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
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 2 of the License, or
11 (at your option) any later version.
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.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 /* -------------------------------------------------------------------------- **
28 * FORMAT_BUFR_MAX - Index of the last byte of the format buffer;
29 * format_bufr[FORMAT_BUFR_MAX] should always be reserved
30 * for a terminating null byte.
33 #define FORMAT_BUFR_MAX ( sizeof( format_bufr ) - 1 )
35 /* -------------------------------------------------------------------------- **
36 * This module implements Samba's debugging utility.
38 * The syntax of a debugging log file is represented as:
40 * <debugfile> :== { <debugmsg> }
42 * <debugmsg> :== <debughdr> '\n' <debugtext>
44 * <debughdr> :== '[' TIME ',' LEVEL ']' [ [FILENAME ':'] [FUNCTION '()'] ]
46 * <debugtext> :== { <debugline> }
48 * <debugline> :== TEXT '\n'
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.
56 * Basically, what that all means is:
58 * - A debugging log file is made up of debug messages.
60 * - Each debug message is made up of a header and text. The header is
61 * separated from the text by a newline.
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.
68 * - The message text is made up of zero or more lines, each terminated by
72 /* -------------------------------------------------------------------------- **
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.
83 BOOL debug_warn_unknown_class = True;
84 BOOL debug_auto_add_unknown_class = True;
85 BOOL AllowDebugChange = True;
88 used to check if the user specified a
89 logfile on the command line
91 BOOL override_logfile;
95 * This is to allow assignment to DEBUGLEVEL before the debug
96 * system has been initialised.
98 static int debug_all_class_hack = 1;
99 static BOOL debug_all_class_isset_hack = True;
101 static int debug_num_classes = 0;
102 int *DEBUGLEVEL_CLASS = &debug_all_class_hack;
103 BOOL *DEBUGLEVEL_CLASS_ISSET = &debug_all_class_isset_hack;
105 /* DEBUGLEVEL is #defined to *debug_level */
106 int DEBUGLEVEL = &debug_all_class_hack;
109 /* -------------------------------------------------------------------------- **
110 * Internal variables.
112 * stdout_logging - Default False, if set to True then dbf will be set to
113 * stdout and debug output will go to dbf only, and not
114 * to syslog. Set in setup_logging() and read in Debug1().
116 * debug_count - Number of debug messages that have been output.
117 * Used to check log size.
119 * syslog_level - Internal copy of the message debug level. Written by
120 * dbghdr() and read by Debug1().
122 * format_bufr - Used to format debug messages. The dbgtext() function
123 * prints debug messages to a string, and then passes the
124 * string to format_debug_text(), which uses format_bufr
125 * to build the formatted output.
127 * format_pos - Marks the first free byte of the format_bufr.
130 * log_overflow - When this variable is True, never attempt to check the
131 * size of the log. This is a hack, so that we can write
132 * a message using DEBUG, from open_logs() when we
133 * are unable to open a new log file for some reason.
136 static BOOL stdout_logging = False;
137 static int debug_count = 0;
139 static int syslog_level = 0;
141 static pstring format_bufr = { '\0' };
142 static size_t format_pos = 0;
143 static BOOL log_overflow = False;
146 * Define all the debug class selection names here. Names *MUST NOT* contain
147 * white space. There must be one name for each DBGC_<class name>, and they
148 * must be in the table in the order of DBGC_<class name>..
150 static const char *default_classname_table[] = {
151 "all", /* DBGC_ALL; index refs traditional DEBUGLEVEL */
152 "tdb", /* DBGC_TDB */
153 "printdrivers", /* DBGC_PRINTDRIVERS */
154 "lanman", /* DBGC_LANMAN */
155 "smb", /* DBGC_SMB */
156 "rpc_parse", /* DBGC_RPC_PARSE */
157 "rpc_srv", /* DBGC_RPC_SRV */
158 "rpc_cli", /* DBGC_RPC_CLI */
159 "passdb", /* DBGC_PASSDB */
160 "sam", /* DBGC_SAM */
161 "auth", /* DBGC_AUTH */
162 "winbind", /* DBGC_WINBIND */
163 "vfs", /* DBGC_VFS */
164 "idmap", /* DBGC_IDMAP */
165 "quota", /* DBGC_QUOTA */
166 "acls", /* DBGC_ACLS */
167 "locking", /* DBGC_LOCKING */
168 "msdfs", /* DBGC_MSDFS */
169 "dmapi", /* DBGC_DMAPI */
173 static char **classname_table = NULL;
176 /* -------------------------------------------------------------------------- **
180 /***************************************************************************
181 Free memory pointed to by global pointers.
182 ****************************************************************************/
184 void gfree_debugsyms(void)
188 if ( classname_table ) {
189 for ( i = 0; i < debug_num_classes; i++ ) {
190 SAFE_FREE( classname_table[i] );
192 SAFE_FREE( classname_table );
195 if ( DEBUGLEVEL_CLASS != &debug_all_class_hack )
196 SAFE_FREE( DEBUGLEVEL_CLASS );
198 if ( DEBUGLEVEL_CLASS_ISSET != &debug_all_class_isset_hack )
199 SAFE_FREE( DEBUGLEVEL_CLASS_ISSET );
202 /****************************************************************************
203 utility lists registered debug class names's
204 ****************************************************************************/
206 #define MAX_CLASS_NAME_SIZE 1024
208 static char *debug_list_class_names_and_levels(void)
216 if (DEBUGLEVEL_CLASS == &debug_all_class_hack) {
220 list = SMB_CALLOC_ARRAY(char *, debug_num_classes + 1);
225 /* prepare strings */
226 for (i = 0, dim = 0; i < debug_num_classes; i++) {
227 int l = asprintf(&list[i],
230 DEBUGLEVEL_CLASS_ISSET[i]?DEBUGLEVEL_CLASS[i]:DEBUGLEVEL);
231 if (l < 0 || l > MAX_CLASS_NAME_SIZE) {
238 /* create single string list - add space for newline */
239 b = buf = SMB_MALLOC(dim+1);
244 for (i = 0; i < debug_num_classes; i++) {
245 int l = strlen(list[i]);
246 strncpy(b, list[i], l);
249 b[-1] = '\n'; /* replace last space with newline */
250 b[0] = '\0'; /* null terminate string */
253 /* free strings list */
254 for (i = 0; i < debug_num_classes; i++) {
266 /****************************************************************************
267 Utility access to debug class names's.
268 ****************************************************************************/
270 const char *debug_classname_from_index(int ndx)
272 if (ndx < 0 || ndx >= debug_num_classes)
275 return classname_table[ndx];
278 /****************************************************************************
279 Utility to translate names to debug class index's (internal version).
280 ****************************************************************************/
282 static int debug_lookup_classname_int(const char* classname)
286 if (!classname) return -1;
288 for (i=0; i < debug_num_classes; i++) {
289 if (strcmp(classname, classname_table[i])==0)
295 /****************************************************************************
296 Add a new debug class to the system.
297 ****************************************************************************/
299 int debug_add_class(const char *classname)
307 /* check the init has yet been called */
310 ndx = debug_lookup_classname_int(classname);
313 ndx = debug_num_classes;
315 new_ptr = DEBUGLEVEL_CLASS;
316 if (DEBUGLEVEL_CLASS == &debug_all_class_hack) {
317 /* Initial loading... */
320 new_ptr = SMB_REALLOC_ARRAY(new_ptr, int, debug_num_classes + 1);
323 DEBUGLEVEL_CLASS = new_ptr;
324 DEBUGLEVEL_CLASS[ndx] = 0;
326 /* debug_level is the pointer used for the DEBUGLEVEL-thingy */
328 /* Transfer the initial level from debug_all_class_hack */
329 DEBUGLEVEL_CLASS[ndx] = DEBUGLEVEL;
331 debug_level = DEBUGLEVEL_CLASS;
333 new_ptr = DEBUGLEVEL_CLASS_ISSET;
334 if (new_ptr == &debug_all_class_isset_hack) {
337 new_ptr = SMB_REALLOC_ARRAY(new_ptr, BOOL, debug_num_classes + 1);
340 DEBUGLEVEL_CLASS_ISSET = new_ptr;
341 DEBUGLEVEL_CLASS_ISSET[ndx] = False;
343 new_ptr = SMB_REALLOC_ARRAY(classname_table, char *, debug_num_classes + 1);
346 classname_table = new_ptr;
348 classname_table[ndx] = SMB_STRDUP(classname);
349 if (! classname_table[ndx])
357 /****************************************************************************
358 Utility to translate names to debug class index's (public version).
359 ****************************************************************************/
361 int debug_lookup_classname(const char *classname)
365 if (!classname || !*classname)
368 ndx = debug_lookup_classname_int(classname);
373 if (debug_warn_unknown_class) {
374 DEBUG(0, ("debug_lookup_classname(%s): Unknown class\n",
377 if (debug_auto_add_unknown_class) {
378 return debug_add_class(classname);
383 /****************************************************************************
384 Dump the current registered debug levels.
385 ****************************************************************************/
387 static void debug_dump_status(int level)
391 DEBUG(level, ("INFO: Current debug levels:\n"));
392 for (q = 0; q < debug_num_classes; q++) {
393 DEBUGADD(level, (" %s: %s/%d\n",
395 (DEBUGLEVEL_CLASS_ISSET[q]
397 DEBUGLEVEL_CLASS[q]));
401 /****************************************************************************
402 parse the debug levels from smbcontrol. Example debug level parameter:
404 ****************************************************************************/
406 static BOOL debug_parse_params(char **params)
415 /* Allow DBGC_ALL to be specified w/o requiring its class name e.g."10"
416 * v.s. "all:10", this is the traditional way to set DEBUGLEVEL
418 if (isdigit((int)params[0][0])) {
419 DEBUGLEVEL_CLASS[DBGC_ALL] = atoi(params[0]);
420 DEBUGLEVEL_CLASS_ISSET[DBGC_ALL] = True;
421 i = 1; /* start processing at the next params */
423 i = 0; /* DBGC_ALL not specified OR class name was included */
426 /* Fill in new debug class levels */
427 for (; i < debug_num_classes && params[i]; i++) {
428 if ((class_name=strtok(params[i],":")) &&
429 (class_level=strtok(NULL, "\0")) &&
430 ((ndx = debug_lookup_classname(class_name)) != -1)) {
431 DEBUGLEVEL_CLASS[ndx] = atoi(class_level);
432 DEBUGLEVEL_CLASS_ISSET[ndx] = True;
434 DEBUG(0,("debug_parse_params: unrecognized debug class name or format [%s]\n", params[i]));
442 /****************************************************************************
443 Parse the debug levels from smb.conf. Example debug level string:
444 3 tdb:5 printdrivers:7
445 Note: the 1st param has no "name:" preceeding it.
446 ****************************************************************************/
448 BOOL debug_parse_levels(const char *params_str)
455 if (AllowDebugChange == False)
458 params = str_list_make(params_str, NULL);
460 if (debug_parse_params(params)) {
461 debug_dump_status(5);
462 str_list_free(¶ms);
465 str_list_free(¶ms);
470 /****************************************************************************
471 Receive a "set debug level" message.
472 ****************************************************************************/
474 static void debug_message(int msg_type, struct process_id src,
475 void *buf, size_t len)
477 const char *params_str = buf;
479 /* Check, it's a proper string! */
480 if (params_str[len-1] != '\0') {
481 DEBUG(1, ("Invalid debug message from pid %u to pid %u\n",
482 (unsigned int)procid_to_pid(&src),
483 (unsigned int)getpid()));
487 DEBUG(3, ("INFO: Remote set of debug to `%s' (pid %u from pid %u)\n",
488 params_str, (unsigned int)getpid(),
489 (unsigned int)procid_to_pid(&src)));
491 debug_parse_levels(params_str);
494 /****************************************************************************
495 Send a "set debug level" message.
496 ****************************************************************************/
498 void debug_message_send(pid_t pid, const char *params_str)
502 message_send_pid(pid_to_procid(pid), MSG_DEBUG,
503 params_str, strlen(params_str) + 1,
507 /****************************************************************************
508 Return current debug level.
509 ****************************************************************************/
511 static void debuglevel_message(int msg_type, struct process_id src,
512 void *buf, size_t len)
514 char *message = debug_list_class_names_and_levels();
516 DEBUG(1,("INFO: Received REQ_DEBUGLEVEL message from PID %u\n",
517 (unsigned int)procid_to_pid(&src)));
518 message_send_pid(src, MSG_DEBUGLEVEL, message, strlen(message) + 1, True);
523 /****************************************************************************
524 Init debugging (one time stuff)
525 ****************************************************************************/
527 void debug_init(void)
529 static BOOL initialised = False;
537 message_register(MSG_DEBUG, debug_message);
538 message_register(MSG_REQ_DEBUGLEVEL, debuglevel_message);
540 for(p = default_classname_table; *p; p++) {
545 /***************************************************************************
546 Get ready for syslog stuff
547 **************************************************************************/
549 void setup_logging(const char *pname, BOOL interactive)
553 /* reset to allow multiple setup calls, going from interactive to
555 stdout_logging = False;
558 (void) x_fclose(dbf);
564 stdout_logging = True;
566 x_setbuf( x_stdout, NULL );
570 const char *p = strrchr_m( pname,'/' );
574 openlog( pname, LOG_PID, SYSLOG_FACILITY );
576 /* for old systems that have no facility codes. */
577 openlog( pname, LOG_PID );
583 /**************************************************************************
585 note that we now do this unconditionally
586 We attempt to open the new debug fp before closing the old. This means
587 if we run out of fd's we just keep using the old fd rather than aborting.
588 Fix from dgibson@linuxcare.com.
589 **************************************************************************/
591 BOOL reopen_logs( void )
595 XFILE *new_dbf = NULL;
596 XFILE *old_dbf = NULL;
602 oldumask = umask( 022 );
604 pstrcpy(fname, debugf );
610 logfname = lp_logfile();
612 pstrcpy(fname, logfname);
615 pstrcpy( debugf, fname );
616 new_dbf = x_fopen( debugf, O_WRONLY|O_APPEND|O_CREAT, 0644);
620 DEBUG(0, ("Unable to open new log file %s: %s\n", debugf, strerror(errno)));
621 log_overflow = False;
626 x_setbuf(new_dbf, NULL);
630 (void) x_fclose(old_dbf);
633 /* Fix from klausr@ITAP.Physik.Uni-Stuttgart.De
634 * to fix problem where smbd's that generate less
635 * than 100 messages keep growing the log.
637 force_check_log_size();
638 (void)umask(oldumask);
640 /* Take over stderr to catch ouput into logs */
641 if (dbf && sys_dup2(x_fileno(dbf), 2) == -1) {
642 close_low_fds(True); /* Close stderr too, if dup2 can't point it
649 /**************************************************************************
650 Force a check of the log size.
651 ***************************************************************************/
653 void force_check_log_size( void )
658 /***************************************************************************
659 Check to see if there is any need to check if the logfile has grown too big.
660 **************************************************************************/
662 BOOL need_to_check_log_size( void )
666 if( debug_count < 100 )
669 maxlog = lp_max_log_size() * 1024;
670 if( !dbf || maxlog <= 0 ) {
677 /**************************************************************************
678 Check to see if the log has grown to be too big.
679 **************************************************************************/
681 void check_log_size( void )
687 * We need to be root to check/change log-file, skip this and let the main
688 * loop check do a new check as root.
694 if(log_overflow || !need_to_check_log_size() )
697 maxlog = lp_max_log_size() * 1024;
699 if( sys_fstat( x_fileno( dbf ), &st ) == 0 && st.st_size > maxlog ) {
701 if( dbf && get_file_size( debugf ) > maxlog ) {
704 slprintf( name, sizeof(name)-1, "%s.old", debugf );
705 (void)rename( debugf, name );
707 if (!reopen_logs()) {
708 /* We failed to reopen a log - continue using the old name. */
709 (void)rename(name, debugf);
715 * Here's where we need to panic if dbf == NULL..
719 /* This code should only be reached in very strange
720 * circumstances. If we merely fail to open the new log we
721 * should stick with the old one. ergo this should only be
722 * reached when opening the logs for the first time: at
723 * startup or when the log level is increased from zero.
726 dbf = x_fopen( "/dev/console", O_WRONLY, 0);
728 DEBUG(0,("check_log_size: open of debug file %s failed - using console.\n",
732 * We cannot continue without a debug file handle.
740 /*************************************************************************
741 Write an debug message on the debugfile.
742 This is called by dbghdr() and format_debug_text().
743 ************************************************************************/
745 int Debug1( const char *format_str, ... )
748 int old_errno = errno;
752 if( stdout_logging ) {
753 va_start( ap, format_str );
755 (void)x_vfprintf( dbf, format_str, ap );
761 /* prevent recursion by checking if reopen_logs() has temporaily
762 set the debugf string to "" */
763 if( debugf[0] == '\0')
767 if( !lp_syslog_only() )
771 mode_t oldumask = umask( 022 );
773 dbf = x_fopen( debugf, O_WRONLY|O_APPEND|O_CREAT, 0644 );
774 (void)umask( oldumask );
776 x_setbuf( dbf, NULL );
785 if( syslog_level < lp_syslog() ) {
786 /* map debug levels to syslog() priorities
787 * note that not all DEBUG(0, ...) calls are
788 * necessarily errors */
789 static int priority_map[] = {
798 if( syslog_level >= ( sizeof(priority_map) / sizeof(priority_map[0]) ) || syslog_level < 0)
799 priority = LOG_DEBUG;
801 priority = priority_map[syslog_level];
803 va_start( ap, format_str );
804 vslprintf( msgbuf, sizeof(msgbuf)-1, format_str, ap );
808 syslog( priority, "%s", msgbuf );
815 if( !lp_syslog_only() )
818 va_start( ap, format_str );
820 (void)x_vfprintf( dbf, format_str, ap );
823 (void)x_fflush( dbf );
832 /**************************************************************************
833 Print the buffer content via Debug1(), then reset the buffer.
836 ****************************************************************************/
838 static void bufr_print( void )
840 format_bufr[format_pos] = '\0';
841 (void)Debug1( "%s", format_bufr );
845 /***************************************************************************
846 Format the debug message text.
848 Input: msg - Text to be added to the "current" debug message text.
852 Notes: The purpose of this is two-fold. First, each call to syslog()
853 (used by Debug1(), see above) generates a new line of syslog
854 output. This is fixed by storing the partial lines until the
855 newline character is encountered. Second, printing the debug
856 message lines when a newline is encountered allows us to add
857 spaces, thus indenting the body of the message and making it
859 **************************************************************************/
861 static void format_debug_text( const char *msg )
864 BOOL timestamp = (!stdout_logging && (lp_timestamp_logs() || !(lp_loaded())));
866 for( i = 0; msg[i]; i++ ) {
867 /* Indent two spaces at each new line. */
868 if(timestamp && 0 == format_pos) {
869 format_bufr[0] = format_bufr[1] = ' ';
873 /* If there's room, copy the character to the format buffer. */
874 if( format_pos < FORMAT_BUFR_MAX )
875 format_bufr[format_pos++] = msg[i];
877 /* If a newline is encountered, print & restart. */
881 /* If the buffer is full dump it out, reset it, and put out a line
882 * continuation indicator.
884 if( format_pos >= FORMAT_BUFR_MAX ) {
886 (void)Debug1( " +>\n" );
890 /* Just to be safe... */
891 format_bufr[format_pos] = '\0';
894 /***************************************************************************
895 Flush debug output, including the format buffer content.
899 ***************************************************************************/
901 void dbgflush( void )
905 (void)x_fflush( dbf );
908 /***************************************************************************
909 Print a Debug Header.
911 Input: level - Debug level of the message (not the system-wide debug
913 file - Pointer to a string containing the name of the file
914 from which this function was called, or an empty string
915 if the __FILE__ macro is not implemented.
916 func - Pointer to a string containing the name of the function
917 from which this function was called, or an empty string
918 if the __FUNCTION__ macro is not implemented.
919 line - line number of the call to dbghdr, assuming __LINE__
922 Output: Always True. This makes it easy to fudge a call to dbghdr()
923 in a macro, since the function can be called as part of a test.
924 Eg: ( (level <= DEBUGLEVEL) && (dbghdr(level,"",line)) )
926 Notes: This function takes care of setting syslog_level.
928 ****************************************************************************/
930 BOOL dbghdr( int level, const char *file, const char *func, int line )
932 /* Ensure we don't lose any real errno value. */
933 int old_errno = errno;
936 /* This is a fudge. If there is stuff sitting in the format_bufr, then
937 * the *right* thing to do is to call
938 * format_debug_text( "\n" );
939 * to write the remainder, and then proceed with the new header.
940 * Unfortunately, there are several places in the code at which
941 * the DEBUG() macro is used to build partial lines. That in mind,
942 * we'll work under the assumption that an incomplete line indicates
943 * that a new header is *not* desired.
949 /* Set syslog_level. */
950 syslog_level = level;
953 /* Don't print a header if we're logging to stdout. */
957 /* Print the header if timestamps are turned on. If parameters are
958 * not yet loaded, then default to timestamps on.
960 if( lp_timestamp_logs() || !(lp_loaded()) ) {
961 char header_str[200];
963 header_str[0] = '\0';
966 slprintf(header_str,sizeof(header_str)-1,", pid=%u",(unsigned int)sys_getpid());
968 if( lp_debug_uid()) {
969 size_t hs_len = strlen(header_str);
970 slprintf(header_str + hs_len,
971 sizeof(header_str) - 1 - hs_len,
972 ", effective(%u, %u), real(%u, %u)",
973 (unsigned int)geteuid(), (unsigned int)getegid(),
974 (unsigned int)getuid(), (unsigned int)getgid());
977 /* Print it all out at once to prevent split syslog output. */
978 (void)Debug1( "[%s, %d%s] %s:%s(%d)\n",
979 timestring(lp_debug_hires_timestamp()), level,
980 header_str, file, func, line );
987 /***************************************************************************
988 Add text to the body of the "current" debug message via the format buffer.
990 Input: format_str - Format string, as used in printf(), et. al.
991 ... - Variable argument list.
993 ..or.. va_alist - Old style variable parameter list starting point.
995 Output: Always True. See dbghdr() for more info, though this is not
996 likely to be used in the same way.
998 ***************************************************************************/
1000 BOOL dbgtext( const char *format_str, ... )
1005 va_start( ap, format_str );
1006 vslprintf( msgbuf, sizeof(msgbuf)-1, format_str, ap );
1009 format_debug_text( msgbuf );