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 "fd-util.h"
  15 #include "fileio.h"
  16 #include "format-util.h"
  17 #include "glob-util.h"
  18 #include "journal-upload.h"
  19 #include "log.h"
  20 #include "mkdir.h"
  21 #include "parse-util.h"
  22 #include "process-util.h"
  23 #include "rlimit-util.h"
  24 #include "sigbus.h"
  25 #include "signal-util.h"
  26 #include "string-util.h"
  27 #include "terminal-util.h"
  28 #include "util.h"
  29
  30 #define PRIV_KEY_FILE CERTIFICATE_ROOT "/private/journal-upload.pem"
  31 #define CERT_FILE     CERTIFICATE_ROOT "/certs/journal-upload.pem"
  32 #define TRUST_FILE    CERTIFICATE_ROOT "/ca/trusted.pem"
  33 #define DEFAULT_PORT  19532
  34
  35 static const char* arg_url = NULL;
  36 static const char *arg_key = NULL;
  37 static const char *arg_cert = NULL;
  38 static const char *arg_trust = NULL;
  39 static const char *arg_directory = NULL;
  40 static char **arg_file = NULL;
  41 static const char *arg_cursor = NULL;
  42 static bool arg_after_cursor = false;
  43 static int arg_journal_type = 0;
  44 static const char *arg_machine = NULL;
  45 static bool arg_merge = false;
  46 static int arg_follow = -1;
  47 static const char *arg_save_state = NULL;
  48
  49 static void close_fd_input(Uploader *u);
  50
  51 #define SERVER_ANSWER_KEEP 2048
  52
  53 #define STATE_FILE "/var/lib/systemd/journal-upload/state"
  54
  55 #define easy_setopt(curl, opt, value, level, cmd)                       \
  56         do {                                                            \
  57                 code = curl_easy_setopt(curl, opt, value);              \
  58                 if (code) {                                             \
  59                         log_full(level,                                 \
  60                                  "curl_easy_setopt " #opt " failed: %s", \
  61                                   curl_easy_strerror(code));            \
  62                         cmd;                                            \
  63                 }                                                       \
  64         } while (0)
  65
  66 static size_t output_callback(char *buf,
  67                               size_t size,
  68                               size_t nmemb,
  69                               void *userp) {
  70         Uploader *u = userp;
  71
  72         assert(u);
  73
  74         log_debug("The server answers (%zu bytes): %.*s",
  75                   size*nmemb, (int)(size*nmemb), buf);
  76
  77         if (nmemb && !u->answer) {
  78                 u->answer = strndup(buf, size*nmemb);
  79                 if (!u->answer)
  80                         log_warning_errno(ENOMEM, "Failed to store server answer (%zu bytes): %m",
  81                                           size*nmemb);
  82         }
  83
  84         return size * nmemb;
  85 }
  86
  87 static int check_cursor_updating(Uploader *u) {
  88         _cleanup_free_ char *temp_path = NULL;
  89         _cleanup_fclose_ FILE *f = NULL;
  90         int r;
  91
  92         if (!u->state_file)
  93                 return 0;
  94
  95         r = mkdir_parents(u->state_file, 0755);
  96         if (r < 0)
  97                 return log_error_errno(r, "Cannot create parent directory of state file %s: %m",
  98                                        u->state_file);
  99
 100         r = fopen_temporary(u->state_file, &f, &temp_path);
 101         if (r < 0)
 102                 return log_error_errno(r, "Cannot save state to %s: %m",
 103                                        u->state_file);
 104         unlink(temp_path);
 105
 106         return 0;
 107 }
 108
 109 static int update_cursor_state(Uploader *u) {
 110         _cleanup_free_ char *temp_path = NULL;
 111         _cleanup_fclose_ FILE *f = NULL;
 112         int r;
 113
 114         if (!u->state_file || !u->last_cursor)
 115                 return 0;
 116
 117         r = fopen_temporary(u->state_file, &f, &temp_path);
 118         if (r < 0)
 119                 goto fail;
 120
 121         fprintf(f,
 122                 "# This is private data. Do not parse.\n"
 123                 "LAST_CURSOR=%s\n",
 124                 u->last_cursor);
 125
 126         r = fflush_and_check(f);
 127         if (r < 0)
 128                 goto fail;
 129
 130         if (rename(temp_path, u->state_file) < 0) {
 131                 r = -errno;
 132                 goto fail;
 133         }
 134
 135         return 0;
 136
 137 fail:
 138         if (temp_path)
 139                 (void) unlink(temp_path);
 140
 141         (void) unlink(u->state_file);
 142
 143         return log_error_errno(r, "Failed to save state %s: %m", u->state_file);
 144 }
 145
 146 static int load_cursor_state(Uploader *u) {
 147         int r;
 148
 149         if (!u->state_file)
 150                 return 0;
 151
 152         r = parse_env_file(NULL, u->state_file,
 153                            "LAST_CURSOR",  &u->last_cursor,
 154                            NULL);
 155
 156         if (r == -ENOENT)
 157                 log_debug("State file %s is not present.", u->state_file);
 158         else if (r < 0)
 159                 return log_error_errno(r, "Failed to read state file %s: %m",
 160                                        u->state_file);
 161         else
 162                 log_debug("Last cursor was %s", u->last_cursor);
 163
 164         return 0;
 165 }
 166
 167 int start_upload(Uploader *u,
 168                  size_t (*input_callback)(void *ptr,
 169                                           size_t size,
 170                                           size_t nmemb,
 171                                           void *userdata),
 172                  void *data) {
 173         CURLcode code;
 174
 175         assert(u);
 176         assert(input_callback);
 177
 178         if (!u->header) {
 179                 struct curl_slist *h;
 180
 181                 h = curl_slist_append(NULL, "Content-Type: application/vnd.fdo.journal");
 182                 if (!h)
 183                         return log_oom();
 184
 185                 h = curl_slist_append(h, "Transfer-Encoding: chunked");
 186                 if (!h) {
 187                         curl_slist_free_all(h);
 188                         return log_oom();
 189                 }
 190
 191                 h = curl_slist_append(h, "Accept: text/plain");
 192                 if (!h) {
 193                         curl_slist_free_all(h);
 194                         return log_oom();
 195                 }
 196
 197                 u->header = h;
 198         }
 199
 200         if (!u->easy) {
 201                 CURL *curl;
 202
 203                 curl = curl_easy_init();
 204                 if (!curl) {
 205                         log_error("Call to curl_easy_init failed.");
 206                         return -ENOSR;
 207                 }
 208
 209                 /* tell it to POST to the URL */
 210                 easy_setopt(curl, CURLOPT_POST, 1L,
 211                             LOG_ERR, return -EXFULL);
 212
 213                 easy_setopt(curl, CURLOPT_ERRORBUFFER, u->error,
 214                             LOG_ERR, return -EXFULL);
 215
 216                 /* set where to write to */
 217                 easy_setopt(curl, CURLOPT_WRITEFUNCTION, output_callback,
 218                             LOG_ERR, return -EXFULL);
 219
 220                 easy_setopt(curl, CURLOPT_WRITEDATA, data,
 221                             LOG_ERR, return -EXFULL);
 222
 223                 /* set where to read from */
 224                 easy_setopt(curl, CURLOPT_READFUNCTION, input_callback,
 225                             LOG_ERR, return -EXFULL);
 226
 227                 easy_setopt(curl, CURLOPT_READDATA, data,
 228                             LOG_ERR, return -EXFULL);
 229
 230                 /* use our special own mime type and chunked transfer */
 231                 easy_setopt(curl, CURLOPT_HTTPHEADER, u->header,
 232                             LOG_ERR, return -EXFULL);
 233
 234                 if (DEBUG_LOGGING)
 235                         /* enable verbose for easier tracing */
 236                         easy_setopt(curl, CURLOPT_VERBOSE, 1L, LOG_WARNING, );
 237
 238                 easy_setopt(curl, CURLOPT_USERAGENT,
 239                             "systemd-journal-upload " PACKAGE_STRING,
 240                             LOG_WARNING, );
 241
 242                 if (arg_key || startswith(u->url, "https://")) {
 243                         easy_setopt(curl, CURLOPT_SSLKEY, arg_key ?: PRIV_KEY_FILE,
 244                                     LOG_ERR, return -EXFULL);
 245                         easy_setopt(curl, CURLOPT_SSLCERT, arg_cert ?: CERT_FILE,
 246                                     LOG_ERR, return -EXFULL);
 247                 }
 248
 249                 if (streq_ptr(arg_trust, "all"))
 250                         easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0,
 251                                     LOG_ERR, return -EUCLEAN);
 252                 else if (arg_trust || startswith(u->url, "https://"))
 253                         easy_setopt(curl, CURLOPT_CAINFO, arg_trust ?: TRUST_FILE,
 254                                     LOG_ERR, return -EXFULL);
 255
 256                 if (arg_key || arg_trust)
 257                         easy_setopt(curl, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1,
 258                                     LOG_WARNING, );
 259
 260                 u->easy = curl;
 261         } else {
 262                 /* truncate the potential old error message */
 263                 u->error[0] = '\0';
 264
 265                 free(u->answer);
 266                 u->answer = 0;
 267         }
 268
 269         /* upload to this place */
 270         code = curl_easy_setopt(u->easy, CURLOPT_URL, u->url);
 271         if (code) {
 272                 log_error("curl_easy_setopt CURLOPT_URL failed: %s",
 273                           curl_easy_strerror(code));
 274                 return -EXFULL;
 275         }
 276
 277         u->uploading = true;
 278
 279         return 0;
 280 }
 281
 282 static size_t fd_input_callback(void *buf, size_t size, size_t nmemb, void *userp) {
 283         Uploader *u = userp;
 284         ssize_t n;
 285
 286         assert(u);
 287         assert(nmemb < SSIZE_MAX / size);
 288
 289         if (u->input < 0)
 290                 return 0;
 291
 292         assert(!size_multiply_overflow(size, nmemb));
 293
 294         n = read(u->input, buf, size * nmemb);
 295         log_debug("%s: allowed %zu, read %zd", __func__, size*nmemb, n);
 296         if (n > 0)
 297                 return n;
 298
 299         u->uploading = false;
 300         if (n < 0) {
 301                 log_error_errno(errno, "Aborting transfer after read error on input: %m.");
 302                 return CURL_READFUNC_ABORT;
 303         }
 304
 305         log_debug("Reached EOF");
 306         close_fd_input(u);
 307         return 0;
 308 }
 309
 310 static void close_fd_input(Uploader *u) {
 311         assert(u);
 312
 313         u->input = safe_close(u->input);
 314         u->timeout = 0;
 315 }
 316
 317 static int dispatch_fd_input(sd_event_source *event,
 318                              int fd,
 319                              uint32_t revents,
 320                              void *userp) {
 321         Uploader *u = userp;
 322
 323         assert(u);
 324         assert(fd >= 0);
 325
 326         if (revents & EPOLLHUP) {
 327                 log_debug("Received HUP");
 328                 close_fd_input(u);
 329                 return 0;
 330         }
 331
 332         if (!(revents & EPOLLIN)) {
 333                 log_warning("Unexpected poll event %"PRIu32".", revents);
 334                 return -EINVAL;
 335         }
 336
 337         if (u->uploading) {
 338                 log_warning("dispatch_fd_input called when uploading, ignoring.");
 339                 return 0;
 340         }
 341
 342         return start_upload(u, fd_input_callback, u);
 343 }
 344
 345 static int open_file_for_upload(Uploader *u, const char *filename) {
 346         int fd, r = 0;
 347
 348         if (streq(filename, "-"))
 349                 fd = STDIN_FILENO;
 350         else {
 351                 fd = open(filename, O_RDONLY|O_CLOEXEC|O_NOCTTY);
 352                 if (fd < 0)
 353                         return log_error_errno(errno, "Failed to open %s: %m", filename);
 354         }
 355
 356         u->input = fd;
 357
 358         if (arg_follow) {
 359                 r = sd_event_add_io(u->events, &u->input_event,
 360                                     fd, EPOLLIN, dispatch_fd_input, u);
 361                 if (r < 0) {
 362                         if (r != -EPERM || arg_follow > 0)
 363                                 return log_error_errno(r, "Failed to register input event: %m");
 364
 365                         /* Normal files should just be consumed without polling. */
 366                         r = start_upload(u, fd_input_callback, u);
 367                 }
 368         }
 369
 370         return r;
 371 }
 372
 373 static int dispatch_sigterm(sd_event_source *event,
 374                             const struct signalfd_siginfo *si,
 375                             void *userdata) {
 376         Uploader *u = userdata;
 377
 378         assert(u);
 379
 380         log_received_signal(LOG_INFO, si);
 381
 382         close_fd_input(u);
 383         close_journal_input(u);
 384
 385         sd_event_exit(u->events, 0);
 386         return 0;
 387 }
 388
 389 static int setup_signals(Uploader *u) {
 390         int r;
 391
 392         assert(u);
 393
 394         assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, -1) >= 0);
 395
 396         r = sd_event_add_signal(u->events, &u->sigterm_event, SIGTERM, dispatch_sigterm, u);
 397         if (r < 0)
 398                 return r;
 399
 400         r = sd_event_add_signal(u->events, &u->sigint_event, SIGINT, dispatch_sigterm, u);
 401         if (r < 0)
 402                 return r;
 403
 404         return 0;
 405 }
 406
 407 static int setup_uploader(Uploader *u, const char *url, const char *state_file) {
 408         int r;
 409         const char *host, *proto = "";
 410
 411         assert(u);
 412         assert(url);
 413
 414         memzero(u, sizeof(Uploader));
 415         u->input = -1;
 416
 417         if (!(host = startswith(url, "http://")) && !(host = startswith(url, "https://"))) {
 418                 host = url;
 419                 proto = "https://";
 420         }
 421
 422         if (strchr(host, ':'))
 423                 u->url = strjoin(proto, url, "/upload");
 424         else {
 425                 char *t;
 426                 size_t x;
 427
 428                 t = strdupa(url);
 429                 x = strlen(t);
 430                 while (x > 0 && t[x - 1] == '/')
 431                         t[x - 1] = '\0';
 432
 433                 u->url = strjoin(proto, t, ":" STRINGIFY(DEFAULT_PORT), "/upload");
 434         }
 435         if (!u->url)
 436                 return log_oom();
 437
 438         u->state_file = state_file;
 439
 440         r = sd_event_default(&u->events);
 441         if (r < 0)
 442                 return log_error_errno(r, "sd_event_default failed: %m");
 443
 444         r = setup_signals(u);
 445         if (r < 0)
 446                 return log_error_errno(r, "Failed to set up signals: %m");
 447
 448         (void) sd_watchdog_enabled(false, &u->watchdog_usec);
 449
 450         return load_cursor_state(u);
 451 }
 452
 453 static void destroy_uploader(Uploader *u) {
 454         assert(u);
 455
 456         curl_easy_cleanup(u->easy);
 457         curl_slist_free_all(u->header);
 458         free(u->answer);
 459
 460         free(u->last_cursor);
 461         free(u->current_cursor);
 462
 463         free(u->url);
 464
 465         u->input_event = sd_event_source_unref(u->input_event);
 466
 467         close_fd_input(u);
 468         close_journal_input(u);
 469
 470         sd_event_source_unref(u->sigterm_event);
 471         sd_event_source_unref(u->sigint_event);
 472         sd_event_unref(u->events);
 473 }
 474
 475 static int perform_upload(Uploader *u) {
 476         CURLcode code;
 477         long status;
 478
 479         assert(u);
 480
 481         u->watchdog_timestamp = now(CLOCK_MONOTONIC);
 482         code = curl_easy_perform(u->easy);
 483         if (code) {
 484                 if (u->error[0])
 485                         log_error("Upload to %s failed: %.*s",
 486                                   u->url, (int) sizeof(u->error), u->error);
 487                 else
 488                         log_error("Upload to %s failed: %s",
 489                                   u->url, curl_easy_strerror(code));
 490                 return -EIO;
 491         }
 492
 493         code = curl_easy_getinfo(u->easy, CURLINFO_RESPONSE_CODE, &status);
 494         if (code) {
 495                 log_error("Failed to retrieve response code: %s",
 496                           curl_easy_strerror(code));
 497                 return -EUCLEAN;
 498         }
 499
 500         if (status >= 300) {
 501                 log_error("Upload to %s failed with code %ld: %s",
 502                           u->url, status, strna(u->answer));
 503                 return -EIO;
 504         } else if (status < 200) {
 505                 log_error("Upload to %s finished with unexpected code %ld: %s",
 506                           u->url, status, strna(u->answer));
 507                 return -EIO;
 508         } else
 509                 log_debug("Upload finished successfully with code %ld: %s",
 510                           status, strna(u->answer));
 511
 512         free_and_replace(u->last_cursor, u->current_cursor);
 513
 514         return update_cursor_state(u);
 515 }
 516
 517 static int parse_config(void) {
 518         const ConfigTableItem items[] = {
 519                 { "Upload",  "URL",                    config_parse_string, 0, &arg_url    },
 520                 { "Upload",  "ServerKeyFile",          config_parse_path,   0, &arg_key    },
 521                 { "Upload",  "ServerCertificateFile",  config_parse_path,   0, &arg_cert   },
 522                 { "Upload",  "TrustedCertificateFile", config_parse_path,   0, &arg_trust  },
 523                 {}};
 524
 525         return config_parse_many_nulstr(PKGSYSCONFDIR "/journal-upload.conf",
 526                                         CONF_PATHS_NULSTR("systemd/journal-upload.conf.d"),
 527                                         "Upload\0", config_item_table_lookup, items,
 528                                         CONFIG_PARSE_WARN, NULL);
 529 }
 530
 531 static int help(void) {
 532         _cleanup_free_ char *link = NULL;
 533         int r;
 534
 535         r = terminal_urlify_man("systemd-journal-upload.service", "8", &link);
 536         if (r < 0)
 537                 return log_oom();
 538
 539         printf("%s -u URL {FILE|-}...\n\n"
 540                "Upload journal events to a remote server.\n\n"
 541                "  -h --help                 Show this help\n"
 542                "     --version              Show package version\n"
 543                "  -u --url=URL              Upload to this address (default port "
 544                                             STRINGIFY(DEFAULT_PORT) ")\n"
 545                "     --key=FILENAME         Specify key in PEM format (default:\n"
 546                "                            \"" PRIV_KEY_FILE "\")\n"
 547                "     --cert=FILENAME        Specify certificate in PEM format (default:\n"
 548                "                            \"" CERT_FILE "\")\n"
 549                "     --trust=FILENAME|all   Specify CA certificate or disable checking (default:\n"
 550                "                            \"" TRUST_FILE "\")\n"
 551                "     --system               Use the system journal\n"
 552                "     --user                 Use the user journal for the current user\n"
 553                "  -m --merge                Use  all available journals\n"
 554                "  -M --machine=CONTAINER    Operate on local container\n"
 555                "  -D --directory=PATH       Use journal files from directory\n"
 556                "     --file=PATH            Use this journal file\n"
 557                "     --cursor=CURSOR        Start at the specified cursor\n"
 558                "     --after-cursor=CURSOR  Start after the specified cursor\n"
 559                "     --follow[=BOOL]        Do [not] wait for input\n"
 560                "     --save-state[=FILE]    Save uploaded cursors (default \n"
 561                "                            " STATE_FILE ")\n"
 562                "\nSee the %s for details.\n"
 563                , program_invocation_short_name
 564                , link
 565         );
 566
 567         return 0;
 568 }
 569
 570 static int parse_argv(int argc, char *argv[]) {
 571         enum {
 572                 ARG_VERSION = 0x100,
 573                 ARG_KEY,
 574                 ARG_CERT,
 575                 ARG_TRUST,
 576                 ARG_USER,
 577                 ARG_SYSTEM,
 578                 ARG_FILE,
 579                 ARG_CURSOR,
 580                 ARG_AFTER_CURSOR,
 581                 ARG_FOLLOW,
 582                 ARG_SAVE_STATE,
 583         };
 584
 585         static const struct option options[] = {
 586                 { "help",         no_argument,       NULL, 'h'                },
 587                 { "version",      no_argument,       NULL, ARG_VERSION        },
 588                 { "url",          required_argument, NULL, 'u'                },
 589                 { "key",          required_argument, NULL, ARG_KEY            },
 590                 { "cert",         required_argument, NULL, ARG_CERT           },
 591                 { "trust",        required_argument, NULL, ARG_TRUST          },
 592                 { "system",       no_argument,       NULL, ARG_SYSTEM         },
 593                 { "user",         no_argument,       NULL, ARG_USER           },
 594                 { "merge",        no_argument,       NULL, 'm'                },
 595                 { "machine",      required_argument, NULL, 'M'                },
 596                 { "directory",    required_argument, NULL, 'D'                },
 597                 { "file",         required_argument, NULL, ARG_FILE           },
 598                 { "cursor",       required_argument, NULL, ARG_CURSOR         },
 599                 { "after-cursor", required_argument, NULL, ARG_AFTER_CURSOR   },
 600                 { "follow",       optional_argument, NULL, ARG_FOLLOW         },
 601                 { "save-state",   optional_argument, NULL, ARG_SAVE_STATE     },
 602                 {}
 603         };
 604
 605         int c, r;
 606
 607         assert(argc >= 0);
 608         assert(argv);
 609
 610         opterr = 0;
 611
 612         while ((c = getopt_long(argc, argv, "hu:mM:D:", options, NULL)) >= 0)
 613                 switch(c) {
 614                 case 'h':
 615                         return help();
 616
 617                 case ARG_VERSION:
 618                         return version();
 619
 620                 case 'u':
 621                         if (arg_url) {
 622                                 log_error("cannot use more than one --url");
 623                                 return -EINVAL;
 624                         }
 625
 626                         arg_url = optarg;
 627                         break;
 628
 629                 case ARG_KEY:
 630                         if (arg_key) {
 631                                 log_error("cannot use more than one --key");
 632                                 return -EINVAL;
 633                         }
 634
 635                         arg_key = optarg;
 636                         break;
 637
 638                 case ARG_CERT:
 639                         if (arg_cert) {
 640                                 log_error("cannot use more than one --cert");
 641                                 return -EINVAL;
 642                         }
 643
 644                         arg_cert = optarg;
 645                         break;
 646
 647                 case ARG_TRUST:
 648                         if (arg_trust) {
 649                                 log_error("cannot use more than one --trust");
 650                                 return -EINVAL;
 651                         }
 652
 653                         arg_trust = optarg;
 654                         break;
 655
 656                 case ARG_SYSTEM:
 657                         arg_journal_type |= SD_JOURNAL_SYSTEM;
 658                         break;
 659
 660                 case ARG_USER:
 661                         arg_journal_type |= SD_JOURNAL_CURRENT_USER;
 662                         break;
 663
 664                 case 'm':
 665                         arg_merge = true;
 666                         break;
 667
 668                 case 'M':
 669                         if (arg_machine) {
 670                                 log_error("cannot use more than one --machine/-M");
 671                                 return -EINVAL;
 672                         }
 673
 674                         arg_machine = optarg;
 675                         break;
 676
 677                 case 'D':
 678                         if (arg_directory) {
 679                                 log_error("cannot use more than one --directory/-D");
 680                                 return -EINVAL;
 681                         }
 682
 683                         arg_directory = optarg;
 684                         break;
 685
 686                 case ARG_FILE:
 687                         r = glob_extend(&arg_file, optarg);
 688                         if (r < 0)
 689                                 return log_error_errno(r, "Failed to add paths: %m");
 690                         break;
 691
 692                 case ARG_CURSOR:
 693                         if (arg_cursor) {
 694                                 log_error("cannot use more than one --cursor/--after-cursor");
 695                                 return -EINVAL;
 696                         }
 697
 698                         arg_cursor = optarg;
 699                         break;
 700
 701                 case ARG_AFTER_CURSOR:
 702                         if (arg_cursor) {
 703                                 log_error("cannot use more than one --cursor/--after-cursor");
 704                                 return -EINVAL;
 705                         }
 706
 707                         arg_cursor = optarg;
 708                         arg_after_cursor = true;
 709                         break;
 710
 711                 case ARG_FOLLOW:
 712                         if (optarg) {
 713                                 r = parse_boolean(optarg);
 714                                 if (r < 0) {
 715                                         log_error("Failed to parse --follow= parameter.");
 716                                         return -EINVAL;
 717                                 }
 718
 719                                 arg_follow = !!r;
 720                         } else
 721                                 arg_follow = true;
 722
 723                         break;
 724
 725                 case ARG_SAVE_STATE:
 726                         arg_save_state = optarg ?: STATE_FILE;
 727                         break;
 728
 729                 case '?':
 730                         log_error("Unknown option %s.", argv[optind-1]);
 731                         return -EINVAL;
 732
 733                 case ':':
 734                         log_error("Missing argument to %s.", argv[optind-1]);
 735                         return -EINVAL;
 736
 737                 default:
 738                         assert_not_reached("Unhandled option code.");
 739                 }
 740
 741         if (!arg_url) {
 742                 log_error("Required --url/-u option missing.");
 743                 return -EINVAL;
 744         }
 745
 746         if (!!arg_key != !!arg_cert) {
 747                 log_error("Options --key and --cert must be used together.");
 748                 return -EINVAL;
 749         }
 750
 751         if (optind < argc && (arg_directory || arg_file || arg_machine || arg_journal_type)) {
 752                 log_error("Input arguments make no sense with journal input.");
 753                 return -EINVAL;
 754         }
 755
 756         return 1;
 757 }
 758
 759 static int open_journal(sd_journal **j) {
 760         int r;
 761
 762         if (arg_directory)
 763                 r = sd_journal_open_directory(j, arg_directory, arg_journal_type);
 764         else if (arg_file)
 765                 r = sd_journal_open_files(j, (const char**) arg_file, 0);
 766         else if (arg_machine)
 767                 r = sd_journal_open_container(j, arg_machine, 0);
 768         else
 769                 r = sd_journal_open(j, !arg_merge*SD_JOURNAL_LOCAL_ONLY + arg_journal_type);
 770         if (r < 0)
 771                 log_error_errno(r, "Failed to open %s: %m",
 772                                 arg_directory ? arg_directory : arg_file ? "files" : "journal");
 773         return r;
 774 }
 775
 776 int main(int argc, char **argv) {
 777         Uploader u;
 778         int r;
 779         bool use_journal;
 780
 781         log_show_color(true);
 782         log_parse_environment();
 783
 784         /* The journal merging logic potentially needs a lot of fds. */
 785         (void) rlimit_nofile_bump(HIGH_RLIMIT_NOFILE);
 786
 787         r = parse_config();
 788         if (r < 0)
 789                 goto finish;
 790
 791         r = parse_argv(argc, argv);
 792         if (r <= 0)
 793                 goto finish;
 794
 795         sigbus_install();
 796
 797         r = setup_uploader(&u, arg_url, arg_save_state);
 798         if (r < 0)
 799                 goto cleanup;
 800
 801         sd_event_set_watchdog(u.events, true);
 802
 803         r = check_cursor_updating(&u);
 804         if (r < 0)
 805                 goto cleanup;
 806
 807         log_debug("%s running as pid "PID_FMT,
 808                   program_invocation_short_name, getpid_cached());
 809
 810         use_journal = optind >= argc;
 811         if (use_journal) {
 812                 sd_journal *j;
 813                 r = open_journal(&j);
 814                 if (r < 0)
 815                         goto finish;
 816                 r = open_journal_for_upload(&u, j,
 817                                             arg_cursor ?: u.last_cursor,
 818                                             arg_cursor ? arg_after_cursor : true,
 819                                             !!arg_follow);
 820                 if (r < 0)
 821                         goto finish;
 822         }
 823
 824         sd_notify(false,
 825                   "READY=1\n"
 826                   "STATUS=Processing input...");
 827
 828         for (;;) {
 829                 r = sd_event_get_state(u.events);
 830                 if (r < 0)
 831                         break;
 832                 if (r == SD_EVENT_FINISHED)
 833                         break;
 834
 835                 if (use_journal) {
 836                         if (!u.journal)
 837                                 break;
 838
 839                         r = check_journal_input(&u);
 840                 } else if (u.input < 0 && !use_journal) {
 841                         if (optind >= argc)
 842                                 break;
 843
 844                         log_debug("Using %s as input.", argv[optind]);
 845                         r = open_file_for_upload(&u, argv[optind++]);
 846                 }
 847                 if (r < 0)
 848                         goto cleanup;
 849
 850                 if (u.uploading) {
 851                         r = perform_upload(&u);
 852                         if (r < 0)
 853                                 break;
 854                 }
 855
 856                 r = sd_event_run(u.events, u.timeout);
 857                 if (r < 0) {
 858                         log_error_errno(r, "Failed to run event loop: %m");
 859                         break;
 860                 }
 861         }
 862
 863 cleanup:
 864         sd_notify(false,
 865                   "STOPPING=1\n"
 866                   "STATUS=Shutting down...");
 867
 868         destroy_uploader(&u);
 869
 870 finish:
 871         return r >= 0 ? EXIT_SUCCESS : EXIT_FAILURE;
 872 }