
 332         }
 333
 334         if (u->uploading) {
 335                 log_warning("dispatch_fd_input called when uploading, ignoring.");
 336                 return 0;
 337         }
 338
 339         return start_upload(u, fd_input_callback, u);
 340 }
 341
 342 static int open_file_for_upload(Uploader *u, const char *filename) {
 343         int fd, r = 0;
 344
 345         if (streq(filename, "-"))
 346                 fd = STDIN_FILENO;
 347         else {
 348                 fd = open(filename, O_RDONLY|O_CLOEXEC|O_NOCTTY);
 349                 if (fd < 0)
 350                         return log_error_errno(errno, "Failed to open %s: %m", filename);
 351         }
 352
 353         u->input = fd;
 354
 355         if (arg_follow) {
 356                 r = sd_event_add_io(u->events, &u->input_event,
 357                                     fd, EPOLLIN, dispatch_fd_input, u);
 358                 if (r < 0) {
 359                         if (r != -EPERM || arg_follow > 0)
 360                                 return log_error_errno(r, "Failed to register input event: %m");
 361
 362                         /* Normal files should just be consumed without polling. */
 363                         r = start_upload(u, fd_input_callback, u);
 364                 }
 365         }
 366
 367         return r;
 368 }
 369
 370 static int dispatch_sigterm(sd_event_source *event,
 371                             const struct signalfd_siginfo *si,
 372                             void *userdata) {
 373         Uploader *u = userdata;
 374
 375         assert(u);
 376
 377         log_received_signal(LOG_INFO, si);
 378
 379         close_fd_input(u);
 380         close_journal_input(u);
 381
 382         sd_event_exit(u->events, 0);
 383         return 0;
 384 }
 385
 386 static int setup_signals(Uploader *u) {
 387         int r;
 388
 389         assert(u);
 390
 391         assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, -1) >= 0);
 392
 393         r = sd_event_add_signal(u->events, &u->sigterm_event, SIGTERM, dispatch_sigterm, u);
 394         if (r < 0)
 395                 return r;
 396
 397         r = sd_event_add_signal(u->events, &u->sigint_event, SIGINT, dispatch_sigterm, u);
 398         if (r < 0)
 399                 return r;
 400
 401         return 0;
 402 }
 403
 404 static int setup_uploader(Uploader *u, const char *url, const char *state_file) {
 405         int r;
 406         const char *host, *proto = "";
 407
 408         assert(u);
 409         assert(url);
 410
 411         *u = (Uploader) {
 412                 .input = -1
 413         };
 414
 415         host = STARTSWITH_SET(url, "http://", "https://");
 416         if (!host) {
 417                 host = url;
 418                 proto = "https://";
 419         }
 420
 421         if (strchr(host, ':'))
 422                 u->url = strjoin(proto, url, "/upload");
 423         else {
 424                 char *t;
 425                 size_t x;
 426
 427                 t = strdupa(url);
 428                 x = strlen(t);
 429                 while (x > 0 && t[x - 1] == '/')
 430                         t[x - 1] = '\0';
 431
 432                 u->url = strjoin(proto, t, ":" STRINGIFY(DEFAULT_PORT), "/upload");
 433         }
 434         if (!u->url)
 435                 return log_oom();
 436
 437         u->state_file = state_file;
 438
 439         r = sd_event_default(&u->events);
 440         if (r < 0)
 441                 return log_error_errno(r, "sd_event_default failed: %m");
 442
 443         r = setup_signals(u);
 444         if (r < 0)
 445                 return log_error_errno(r, "Failed to set up signals: %m");
 446
 447         (void) sd_watchdog_enabled(false, &u->watchdog_usec);
 448
 449         return load_cursor_state(u);
 450 }
 451
 452 static void destroy_uploader(Uploader *u) {
 453         assert(u);
 454
 455         curl_easy_cleanup(u->easy);
 456         curl_slist_free_all(u->header);
 457         free(u->answer);
 458
 459         free(u->last_cursor);
 460         free(u->current_cursor);
 461
 462         free(u->url);
 463
 464         u->input_event = sd_event_source_unref(u->input_event);
 465
 466         close_fd_input(u);
 467         close_journal_input(u);
 468
 469         sd_event_source_unref(u->sigterm_event);
 470         sd_event_source_unref(u->sigint_event);
 471         sd_event_unref(u->events);
 472 }
 473
 474 static int perform_upload(Uploader *u) {
 475         CURLcode code;
 476         long status;
 477
 478         assert(u);
 479
 480         u->watchdog_timestamp = now(CLOCK_MONOTONIC);
 481         code = curl_easy_perform(u->easy);
 482         if (code) {
 483                 if (u->error[0])
 484                         log_error("Upload to %s failed: %.*s",
 485                                   u->url, (int) sizeof(u->error), u->error);
 486                 else
 487                         log_error("Upload to %s failed: %s",
 488                                   u->url, curl_easy_strerror(code));
 489                 return -EIO;
 490         }
 491
 492         code = curl_easy_getinfo(u->easy, CURLINFO_RESPONSE_CODE, &status);
 493         if (code)
 494                 return log_error_errno(SYNTHETIC_ERRNO(EUCLEAN),
 495                                        "Failed to retrieve response code: %s",
 496                                        curl_easy_strerror(code));
 497
 498         if (status >= 300)
 499                 return log_error_errno(SYNTHETIC_ERRNO(EIO),
 500                                        "Upload to %s failed with code %ld: %s",
 501                                        u->url, status, strna(u->answer));
 502         else if (status < 200)
 503                 return log_error_errno(SYNTHETIC_ERRNO(EIO),
 504                                        "Upload to %s finished with unexpected code %ld: %s",
 505                                        u->url, status, strna(u->answer));
 506         else
 507                 log_debug("Upload finished successfully with code %ld: %s",
 508                           status, strna(u->answer));
 509
 510         free_and_replace(u->last_cursor, u->current_cursor);
 511
 512         return update_cursor_state(u);
 513 }
 514
 515 static int parse_config(void) {
 516         const ConfigTableItem items[] = {
 517                 { "Upload",  "URL",                    config_parse_string, 0, &arg_url    },
 518                 { "Upload",  "ServerKeyFile",          config_parse_path,   0, &arg_key    },
 519                 { "Upload",  "ServerCertificateFile",  config_parse_path,   0, &arg_cert   },
 520                 { "Upload",  "TrustedCertificateFile", config_parse_path,   0, &arg_trust  },
 521                 {}};
 522
 523         return config_parse_many_nulstr(PKGSYSCONFDIR "/journal-upload.conf",
 524                                         CONF_PATHS_NULSTR("systemd/journal-upload.conf.d"),
 525                                         "Upload\0", config_item_table_lookup, items,
 526                                         CONFIG_PARSE_WARN, NULL);
 527 }
 528
 529 static int help(void) {
 530         _cleanup_free_ char *link = NULL;
 531         int r;
 532
 533         r = terminal_urlify_man("systemd-journal-upload.service", "8", &link);
 534         if (r < 0)
 535                 return log_oom();
 536
 537         printf("%s -u URL {FILE|-}...\n\n"
 538                "Upload journal events to a remote server.\n\n"
 539                "  -h --help                 Show this help\n"
 540                "     --version              Show package version\n"
 541                "  -u --url=URL              Upload to this address (default port "
 542                                             STRINGIFY(DEFAULT_PORT) ")\n"
 543                "     --key=FILENAME         Specify key in PEM format (default:\n"
 544                "                            \"" PRIV_KEY_FILE "\")\n"
 545                "     --cert=FILENAME        Specify certificate in PEM format (default:\n"
 546                "                            \"" CERT_FILE "\")\n"
 547                "     --trust=FILENAME|all   Specify CA certificate or disable checking (default:\n"
 548                "                            \"" TRUST_FILE "\")\n"
 549                "     --system               Use the system journal\n"
 550                "     --user                 Use the user journal for the current user\n"
 551                "  -m --merge                Use  all available journals\n"
 552                "  -M --machine=CONTAINER    Operate on local container\n"
 553                "  -D --directory=PATH       Use journal files from directory\n"
 554                "     --file=PATH            Use this journal file\n"
 555                "     --cursor=CURSOR        Start at the specified cursor\n"
 556                "     --after-cursor=CURSOR  Start after the specified cursor\n"
 557                "     --follow[=BOOL]        Do [not] wait for input\n"
 558                "     --save-state[=FILE]    Save uploaded cursors (default \n"
 559                "                            " STATE_FILE ")\n"
 560                "\nSee the %s for details.\n"
 561                , program_invocation_short_name
 562                , link
 563         );
 564
 565         return 0;
 566 }
 567
 568 static int parse_argv(int argc, char *argv[]) {
 569         enum {
 570                 ARG_VERSION = 0x100,
 571                 ARG_KEY,
 572                 ARG_CERT,
 573                 ARG_TRUST,
 574                 ARG_USER,
 575                 ARG_SYSTEM,
 576                 ARG_FILE,
 577                 ARG_CURSOR,
 578                 ARG_AFTER_CURSOR,
 579                 ARG_FOLLOW,
 580                 ARG_SAVE_STATE,
 581         };
 582
 583         static const struct option options[] = {
 584                 { "help",         no_argument,       NULL, 'h'                },
 585                 { "version",      no_argument,       NULL, ARG_VERSION        },
 586                 { "url",          required_argument, NULL, 'u'                },
 587                 { "key",          required_argument, NULL, ARG_KEY            },
 588                 { "cert",         required_argument, NULL, ARG_CERT           },
 589                 { "trust",        required_argument, NULL, ARG_TRUST          },
 590                 { "system",       no_argument,       NULL, ARG_SYSTEM         },
 591                 { "user",         no_argument,       NULL, ARG_USER           },
 592                 { "merge",        no_argument,       NULL, 'm'                },
 593                 { "machine",      required_argument, NULL, 'M'                },
 594                 { "directory",    required_argument, NULL, 'D'                },
 595                 { "file",         required_argument, NULL, ARG_FILE           },
 596                 { "cursor",       required_argument, NULL, ARG_CURSOR         },
 597                 { "after-cursor", required_argument, NULL, ARG_AFTER_CURSOR   },
 598                 { "follow",       optional_argument, NULL, ARG_FOLLOW         },
 599                 { "save-state",   optional_argument, NULL, ARG_SAVE_STATE     },
 600                 {}
 601         };
 602
 603         int c, r;
 604
 605         assert(argc >= 0);
 606         assert(argv);
 607
 608         opterr = 0;
 609
 610         while ((c = getopt_long(argc, argv, "hu:mM:D:", options, NULL)) >= 0)
 611                 switch(c) {
 612                 case 'h':
 613                         return help();
 614
 615                 case ARG_VERSION:
 616                         return version();
 617
 618                 case 'u':
 619                         if (arg_url)
 620                                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 621                                                        "cannot use more than one --url");
 622
 623                         arg_url = optarg;
 624                         break;
 625
 626                 case ARG_KEY:
 627                         if (arg_key)
 628                                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 629                                                        "cannot use more than one --key");
 630
 631                         arg_key = optarg;
 632                         break;
 633
 634                 case ARG_CERT:
 635                         if (arg_cert)
 636                                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 637                                                        "cannot use more than one --cert");
 638
 639                         arg_cert = optarg;
 640                         break;
 641
 642                 case ARG_TRUST:
 643                         if (arg_trust)
 644                                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 645                                                        "cannot use more than one --trust");
 646
 647                         arg_trust = optarg;
 648                         break;
 649
 650                 case ARG_SYSTEM:
 651                         arg_journal_type |= SD_JOURNAL_SYSTEM;
 652                         break;
 653
 654                 case ARG_USER:
 655                         arg_journal_type |= SD_JOURNAL_CURRENT_USER;
 656                         break;
 657
 658                 case 'm':
 659                         arg_merge = true;
 660                         break;
 661
 662                 case 'M':
 663                         if (arg_machine)
 664                                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 665                                                        "cannot use more than one --machine/-M");
 666
 667                         arg_machine = optarg;
 668                         break;
 669
 670                 case 'D':
 671                         if (arg_directory)
 672                                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 673                                                        "cannot use more than one --directory/-D");
 674
 675                         arg_directory = optarg;
 676                         break;
 677
 678                 case ARG_FILE:
 679                         r = glob_extend(&arg_file, optarg);
 680                         if (r < 0)
 681                                 return log_error_errno(r, "Failed to add paths: %m");
 682                         break;
 683
 684                 case ARG_CURSOR:
 685                         if (arg_cursor)
 686                                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 687                                                        "cannot use more than one --cursor/--after-cursor");
 688
 689                         arg_cursor = optarg;
 690                         break;
 691
 692                 case ARG_AFTER_CURSOR:
 693                         if (arg_cursor)
 694                                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 695                                                        "cannot use more than one --cursor/--after-cursor");
 696
 697                         arg_cursor = optarg;
 698                         arg_after_cursor = true;
 699                         break;
 700
 701                 case ARG_FOLLOW:
 702                         if (optarg) {
 703                                 r = parse_boolean(optarg);
 704                                 if (r < 0)
 705                                         return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 706                                                                "Failed to parse --follow= parameter.");
 707
 708                                 arg_follow = !!r;
 709                         } else
 710                                 arg_follow = true;
 711
 712                         break;
 713
 714                 case ARG_SAVE_STATE:
 715                         arg_save_state = optarg ?: STATE_FILE;
 716                         break;
 717
 718                 case '?':
 719                         return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 720                                                "Unknown option %s.",
 721                                                argv[optind - 1]);
 722
 723                 case ':':
 724                         return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 725                                                "Missing argument to %s.",
 726                                                argv[optind - 1]);
 727
 728                 default:
 729                         assert_not_reached("Unhandled option code.");
 730                 }
 731
 732         if (!arg_url)
 733                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 734                                        "Required --url/-u option missing.");
 735
 736         if (!!arg_key != !!arg_cert)
 737                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 738                                        "Options --key and --cert must be used together.");
 739
 740         if (optind < argc && (arg_directory || arg_file || arg_machine || arg_journal_type))
 741                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 742                                        "Input arguments make no sense with journal input.");
 743
 744         return 1;
 745 }
 746
 747 static int open_journal(sd_journal **j) {
 748         int r;
 749
 750         if (arg_directory)
 751                 r = sd_journal_open_directory(j, arg_directory, arg_journal_type);
 752         else if (arg_file)
 753                 r = sd_journal_open_files(j, (const char**) arg_file, 0);
 754         else if (arg_machine)
 755                 r = sd_journal_open_container(j, arg_machine, 0);
 756         else
 757                 r = sd_journal_open(j, !arg_merge*SD_JOURNAL_LOCAL_ONLY + arg_journal_type);
 758         if (r < 0)
 759                 log_error_errno(r, "Failed to open %s: %m",
 760                                 arg_directory ? arg_directory : arg_file ? "files" : "journal");
 761         return r;
 762 }
 763
 764 int main(int argc, char **argv) {
 765         Uploader u;
 766         int r;
 767         bool use_journal;
 768
 769         log_show_color(true);
 770         log_parse_environment();
 771
 772         /* The journal merging logic potentially needs a lot of fds. */
 773         (void) rlimit_nofile_bump(HIGH_RLIMIT_NOFILE);
 774
 775         r = parse_config();
 776         if (r < 0)
 777                 goto finish;
 778
 779         r = parse_argv(argc, argv);
 780         if (r <= 0)
 781                 goto finish;
 782
 783         sigbus_install();
 784
 785         r = setup_uploader(&u, arg_url, arg_save_state);
 786         if (r < 0)
 787                 goto cleanup;
 788
 789         sd_event_set_watchdog(u.events, true);
 790
 791         r = check_cursor_updating(&u);
 792         if (r < 0)
 793                 goto cleanup;
 794
 795         log_debug("%s running as pid "PID_FMT,
 796                   program_invocation_short_name, getpid_cached());
 797
 798         use_journal = optind >= argc;
 799         if (use_journal) {
 800                 sd_journal *j;
 801                 r = open_journal(&j);
 802                 if (r < 0)
 803                         goto finish;
 804                 r = open_journal_for_upload(&u, j,
 805                                             arg_cursor ?: u.last_cursor,
 806                                             arg_cursor ? arg_after_cursor : true,
 807                                             !!arg_follow);
 808                 if (r < 0)
 809                         goto finish;
 810         }
 811
 812         sd_notify(false,
 813                   "READY=1\n"
 814                   "STATUS=Processing input...");
 815
 816         for (;;) {
 817                 r = sd_event_get_state(u.events);
 818                 if (r < 0)
 819                         break;
 820                 if (r == SD_EVENT_FINISHED)
 821                         break;
 822
 823                 if (use_journal) {
 824                         if (!u.journal)
 825                                 break;
 826
 827                         r = check_journal_input(&u);
 828                 } else if (u.input < 0 && !use_journal) {
 829                         if (optind >= argc)
 830                                 break;
 831
 832                         log_debug("Using %s as input.", argv[optind]);
 833                         r = open_file_for_upload(&u, argv[optind++]);
 834                 }
 835                 if (r < 0)
 836                         goto cleanup;
 837
 838                 if (u.uploading) {
 839                         r = perform_upload(&u);
 840                         if (r < 0)
 841                                 break;
 842                 }
 843
 844                 r = sd_event_run(u.events, u.timeout);
 845                 if (r < 0) {
 846                         log_error_errno(r, "Failed to run event loop: %m");
 847                         break;
 848                 }
 849         }
 850
 851 cleanup:
 852         sd_notify(false,
 853                   "STOPPING=1\n"
 854                   "STATUS=Shutting down...");
 855
 856         destroy_uploader(&u);
 857
 858 finish:
 859         return r >= 0 ? EXIT_SUCCESS : EXIT_FAILURE;
 860 }