summaryrefslogtreecommitdiff
path: root/src/util/common_logging.c
blob: cba37cd2f26474a578ea27b2a6945d00edfd1688 (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
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
/*
     This file is part of GNUnet.
     Copyright (C) 2006-2013 GNUnet e.V.

     GNUnet is free software: you can redistribute it and/or modify it
     under the terms of the GNU Affero General Public License as published
     by the Free Software Foundation, either version 3 of the License,
     or (at your option) any later version.

     GNUnet 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
     Affero General Public License for more details.

     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.

     SPDX-License-Identifier: AGPL3.0-or-later
 */

/**
 * @file util/common_logging.c
 * @brief error handling API
 * @author Christian Grothoff
 */
#include "platform.h"
#include "gnunet_crypto_lib.h"
#include "gnunet_disk_lib.h"
#include "gnunet_strings_lib.h"
#include <regex.h>


/**
 * After how many milliseconds do we always print
 * that "message X was repeated N times"?  Use 12h.
 */
#define BULK_DELAY_THRESHOLD (12 * 60 * 60 * 1000LL * 1000LL)

/**
 * After how many repetitions do we always print
 * that "message X was repeated N times"? (even if
 * we have not yet reached the delay threshold)
 */
#define BULK_REPEAT_THRESHOLD 1000

/**
 * How many characters do we use for matching of
 * bulk messages?
 */
#define BULK_TRACK_SIZE 256

/**
 * How many characters do we use for matching of
 * bulk components?
 */
#define COMP_TRACK_SIZE 32

/**
 * How many characters can a date/time string
 * be at most?
 */
#define DATE_STR_SIZE 64

/**
 * How many log files to keep?
 */
#define ROTATION_KEEP 3

#ifndef PATH_MAX
/**
 * Assumed maximum path length (for the log file name).
 */
#define PATH_MAX 4096
#endif


/**
 * Linked list of active loggers.
 */
struct CustomLogger
{
  /**
   * This is a linked list.
   */
  struct CustomLogger *next;

  /**
   * Log function.
   */
  GNUNET_Logger logger;

  /**
   * Closure for logger.
   */
  void *logger_cls;
};


/**
 * Asynchronous scope of the current thread, or NULL if we have not
 * entered an async scope yet.
 */
static GNUNET_THREAD_LOCAL struct GNUNET_AsyncScopeSave current_async_scope;

/**
 * The last "bulk" error message that we have been logging.
 * Note that this message maybe truncated to the first BULK_TRACK_SIZE
 * characters, in which case it is NOT 0-terminated!
 */
static GNUNET_THREAD_LOCAL char last_bulk[BULK_TRACK_SIZE] __nonstring;

/**
 * Type of the last bulk message.
 */
static GNUNET_THREAD_LOCAL enum GNUNET_ErrorType last_bulk_kind;

/**
 * Time of the last bulk error message (0 for none)
 */
static GNUNET_THREAD_LOCAL struct GNUNET_TIME_Absolute last_bulk_time;

/**
 * Number of times that bulk message has been repeated since.
 */
static GNUNET_THREAD_LOCAL unsigned int last_bulk_repeat;

/**
 * Component when the last bulk was logged.  Will be 0-terminated.
 */
static GNUNET_THREAD_LOCAL char last_bulk_comp[COMP_TRACK_SIZE + 1];

/**
 * Running component.
 */
static char *component;

/**
 * Running component (without pid).
 */
static char *component_nopid;

/**
 * Format string describing the name of the log file.
 */
static char *log_file_name;

/**
 * Minimum log level.
 */
static enum GNUNET_ErrorType min_level;

/**
 * Linked list of our custom loggres.
 */
static struct CustomLogger *loggers;

/**
 * Number of log calls to ignore.
 */
static GNUNET_THREAD_LOCAL int skip_log = 0;

/**
 * File descriptor to use for "stderr", or NULL for none.
 */
static FILE *GNUNET_stderr;

/**
 * Represents a single logging definition
 */
struct LogDef
{
  /**
   * Component name regex
   */
  regex_t component_regex;

  /**
   * File name regex
   */
  regex_t file_regex;

  /**
   * Function name regex
   */
  regex_t function_regex;

  /**
   * Lowest line at which this definition matches.
   * Defaults to 0. Must be <= to_line.
   */
  int from_line;

  /**
   * Highest line at which this definition matches.
   * Defaults to INT_MAX. Must be >= from_line.
   */
  int to_line;

  /**
   * Maximal log level allowed for calls that match this definition.
   * Calls with higher log level will be disabled.
   * Must be >= 0
   */
  int level;

  /**
   * 1 if this definition comes from GNUNET_FORCE_LOG, which means that it
   * overrides any configuration options. 0 otherwise.
   */
  int force;
};


#if ! defined(GNUNET_CULL_LOGGING)
/**
 * Dynamic array of logging definitions
 */
static struct LogDef *logdefs;

/**
 * Allocated size of logdefs array (in units)
 */
static int logdefs_size;

/**
 * The number of units used in logdefs array.
 */
static int logdefs_len;

/**
 * #GNUNET_YES if GNUNET_LOG environment variable is already parsed.
 */
static int gnunet_log_parsed;

/**
 * #GNUNET_YES if GNUNET_FORCE_LOG environment variable is already parsed.
 */
static int gnunet_force_log_parsed;

/**
 * #GNUNET_YES if at least one definition with forced == 1 is available.
 */
static int gnunet_force_log_present;
#endif


/**
 * Convert a textual description of a loglevel
 * to the respective enumeration type.
 *
 * @param log loglevel to parse
 * @return GNUNET_ERROR_TYPE_INVALID if log does not parse
 */
static enum GNUNET_ErrorType
get_type (const char *log)
{
  if (NULL == log)
    return GNUNET_ERROR_TYPE_UNSPECIFIED;
  if (0 == strcasecmp (log, "DEBUG"))
    return GNUNET_ERROR_TYPE_DEBUG;
  if (0 == strcasecmp (log, "INFO"))
    return GNUNET_ERROR_TYPE_INFO;
  if (0 == strcasecmp (log, "MESSAGE"))
    return GNUNET_ERROR_TYPE_MESSAGE;
  if (0 == strcasecmp (log, "WARNING"))
    return GNUNET_ERROR_TYPE_WARNING;
  if (0 == strcasecmp (log, "ERROR"))
    return GNUNET_ERROR_TYPE_ERROR;
  if (0 == strcasecmp (log, "NONE"))
    return GNUNET_ERROR_TYPE_NONE;
  return GNUNET_ERROR_TYPE_INVALID;
}


/**
 * Abort the process, generate a core dump if possible.
 */
void
GNUNET_abort_ ()
{
  abort ();
}


#if ! defined(GNUNET_CULL_LOGGING)
/**
 * Utility function - reallocates logdefs array to be twice as large.
 */
static void
resize_logdefs (void)
{
  logdefs_size = (logdefs_size + 1) * 2;
  logdefs = GNUNET_realloc (logdefs, logdefs_size * sizeof(struct LogDef));
}


/**
 * Rotate logs, deleting the oldest log.
 *
 * @param new_name new name to add to the rotation
 */
static void
log_rotate (const char *new_name)
{
  static char *rotation[ROTATION_KEEP];
  static unsigned int rotation_off;
  char *discard;

  if ('\0' == *new_name)
    return; /* not a real log file name */
  discard = rotation[rotation_off % ROTATION_KEEP];
  if (NULL != discard)
  {
    /* Note: can't log errors during logging (recursion!), so this
       operation MUST silently fail... */
    (void) unlink (discard);
    GNUNET_free (discard);
  }
  rotation[rotation_off % ROTATION_KEEP] = GNUNET_strdup (new_name);
  rotation_off++;
}


/**
 * Setup the log file.
 *
 * @param tm timestamp for which we should setup logging
 * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
 */
static int
setup_log_file (const struct tm *tm)
{
  static char last_fn[PATH_MAX + 1];
  char fn[PATH_MAX + 1];
  int altlog_fd;
  int dup_return;
  FILE *altlog;
  char *leftsquare;

  if (NULL == log_file_name)
    return GNUNET_SYSERR;
  if (0 == strftime (fn, sizeof(fn), log_file_name, tm))
    return GNUNET_SYSERR;
  leftsquare = strrchr (fn, '[');
  if ((NULL != leftsquare) && (']' == leftsquare[1]))
  {
    char *logfile_copy = GNUNET_strdup (fn);

    logfile_copy[leftsquare - fn] = '\0';
    logfile_copy[leftsquare - fn + 1] = '\0';
    snprintf (fn,
              PATH_MAX,
              "%s%d%s",
              logfile_copy,
              getpid (),
              &logfile_copy[leftsquare - fn + 2]);
    GNUNET_free (logfile_copy);
  }
  if (0 == strcmp (fn, last_fn))
    return GNUNET_OK; /* no change */
  log_rotate (last_fn);
  strcpy (last_fn, fn);
  if (GNUNET_SYSERR == GNUNET_DISK_directory_create_for_file (fn))
  {
    fprintf (stderr,
             "Failed to create directory for `%s': %s\n",
             fn,
             strerror (errno));
    return GNUNET_SYSERR;
  }
  altlog_fd = open (fn,
                    O_APPEND | O_WRONLY | O_CREAT,
                    S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);

  if (-1 != altlog_fd)
  {
    if (NULL != GNUNET_stderr)
      fclose (GNUNET_stderr);
    dup_return = dup2 (altlog_fd, 2);
    (void) close (altlog_fd);
    if (-1 != dup_return)
    {
      altlog = fdopen (2, "ab");
      if (NULL == altlog)
      {
        (void) close (2);
        altlog_fd = -1;
      }
    }
    else
    {
      altlog_fd = -1;
    }
  }
  if (-1 == altlog_fd)
  {
    GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "open", fn);
    return GNUNET_SYSERR;
  }
  GNUNET_stderr = altlog;
  return GNUNET_OK;
}


/**
 * Utility function - adds a parsed definition to logdefs array.
 *
 * @param component see struct LogDef, can't be NULL
 * @param file see struct LogDef, can't be NULL
 * @param function see struct LogDef, can't be NULL
 * @param from_line see struct LogDef
 * @param to_line see struct LogDef
 * @param level see struct LogDef, must be >= 0
 * @param force see struct LogDef
 * @return 0 on success, regex-specific error otherwise
 */
static int
add_definition (const char *component,
                const char *file,
                const char *function,
                int from_line,
                int to_line,
                int level,
                int force)
{
  struct LogDef n;
  int r;

  if (logdefs_size == logdefs_len)
    resize_logdefs ();
  memset (&n, 0, sizeof(n));
  if (0 == strlen (component))
    component = (char *) ".*";
  r = regcomp (&n.component_regex, (const char *) component, REG_NOSUB);
  if (0 != r)
  {
    return r;
  }
  if (0 == strlen (file))
    file = (char *) ".*";
  r = regcomp (&n.file_regex, (const char *) file, REG_NOSUB);
  if (0 != r)
  {
    regfree (&n.component_regex);
    return r;
  }
  if ((NULL == function) || (0 == strlen (function)))
    function = (char *) ".*";
  r = regcomp (&n.function_regex, (const char *) function, REG_NOSUB);
  if (0 != r)
  {
    regfree (&n.component_regex);
    regfree (&n.file_regex);
    return r;
  }
  n.from_line = from_line;
  n.to_line = to_line;
  n.level = level;
  n.force = force;
  logdefs[logdefs_len++] = n;
  return 0;
}


/**
 * Decides whether a particular logging call should or should not be allowed
 * to be made. Used internally by GNUNET_log*()
 *
 * @param caller_level loglevel the caller wants to use
 * @param comp component name the caller uses (NULL means that global
 *   component name is used)
 * @param file file name containing the logging call, usually __FILE__
 * @param function function which tries to make a logging call,
 *   usually __FUNCTION__
 * @param line line at which the call is made, usually __LINE__
 * @return 0 to disallow the call, 1 to allow it
 */
int
GNUNET_get_log_call_status (int caller_level,
                            const char *comp,
                            const char *file,
                            const char *function,
                            int line)
{
  struct LogDef *ld;
  int i;
  int force_only;

  if (NULL == comp)
    /* Use default component */
    comp = component_nopid;

  /* We have no definitions to override globally configured log level,
   * so just use it right away.
   */
  if ((min_level >= 0) && (GNUNET_NO == gnunet_force_log_present))
    return caller_level <= min_level;

  /* Only look for forced definitions? */
  force_only = min_level >= 0;
  for (i = 0; i < logdefs_len; i++)
  {
    ld = &logdefs[i];
    if (((! force_only) || ld->force) &&
        ((line >= ld->from_line) && (line <= ld->to_line) ) &&
        (0 == regexec (&ld->component_regex, comp, 0, NULL, 0)) &&
        (0 == regexec (&ld->file_regex, file, 0, NULL, 0)) &&
        (0 == regexec (&ld->function_regex, function, 0, NULL, 0)))
    {
      /* We're finished */
      return caller_level <= ld->level;
    }
  }
  /* No matches - use global level, if defined */
  if (min_level >= 0)
    return caller_level <= min_level;
  /* All programs/services previously defaulted to WARNING.
   * Now *we* default to WARNING, and THEY default to NULL.
   * Or rather we default to MESSAGE, since things aren't always bad.
   */
  return caller_level <= GNUNET_ERROR_TYPE_MESSAGE;
}


/**
 * Utility function - parses a definition
 *
 * Definition format:
 * component;file;function;from_line-to_line;level[/component...]
 * All entries are mandatory, but may be empty.
 * Empty entries for component, file and function are treated as
 * "matches anything".
 * Empty line entry is treated as "from 0 to INT_MAX"
 * Line entry with only one line is treated as "this line only"
 * Entry for level MUST NOT be empty.
 * Entries for component, file and function that consist of a
 * single character "*" are treated (at the moment) the same way
 * empty entries are treated (wildcard matching is not implemented (yet?)).
 * file entry is matched to the end of __FILE__. That is, it might be
 * a base name, or a base name with leading directory names (some compilers
 * define __FILE__ to absolute file path).
 *
 * @param constname name of the environment variable from which to get the
 *   string to be parsed
 * @param force 1 if definitions found in constname are to be forced
 * @return number of added definitions
 */
static int
parse_definitions (const char *constname, int force)
{
  char *def;
  const char *tmp;
  char *comp = NULL;
  char *file = NULL;
  char *function = NULL;
  char *p;
  char *start;
  char *t;
  short state;
  int level;
  int from_line, to_line;
  int counter = 0;
  int keep_looking = 1;

  tmp = getenv (constname);
  if (NULL == tmp)
    return 0;
  def = GNUNET_strdup (tmp);
  from_line = 0;
  to_line = INT_MAX;
  for (p = def, state = 0, start = def; keep_looking; p++)
  {
    switch (p[0])
    {
    case ';':     /* found a field separator */
      p[0] = '\0';
      switch (state)
      {
      case 0:       /* within a component name */
        comp = start;
        break;

      case 1:       /* within a file name */
        file = start;
        break;

      case 2:       /* within a function name */
        /* after a file name there must be a function name */
        function = start;
        break;

      case 3:       /* within a from-to line range */
        if (strlen (start) > 0)
        {
          errno = 0;
          from_line = strtol (start, &t, 10);
          if ((0 != errno) || (from_line < 0))
          {
            GNUNET_free (def);
            return counter;
          }
          if ((t < p) && ('-' == t[0]))
          {
            errno = 0;
            start = t + 1;
            to_line = strtol (start, &t, 10);
            if ((0 != errno) || (to_line < 0) || (t != p))
            {
              GNUNET_free (def);
              return counter;
            }
          }
          else         /* one number means "match this line only" */
            to_line = from_line;
        }
        else       /* default to 0-max */
        {
          from_line = 0;
          to_line = INT_MAX;
        }
        break;

      default:
        fprintf (
          stderr,
          _ ("ERROR: Unable to parse log definition: Syntax error at `%s'.\n"),
          p);
        break;
      }
      start = p + 1;
      state++;
      break;

    case '\0':     /* found EOL */
      keep_looking = 0;

    /* fall through to '/' */
    case '/':     /* found a definition separator */
      switch (state)
      {
      case 4:       /* within a log level */
        p[0] = '\0';
        state = 0;
        level = get_type ((const char *) start);
        if ((GNUNET_ERROR_TYPE_INVALID == level) ||
            (GNUNET_ERROR_TYPE_UNSPECIFIED == level) ||
            (0 != add_definition (comp,
                                  file,
                                  function,
                                  from_line,
                                  to_line,
                                  level,
                                  force)))
        {
          GNUNET_free (def);
          return counter;
        }
        counter++;
        start = p + 1;
        break;

      default:
        fprintf (
          stderr,
          _ ("ERROR: Unable to parse log definition: Syntax error at `%s'.\n"),
          p);
        break;
      }

    default:
      break;
    }
  }
  GNUNET_free (def);
  return counter;
}


/**
 * Utility function - parses GNUNET_LOG and GNUNET_FORCE_LOG.
 */
static void
parse_all_definitions ()
{
  if (GNUNET_NO == gnunet_force_log_parsed)
    gnunet_force_log_present =
      parse_definitions ("GNUNET_FORCE_LOG", 1) > 0 ? GNUNET_YES : GNUNET_NO;
  gnunet_force_log_parsed = GNUNET_YES;

  if (GNUNET_NO == gnunet_log_parsed)
    parse_definitions ("GNUNET_LOG", 0);
  gnunet_log_parsed = GNUNET_YES;
}


#endif


/**
 * Setup logging.
 *
 * @param comp default component to use
 * @param loglevel what types of messages should be logged
 * @param logfile which file to write log messages to (can be NULL)
 * @return #GNUNET_OK on success
 */
int
GNUNET_log_setup (const char *comp,
                  const char *loglevel,
                  const char *logfile)
{
  const char *env_logfile;

  min_level = get_type (loglevel);
#if ! defined(GNUNET_CULL_LOGGING)
  parse_all_definitions ();
#endif
  GNUNET_free (component);
  GNUNET_asprintf (&component, "%s-%d", comp, getpid ());
  GNUNET_free (component_nopid);
  component_nopid = GNUNET_strdup (comp);

  env_logfile = getenv ("GNUNET_FORCE_LOGFILE");
  if ((NULL != env_logfile) && (strlen (env_logfile) > 0))
    logfile = env_logfile;
  if (NULL == logfile)
    return GNUNET_OK;
  GNUNET_free (log_file_name);
  log_file_name = GNUNET_STRINGS_filename_expand (logfile);
  if (NULL == log_file_name)
    return GNUNET_SYSERR;
#if defined(GNUNET_CULL_LOGGING)
  /* log file option not allowed for wallet logic */
  GNUNET_assert (NULL == logfile);
  return GNUNET_OK;
#else
  {
    time_t t;
    const struct tm *tm;

    t = time (NULL);
    tm = gmtime (&t);
    return setup_log_file (tm);
  }
#endif
}


/**
 * Add a custom logger. Note that installing any custom logger
 * will disable the standard logger.  When multiple custom loggers
 * are installed, all will be called.  The standard logger will
 * only be used if no custom loggers are present.
 *
 * @param logger log function
 * @param logger_cls closure for @a logger
 */
void
GNUNET_logger_add (GNUNET_Logger logger, void *logger_cls)
{
  struct CustomLogger *entry;

  entry = GNUNET_new (struct CustomLogger);
  entry->logger = logger;
  entry->logger_cls = logger_cls;
  entry->next = loggers;
  loggers = entry;
}


/**
 * Remove a custom logger.
 *
 * @param logger log function
 * @param logger_cls closure for @a logger
 */
void
GNUNET_logger_remove (GNUNET_Logger logger, void *logger_cls)
{
  struct CustomLogger *pos;
  struct CustomLogger *prev;

  prev = NULL;
  pos = loggers;
  while ((NULL != pos) &&
         ((pos->logger != logger) || (pos->logger_cls != logger_cls)))
  {
    prev = pos;
    pos = pos->next;
  }
  GNUNET_assert (NULL != pos);
  if (NULL == prev)
    loggers = pos->next;
  else
    prev->next = pos->next;
  GNUNET_free (pos);
}


/**
 * Actually output the log message.
 *
 * @param kind how severe was the issue
 * @param comp component responsible
 * @param datestr current date/time
 * @param msg the actual message
 */
static void
output_message (enum GNUNET_ErrorType kind,
                const char *comp,
                const char *datestr,
                const char *msg)
{
  struct CustomLogger *pos;

  /* only use the standard logger if no custom loggers are present */
  if ((NULL != GNUNET_stderr) && (NULL == loggers))
  {
    if (kind == GNUNET_ERROR_TYPE_MESSAGE)
    {
      /* The idea here is to produce "normal" output messages
       * for end users while still having the power of the
       * logging engine for developer needs. So ideally this
       * is what it should look like when CLI tools are used
       * interactively, yet the same message shouldn't look
       * this way if the output is going to logfiles or robots
       * instead.
       */fprintf (GNUNET_stderr, "* %s", msg);
    }
    else if (GNUNET_YES == current_async_scope.have_scope)
    {
      static GNUNET_THREAD_LOCAL char id_buf[27];
      char *end;

      /* We're logging, so skip_log must be currently 0. */
      skip_log = 100;
      end = GNUNET_STRINGS_data_to_string (&current_async_scope.scope_id,
                                           sizeof(struct GNUNET_AsyncScopeId),
                                           id_buf,
                                           sizeof(id_buf) - 1);
      GNUNET_assert (NULL != end);
      *end = '\0';
      skip_log = 0;
      fprintf (GNUNET_stderr,
               "%s %s(%s) %s %s",
               datestr,
               comp,
               id_buf,
               GNUNET_error_type_to_string (kind),
               msg);
    }
    else
    {
      fprintf (GNUNET_stderr,
               "%s %s %s %s",
               datestr,
               comp,
               GNUNET_error_type_to_string (kind),
               msg);
    }
    fflush (GNUNET_stderr);
  }
  pos = loggers;
  while (NULL != pos)
  {
    pos->logger (pos->logger_cls, kind, comp, datestr, msg);
    pos = pos->next;
  }
}


/**
 * Flush an existing bulk report to the output.
 *
 * @param datestr our current timestamp
 */
static void
flush_bulk (const char *datestr)
{
  char msg[DATE_STR_SIZE + BULK_TRACK_SIZE + 256];
  int rev;
  char *last;
  const char *ft;

  if ((0 == last_bulk_time.abs_value_us) || (0 == last_bulk_repeat))
    return;
  rev = 0;
  last = memchr (last_bulk, '\0', BULK_TRACK_SIZE);
  if (last == NULL)
    last = &last_bulk[BULK_TRACK_SIZE - 1];
  else if (last != last_bulk)
    last--;
  if (last[0] == '\n')
  {
    rev = 1;
    last[0] = '\0';
  }
  ft =
    GNUNET_STRINGS_relative_time_to_string (GNUNET_TIME_absolute_get_duration (
                                              last_bulk_time),
                                            GNUNET_YES);
  snprintf (msg,
            sizeof(msg),
            _ ("Message `%.*s' repeated %u times in the last %s\n"),
            BULK_TRACK_SIZE,
            last_bulk,
            last_bulk_repeat,
            ft);
  if (rev == 1)
    last[0] = '\n';
  output_message (last_bulk_kind, last_bulk_comp, datestr, msg);
  last_bulk_time = GNUNET_TIME_absolute_get ();
  last_bulk_repeat = 0;
}


/**
 * Ignore the next n calls to the log function.
 *
 * @param n number of log calls to ignore (could be negative)
 * @param check_reset #GNUNET_YES to assert that the log skip counter is currently zero
 */
void
GNUNET_log_skip (int n, int check_reset)
{
  int ok;

  if (0 == n)
  {
    ok = (0 == skip_log);
    skip_log = 0;
    if (check_reset)
      GNUNET_break (ok);
  }
  else
  {
    skip_log += n;
  }
}


/**
 * Get the number of log calls that are going to be skipped
 *
 * @return number of log calls to be ignored
 */
int
GNUNET_get_log_skip ()
{
  return skip_log;
}


/**
 * Output a log message using the default mechanism.
 *
 * @param kind how severe was the issue
 * @param comp component responsible
 * @param message the actual message
 * @param va arguments to the format string "message"
 */
static void
mylog (enum GNUNET_ErrorType kind,
       const char *comp,
       const char *message,
       va_list va)
{
  char date[DATE_STR_SIZE];
  char date2[DATE_STR_SIZE];
  struct tm *tmptr;
  size_t size;
  va_list vacp;

  va_copy (vacp, va);
  size = vsnprintf (NULL, 0, message, vacp) + 1;
  GNUNET_assert (0 != size);
  va_end (vacp);
  memset (date, 0, DATE_STR_SIZE);
  {
    char buf[size];
    long long offset;

    struct timeval timeofday;

    gettimeofday (&timeofday, NULL);
    offset = GNUNET_TIME_get_offset ();
    if (offset > 0)
    {
      timeofday.tv_sec += offset / 1000LL;
      timeofday.tv_usec += (offset % 1000LL) * 1000LL;
      if (timeofday.tv_usec > 1000000LL)
      {
        timeofday.tv_usec -= 1000000LL;
        timeofday.tv_sec++;
      }
    }
    else
    {
      timeofday.tv_sec += offset / 1000LL;
      if (timeofday.tv_usec > -(offset % 1000LL) * 1000LL)
      {
        timeofday.tv_usec += (offset % 1000LL) * 1000LL;
      }
      else
      {
        timeofday.tv_usec += 1000000LL + (offset % 1000LL) * 1000LL;
        timeofday.tv_sec--;
      }
    }
    tmptr = localtime (&timeofday.tv_sec);
    if (NULL == tmptr)
    {
      strcpy (date, "localtime error");
    }
    else
    {
      /* RFC 3339 timestamp, with snprintf placeholder for microseconds */
      if (0 == strftime (date2, DATE_STR_SIZE, "%Y-%m-%dT%H:%M:%S.%%06u%z", tmptr))
        abort ();
      /* Fill in microseconds */
      if (0 > snprintf (date, sizeof(date), date2, timeofday.tv_usec))
        abort ();
    }

    vsnprintf (buf, size, message, va);
#if ! defined(GNUNET_CULL_LOGGING)
    if (NULL != tmptr)
      (void) setup_log_file (tmptr);
#endif
    if ((0 != (kind & GNUNET_ERROR_TYPE_BULK)) &&
        (0 != last_bulk_time.abs_value_us) &&
        (0 == strncmp (buf, last_bulk, sizeof(last_bulk))))
    {
      last_bulk_repeat++;
      if ((GNUNET_TIME_absolute_get_duration (last_bulk_time).rel_value_us >
           BULK_DELAY_THRESHOLD) ||
          (last_bulk_repeat > BULK_REPEAT_THRESHOLD))
        flush_bulk (date);
      return;
    }
    flush_bulk (date);
    GNUNET_strlcpy (last_bulk, buf, sizeof(last_bulk));
    last_bulk_repeat = 0;
    last_bulk_kind = kind;
    last_bulk_time = GNUNET_TIME_absolute_get ();
    GNUNET_strlcpy (last_bulk_comp, comp, sizeof(last_bulk_comp));
    output_message (kind, comp, date, buf);
  }
}


/**
 * Main log function.
 *
 * @param kind how serious is the error?
 * @param message what is the message (format string)
 * @param ... arguments for format string
 */
void
GNUNET_log_nocheck (enum GNUNET_ErrorType kind, const char *message, ...)
{
  va_list va;

  va_start (va, message);
  mylog (kind, component, message, va);
  va_end (va);
}


/**
 * Log function that specifies an alternative component.
 * This function should be used by plugins.
 *
 * @param kind how serious is the error?
 * @param comp component responsible for generating the message
 * @param message what is the message (format string)
 * @param ... arguments for format string
 */
void
GNUNET_log_from_nocheck (enum GNUNET_ErrorType kind,
                         const char *comp,
                         const char *message,
                         ...)
{
  va_list va;
  char comp_w_pid[128];

  if (comp == NULL)
    comp = component_nopid;

  va_start (va, message);
  GNUNET_snprintf (comp_w_pid, sizeof(comp_w_pid), "%s-%d", comp, getpid ());
  mylog (kind, comp_w_pid, message, va);
  va_end (va);
}


/**
 * Convert error type to string.
 *
 * @param kind type to convert
 * @return string corresponding to the type
 */
const char *
GNUNET_error_type_to_string (enum GNUNET_ErrorType kind)
{
  if ((kind & GNUNET_ERROR_TYPE_ERROR) > 0)
    return _ ("ERROR");
  if ((kind & GNUNET_ERROR_TYPE_WARNING) > 0)
    return _ ("WARNING");
  if ((kind & GNUNET_ERROR_TYPE_MESSAGE) > 0)
    return _ ("MESSAGE");
  if ((kind & GNUNET_ERROR_TYPE_INFO) > 0)
    return _ ("INFO");
  if ((kind & GNUNET_ERROR_TYPE_DEBUG) > 0)
    return _ ("DEBUG");
  if ((kind & ~GNUNET_ERROR_TYPE_BULK) == 0)
    return _ ("NONE");
  return _ ("INVALID");
}


/**
 * Convert a hash to a string (for printing debug messages).
 *
 * @param hc the hash code
 * @return string form; will be overwritten by next call to GNUNET_h2s.
 */
const char *
GNUNET_h2s (const struct GNUNET_HashCode *hc)
{
  static GNUNET_THREAD_LOCAL struct GNUNET_CRYPTO_HashAsciiEncoded ret;

  GNUNET_CRYPTO_hash_to_enc (hc, &ret);
  ret.encoding[8] = '\0';
  return (const char *) ret.encoding;
}


/**
 * Convert a hash to a string (for printing debug messages).
 * This is one of the very few calls in the entire API that is
 * NOT reentrant! Identical to #GNUNET_h2s(), except that another
 * buffer is used so both #GNUNET_h2s() and #GNUNET_h2s2() can be
 * used within the same log statement.
 *
 * @param hc the hash code
 * @return string form; will be overwritten by next call to GNUNET_h2s.
 */
const char *
GNUNET_h2s2 (const struct GNUNET_HashCode *hc)
{
  static GNUNET_THREAD_LOCAL struct GNUNET_CRYPTO_HashAsciiEncoded ret;

  GNUNET_CRYPTO_hash_to_enc (hc, &ret);
  ret.encoding[8] = '\0';
  return (const char *) ret.encoding;
}


/**
 * @ingroup logging
 * Convert a public key value to a string (for printing debug messages).
 * This is one of the very few calls in the entire API that is
 * NOT reentrant!
 *
 * @param hc the hash code
 * @return string
 */
const char *
GNUNET_p2s (const struct GNUNET_CRYPTO_EddsaPublicKey *p)
{
  static GNUNET_THREAD_LOCAL struct GNUNET_CRYPTO_HashAsciiEncoded ret;
  struct GNUNET_HashCode hc;

  GNUNET_CRYPTO_hash (p, sizeof(*p), &hc);
  GNUNET_CRYPTO_hash_to_enc (&hc, &ret);
  ret.encoding[6] = '\0';
  return (const char *) ret.encoding;
}


/**
 * @ingroup logging
 * Convert a public key value to a string (for printing debug messages).
 * This is one of the very few calls in the entire API that is
 * NOT reentrant!
 *
 * @param hc the hash code
 * @return string
 */
const char *
GNUNET_p2s2 (const struct GNUNET_CRYPTO_EddsaPublicKey *p)
{
  static GNUNET_THREAD_LOCAL struct GNUNET_CRYPTO_HashAsciiEncoded ret;
  struct GNUNET_HashCode hc;

  GNUNET_CRYPTO_hash (p, sizeof(*p), &hc);
  GNUNET_CRYPTO_hash_to_enc (&hc, &ret);
  ret.encoding[6] = '\0';
  return (const char *) ret.encoding;
}


/**
 * @ingroup logging
 * Convert a public key value to a string (for printing debug messages).
 * This is one of the very few calls in the entire API that is
 * NOT reentrant!
 *
 * @param hc the hash code
 * @return string
 */
const char *
GNUNET_e2s (const struct GNUNET_CRYPTO_EcdhePublicKey *p)
{
  static GNUNET_THREAD_LOCAL struct GNUNET_CRYPTO_HashAsciiEncoded ret;
  struct GNUNET_HashCode hc;

  GNUNET_CRYPTO_hash (p, sizeof(*p), &hc);
  GNUNET_CRYPTO_hash_to_enc (&hc, &ret);
  ret.encoding[6] = '\0';
  return (const char *) ret.encoding;
}


/**
 * @ingroup logging
 * Convert a public key value to a string (for printing debug messages).
 * This is one of the very few calls in the entire API that is
 * NOT reentrant!
 *
 * @param hc the hash code
 * @return string
 */
const char *
GNUNET_e2s2 (const struct GNUNET_CRYPTO_EcdhePublicKey *p)
{
  static GNUNET_THREAD_LOCAL struct GNUNET_CRYPTO_HashAsciiEncoded ret;
  struct GNUNET_HashCode hc;

  GNUNET_CRYPTO_hash (p, sizeof(*p), &hc);
  GNUNET_CRYPTO_hash_to_enc (&hc, &ret);
  ret.encoding[6] = '\0';
  return (const char *) ret.encoding;
}


/**
 * @ingroup logging
 * Convert a short hash value to a string (for printing debug messages).
 * This is one of the very few calls in the entire API that is
 * NOT reentrant!
 *
 * @param shc the hash code
 * @return string
 */
const char *
GNUNET_sh2s (const struct GNUNET_ShortHashCode *shc)
{
  static GNUNET_THREAD_LOCAL char buf[64];

  GNUNET_STRINGS_data_to_string (shc, sizeof(*shc), buf, sizeof(buf));
  buf[6] = '\0';
  return (const char *) buf;
}


/**
 * @ingroup logging
 * Convert a UUID to a string (for printing debug messages).
 * This is one of the very few calls in the entire API that is
 * NOT reentrant!
 *
 * @param uuid the UUID
 * @return string
 */
const char *
GNUNET_uuid2s (const struct GNUNET_Uuid *uuid)
{
  static GNUNET_THREAD_LOCAL char buf[32];

  GNUNET_STRINGS_data_to_string (uuid, sizeof(*uuid), buf, sizeof(buf));
  buf[6] = '\0';
  return (const char *) buf;
}


/**
 * Convert a hash to a string (for printing debug messages).
 * This is one of the very few calls in the entire API that is
 * NOT reentrant!
 *
 * @param hc the hash code
 * @return string form; will be overwritten by next call to GNUNET_h2s_full.
 */
const char *
GNUNET_h2s_full (const struct GNUNET_HashCode *hc)
{
  static GNUNET_THREAD_LOCAL struct GNUNET_CRYPTO_HashAsciiEncoded ret;

  GNUNET_CRYPTO_hash_to_enc (hc, &ret);
  ret.encoding[sizeof(ret) - 1] = '\0';
  return (const char *) ret.encoding;
}


/**
 * Convert a peer identity to a string (for printing debug messages).
 *
 * @param pid the peer identity
 * @return string form of the pid; will be overwritten by next
 *         call to #GNUNET_i2s.
 */
const char *
GNUNET_i2s (const struct GNUNET_PeerIdentity *pid)
{
  static GNUNET_THREAD_LOCAL char buf[5];
  char *ret;

  if (NULL == pid)
    return "NULL";
  ret = GNUNET_CRYPTO_eddsa_public_key_to_string (&pid->public_key);
  GNUNET_strlcpy (buf, ret, sizeof(buf));
  GNUNET_free (ret);
  return buf;
}


/**
 * Convert a peer identity to a string (for printing debug messages).
 * Identical to #GNUNET_i2s(), except that another
 * buffer is used so both #GNUNET_i2s() and #GNUNET_i2s2() can be
 * used within the same log statement.
 *
 * @param pid the peer identity
 * @return string form of the pid; will be overwritten by next
 *         call to #GNUNET_i2s.
 */
const char *
GNUNET_i2s2 (const struct GNUNET_PeerIdentity *pid)
{
  static GNUNET_THREAD_LOCAL char buf[5];
  char *ret;

  if (NULL == pid)
    return "NULL";
  ret = GNUNET_CRYPTO_eddsa_public_key_to_string (&pid->public_key);
  GNUNET_strlcpy (buf, ret, sizeof(buf));
  GNUNET_free (ret);
  return buf;
}


/**
 * Convert a peer identity to a string (for printing debug messages).
 *
 * @param pid the peer identity
 * @return string form of the pid; will be overwritten by next
 *         call to #GNUNET_i2s_full.
 */
const char *
GNUNET_i2s_full (const struct GNUNET_PeerIdentity *pid)
{
  static GNUNET_THREAD_LOCAL char buf[256];
  char *ret;

  ret = GNUNET_CRYPTO_eddsa_public_key_to_string (&pid->public_key);
  strcpy (buf, ret);
  GNUNET_free (ret);
  return buf;
}


/**
 * Convert a "struct sockaddr*" (IPv4 or IPv6 address) to a string
 * (for printing debug messages).  This is one of the very few calls
 * in the entire API that is NOT reentrant!
 *
 * @param addr the address
 * @param addrlen the length of the address in @a addr
 * @return nicely formatted string for the address
 *  will be overwritten by next call to #GNUNET_a2s.
 */
const char *
GNUNET_a2s (const struct sockaddr *addr, socklen_t addrlen)
{
#define LEN                           \
  GNUNET_MAX ((INET6_ADDRSTRLEN + 8), \
              (1 + sizeof(struct sockaddr_un) - sizeof(sa_family_t)))
  static GNUNET_THREAD_LOCAL char buf[LEN];
#undef LEN
  static GNUNET_THREAD_LOCAL char b2[6];
  const struct sockaddr_in *v4;
  const struct sockaddr_un *un;
  const struct sockaddr_in6 *v6;
  unsigned int off;

  if (addr == NULL)
    return _ ("unknown address");
  switch (addr->sa_family)
  {
  case AF_INET:
    if (addrlen != sizeof(struct sockaddr_in))
      return "<invalid v4 address>";
    v4 = (const struct sockaddr_in *) addr;
    inet_ntop (AF_INET, &v4->sin_addr, buf, INET_ADDRSTRLEN);
    if (0 == ntohs (v4->sin_port))
      return buf;
    strcat (buf, ":");
    GNUNET_snprintf (b2, sizeof(b2), "%u", ntohs (v4->sin_port));
    strcat (buf, b2);
    return buf;

  case AF_INET6:
    if (addrlen != sizeof(struct sockaddr_in6))
      return "<invalid v6 address>";
    v6 = (const struct sockaddr_in6 *) addr;
    buf[0] = '[';
    inet_ntop (AF_INET6, &v6->sin6_addr, &buf[1], INET6_ADDRSTRLEN);
    if (0 == ntohs (v6->sin6_port))
      return &buf[1];
    strcat (buf, "]:");
    GNUNET_snprintf (b2, sizeof(b2), "%u", ntohs (v6->sin6_port));
    strcat (buf, b2);
    return buf;

  case AF_UNIX:
    if (addrlen <= sizeof(sa_family_t))
      return "<unbound UNIX client>";
    un = (const struct sockaddr_un *) addr;
    off = 0;
    if ('\0' == un->sun_path[0])
      off++;
    memset (buf, 0, sizeof(buf));
    GNUNET_snprintf (buf,
                     sizeof(buf),
                     "%s%.*s",
                     (1 == off) ? "@" : "",
                     (int) (addrlen - sizeof(sa_family_t) - off),
                     &un->sun_path[off]);
    return buf;

  default:
    return _ ("invalid address");
  }
}


/**
 * Log error message about missing configuration option.
 *
 * @param kind log level
 * @param section section with missing option
 * @param option name of missing option
 */
void
GNUNET_log_config_missing (enum GNUNET_ErrorType kind,
                           const char *section,
                           const char *option)
{
  GNUNET_log (kind,
              _ (
                "Configuration fails to specify option `%s' in section `%s'!\n"),
              option,
              section);
}


/**
 * Log error message about invalid configuration option value.
 *
 * @param kind log level
 * @param section section with invalid option
 * @param option name of invalid option
 * @param required what is required that is invalid about the option
 */
void
GNUNET_log_config_invalid (enum GNUNET_ErrorType kind,
                           const char *section,
                           const char *option,
                           const char *required)
{
  GNUNET_log (
    kind,
    _ (
      "Configuration specifies invalid value for option `%s' in section `%s': %s\n"),
    option,
    section,
    required);
}


/**
 * Set the async scope for the current thread.
 *
 * @param aid the async scope identifier
 * @param old_scope[out] location to save the old scope
 */
void
GNUNET_async_scope_enter (const struct GNUNET_AsyncScopeId *aid,
                          struct GNUNET_AsyncScopeSave *old_scope)
{
  *old_scope = current_async_scope;
  current_async_scope.have_scope = GNUNET_YES;
  current_async_scope.scope_id = *aid;
}


/**
 * Clear the current thread's async scope.
 *
 * @param old_scope scope to restore
 */
void
GNUNET_async_scope_restore (struct GNUNET_AsyncScopeSave *old_scope)
{
  current_async_scope = *old_scope;
}


/**
 * Generate a fresh async scope identifier.
 *
 * @param[out] aid_ret pointer to where the result is stored
 */
void
GNUNET_async_scope_fresh (struct GNUNET_AsyncScopeId *aid_ret)
{
  GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK,
                              aid_ret,
                              sizeof(struct GNUNET_AsyncScopeId));
}


/**
 * Get the current async scope.
 *
 * @param[out] scope_ret pointer to where the result is stored
 */
void
GNUNET_async_scope_get (struct GNUNET_AsyncScopeSave *scope_ret)
{
  *scope_ret = current_async_scope;
}


/**
 * Initializer
 */
void __attribute__ ((constructor))
GNUNET_util_cl_init ()
{
  GNUNET_stderr = stderr;
}


/**
 * Destructor
 */
void __attribute__ ((destructor))
GNUNET_util_cl_fini ()
{

}


/* end of common_logging.c */