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 */
172 static char **classname_table = NULL;
175 /* -------------------------------------------------------------------------- **
180 /****************************************************************************
181 utility lists registered debug class names's
182 ****************************************************************************/
184 #define MAX_CLASS_NAME_SIZE 1024
186 static char *debug_list_class_names_and_levels(void)
194 if (DEBUGLEVEL_CLASS == &debug_all_class_hack) {
198 list = SMB_CALLOC_ARRAY(char *, debug_num_classes + 1);
203 /* prepare strings */
204 for (i = 0, dim = 0; i < debug_num_classes; i++) {
205 int l = asprintf(&list[i],
208 DEBUGLEVEL_CLASS_ISSET[i]?DEBUGLEVEL_CLASS[i]:DEBUGLEVEL);
209 if (l < 0 || l > MAX_CLASS_NAME_SIZE) {
216 /* create single string list - add space for newline */
217 b = buf = SMB_MALLOC(dim+1);
222 for (i = 0; i < debug_num_classes; i++) {
223 int l = strlen(list[i]);
224 strncpy(b, list[i], l);
227 b[-1] = '\n'; /* replace last space with newline */
228 b[0] = '\0'; /* null terminate string */
231 /* free strings list */
232 for (i = 0; i < debug_num_classes; i++) {
244 /****************************************************************************
245 Utility access to debug class names's.
246 ****************************************************************************/
248 const char *debug_classname_from_index(int ndx)
250 if (ndx < 0 || ndx >= debug_num_classes)
253 return classname_table[ndx];
256 /****************************************************************************
257 Utility to translate names to debug class index's (internal version).
258 ****************************************************************************/
260 static int debug_lookup_classname_int(const char* classname)
264 if (!classname) return -1;
266 for (i=0; i < debug_num_classes; i++) {
267 if (strcmp(classname, classname_table[i])==0)
273 /****************************************************************************
274 Add a new debug class to the system.
275 ****************************************************************************/
277 int debug_add_class(const char *classname)
285 /* check the init has yet been called */
288 ndx = debug_lookup_classname_int(classname);
291 ndx = debug_num_classes;
293 new_ptr = DEBUGLEVEL_CLASS;
294 if (DEBUGLEVEL_CLASS == &debug_all_class_hack) {
295 /* Initial loading... */
298 new_ptr = SMB_REALLOC_ARRAY(new_ptr, int, debug_num_classes + 1);
301 DEBUGLEVEL_CLASS = new_ptr;
302 DEBUGLEVEL_CLASS[ndx] = 0;
304 /* debug_level is the pointer used for the DEBUGLEVEL-thingy */
306 /* Transfer the initial level from debug_all_class_hack */
307 DEBUGLEVEL_CLASS[ndx] = DEBUGLEVEL;
309 debug_level = DEBUGLEVEL_CLASS;
311 new_ptr = DEBUGLEVEL_CLASS_ISSET;
312 if (new_ptr == &debug_all_class_isset_hack) {
315 new_ptr = SMB_REALLOC_ARRAY(new_ptr, BOOL, debug_num_classes + 1);
318 DEBUGLEVEL_CLASS_ISSET = new_ptr;
319 DEBUGLEVEL_CLASS_ISSET[ndx] = False;
321 new_ptr = SMB_REALLOC_ARRAY(classname_table, char *, debug_num_classes + 1);
324 classname_table = new_ptr;
326 classname_table[ndx] = SMB_STRDUP(classname);
327 if (! classname_table[ndx])
335 /****************************************************************************
336 Utility to translate names to debug class index's (public version).
337 ****************************************************************************/
339 int debug_lookup_classname(const char *classname)
343 if (!classname || !*classname)
346 ndx = debug_lookup_classname_int(classname);
351 if (debug_warn_unknown_class) {
352 DEBUG(0, ("debug_lookup_classname(%s): Unknown class\n",
355 if (debug_auto_add_unknown_class) {
356 return debug_add_class(classname);
361 /****************************************************************************
362 Dump the current registered debug levels.
363 ****************************************************************************/
365 static void debug_dump_status(int level)
369 DEBUG(level, ("INFO: Current debug levels:\n"));
370 for (q = 0; q < debug_num_classes; q++) {
371 DEBUGADD(level, (" %s: %s/%d\n",
373 (DEBUGLEVEL_CLASS_ISSET[q]
375 DEBUGLEVEL_CLASS[q]));
379 /****************************************************************************
380 parse the debug levels from smbcontrol. Example debug level parameter:
382 ****************************************************************************/
384 static BOOL debug_parse_params(char **params)
393 /* Allow DBGC_ALL to be specified w/o requiring its class name e.g."10"
394 * v.s. "all:10", this is the traditional way to set DEBUGLEVEL
396 if (isdigit((int)params[0][0])) {
397 DEBUGLEVEL_CLASS[DBGC_ALL] = atoi(params[0]);
398 DEBUGLEVEL_CLASS_ISSET[DBGC_ALL] = True;
399 i = 1; /* start processing at the next params */
401 i = 0; /* DBGC_ALL not specified OR class name was included */
404 /* Fill in new debug class levels */
405 for (; i < debug_num_classes && params[i]; i++) {
406 if ((class_name=strtok(params[i],":")) &&
407 (class_level=strtok(NULL, "\0")) &&
408 ((ndx = debug_lookup_classname(class_name)) != -1)) {
409 DEBUGLEVEL_CLASS[ndx] = atoi(class_level);
410 DEBUGLEVEL_CLASS_ISSET[ndx] = True;
412 DEBUG(0,("debug_parse_params: unrecognized debug class name or format [%s]\n", params[i]));
420 /****************************************************************************
421 Parse the debug levels from smb.conf. Example debug level string:
422 3 tdb:5 printdrivers:7
423 Note: the 1st param has no "name:" preceeding it.
424 ****************************************************************************/
426 BOOL debug_parse_levels(const char *params_str)
433 if (AllowDebugChange == False)
436 params = str_list_make(params_str, NULL);
438 if (debug_parse_params(params)) {
439 debug_dump_status(5);
440 str_list_free(¶ms);
443 str_list_free(¶ms);
448 /****************************************************************************
449 Receive a "set debug level" message.
450 ****************************************************************************/
452 static void debug_message(int msg_type, struct process_id src,
453 void *buf, size_t len)
455 const char *params_str = buf;
457 /* Check, it's a proper string! */
458 if (params_str[len-1] != '\0') {
459 DEBUG(1, ("Invalid debug message from pid %u to pid %u\n",
460 (unsigned int)procid_to_pid(&src),
461 (unsigned int)getpid()));
465 DEBUG(3, ("INFO: Remote set of debug to `%s' (pid %u from pid %u)\n",
466 params_str, (unsigned int)getpid(),
467 (unsigned int)procid_to_pid(&src)));
469 debug_parse_levels(params_str);
472 /****************************************************************************
473 Send a "set debug level" message.
474 ****************************************************************************/
476 void debug_message_send(pid_t pid, const char *params_str)
480 message_send_pid(pid_to_procid(pid), MSG_DEBUG,
481 params_str, strlen(params_str) + 1,
485 /****************************************************************************
486 Return current debug level.
487 ****************************************************************************/
489 static void debuglevel_message(int msg_type, struct process_id src,
490 void *buf, size_t len)
492 char *message = debug_list_class_names_and_levels();
494 DEBUG(1,("INFO: Received REQ_DEBUGLEVEL message from PID %u\n",
495 (unsigned int)procid_to_pid(&src)));
496 message_send_pid(src, MSG_DEBUGLEVEL, message, strlen(message) + 1, True);
501 /****************************************************************************
502 Init debugging (one time stuff)
503 ****************************************************************************/
505 void debug_init(void)
507 static BOOL initialised = False;
515 message_register(MSG_DEBUG, debug_message);
516 message_register(MSG_REQ_DEBUGLEVEL, debuglevel_message);
518 for(p = default_classname_table; *p; p++) {
523 /***************************************************************************
524 Get ready for syslog stuff
525 **************************************************************************/
527 void setup_logging(const char *pname, BOOL interactive)
531 /* reset to allow multiple setup calls, going from interactive to
533 stdout_logging = False;
536 (void) x_fclose(dbf);
542 stdout_logging = True;
544 x_setbuf( x_stdout, NULL );
548 const char *p = strrchr_m( pname,'/' );
552 openlog( pname, LOG_PID, SYSLOG_FACILITY );
554 /* for old systems that have no facility codes. */
555 openlog( pname, LOG_PID );
561 /**************************************************************************
563 note that we now do this unconditionally
564 We attempt to open the new debug fp before closing the old. This means
565 if we run out of fd's we just keep using the old fd rather than aborting.
566 Fix from dgibson@linuxcare.com.
567 **************************************************************************/
569 BOOL reopen_logs( void )
573 XFILE *new_dbf = NULL;
574 XFILE *old_dbf = NULL;
580 oldumask = umask( 022 );
582 pstrcpy(fname, debugf );
588 logfname = lp_logfile();
590 pstrcpy(fname, logfname);
593 pstrcpy( debugf, fname );
594 new_dbf = x_fopen( debugf, O_WRONLY|O_APPEND|O_CREAT, 0644);
598 DEBUG(0, ("Unable to open new log file %s: %s\n", debugf, strerror(errno)));
599 log_overflow = False;
604 x_setbuf(new_dbf, NULL);
608 (void) x_fclose(old_dbf);
611 /* Fix from klausr@ITAP.Physik.Uni-Stuttgart.De
612 * to fix problem where smbd's that generate less
613 * than 100 messages keep growing the log.
615 force_check_log_size();
616 (void)umask(oldumask);
618 /* Take over stderr to catch ouput into logs */
619 if (dbf && sys_dup2(x_fileno(dbf), 2) == -1) {
620 close_low_fds(True); /* Close stderr too, if dup2 can't point it
627 /**************************************************************************
628 Force a check of the log size.
629 ***************************************************************************/
631 void force_check_log_size( void )
636 /***************************************************************************
637 Check to see if there is any need to check if the logfile has grown too big.
638 **************************************************************************/
640 BOOL need_to_check_log_size( void )
644 if( debug_count < 100 )
647 maxlog = lp_max_log_size() * 1024;
648 if( !dbf || maxlog <= 0 ) {
655 /**************************************************************************
656 Check to see if the log has grown to be too big.
657 **************************************************************************/
659 void check_log_size( void )
665 * We need to be root to check/change log-file, skip this and let the main
666 * loop check do a new check as root.
672 if(log_overflow || !need_to_check_log_size() )
675 maxlog = lp_max_log_size() * 1024;
677 if( sys_fstat( x_fileno( dbf ), &st ) == 0 && st.st_size > maxlog ) {
679 if( dbf && get_file_size( debugf ) > maxlog ) {
682 slprintf( name, sizeof(name)-1, "%s.old", debugf );
683 (void)rename( debugf, name );
685 if (!reopen_logs()) {
686 /* We failed to reopen a log - continue using the old name. */
687 (void)rename(name, debugf);
693 * Here's where we need to panic if dbf == NULL..
697 /* This code should only be reached in very strange
698 * circumstances. If we merely fail to open the new log we
699 * should stick with the old one. ergo this should only be
700 * reached when opening the logs for the first time: at
701 * startup or when the log level is increased from zero.
704 dbf = x_fopen( "/dev/console", O_WRONLY, 0);
706 DEBUG(0,("check_log_size: open of debug file %s failed - using console.\n",
710 * We cannot continue without a debug file handle.
718 /*************************************************************************
719 Write an debug message on the debugfile.
720 This is called by dbghdr() and format_debug_text().
721 ************************************************************************/
723 int Debug1( const char *format_str, ... )
726 int old_errno = errno;
730 if( stdout_logging ) {
731 va_start( ap, format_str );
733 (void)x_vfprintf( dbf, format_str, ap );
739 /* prevent recursion by checking if reopen_logs() has temporaily
740 set the debugf string to "" */
741 if( debugf[0] == '\0')
745 if( !lp_syslog_only() )
749 mode_t oldumask = umask( 022 );
751 dbf = x_fopen( debugf, O_WRONLY|O_APPEND|O_CREAT, 0644 );
752 (void)umask( oldumask );
754 x_setbuf( dbf, NULL );
763 if( syslog_level < lp_syslog() ) {
764 /* map debug levels to syslog() priorities
765 * note that not all DEBUG(0, ...) calls are
766 * necessarily errors */
767 static int priority_map[] = {
776 if( syslog_level >= ( sizeof(priority_map) / sizeof(priority_map[0]) ) || syslog_level < 0)
777 priority = LOG_DEBUG;
779 priority = priority_map[syslog_level];
781 va_start( ap, format_str );
782 vslprintf( msgbuf, sizeof(msgbuf)-1, format_str, ap );
786 syslog( priority, "%s", msgbuf );
793 if( !lp_syslog_only() )
796 va_start( ap, format_str );
798 (void)x_vfprintf( dbf, format_str, ap );
801 (void)x_fflush( dbf );
810 /**************************************************************************
811 Print the buffer content via Debug1(), then reset the buffer.
814 ****************************************************************************/
816 static void bufr_print( void )
818 format_bufr[format_pos] = '\0';
819 (void)Debug1( "%s", format_bufr );
823 /***************************************************************************
824 Format the debug message text.
826 Input: msg - Text to be added to the "current" debug message text.
830 Notes: The purpose of this is two-fold. First, each call to syslog()
831 (used by Debug1(), see above) generates a new line of syslog
832 output. This is fixed by storing the partial lines until the
833 newline character is encountered. Second, printing the debug
834 message lines when a newline is encountered allows us to add
835 spaces, thus indenting the body of the message and making it
837 **************************************************************************/
839 static void format_debug_text( const char *msg )
842 BOOL timestamp = (!stdout_logging && (lp_timestamp_logs() || !(lp_loaded())));
844 for( i = 0; msg[i]; i++ ) {
845 /* Indent two spaces at each new line. */
846 if(timestamp && 0 == format_pos) {
847 format_bufr[0] = format_bufr[1] = ' ';
851 /* If there's room, copy the character to the format buffer. */
852 if( format_pos < FORMAT_BUFR_MAX )
853 format_bufr[format_pos++] = msg[i];
855 /* If a newline is encountered, print & restart. */
859 /* If the buffer is full dump it out, reset it, and put out a line
860 * continuation indicator.
862 if( format_pos >= FORMAT_BUFR_MAX ) {
864 (void)Debug1( " +>\n" );
868 /* Just to be safe... */
869 format_bufr[format_pos] = '\0';
872 /***************************************************************************
873 Flush debug output, including the format buffer content.
877 ***************************************************************************/
879 void dbgflush( void )
883 (void)x_fflush( dbf );
886 /***************************************************************************
887 Print a Debug Header.
889 Input: level - Debug level of the message (not the system-wide debug
891 file - Pointer to a string containing the name of the file
892 from which this function was called, or an empty string
893 if the __FILE__ macro is not implemented.
894 func - Pointer to a string containing the name of the function
895 from which this function was called, or an empty string
896 if the __FUNCTION__ macro is not implemented.
897 line - line number of the call to dbghdr, assuming __LINE__
900 Output: Always True. This makes it easy to fudge a call to dbghdr()
901 in a macro, since the function can be called as part of a test.
902 Eg: ( (level <= DEBUGLEVEL) && (dbghdr(level,"",line)) )
904 Notes: This function takes care of setting syslog_level.
906 ****************************************************************************/
908 BOOL dbghdr( int level, const char *file, const char *func, int line )
910 /* Ensure we don't lose any real errno value. */
911 int old_errno = errno;
914 /* This is a fudge. If there is stuff sitting in the format_bufr, then
915 * the *right* thing to do is to call
916 * format_debug_text( "\n" );
917 * to write the remainder, and then proceed with the new header.
918 * Unfortunately, there are several places in the code at which
919 * the DEBUG() macro is used to build partial lines. That in mind,
920 * we'll work under the assumption that an incomplete line indicates
921 * that a new header is *not* desired.
927 /* Set syslog_level. */
928 syslog_level = level;
931 /* Don't print a header if we're logging to stdout. */
935 /* Print the header if timestamps are turned on. If parameters are
936 * not yet loaded, then default to timestamps on.
938 if( lp_timestamp_logs() || !(lp_loaded()) ) {
939 char header_str[200];
941 header_str[0] = '\0';
944 slprintf(header_str,sizeof(header_str)-1,", pid=%u",(unsigned int)sys_getpid());
946 if( lp_debug_uid()) {
947 size_t hs_len = strlen(header_str);
948 slprintf(header_str + hs_len,
949 sizeof(header_str) - 1 - hs_len,
950 ", effective(%u, %u), real(%u, %u)",
951 (unsigned int)geteuid(), (unsigned int)getegid(),
952 (unsigned int)getuid(), (unsigned int)getgid());
955 /* Print it all out at once to prevent split syslog output. */
956 (void)Debug1( "[%s, %d%s] %s:%s(%d)\n",
957 timestring(lp_debug_hires_timestamp()), level,
958 header_str, file, func, line );
965 /***************************************************************************
966 Add text to the body of the "current" debug message via the format buffer.
968 Input: format_str - Format string, as used in printf(), et. al.
969 ... - Variable argument list.
971 ..or.. va_alist - Old style variable parameter list starting point.
973 Output: Always True. See dbghdr() for more info, though this is not
974 likely to be used in the same way.
976 ***************************************************************************/
978 BOOL dbgtext( const char *format_str, ... )
983 va_start( ap, format_str );
984 vslprintf( msgbuf, sizeof(msgbuf)-1, format_str, ap );
987 format_debug_text( msgbuf );