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 3 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, see <http://www.gnu.org/licenses/>.
24 #include "system/filesys.h"
25 #include "system/syslog.h"
26 #include "system/locale.h"
27 #include "time_basic.h"
28 #include "close_low_fd.h"
30 #include "util_strlist.h" /* LIST_SEP */
34 /* define what facility to use for syslog */
35 #ifndef SYSLOG_FACILITY
36 #define SYSLOG_FACILITY LOG_DAEMON
39 /* -------------------------------------------------------------------------- **
44 * format_bufr[FORMAT_BUFR_SIZE - 1] should always be reserved
45 * for a terminating null byte.
47 #define FORMAT_BUFR_SIZE 1024
49 /* -------------------------------------------------------------------------- **
50 * This module implements Samba's debugging utility.
52 * The syntax of a debugging log file is represented as:
54 * <debugfile> :== { <debugmsg> }
56 * <debugmsg> :== <debughdr> '\n' <debugtext>
58 * <debughdr> :== '[' TIME ',' LEVEL ']' [ [FILENAME ':'] [FUNCTION '()'] ]
60 * <debugtext> :== { <debugline> }
62 * <debugline> :== TEXT '\n'
64 * TEXT is a string of characters excluding the newline character.
65 * LEVEL is the DEBUG level of the message (an integer in the range 0..10).
66 * TIME is a timestamp.
67 * FILENAME is the name of the file from which the debug message was generated.
68 * FUNCTION is the function from which the debug message was generated.
70 * Basically, what that all means is:
72 * - A debugging log file is made up of debug messages.
74 * - Each debug message is made up of a header and text. The header is
75 * separated from the text by a newline.
77 * - The header begins with the timestamp and debug level of the message
78 * enclosed in brackets. The filename and function from which the
79 * message was generated may follow. The filename is terminated by a
80 * colon, and the function name is terminated by parenthesis.
82 * - The message text is made up of zero or more lines, each terminated by
86 /* state variables for the debug system */
89 int fd; /* The log file handle */
90 enum debug_logtype logtype; /* The type of logging we are doing: eg stdout, file, stderr */
91 const char *prog_name;
93 bool schedule_reopen_logs;
95 struct debug_settings settings;
97 debug_callback_fn callback;
98 void *callback_private;
101 .timestamp_logs = true
103 .fd = 2 /* stderr by default */
106 #if defined(WITH_SYSLOG) || defined(HAVE_LIBSYSTEMD_JOURNAL) || defined(HAVE_LIBSYSTEMD)
107 static int debug_level_to_priority(int level)
110 * map debug levels to syslog() priorities
112 static const int priority_map[] = {
126 if( level >= ARRAY_SIZE(priority_map) || level < 0)
127 priority = LOG_DEBUG;
129 priority = priority_map[level];
135 /* -------------------------------------------------------------------------- **
136 * Debug backends. When logging to DEBUG_FILE, send the log entries to
137 * all active backends.
140 static void debug_file_log(int msg_level,
141 const char *msg, const char *msg_no_nl)
147 ret = write(state.fd, msg, strlen(msg));
148 } while (ret == -1 && errno == EINTR);
152 static void debug_syslog_reload(bool enabled, bool previously_enabled,
153 const char *prog_name, char *option)
155 if (enabled && !previously_enabled) {
157 openlog(prog_name, LOG_PID, SYSLOG_FACILITY);
159 /* for old systems that have no facility codes. */
160 openlog(prog_name, LOG_PID );
165 if (!enabled && previously_enabled) {
170 static void debug_syslog_log(int msg_level,
171 const char *msg, const char *msg_no_nl)
175 priority = debug_level_to_priority(msg_level);
178 * Specify the facility to interoperate with other syslog
179 * callers (vfs_full_audit for example).
181 priority |= SYSLOG_FACILITY;
183 syslog(priority, "%s", msg);
185 #endif /* WITH_SYSLOG */
187 #if defined(HAVE_LIBSYSTEMD_JOURNAL) || defined(HAVE_LIBSYSTEMD)
188 #include <systemd/sd-journal.h>
189 static void debug_systemd_log(int msg_level,
190 const char *msg, const char *msg_no_nl)
192 sd_journal_send("MESSAGE=%s", msg_no_nl,
193 "PRIORITY=%d", debug_level_to_priority(msg_level),
194 "LEVEL=%d", msg_level,
199 #ifdef HAVE_LTTNG_TRACEF
200 #include <lttng/tracef.h>
201 static void debug_lttng_log(int msg_level,
202 const char *msg, const char *msg_no_nl)
206 #endif /* WITH_LTTNG_TRACEF */
209 #include "gpfswrap.h"
210 static void debug_gpfs_reload(bool enabled, bool previously_enabled,
211 const char *prog_name, char *option)
215 if (enabled && !previously_enabled) {
216 gpfswrap_init_trace();
220 if (!enabled && previously_enabled) {
221 gpfswrap_fini_trace();
227 * Trigger GPFS library to adjust state if necessary.
229 gpfswrap_query_trace();
233 static void debug_gpfs_log(int msg_level,
234 const char *msg, const char *msg_no_nl)
236 gpfswrap_add_trace(msg_level, msg_no_nl);
238 #endif /* HAVE_GPFS */
240 #define DEBUG_RINGBUF_SIZE (1024 * 1024)
241 #define DEBUG_RINGBUF_SIZE_OPT "size="
243 static char *debug_ringbuf;
244 static size_t debug_ringbuf_size;
245 static size_t debug_ringbuf_ofs;
247 /* We ensure in debug_ringbuf_log() that this is always \0 terminated */
248 char *debug_get_ringbuf(void)
250 return debug_ringbuf;
253 /* Return the size of the ringbuf (including a \0 terminator) */
254 size_t debug_get_ringbuf_size(void)
256 return debug_ringbuf_size;
259 static void debug_ringbuf_reload(bool enabled, bool previously_enabled,
260 const char *prog_name, char *option)
263 size_t optlen = strlen(DEBUG_RINGBUF_SIZE_OPT);
265 debug_ringbuf_size = DEBUG_RINGBUF_SIZE;
266 debug_ringbuf_ofs = 0;
268 SAFE_FREE(debug_ringbuf);
274 if (option != NULL) {
275 cmp = strncmp(option, DEBUG_RINGBUF_SIZE_OPT, optlen);
277 debug_ringbuf_size = (size_t)strtoull(
278 option + optlen, NULL, 10);
282 debug_ringbuf = calloc(debug_ringbuf_size, sizeof(char));
283 if (debug_ringbuf == NULL) {
288 static void debug_ringbuf_log(int msg_level,
290 const char *msg_no_nl)
292 size_t msglen = strlen(msg);
295 if (debug_ringbuf == NULL) {
299 /* Ensure the buffer is always \0 terminated */
300 allowed_size = debug_ringbuf_size - 1;
302 if (msglen > allowed_size) {
306 if ((debug_ringbuf_ofs + msglen) < debug_ringbuf_ofs) {
310 if ((debug_ringbuf_ofs + msglen) > allowed_size) {
311 debug_ringbuf_ofs = 0;
314 memcpy(debug_ringbuf + debug_ringbuf_ofs, msg, msglen);
315 debug_ringbuf_ofs += msglen;
318 static struct debug_backend {
322 void (*reload)(bool enabled, bool prev_enabled,
323 const char *prog_name, char *option);
324 void (*log)(int msg_level, const char *msg, const char *msg_no_nl);
326 } debug_backends[] = {
329 .log = debug_file_log,
334 .reload = debug_syslog_reload,
335 .log = debug_syslog_log,
339 #if defined(HAVE_LIBSYSTEMD_JOURNAL) || defined(HAVE_LIBSYSTEMD)
342 .log = debug_systemd_log,
346 #ifdef HAVE_LTTNG_TRACEF
349 .log = debug_lttng_log,
356 .reload = debug_gpfs_reload,
357 .log = debug_gpfs_log,
362 .log = debug_ringbuf_log,
363 .reload = debug_ringbuf_reload,
367 static struct debug_backend *debug_find_backend(const char *name)
371 for (i = 0; i < ARRAY_SIZE(debug_backends); i++) {
372 if (strcmp(name, debug_backends[i].name) == 0) {
373 return &debug_backends[i];
381 * parse "backend[:option][@loglevel]
383 static void debug_backend_parse_token(char *tok)
385 char *backend_name_option, *backend_name,*backend_level, *saveptr;
386 char *backend_option;
387 struct debug_backend *b;
390 * First parse into backend[:option] and loglevel
392 backend_name_option = strtok_r(tok, "@\0", &saveptr);
393 if (backend_name_option == NULL) {
397 backend_level = strtok_r(NULL, "\0", &saveptr);
400 * Now parse backend[:option]
402 backend_name = strtok_r(backend_name_option, ":\0", &saveptr);
403 if (backend_name == NULL) {
407 backend_option = strtok_r(NULL, "\0", &saveptr);
410 * Find and update backend
412 b = debug_find_backend(backend_name);
417 if (backend_level == NULL) {
418 b->new_log_level = MAX_DEBUG_LEVEL;
420 b->new_log_level = atoi(backend_level);
423 if (backend_option != NULL) {
424 b->option = strdup(backend_option);
425 if (b->option == NULL) {
432 * parse "backend1[:option1][@loglevel1] backend2[option2][@loglevel2] ... "
433 * and enable/disable backends accordingly
435 static void debug_set_backends(const char *param)
437 size_t str_len = strlen(param);
443 * initialize new_log_level to detect backends that have been
446 for (i = 0; i < ARRAY_SIZE(debug_backends); i++) {
447 SAFE_FREE(debug_backends[i].option);
448 debug_backends[i].new_log_level = -1;
451 memcpy(str, param, str_len + 1);
453 tok = strtok_r(str, LIST_SEP, &saveptr);
458 while (tok != NULL) {
459 debug_backend_parse_token(tok);
460 tok = strtok_r(NULL, LIST_SEP, &saveptr);
464 * Let backends react to config changes
466 for (i = 0; i < ARRAY_SIZE(debug_backends); i++) {
467 struct debug_backend *b = &debug_backends[i];
470 bool enabled = b->new_log_level > -1;
471 bool previously_enabled = b->log_level > -1;
473 b->reload(enabled, previously_enabled, state.prog_name,
476 b->log_level = b->new_log_level;
480 static void debug_backends_log(const char *msg, int msg_level)
482 char msg_no_nl[FORMAT_BUFR_SIZE];
487 * Some backends already add an extra newline, so also provide
488 * a buffer without the newline character.
490 len = MIN(strlen(msg), FORMAT_BUFR_SIZE - 1);
491 if (msg[len - 1] == '\n') {
495 memcpy(msg_no_nl, msg, len);
496 msg_no_nl[len] = '\0';
498 for (i = 0; i < ARRAY_SIZE(debug_backends); i++) {
499 if (msg_level <= debug_backends[i].log_level) {
500 debug_backends[i].log(msg_level, msg, msg_no_nl);
505 /* -------------------------------------------------------------------------- **
506 * External variables.
510 used to check if the user specified a
511 logfile on the command line
513 bool override_logfile;
515 static const char *default_classname_table[] = {
518 [DBGC_PRINTDRIVERS] = "printdrivers",
519 [DBGC_LANMAN] = "lanman",
521 [DBGC_RPC_PARSE] = "rpc_parse",
522 [DBGC_RPC_SRV] = "rpc_srv",
523 [DBGC_RPC_CLI] = "rpc_cli",
524 [DBGC_PASSDB] = "passdb",
526 [DBGC_AUTH] = "auth",
527 [DBGC_WINBIND] = "winbind",
529 [DBGC_IDMAP] = "idmap",
530 [DBGC_QUOTA] = "quota",
531 [DBGC_ACLS] = "acls",
532 [DBGC_LOCKING] = "locking",
533 [DBGC_MSDFS] = "msdfs",
534 [DBGC_DMAPI] = "dmapi",
535 [DBGC_REGISTRY] = "registry",
536 [DBGC_SCAVENGER] = "scavenger",
539 [DBGC_TEVENT] = "tevent",
540 [DBGC_AUTH_AUDIT] = "auth_audit",
544 * This is to allow reading of DEBUGLEVEL_CLASS before the debug
545 * system has been initialized.
547 static const int debug_class_list_initial[ARRAY_SIZE(default_classname_table)];
549 static int debug_num_classes = 0;
550 int *DEBUGLEVEL_CLASS = discard_const_p(int, debug_class_list_initial);
553 /* -------------------------------------------------------------------------- **
554 * Internal variables.
556 * debug_count - Number of debug messages that have been output.
557 * Used to check log size.
559 * current_msg_level - Internal copy of the message debug level. Written by
560 * dbghdr() and read by Debug1().
562 * format_bufr - Used to format debug messages. The dbgtext() function
563 * prints debug messages to a string, and then passes the
564 * string to format_debug_text(), which uses format_bufr
565 * to build the formatted output.
567 * format_pos - Marks the first free byte of the format_bufr.
570 * log_overflow - When this variable is true, never attempt to check the
571 * size of the log. This is a hack, so that we can write
572 * a message using DEBUG, from open_logs() when we
573 * are unable to open a new log file for some reason.
576 static int debug_count = 0;
577 static int current_msg_level = 0;
578 static char format_bufr[FORMAT_BUFR_SIZE];
579 static size_t format_pos = 0;
580 static bool log_overflow = false;
583 * Define all the debug class selection names here. Names *MUST NOT* contain
584 * white space. There must be one name for each DBGC_<class name>, and they
585 * must be in the table in the order of DBGC_<class name>..
588 static char **classname_table = NULL;
591 /* -------------------------------------------------------------------------- **
595 static void debug_init(void);
597 /***************************************************************************
598 Free memory pointed to by global pointers.
599 ****************************************************************************/
601 void gfree_debugsyms(void)
605 TALLOC_FREE(classname_table);
607 if ( DEBUGLEVEL_CLASS != debug_class_list_initial ) {
608 TALLOC_FREE( DEBUGLEVEL_CLASS );
609 DEBUGLEVEL_CLASS = discard_const_p(int, debug_class_list_initial);
612 debug_num_classes = 0;
614 state.initialized = false;
616 for (i = 0; i < ARRAY_SIZE(debug_backends); i++) {
617 SAFE_FREE(debug_backends[i].option);
621 /****************************************************************************
622 utility lists registered debug class names's
623 ****************************************************************************/
625 char *debug_list_class_names_and_levels(void)
629 /* prepare strings */
630 for (i = 0; i < debug_num_classes; i++) {
631 buf = talloc_asprintf_append(buf,
635 i == (debug_num_classes - 1) ? "\n" : " ");
643 /****************************************************************************
644 Utility to translate names to debug class index's (internal version).
645 ****************************************************************************/
647 static int debug_lookup_classname_int(const char* classname)
651 if (!classname) return -1;
653 for (i=0; i < debug_num_classes; i++) {
654 if (strcmp(classname, classname_table[i])==0)
660 /****************************************************************************
661 Add a new debug class to the system.
662 ****************************************************************************/
664 int debug_add_class(const char *classname)
668 char **new_name_list;
674 /* check the init has yet been called */
677 ndx = debug_lookup_classname_int(classname);
680 ndx = debug_num_classes;
682 if (DEBUGLEVEL_CLASS == debug_class_list_initial) {
683 /* Initial loading... */
684 new_class_list = NULL;
686 new_class_list = DEBUGLEVEL_CLASS;
689 default_level = DEBUGLEVEL_CLASS[DBGC_ALL];
691 new_class_list = talloc_realloc(NULL, new_class_list, int, ndx + 1);
694 DEBUGLEVEL_CLASS = new_class_list;
696 DEBUGLEVEL_CLASS[ndx] = default_level;
698 new_name_list = talloc_realloc(NULL, classname_table, char *, ndx + 1);
701 classname_table = new_name_list;
703 classname_table[ndx] = talloc_strdup(classname_table, classname);
704 if (! classname_table[ndx])
707 debug_num_classes = ndx + 1;
712 /****************************************************************************
713 Utility to translate names to debug class index's (public version).
714 ****************************************************************************/
716 static int debug_lookup_classname(const char *classname)
720 if (!classname || !*classname)
723 ndx = debug_lookup_classname_int(classname);
728 DEBUG(0, ("debug_lookup_classname(%s): Unknown class\n",
730 return debug_add_class(classname);
733 /****************************************************************************
734 Dump the current registered debug levels.
735 ****************************************************************************/
737 static void debug_dump_status(int level)
741 DEBUG(level, ("INFO: Current debug levels:\n"));
742 for (q = 0; q < debug_num_classes; q++) {
743 const char *classname = classname_table[q];
744 DEBUGADD(level, (" %s: %d\n",
746 DEBUGLEVEL_CLASS[q]));
750 static bool debug_parse_param(char *param)
754 char *saveptr = NULL;
757 class_name = strtok_r(param, ":", &saveptr);
758 if (class_name == NULL) {
762 class_level = strtok_r(NULL, "\0", &saveptr);
763 if (class_level == NULL) {
767 ndx = debug_lookup_classname(class_name);
772 DEBUGLEVEL_CLASS[ndx] = atoi(class_level);
777 /****************************************************************************
778 Parse the debug levels from smb.conf. Example debug level string:
779 3 tdb:5 printdrivers:7
780 Note: the 1st param has no "name:" preceeding it.
781 ****************************************************************************/
783 bool debug_parse_levels(const char *params_str)
785 size_t str_len = strlen(params_str);
793 memcpy(str, params_str, str_len+1);
795 tok = strtok_r(str, LIST_SEP, &saveptr);
800 /* Allow DBGC_ALL to be specified w/o requiring its class name e.g."10"
801 * v.s. "all:10", this is the traditional way to set DEBUGLEVEL
803 if (isdigit(tok[0])) {
804 DEBUGLEVEL_CLASS[DBGC_ALL] = atoi(tok);
805 tok = strtok_r(NULL, LIST_SEP, &saveptr);
807 DEBUGLEVEL_CLASS[DBGC_ALL] = 0;
810 /* Array is debug_num_classes long */
811 for (i = DBGC_ALL+1; i < debug_num_classes; i++) {
812 DEBUGLEVEL_CLASS[i] = DEBUGLEVEL_CLASS[DBGC_ALL];
815 while (tok != NULL) {
818 ok = debug_parse_param(tok);
820 DEBUG(0,("debug_parse_params: unrecognized debug "
821 "class name or format [%s]\n", tok));
825 tok = strtok_r(NULL, LIST_SEP, &saveptr);
828 debug_dump_status(5);
833 /* setup for logging of talloc warnings */
834 static void talloc_log_fn(const char *msg)
836 DEBUG(0,("%s", msg));
839 void debug_setup_talloc_log(void)
841 talloc_set_log_fn(talloc_log_fn);
845 /****************************************************************************
846 Init debugging (one time stuff)
847 ****************************************************************************/
849 static void debug_init(void)
853 if (state.initialized)
856 state.initialized = true;
858 debug_setup_talloc_log();
860 for (i = 0; i < ARRAY_SIZE(default_classname_table); i++) {
861 debug_add_class(default_classname_table[i]);
864 for (i = 0; i < ARRAY_SIZE(debug_backends); i++) {
865 debug_backends[i].log_level = -1;
866 debug_backends[i].new_log_level = -1;
870 void debug_set_settings(struct debug_settings *settings,
871 const char *logging_param,
872 int syslog_level, bool syslog_only)
874 char fake_param[256];
878 * This forces in some smb.conf derived values into the debug
879 * system. There are no pointers in this structure, so we can
880 * just structure-assign it in
882 state.settings = *settings;
885 * If 'logging' is not set, create backend settings from
886 * deprecated 'syslog' and 'syslog only' parameters
888 if (logging_param != NULL) {
889 len = strlen(logging_param);
893 snprintf(fake_param, sizeof(fake_param),
894 "syslog@%d", syslog_level - 1);
896 snprintf(fake_param, sizeof(fake_param),
897 "syslog@%d file@%d", syslog_level -1,
901 logging_param = fake_param;
904 debug_set_backends(logging_param);
908 control the name of the logfile and whether logging will be to stdout, stderr
909 or a file, and set up syslog
911 new_log indicates the destination for the debug log (an enum in
912 order of precedence - once set to DEBUG_FILE, it is not possible to
913 reset to DEBUG_STDOUT for example. This makes it easy to override
914 for debug to stderr on the command line, as the smb.conf cannot
915 reset it back to file-based logging
917 void setup_logging(const char *prog_name, enum debug_logtype new_logtype)
920 if (state.logtype < new_logtype) {
921 state.logtype = new_logtype;
924 const char *p = strrchr(prog_name, '/');
930 state.prog_name = prog_name;
932 reopen_logs_internal();
935 /***************************************************************************
936 Set the logfile name.
937 **************************************************************************/
939 void debug_set_logfile(const char *name)
941 if (name == NULL || *name == 0) {
942 /* this copes with calls when smb.conf is not loaded yet */
945 TALLOC_FREE(state.debugf);
946 state.debugf = talloc_strdup(NULL, name);
949 static void debug_close_fd(int fd)
956 bool debug_get_output_is_stderr(void)
958 return (state.logtype == DEBUG_DEFAULT_STDERR) || (state.logtype == DEBUG_STDERR);
961 bool debug_get_output_is_stdout(void)
963 return (state.logtype == DEBUG_DEFAULT_STDOUT) || (state.logtype == DEBUG_STDOUT);
966 void debug_set_callback(void *private_ptr, debug_callback_fn fn)
970 state.logtype = DEBUG_CALLBACK;
971 state.callback_private = private_ptr;
974 state.logtype = DEBUG_DEFAULT_STDERR;
975 state.callback_private = NULL;
976 state.callback = NULL;
980 static void debug_callback_log(const char *msg, int msg_level)
982 size_t msg_len = strlen(msg);
983 char msg_copy[msg_len];
985 if ((msg_len > 0) && (msg[msg_len-1] == '\n')) {
986 memcpy(msg_copy, msg, msg_len-1);
987 msg_copy[msg_len-1] = '\0';
991 state.callback(state.callback_private, msg_level, msg);
994 /**************************************************************************
996 note that we now do this unconditionally
997 We attempt to open the new debug fp before closing the old. This means
998 if we run out of fd's we just keep using the old fd rather than aborting.
999 Fix from dgibson@linuxcare.com.
1000 **************************************************************************/
1003 reopen the log file (usually called because the log file name might have changed)
1005 bool reopen_logs_internal(void)
1012 if (state.reopening_logs) {
1016 /* Now clear the SIGHUP induced flag */
1017 state.schedule_reopen_logs = false;
1019 switch (state.logtype) {
1020 case DEBUG_CALLBACK:
1023 case DEBUG_DEFAULT_STDOUT:
1024 debug_close_fd(state.fd);
1028 case DEBUG_DEFAULT_STDERR:
1030 debug_close_fd(state.fd);
1038 oldumask = umask( 022 );
1040 if (!state.debugf) {
1044 state.reopening_logs = true;
1046 new_fd = open( state.debugf, O_WRONLY|O_APPEND|O_CREAT, 0644);
1049 log_overflow = true;
1050 DEBUG(0, ("Unable to open new log file '%s': %s\n", state.debugf, strerror(errno)));
1051 log_overflow = false;
1054 smb_set_close_on_exec(new_fd);
1057 debug_close_fd(old_fd);
1060 /* Fix from klausr@ITAP.Physik.Uni-Stuttgart.De
1061 * to fix problem where smbd's that generate less
1062 * than 100 messages keep growing the log.
1064 force_check_log_size();
1065 (void)umask(oldumask);
1067 /* Take over stderr to catch output into logs */
1069 if (dup2(state.fd, 2) == -1) {
1070 /* Close stderr too, if dup2 can't point it -
1071 at the logfile. There really isn't much
1072 that can be done on such a fundamental
1078 state.reopening_logs = false;
1083 /**************************************************************************
1084 Force a check of the log size.
1085 ***************************************************************************/
1087 void force_check_log_size( void )
1092 _PUBLIC_ void debug_schedule_reopen_logs(void)
1094 state.schedule_reopen_logs = true;
1098 /***************************************************************************
1099 Check to see if there is any need to check if the logfile has grown too big.
1100 **************************************************************************/
1102 bool need_to_check_log_size( void )
1106 if( debug_count < 100)
1109 maxlog = state.settings.max_log_size * 1024;
1110 if ( state.fd <=2 || maxlog <= 0 ) {
1117 /**************************************************************************
1118 Check to see if the log has grown to be too big.
1119 **************************************************************************/
1121 void check_log_size( void )
1127 * We need to be root to check/change log-file, skip this and let the main
1128 * loop check do a new check as root.
1131 #if _SAMBA_BUILD_ == 3
1132 if (geteuid() != sec_initial_uid())
1137 /* We don't check sec_initial_uid() here as it isn't
1138 * available in common code and we don't generally
1139 * want to rotate and the possibly lose logs in
1140 * make test or the build farm */
1144 if(log_overflow || (!state.schedule_reopen_logs && !need_to_check_log_size())) {
1148 maxlog = state.settings.max_log_size * 1024;
1150 if (state.schedule_reopen_logs) {
1151 (void)reopen_logs_internal();
1154 if (maxlog && (fstat(state.fd, &st) == 0
1155 && st.st_size > maxlog )) {
1156 (void)reopen_logs_internal();
1157 if (state.fd > 2 && (fstat(state.fd, &st) == 0
1158 && st.st_size > maxlog)) {
1159 char name[strlen(state.debugf) + 5];
1161 snprintf(name, sizeof(name), "%s.old", state.debugf);
1163 (void)rename(state.debugf, name);
1165 if (!reopen_logs_internal()) {
1166 /* We failed to reopen a log - continue using the old name. */
1167 (void)rename(name, state.debugf);
1173 * Here's where we need to panic if state.fd == 0 or -1 (invalid values)
1176 if (state.fd <= 0) {
1177 /* This code should only be reached in very strange
1178 * circumstances. If we merely fail to open the new log we
1179 * should stick with the old one. ergo this should only be
1180 * reached when opening the logs for the first time: at
1181 * startup or when the log level is increased from zero.
1184 int fd = open( "/dev/console", O_WRONLY, 0);
1186 smb_set_close_on_exec(fd);
1188 DEBUG(0,("check_log_size: open of debug file %s failed - using console.\n",
1192 * We cannot continue without a debug file handle.
1200 /*************************************************************************
1201 Write an debug message on the debugfile.
1202 This is called by dbghdr() and format_debug_text().
1203 ************************************************************************/
1205 static void Debug1(const char *msg)
1207 int old_errno = errno;
1211 switch(state.logtype) {
1212 case DEBUG_CALLBACK:
1213 debug_callback_log(msg, current_msg_level);
1217 case DEBUG_DEFAULT_STDOUT:
1218 case DEBUG_DEFAULT_STDERR:
1222 ret = write(state.fd, msg, strlen(msg));
1223 } while (ret == -1 && errno == EINTR);
1227 debug_backends_log(msg, current_msg_level);
1234 /**************************************************************************
1235 Print the buffer content via Debug1(), then reset the buffer.
1238 ****************************************************************************/
1240 static void bufr_print( void )
1242 format_bufr[format_pos] = '\0';
1243 (void)Debug1(format_bufr);
1247 /***************************************************************************
1248 Format the debug message text.
1250 Input: msg - Text to be added to the "current" debug message text.
1254 Notes: The purpose of this is two-fold. First, each call to syslog()
1255 (used by Debug1(), see above) generates a new line of syslog
1256 output. This is fixed by storing the partial lines until the
1257 newline character is encountered. Second, printing the debug
1258 message lines when a newline is encountered allows us to add
1259 spaces, thus indenting the body of the message and making it
1261 **************************************************************************/
1263 static void format_debug_text( const char *msg )
1266 bool timestamp = (state.logtype == DEBUG_FILE && (state.settings.timestamp_logs));
1270 for( i = 0; msg[i]; i++ ) {
1271 /* Indent two spaces at each new line. */
1272 if(timestamp && 0 == format_pos) {
1273 format_bufr[0] = format_bufr[1] = ' ';
1277 /* If there's room, copy the character to the format buffer. */
1278 if (format_pos < FORMAT_BUFR_SIZE - 1)
1279 format_bufr[format_pos++] = msg[i];
1281 /* If a newline is encountered, print & restart. */
1282 if( '\n' == msg[i] )
1285 /* If the buffer is full dump it out, reset it, and put out a line
1286 * continuation indicator.
1288 if (format_pos >= FORMAT_BUFR_SIZE - 1) {
1290 (void)Debug1( " +>\n" );
1294 /* Just to be safe... */
1295 format_bufr[format_pos] = '\0';
1298 /***************************************************************************
1299 Flush debug output, including the format buffer content.
1303 ***************************************************************************/
1305 void dbgflush( void )
1310 /***************************************************************************
1311 Print a Debug Header.
1313 Input: level - Debug level of the message (not the system-wide debug
1315 cls - Debuglevel class of the calling module.
1316 location - Pointer to a string containing the name of the file
1317 from which this function was called, or an empty string
1318 if the __FILE__ macro is not implemented.
1319 func - Pointer to a string containing the name of the function
1320 from which this function was called, or an empty string
1321 if the __FUNCTION__ macro is not implemented.
1323 Output: Always true. This makes it easy to fudge a call to dbghdr()
1324 in a macro, since the function can be called as part of a test.
1325 Eg: ( (level <= DEBUGLEVEL) && (dbghdr(level,"",line)) )
1327 Notes: This function takes care of setting current_msg_level.
1329 ****************************************************************************/
1331 bool dbghdrclass(int level, int cls, const char *location, const char *func)
1333 /* Ensure we don't lose any real errno value. */
1334 int old_errno = errno;
1335 bool verbose = false;
1336 char header_str[300];
1339 struct timeval_buf tvbuf;
1342 /* This is a fudge. If there is stuff sitting in the format_bufr, then
1343 * the *right* thing to do is to call
1344 * format_debug_text( "\n" );
1345 * to write the remainder, and then proceed with the new header.
1346 * Unfortunately, there are several places in the code at which
1347 * the DEBUG() macro is used to build partial lines. That in mind,
1348 * we'll work under the assumption that an incomplete line indicates
1349 * that a new header is *not* desired.
1354 /* Set current_msg_level. */
1355 current_msg_level = level;
1357 /* Don't print a header if we're logging to stdout. */
1358 if ( state.logtype != DEBUG_FILE ) {
1362 /* Print the header if timestamps are turned on. If parameters are
1363 * not yet loaded, then default to timestamps on.
1365 if (!(state.settings.timestamp_logs ||
1366 state.settings.debug_prefix_timestamp)) {
1371 timeval_str_buf(&tv, false, state.settings.debug_hires_timestamp,
1374 hs_len = snprintf(header_str, sizeof(header_str), "[%s, %2d",
1376 if (hs_len >= sizeof(header_str)) {
1380 if (unlikely(DEBUGLEVEL_CLASS[ cls ] >= 10)) {
1384 if (verbose || state.settings.debug_pid) {
1386 header_str + hs_len, sizeof(header_str) - hs_len,
1387 ", pid=%u", (unsigned int)getpid());
1388 if (hs_len >= sizeof(header_str)) {
1393 if (verbose || state.settings.debug_uid) {
1395 header_str + hs_len, sizeof(header_str) - hs_len,
1396 ", effective(%u, %u), real(%u, %u)",
1397 (unsigned int)geteuid(), (unsigned int)getegid(),
1398 (unsigned int)getuid(), (unsigned int)getgid());
1399 if (hs_len >= sizeof(header_str)) {
1404 if ((verbose || state.settings.debug_class)
1405 && (cls != DBGC_ALL)) {
1407 header_str + hs_len, sizeof(header_str) - hs_len,
1408 ", class=%s", classname_table[cls]);
1409 if (hs_len >= sizeof(header_str)) {
1415 * No +=, see man man strlcat
1417 hs_len = strlcat(header_str, "] ", sizeof(header_str));
1418 if (hs_len >= sizeof(header_str)) {
1422 if (!state.settings.debug_prefix_timestamp) {
1424 header_str + hs_len, sizeof(header_str) - hs_len,
1425 "%s(%s)\n", location, func);
1426 if (hs_len >= sizeof(header_str)) {
1432 (void)Debug1(header_str);
1438 /***************************************************************************
1439 Add text to the body of the "current" debug message via the format buffer.
1441 Input: format_str - Format string, as used in printf(), et. al.
1442 ... - Variable argument list.
1444 ..or.. va_alist - Old style variable parameter list starting point.
1446 Output: Always true. See dbghdr() for more info, though this is not
1447 likely to be used in the same way.
1449 ***************************************************************************/
1451 static inline bool __dbgtext_va(const char *format_str, va_list ap) PRINTF_ATTRIBUTE(1,0);
1452 static inline bool __dbgtext_va(const char *format_str, va_list ap)
1454 char *msgbuf = NULL;
1458 res = vasprintf(&msgbuf, format_str, ap);
1460 format_debug_text(msgbuf);
1468 bool dbgtext_va(const char *format_str, va_list ap)
1470 return __dbgtext_va(format_str, ap);
1473 bool dbgtext(const char *format_str, ... )
1478 va_start(ap, format_str);
1479 ret = __dbgtext_va(format_str, ap);