summaryrefslogtreecommitdiff
path: root/source3/lib/debug.c
blob: be5f66a562ab637f94fa7c4037f2d8ff7045492d (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
/*
   Unix SMB/CIFS implementation.
   Samba utility functions
   Copyright (C) Andrew Tridgell 1992-1998
   Copyright (C) Elrond               2002
   Copyright (C) Simo Sorce           2002

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"

/* -------------------------------------------------------------------------- **
 * Defines...
 *
 *  FORMAT_BUFR_MAX - Index of the last byte of the format buffer;
 *                    format_bufr[FORMAT_BUFR_MAX] should always be reserved
 *                    for a terminating null byte.
 */

#define FORMAT_BUFR_MAX ( sizeof( format_bufr ) - 1 )

/* -------------------------------------------------------------------------- **
 * This module implements Samba's debugging utility.
 *
 * The syntax of a debugging log file is represented as:
 *
 *  <debugfile> :== { <debugmsg> }
 *
 *  <debugmsg>  :== <debughdr> '\n' <debugtext>
 *
 *  <debughdr>  :== '[' TIME ',' LEVEL ']' [ [FILENAME ':'] [FUNCTION '()'] ]
 *
 *  <debugtext> :== { <debugline> }
 *
 *  <debugline> :== TEXT '\n'
 *
 * TEXT     is a string of characters excluding the newline character.
 * LEVEL    is the DEBUG level of the message (an integer in the range 0..10).
 * TIME     is a timestamp.
 * FILENAME is the name of the file from which the debug message was generated.
 * FUNCTION is the function from which the debug message was generated.
 *
 * Basically, what that all means is:
 *
 * - A debugging log file is made up of debug messages.
 *
 * - Each debug message is made up of a header and text.  The header is
 *   separated from the text by a newline.
 *
 * - The header begins with the timestamp and debug level of the message
 *   enclosed in brackets.  The filename and function from which the
 *   message was generated may follow.  The filename is terminated by a
 *   colon, and the function name is terminated by parenthesis.
 *
 * - The message text is made up of zero or more lines, each terminated by
 *   a newline.
 */

/* -------------------------------------------------------------------------- **
 * External variables.
 *
 *  dbf           - Global debug file handle.
 *  debugf        - Debug file name.
 *  append_log    - If True, then the output file will be opened in append
 *                  mode.
 *  DEBUGLEVEL    - System-wide debug message limit.  Messages with message-
 *                  levels higher than DEBUGLEVEL will not be processed.
 */

XFILE   *dbf        = NULL;
pstring debugf     = "";
BOOL    append_log = False;
BOOL    debug_warn_unknown_class = True;
BOOL    debug_auto_add_unknown_class = True;
BOOL    AllowDebugChange = True;

/*
 * This is to allow assignment to DEBUGLEVEL before the debug
 * system has been initialised.
 */
static int debug_all_class_hack = 1;
static BOOL debug_all_class_isset_hack = True;

static int debug_num_classes = 0;
int     *DEBUGLEVEL_CLASS = &debug_all_class_hack;
BOOL    *DEBUGLEVEL_CLASS_ISSET = &debug_all_class_isset_hack;

/* DEBUGLEVEL is #defined to *debug_level */
int     DEBUGLEVEL = &debug_all_class_hack;


/* -------------------------------------------------------------------------- **
 * Internal variables.
 *
 *  stdout_logging  - Default False, if set to True then dbf will be set to
 *                    stdout and debug output will go to dbf only, and not
 *                    to syslog.  Set in setup_logging() and read in Debug1().
 *
 *  debug_count     - Number of debug messages that have been output.
 *                    Used to check log size.
 *
 *  syslog_level    - Internal copy of the message debug level.  Written by
 *                    dbghdr() and read by Debug1().
 *
 *  format_bufr     - Used to format debug messages.  The dbgtext() function
 *                    prints debug messages to a string, and then passes the
 *                    string to format_debug_text(), which uses format_bufr
 *                    to build the formatted output.
 *
 *  format_pos      - Marks the first free byte of the format_bufr.
 * 
 *
 *  log_overflow    - When this variable is True, never attempt to check the
 *                    size of the log. This is a hack, so that we can write
 *                    a message using DEBUG, from open_logs() when we
 *                    are unable to open a new log file for some reason.
 */

static BOOL    stdout_logging = False;
static int     debug_count    = 0;
#ifdef WITH_SYSLOG
static int     syslog_level   = 0;
#endif
static pstring format_bufr    = { '\0' };
static size_t     format_pos     = 0;
static BOOL    log_overflow   = False;

/*
 * Define all the debug class selection names here. Names *MUST NOT* contain 
 * white space. There must be one name for each DBGC_<class name>, and they 
 * must be in the table in the order of DBGC_<class name>.. 
 */
static const char *default_classname_table[] = {
	"all",               /* DBGC_ALL; index refs traditional DEBUGLEVEL */
	"tdb",               /* DBGC_TDB	  */
	"printdrivers",      /* DBGC_PRINTDRIVERS */
	"lanman",            /* DBGC_LANMAN       */
	"smb",               /* DBGC_SMB          */
	"rpc_parse",         /* DBGC_RPC_PARSE    */
	"rpc_srv",           /* DBGC_RPC_SRV      */
	"rpc_cli",           /* DBGC_RPC_CLI      */
	"passdb",            /* DBGC_PASSDB       */
	"auth",              /* DBGC_AUTH         */
	"winbind",           /* DBGC_WINBIND      */
	NULL
};

static char **classname_table = NULL;


/* -------------------------------------------------------------------------- **
 * Functions...
 */


/****************************************************************************
utility lists registered debug class names's
****************************************************************************/

#define MAX_CLASS_NAME_SIZE 1024

static char *debug_list_class_names_and_levels(void)
{
	int i, dim;
	char **list;
	char *buf = NULL;
	char *b;
	BOOL err = False;

	if (DEBUGLEVEL_CLASS == &debug_all_class_hack)
		return NULL;

	list = calloc(debug_num_classes + 1, sizeof(char *));
	if (!list)
		return NULL;

	/* prepare strings */
	for (i = 0, dim = 0; i < debug_num_classes; i++) {
		int l = asprintf(&list[i],
				"%s:%d ",
				classname_table[i],
				DEBUGLEVEL_CLASS_ISSET[i]?DEBUGLEVEL_CLASS[i]:DEBUGLEVEL);
		if (l < 0 || l > MAX_CLASS_NAME_SIZE) {
			err = True;
			goto done;
		}
		dim += l;
	}

	/* create single string list */
	b = buf = malloc(dim);
	if (!buf) {
		err = True;
		goto done;
	}
	for (i = 0; i < debug_num_classes; i++) {
		int l = strlen(list[i]);
		strncpy(b, list[i], l);
		b = b + l;
	}
	b[-1] = '\0';

done:
	/* free strings list */
	for (i = 0; i < debug_num_classes; i++)
		if (list[i]) free(list[i]);
	free(list);

	if (err) {
		if (buf)
			free(buf);
		return NULL;
	} else {
		return buf;
	}
}

/****************************************************************************
utility access to debug class names's
****************************************************************************/
const char *debug_classname_from_index(int ndx)
{
	if (ndx < 0 || ndx >= debug_num_classes)
		return NULL;
	else
		return classname_table[ndx];
}

/****************************************************************************
utility to translate names to debug class index's (internal version)
****************************************************************************/
static int debug_lookup_classname_int(const char* classname)
{
	int i;

	if (!classname) return -1;

	for (i=0; i < debug_num_classes; i++) {
		if (strcmp(classname, classname_table[i])==0)
			return i;
	}
	return -1;
}

/****************************************************************************
Add a new debug class to the system
****************************************************************************/
int debug_add_class(const char *classname)
{
	int ndx;
	void *new_ptr;

	if (!classname)
		return -1;

	/* check the init has yet been called */
	debug_init();

	ndx = debug_lookup_classname_int(classname);
	if (ndx >= 0)
		return ndx;
	ndx = debug_num_classes;

	new_ptr = DEBUGLEVEL_CLASS;
	if (DEBUGLEVEL_CLASS == &debug_all_class_hack)
	{
		/* Initial loading... */
		new_ptr = NULL;
	}
	new_ptr = Realloc(new_ptr,
			  sizeof(int) * (debug_num_classes + 1));
	if (!new_ptr)
		return -1;
	DEBUGLEVEL_CLASS = new_ptr;
	DEBUGLEVEL_CLASS[ndx] = 0;

	/* debug_level is the pointer used for the DEBUGLEVEL-thingy */
	if (ndx==0)
	{
		/* Transfer the initial level from debug_all_class_hack */
		DEBUGLEVEL_CLASS[ndx] = DEBUGLEVEL;
	}
	debug_level = DEBUGLEVEL_CLASS;

	new_ptr = DEBUGLEVEL_CLASS_ISSET;
	if (new_ptr == &debug_all_class_isset_hack)
	{
		new_ptr = NULL;
	}
	new_ptr = Realloc(new_ptr,
			  sizeof(BOOL) * (debug_num_classes + 1));
	if (!new_ptr)
		return -1;
	DEBUGLEVEL_CLASS_ISSET = new_ptr;
	DEBUGLEVEL_CLASS_ISSET[ndx] = False;

	new_ptr = Realloc(classname_table,
			  sizeof(char *) * (debug_num_classes + 1));
	if (!new_ptr)
		return -1;
	classname_table = new_ptr;

	classname_table[ndx] = strdup(classname);
	if (! classname_table[ndx])
		return -1;
	
	debug_num_classes++;

	return ndx;
}

/****************************************************************************
utility to translate names to debug class index's (public version)
****************************************************************************/
int debug_lookup_classname(const char *classname)
{
	int ndx;
       
	if (!classname || !*classname) return -1;

	ndx = debug_lookup_classname_int(classname);

	if (ndx != -1)
		return ndx;

	if (debug_warn_unknown_class)
	{
		DEBUG(0, ("debug_lookup_classname(%s): Unknown class\n",
			  classname));
	}
	if (debug_auto_add_unknown_class)
	{
		return debug_add_class(classname);
	}
	return -1;
}


/****************************************************************************
dump the current registered denug levels
****************************************************************************/
static void debug_dump_status(int level)
{
	int q;

	DEBUG(level, ("INFO: Current debug levels:\n"));
	for (q = 0; q < debug_num_classes; q++)
	{
		DEBUGADD(level, ("  %s: %s/%d\n",
				 classname_table[q],
				 (DEBUGLEVEL_CLASS_ISSET[q]
				  ? "True" : "False"),
				 DEBUGLEVEL_CLASS[q]));
	}
}

/****************************************************************************
parse the debug levels from smbcontrol. Example debug level parameter:
  printdrivers:7
****************************************************************************/
BOOL debug_parse_params(char **params, int *debuglevel_class,
			BOOL *debuglevel_class_isset)
{
	int   i, ndx;
	char *class_name;
	char *class_level;

	if (!params)
		return False;

	/* Allow DBGC_ALL to be specified w/o requiring its class name e.g."10"  
	 * v.s. "all:10", this is the traditional way to set DEBUGLEVEL 
	 */
	if (isdigit((int)params[0][0])) {
		debuglevel_class[DBGC_ALL] = atoi(params[0]);
		debuglevel_class_isset[DBGC_ALL] = True;
		i = 1; /* start processing at the next params */
	}
	else
		i = 0; /* DBGC_ALL not specified OR class name was included */

	/* Fill in new debug class levels */
	for (; i < debug_num_classes && params[i]; i++) {
		if ((class_name=strtok(params[i],":")) &&
			(class_level=strtok(NULL, "\0")) &&
            ((ndx = debug_lookup_classname(class_name)) != -1)) {
				debuglevel_class[ndx] = atoi(class_level);
				debuglevel_class_isset[ndx] = True;
		} else {
			DEBUG(0,("debug_parse_params: unrecognized debug class name or format [%s]\n", params[i]));
			return False;
		}
	}

	return True;
}

/****************************************************************************
parse the debug levels from smb.conf. Example debug level string:
  3 tdb:5 printdrivers:7
Note: the 1st param has no "name:" preceeding it.
****************************************************************************/
BOOL debug_parse_levels(const char *params_str)
{
	char **params;

	/* Just in case */
	debug_init();

	if (AllowDebugChange == False)
		return True;

	params = str_list_make(params_str);

	if (debug_parse_params(params, DEBUGLEVEL_CLASS,
			       DEBUGLEVEL_CLASS_ISSET))
	{
		debug_dump_status(5);
		str_list_free(&params);
		return True;
	} else {
		str_list_free(&params);
		return False;
	}
}

/****************************************************************************
receive a "set debug level" message
****************************************************************************/
static void debug_message(int msg_type, pid_t src, void *buf, size_t len)
{
	const char *params_str = buf;

	/* Check, it's a proper string! */
	if (params_str[len-1] != '\0')
	{
		DEBUG(1, ("Invalid debug message from pid %u to pid %u\n",
			  (unsigned int)src, (unsigned int)getpid()));
		return;
	}

	DEBUG(3, ("INFO: Remote set of debug to `%s'  (pid %u from pid %u)\n",
		  params_str, (unsigned int)getpid(), (unsigned int)src));

	debug_parse_levels(params_str);
}


/****************************************************************************
send a "set debug level" message
****************************************************************************/
void debug_message_send(pid_t pid, const char *params_str)
{
	if (!params_str)
		return;
	message_send_pid(pid, MSG_DEBUG, params_str, strlen(params_str) + 1,
			 False);
}


/****************************************************************************
 Return current debug level.
****************************************************************************/

static void debuglevel_message(int msg_type, pid_t src, void *buf, size_t len)
{
	char *debug_level_classes;
	DEBUG(1,("INFO: Received REQ_DEBUGLEVEL message from PID %u\n",(unsigned int)src));

	if ((debug_level_classes = debug_list_class_names_and_levels())) {
	/*{ debug_level_classes = "test:1000";*/
		message_send_pid(src, MSG_DEBUGLEVEL, debug_level_classes, strlen(debug_level_classes) + 1, True);
		SAFE_FREE(debug_level_classes);
	} else {
		DEBUG(0, ("debuglevel_message: error retrieving class levels!\n"));
	}
}

/****************************************************************************
Init debugging (one time stuff)
****************************************************************************/
void debug_init(void)
{
	static BOOL initialised = False;
	const char **p;

	if (initialised)
		return;
	
	initialised = True;

	message_register(MSG_DEBUG, debug_message);
	message_register(MSG_REQ_DEBUGLEVEL, debuglevel_message);

	for(p = default_classname_table; *p; p++)
	{
		debug_add_class(*p);
	}
}


/* ************************************************************************** **
 * get ready for syslog stuff
 * ************************************************************************** **
 */
void setup_logging(const char *pname, BOOL interactive)
{
	debug_init();

	/* reset to allow multiple setup calls, going from interactive to
	   non-interactive */
	stdout_logging = False;
	dbf = NULL;

	if (interactive) {
		stdout_logging = True;
		dbf = x_stdout;
	}
#ifdef WITH_SYSLOG
	else {
		const char *p = strrchr_m( pname,'/' );
		if (p)
			pname = p + 1;
#ifdef LOG_DAEMON
		openlog( pname, LOG_PID, SYSLOG_FACILITY );
#else
		/* for old systems that have no facility codes. */
		openlog( pname, LOG_PID );
#endif
	}
#endif
} /* setup_logging */

/* ************************************************************************** **
 * reopen the log files
 * note that we now do this unconditionally
 * We attempt to open the new debug fp before closing the old. This means
 * if we run out of fd's we just keep using the old fd rather than aborting.
 * Fix from dgibson@linuxcare.com.
 * ************************************************************************** **
 */

BOOL reopen_logs( void )
{
	pstring fname;
	mode_t oldumask;
	XFILE *new_dbf = NULL;
	BOOL ret = True;

	if (stdout_logging)
		return True;

	oldumask = umask( 022 );
  
	pstrcpy(fname, debugf );

	if (lp_loaded()) {
		char *logfname;

		logfname = lp_logfile();
		if (*logfname)
			pstrcpy(fname, logfname);
	}

	pstrcpy( debugf, fname );
	if (append_log)
		new_dbf = x_fopen( debugf, O_WRONLY|O_APPEND|O_CREAT, 0644);
	else
		new_dbf = x_fopen( debugf, O_WRONLY|O_CREAT|O_TRUNC, 0644 );

	if (!new_dbf) {
		log_overflow = True;
		DEBUG(0, ("Unable to open new log file %s: %s\n", debugf, strerror(errno)));
		log_overflow = False;
		if (dbf)
			x_fflush(dbf);
		ret = False;
	} else {
		x_setbuf(new_dbf, NULL);
		if (dbf)
			(void) x_fclose(dbf);
		dbf = new_dbf;
	}

	/* Fix from klausr@ITAP.Physik.Uni-Stuttgart.De
	 * to fix problem where smbd's that generate less
	 * than 100 messages keep growing the log.
	 */
	force_check_log_size();
	(void)umask(oldumask);

	/* Take over stderr to catch ouput into logs */
	if (dbf && sys_dup2(dbf->fd, 2) == -1) {
		close_low_fds(True); /* Close stderr too, if dup2 can't point it
					at the logfile */
	}

	return ret;
}

/* ************************************************************************** **
 * Force a check of the log size.
 * ************************************************************************** **
 */
void force_check_log_size( void )
{
  debug_count = 100;
}

/***************************************************************************
 Check to see if there is any need to check if the logfile has grown too big.
**************************************************************************/

BOOL need_to_check_log_size( void )
{
	int maxlog;

	if( debug_count++ < 100 )
		return( False );

	maxlog = lp_max_log_size() * 1024;
	if( !dbf || maxlog <= 0 ) {
		debug_count = 0;
		return(False);
	}
	return( True );
}

/* ************************************************************************** **
 * Check to see if the log has grown to be too big.
 * ************************************************************************** **
 */

void check_log_size( void )
{
	int         maxlog;
	SMB_STRUCT_STAT st;

	/*
	 *  We need to be root to check/change log-file, skip this and let the main
	 *  loop check do a new check as root.
	 */

	if( geteuid() != 0 )
		return;

	if(log_overflow || !need_to_check_log_size() )
		return;

	maxlog = lp_max_log_size() * 1024;

	if( sys_fstat( x_fileno( dbf ), &st ) == 0 && st.st_size > maxlog ) {
		(void)reopen_logs();
		if( dbf && get_file_size( debugf ) > maxlog ) {
			pstring name;

			slprintf( name, sizeof(name)-1, "%s.old", debugf );
			(void)rename( debugf, name );
      
			if (!reopen_logs()) {
				/* We failed to reopen a log - continue using the old name. */
				(void)rename(name, debugf);
			}
		}
	}

	/*
	 * Here's where we need to panic if dbf == NULL..
	 */

	if(dbf == NULL) {
		/* This code should only be reached in very strange
		 * circumstances. If we merely fail to open the new log we
		 * should stick with the old one. ergo this should only be
		 * reached when opening the logs for the first time: at
		 * startup or when the log level is increased from zero.
		 * -dwg 6 June 2000
		 */
		dbf = x_fopen( "/dev/console", O_WRONLY, 0);
		if(dbf) {
			DEBUG(0,("check_log_size: open of debug file %s failed - using console.\n",
					debugf ));
		} else {
			/*
			 * We cannot continue without a debug file handle.
			 */
			abort();
		}
	}
	debug_count = 0;
} /* check_log_size */

/* ************************************************************************** **
 * Write an debug message on the debugfile.
 * This is called by dbghdr() and format_debug_text().
 * ************************************************************************** **
 */
 int Debug1( char *format_str, ... )
{
  va_list ap;  
  int old_errno = errno;

  if( stdout_logging )
    {
    va_start( ap, format_str );
    if(dbf)
      (void)x_vfprintf( dbf, format_str, ap );
    va_end( ap );
    errno = old_errno;
    return( 0 );
    }
  
#ifdef WITH_SYSLOG
  if( !lp_syslog_only() )
#endif
    {
    if( !dbf )
      {
      mode_t oldumask = umask( 022 );

      if( append_log )
        dbf = x_fopen( debugf, O_WRONLY|O_APPEND|O_CREAT, 0644 );
      else
        dbf = x_fopen( debugf, O_WRONLY|O_CREAT|O_TRUNC, 0644 );
      (void)umask( oldumask );
      if( dbf )
        {
        x_setbuf( dbf, NULL );
        }
      else
        {
        errno = old_errno;
        return(0);
        }
      }
    }

#ifdef WITH_SYSLOG
  if( syslog_level < lp_syslog() )
    {
    /* map debug levels to syslog() priorities
     * note that not all DEBUG(0, ...) calls are
     * necessarily errors
     */
    static int priority_map[] = { 
      LOG_ERR,     /* 0 */
      LOG_WARNING, /* 1 */
      LOG_NOTICE,  /* 2 */
      LOG_INFO,    /* 3 */
      };
    int     priority;
    pstring msgbuf;

    if( syslog_level >= ( sizeof(priority_map) / sizeof(priority_map[0]) )
     || syslog_level < 0)
      priority = LOG_DEBUG;
    else
      priority = priority_map[syslog_level];
      
    va_start( ap, format_str );
    vslprintf( msgbuf, sizeof(msgbuf)-1, format_str, ap );
    va_end( ap );
      
    msgbuf[255] = '\0';
    syslog( priority, "%s", msgbuf );
    }
#endif
  
  check_log_size();

#ifdef WITH_SYSLOG
  if( !lp_syslog_only() )
#endif
    {
    va_start( ap, format_str );
    if(dbf)
      (void)x_vfprintf( dbf, format_str, ap );
    va_end( ap );
    if(dbf)
      (void)x_fflush( dbf );
    }

  errno = old_errno;

  return( 0 );
  } /* Debug1 */


/* ************************************************************************** **
 * Print the buffer content via Debug1(), then reset the buffer.
 *
 *  Input:  none
 *  Output: none
 *
 * ************************************************************************** **
 */
static void bufr_print( void )
  {
  format_bufr[format_pos] = '\0';
  (void)Debug1( "%s", format_bufr );
  format_pos = 0;
  } /* bufr_print */

/* ************************************************************************** **
 * Format the debug message text.
 *
 *  Input:  msg - Text to be added to the "current" debug message text.
 *
 *  Output: none.
 *
 *  Notes:  The purpose of this is two-fold.  First, each call to syslog()
 *          (used by Debug1(), see above) generates a new line of syslog
 *          output.  This is fixed by storing the partial lines until the
 *          newline character is encountered.  Second, printing the debug
 *          message lines when a newline is encountered allows us to add
 *          spaces, thus indenting the body of the message and making it
 *          more readable.
 *
 * ************************************************************************** **
 */
static void format_debug_text( char *msg )
  {
  size_t i;
  BOOL timestamp = (!stdout_logging && (lp_timestamp_logs() || 
					!(lp_loaded())));

  for( i = 0; msg[i]; i++ )
    {
    /* Indent two spaces at each new line. */
    if(timestamp && 0 == format_pos)
      {
      format_bufr[0] = format_bufr[1] = ' ';
      format_pos = 2;
      }

    /* If there's room, copy the character to the format buffer. */
    if( format_pos < FORMAT_BUFR_MAX )
      format_bufr[format_pos++] = msg[i];

    /* If a newline is encountered, print & restart. */
    if( '\n' == msg[i] )
      bufr_print();

    /* If the buffer is full dump it out, reset it, and put out a line
     * continuation indicator.
     */
    if( format_pos >= FORMAT_BUFR_MAX )
      {
      bufr_print();
      (void)Debug1( " +>\n" );
      }
    }

  /* Just to be safe... */
  format_bufr[format_pos] = '\0';
  } /* format_debug_text */

/* ************************************************************************** **
 * Flush debug output, including the format buffer content.
 *
 *  Input:  none
 *  Output: none
 *
 * ************************************************************************** **
 */
void dbgflush( void )
  {
  bufr_print();
  if(dbf)
    (void)x_fflush( dbf );
  } /* dbgflush */

/* ************************************************************************** **
 * Print a Debug Header.
 *
 *  Input:  level - Debug level of the message (not the system-wide debug
 *                  level. )
 *          file  - Pointer to a string containing the name of the file
 *                  from which this function was called, or an empty string
 *                  if the __FILE__ macro is not implemented.
 *          func  - Pointer to a string containing the name of the function
 *                  from which this function was called, or an empty string
 *                  if the __FUNCTION__ macro is not implemented.
 *          line  - line number of the call to dbghdr, assuming __LINE__
 *                  works.
 *
 *  Output: Always True.  This makes it easy to fudge a call to dbghdr()
 *          in a macro, since the function can be called as part of a test.
 *          Eg: ( (level <= DEBUGLEVEL) && (dbghdr(level,"",line)) )
 *
 *  Notes:  This function takes care of setting syslog_level.
 *
 * ************************************************************************** **
 */

BOOL dbghdr( int level, char *file, char *func, int line )
{
  /* Ensure we don't lose any real errno value. */
  int old_errno = errno;

  if( format_pos ) {
    /* This is a fudge.  If there is stuff sitting in the format_bufr, then
     * the *right* thing to do is to call
     *   format_debug_text( "\n" );
     * to write the remainder, and then proceed with the new header.
     * Unfortunately, there are several places in the code at which
     * the DEBUG() macro is used to build partial lines.  That in mind,
     * we'll work under the assumption that an incomplete line indicates
     * that a new header is *not* desired.
     */
    return( True );
  }

#ifdef WITH_SYSLOG
  /* Set syslog_level. */
  syslog_level = level;
#endif

  /* Don't print a header if we're logging to stdout. */
  if( stdout_logging )
    return( True );

  /* Print the header if timestamps are turned on.  If parameters are
   * not yet loaded, then default to timestamps on.
   */
  if( lp_timestamp_logs() || !(lp_loaded()) ) {
    char header_str[200];

	header_str[0] = '\0';

	if( lp_debug_pid())
	  slprintf(header_str,sizeof(header_str)-1,", pid=%u",(unsigned int)sys_getpid());

	if( lp_debug_uid()) {
      size_t hs_len = strlen(header_str);
	  slprintf(header_str + hs_len,
               sizeof(header_str) - 1 - hs_len,
			   ", effective(%u, %u), real(%u, %u)",
               (unsigned int)geteuid(), (unsigned int)getegid(),
			   (unsigned int)getuid(), (unsigned int)getgid()); 
	}
  
    /* Print it all out at once to prevent split syslog output. */
    (void)Debug1( "[%s, %d%s] %s:%s(%d)\n",
                  timestring(lp_debug_hires_timestamp()), level,
				  header_str, file, func, line );
  }

  errno = old_errno;
  return( True );
}

/* ************************************************************************** **
 * Add text to the body of the "current" debug message via the format buffer.
 *
 *  Input:  format_str  - Format string, as used in printf(), et. al.
 *          ...         - Variable argument list.
 *
 *  ..or..  va_alist    - Old style variable parameter list starting point.
 *
 *  Output: Always True.  See dbghdr() for more info, though this is not
 *          likely to be used in the same way.
 *
 * ************************************************************************** **
 */
 BOOL dbgtext( char *format_str, ... )
  {
  va_list ap;
  pstring msgbuf;

  va_start( ap, format_str ); 
  vslprintf( msgbuf, sizeof(msgbuf)-1, format_str, ap );
  va_end( ap );

  format_debug_text( msgbuf );

  return( True );
  } /* dbgtext */


/* ************************************************************************** */