summaryrefslogtreecommitdiffstats
path: root/src/coredump/coredumpctl.c
blob: fbee242962feb699c8360cf09edde25c16e2030e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
/* SPDX-License-Identifier: LGPL-2.1+ */

#include <fcntl.h>
#include <getopt.h>
#include <locale.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include "sd-bus.h"
#include "sd-journal.h"
#include "sd-messages.h"

#include "alloc-util.h"
#include "bus-error.h"
#include "bus-util.h"
#include "compress.h"
#include "def.h"
#include "fd-util.h"
#include "fs-util.h"
#include "journal-internal.h"
#include "journal-util.h"
#include "log.h"
#include "macro.h"
#include "main-func.h"
#include "pager.h"
#include "parse-util.h"
#include "path-util.h"
#include "pretty-print.h"
#include "process-util.h"
#include "rlimit-util.h"
#include "sigbus.h"
#include "signal-util.h"
#include "string-util.h"
#include "strv.h"
#include "terminal-util.h"
#include "tmpfile-util.h"
#include "user-util.h"
#include "util.h"
#include "verbs.h"

#define SHORT_BUS_CALL_TIMEOUT_USEC (3 * USEC_PER_SEC)

static usec_t arg_since = USEC_INFINITY, arg_until = USEC_INFINITY;
static const char* arg_field = NULL;
static const char *arg_debugger = NULL;
static const char *arg_directory = NULL;
static PagerFlags arg_pager_flags = 0;
static int arg_no_legend = false;
static int arg_one = false;
static const char* arg_output = NULL;
static bool arg_reverse = false;
static bool arg_quiet = false;

static int add_match(sd_journal *j, const char *match) {
        _cleanup_free_ char *p = NULL;
        const char* prefix, *pattern;
        pid_t pid;
        int r;

        if (strchr(match, '='))
                prefix = "";
        else if (strchr(match, '/')) {
                r = path_make_absolute_cwd(match, &p);
                if (r < 0)
                        return log_error_errno(r, "path_make_absolute_cwd(\"%s\"): %m", match);

                match = p;
                prefix = "COREDUMP_EXE=";
        } else if (parse_pid(match, &pid) >= 0)
                prefix = "COREDUMP_PID=";
        else
                prefix = "COREDUMP_COMM=";

        pattern = strjoina(prefix, match);
        log_debug("Adding match: %s", pattern);
        r = sd_journal_add_match(j, pattern, 0);
        if (r < 0)
                return log_error_errno(r, "Failed to add match \"%s\": %m", match);

        return 0;
}

static int add_matches(sd_journal *j, char **matches) {
        char **match;
        int r;

        r = sd_journal_add_match(j, "MESSAGE_ID=" SD_MESSAGE_COREDUMP_STR, 0);
        if (r < 0)
                return log_error_errno(r, "Failed to add match \"%s\": %m", "MESSAGE_ID=" SD_MESSAGE_COREDUMP_STR);

        r = sd_journal_add_match(j, "MESSAGE_ID=" SD_MESSAGE_BACKTRACE_STR, 0);
        if (r < 0)
                return log_error_errno(r, "Failed to add match \"%s\": %m", "MESSAGE_ID=" SD_MESSAGE_BACKTRACE_STR);

        STRV_FOREACH(match, matches) {
                r = add_match(j, *match);
                if (r < 0)
                        return r;
        }

        return 0;
}

static int acquire_journal(sd_journal **ret, char **matches) {
        _cleanup_(sd_journal_closep) sd_journal *j = NULL;
        int r;

        assert(ret);

        if (arg_directory) {
                r = sd_journal_open_directory(&j, arg_directory, 0);
                if (r < 0)
                        return log_error_errno(r, "Failed to open journals in directory: %s: %m", arg_directory);
        } else {
                r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY);
                if (r < 0)
                        return log_error_errno(r, "Failed to open journal: %m");
        }

        r = journal_access_check_and_warn(j, arg_quiet, true);
        if (r < 0)
                return r;

        r = add_matches(j, matches);
        if (r < 0)
                return r;

        if (DEBUG_LOGGING) {
                _cleanup_free_ char *filter;

                filter = journal_make_match_string(j);
                log_debug("Journal filter: %s", filter);
        }

        *ret = TAKE_PTR(j);

        return 0;
}

static int help(void) {
        _cleanup_free_ char *link = NULL;
        int r;

        r = terminal_urlify_man("coredumpctl", "1", &link);
        if (r < 0)
                return log_oom();

        printf("%s [OPTIONS...]\n\n"
               "List or retrieve coredumps from the journal.\n\n"
               "Flags:\n"
               "  -h --help              Show this help\n"
               "     --version           Print version string\n"
               "     --no-pager          Do not pipe output into a pager\n"
               "     --no-legend         Do not print the column headers\n"
               "     --debugger=DEBUGGER Use the given debugger\n"
               "  -1                     Show information about most recent entry only\n"
               "  -S --since=DATE        Only print coredumps since the date\n"
               "  -U --until=DATE        Only print coredumps until the date\n"
               "  -r --reverse           Show the newest entries first\n"
               "  -F --field=FIELD       List all values a certain field takes\n"
               "  -o --output=FILE       Write output to FILE\n"
               "  -D --directory=DIR     Use journal files from directory\n\n"
               "  -q --quiet             Do not show info messages and privilege warning\n"
               "Commands:\n"
               "  list [MATCHES...]  List available coredumps (default)\n"
               "  info [MATCHES...]  Show detailed information about one or more coredumps\n"
               "  dump [MATCHES...]  Print first matching coredump to stdout\n"
               "  debug [MATCHES...] Start a debugger for the first matching coredump\n"
               "\nSee the %s for details.\n"
               , program_invocation_short_name
               , link
        );

        return 0;
}

static int parse_argv(int argc, char *argv[]) {
        enum {
                ARG_VERSION = 0x100,
                ARG_NO_PAGER,
                ARG_NO_LEGEND,
                ARG_DEBUGGER,
        };

        int c, r;

        static const struct option options[] = {
                { "help",         no_argument,       NULL, 'h'           },
                { "version" ,     no_argument,       NULL, ARG_VERSION   },
                { "no-pager",     no_argument,       NULL, ARG_NO_PAGER  },
                { "no-legend",    no_argument,       NULL, ARG_NO_LEGEND },
                { "debugger",     required_argument, NULL, ARG_DEBUGGER  },
                { "output",       required_argument, NULL, 'o'           },
                { "field",        required_argument, NULL, 'F'           },
                { "directory",    required_argument, NULL, 'D'           },
                { "reverse",      no_argument,       NULL, 'r'           },
                { "since",        required_argument, NULL, 'S'           },
                { "until",        required_argument, NULL, 'U'           },
                { "quiet",        no_argument,       NULL, 'q'           },
                {}
        };

        assert(argc >= 0);
        assert(argv);

        while ((c = getopt_long(argc, argv, "ho:F:1D:rS:U:q", options, NULL)) >= 0)
                switch(c) {
                case 'h':
                        return help();

                case ARG_VERSION:
                        return version();

                case ARG_NO_PAGER:
                        arg_pager_flags |= PAGER_DISABLE;
                        break;

                case ARG_NO_LEGEND:
                        arg_no_legend = true;
                        break;

                case ARG_DEBUGGER:
                        arg_debugger = optarg;
                        break;

                case 'o':
                        if (arg_output)
                                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                                       "Cannot set output more than once.");

                        arg_output = optarg;
                        break;

                case 'S':
                        r = parse_timestamp(optarg, &arg_since);
                        if (r < 0)
                                return log_error_errno(r, "Failed to parse timestamp '%s': %m", optarg);
                        break;

                case 'U':
                        r = parse_timestamp(optarg, &arg_until);
                        if (r < 0)
                                return log_error_errno(r, "Failed to parse timestamp '%s': %m", optarg);
                        break;

                case 'F':
                        if (arg_field)
                                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                                       "Cannot use --field/-F more than once.");
                        arg_field = optarg;
                        break;

                case '1':
                        arg_one = true;
                        break;

                case 'D':
                        arg_directory = optarg;
                        break;

                case 'r':
                        arg_reverse = true;
                        break;

                case 'q':
                        arg_quiet = true;
                        break;

                case '?':
                        return -EINVAL;

                default:
                        assert_not_reached("Unhandled option");
                }

        if (arg_since != USEC_INFINITY && arg_until != USEC_INFINITY &&
            arg_since > arg_until)
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "--since= must be before --until=.");

        return 1;
}

static int retrieve(const void *data,
                    size_t len,
                    const char *name,
                    char **var) {

        size_t ident;
        char *v;

        ident = strlen(name) + 1; /* name + "=" */

        if (len < ident)
                return 0;

        if (memcmp(data, name, ident - 1) != 0)
                return 0;

        if (((const char*) data)[ident - 1] != '=')
                return 0;

        v = strndup((const char*)data + ident, len - ident);
        if (!v)
                return log_oom();

        free(*var);
        *var = v;

        return 1;
}

static int print_field(FILE* file, sd_journal *j) {
        const void *d;
        size_t l;

        assert(file);
        assert(j);

        assert(arg_field);

        /* A (user-specified) field may appear more than once for a given entry.
         * We will print all of the occurences.
         * This is different below for fields that systemd-coredump uses,
         * because they cannot meaningfully appear more than once.
         */
        SD_JOURNAL_FOREACH_DATA(j, d, l) {
                _cleanup_free_ char *value = NULL;
                int r;

                r = retrieve(d, l, arg_field, &value);
                if (r < 0)
                        return r;
                if (r > 0)
                        fprintf(file, "%s\n", value);
        }

        return 0;
}

#define RETRIEVE(d, l, name, arg)                    \
        {                                            \
                int _r = retrieve(d, l, name, &arg); \
                if (_r < 0)                          \
                        return _r;                   \
                if (_r > 0)                          \
                        continue;                    \
        }

static int print_list(FILE* file, sd_journal *j, int had_legend) {
        _cleanup_free_ char
                *mid = NULL, *pid = NULL, *uid = NULL, *gid = NULL,
                *sgnl = NULL, *exe = NULL, *comm = NULL, *cmdline = NULL,
                *filename = NULL, *truncated = NULL, *coredump = NULL;
        const void *d;
        size_t l;
        usec_t t;
        char buf[FORMAT_TIMESTAMP_MAX];
        int r;
        const char *present;
        bool normal_coredump;

        assert(file);
        assert(j);

        SD_JOURNAL_FOREACH_DATA(j, d, l) {
                RETRIEVE(d, l, "MESSAGE_ID", mid);
                RETRIEVE(d, l, "COREDUMP_PID", pid);
                RETRIEVE(d, l, "COREDUMP_UID", uid);
                RETRIEVE(d, l, "COREDUMP_GID", gid);
                RETRIEVE(d, l, "COREDUMP_SIGNAL", sgnl);
                RETRIEVE(d, l, "COREDUMP_EXE", exe);
                RETRIEVE(d, l, "COREDUMP_COMM", comm);
                RETRIEVE(d, l, "COREDUMP_CMDLINE", cmdline);
                RETRIEVE(d, l, "COREDUMP_FILENAME", filename);
                RETRIEVE(d, l, "COREDUMP_TRUNCATED", truncated);
                RETRIEVE(d, l, "COREDUMP", coredump);
        }

        if (!pid && !uid && !gid && !sgnl && !exe && !comm && !cmdline && !filename) {
                log_warning("Empty coredump log entry");
                return -EINVAL;
        }

        r = sd_journal_get_realtime_usec(j, &t);
        if (r < 0)
                return log_error_errno(r, "Failed to get realtime timestamp: %m");

        format_timestamp(buf, sizeof(buf), t);

        if (!had_legend && !arg_no_legend)
                fprintf(file, "%-*s %*s %*s %*s %*s %-*s %s\n",
                        FORMAT_TIMESTAMP_WIDTH, "TIME",
                        6, "PID",
                        5, "UID",
                        5, "GID",
                        3, "SIG",
                        9, "COREFILE",
                           "EXE");

        normal_coredump = streq_ptr(mid, SD_MESSAGE_COREDUMP_STR);

        if (filename)
                if (access(filename, R_OK) == 0)
                        present = "present";
                else if (errno == ENOENT)
                        present = "missing";
                else
                        present = "error";
        else if (coredump)
                present = "journal";
        else if (normal_coredump)
                present = "none";
        else
                present = "-";

        if (STR_IN_SET(present, "present", "journal") && truncated && parse_boolean(truncated) > 0)
                present = "truncated";

        fprintf(file, "%-*s %*s %*s %*s %*s %-*s %s\n",
                FORMAT_TIMESTAMP_WIDTH, buf,
                6, strna(pid),
                5, strna(uid),
                5, strna(gid),
                3, normal_coredump ? strna(sgnl) : "-",
                9, present,
                strna(exe ?: (comm ?: cmdline)));

        return 0;
}

static int print_info(FILE *file, sd_journal *j, bool need_space) {
        _cleanup_free_ char
                *mid = NULL, *pid = NULL, *uid = NULL, *gid = NULL,
                *sgnl = NULL, *exe = NULL, *comm = NULL, *cmdline = NULL,
                *unit = NULL, *user_unit = NULL, *session = NULL,
                *boot_id = NULL, *machine_id = NULL, *hostname = NULL,
                *slice = NULL, *cgroup = NULL, *owner_uid = NULL,
                *message = NULL, *timestamp = NULL, *filename = NULL,
                *truncated = NULL, *coredump = NULL;
        const void *d;
        size_t l;
        bool normal_coredump;
        int r;

        assert(file);
        assert(j);

        SD_JOURNAL_FOREACH_DATA(j, d, l) {
                RETRIEVE(d, l, "MESSAGE_ID", mid);
                RETRIEVE(d, l, "COREDUMP_PID", pid);
                RETRIEVE(d, l, "COREDUMP_UID", uid);
                RETRIEVE(d, l, "COREDUMP_GID", gid);
                RETRIEVE(d, l, "COREDUMP_SIGNAL", sgnl);
                RETRIEVE(d, l, "COREDUMP_EXE", exe);
                RETRIEVE(d, l, "COREDUMP_COMM", comm);
                RETRIEVE(d, l, "COREDUMP_CMDLINE", cmdline);
                RETRIEVE(d, l, "COREDUMP_UNIT", unit);
                RETRIEVE(d, l, "COREDUMP_USER_UNIT", user_unit);
                RETRIEVE(d, l, "COREDUMP_SESSION", session);
                RETRIEVE(d, l, "COREDUMP_OWNER_UID", owner_uid);
                RETRIEVE(d, l, "COREDUMP_SLICE", slice);
                RETRIEVE(d, l, "COREDUMP_CGROUP", cgroup);
                RETRIEVE(d, l, "COREDUMP_TIMESTAMP", timestamp);
                RETRIEVE(d, l, "COREDUMP_FILENAME", filename);
                RETRIEVE(d, l, "COREDUMP_TRUNCATED", truncated);
                RETRIEVE(d, l, "COREDUMP", coredump);
                RETRIEVE(d, l, "_BOOT_ID", boot_id);
                RETRIEVE(d, l, "_MACHINE_ID", machine_id);
                RETRIEVE(d, l, "_HOSTNAME", hostname);
                RETRIEVE(d, l, "MESSAGE", message);
        }

        if (need_space)
                fputs("\n", file);

        normal_coredump = streq_ptr(mid, SD_MESSAGE_COREDUMP_STR);

        if (comm)
                fprintf(file,
                        "           PID: %s%s%s (%s)\n",
                        ansi_highlight(), strna(pid), ansi_normal(), comm);
        else
                fprintf(file,
                        "           PID: %s%s%s\n",
                        ansi_highlight(), strna(pid), ansi_normal());

        if (uid) {
                uid_t n;

                if (parse_uid(uid, &n) >= 0) {
                        _cleanup_free_ char *u = NULL;

                        u = uid_to_name(n);
                        fprintf(file,
                                "           UID: %s (%s)\n",
                                uid, u);
                } else {
                        fprintf(file,
                                "           UID: %s\n",
                                uid);
                }
        }

        if (gid) {
                gid_t n;

                if (parse_gid(gid, &n) >= 0) {
                        _cleanup_free_ char *g = NULL;

                        g = gid_to_name(n);
                        fprintf(file,
                                "           GID: %s (%s)\n",
                                gid, g);
                } else {
                        fprintf(file,
                                "           GID: %s\n",
                                gid);
                }
        }

        if (sgnl) {
                int sig;
                const char *name = normal_coredump ? "Signal" : "Reason";

                if (normal_coredump && safe_atoi(sgnl, &sig) >= 0)
                        fprintf(file, "        %s: %s (%s)\n", name, sgnl, signal_to_string(sig));
                else
                        fprintf(file, "        %s: %s\n", name, sgnl);
        }

        if (timestamp) {
                usec_t u;

                r = safe_atou64(timestamp, &u);
                if (r >= 0) {
                        char absolute[FORMAT_TIMESTAMP_MAX], relative[FORMAT_TIMESPAN_MAX];

                        fprintf(file,
                                "     Timestamp: %s (%s)\n",
                                format_timestamp(absolute, sizeof(absolute), u),
                                format_timestamp_relative(relative, sizeof(relative), u));

                } else
                        fprintf(file, "     Timestamp: %s\n", timestamp);
        }

        if (cmdline)
                fprintf(file, "  Command Line: %s\n", cmdline);
        if (exe)
                fprintf(file, "    Executable: %s%s%s\n", ansi_highlight(), exe, ansi_normal());
        if (cgroup)
                fprintf(file, " Control Group: %s\n", cgroup);
        if (unit)
                fprintf(file, "          Unit: %s\n", unit);
        if (user_unit)
                fprintf(file, "     User Unit: %s\n", user_unit);
        if (slice)
                fprintf(file, "         Slice: %s\n", slice);
        if (session)
                fprintf(file, "       Session: %s\n", session);
        if (owner_uid) {
                uid_t n;

                if (parse_uid(owner_uid, &n) >= 0) {
                        _cleanup_free_ char *u = NULL;

                        u = uid_to_name(n);
                        fprintf(file,
                                "     Owner UID: %s (%s)\n",
                                owner_uid, u);
                } else {
                        fprintf(file,
                                "     Owner UID: %s\n",
                                owner_uid);
                }
        }
        if (boot_id)
                fprintf(file, "       Boot ID: %s\n", boot_id);
        if (machine_id)
                fprintf(file, "    Machine ID: %s\n", machine_id);
        if (hostname)
                fprintf(file, "      Hostname: %s\n", hostname);

        if (filename) {
                bool inacc, trunc;

                inacc = access(filename, R_OK) < 0;
                trunc = truncated && parse_boolean(truncated) > 0;

                if (inacc || trunc)
                        fprintf(file, "       Storage: %s%s (%s%s%s)%s\n",
                                ansi_highlight_red(),
                                filename,
                                inacc ? "inaccessible" : "",
                                inacc && trunc ? ", " : "",
                                trunc ? "truncated" : "",
                                ansi_normal());
                else
                        fprintf(file, "       Storage: %s\n", filename);
        }

        else if (coredump)
                fprintf(file, "       Storage: journal\n");
        else
                fprintf(file, "       Storage: none\n");

        if (message) {
                _cleanup_free_ char *m = NULL;

                m = strreplace(message, "\n", "\n                ");

                fprintf(file, "       Message: %s\n", strstrip(m ?: message));
        }

        return 0;
}

static int focus(sd_journal *j) {
        int r;

        r = sd_journal_seek_tail(j);
        if (r == 0)
                r = sd_journal_previous(j);
        if (r < 0)
                return log_error_errno(r, "Failed to search journal: %m");
        if (r == 0)
                return log_error_errno(SYNTHETIC_ERRNO(ESRCH),
                                       "No match found.");
        return r;
}

static int print_entry(sd_journal *j, unsigned n_found, bool verb_is_info) {
        assert(j);

        if (verb_is_info)
                return print_info(stdout, j, n_found);
        else if (arg_field)
                return print_field(stdout, j);
        else
                return print_list(stdout, j, n_found);
}

static int dump_list(int argc, char **argv, void *userdata) {
        _cleanup_(sd_journal_closep) sd_journal *j = NULL;
        unsigned n_found = 0;
        bool verb_is_info;
        int r;

        verb_is_info = (argc >= 1 && streq(argv[0], "info"));

        r = acquire_journal(&j, argv + 1);
        if (r < 0)
                return r;

        (void) pager_open(arg_pager_flags);

        /* The coredumps are likely to compressed, and for just
         * listing them we don't need to decompress them, so let's
         * pick a fairly low data threshold here */
        sd_journal_set_data_threshold(j, 4096);

        /* "info" without pattern implies "-1" */
        if (arg_one || (verb_is_info && argc == 1)) {
                r = focus(j);
                if (r < 0)
                        return r;

                return print_entry(j, 0, verb_is_info);
        } else {
                if (arg_since != USEC_INFINITY && !arg_reverse)
                        r = sd_journal_seek_realtime_usec(j, arg_since);
                else if (arg_until != USEC_INFINITY && arg_reverse)
                        r = sd_journal_seek_realtime_usec(j, arg_until);
                else if (arg_reverse)
                        r = sd_journal_seek_tail(j);
                else
                        r = sd_journal_seek_head(j);
                if (r < 0)
                        return log_error_errno(r, "Failed to seek to date: %m");

                for (;;) {
                        if (!arg_reverse)
                                r = sd_journal_next(j);
                        else
                                r = sd_journal_previous(j);

                        if (r < 0)
                                return log_error_errno(r, "Failed to iterate through journal: %m");

                        if (r == 0)
                                break;

                        if (arg_until != USEC_INFINITY && !arg_reverse) {
                                usec_t usec;

                                r = sd_journal_get_realtime_usec(j, &usec);
                                if (r < 0)
                                        return log_error_errno(r, "Failed to determine timestamp: %m");
                                if (usec > arg_until)
                                        continue;
                        }

                        if (arg_since != USEC_INFINITY && arg_reverse) {
                                usec_t usec;

                                r = sd_journal_get_realtime_usec(j, &usec);
                                if (r < 0)
                                        return log_error_errno(r, "Failed to determine timestamp: %m");
                                if (usec < arg_since)
                                        continue;
                        }

                        r = print_entry(j, n_found++, verb_is_info);
                        if (r < 0)
                                return r;
                }

                if (!arg_field && n_found <= 0) {
                        if (!arg_quiet)
                                log_notice("No coredumps found.");
                        return -ESRCH;
                }
        }

        return 0;
}

static int save_core(sd_journal *j, FILE *file, char **path, bool *unlink_temp) {
        const char *data;
        _cleanup_free_ char *filename = NULL;
        size_t len;
        int r, fd;
        _cleanup_close_ int fdt = -1;
        char *temp = NULL;

        assert(!(file && path));         /* At most one can be specified */
        assert(!!path == !!unlink_temp); /* Those must be specified together */

        /* Look for a coredump on disk first. */
        r = sd_journal_get_data(j, "COREDUMP_FILENAME", (const void**) &data, &len);
        if (r == 0)
                retrieve(data, len, "COREDUMP_FILENAME", &filename);
        else {
                if (r != -ENOENT)
                        return log_error_errno(r, "Failed to retrieve COREDUMP_FILENAME field: %m");
                /* Check that we can have a COREDUMP field. We still haven't set a high
                 * data threshold, so we'll get a few kilobytes at most.
                 */

                r = sd_journal_get_data(j, "COREDUMP", (const void**) &data, &len);
                if (r == -ENOENT)
                        return log_error_errno(r, "Coredump entry has no core attached (neither internally in the journal nor externally on disk).");
                if (r < 0)
                        return log_error_errno(r, "Failed to retrieve COREDUMP field: %m");
        }

        if (filename) {
                if (access(filename, R_OK) < 0)
                        return log_error_errno(errno, "File \"%s\" is not readable: %m", filename);

                if (path && !endswith(filename, ".xz") && !endswith(filename, ".lz4")) {
                        *path = TAKE_PTR(filename);

                        return 0;
                }
        }

        if (path) {
                const char *vt;

                /* Create a temporary file to write the uncompressed core to. */

                r = var_tmp_dir(&vt);
                if (r < 0)
                        return log_error_errno(r, "Failed to acquire temporary directory path: %m");

                temp = strjoin(vt, "/coredump-XXXXXX");
                if (!temp)
                        return log_oom();

                fdt = mkostemp_safe(temp);
                if (fdt < 0)
                        return log_error_errno(fdt, "Failed to create temporary file: %m");
                log_debug("Created temporary file %s", temp);

                fd = fdt;
        } else {
                /* If neither path or file are specified, we will write to stdout. Let's now check
                 * if stdout is connected to a tty. We checked that the file exists, or that the
                 * core might be stored in the journal. In this second case, if we found the entry,
                 * in all likelyhood we will be able to access the COREDUMP= field.  In either case,
                 * we stop before doing any "real" work, i.e. before starting decompression or
                 * reading from the file or creating temporary files.
                 */
                if (!file) {
                        if (on_tty())
                                return log_error_errno(SYNTHETIC_ERRNO(ENOTTY),
                                                       "Refusing to dump core to tty"
                                                       " (use shell redirection or specify --output).");
                        file = stdout;
                }

                fd = fileno(file);
        }

        if (filename) {
#if HAVE_XZ || HAVE_LZ4
                _cleanup_close_ int fdf;

                fdf = open(filename, O_RDONLY | O_CLOEXEC);
                if (fdf < 0) {
                        r = log_error_errno(errno, "Failed to open %s: %m", filename);
                        goto error;
                }

                r = decompress_stream(filename, fdf, fd, -1);
                if (r < 0) {
                        log_error_errno(r, "Failed to decompress %s: %m", filename);
                        goto error;
                }
#else
                log_error("Cannot decompress file. Compiled without compression support.");
                r = -EOPNOTSUPP;
                goto error;
#endif
        } else {
                ssize_t sz;

                /* We want full data, nothing truncated. */
                sd_journal_set_data_threshold(j, 0);

                r = sd_journal_get_data(j, "COREDUMP", (const void**) &data, &len);
                if (r < 0)
                        return log_error_errno(r, "Failed to retrieve COREDUMP field: %m");

                assert(len >= 9);
                data += 9;
                len -= 9;

                sz = write(fd, data, len);
                if (sz < 0) {
                        r = log_error_errno(errno, "Failed to write output: %m");
                        goto error;
                }
                if (sz != (ssize_t) len) {
                        log_error("Short write to output.");
                        r = -EIO;
                        goto error;
                }
        }

        if (temp) {
                *path = temp;
                *unlink_temp = true;
        }
        return 0;

error:
        if (temp) {
                unlink(temp);
                log_debug("Removed temporary file %s", temp);
        }
        return r;
}

static int dump_core(int argc, char **argv, void *userdata) {
        _cleanup_(sd_journal_closep) sd_journal *j = NULL;
        _cleanup_fclose_ FILE *f = NULL;
        int r;

        if (arg_field) {
                log_error("Option --field/-F only makes sense with list");
                return -EINVAL;
        }

        r = acquire_journal(&j, argv + 1);
        if (r < 0)
                return r;

        r = focus(j);
        if (r < 0)
                return r;

        if (arg_output) {
                f = fopen(arg_output, "we");
                if (!f)
                        return log_error_errno(errno, "Failed to open \"%s\" for writing: %m", arg_output);
        }

        print_info(f ? stdout : stderr, j, false);

        r = save_core(j, f, NULL, NULL);
        if (r < 0)
                return r;

        r = sd_journal_previous(j);
        if (r > 0 && !arg_quiet)
                log_notice("More than one entry matches, ignoring rest.");

        return 0;
}

static int run_debug(int argc, char **argv, void *userdata) {
        _cleanup_(sd_journal_closep) sd_journal *j = NULL;
        _cleanup_free_ char *exe = NULL, *path = NULL;
        bool unlink_path = false;
        const char *data, *fork_name;
        size_t len;
        pid_t pid;
        int r;

        if (!arg_debugger) {
                char *env_debugger;

                env_debugger = getenv("SYSTEMD_DEBUGGER");
                if (env_debugger)
                        arg_debugger = env_debugger;
                else
                        arg_debugger = "gdb";
        }

        if (arg_field) {
                log_error("Option --field/-F only makes sense with list");
                return -EINVAL;
        }

        r = acquire_journal(&j, argv + 1);
        if (r < 0)
                return r;

        r = focus(j);
        if (r < 0)
                return r;

        print_info(stdout, j, false);
        fputs("\n", stdout);

        r = sd_journal_get_data(j, "COREDUMP_EXE", (const void**) &data, &len);
        if (r < 0)
                return log_error_errno(r, "Failed to retrieve COREDUMP_EXE field: %m");

        assert(len > STRLEN("COREDUMP_EXE="));
        data += STRLEN("COREDUMP_EXE=");
        len -= STRLEN("COREDUMP_EXE=");

        exe = strndup(data, len);
        if (!exe)
                return log_oom();

        if (endswith(exe, " (deleted)")) {
                log_error("Binary already deleted.");
                return -ENOENT;
        }

        if (!path_is_absolute(exe)) {
                log_error("Binary is not an absolute path.");
                return -ENOENT;
        }

        r = save_core(j, NULL, &path, &unlink_path);
        if (r < 0)
                return r;

        /* Don't interfere with gdb and its handling of SIGINT. */
        (void) ignore_signals(SIGINT, -1);

        fork_name = strjoina("(", arg_debugger, ")");

        r = safe_fork(fork_name, FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_CLOSE_ALL_FDS|FORK_RLIMIT_NOFILE_SAFE|FORK_LOG, &pid);
        if (r < 0)
                goto finish;
        if (r == 0) {
                execlp(arg_debugger, arg_debugger, exe, "-c", path, NULL);
                log_open();
                log_error_errno(errno, "Failed to invoke %s: %m", arg_debugger);
                _exit(EXIT_FAILURE);
        }

        r = wait_for_terminate_and_check(arg_debugger, pid, WAIT_LOG_ABNORMAL);

finish:
        (void) default_signals(SIGINT, -1);

        if (unlink_path) {
                log_debug("Removed temporary file %s", path);
                unlink(path);
        }

        return r;
}

static int check_units_active(void) {
        _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
        _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
        _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
        int c = 0, r;
        const char *id, *state, *substate;

        if (arg_quiet)
                return false;

        r = sd_bus_default_system(&bus);
        if (r < 0)
                return log_error_errno(r, "Failed to acquire bus: %m");

        r = sd_bus_message_new_method_call(
                        bus,
                        &m,
                        "org.freedesktop.systemd1",
                        "/org/freedesktop/systemd1",
                        "org.freedesktop.systemd1.Manager",
                        "ListUnitsByPatterns");
        if (r < 0)
                return bus_log_create_error(r);

        r = sd_bus_message_append_strv(m, NULL);
        if (r < 0)
                return bus_log_create_error(r);

        r = sd_bus_message_append_strv(m, STRV_MAKE("systemd-coredump@*.service"));
        if (r < 0)
                return bus_log_create_error(r);

        r = sd_bus_call(bus, m, SHORT_BUS_CALL_TIMEOUT_USEC, &error, &reply);
        if (r < 0)
                return log_error_errno(r, "Failed to check if any systemd-coredump@.service units are running: %s",
                                       bus_error_message(&error, r));

        r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssssssouso)");
        if (r < 0)
                return bus_log_parse_error(r);

        while ((r = sd_bus_message_read(
                                reply, "(ssssssouso)",
                                &id,  NULL,  NULL,  &state,  &substate,
                                NULL,  NULL,  NULL,  NULL,  NULL)) > 0) {
                bool found = !STR_IN_SET(state, "inactive", "dead", "failed");
                log_debug("Unit %s is %s/%s, %scounting it.", id, state, substate, found ? "" : "not ");
                c += found;
        }
        if (r < 0)
                return bus_log_parse_error(r);

        r = sd_bus_message_exit_container(reply);
        if (r < 0)
                return bus_log_parse_error(r);

        return c;
}

static int coredumpctl_main(int argc, char *argv[]) {

        static const Verb verbs[] = {
                { "list",  VERB_ANY, VERB_ANY, VERB_DEFAULT, dump_list },
                { "info",  VERB_ANY, VERB_ANY, 0,            dump_list },
                { "dump",  VERB_ANY, VERB_ANY, 0,            dump_core },
                { "debug", VERB_ANY, VERB_ANY, 0,            run_debug },
                { "gdb",   VERB_ANY, VERB_ANY, 0,            run_debug },
                {}
        };

        return dispatch_verb(argc, argv, verbs, NULL);
}

static int run(int argc, char *argv[]) {
        int r, units_active;

        setlocale(LC_ALL, "");
        log_parse_environment();
        log_open();

        /* The journal merging logic potentially needs a lot of fds. */
        (void) rlimit_nofile_bump(HIGH_RLIMIT_NOFILE);

        r = parse_argv(argc, argv);
        if (r <= 0)
                return r;

        sigbus_install();

        units_active = check_units_active(); /* error is treated the same as 0 */

        r = coredumpctl_main(argc, argv);

        if (units_active > 0)
                printf("%s-- Notice: %d systemd-coredump@.service %s, output may be incomplete.%s\n",
                       ansi_highlight_red(),
                       units_active, units_active == 1 ? "unit is running" : "units are running",
                       ansi_normal());
        return r;
}

DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run);