source: trunk/server/source3/lib/debug.c@ 559

Last change on this file since 559 was 414, checked in by Herwig Bauernfeind, 16 years ago

Samba 3.5.0: Initial import
File size: 29.4 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 Samba utility functions
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Elrond 2002
6 Copyright (C) Simo Sorce 2002
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20*/
21
22#include "includes.h"
23
24/* -------------------------------------------------------------------------- **
25 * Defines...
26 *
27 * FORMAT_BUFR_MAX - Index of the last byte of the format buffer;
28 * format_bufr[FORMAT_BUFR_MAX] should always be reserved
29 * for a terminating null byte.
30 */
31
32#define FORMAT_BUFR_SIZE 1024
33#define FORMAT_BUFR_MAX (FORMAT_BUFR_SIZE - 1)
34
35/* -------------------------------------------------------------------------- **
36 * This module implements Samba's debugging utility.
37 *
38 * The syntax of a debugging log file is represented as:
39 *
40 * <debugfile> :== { <debugmsg> }
41 *
42 * <debugmsg> :== <debughdr> '\n' <debugtext>
43 *
44 * <debughdr> :== '[' TIME ',' LEVEL ']' [ [FILENAME ':'] [FUNCTION '()'] ]
45 *
46 * <debugtext> :== { <debugline> }
47 *
48 * <debugline> :== TEXT '\n'
49 *
50 * TEXT is a string of characters excluding the newline character.
51 * LEVEL is the DEBUG level of the message (an integer in the range 0..10).
52 * TIME is a timestamp.
53 * FILENAME is the name of the file from which the debug message was generated.
54 * FUNCTION is the function from which the debug message was generated.
55 *
56 * Basically, what that all means is:
57 *
58 * - A debugging log file is made up of debug messages.
59 *
60 * - Each debug message is made up of a header and text. The header is
61 * separated from the text by a newline.
62 *
63 * - The header begins with the timestamp and debug level of the message
64 * enclosed in brackets. The filename and function from which the
65 * message was generated may follow. The filename is terminated by a
66 * colon, and the function name is terminated by parenthesis.
67 *
68 * - The message text is made up of zero or more lines, each terminated by
69 * a newline.
70 */
71
72/* -------------------------------------------------------------------------- **
73 * External variables.
74 *
75 * dbf - Global debug file handle.
76 * debugf - Debug file name.
77 * DEBUGLEVEL - System-wide debug message limit. Messages with message-
78 * levels higher than DEBUGLEVEL will not be processed.
79 */
80
81XFILE *dbf = NULL;
82static char *debugf = NULL;
83bool debug_warn_unknown_class = True;
84bool debug_auto_add_unknown_class = True;
85bool AllowDebugChange = True;
86
87/*
88 used to check if the user specified a
89 logfile on the command line
90*/
91bool override_logfile;
92
93/*
94 * This is to allow assignment to DEBUGLEVEL before the debug
95 * system has been initialized.
96 */
97static int debug_all_class_hack = 1;
98static bool debug_all_class_isset_hack = True;
99
100static int debug_num_classes = 0;
101int *DEBUGLEVEL_CLASS = &debug_all_class_hack;
102bool *DEBUGLEVEL_CLASS_ISSET = &debug_all_class_isset_hack;
103
104/* DEBUGLEVEL is #defined to *debug_level */
105int DEBUGLEVEL = &debug_all_class_hack;
106
107
108/* -------------------------------------------------------------------------- **
109 * Internal variables.
110 *
111 * stdout_logging - Default False, if set to True then dbf will be set to
112 * stdout and debug output will go to dbf only, and not
113 * to syslog. Set in setup_logging() and read in Debug1().
114 *
115 * debug_count - Number of debug messages that have been output.
116 * Used to check log size.
117 *
118 * syslog_level - Internal copy of the message debug level. Written by
119 * dbghdr() and read by Debug1().
120 *
121 * format_bufr - Used to format debug messages. The dbgtext() function
122 * prints debug messages to a string, and then passes the
123 * string to format_debug_text(), which uses format_bufr
124 * to build the formatted output.
125 *
126 * format_pos - Marks the first free byte of the format_bufr.
127 *
128 *
129 * log_overflow - When this variable is True, never attempt to check the
130 * size of the log. This is a hack, so that we can write
131 * a message using DEBUG, from open_logs() when we
132 * are unable to open a new log file for some reason.
133 */
134
135static bool stdout_logging = False;
136static int debug_count = 0;
137#ifdef WITH_SYSLOG
138static int syslog_level = 0;
139#endif
140static char *format_bufr = NULL;
141static size_t format_pos = 0;
142static bool log_overflow = False;
143
144/*
145 * Define all the debug class selection names here. Names *MUST NOT* contain
146 * white space. There must be one name for each DBGC_<class name>, and they
147 * must be in the table in the order of DBGC_<class name>..
148 */
149static const char *default_classname_table[] = {
150 "all", /* DBGC_ALL; index refs traditional DEBUGLEVEL */
151 "tdb", /* DBGC_TDB */
152 "printdrivers", /* DBGC_PRINTDRIVERS */
153 "lanman", /* DBGC_LANMAN */
154 "smb", /* DBGC_SMB */
155 "rpc_parse", /* DBGC_RPC_PARSE */
156 "rpc_srv", /* DBGC_RPC_SRV */
157 "rpc_cli", /* DBGC_RPC_CLI */
158 "passdb", /* DBGC_PASSDB */
159 "sam", /* DBGC_SAM */
160 "auth", /* DBGC_AUTH */
161 "winbind", /* DBGC_WINBIND */
162 "vfs", /* DBGC_VFS */
163 "idmap", /* DBGC_IDMAP */
164 "quota", /* DBGC_QUOTA */
165 "acls", /* DBGC_ACLS */
166 "locking", /* DBGC_LOCKING */
167 "msdfs", /* DBGC_MSDFS */
168 "dmapi", /* DBGC_DMAPI */
169 "registry", /* DBGC_REGISTRY */
170 NULL
171};
172
173static char **classname_table = NULL;
174
175
176/* -------------------------------------------------------------------------- **
177 * Functions...
178 */
179
180/***************************************************************************
181 Free memory pointed to by global pointers.
182****************************************************************************/
183
184static bool initialized;
185
186void gfree_debugsyms(void)
187{
188 int i;
189
190 if ( classname_table ) {
191 for ( i = 0; i < debug_num_classes; i++ ) {
192 SAFE_FREE( classname_table[i] );
193 }
194 SAFE_FREE( classname_table );
195 }
196
197 if ( DEBUGLEVEL_CLASS != &debug_all_class_hack ) {
198 SAFE_FREE( DEBUGLEVEL_CLASS );
199 DEBUGLEVEL_CLASS = &debug_all_class_hack;
200 }
201
202 if ( DEBUGLEVEL_CLASS_ISSET != &debug_all_class_isset_hack ) {
203 SAFE_FREE( DEBUGLEVEL_CLASS_ISSET );
204 DEBUGLEVEL_CLASS_ISSET = &debug_all_class_isset_hack;
205 }
206
207 SAFE_FREE(format_bufr);
208
209 debug_num_classes = 0;
210
211 debug_level = DEBUGLEVEL_CLASS;
212
213 initialized = false;
214}
215
216/****************************************************************************
217utility lists registered debug class names's
218****************************************************************************/
219
220#define MAX_CLASS_NAME_SIZE 1024
221
222static char *debug_list_class_names_and_levels(void)
223{
224 int i, dim;
225 char **list;
226 char *buf = NULL;
227 char *b;
228 bool err = False;
229
230 if (DEBUGLEVEL_CLASS == &debug_all_class_hack) {
231 return NULL;
232 }
233
234 list = SMB_CALLOC_ARRAY(char *, debug_num_classes + 1);
235 if (!list) {
236 return NULL;
237 }
238
239 /* prepare strings */
240 for (i = 0, dim = 0; i < debug_num_classes; i++) {
241 int l = asprintf(&list[i],
242 "%s:%d ",
243 classname_table[i],
244 DEBUGLEVEL_CLASS_ISSET[i]?DEBUGLEVEL_CLASS[i]:DEBUGLEVEL);
245 if (l < 0 || l > MAX_CLASS_NAME_SIZE) {
246 err = True;
247 goto done;
248 }
249 dim += l;
250 }
251
252 /* create single string list - add space for newline */
253 b = buf = (char *)SMB_MALLOC(dim+1);
254 if (!buf) {
255 err = True;
256 goto done;
257 }
258 for (i = 0; i < debug_num_classes; i++) {
259 int l = strlen(list[i]);
260 strncpy(b, list[i], l);
261 b = b + l;
262 }
263 b[-1] = '\n'; /* replace last space with newline */
264 b[0] = '\0'; /* null terminate string */
265
266done:
267 /* free strings list */
268 for (i = 0; i < debug_num_classes; i++) {
269 SAFE_FREE(list[i]);
270 }
271 SAFE_FREE(list);
272
273 if (err) {
274 return NULL;
275 } else {
276 return buf;
277 }
278}
279
280/****************************************************************************
281 Utility access to debug class names's.
282****************************************************************************/
283
284const char *debug_classname_from_index(int ndx)
285{
286 if (ndx < 0 || ndx >= debug_num_classes)
287 return NULL;
288 else
289 return classname_table[ndx];
290}
291
292/****************************************************************************
293 Utility to translate names to debug class index's (internal version).
294****************************************************************************/
295
296static int debug_lookup_classname_int(const char* classname)
297{
298 int i;
299
300 if (!classname) return -1;
301
302 for (i=0; i < debug_num_classes; i++) {
303 if (strcmp(classname, classname_table[i])==0)
304 return i;
305 }
306 return -1;
307}
308
309/****************************************************************************
310 Add a new debug class to the system.
311****************************************************************************/
312
313int debug_add_class(const char *classname)
314{
315 int ndx;
316 void *new_ptr;
317
318 if (!classname)
319 return -1;
320
321 /* check the init has yet been called */
322 debug_init();
323
324 ndx = debug_lookup_classname_int(classname);
325 if (ndx >= 0)
326 return ndx;
327 ndx = debug_num_classes;
328
329 new_ptr = DEBUGLEVEL_CLASS;
330 if (DEBUGLEVEL_CLASS == &debug_all_class_hack) {
331 /* Initial loading... */
332 new_ptr = NULL;
333 }
334 new_ptr = SMB_REALLOC_ARRAY(new_ptr, int, debug_num_classes + 1);
335 if (!new_ptr)
336 return -1;
337 DEBUGLEVEL_CLASS = (int *)new_ptr;
338 DEBUGLEVEL_CLASS[ndx] = 0;
339
340 /* debug_level is the pointer used for the DEBUGLEVEL-thingy */
341 if (ndx==0) {
342 /* Transfer the initial level from debug_all_class_hack */
343 DEBUGLEVEL_CLASS[ndx] = DEBUGLEVEL;
344 }
345 debug_level = DEBUGLEVEL_CLASS;
346
347 new_ptr = DEBUGLEVEL_CLASS_ISSET;
348 if (new_ptr == &debug_all_class_isset_hack) {
349 new_ptr = NULL;
350 }
351 new_ptr = SMB_REALLOC_ARRAY(new_ptr, bool, debug_num_classes + 1);
352 if (!new_ptr)
353 return -1;
354 DEBUGLEVEL_CLASS_ISSET = (bool *)new_ptr;
355 DEBUGLEVEL_CLASS_ISSET[ndx] = False;
356
357 new_ptr = SMB_REALLOC_ARRAY(classname_table, char *, debug_num_classes + 1);
358 if (!new_ptr)
359 return -1;
360 classname_table = (char **)new_ptr;
361
362 classname_table[ndx] = SMB_STRDUP(classname);
363 if (! classname_table[ndx])
364 return -1;
365
366 debug_num_classes++;
367
368 return ndx;
369}
370
371/****************************************************************************
372 Utility to translate names to debug class index's (public version).
373****************************************************************************/
374
375int debug_lookup_classname(const char *classname)
376{
377 int ndx;
378
379 if (!classname || !*classname)
380 return -1;
381
382 ndx = debug_lookup_classname_int(classname);
383
384 if (ndx != -1)
385 return ndx;
386
387 if (debug_warn_unknown_class) {
388 DEBUG(0, ("debug_lookup_classname(%s): Unknown class\n",
389 classname));
390 }
391 if (debug_auto_add_unknown_class) {
392 return debug_add_class(classname);
393 }
394 return -1;
395}
396
397/****************************************************************************
398 Dump the current registered debug levels.
399****************************************************************************/
400
401static void debug_dump_status(int level)
402{
403 int q;
404
405 DEBUG(level, ("INFO: Current debug levels:\n"));
406 for (q = 0; q < debug_num_classes; q++) {
407 DEBUGADD(level, (" %s: %s/%d\n",
408 classname_table[q],
409 (DEBUGLEVEL_CLASS_ISSET[q]
410 ? "True" : "False"),
411 DEBUGLEVEL_CLASS[q]));
412 }
413}
414
415/****************************************************************************
416 parse the debug levels from smbcontrol. Example debug level parameter:
417 printdrivers:7
418****************************************************************************/
419
420static bool debug_parse_params(char **params)
421{
422 int i, ndx;
423 char *class_name;
424 char *class_level;
425
426 if (!params)
427 return False;
428
429 /* Allow DBGC_ALL to be specified w/o requiring its class name e.g."10"
430 * v.s. "all:10", this is the traditional way to set DEBUGLEVEL
431 */
432 if (isdigit((int)params[0][0])) {
433 DEBUGLEVEL_CLASS[DBGC_ALL] = atoi(params[0]);
434 DEBUGLEVEL_CLASS_ISSET[DBGC_ALL] = True;
435 i = 1; /* start processing at the next params */
436 } else {
437 i = 0; /* DBGC_ALL not specified OR class name was included */
438 }
439
440 /* Fill in new debug class levels */
441 for (; i < debug_num_classes && params[i]; i++) {
442 char *saveptr;
443 if ((class_name = strtok_r(params[i],":", &saveptr)) &&
444 (class_level = strtok_r(NULL, "\0", &saveptr)) &&
445 ((ndx = debug_lookup_classname(class_name)) != -1)) {
446 DEBUGLEVEL_CLASS[ndx] = atoi(class_level);
447 DEBUGLEVEL_CLASS_ISSET[ndx] = True;
448 } else {
449 DEBUG(0,("debug_parse_params: unrecognized debug class name or format [%s]\n", params[i]));
450 return False;
451 }
452 }
453
454 return True;
455}
456
457/****************************************************************************
458 Parse the debug levels from smb.conf. Example debug level string:
459 3 tdb:5 printdrivers:7
460 Note: the 1st param has no "name:" preceeding it.
461****************************************************************************/
462
463bool debug_parse_levels(const char *params_str)
464{
465 char **params;
466
467 /* Just in case */
468 debug_init();
469
470 if (AllowDebugChange == False)
471 return True;
472
473 params = str_list_make_v3(talloc_tos(), params_str, NULL);
474
475 if (debug_parse_params(params)) {
476 debug_dump_status(5);
477 TALLOC_FREE(params);
478 return True;
479 } else {
480 TALLOC_FREE(params);
481 return False;
482 }
483}
484
485/****************************************************************************
486 Receive a "set debug level" message.
487****************************************************************************/
488
489void debug_message(struct messaging_context *msg_ctx,
490 void *private_data,
491 uint32_t msg_type,
492 struct server_id src,
493 DATA_BLOB *data)
494{
495 const char *params_str = (const char *)data->data;
496
497 /* Check, it's a proper string! */
498 if (params_str[(data->length)-1] != '\0') {
499 DEBUG(1, ("Invalid debug message from pid %u to pid %u\n",
500 (unsigned int)procid_to_pid(&src),
501 (unsigned int)getpid()));
502 return;
503 }
504
505 DEBUG(3, ("INFO: Remote set of debug to `%s' (pid %u from pid %u)\n",
506 params_str, (unsigned int)getpid(),
507 (unsigned int)procid_to_pid(&src)));
508
509 debug_parse_levels(params_str);
510}
511
512/****************************************************************************
513 Return current debug level.
514****************************************************************************/
515
516static void debuglevel_message(struct messaging_context *msg_ctx,
517 void *private_data,
518 uint32_t msg_type,
519 struct server_id src,
520 DATA_BLOB *data)
521{
522 char *message = debug_list_class_names_and_levels();
523
524 if (!message) {
525 DEBUG(0,("debuglevel_message - debug_list_class_names_and_levels returned NULL\n"));
526 return;
527 }
528
529 DEBUG(1,("INFO: Received REQ_DEBUGLEVEL message from PID %s\n",
530 procid_str_static(&src)));
531 messaging_send_buf(msg_ctx, src, MSG_DEBUGLEVEL,
532 (uint8 *)message, strlen(message) + 1);
533
534 SAFE_FREE(message);
535}
536
537/****************************************************************************
538Init debugging (one time stuff)
539****************************************************************************/
540
541void debug_init(void)
542{
543 const char **p;
544
545 if (initialized)
546 return;
547
548 initialized = true;
549
550 for(p = default_classname_table; *p; p++) {
551 debug_add_class(*p);
552 }
553 format_bufr = (char *)SMB_MALLOC(FORMAT_BUFR_SIZE);
554 if (!format_bufr) {
555 smb_panic("debug_init: unable to create buffer");
556 }
557}
558
559void debug_register_msgs(struct messaging_context *msg_ctx)
560{
561 messaging_register(msg_ctx, NULL, MSG_DEBUG, debug_message);
562 messaging_register(msg_ctx, NULL, MSG_REQ_DEBUGLEVEL,
563 debuglevel_message);
564}
565
566/***************************************************************************
567 Get ready for syslog stuff
568**************************************************************************/
569
570void setup_logging(const char *pname, bool interactive)
571{
572 debug_init();
573
574 /* reset to allow multiple setup calls, going from interactive to
575 non-interactive */
576 stdout_logging = False;
577 if (dbf) {
578 x_fflush(dbf);
579 if (dbf != x_stdout) {
580 (void) x_fclose(dbf);
581 }
582 }
583
584 dbf = NULL;
585
586 if (interactive) {
587 stdout_logging = True;
588 dbf = x_stdout;
589 x_setbuf( x_stdout, NULL );
590 }
591#ifdef WITH_SYSLOG
592 else {
593 const char *p = strrchr_m( pname,'/' );
594 if (p)
595 pname = p + 1;
596#ifdef LOG_DAEMON
597 openlog( pname, LOG_PID, SYSLOG_FACILITY );
598#else
599 /* for old systems that have no facility codes. */
600 openlog( pname, LOG_PID );
601#endif
602 }
603#endif
604}
605
606/**
607 Just run logging to stdout for this program
608*/
609_PUBLIC_ void setup_logging_stdout(void)
610{
611 setup_logging(NULL, True);
612}
613
614
615/***************************************************************************
616 Set the logfile name.
617**************************************************************************/
618
619void debug_set_logfile(const char *name)
620{
621 SAFE_FREE(debugf);
622 debugf = SMB_STRDUP(name);
623}
624
625/**************************************************************************
626 reopen the log files
627 note that we now do this unconditionally
628 We attempt to open the new debug fp before closing the old. This means
629 if we run out of fd's we just keep using the old fd rather than aborting.
630 Fix from dgibson@linuxcare.com.
631**************************************************************************/
632
633bool reopen_logs( void )
634{
635 char *fname = NULL;
636 mode_t oldumask;
637 XFILE *new_dbf = NULL;
638 XFILE *old_dbf = NULL;
639 bool ret = True;
640
641 if (stdout_logging)
642 return True;
643
644 oldumask = umask( 022 );
645
646 fname = debugf;
647 if (!fname) {
648 return false;
649 }
650 debugf = NULL;
651
652 if (lp_loaded()) {
653 char *logfname;
654
655 logfname = lp_logfile();
656 if (*logfname) {
657 SAFE_FREE(fname);
658 fname = SMB_STRDUP(logfname);
659 if (!fname) {
660 return false;
661 }
662 }
663 }
664
665 debugf = fname;
666 new_dbf = x_fopen( debugf, O_WRONLY|O_APPEND|O_CREAT, 0644);
667
668 if (!new_dbf) {
669 log_overflow = True;
670 DEBUG(0, ("Unable to open new log file %s: %s\n", debugf, strerror(errno)));
671 log_overflow = False;
672 if (dbf)
673 x_fflush(dbf);
674 ret = False;
675 } else {
676 x_setbuf(new_dbf, NULL);
677 old_dbf = dbf;
678 dbf = new_dbf;
679 if (old_dbf)
680 (void) x_fclose(old_dbf);
681 }
682
683 /* Fix from klausr@ITAP.Physik.Uni-Stuttgart.De
684 * to fix problem where smbd's that generate less
685 * than 100 messages keep growing the log.
686 */
687 force_check_log_size();
688 (void)umask(oldumask);
689
690 /* Take over stderr to catch output into logs */
691 if (dbf && dup2(x_fileno(dbf), 2) == -1) {
692 close_low_fds(True); /* Close stderr too, if dup2 can't point it
693 at the logfile */
694 }
695
696 return ret;
697}
698
699/**************************************************************************
700 Force a check of the log size.
701 ***************************************************************************/
702
703void force_check_log_size( void )
704{
705 debug_count = 100;
706}
707
708/***************************************************************************
709 Check to see if there is any need to check if the logfile has grown too big.
710**************************************************************************/
711
712bool need_to_check_log_size( void )
713{
714 int maxlog;
715
716 if( debug_count < 100 )
717 return( False );
718
719 maxlog = lp_max_log_size() * 1024;
720 if( !dbf || maxlog <= 0 ) {
721 debug_count = 0;
722 return(False);
723 }
724 return( True );
725}
726
727/**************************************************************************
728 Check to see if the log has grown to be too big.
729 **************************************************************************/
730
731void check_log_size( void )
732{
733 int maxlog;
734 SMB_STRUCT_STAT st;
735
736 /*
737 * We need to be root to check/change log-file, skip this and let the main
738 * loop check do a new check as root.
739 */
740
741 if( geteuid() != 0 )
742 return;
743
744 if(log_overflow || !need_to_check_log_size() )
745 return;
746
747 maxlog = lp_max_log_size() * 1024;
748
749 if(sys_fstat(x_fileno(dbf), &st, false) == 0
750 && st.st_ex_size > maxlog ) {
751 (void)reopen_logs();
752 if( dbf && get_file_size( debugf ) > maxlog ) {
753 char *name = NULL;
754
755 if (asprintf(&name, "%s.old", debugf ) < 0) {
756 return;
757 }
758 (void)rename(debugf, name);
759
760 if (!reopen_logs()) {
761 /* We failed to reopen a log - continue using the old name. */
762 (void)rename(name, debugf);
763 }
764 SAFE_FREE(name);
765 }
766 }
767
768 /*
769 * Here's where we need to panic if dbf == NULL..
770 */
771
772 if(dbf == NULL) {
773 /* This code should only be reached in very strange
774 * circumstances. If we merely fail to open the new log we
775 * should stick with the old one. ergo this should only be
776 * reached when opening the logs for the first time: at
777 * startup or when the log level is increased from zero.
778 * -dwg 6 June 2000
779 */
780 dbf = x_fopen( "/dev/console", O_WRONLY, 0);
781 if(dbf) {
782 DEBUG(0,("check_log_size: open of debug file %s failed - using console.\n",
783 debugf ));
784 } else {
785 /*
786 * We cannot continue without a debug file handle.
787 */
788 abort();
789 }
790 }
791 debug_count = 0;
792}
793
794/*************************************************************************
795 Write an debug message on the debugfile.
796 This is called by dbghdr() and format_debug_text().
797************************************************************************/
798
799 int Debug1( const char *format_str, ... )
800{
801 va_list ap;
802 int old_errno = errno;
803
804 debug_count++;
805
806 if( stdout_logging ) {
807 va_start( ap, format_str );
808 if(dbf)
809 (void)x_vfprintf( dbf, format_str, ap );
810 va_end( ap );
811 errno = old_errno;
812 goto done;
813 }
814
815 /* prevent recursion by checking if reopen_logs() has temporaily
816 set the debugf string to NULL */
817 if( debugf == NULL)
818 goto done;
819
820#ifdef WITH_SYSLOG
821 if( !lp_syslog_only() )
822#endif
823 {
824 if( !dbf ) {
825 mode_t oldumask = umask( 022 );
826
827 dbf = x_fopen( debugf, O_WRONLY|O_APPEND|O_CREAT, 0644 );
828 (void)umask( oldumask );
829 if( dbf ) {
830 x_setbuf( dbf, NULL );
831 } else {
832 errno = old_errno;
833 goto done;
834 }
835 }
836 }
837
838#ifdef WITH_SYSLOG
839 if( syslog_level < lp_syslog() ) {
840 /* map debug levels to syslog() priorities
841 * note that not all DEBUG(0, ...) calls are
842 * necessarily errors */
843 static const int priority_map[4] = {
844 LOG_ERR, /* 0 */
845 LOG_WARNING, /* 1 */
846 LOG_NOTICE, /* 2 */
847 LOG_INFO, /* 3 */
848 };
849 int priority;
850 char *msgbuf = NULL;
851 int ret;
852
853 if( syslog_level >= ARRAY_SIZE(priority_map) || syslog_level < 0)
854 priority = LOG_DEBUG;
855 else
856 priority = priority_map[syslog_level];
857
858 /*
859 * Specify the facility to interoperate with other syslog
860 * callers (vfs_full_audit for example).
861 */
862 priority |= SYSLOG_FACILITY;
863
864 va_start(ap, format_str);
865 ret = vasprintf(&msgbuf, format_str, ap);
866 va_end(ap);
867
868 if (ret != -1) {
869 syslog(priority, "%s", msgbuf);
870 }
871 SAFE_FREE(msgbuf);
872 }
873#endif
874
875 check_log_size();
876
877#ifdef WITH_SYSLOG
878 if( !lp_syslog_only() )
879#endif
880 {
881 va_start( ap, format_str );
882 if(dbf)
883 (void)x_vfprintf( dbf, format_str, ap );
884 va_end( ap );
885 if(dbf)
886 (void)x_fflush( dbf );
887 }
888
889 done:
890 errno = old_errno;
891
892 return( 0 );
893}
894
895
896/**************************************************************************
897 Print the buffer content via Debug1(), then reset the buffer.
898 Input: none
899 Output: none
900****************************************************************************/
901
902static void bufr_print( void )
903{
904 format_bufr[format_pos] = '\0';
905 (void)Debug1( "%s", format_bufr );
906 format_pos = 0;
907}
908
909/***************************************************************************
910 Format the debug message text.
911
912 Input: msg - Text to be added to the "current" debug message text.
913
914 Output: none.
915
916 Notes: The purpose of this is two-fold. First, each call to syslog()
917 (used by Debug1(), see above) generates a new line of syslog
918 output. This is fixed by storing the partial lines until the
919 newline character is encountered. Second, printing the debug
920 message lines when a newline is encountered allows us to add
921 spaces, thus indenting the body of the message and making it
922 more readable.
923**************************************************************************/
924
925static void format_debug_text( const char *msg )
926{
927 size_t i;
928 bool timestamp = (!stdout_logging && (lp_timestamp_logs() || !(lp_loaded())));
929
930 if (!format_bufr) {
931 debug_init();
932 }
933
934 for( i = 0; msg[i]; i++ ) {
935 /* Indent two spaces at each new line. */
936 if(timestamp && 0 == format_pos) {
937 format_bufr[0] = format_bufr[1] = ' ';
938 format_pos = 2;
939 }
940
941 /* If there's room, copy the character to the format buffer. */
942 if( format_pos < FORMAT_BUFR_MAX )
943 format_bufr[format_pos++] = msg[i];
944
945 /* If a newline is encountered, print & restart. */
946 if( '\n' == msg[i] )
947 bufr_print();
948
949 /* If the buffer is full dump it out, reset it, and put out a line
950 * continuation indicator.
951 */
952 if( format_pos >= FORMAT_BUFR_MAX ) {
953 bufr_print();
954 (void)Debug1( " +>\n" );
955 }
956 }
957
958 /* Just to be safe... */
959 format_bufr[format_pos] = '\0';
960}
961
962/***************************************************************************
963 Flush debug output, including the format buffer content.
964
965 Input: none
966 Output: none
967***************************************************************************/
968
969void dbgflush( void )
970{
971 bufr_print();
972 if(dbf)
973 (void)x_fflush( dbf );
974}
975
976/***************************************************************************
977 Print a Debug Header.
978
979 Input: level - Debug level of the message (not the system-wide debug
980 level. )
981 cls - Debuglevel class of the calling module.
982 file - Pointer to a string containing the name of the file
983 from which this function was called, or an empty string
984 if the __FILE__ macro is not implemented.
985 func - Pointer to a string containing the name of the function
986 from which this function was called, or an empty string
987 if the __FUNCTION__ macro is not implemented.
988 line - line number of the call to dbghdr, assuming __LINE__
989 works.
990
991 Output: Always True. This makes it easy to fudge a call to dbghdr()
992 in a macro, since the function can be called as part of a test.
993 Eg: ( (level <= DEBUGLEVEL) && (dbghdr(level,"",line)) )
994
995 Notes: This function takes care of setting syslog_level.
996
997****************************************************************************/
998
999bool dbghdrclass(int level, int cls, const char *location, const char *func)
1000{
1001 /* Ensure we don't lose any real errno value. */
1002 int old_errno = errno;
1003
1004 if( format_pos ) {
1005 /* This is a fudge. If there is stuff sitting in the format_bufr, then
1006 * the *right* thing to do is to call
1007 * format_debug_text( "\n" );
1008 * to write the remainder, and then proceed with the new header.
1009 * Unfortunately, there are several places in the code at which
1010 * the DEBUG() macro is used to build partial lines. That in mind,
1011 * we'll work under the assumption that an incomplete line indicates
1012 * that a new header is *not* desired.
1013 */
1014 return( True );
1015 }
1016
1017#ifdef WITH_SYSLOG
1018 /* Set syslog_level. */
1019 syslog_level = level;
1020#endif
1021
1022 /* Don't print a header if we're logging to stdout. */
1023 if( stdout_logging )
1024 return( True );
1025
1026 /* Print the header if timestamps are turned on. If parameters are
1027 * not yet loaded, then default to timestamps on.
1028 */
1029 if( lp_timestamp_logs() || lp_debug_prefix_timestamp() || !(lp_loaded()) ) {
1030 char header_str[200];
1031
1032 header_str[0] = '\0';
1033
1034 if( lp_debug_pid())
1035 slprintf(header_str,sizeof(header_str)-1,", pid=%u",(unsigned int)sys_getpid());
1036
1037 if( lp_debug_uid()) {
1038 size_t hs_len = strlen(header_str);
1039 slprintf(header_str + hs_len,
1040 sizeof(header_str) - 1 - hs_len,
1041 ", effective(%u, %u), real(%u, %u)",
1042 (unsigned int)geteuid(), (unsigned int)getegid(),
1043 (unsigned int)getuid(), (unsigned int)getgid());
1044 }
1045
1046 if (lp_debug_class() && (cls != DBGC_ALL)) {
1047 size_t hs_len = strlen(header_str);
1048 slprintf(header_str + hs_len,
1049 sizeof(header_str) -1 - hs_len,
1050 ", class=%s",
1051 default_classname_table[cls]);
1052 }
1053
1054 /* Print it all out at once to prevent split syslog output. */
1055 if( lp_debug_prefix_timestamp() ) {
1056 (void)Debug1( "[%s, %2d%s] ",
1057 current_timestring(talloc_tos(),
1058 lp_debug_hires_timestamp()),
1059 level, header_str);
1060 } else {
1061 (void)Debug1( "[%s, %2d%s] %s(%s)\n",
1062 current_timestring(talloc_tos(),
1063 lp_debug_hires_timestamp()),
1064 level, header_str, location, func );
1065 }
1066 }
1067
1068 errno = old_errno;
1069 return( True );
1070}
1071
1072bool dbghdr(int level, const char *location, const char *func)
1073{
1074 /* For compatibility with Samba 4, which doesn't have debug classes */
1075 return dbghdrclass(level, 0, location, func);
1076}
1077
1078/***************************************************************************
1079 Add text to the body of the "current" debug message via the format buffer.
1080
1081 Input: format_str - Format string, as used in printf(), et. al.
1082 ... - Variable argument list.
1083
1084 ..or.. va_alist - Old style variable parameter list starting point.
1085
1086 Output: Always True. See dbghdr() for more info, though this is not
1087 likely to be used in the same way.
1088
1089***************************************************************************/
1090
1091 bool dbgtext( const char *format_str, ... )
1092{
1093 va_list ap;
1094 char *msgbuf = NULL;
1095 bool ret = true;
1096 int res;
1097
1098 va_start(ap, format_str);
1099 res = vasprintf(&msgbuf, format_str, ap);
1100 va_end(ap);
1101
1102 if (res != -1) {
1103 format_debug_text(msgbuf);
1104 } else {
1105 ret = false;
1106 }
1107 SAFE_FREE(msgbuf);
1108 return ret;
1109}
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