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;
88 /* -------------------------------------------------------------------------- **
91 * stdout_logging - Default False, if set to True then dbf will be set to
92 * stdout and debug output will go to dbf only, and not
93 * to syslog. Set in setup_logging() and read in Debug1().
95 * debug_count - Number of debug messages that have been output.
96 * Used to check log size.
98 * syslog_level - Internal copy of the message debug level. Written by
99 * dbghdr() and read by Debug1().
101 * format_bufr - Used to format debug messages. The dbgtext() function
102 * prints debug messages to a string, and then passes the
103 * string to format_debug_text(), which uses format_bufr
104 * to build the formatted output.
106 * format_pos - Marks the first free byte of the format_bufr.
109 static BOOL stdout_logging = False;
110 static int debug_count = 0;
112 static int syslog_level = 0;
114 static pstring format_bufr = { '\0' };
115 static size_t format_pos = 0;
118 /* -------------------------------------------------------------------------- **
122 /****************************************************************************
123 receive a "set debug level" message
124 ****************************************************************************/
125 void debug_message(enum message_type msg_type, pid_t src, void *buf, size_t len)
128 memcpy(&level, buf, sizeof(int));
130 DEBUG(1,("Debug level set to %d from pid %d\n", level, (int)src));
133 /****************************************************************************
134 send a "set debug level" message
135 ****************************************************************************/
136 void debug_message_send(pid_t pid, int level)
138 message_send_pid(pid, MSG_DEBUG, &level, sizeof(int));
142 /* ************************************************************************** **
143 * get ready for syslog stuff
144 * ************************************************************************** **
146 void setup_logging(char *pname, BOOL interactive)
148 message_register(MSG_DEBUG, debug_message);
151 stdout_logging = True;
156 char *p = strrchr( pname,'/' );
160 openlog( pname, LOG_PID, SYSLOG_FACILITY );
161 #else /* for old systems that have no facility codes. */
162 openlog( pname, LOG_PID );
166 } /* setup_logging */
168 /* ************************************************************************** **
169 * reopen the log files
170 * note that we now do this unconditionally
171 * ************************************************************************** **
173 void reopen_logs( void )
178 if (DEBUGLEVEL <= 0) {
186 oldumask = umask( 022 );
188 pstrcpy(fname, debugf );
189 if (lp_loaded() && (*lp_logfile()))
190 pstrcpy(fname, lp_logfile());
192 pstrcpy( debugf, fname );
196 dbf = sys_fopen( debugf, "a" );
198 dbf = sys_fopen( debugf, "w" );
199 /* Fix from klausr@ITAP.Physik.Uni-Stuttgart.De
200 * to fix problem where smbd's that generate less
201 * than 100 messages keep growing the log.
203 force_check_log_size();
206 (void)umask(oldumask);
210 /* ************************************************************************** **
211 * Force a check of the log size.
212 * ************************************************************************** **
214 void force_check_log_size( void )
219 /***************************************************************************
220 Check to see if there is any need to check if the logfile has grown too big.
221 **************************************************************************/
223 BOOL need_to_check_log_size( void )
227 if( debug_count++ < 100 )
230 maxlog = lp_max_log_size() * 1024;
231 if( !dbf || maxlog <= 0 ) {
238 /* ************************************************************************** **
239 * Check to see if the log has grown to be too big.
240 * ************************************************************************** **
243 void check_log_size( void )
249 * We need to be root to check/change log-file, skip this and let the main
250 * loop check do a new check as root.
256 if( !need_to_check_log_size() )
259 maxlog = lp_max_log_size() * 1024;
261 if( sys_fstat( fileno( dbf ), &st ) == 0 && st.st_size > maxlog )
266 if( dbf && get_file_size( debugf ) > maxlog )
272 slprintf( name, sizeof(name)-1, "%s.old", debugf );
273 (void)rename( debugf, name );
278 * Here's where we need to panic if dbf == NULL..
281 dbf = sys_fopen( "/dev/console", "w" );
283 DEBUG(0,("check_log_size: open of debug file %s failed - using console.\n",
287 * We cannot continue without a debug file handle.
293 } /* check_log_size */
295 /* ************************************************************************** **
296 * Write an debug message on the debugfile.
297 * This is called by dbghdr() and format_debug_text().
298 * ************************************************************************** **
301 int Debug1( char *format_str, ... )
310 int old_errno = errno;
315 va_start( ap, format_str );
318 format_str = va_arg( ap, char * );
321 (void)vfprintf( dbf, format_str, ap );
328 if( !lp_syslog_only() )
333 mode_t oldumask = umask( 022 );
336 dbf = sys_fopen( debugf, "a" );
338 dbf = sys_fopen( debugf, "w" );
339 (void)umask( oldumask );
353 if( syslog_level < lp_syslog() )
355 /* map debug levels to syslog() priorities
356 * note that not all DEBUG(0, ...) calls are
359 static int priority_map[] = {
368 if( syslog_level >= ( sizeof(priority_map) / sizeof(priority_map[0]) )
370 priority = LOG_DEBUG;
372 priority = priority_map[syslog_level];
375 va_start( ap, format_str );
378 format_str = va_arg( ap, char * );
380 vslprintf( msgbuf, sizeof(msgbuf)-1, format_str, ap );
384 syslog( priority, "%s", msgbuf );
391 if( !lp_syslog_only() )
395 va_start( ap, format_str );
398 format_str = va_arg( ap, char * );
401 (void)vfprintf( dbf, format_str, ap );
413 /* ************************************************************************** **
414 * Print the buffer content via Debug1(), then reset the buffer.
419 * ************************************************************************** **
421 static void bufr_print( void )
423 format_bufr[format_pos] = '\0';
424 (void)Debug1( "%s", format_bufr );
428 /* ************************************************************************** **
429 * Format the debug message text.
431 * Input: msg - Text to be added to the "current" debug message text.
435 * Notes: The purpose of this is two-fold. First, each call to syslog()
436 * (used by Debug1(), see above) generates a new line of syslog
437 * output. This is fixed by storing the partial lines until the
438 * newline character is encountered. Second, printing the debug
439 * message lines when a newline is encountered allows us to add
440 * spaces, thus indenting the body of the message and making it
443 * ************************************************************************** **
445 static void format_debug_text( char *msg )
448 BOOL timestamp = (!stdout_logging && (lp_timestamp_logs() ||
451 for( i = 0; msg[i]; i++ )
453 /* Indent two spaces at each new line. */
454 if(timestamp && 0 == format_pos)
456 format_bufr[0] = format_bufr[1] = ' ';
460 /* If there's room, copy the character to the format buffer. */
461 if( format_pos < FORMAT_BUFR_MAX )
462 format_bufr[format_pos++] = msg[i];
464 /* If a newline is encountered, print & restart. */
468 /* If the buffer is full dump it out, reset it, and put out a line
469 * continuation indicator.
471 if( format_pos >= FORMAT_BUFR_MAX )
474 (void)Debug1( " +>\n" );
478 /* Just to be safe... */
479 format_bufr[format_pos] = '\0';
480 } /* format_debug_text */
482 /* ************************************************************************** **
483 * Flush debug output, including the format buffer content.
488 * ************************************************************************** **
490 void dbgflush( void )
497 /* ************************************************************************** **
498 * Print a Debug Header.
500 * Input: level - Debug level of the message (not the system-wide debug
502 * file - Pointer to a string containing the name of the file
503 * from which this function was called, or an empty string
504 * if the __FILE__ macro is not implemented.
505 * func - Pointer to a string containing the name of the function
506 * from which this function was called, or an empty string
507 * if the __FUNCTION__ macro is not implemented.
508 * line - line number of the call to dbghdr, assuming __LINE__
511 * Output: Always True. This makes it easy to fudge a call to dbghdr()
512 * in a macro, since the function can be called as part of a test.
513 * Eg: ( (level <= DEBUGLEVEL) && (dbghdr(level,"",line)) )
515 * Notes: This function takes care of setting syslog_level.
517 * ************************************************************************** **
520 BOOL dbghdr( int level, char *file, char *func, int line )
522 /* Ensure we don't lose any real errno value. */
523 int old_errno = errno;
526 /* This is a fudge. If there is stuff sitting in the format_bufr, then
527 * the *right* thing to do is to call
528 * format_debug_text( "\n" );
529 * to write the remainder, and then proceed with the new header.
530 * Unfortunately, there are several places in the code at which
531 * the DEBUG() macro is used to build partial lines. That in mind,
532 * we'll work under the assumption that an incomplete line indicates
533 * that a new header is *not* desired.
539 /* Set syslog_level. */
540 syslog_level = level;
543 /* Don't print a header if we're logging to stdout. */
547 /* Print the header if timestamps are turned on. If parameters are
548 * not yet loaded, then default to timestamps on.
550 if( lp_timestamp_logs() || !(lp_loaded()) ) {
551 char header_str[200];
553 header_str[0] = '\0';
556 slprintf(header_str,sizeof(header_str)-1,", pid=%u",(unsigned int)sys_getpid());
558 if( lp_debug_uid()) {
559 size_t hs_len = strlen(header_str);
560 slprintf(header_str + hs_len,
561 sizeof(header_str) - 1 - hs_len,
562 ", effective(%u, %u), real(%u, %u)",
563 (unsigned int)geteuid(), (unsigned int)getegid(),
564 (unsigned int)getuid(), (unsigned int)getgid());
567 /* Print it all out at once to prevent split syslog output. */
568 (void)Debug1( "[%s, %d%s] %s:%s(%d)\n",
569 timestring(lp_debug_hires_timestamp()), level,
570 header_str, file, func, line );
577 /* ************************************************************************** **
578 * Add text to the body of the "current" debug message via the format buffer.
580 * Input: format_str - Format string, as used in printf(), et. al.
581 * ... - Variable argument list.
583 * ..or.. va_alist - Old style variable parameter list starting point.
585 * Output: Always True. See dbghdr() for more info, though this is not
586 * likely to be used in the same way.
588 * ************************************************************************** **
591 BOOL dbgtext( char *format_str, ... )
596 va_start( ap, format_str );
597 vslprintf( msgbuf, sizeof(msgbuf)-1, format_str, ap );
600 format_debug_text( msgbuf );
606 BOOL dbgtext( va_alist )
614 format_str = va_arg( ap, char * );
615 vslprintf( msgbuf, sizeof(msgbuf)-1, format_str, ap );
618 format_debug_text( msgbuf );
625 /* ************************************************************************** */