/*-*- 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 <fnmatch.h> #include <errno.h> #include <stddef.h> #include <string.h> #include <stdio.h> #include <unistd.h> #include <stdlib.h> #include <time.h> #include <getopt.h> #include <signal.h> #include <sys/stat.h> #include <sys/ioctl.h> #include <linux/fs.h> #ifdef HAVE_ACL #include <sys/acl.h> #include "acl-util.h" #endif #include <systemd/sd-journal.h> #include "log.h" #include "logs-show.h" #include "util.h" #include "path-util.h" #include "fileio.h" #include "build.h" #include "pager.h" #include "strv.h" #include "set.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" #include "catalog.h" #define DEFAULT_FSS_INTERVAL_USEC (15*USEC_PER_MINUTE) static OutputMode arg_output = OUTPUT_SHORT; static bool arg_pager_end = false; static bool arg_follow = false; static bool arg_full = true; static bool arg_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_merge = false; static bool arg_boot = false; static sd_id128_t arg_boot_id = {}; static int arg_boot_offset = 0; static bool arg_dmesg = false; static const char *arg_cursor = NULL; static const char *arg_after_cursor = NULL; static bool arg_show_cursor = false; static const char *arg_directory = NULL; static char **arg_file = 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; static bool arg_force = false; #endif static usec_t arg_since, arg_until; static bool arg_since_set = false, arg_until_set = false; static char **arg_system_units = NULL; static char **arg_user_units = NULL; static const char *arg_field = NULL; static bool arg_catalog = false; static bool arg_reverse = false; static int arg_journal_type = 0; static const char *arg_root = NULL; static const char *arg_machine = NULL; static enum { ACTION_SHOW, ACTION_NEW_ID128, ACTION_PRINT_HEADER, ACTION_SETUP_KEYS, ACTION_VERIFY, ACTION_DISK_USAGE, ACTION_LIST_CATALOG, ACTION_DUMP_CATALOG, ACTION_UPDATE_CATALOG, ACTION_LIST_BOOTS, } arg_action = ACTION_SHOW; typedef struct boot_id_t { sd_id128_t id; uint64_t first; uint64_t last; } boot_id_t; static void pager_open_if_enabled(void) { if (arg_no_pager) return; pager_open(arg_pager_end); } static int parse_boot_descriptor(const char *x, sd_id128_t *boot_id, int *offset) { sd_id128_t id = SD_ID128_NULL; int off = 0, r; if (strlen(x) >= 32) { char *t; t = strndupa(x, 32); r = sd_id128_from_string(t, &id); if (r >= 0) x += 32; if (*x != '-' && *x != '+' && *x != 0) return -EINVAL; if (*x != 0) { r = safe_atoi(x, &off); if (r < 0) return r; } } else { r = safe_atoi(x, &off); if (r < 0) return r; } if (boot_id) *boot_id = id; if (offset) *offset = off; return 0; } static int help(void) { pager_open_if_enabled(); printf("%s [OPTIONS...] [MATCHES...]\n\n" "Query the journal.\n\n" "Flags:\n" " --system Show only the system journal\n" " --user Show only the user journal for the current user\n" " -M --machine=CONTAINER Operate on local container\n" " --since=DATE Start showing entries on or newer than the specified date\n" " --until=DATE Stop showing entries on or older than the specified date\n" " -c --cursor=CURSOR Start showing entries from the specified cursor\n" " --after-cursor=CURSOR Start showing entries from after the specified cursor\n" " --show-cursor Print the cursor after all the entries\n" " -b --boot[=ID] Show data only from ID or, if unspecified, the current boot\n" " --list-boots Show terse information about recorded boots\n" " -k --dmesg Show kernel message log from the current boot\n" " -u --unit=UNIT Show data only from the specified unit\n" " --user-unit=UNIT Show data only from the specified user session unit\n" " -p --priority=RANGE Show only messages within the specified priority range\n" " -e --pager-end Immediately jump to end of the journal in the pager\n" " -f --follow Follow the journal\n" " -n --lines[=INTEGER] Number of journal entries to show\n" " --no-tail Show all lines, even in follow mode\n" " -r --reverse Show the newest entries first\n" " -o --output=STRING Change journal output mode (short, short-iso,\n" " short-precise, short-monotonic, verbose,\n" " export, json, json-pretty, json-sse, cat)\n" " -x --catalog Add message explanations where available\n" " --no-full Ellipsize fields\n" " -a --all Show all fields, including long and unprintable\n" " -q --quiet Do not 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" " --file=PATH Show journal file\n" " --root=ROOT Operate on catalog files underneath the root ROOT\n" #ifdef HAVE_GCRYPT " --interval=TIME Time interval for changing the FSS sealing key\n" " --verify-key=KEY Specify FSS verification key\n" " --force Force overriding of the FSS key pair with --setup-keys\n" #endif "\nCommands:\n" " -h --help Show this help text\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 of all journal files\n" " -F --field=FIELD List all values that a specified field takes\n" " --list-catalog Show message IDs of all entries in the message catalog\n" " --dump-catalog Show entries in the message catalog\n" " --update-catalog Update the message catalog database\n" #ifdef HAVE_GCRYPT " --setup-keys Generate a 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_FULL, ARG_NO_TAIL, ARG_NEW_ID128, ARG_LIST_BOOTS, ARG_USER, ARG_SYSTEM, ARG_ROOT, ARG_HEADER, ARG_SETUP_KEYS, ARG_FILE, ARG_INTERVAL, ARG_VERIFY, ARG_VERIFY_KEY, ARG_DISK_USAGE, ARG_SINCE, ARG_UNTIL, ARG_AFTER_CURSOR, ARG_SHOW_CURSOR, ARG_USER_UNIT, ARG_LIST_CATALOG, ARG_DUMP_CATALOG, ARG_UPDATE_CATALOG, ARG_FORCE, }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "version" , no_argument, NULL, ARG_VERSION }, { "no-pager", no_argument, NULL, ARG_NO_PAGER }, { "pager-end", no_argument, NULL, 'e' }, { "follow", no_argument, NULL, 'f' }, { "force", no_argument, NULL, ARG_FORCE }, { "output", required_argument, NULL, 'o' }, { "all", no_argument, NULL, 'a' }, { "full", no_argument, NULL, 'l' }, { "no-full", no_argument, NULL, ARG_NO_FULL }, { "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' }, { "boot", optional_argument, NULL, 'b' }, { "list-boots", no_argument, NULL, ARG_LIST_BOOTS }, { "this-boot", optional_argument, NULL, 'b' }, /* deprecated */ { "dmesg", no_argument, NULL, 'k' }, { "system", no_argument, NULL, ARG_SYSTEM }, { "user", no_argument, NULL, ARG_USER }, { "directory", required_argument, NULL, 'D' }, { "file", required_argument, NULL, ARG_FILE }, { "root", required_argument, NULL, ARG_ROOT }, { "header", no_argument, NULL, ARG_HEADER }, { "priority", required_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' }, { "after-cursor", required_argument, NULL, ARG_AFTER_CURSOR }, { "show-cursor", no_argument, NULL, ARG_SHOW_CURSOR }, { "since", required_argument, NULL, ARG_SINCE }, { "until", required_argument, NULL, ARG_UNTIL }, { "unit", required_argument, NULL, 'u' }, { "user-unit", required_argument, NULL, ARG_USER_UNIT }, { "field", required_argument, NULL, 'F' }, { "catalog", no_argument, NULL, 'x' }, { "list-catalog", no_argument, NULL, ARG_LIST_CATALOG }, { "dump-catalog", no_argument, NULL, ARG_DUMP_CATALOG }, { "update-catalog", no_argument, NULL, ARG_UPDATE_CATALOG }, { "reverse", no_argument, NULL, 'r' }, { "machine", required_argument, NULL, 'M' }, {} }; int c, r; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "hefo:aln::qmb::kD:p:c:u:F:xrM:", options, NULL)) >= 0) { switch (c) { case 'h': return help(); case ARG_VERSION: puts(PACKAGE_STRING); puts(SYSTEMD_FEATURES); return 0; case ARG_NO_PAGER: arg_no_pager = true; break; case 'e': arg_pager_end = true; if (arg_lines < 0) arg_lines = 1000; 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 'l': arg_full = true; break; case ARG_NO_FULL: arg_full = false; break; case 'a': arg_all = true; break; case 'n': if (optarg) { r = safe_atoi(optarg, &arg_lines); if (r < 0 || arg_lines < 0) { log_error("Failed to parse lines '%s'", optarg); return -EINVAL; } } else { int n; /* Hmm, no argument? Maybe the next * word on the command line is * supposed to be the argument? Let's * see if there is one, and is * parsable as a positive * integer... */ if (optind < argc && safe_atoi(argv[optind], &n) >= 0 && n >= 0) { arg_lines = n; optind++; } 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_boot = true; if (optarg) { r = parse_boot_descriptor(optarg, &arg_boot_id, &arg_boot_offset); if (r < 0) { log_error("Failed to parse boot descriptor '%s'", optarg); return -EINVAL; } } else { /* Hmm, no argument? Maybe the next * word on the command line is * supposed to be the argument? Let's * see if there is one and is parsable * as a boot descriptor... */ if (optind < argc && parse_boot_descriptor(argv[optind], &arg_boot_id, &arg_boot_offset) >= 0) optind++; } break; case ARG_LIST_BOOTS: arg_action = ACTION_LIST_BOOTS; break; case 'k': arg_boot = arg_dmesg = true; break; case ARG_SYSTEM: arg_journal_type |= SD_JOURNAL_SYSTEM; break; case ARG_USER: arg_journal_type |= SD_JOURNAL_CURRENT_USER; break; case 'M': arg_machine = optarg; break; case 'D': arg_directory = optarg; break; case ARG_FILE: r = glob_extend(&arg_file, optarg); if (r < 0) { log_error("Failed to add paths: %s", strerror(-r)); return r; }; break; case ARG_ROOT: arg_root = optarg; break; case 'c': arg_cursor = optarg; break; case ARG_AFTER_CURSOR: arg_after_cursor = optarg; break; case ARG_SHOW_CURSOR: arg_show_cursor = true; 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_FORCE: arg_force = true; break; 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_sec(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: case ARG_FORCE: 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': r = strv_extend(&arg_system_units, optarg); if (r < 0) return log_oom(); break; case ARG_USER_UNIT: r = strv_extend(&arg_user_units, optarg); if (r < 0) return log_oom(); break; case 'F': arg_field = optarg; break; case 'x': arg_catalog = true; break; case ARG_LIST_CATALOG: arg_action = ACTION_LIST_CATALOG; break; case ARG_DUMP_CATALOG: arg_action = ACTION_DUMP_CATALOG; break; case ARG_UPDATE_CATALOG: arg_action = ACTION_UPDATE_CATALOG; break; case 'r': arg_reverse = true; break; case '?': return -EINVAL; default: assert_not_reached("Unhandled option"); } } if (arg_follow && !arg_no_tail && arg_lines < 0) arg_lines = 10; if (!!arg_directory + !!arg_file + !!arg_machine > 1) { log_error("Please specify either -D/--directory= or --file= or -M/--machine=, not more than one."); return -EINVAL; } if (arg_since_set && arg_until_set && arg_since > arg_until) { log_error("--since= must be before --until=."); return -EINVAL; } if (!!arg_cursor + !!arg_after_cursor + !!arg_since_set > 1) { log_error("Please specify only one of --since=, --cursor=, and --after-cursor."); return -EINVAL; } if (arg_follow && arg_reverse) { log_error("Please specify either --reverse= or --follow=, not both."); return -EINVAL; } if (arg_action != ACTION_SHOW && optind < argc) { log_error("Extraneous arguments starting with '%s'", argv[optind]); 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\n", stdout); printf("As Python constant:\n" ">>> import uuid\n" ">>> MESSAGE_XYZ = uuid.UUID('" SD_ID128_FORMAT_STR "')\n", SD_ID128_FORMAT_VAL(id)); return 0; } static int add_matches(sd_journal *j, char **args) { char **i; assert(j); STRV_FOREACH(i, args) { int r; if (streq(*i, "+")) r = sd_journal_add_disjunction(j); else if (path_is_absolute(*i)) { _cleanup_free_ char *p, *t = NULL, *t2 = NULL; const char *path; _cleanup_free_ char *interpreter = NULL; struct stat st; p = canonicalize_file_name(*i); path = p ? p : *i; if (stat(path, &st) < 0) { log_error("Couldn't stat file: %m"); return -errno; } if (S_ISREG(st.st_mode) && (0111 & st.st_mode)) { if (executable_is_script(path, &interpreter) > 0) { _cleanup_free_ char *comm; comm = strndup(basename(path), 15); if (!comm) return log_oom(); t = strappend("_COMM=", comm); /* Append _EXE only if the interpreter is not a link. Otherwise, it might be outdated often. */ if (lstat(interpreter, &st) == 0 && !S_ISLNK(st.st_mode)) { t2 = strappend("_EXE=", interpreter); if (!t2) return log_oom(); } } else 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 { log_error("File is neither a device node, nor regular file, nor executable: %s", *i); return -EINVAL; } if (!t) return log_oom(); r = sd_journal_add_match(j, t, 0); if (t2) r = sd_journal_add_match(j, t2, 0); } 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 boot_id_cmp(const void *a, const void *b) { uint64_t _a, _b; _a = ((const boot_id_t *)a)->first; _b = ((const boot_id_t *)b)->first; return _a < _b ? -1 : (_a > _b ? 1 : 0); } static int list_boots(sd_journal *j) { int r; const void *data; unsigned int count = 0; int w, i; size_t length, allocated = 0; boot_id_t *id; _cleanup_free_ boot_id_t *all_ids = NULL; r = sd_journal_query_unique(j, "_BOOT_ID"); if (r < 0) return r; SD_JOURNAL_FOREACH_UNIQUE(j, data, length) { if (length < strlen("_BOOT_ID=")) continue; if (!GREEDY_REALLOC(all_ids, allocated, count + 1)) return log_oom(); id = &all_ids[count]; r = sd_id128_from_string(((const char *)data) + strlen("_BOOT_ID="), &id->id); if (r < 0) continue; r = sd_journal_add_match(j, data, length); if (r < 0) return r; r = sd_journal_seek_head(j); if (r < 0) return r; r = sd_journal_next(j); if (r < 0) return r; else if (r == 0) goto flush; r = sd_journal_get_realtime_usec(j, &id->first); if (r < 0) return r; r = sd_journal_seek_tail(j); if (r < 0) return r; r = sd_journal_previous(j); if (r < 0) return r; else if (r == 0) goto flush; r = sd_journal_get_realtime_usec(j, &id->last); if (r < 0) return r; count++; flush: sd_journal_flush_matches(j); } qsort_safe(all_ids, count, sizeof(boot_id_t), boot_id_cmp); /* numbers are one less, but we need an extra char for the sign */ w = DECIMAL_STR_WIDTH(count - 1) + 1; for (id = all_ids, i = 0; id < all_ids + count; id++, i++) { char a[FORMAT_TIMESTAMP_MAX], b[FORMAT_TIMESTAMP_MAX]; printf("% *i " SD_ID128_FORMAT_STR " %s—%s\n", w, i - count + 1, SD_ID128_FORMAT_VAL(id->id), format_timestamp(a, sizeof(a), id->first), format_timestamp(b, sizeof(b), id->last)); } return 0; } static int get_relative_boot_id(sd_journal *j, sd_id128_t *boot_id, int relative) { int r; const void *data; unsigned int count = 0; size_t length, allocated = 0; boot_id_t ref_boot_id = {SD_ID128_NULL}, *id; _cleanup_free_ boot_id_t *all_ids = NULL; assert(j); assert(boot_id); r = sd_journal_query_unique(j, "_BOOT_ID"); if (r < 0) return r; SD_JOURNAL_FOREACH_UNIQUE(j, data, length) { if (length < strlen("_BOOT_ID=")) continue; if (!GREEDY_REALLOC(all_ids, allocated, count + 1)) return log_oom(); id = &all_ids[count]; r = sd_id128_from_string(((const char *)data) + strlen("_BOOT_ID="), &id->id); if (r < 0) continue; r = sd_journal_add_match(j, data, length); if (r < 0) return r; r = sd_journal_seek_head(j); if (r < 0) return r; r = sd_journal_next(j); if (r < 0) return r; else if (r == 0) goto flush; r = sd_journal_get_realtime_usec(j, &id->first); if (r < 0) return r; if (sd_id128_equal(id->id, *boot_id)) ref_boot_id = *id; count++; flush: sd_journal_flush_matches(j); } qsort_safe(all_ids, count, sizeof(boot_id_t), boot_id_cmp); if (sd_id128_equal(*boot_id, SD_ID128_NULL)) { if (relative > (int) count || relative <= -(int)count) return -EADDRNOTAVAIL; *boot_id = all_ids[(relative <= 0)*count + relative - 1].id; } else { id = bsearch(&ref_boot_id, all_ids, count, sizeof(boot_id_t), boot_id_cmp); if (!id || relative <= 0 ? (id - all_ids) + relative < 0 : (id - all_ids) + relative >= (int) count) return -EADDRNOTAVAIL; *boot_id = (id + relative)->id; } return 0; } static int add_boot(sd_journal *j) { char match[9+32+1] = "_BOOT_ID="; int r; assert(j); if (!arg_boot) return 0; if (arg_boot_offset == 0 && sd_id128_equal(arg_boot_id, SD_ID128_NULL)) return add_match_this_boot(j, arg_machine); r = get_relative_boot_id(j, &arg_boot_id, arg_boot_offset); if (r < 0) { if (sd_id128_equal(arg_boot_id, SD_ID128_NULL)) log_error("Failed to look up boot %+i: %s", arg_boot_offset, strerror(-r)); else log_error("Failed to look up boot ID "SD_ID128_FORMAT_STR"%+i: %s", SD_ID128_FORMAT_VAL(arg_boot_id), arg_boot_offset, strerror(-r)); return r; } sd_id128_to_string(arg_boot_id, match + 9); r = sd_journal_add_match(j, match, sizeof(match) - 1); if (r < 0) { log_error("Failed to add match: %s", strerror(-r)); return r; } r = sd_journal_add_conjunction(j); if (r < 0) return r; return 0; } static int add_dmesg(sd_journal *j) { int r; assert(j); if (!arg_dmesg) return 0; r = sd_journal_add_match(j, "_TRANSPORT=kernel", strlen("_TRANSPORT=kernel")); if (r < 0) { log_error("Failed to add match: %s", strerror(-r)); return r; } r = sd_journal_add_conjunction(j); if (r < 0) return r; return 0; } static int get_possible_units(sd_journal *j, const char *fields, char **patterns, Set **units) { _cleanup_set_free_free_ Set *found; const char *field; int r; found = set_new(string_hash_func, string_compare_func); if (!found) return log_oom(); NULSTR_FOREACH(field, fields) { const void *data; size_t size; r = sd_journal_query_unique(j, field); if (r < 0) return r; SD_JOURNAL_FOREACH_UNIQUE(j, data, size) { char **pattern, *eq; size_t prefix; _cleanup_free_ char *u = NULL; eq = memchr(data, '=', size); if (eq) prefix = eq - (char*) data + 1; else prefix = 0; u = strndup((char*) data + prefix, size - prefix); if (!u) return log_oom(); STRV_FOREACH(pattern, patterns) if (fnmatch(*pattern, u, FNM_NOESCAPE) == 0) { log_debug("Matched %s with pattern %s=%s", u, field, *pattern); r = set_consume(found, u); u = NULL; if (r < 0 && r != -EEXIST) return r; break; } } } *units = found; found = NULL; return 0; } /* This list is supposed to return the superset of unit names * possibly matched by rules added with add_matches_for_unit... */ #define SYSTEM_UNITS \ "_SYSTEMD_UNIT\0" \ "COREDUMP_UNIT\0" \ "UNIT\0" \ "OBJECT_SYSTEMD_UNIT\0" \ "_SYSTEMD_SLICE\0" /* ... and add_matches_for_user_unit */ #define USER_UNITS \ "_SYSTEMD_USER_UNIT\0" \ "USER_UNIT\0" \ "COREDUMP_USER_UNIT\0" \ "OBJECT_SYSTEMD_USER_UNIT\0" static int add_units(sd_journal *j) { _cleanup_strv_free_ char **patterns = NULL; int r, count = 0; char **i; assert(j); STRV_FOREACH(i, arg_system_units) { _cleanup_free_ char *u = NULL; u = unit_name_mangle(*i, MANGLE_GLOB); if (!u) return log_oom(); if (string_is_glob(u)) { r = strv_push(&patterns, u); if (r < 0) return r; u = NULL; } else { r = add_matches_for_unit(j, u); if (r < 0) return r; r = sd_journal_add_disjunction(j); if (r < 0) return r; count ++; } } if (!strv_isempty(patterns)) { _cleanup_set_free_free_ Set *units = NULL; Iterator it; char *u; r = get_possible_units(j, SYSTEM_UNITS, patterns, &units); if (r < 0) return r; SET_FOREACH(u, units, it) { r = add_matches_for_unit(j, u); if (r < 0) return r; r = sd_journal_add_disjunction(j); if (r < 0) return r; count ++; } } strv_free(patterns); patterns = NULL; STRV_FOREACH(i, arg_user_units) { _cleanup_free_ char *u = NULL; u = unit_name_mangle(*i, MANGLE_GLOB); if (!u) return log_oom(); if (string_is_glob(u)) { r = strv_push(&patterns, u); if (r < 0) return r; u = NULL; } else { r = add_matches_for_user_unit(j, u, getuid()); if (r < 0) return r; r = sd_journal_add_disjunction(j); if (r < 0) return r; count ++; } } if (!strv_isempty(patterns)) { _cleanup_set_free_free_ Set *units = NULL; Iterator it; char *u; r = get_possible_units(j, USER_UNITS, patterns, &units); if (r < 0) return r; SET_FOREACH(u, units, it) { r = add_matches_for_user_unit(j, u, getuid()); if (r < 0) return r; r = sd_journal_add_disjunction(j); if (r < 0) return r; count ++; } } /* Complain if the user request matches but nothing whatsoever was * found, since otherwise everything would be matched. */ if (!(strv_isempty(arg_system_units) && strv_isempty(arg_user_units)) && count == 0) return -ENODATA; r = sd_journal_add_conjunction(j); if (r < 0) 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; } } r = sd_journal_add_conjunction(j); if (r < 0) 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; struct stat st; r = stat("/var/log/journal", &st); if (r < 0 && errno != ENOENT && errno != ENOTDIR) { log_error("stat(\"%s\") failed: %m", "/var/log/journal"); return -errno; } if (r < 0 || !S_ISDIR(st.st_mode)) { log_error("%s is not a directory, must be using persistent logging for FSS.", "/var/log/journal"); return r < 0 ? -errno : -ENOTDIR; } 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) { if (arg_force) { r = unlink(p); if (r < 0) { log_error("unlink(\"%s\") failed: %m", p); r = -errno; goto finish; } } else { log_error("Sealing key file %s exists already. (--force to recreate)", 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; safe_close(fd); fd = mkostemp_safe(k, O_WRONLY|O_CLOEXEC); 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, 0)); hn = gethostname_malloc(); if (hn) { hostname_cleanup(hn, false); 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: safe_close(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, 0)); } else if (last > 0) log_info("=> No sealing yet, %s of entries not sealed.", format_timespan(c, sizeof(c), last - first, 0)); else log_info("=> No sealing yet, no entries in file."); } } } return r; } #ifdef HAVE_ACL static int access_check_var_log_journal(sd_journal *j) { _cleanup_strv_free_ char **g = NULL; bool have_access; int r; assert(j); have_access = in_group("systemd-journal") > 0; if (!have_access) { /* Let's enumerate all groups from the default ACL of * the directory, which generally should allow access * to most journal files too */ r = search_acl_groups(&g, "/var/log/journal/", &have_access); if (r < 0) return r; } if (!have_access) { if (strv_isempty(g)) log_notice("Hint: You are currently not seeing messages from other users and the system.\n" " Users in the 'systemd-journal' group can see all messages. Pass -q to\n" " turn off this notice."); else { _cleanup_free_ char *s = NULL; r = strv_extend(&g, "systemd-journal"); if (r < 0) return log_oom(); strv_sort(g); strv_uniq(g); s = strv_join(g, "', '"); if (!s) return log_oom(); log_notice("Hint: You are currently not seeing messages from other users and the system.\n" " Users in the groups '%s' can see all messages.\n" " Pass -q to turn off this notice.", s); } } return 0; } #endif static int access_check(sd_journal *j) { Iterator it; void *code; int r = 0; assert(j); if (set_isempty(j->errors)) { if (hashmap_isempty(j->files)) log_notice("No journal files were found."); return 0; } if (set_contains(j->errors, INT_TO_PTR(-EACCES))) { #ifdef HAVE_ACL /* If /var/log/journal doesn't even exist, * unprivileged users have no access at all */ if (access("/var/log/journal", F_OK) < 0 && geteuid() != 0 && in_group("systemd-journal") <= 0) { log_error("Unprivileged users cannot access messages, unless persistent log storage is\n" "enabled. Users in the 'systemd-journal' group may always access messages."); return -EACCES; } /* If /var/log/journal exists, try to pring a nice notice if the user lacks access to it */ if (!arg_quiet && geteuid() != 0) { r = access_check_var_log_journal(j); if (r < 0) return r; } #else if (geteuid() != 0 && in_group("systemd-journal") <= 0) { log_error("Unprivileged users cannot access messages. Users in the 'systemd-journal' group\n" "group may access messages."); return -EACCES; } #endif if (hashmap_isempty(j->files)) { log_error("No journal files were opened due to insufficient permissions."); r = -EACCES; } } SET_FOREACH(code, j->errors, it) { int err; err = -PTR_TO_INT(code); assert(err > 0); if (err != EACCES) log_warning("Error was encountered while opening journal files: %s", strerror(err)); } return r; } int main(int argc, char *argv[]) { int r; _cleanup_journal_close_ sd_journal *j = NULL; bool need_seek = false; sd_id128_t previous_boot_id; bool previous_boot_id_valid = false, first_line = true; int n_shown = 0; bool ellipsized = false; 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; } if (arg_action == ACTION_UPDATE_CATALOG || arg_action == ACTION_LIST_CATALOG || arg_action == ACTION_DUMP_CATALOG) { const char* database = CATALOG_DATABASE; _cleanup_free_ char *copy = NULL; if (arg_root) { copy = strjoin(arg_root, "/", CATALOG_DATABASE, NULL); if (!copy) { r = log_oom(); goto finish; } path_kill_slashes(copy); database = copy; } if (arg_action == ACTION_UPDATE_CATALOG) { r = catalog_update(database, arg_root, catalog_file_dirs); if (r < 0) log_error("Failed to list catalog: %s", strerror(-r)); } else { bool oneline = arg_action == ACTION_LIST_CATALOG; if (optind < argc) r = catalog_list_items(stdout, database, oneline, argv + optind); else r = catalog_list(stdout, database, oneline); if (r < 0) log_error("Failed to list catalog: %s", strerror(-r)); } goto finish; } if (arg_directory) r = sd_journal_open_directory(&j, arg_directory, arg_journal_type); else if (arg_file) r = sd_journal_open_files(&j, (const char**) arg_file, 0); else if (arg_machine) r = sd_journal_open_container(&j, arg_machine, 0); else r = sd_journal_open(&j, !arg_merge*SD_JOURNAL_LOCAL_ONLY + arg_journal_type); if (r < 0) { log_error("Failed to open %s: %s", arg_directory ? arg_directory : arg_file ? "files" : "journal", strerror(-r)); return EXIT_FAILURE; } r = access_check(j); if (r < 0) return EXIT_FAILURE; if (arg_action == ACTION_VERIFY) { r = verify(j); goto finish; } if (arg_action == ACTION_PRINT_HEADER) { journal_print_header(j); return EXIT_SUCCESS; } if (arg_action == ACTION_DISK_USAGE) { uint64_t bytes = 0; char sbytes[FORMAT_BYTES_MAX]; r = sd_journal_get_usage(j, &bytes); if (r < 0) return EXIT_FAILURE; printf("Journals take up %s on disk.\n", format_bytes(sbytes, sizeof(sbytes), bytes)); return EXIT_SUCCESS; } if (arg_action == ACTION_LIST_BOOTS) { r = list_boots(j); goto finish; } /* add_boot() must be called first! * It may need to seek the journal to find parent boot IDs. */ r = add_boot(j); if (r < 0) return EXIT_FAILURE; r = add_dmesg(j); if (r < 0) return EXIT_FAILURE; r = add_units(j); strv_free(arg_system_units); strv_free(arg_user_units); if (r < 0) { log_error("Failed to add filter for units: %s", strerror(-r)); return EXIT_FAILURE; } r = add_priorities(j); if (r < 0) { log_error("Failed to add filter for priorities: %s", strerror(-r)); return EXIT_FAILURE; } r = add_matches(j, argv + optind); if (r < 0) { log_error("Failed to add filters: %s", strerror(-r)); return EXIT_FAILURE; } if (_unlikely_(log_get_max_level() >= LOG_PRI(LOG_DEBUG))) { _cleanup_free_ char *filter; filter = journal_make_match_string(j); log_debug("Journal filter: %s", filter); } if (arg_field) { const void *data; size_t size; r = sd_journal_set_data_threshold(j, 0); if (r < 0) { log_error("Failed to unset data size threshold"); return EXIT_FAILURE; } r = sd_journal_query_unique(j, arg_field); if (r < 0) { log_error("Failed to query unique data objects: %s", strerror(-r)); return EXIT_FAILURE; } 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 ++; } return EXIT_SUCCESS; } /* Opening the fd now means the first sd_journal_wait() will actually wait */ if (arg_follow) { r = sd_journal_get_fd(j); if (r < 0) return EXIT_FAILURE; } if (arg_cursor || arg_after_cursor) { r = sd_journal_seek_cursor(j, arg_cursor ? arg_cursor : arg_after_cursor); if (r < 0) { log_error("Failed to seek to cursor: %s", strerror(-r)); return EXIT_FAILURE; } if (!arg_reverse) r = sd_journal_next_skip(j, 1 + !!arg_after_cursor); else r = sd_journal_previous_skip(j, 1 + !!arg_after_cursor); if (arg_after_cursor && r < 2 && !arg_follow) /* We couldn't find the next entry after the cursor. */ arg_lines = 0; } else if (arg_since_set && !arg_reverse) { r = sd_journal_seek_realtime_usec(j, arg_since); if (r < 0) { log_error("Failed to seek to date: %s", strerror(-r)); return EXIT_FAILURE; } r = sd_journal_next(j); } else if (arg_until_set && arg_reverse) { r = sd_journal_seek_realtime_usec(j, arg_until); if (r < 0) { log_error("Failed to seek to date: %s", strerror(-r)); return EXIT_FAILURE; } r = sd_journal_previous(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)); return EXIT_FAILURE; } r = sd_journal_previous_skip(j, arg_lines); } else if (arg_reverse) { r = sd_journal_seek_tail(j); if (r < 0) { log_error("Failed to seek to tail: %s", strerror(-r)); return EXIT_FAILURE; } r = sd_journal_previous(j); } else { r = sd_journal_seek_head(j); if (r < 0) { log_error("Failed to seek to head: %s", strerror(-r)); return EXIT_FAILURE; } r = sd_journal_next(j); } if (r < 0) { log_error("Failed to iterate through journal: %s", strerror(-r)); return EXIT_FAILURE; } if (!arg_follow) pager_open_if_enabled(); 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 || n_shown < arg_lines || (arg_follow && !first_line)) { int flags; if (need_seek) { if (!arg_reverse) r = sd_journal_next(j); else r = sd_journal_previous(j); if (r < 0) { log_error("Failed to iterate through journal: %s", strerror(-r)); goto finish; } if (r == 0) break; } if (arg_until_set && !arg_reverse) { 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 (usec > arg_until) goto finish; } if (arg_since_set && arg_reverse) { 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 (usec < arg_since) 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("%s-- Reboot --%s\n", ansi_highlight(), ansi_highlight_off()); previous_boot_id = boot_id; previous_boot_id_valid = true; } } flags = arg_all * OUTPUT_SHOW_ALL | arg_full * OUTPUT_FULL_WIDTH | on_tty() * OUTPUT_COLOR | arg_catalog * OUTPUT_CATALOG; r = output_journal(stdout, j, arg_output, 0, flags, &ellipsized); need_seek = true; if (r == -EADDRNOTAVAIL) break; else if (r < 0 || ferror(stdout)) goto finish; n_shown++; } if (!arg_follow) { if (arg_show_cursor) { _cleanup_free_ char *cursor = NULL; r = sd_journal_get_cursor(j, &cursor); if (r < 0 && r != -EADDRNOTAVAIL) log_error("Failed to get cursor: %s", strerror(-r)); else if (r >= 0) printf("-- cursor: %s\n", cursor); } 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; } first_line = false; } finish: pager_close(); strv_free(arg_file); return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }