Fork of Original Code Base: anongit.freedesktop.org/systemd

This is the initial fork of the code base from freedsktop.org.
The code is provided here as a reference of the initial starting
point and for possible future checkouts after a large portion
of this code is removed.

Merge git://anongit.freedesktop.org/systemd/systemd

1 files changed, 1060 insertions, 0 deletions

diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c
new file mode 100644
index 0000000000..cccd8a7692
--- /dev/null
+++ b/src/journal/journalctl.c
@@ -0,0 +1,1060 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2011 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <locale.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stddef.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/poll.h>
+#include <time.h>
+#include <getopt.h>
+#include <signal.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <linux/fs.h>
+
+#include <systemd/sd-journal.h>
+
+#include "log.h"
+#include "util.h"
+#include "path-util.h"
+#include "build.h"
+#include "pager.h"
+#include "logs-show.h"
+#include "strv.h"
+#include "journal-internal.h"
+#include "journal-def.h"
+#include "journal-verify.h"
+#include "journal-authenticate.h"
+#include "journal-qrcode.h"
+#include "fsprg.h"
+#include "unit-name.h"
+
+#define DEFAULT_FSS_INTERVAL_USEC (15*USEC_PER_MINUTE)
+
+static OutputMode arg_output = OUTPUT_SHORT;
+static bool arg_follow = false;
+static bool arg_all = false;
+static bool arg_no_pager = false;
+static unsigned arg_lines = 0;
+static bool arg_no_tail = false;
+static bool arg_quiet = false;
+static bool arg_merge = false;
+static bool arg_this_boot = false;
+static const char *arg_cursor = NULL;
+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 usec_t arg_since, arg_until;
+static bool arg_since_set = false, arg_until_set = false;
+static const char *arg_unit = NULL;
+static const char *arg_field = NULL;
+
+static enum {
+        ACTION_SHOW,
+        ACTION_NEW_ID128,
+        ACTION_PRINT_HEADER,
+        ACTION_SETUP_KEYS,
+        ACTION_VERIFY,
+        ACTION_DISK_USAGE,
+} arg_action = ACTION_SHOW;
+
+static int help(void) {
+
+        printf("%s [OPTIONS...] [MATCHES...]\n\n"
+               "Query the journal.\n\n"
+               "Flags:\n"
+               "     --since=DATE        Start showing entries newer or of the specified date\n"
+               "     --until=DATE        Stop showing entries older or of the specified date\n"
+               "  -c --cursor=CURSOR     Start showing entries from specified cursor\n"
+               "  -b --this-boot         Show data only from current boot\n"
+               "  -u --unit=UNIT         Show data only from the specified unit\n"
+               "  -p --priority=RANGE    Show only messages within the specified priority range\n"
+               "  -f --follow            Follow journal\n"
+               "  -n --lines[=INTEGER]   Number of 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, json-pretty, json-sse, cat)\n"
+               "  -a --all               Show all fields, including long and unprintable\n"
+               "  -q --quiet             Don't show privilege warning\n"
+               "     --no-pager          Do not pipe output into a pager\n"
+               "  -m --merge             Show entries from all available journals\n"
+               "  -D --directory=PATH    Show journal files from directory\n"
+#ifdef HAVE_GCRYPT
+               "     --interval=TIME     Time interval for changing the FSS sealing key\n"
+               "     --verify-key=KEY    Specify FSS verification key\n"
+#endif
+               "\nCommands:\n"
+               "  -h --help              Show this help\n"
+               "     --version           Show package version\n"
+               "     --new-id128         Generate a new 128 Bit ID\n"
+               "     --header            Show journal header information\n"
+               "     --disk-usage        Show total disk usage\n"
+               "  -F --field=FIELD       List all values a certain field takes\n"
+#ifdef HAVE_GCRYPT
+               "     --setup-keys        Generate new FSS key pair\n"
+               "     --verify            Verify journal file consistency\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,
+                ARG_DISK_USAGE,
+                ARG_SINCE,
+                ARG_UNTIL
+        };
+
+        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",        optional_argument, NULL, 'n'              },
+                { "no-tail",      no_argument,       NULL, ARG_NO_TAIL      },
+                { "new-id128",    no_argument,       NULL, ARG_NEW_ID128    },
+                { "quiet",        no_argument,       NULL, 'q'              },
+                { "merge",        no_argument,       NULL, 'm'              },
+                { "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   },
+                { "disk-usage",   no_argument,       NULL, ARG_DISK_USAGE   },
+                { "cursor",       required_argument, NULL, 'c'              },
+                { "since",        required_argument, NULL, ARG_SINCE        },
+                { "until",        required_argument, NULL, ARG_UNTIL        },
+                { "unit",         required_argument, NULL, 'u'              },
+                { "field",        required_argument, NULL, 'F'              },
+                { NULL,           0,                 NULL, 0                }
+        };
+
+        int c, r;
+
+        assert(argc >= 0);
+        assert(argv);
+
+        while ((c = getopt_long(argc, argv, "hfo:an::qmbD:p:c:u:F:", 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 format '%s'.", optarg);
+                                return -EINVAL;
+                        }
+
+                        if (arg_output == OUTPUT_EXPORT ||
+                            arg_output == OUTPUT_JSON ||
+                            arg_output == OUTPUT_JSON_PRETTY ||
+                            arg_output == OUTPUT_JSON_SSE ||
+                            arg_output == OUTPUT_CAT)
+                                arg_quiet = true;
+
+                        break;
+
+                case 'a':
+                        arg_all = true;
+                        break;
+
+                case 'n':
+                        if (optarg) {
+                                r = safe_atou(optarg, &arg_lines);
+                                if (r < 0 || arg_lines <= 0) {
+                                        log_error("Failed to parse lines '%s'", optarg);
+                                        return -EINVAL;
+                                }
+                        } else
+                                arg_lines = 10;
+
+                        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 'm':
+                        arg_merge = true;
+                        break;
+
+                case 'b':
+                        arg_this_boot = true;
+                        break;
+
+                case 'D':
+                        arg_directory = optarg;
+                        break;
+
+                case 'c':
+                        arg_cursor = optarg;
+                        break;
+
+                case ARG_HEADER:
+                        arg_action = ACTION_PRINT_HEADER;
+                        break;
+
+                case ARG_VERIFY:
+                        arg_action = ACTION_VERIFY;
+                        break;
+
+                case ARG_DISK_USAGE:
+                        arg_action = ACTION_DISK_USAGE;
+                        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;
+                        arg_merge = false;
+                        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 ARG_SINCE:
+                        r = parse_timestamp(optarg, &arg_since);
+                        if (r < 0) {
+                                log_error("Failed to parse timestamp: %s", optarg);
+                                return -EINVAL;
+                        }
+                        arg_since_set = true;
+                        break;
+
+                case ARG_UNTIL:
+                        r = parse_timestamp(optarg, &arg_until);
+                        if (r < 0) {
+                                log_error("Failed to parse timestamp: %s", optarg);
+                                return -EINVAL;
+                        }
+                        arg_until_set = true;
+                        break;
+
+                case 'u':
+                        arg_unit = optarg;
+                        break;
+
+                case '?':
+                        return -EINVAL;
+
+                case 'F':
+                        arg_field = optarg;
+                        break;
+
+                default:
+                        log_error("Unknown option code %c", c);
+                        return -EINVAL;
+                }
+        }
+
+        if (arg_follow && !arg_no_tail && arg_lines <= 0)
+                arg_lines = 10;
+
+        if (arg_since_set && arg_until_set && arg_since_set > arg_until_set) {
+                log_error("--since= must be before --until=.");
+                return -EINVAL;
+        }
+
+        if (arg_cursor && arg_since_set) {
+                log_error("Please specify either --since= or --cursor=, not both.");
+                return -EINVAL;
+        }
+
+        return 1;
+}
+
+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));
+                return r;
+        }
+
+        printf("As string:\n"
+               SD_ID128_FORMAT_STR "\n\n"
+               "As UUID:\n"
+               "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n\n"
+               "As macro:\n"
+              "#define MESSAGE_XYZ SD_ID128_MAKE(",
+               SD_ID128_FORMAT_VAL(id),
+               SD_ID128_FORMAT_VAL(id));
+
+        for (i = 0; i < 16; i++)
+                printf("%02x%s", id.bytes[i], i != 15 ? "," : "");
+
+        fputs(")\n", stdout);
+
+        return 0;
+}
+
+static int add_matches(sd_journal *j, char **args) {
+        char **i;
+        int r;
+
+        assert(j);
+
+        STRV_FOREACH(i, args) {
+
+                if (streq(*i, "+"))
+                        r = sd_journal_add_disjunction(j);
+                else if (path_is_absolute(*i)) {
+                        char *p, *t = NULL;
+                        const char *path;
+                        struct stat st;
+
+                        p = canonicalize_file_name(*i);
+                        path = p ? p : *i;
+
+                        if (stat(path, &st) < 0)  {
+                                free(p);
+                                log_error("Couldn't stat file: %m");
+                                return -errno;
+                        }
+
+                        if (S_ISREG(st.st_mode) && (0111 & st.st_mode))
+                                t = strappend("_EXE=", path);
+                        else if (S_ISCHR(st.st_mode))
+                                asprintf(&t, "_KERNEL_DEVICE=c%u:%u", major(st.st_rdev), minor(st.st_rdev));
+                        else if (S_ISBLK(st.st_mode))
+                                asprintf(&t, "_KERNEL_DEVICE=b%u:%u", major(st.st_rdev), minor(st.st_rdev));
+                        else {
+                                free(p);
+                                log_error("File is not a device node, regular file or is not executable: %s", *i);
+                                return -EINVAL;
+                        }
+
+                        free(p);
+
+                        if (!t)
+                                return log_oom();
+
+                        r = sd_journal_add_match(j, t, 0);
+                        free(t);
+                } else
+                        r = sd_journal_add_match(j, *i, 0);
+
+                if (r < 0) {
+                        log_error("Failed to add match '%s': %s", *i, strerror(-r));
+                        return r;
+                }
+        }
+
+        return 0;
+}
+
+static int add_this_boot(sd_journal *j) {
+        char match[9+32+1] = "_BOOT_ID=";
+        sd_id128_t boot_id;
+        int r;
+
+        assert(j);
+
+        if (!arg_this_boot)
+                return 0;
+
+        r = sd_id128_get_boot(&boot_id);
+        if (r < 0) {
+                log_error("Failed to get boot id: %s", strerror(-r));
+                return r;
+        }
+
+        sd_id128_to_string(boot_id, match + 9);
+        r = sd_journal_add_match(j, match, strlen(match));
+        if (r < 0) {
+                log_error("Failed to add match: %s", strerror(-r));
+                return r;
+        }
+
+        return 0;
+}
+
+static int add_unit(sd_journal *j) {
+        _cleanup_free_ char *m = NULL, *u = NULL;
+        int r;
+
+        assert(j);
+
+        if (isempty(arg_unit))
+                return 0;
+
+        u = unit_name_mangle(arg_unit);
+        if (!u)
+                return log_oom();
+
+        m = strappend("_SYSTEMD_UNIT=", u);
+        if (!m)
+                return log_oom();
+
+        r = sd_journal_add_match(j, m, strlen(m));
+        if (r < 0) {
+                log_error("Failed to add match: %s", strerror(-r));
+                return r;
+        }
+
+        return 0;
+}
+
+static int add_priorities(sd_journal *j) {
+        char match[] = "PRIORITY=0";
+        int i, r;
+
+        assert(j);
+
+        if (arg_priorities == 0xFF)
+                return 0;
+
+        for (i = LOG_EMERG; i <= LOG_DEBUG; i++)
+                if (arg_priorities & (1 << i)) {
+                        match[sizeof(match)-2] = '0' + i;
+
+                        r = sd_journal_add_match(j, match, strlen(match));
+                        if (r < 0) {
+                                log_error("Failed to add match: %s", strerror(-r));
+                                return r;
+                        }
+                }
+
+        return 0;
+}
+
+static int setup_keys(void) {
+#ifdef HAVE_GCRYPT
+        size_t mpk_size, seed_size, state_size, i;
+        uint8_t *mpk, *seed, *state;
+        ssize_t l;
+        int fd = -1, r, attr = 0;
+        sd_id128_t machine, boot;
+        char *p = NULL, *k = NULL;
+        struct FSSHeader h;
+        uint64_t n;
+
+        r = sd_id128_get_machine(&machine);
+        if (r < 0) {
+                log_error("Failed to get machine ID: %s", strerror(-r));
+                return r;
+        }
+
+        r = sd_id128_get_boot(&boot);
+        if (r < 0) {
+                log_error("Failed to get boot ID: %s", strerror(-r));
+                return r;
+        }
+
+        if (asprintf(&p, "/var/log/journal/" SD_ID128_FORMAT_STR "/fss",
+                     SD_ID128_FORMAT_VAL(machine)) < 0)
+                return log_oom();
+
+        if (access(p, F_OK) >= 0) {
+                log_error("Sealing key file %s exists already.", p);
+                r = -EEXIST;
+                goto finish;
+        }
+
+        if (asprintf(&k, "/var/log/journal/" SD_ID128_FORMAT_STR "/fss.tmp.XXXXXX",
+                     SD_ID128_FORMAT_VAL(machine)) < 0) {
+                r = log_oom();
+                goto finish;
+        }
+
+        mpk_size = FSPRG_mskinbytes(FSPRG_RECOMMENDED_SECPAR);
+        mpk = alloca(mpk_size);
+
+        seed_size = FSPRG_RECOMMENDED_SEEDLEN;
+        seed = alloca(seed_size);
+
+        state_size = FSPRG_stateinbytes(FSPRG_RECOMMENDED_SECPAR);
+        state = alloca(state_size);
+
+        fd = open("/dev/random", O_RDONLY|O_CLOEXEC|O_NOCTTY);
+        if (fd < 0) {
+                log_error("Failed to open /dev/random: %m");
+                r = -errno;
+                goto finish;
+        }
+
+        log_info("Generating seed...");
+        l = loop_read(fd, seed, seed_size, true);
+        if (l < 0 || (size_t) l != seed_size) {
+                log_error("Failed to read random seed: %s", strerror(EIO));
+                r = -EIO;
+                goto finish;
+        }
+
+        log_info("Generating key pair...");
+        FSPRG_GenMK(NULL, mpk, seed, seed_size, FSPRG_RECOMMENDED_SECPAR);
+
+        log_info("Generating sealing key...");
+        FSPRG_GenState0(state, mpk, seed, seed_size);
+
+        assert(arg_interval > 0);
+
+        n = now(CLOCK_REALTIME);
+        n /= arg_interval;
+
+        close_nointr_nofail(fd);
+        fd = mkostemp(k, O_WRONLY|O_CLOEXEC|O_NOCTTY);
+        if (fd < 0) {
+                log_error("Failed to open %s: %m", k);
+                r = -errno;
+                goto finish;
+        }
+
+        /* Enable secure remove, exclusion from dump, synchronous
+         * writing and in-place updating */
+        if (ioctl(fd, FS_IOC_GETFLAGS, &attr) < 0)
+                log_warning("FS_IOC_GETFLAGS failed: %m");
+
+        attr |= FS_SECRM_FL|FS_NODUMP_FL|FS_SYNC_FL|FS_NOCOW_FL;
+
+        if (ioctl(fd, FS_IOC_SETFLAGS, &attr) < 0)
+                log_warning("FS_IOC_SETFLAGS failed: %m");
+
+        zero(h);
+        memcpy(h.signature, "KSHHRHLP", 8);
+        h.machine_id = machine;
+        h.boot_id = boot;
+        h.header_size = htole64(sizeof(h));
+        h.start_usec = htole64(n * arg_interval);
+        h.interval_usec = htole64(arg_interval);
+        h.fsprg_secpar = htole16(FSPRG_RECOMMENDED_SECPAR);
+        h.fsprg_state_size = htole64(state_size);
+
+        l = loop_write(fd, &h, sizeof(h), false);
+        if (l < 0 || (size_t) l != sizeof(h)) {
+                log_error("Failed to write header: %s", strerror(EIO));
+                r = -EIO;
+                goto finish;
+        }
+
+        l = loop_write(fd, state, state_size, false);
+        if (l < 0 || (size_t) l != state_size) {
+                log_error("Failed to write state: %s", strerror(EIO));
+                r = -EIO;
+                goto finish;
+        }
+
+        if (link(k, p) < 0) {
+                log_error("Failed to link file: %m");
+                r = -errno;
+                goto finish;
+        }
+
+        if (on_tty()) {
+                fprintf(stderr,
+                        "\n"
+                        "The new key pair has been generated. The " ANSI_HIGHLIGHT_ON "secret sealing key" ANSI_HIGHLIGHT_OFF " has been written to\n"
+                        "the following local file. This key file is automatically updated when the\n"
+                        "sealing key is advanced. It should not be used on multiple hosts.\n"
+                        "\n"
+                        "\t%s\n"
+                        "\n"
+                        "Please write down the following " ANSI_HIGHLIGHT_ON "secret verification key" ANSI_HIGHLIGHT_OFF ". It should be stored\n"
+                        "at a safe location and should not be saved locally on disk.\n"
+                        "\n\t" ANSI_HIGHLIGHT_RED_ON, p);
+                fflush(stderr);
+        }
+        for (i = 0; i < seed_size; i++) {
+                if (i > 0 && i % 3 == 0)
+                        putchar('-');
+                printf("%02x", ((uint8_t*) seed)[i]);
+        }
+
+        printf("/%llx-%llx\n", (unsigned long long) n, (unsigned long long) arg_interval);
+
+        if (on_tty()) {
+                char tsb[FORMAT_TIMESPAN_MAX], *hn;
+
+                fprintf(stderr,
+                        ANSI_HIGHLIGHT_OFF "\n"
+                        "The sealing key is automatically changed every %s.\n",
+                        format_timespan(tsb, sizeof(tsb), arg_interval));
+
+                hn = gethostname_malloc();
+
+                if (hn) {
+                        hostname_cleanup(hn);
+                        fprintf(stderr, "\nThe keys have been generated for host %s/" SD_ID128_FORMAT_STR ".\n", hn, SD_ID128_FORMAT_VAL(machine));
+                } else
+                        fprintf(stderr, "\nThe keys have been generated for host " SD_ID128_FORMAT_STR ".\n", SD_ID128_FORMAT_VAL(machine));
+
+#ifdef HAVE_QRENCODE
+                /* If this is not an UTF-8 system don't print any QR codes */
+                if (is_locale_utf8()) {
+                        fputs("\nTo transfer the verification key to your phone please scan the QR code below:\n\n", stderr);
+                        print_qr_code(stderr, seed, seed_size, n, arg_interval, hn, machine);
+                }
+#endif
+                free(hn);
+        }
+
+        r = 0;
+
+finish:
+        if (fd >= 0)
+                close_nointr_nofail(fd);
+
+        if (k) {
+                unlink(k);
+                free(k);
+        }
+
+        free(p);
+
+        return r;
+#else
+        log_error("Forward-secure sealing not available.");
+        return -ENOTSUP;
+#endif
+}
+
+static int verify(sd_journal *j) {
+        int r = 0;
+        Iterator i;
+        JournalFile *f;
+
+        assert(j);
+
+        log_show_color(true);
+
+        HASHMAP_FOREACH(f, j->files, i) {
+                int k;
+                usec_t first, validated, last;
+
+#ifdef HAVE_GCRYPT
+                if (!arg_verify_key && JOURNAL_HEADER_SEALED(f->header))
+                        log_notice("Journal file %s has sealing enabled but verification key has not been passed using --verify-key=.", f->path);
+#endif
+
+                k = journal_file_verify(f, arg_verify_key, &first, &validated, &last, true);
+                if (k == -EINVAL) {
+                        /* If the key was invalid give up right-away. */
+                        return k;
+                } else if (k < 0) {
+                        log_warning("FAIL: %s (%s)", f->path, strerror(-k));
+                        r = k;
+                } else {
+                        char a[FORMAT_TIMESTAMP_MAX], b[FORMAT_TIMESTAMP_MAX], c[FORMAT_TIMESPAN_MAX];
+                        log_info("PASS: %s", f->path);
+
+                        if (arg_verify_key && JOURNAL_HEADER_SEALED(f->header)) {
+                                if (validated > 0) {
+                                        log_info("=> Validated from %s to %s, final %s entries not sealed.",
+                                                 format_timestamp(a, sizeof(a), first),
+                                                 format_timestamp(b, sizeof(b), validated),
+                                                 format_timespan(c, sizeof(c), last > validated ? last - validated : 0));
+                                } else if (last > 0)
+                                        log_info("=> No sealing yet, %s of entries not sealed.",
+                                                 format_timespan(c, sizeof(c), last - first));
+                                else
+                                        log_info("=> No sealing yet, no entries in file.");
+                        }
+                }
+        }
+
+        return r;
+}
+
+static int access_check(void) {
+
+#ifdef HAVE_ACL
+        if (access("/var/log/journal", F_OK) < 0 && geteuid() != 0 && in_group("adm") <= 0) {
+                log_error("Unprivileged users can't see messages unless persistent log storage is enabled. Users in the group 'adm' can always see messages.");
+                return -EACCES;
+        }
+
+        if (!arg_quiet && geteuid() != 0 && in_group("adm") <= 0)
+                log_warning("Showing user generated messages only. Users in the group 'adm' can see all messages. Pass -q to turn this notice off.");
+#else
+        if (geteuid() != 0 && in_group("adm") <= 0) {
+                log_error("No access to messages. Only users in the group 'adm' can see messages.");
+                return -EACCES;
+        }
+#endif
+
+        return 0;
+}
+
+int main(int argc, char *argv[]) {
+        int r;
+        sd_journal *j = NULL;
+        bool need_seek = false;
+        sd_id128_t previous_boot_id;
+        bool previous_boot_id_valid = false;
+        unsigned n_shown = 0;
+
+        setlocale(LC_ALL, "");
+        log_parse_environment();
+        log_open();
+
+        r = parse_argv(argc, argv);
+        if (r <= 0)
+                goto finish;
+
+        signal(SIGWINCH, columns_lines_cache_reset);
+
+        if (arg_action == ACTION_NEW_ID128) {
+                r = generate_new_id128();
+                goto finish;
+        }
+
+        if (arg_action == ACTION_SETUP_KEYS) {
+                r = setup_keys();
+                goto finish;
+        }
+
+        r = access_check();
+        if (r < 0)
+                goto finish;
+
+        if (arg_directory)
+                r = sd_journal_open_directory(&j, arg_directory, 0);
+        else
+                r = sd_journal_open(&j, arg_merge ? 0 : SD_JOURNAL_LOCAL_ONLY);
+        if (r < 0) {
+                log_error("Failed to open journal: %s", strerror(-r));
+                goto finish;
+        }
+
+        if (arg_action == ACTION_VERIFY) {
+                r = verify(j);
+                goto finish;
+        }
+
+        if (arg_action == ACTION_PRINT_HEADER) {
+                journal_print_header(j);
+                r = 0;
+                goto finish;
+        }
+
+        if (arg_action == ACTION_DISK_USAGE) {
+                uint64_t bytes;
+                char sbytes[FORMAT_BYTES_MAX];
+
+                r = sd_journal_get_usage(j, &bytes);
+                if (r < 0)
+                        goto finish;
+
+                printf("Journals take up %s on disk.\n", format_bytes(sbytes, sizeof(sbytes), bytes));
+                r = 0;
+                goto finish;
+        }
+
+        r = add_this_boot(j);
+        if (r < 0)
+                goto finish;
+
+        r = add_unit(j);
+        if (r < 0)
+                goto finish;
+
+        r = add_matches(j, argv + optind);
+        if (r < 0)
+                goto finish;
+
+        r = add_priorities(j);
+        if (r < 0)
+                goto finish;
+
+        if (arg_field) {
+                const void *data;
+                size_t size;
+
+                r = sd_journal_query_unique(j, arg_field);
+                if (r < 0) {
+                        log_error("Failed to query unique data objects: %s", strerror(-r));
+                        goto finish;
+                }
+
+                SD_JOURNAL_FOREACH_UNIQUE(j, data, size) {
+                        const void *eq;
+
+                        if (arg_lines > 0 && n_shown >= arg_lines)
+                                break;
+
+                        eq = memchr(data, '=', size);
+                        if (eq)
+                                printf("%.*s\n", (int) (size - ((const uint8_t*) eq - (const uint8_t*) data + 1)), (const char*) eq + 1);
+                        else
+                                printf("%.*s\n", (int) size, (const char*) data);
+
+                        n_shown ++;
+                }
+
+                r = 0;
+                goto finish;
+        }
+
+        if (arg_cursor) {
+                r = sd_journal_seek_cursor(j, arg_cursor);
+                if (r < 0) {
+                        log_error("Failed to seek to cursor: %s", strerror(-r));
+                        goto finish;
+                }
+
+                r = sd_journal_next(j);
+
+        } else if (arg_since_set) {
+                r = sd_journal_seek_realtime_usec(j, arg_since);
+                if (r < 0) {
+                        log_error("Failed to seek to date: %s", strerror(-r));
+                        goto finish;
+                }
+                r = sd_journal_next(j);
+
+        } else if (arg_lines > 0) {
+                r = sd_journal_seek_tail(j);
+                if (r < 0) {
+                        log_error("Failed to seek to tail: %s", strerror(-r));
+                        goto finish;
+                }
+
+                r = sd_journal_previous_skip(j, arg_lines);
+
+        } else {
+                r = sd_journal_seek_head(j);
+                if (r < 0) {
+                        log_error("Failed to seek to head: %s", strerror(-r));
+                        goto finish;
+                }
+
+                r = sd_journal_next(j);
+        }
+
+        if (r < 0) {
+                log_error("Failed to iterate through journal: %s", strerror(-r));
+                goto finish;
+        }
+
+        if (!arg_no_pager && !arg_follow)
+                pager_open();
+
+        if (!arg_quiet) {
+                usec_t start, end;
+                char start_buf[FORMAT_TIMESTAMP_MAX], end_buf[FORMAT_TIMESTAMP_MAX];
+
+                r = sd_journal_get_cutoff_realtime_usec(j, &start, &end);
+                if (r < 0) {
+                        log_error("Failed to get cutoff: %s", strerror(-r));
+                        goto finish;
+                }
+
+                if (r > 0) {
+                        if (arg_follow)
+                                printf("-- Logs begin at %s. --\n",
+                                       format_timestamp(start_buf, sizeof(start_buf), start));
+                        else
+                                printf("-- Logs begin at %s, end at %s. --\n",
+                                       format_timestamp(start_buf, sizeof(start_buf), start),
+                                       format_timestamp(end_buf, sizeof(end_buf), end));
+                }
+        }
+
+        for (;;) {
+                while (arg_lines == 0 || arg_follow || n_shown < arg_lines) {
+                        int flags;
+
+                        if (need_seek) {
+                                r = sd_journal_next(j);
+                                if (r < 0) {
+                                        log_error("Failed to iterate through journal: %s", strerror(-r));
+                                        goto finish;
+                                }
+                        }
+
+                        if (r == 0)
+                                break;
+
+                        if (arg_until_set) {
+                                usec_t usec;
+
+                                r = sd_journal_get_realtime_usec(j, &usec);
+                                if (r < 0) {
+                                        log_error("Failed to determine timestamp: %s", strerror(-r));
+                                        goto finish;
+                                }
+                        }
+
+                        if (!arg_merge) {
+                                sd_id128_t boot_id;
+
+                                r = sd_journal_get_monotonic_usec(j, NULL, &boot_id);
+                                if (r >= 0) {
+                                        if (previous_boot_id_valid &&
+                                            !sd_id128_equal(boot_id, previous_boot_id))
+                                                printf(ANSI_HIGHLIGHT_ON "-- Reboot --" ANSI_HIGHLIGHT_OFF "\n");
+
+                                        previous_boot_id = boot_id;
+                                        previous_boot_id_valid = true;
+                                }
+                        }
+
+                        flags =
+                                arg_all * OUTPUT_SHOW_ALL |
+                                (!on_tty() || pager_have()) * OUTPUT_FULL_WIDTH |
+                                on_tty() * OUTPUT_COLOR;
+
+                        r = output_journal(stdout, j, arg_output, 0, flags);
+                        if (r < 0)
+                                goto finish;
+
+                        need_seek = true;
+                        n_shown++;
+                }
+
+                if (!arg_follow)
+                        break;
+
+                r = sd_journal_wait(j, (uint64_t) -1);
+                if (r < 0) {
+                        log_error("Couldn't wait for journal event: %s", strerror(-r));
+                        goto finish;
+                }
+        }
+
+finish:
+        if (j)
+                sd_journal_close(j);
+
+        pager_close();
+
+        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}