2 Unix SMB/Netbios implementation.
4 Samba utility functions
5 Copyright (C) Andrew Tridgell 1992-1998
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 /* -------------------------------------------------------------------------- **
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 nul byte.
32 #define FORMAT_BUFR_MAX ( sizeof( format_bufr ) - 1 )
34 /* -------------------------------------------------------------------------- **
35 * This module implements Samba's debugging utility.
37 * The syntax of a debugging log file is represented as:
39 * <debugfile> :== { <debugmsg> }
41 * <debugmsg> :== <debughdr> '\n' <debugtext>
43 * <debughdr> :== '[' TIME ',' LEVEL ']' [ [FILENAME ':'] [FUNCTION '()'] ]
45 * <debugtext> :== { <debugline> }
47 * <debugline> :== TEXT '\n'
49 * TEXT is a string of characters excluding the newline character.
50 * LEVEL is the DEBUG level of the message (an integer in the range 0..10).
51 * TIME is a timestamp.
52 * FILENAME is the name of the file from which the debug message was generated.
53 * FUNCTION is the function from which the debug message was generated.
55 * Basically, what that all means is:
57 * - A debugging log file is made up of debug messages.
59 * - Each debug message is made up of a header and text. The header is
60 * separated from the text by a newline.
62 * - The header begins with the timestamp and debug level of the message
63 * enclosed in brackets. The filename and function from which the
64 * message was generated may follow. The filename is terminated by a
65 * colon, and the function name is terminated by parenthesis.
67 * - The message text is made up of zero or more lines, each terminated by
71 /* -------------------------------------------------------------------------- **
74 * dbf - Global debug file handle.
75 * debugf - Debug file name.
76 * append_log - If True, then the output file will be opened in append
78 * DEBUGLEVEL - System-wide debug message limit. Messages with message-
79 * levels higher than DEBUGLEVEL will not be processed.
84 BOOL append_log = False;
86 int DEBUGLEVEL_CLASS[DBGC_LAST];
87 int DEBUGLEVEL = DEBUGLEVEL_CLASS;
90 /* -------------------------------------------------------------------------- **
93 * stdout_logging - Default False, if set to True then dbf will be set to
94 * stdout and debug output will go to dbf only, and not
95 * to syslog. Set in setup_logging() and read in Debug1().
97 * debug_count - Number of debug messages that have been output.
98 * Used to check log size.
100 * syslog_level - Internal copy of the message debug level. Written by
101 * dbghdr() and read by Debug1().
103 * format_bufr - Used to format debug messages. The dbgtext() function
104 * prints debug messages to a string, and then passes the
105 * string to format_debug_text(), which uses format_bufr
106 * to build the formatted output.
108 * format_pos - Marks the first free byte of the format_bufr.
111 * log_overflow - When this variable is True, never attempt to check the
112 * size of the log. This is a hack, so that we can write
113 * a message using DEBUG, from open_logs() when we
114 * are unable to open a new log file for some reason.
117 static BOOL stdout_logging = False;
118 static int debug_count = 0;
120 static int syslog_level = 0;
122 static pstring format_bufr = { '\0' };
123 static size_t format_pos = 0;
124 static BOOL log_overflow = False;
127 * Define all the debug class selection names here. Names *MUST NOT* contain
128 * white space. There must be one name for each DBGC_<class name>, and they
129 * must be in the table in the order of DBGC_<class name>..
131 char *classname_table[] = {
132 "all", /* DBGC_ALL; index references traditional DEBUGLEVEL */
133 "tdb", /* DBGC_TDB */
134 "printdrivers", /* DBGC_PRINTDRIVERS */
135 "lanman", /* DBGC_LANMAN */
136 "smb", /* DBGC_SMB */
137 "rpc", /* DBGC_RPC */
138 "rpc_hdr", /* DBGC_RPC_HDR */
142 /* -------------------------------------------------------------------------- **
146 /****************************************************************************
147 utility access to debug class names's
148 ****************************************************************************/
149 char* debug_classname_from_index(int ndx)
151 return classname_table[ndx];
154 /****************************************************************************
155 utility to translate names to debug class index's
156 ****************************************************************************/
157 int debug_lookup_classname(char* classname)
161 if (!classname) return -1;
163 for (i=0; i<DBGC_LAST; i++) {
164 if (strcmp(classname, classname_table[i])==0)
170 /****************************************************************************
171 parse the debug levels from smbcontrol. Example debug level parameter:
173 ****************************************************************************/
174 BOOL debug_parse_params(char **params, int *debuglevel_class)
180 /* Set the new debug level array to the current DEBUGLEVEL array */
181 memcpy(debuglevel_class, DEBUGLEVEL_CLASS, sizeof(DEBUGLEVEL_CLASS));
183 /* Allow DBGC_ALL to be specifies w/o requiring its class name e.g."10"
184 * v.s. "all:10", this is the traditional way to set DEBUGLEVEL
186 if (isdigit((int)params[0][0])) {
187 debuglevel_class[DBGC_ALL] = atoi(params[0]);
188 i = 1; /* start processing at the next params */
191 i = 0; /* DBGC_ALL not specified OR calss name was included */
193 /* Fill in new debug class levels */
194 for (; i < DBGC_LAST && params[i]; i++) {
195 if ((class_name=strtok(params[i],":")) &&
196 (class_level=strtok(NULL, "\0")) &&
197 ((ndx = debug_lookup_classname(class_name)) != -1)) {
198 debuglevel_class[ndx] = atoi(class_level);
200 DEBUG(0,("debug_parse_params: unrecognized debug class name or format [%s]\n", params[i]));
208 /****************************************************************************
209 parse the debug levels from smb.conf. Example debug level string:
210 3 tdb:5 printdrivers:7
211 Note: the 1st param has no "name:" preceeding it.
212 ****************************************************************************/
213 BOOL debug_parse_levels(char *params_str)
216 char *params[DBGC_LAST];
217 int debuglevel_class[DBGC_LAST];
220 ZERO_ARRAY(debuglevel_class);
222 if ((params[0]=strtok(params_str," ,"))) {
223 for (i=1; i<DBGC_LAST;i++) {
224 if ((params[i]=strtok(NULL," ,"))==NULL)
231 if (debug_parse_params(params, debuglevel_class)) {
232 debug_message(0, getpid(), (void*)debuglevel_class, sizeof(debuglevel_class));
235 memcpy(DEBUGLEVEL_CLASS, debuglevel_class,
236 sizeof(debuglevel_class));
243 /****************************************************************************
244 receive a "set debug level" message
245 ****************************************************************************/
246 void debug_message(int msg_type, pid_t src, void *buf, size_t len)
250 /* Set the new DEBUGLEVEL_CLASS array from the pased array */
251 memcpy(DEBUGLEVEL_CLASS, buf, sizeof(DEBUGLEVEL_CLASS));
253 DEBUG(1,("INFO: Debug class %s level = %d (pid %u from pid %u)\n",
254 classname_table[DBGC_ALL],
255 DEBUGLEVEL_CLASS[DBGC_ALL], (unsigned int)getpid(), (unsigned int)src));
257 for (i=1; i<DBGC_LAST; i++) {
258 if (DEBUGLEVEL_CLASS[i])
259 DEBUGADD(1,("INFO: Debug class %s level = %d\n",
260 classname_table[i], DEBUGLEVEL_CLASS[i]));
265 /****************************************************************************
266 send a "set debug level" message
267 ****************************************************************************/
268 void debug_message_send(pid_t pid, int level)
270 message_send_pid(pid, MSG_DEBUG, &level, sizeof(int), False);
274 /* ************************************************************************** **
275 * get ready for syslog stuff
276 * ************************************************************************** **
278 void setup_logging(char *pname, BOOL interactive)
280 message_register(MSG_DEBUG, debug_message);
282 /* reset to allow multiple setup calls, going from interactive to
284 stdout_logging = False;
288 stdout_logging = True;
293 char *p = strrchr( pname,'/' );
297 openlog( pname, LOG_PID, SYSLOG_FACILITY );
298 #else /* for old systems that have no facility codes. */
299 openlog( pname, LOG_PID );
303 } /* setup_logging */
305 /* ************************************************************************** **
306 * reopen the log files
307 * note that we now do this unconditionally
308 * We attempt to open the new debug fp before closing the old. This means
309 * if we run out of fd's we just keep using the old fd rather than aborting.
310 * Fix from dgibson@linuxcare.com.
311 * ************************************************************************** **
314 BOOL reopen_logs( void )
318 FILE *new_dbf = NULL;
324 if (DEBUGLEVEL_CLASS[ DBGC_ALL ] <= 0) {
332 oldumask = umask( 022 );
334 pstrcpy(fname, debugf );
335 if (lp_loaded() && (*lp_logfile()))
336 pstrcpy(fname, lp_logfile());
338 pstrcpy( debugf, fname );
340 new_dbf = sys_fopen( debugf, "a" );
342 new_dbf = sys_fopen( debugf, "w" );
346 DEBUG(0, ("Unable to open new log file %s: %s\n", debugf, strerror(errno)));
347 log_overflow = False;
351 setbuf(new_dbf, NULL);
357 /* Fix from klausr@ITAP.Physik.Uni-Stuttgart.De
358 * to fix problem where smbd's that generate less
359 * than 100 messages keep growing the log.
361 force_check_log_size();
362 (void)umask(oldumask);
367 /* ************************************************************************** **
368 * Force a check of the log size.
369 * ************************************************************************** **
371 void force_check_log_size( void )
376 /***************************************************************************
377 Check to see if there is any need to check if the logfile has grown too big.
378 **************************************************************************/
380 BOOL need_to_check_log_size( void )
384 if( debug_count++ < 100 )
387 maxlog = lp_max_log_size() * 1024;
388 if( !dbf || maxlog <= 0 ) {
395 /* ************************************************************************** **
396 * Check to see if the log has grown to be too big.
397 * ************************************************************************** **
400 void check_log_size( void )
406 * We need to be root to check/change log-file, skip this and let the main
407 * loop check do a new check as root.
413 if(log_overflow || !need_to_check_log_size() )
416 maxlog = lp_max_log_size() * 1024;
418 if( sys_fstat( fileno( dbf ), &st ) == 0 && st.st_size > maxlog ) {
420 if( dbf && get_file_size( debugf ) > maxlog ) {
423 slprintf( name, sizeof(name)-1, "%s.old", debugf );
424 (void)rename( debugf, name );
426 if (!reopen_logs()) {
427 /* We failed to reopen a log - continue using the old name. */
428 (void)rename(name, debugf);
434 * Here's where we need to panic if dbf == NULL..
438 /* This code should only be reached in very strange
439 circumstances. If we merely fail to open the new log we
440 should stick with the old one. ergo this should only be
441 reached when opening the logs for the first time: at
442 startup or when the log level is increased from zero.
445 dbf = sys_fopen( "/dev/console", "w" );
447 DEBUG(0,("check_log_size: open of debug file %s failed - using console.\n",
451 * We cannot continue without a debug file handle.
457 } /* check_log_size */
459 /* ************************************************************************** **
460 * Write an debug message on the debugfile.
461 * This is called by dbghdr() and format_debug_text().
462 * ************************************************************************** **
464 int Debug1( char *format_str, ... )
467 int old_errno = errno;
471 va_start( ap, format_str );
473 (void)vfprintf( dbf, format_str, ap );
480 if( !lp_syslog_only() )
485 mode_t oldumask = umask( 022 );
488 dbf = sys_fopen( debugf, "a" );
490 dbf = sys_fopen( debugf, "w" );
491 (void)umask( oldumask );
505 if( syslog_level < lp_syslog() )
507 /* map debug levels to syslog() priorities
508 * note that not all DEBUG(0, ...) calls are
511 static int priority_map[] = {
520 if( syslog_level >= ( sizeof(priority_map) / sizeof(priority_map[0]) )
522 priority = LOG_DEBUG;
524 priority = priority_map[syslog_level];
526 va_start( ap, format_str );
527 vslprintf( msgbuf, sizeof(msgbuf)-1, format_str, ap );
531 syslog( priority, "%s", msgbuf );
538 if( !lp_syslog_only() )
541 va_start( ap, format_str );
543 (void)vfprintf( dbf, format_str, ap );
555 /* ************************************************************************** **
556 * Print the buffer content via Debug1(), then reset the buffer.
561 * ************************************************************************** **
563 static void bufr_print( void )
565 format_bufr[format_pos] = '\0';
566 (void)Debug1( "%s", format_bufr );
570 /* ************************************************************************** **
571 * Format the debug message text.
573 * Input: msg - Text to be added to the "current" debug message text.
577 * Notes: The purpose of this is two-fold. First, each call to syslog()
578 * (used by Debug1(), see above) generates a new line of syslog
579 * output. This is fixed by storing the partial lines until the
580 * newline character is encountered. Second, printing the debug
581 * message lines when a newline is encountered allows us to add
582 * spaces, thus indenting the body of the message and making it
585 * ************************************************************************** **
587 static void format_debug_text( char *msg )
590 BOOL timestamp = (!stdout_logging && (lp_timestamp_logs() ||
593 for( i = 0; msg[i]; i++ )
595 /* Indent two spaces at each new line. */
596 if(timestamp && 0 == format_pos)
598 format_bufr[0] = format_bufr[1] = ' ';
602 /* If there's room, copy the character to the format buffer. */
603 if( format_pos < FORMAT_BUFR_MAX )
604 format_bufr[format_pos++] = msg[i];
606 /* If a newline is encountered, print & restart. */
610 /* If the buffer is full dump it out, reset it, and put out a line
611 * continuation indicator.
613 if( format_pos >= FORMAT_BUFR_MAX )
616 (void)Debug1( " +>\n" );
620 /* Just to be safe... */
621 format_bufr[format_pos] = '\0';
622 } /* format_debug_text */
624 /* ************************************************************************** **
625 * Flush debug output, including the format buffer content.
630 * ************************************************************************** **
632 void dbgflush( void )
639 /* ************************************************************************** **
640 * Print a Debug Header.
642 * Input: level - Debug level of the message (not the system-wide debug
644 * file - Pointer to a string containing the name of the file
645 * from which this function was called, or an empty string
646 * if the __FILE__ macro is not implemented.
647 * func - Pointer to a string containing the name of the function
648 * from which this function was called, or an empty string
649 * if the __FUNCTION__ macro is not implemented.
650 * line - line number of the call to dbghdr, assuming __LINE__
653 * Output: Always True. This makes it easy to fudge a call to dbghdr()
654 * in a macro, since the function can be called as part of a test.
655 * Eg: ( (level <= DEBUGLEVEL) && (dbghdr(level,"",line)) )
657 * Notes: This function takes care of setting syslog_level.
659 * ************************************************************************** **
662 BOOL dbghdr( int level, char *file, char *func, int line )
664 /* Ensure we don't lose any real errno value. */
665 int old_errno = errno;
668 /* This is a fudge. If there is stuff sitting in the format_bufr, then
669 * the *right* thing to do is to call
670 * format_debug_text( "\n" );
671 * to write the remainder, and then proceed with the new header.
672 * Unfortunately, there are several places in the code at which
673 * the DEBUG() macro is used to build partial lines. That in mind,
674 * we'll work under the assumption that an incomplete line indicates
675 * that a new header is *not* desired.
681 /* Set syslog_level. */
682 syslog_level = level;
685 /* Don't print a header if we're logging to stdout. */
689 /* Print the header if timestamps are turned on. If parameters are
690 * not yet loaded, then default to timestamps on.
692 if( lp_timestamp_logs() || !(lp_loaded()) ) {
693 char header_str[200];
695 header_str[0] = '\0';
698 slprintf(header_str,sizeof(header_str)-1,", pid=%u",(unsigned int)sys_getpid());
700 if( lp_debug_uid()) {
701 size_t hs_len = strlen(header_str);
702 slprintf(header_str + hs_len,
703 sizeof(header_str) - 1 - hs_len,
704 ", effective(%u, %u), real(%u, %u)",
705 (unsigned int)geteuid(), (unsigned int)getegid(),
706 (unsigned int)getuid(), (unsigned int)getgid());
709 /* Print it all out at once to prevent split syslog output. */
710 (void)Debug1( "[%s, %d%s] %s:%s(%d)\n",
711 timestring(lp_debug_hires_timestamp()), level,
712 header_str, file, func, line );
719 /* ************************************************************************** **
720 * Add text to the body of the "current" debug message via the format buffer.
722 * Input: format_str - Format string, as used in printf(), et. al.
723 * ... - Variable argument list.
725 * ..or.. va_alist - Old style variable parameter list starting point.
727 * Output: Always True. See dbghdr() for more info, though this is not
728 * likely to be used in the same way.
730 * ************************************************************************** **
732 BOOL dbgtext( char *format_str, ... )
737 va_start( ap, format_str );
738 vslprintf( msgbuf, sizeof(msgbuf)-1, format_str, ap );
741 format_debug_text( msgbuf );
747 /* ************************************************************************** */