+static OutputMode arg_output = OUTPUT_SHORT;
+static bool arg_follow = false;
+static bool arg_show_all = false;
+static bool arg_no_pager = false;
+static int arg_lines = -1;
+static bool arg_no_tail = false;
+static bool arg_quiet = false;
+static bool arg_local = false;
+static bool arg_this_boot = false;
+static const char *arg_directory = NULL;
+static int arg_priorities = 0xFF;
+static const char *arg_verify_key = NULL;
+#ifdef HAVE_GCRYPT
+static usec_t arg_interval = DEFAULT_FSS_INTERVAL_USEC;
+#endif
+
+static enum {
+ ACTION_SHOW,
+ ACTION_NEW_ID128,
+ ACTION_PRINT_HEADER,
+ ACTION_SETUP_KEYS,
+ ACTION_VERIFY
+} arg_action = ACTION_SHOW;
+
+static int help(void) {
+
+ printf("%s [OPTIONS...] [MATCH]\n\n"
+ "Send control commands to or query the journal.\n\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ " --no-pager Do not pipe output into a pager\n"
+ " -a --all Show all fields, including long and unprintable\n"
+ " -f --follow Follow journal\n"
+ " -n --lines=INTEGER Journal entries to show\n"
+ " --no-tail Show all lines, even in follow mode\n"
+ " -o --output=STRING Change journal output mode (short, short-monotonic,\n"
+ " verbose, export, json, cat)\n"
+ " -q --quiet Don't show privilege warning\n"
+ " -l --local Only local entries\n"
+ " -b --this-boot Show data only from current boot\n"
+ " -D --directory=PATH Show journal files from directory\n"
+ " -p --priority=RANGE Show only messages within the specified priority range\n\n"
+ "Commands:\n"
+ " --new-id128 Generate a new 128 Bit ID\n"
+ " --header Show journal header information\n"
+#ifdef HAVE_GCRYPT
+ " --setup-keys Generate new FSS key pair\n"
+ " --interval=TIME Time interval for changing the FSS sealing key\n"
+ " --verify Verify journal file consistency\n"
+ " --verify-key=KEY Specify FSS verification key\n"
+#endif
+ , program_invocation_short_name);
+
+ return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_VERSION = 0x100,
+ ARG_NO_PAGER,
+ ARG_NO_TAIL,
+ ARG_NEW_ID128,
+ ARG_HEADER,
+ ARG_SETUP_KEYS,
+ ARG_INTERVAL,
+ ARG_VERIFY,
+ ARG_VERIFY_KEY
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version" , no_argument, NULL, ARG_VERSION },
+ { "no-pager", no_argument, NULL, ARG_NO_PAGER },
+ { "follow", no_argument, NULL, 'f' },
+ { "output", required_argument, NULL, 'o' },
+ { "all", no_argument, NULL, 'a' },
+ { "lines", required_argument, NULL, 'n' },
+ { "no-tail", no_argument, NULL, ARG_NO_TAIL },
+ { "new-id128", no_argument, NULL, ARG_NEW_ID128 },
+ { "quiet", no_argument, NULL, 'q' },
+ { "local", no_argument, NULL, 'l' },
+ { "this-boot", no_argument, NULL, 'b' },
+ { "directory", required_argument, NULL, 'D' },
+ { "header", no_argument, NULL, ARG_HEADER },
+ { "priority", no_argument, NULL, 'p' },
+ { "setup-keys", no_argument, NULL, ARG_SETUP_KEYS },
+ { "interval", required_argument, NULL, ARG_INTERVAL },
+ { "verify", no_argument, NULL, ARG_VERIFY },
+ { "verify-key", required_argument, NULL, ARG_VERIFY_KEY },
+ { NULL, 0, NULL, 0 }
+ };
+
+ int c, r;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "hfo:an:qlbD:p:", options, NULL)) >= 0) {
+
+ switch (c) {
+
+ case 'h':
+ help();
+ return 0;
+
+ case ARG_VERSION:
+ puts(PACKAGE_STRING);
+ puts(DISTRIBUTION);
+ puts(SYSTEMD_FEATURES);
+ return 0;
+
+ case ARG_NO_PAGER:
+ arg_no_pager = true;
+ break;
+
+ case 'f':
+ arg_follow = true;
+ break;
+
+ case 'o':
+ arg_output = output_mode_from_string(optarg);
+ if (arg_output < 0) {
+ log_error("Unknown output '%s'.", optarg);
+ return -EINVAL;
+ }
+
+ break;
+
+ case 'a':
+ arg_show_all = true;
+ break;
+
+ case 'n':
+ r = safe_atoi(optarg, &arg_lines);
+ if (r < 0 || arg_lines < 0) {
+ log_error("Failed to parse lines '%s'", optarg);
+ return -EINVAL;
+ }
+ break;
+
+ case ARG_NO_TAIL:
+ arg_no_tail = true;
+ break;
+
+ case ARG_NEW_ID128:
+ arg_action = ACTION_NEW_ID128;
+ break;
+
+ case 'q':
+ arg_quiet = true;
+ break;
+
+ case 'l':
+ arg_local = true;
+ break;
+
+ case 'b':
+ arg_this_boot = true;
+ break;
+
+ case 'D':
+ arg_directory = optarg;
+ break;
+
+ case ARG_HEADER:
+ arg_action = ACTION_PRINT_HEADER;
+ break;
+
+ case ARG_VERIFY:
+ arg_action = ACTION_VERIFY;
+ break;
+
+#ifdef HAVE_GCRYPT
+ case ARG_SETUP_KEYS:
+ arg_action = ACTION_SETUP_KEYS;
+ break;
+
+
+ case ARG_VERIFY_KEY:
+ arg_action = ACTION_VERIFY;
+ arg_verify_key = optarg;
+ break;
+
+ case ARG_INTERVAL:
+ r = parse_usec(optarg, &arg_interval);
+ if (r < 0 || arg_interval <= 0) {
+ log_error("Failed to parse sealing key change interval: %s", optarg);
+ return -EINVAL;
+ }
+ break;
+#else
+ case ARG_SETUP_KEYS:
+ case ARG_VERIFY_KEY:
+ case ARG_INTERVAL:
+ log_error("Forward-secure sealing not available.");
+ return -ENOTSUP;
+#endif
+
+ case 'p': {
+ const char *dots;
+
+ dots = strstr(optarg, "..");
+ if (dots) {
+ char *a;
+ int from, to, i;
+
+ /* a range */
+ a = strndup(optarg, dots - optarg);
+ if (!a)
+ return log_oom();
+
+ from = log_level_from_string(a);
+ to = log_level_from_string(dots + 2);
+ free(a);
+
+ if (from < 0 || to < 0) {
+ log_error("Failed to parse log level range %s", optarg);
+ return -EINVAL;
+ }
+
+ arg_priorities = 0;
+
+ if (from < to) {
+ for (i = from; i <= to; i++)
+ arg_priorities |= 1 << i;
+ } else {
+ for (i = to; i <= from; i++)
+ arg_priorities |= 1 << i;
+ }
+
+ } else {
+ int p, i;
+
+ p = log_level_from_string(optarg);
+ if (p < 0) {
+ log_error("Unknown log level %s", optarg);
+ return -EINVAL;
+ }
+
+ arg_priorities = 0;
+
+ for (i = 0; i <= p; i++)
+ arg_priorities |= 1 << i;
+ }
+
+ break;
+ }
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ log_error("Unknown option code %c", c);
+ return -EINVAL;
+ }
+ }
+
+ if (arg_follow && !arg_no_tail && arg_lines < 0)
+ arg_lines = 10;
+
+ return 1;
+}
+
+static bool on_tty(void) {
+ static int t = -1;
+
+ /* Note that this is invoked relatively early, before we start
+ * the pager. That means the value we return reflects whether
+ * we originally were started on a tty, not if we currently
+ * are. But this is intended, since we want colour and so on
+ * when run in our own pager. */
+
+ if (_unlikely_(t < 0))
+ t = isatty(STDOUT_FILENO) > 0;
+
+ return t;
+}
+
+static int generate_new_id128(void) {
+ sd_id128_t id;
+ int r;
+ unsigned i;
+
+ r = sd_id128_randomize(&id);
+ if (r < 0) {
+ log_error("Failed to generate ID: %s", strerror(-r));