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",
541 [DBGC_AUTH_AUDIT_JSON] = "auth_json_audit",
545 * This is to allow reading of DEBUGLEVEL_CLASS before the debug
546 * system has been initialized.
548 static const int debug_class_list_initial[ARRAY_SIZE(default_classname_table)];
550 static int debug_num_classes = 0;
551 int *DEBUGLEVEL_CLASS = discard_const_p(int, debug_class_list_initial);
554 /* -------------------------------------------------------------------------- **
555 * Internal variables.
557 * debug_count - Number of debug messages that have been output.
558 * Used to check log size.
560 * current_msg_level - Internal copy of the message debug level. Written by
561 * dbghdr() and read by Debug1().
563 * format_bufr - Used to format debug messages. The dbgtext() function
564 * prints debug messages to a string, and then passes the
565 * string to format_debug_text(), which uses format_bufr
566 * to build the formatted output.
568 * format_pos - Marks the first free byte of the format_bufr.
571 * log_overflow - When this variable is true, never attempt to check the
572 * size of the log. This is a hack, so that we can write
573 * a message using DEBUG, from open_logs() when we
574 * are unable to open a new log file for some reason.
577 static int debug_count = 0;
578 static int current_msg_level = 0;
579 static char format_bufr[FORMAT_BUFR_SIZE];
580 static size_t format_pos = 0;
581 static bool log_overflow = false;
584 * Define all the debug class selection names here. Names *MUST NOT* contain
585 * white space. There must be one name for each DBGC_<class name>, and they
586 * must be in the table in the order of DBGC_<class name>..
589 static char **classname_table = NULL;
592 /* -------------------------------------------------------------------------- **
596 static void debug_init(void);
598 /***************************************************************************
599 Free memory pointed to by global pointers.
600 ****************************************************************************/
602 void gfree_debugsyms(void)
606 TALLOC_FREE(classname_table);
608 if ( DEBUGLEVEL_CLASS != debug_class_list_initial ) {
609 TALLOC_FREE( DEBUGLEVEL_CLASS );
610 DEBUGLEVEL_CLASS = discard_const_p(int, debug_class_list_initial);
613 debug_num_classes = 0;
615 state.initialized = false;
617 for (i = 0; i < ARRAY_SIZE(debug_backends); i++) {
618 SAFE_FREE(debug_backends[i].option);
622 /****************************************************************************
623 utility lists registered debug class names's
624 ****************************************************************************/
626 char *debug_list_class_names_and_levels(void)
630 /* prepare strings */
631 for (i = 0; i < debug_num_classes; i++) {
632 buf = talloc_asprintf_append(buf,
636 i == (debug_num_classes - 1) ? "\n" : " ");
644 /****************************************************************************
645 Utility to translate names to debug class index's (internal version).
646 ****************************************************************************/
648 static int debug_lookup_classname_int(const char* classname)
652 if (!classname) return -1;
654 for (i=0; i < debug_num_classes; i++) {
655 if (strcmp(classname, classname_table[i])==0)
661 /****************************************************************************
662 Add a new debug class to the system.
663 ****************************************************************************/
665 int debug_add_class(const char *classname)
669 char **new_name_list;
675 /* check the init has yet been called */
678 ndx = debug_lookup_classname_int(classname);
681 ndx = debug_num_classes;
683 if (DEBUGLEVEL_CLASS == debug_class_list_initial) {
684 /* Initial loading... */
685 new_class_list = NULL;
687 new_class_list = DEBUGLEVEL_CLASS;
690 default_level = DEBUGLEVEL_CLASS[DBGC_ALL];
692 new_class_list = talloc_realloc(NULL, new_class_list, int, ndx + 1);
695 DEBUGLEVEL_CLASS = new_class_list;
697 DEBUGLEVEL_CLASS[ndx] = default_level;
699 new_name_list = talloc_realloc(NULL, classname_table, char *, ndx + 1);
702 classname_table = new_name_list;
704 classname_table[ndx] = talloc_strdup(classname_table, classname);
705 if (! classname_table[ndx])
708 debug_num_classes = ndx + 1;
713 /****************************************************************************
714 Utility to translate names to debug class index's (public version).
715 ****************************************************************************/
717 static int debug_lookup_classname(const char *classname)
721 if (!classname || !*classname)
724 ndx = debug_lookup_classname_int(classname);
729 DEBUG(0, ("debug_lookup_classname(%s): Unknown class\n",
731 return debug_add_class(classname);
734 /****************************************************************************
735 Dump the current registered debug levels.
736 ****************************************************************************/
738 static void debug_dump_status(int level)
742 DEBUG(level, ("INFO: Current debug levels:\n"));
743 for (q = 0; q < debug_num_classes; q++) {
744 const char *classname = classname_table[q];
745 DEBUGADD(level, (" %s: %d\n",
747 DEBUGLEVEL_CLASS[q]));
751 static bool debug_parse_param(char *param)
755 char *saveptr = NULL;
758 class_name = strtok_r(param, ":", &saveptr);
759 if (class_name == NULL) {
763 class_level = strtok_r(NULL, "\0", &saveptr);
764 if (class_level == NULL) {
768 ndx = debug_lookup_classname(class_name);
773 DEBUGLEVEL_CLASS[ndx] = atoi(class_level);
778 /****************************************************************************
779 Parse the debug levels from smb.conf. Example debug level string:
780 3 tdb:5 printdrivers:7
781 Note: the 1st param has no "name:" preceeding it.
782 ****************************************************************************/
784 bool debug_parse_levels(const char *params_str)
786 size_t str_len = strlen(params_str);
794 memcpy(str, params_str, str_len+1);
796 tok = strtok_r(str, LIST_SEP, &saveptr);
801 /* Allow DBGC_ALL to be specified w/o requiring its class name e.g."10"
802 * v.s. "all:10", this is the traditional way to set DEBUGLEVEL
804 if (isdigit(tok[0])) {
805 DEBUGLEVEL_CLASS[DBGC_ALL] = atoi(tok);
806 tok = strtok_r(NULL, LIST_SEP, &saveptr);
808 DEBUGLEVEL_CLASS[DBGC_ALL] = 0;
811 /* Array is debug_num_classes long */
812 for (i = DBGC_ALL+1; i < debug_num_classes; i++) {
813 DEBUGLEVEL_CLASS[i] = DEBUGLEVEL_CLASS[DBGC_ALL];
816 while (tok != NULL) {
819 ok = debug_parse_param(tok);
821 DEBUG(0,("debug_parse_params: unrecognized debug "
822 "class name or format [%s]\n", tok));
826 tok = strtok_r(NULL, LIST_SEP, &saveptr);
829 debug_dump_status(5);
834 /* setup for logging of talloc warnings */
835 static void talloc_log_fn(const char *msg)
837 DEBUG(0,("%s", msg));
840 void debug_setup_talloc_log(void)
842 talloc_set_log_fn(talloc_log_fn);
846 /****************************************************************************
847 Init debugging (one time stuff)
848 ****************************************************************************/
850 static void debug_init(void)
854 if (state.initialized)
857 state.initialized = true;
859 debug_setup_talloc_log();
861 for (i = 0; i < ARRAY_SIZE(default_classname_table); i++) {
862 debug_add_class(default_classname_table[i]);
865 for (i = 0; i < ARRAY_SIZE(debug_backends); i++) {
866 debug_backends[i].log_level = -1;
867 debug_backends[i].new_log_level = -1;
871 void debug_set_settings(struct debug_settings *settings,
872 const char *logging_param,
873 int syslog_level, bool syslog_only)
875 char fake_param[256];
879 * This forces in some smb.conf derived values into the debug
880 * system. There are no pointers in this structure, so we can
881 * just structure-assign it in
883 state.settings = *settings;
886 * If 'logging' is not set, create backend settings from
887 * deprecated 'syslog' and 'syslog only' parameters
889 if (logging_param != NULL) {
890 len = strlen(logging_param);
894 snprintf(fake_param, sizeof(fake_param),
895 "syslog@%d", syslog_level - 1);
897 snprintf(fake_param, sizeof(fake_param),
898 "syslog@%d file@%d", syslog_level -1,
902 logging_param = fake_param;
905 debug_set_backends(logging_param);
909 control the name of the logfile and whether logging will be to stdout, stderr
910 or a file, and set up syslog
912 new_log indicates the destination for the debug log (an enum in
913 order of precedence - once set to DEBUG_FILE, it is not possible to
914 reset to DEBUG_STDOUT for example. This makes it easy to override
915 for debug to stderr on the command line, as the smb.conf cannot
916 reset it back to file-based logging
918 void setup_logging(const char *prog_name, enum debug_logtype new_logtype)
921 if (state.logtype < new_logtype) {
922 state.logtype = new_logtype;
925 const char *p = strrchr(prog_name, '/');
931 state.prog_name = prog_name;
933 reopen_logs_internal();
936 /***************************************************************************
937 Set the logfile name.
938 **************************************************************************/
940 void debug_set_logfile(const char *name)
942 if (name == NULL || *name == 0) {
943 /* this copes with calls when smb.conf is not loaded yet */
946 TALLOC_FREE(state.debugf);
947 state.debugf = talloc_strdup(NULL, name);
950 static void debug_close_fd(int fd)
957 bool debug_get_output_is_stderr(void)
959 return (state.logtype == DEBUG_DEFAULT_STDERR) || (state.logtype == DEBUG_STDERR);
962 bool debug_get_output_is_stdout(void)
964 return (state.logtype == DEBUG_DEFAULT_STDOUT) || (state.logtype == DEBUG_STDOUT);
967 void debug_set_callback(void *private_ptr, debug_callback_fn fn)
971 state.logtype = DEBUG_CALLBACK;
972 state.callback_private = private_ptr;
975 state.logtype = DEBUG_DEFAULT_STDERR;
976 state.callback_private = NULL;
977 state.callback = NULL;
981 static void debug_callback_log(const char *msg, int msg_level)
983 size_t msg_len = strlen(msg);
984 char msg_copy[msg_len];
986 if ((msg_len > 0) && (msg[msg_len-1] == '\n')) {
987 memcpy(msg_copy, msg, msg_len-1);
988 msg_copy[msg_len-1] = '\0';
992 state.callback(state.callback_private, msg_level, msg);
995 /**************************************************************************
997 note that we now do this unconditionally
998 We attempt to open the new debug fp before closing the old. This means
999 if we run out of fd's we just keep using the old fd rather than aborting.
1000 Fix from dgibson@linuxcare.com.
1001 **************************************************************************/
1004 reopen the log file (usually called because the log file name might have changed)
1006 bool reopen_logs_internal(void)
1013 if (state.reopening_logs) {
1017 /* Now clear the SIGHUP induced flag */
1018 state.schedule_reopen_logs = false;
1020 switch (state.logtype) {
1021 case DEBUG_CALLBACK:
1024 case DEBUG_DEFAULT_STDOUT:
1025 debug_close_fd(state.fd);
1029 case DEBUG_DEFAULT_STDERR:
1031 debug_close_fd(state.fd);
1039 oldumask = umask( 022 );
1041 if (!state.debugf) {
1045 state.reopening_logs = true;
1047 new_fd = open( state.debugf, O_WRONLY|O_APPEND|O_CREAT, 0644);
1050 log_overflow = true;
1051 DEBUG(0, ("Unable to open new log file '%s': %s\n", state.debugf, strerror(errno)));
1052 log_overflow = false;
1055 smb_set_close_on_exec(new_fd);
1058 debug_close_fd(old_fd);
1061 /* Fix from klausr@ITAP.Physik.Uni-Stuttgart.De
1062 * to fix problem where smbd's that generate less
1063 * than 100 messages keep growing the log.
1065 force_check_log_size();
1066 (void)umask(oldumask);
1068 /* Take over stderr to catch output into logs */
1070 if (dup2(state.fd, 2) == -1) {
1071 /* Close stderr too, if dup2 can't point it -
1072 at the logfile. There really isn't much
1073 that can be done on such a fundamental
1079 state.reopening_logs = false;
1084 /**************************************************************************
1085 Force a check of the log size.
1086 ***************************************************************************/
1088 void force_check_log_size( void )
1093 _PUBLIC_ void debug_schedule_reopen_logs(void)
1095 state.schedule_reopen_logs = true;
1099 /***************************************************************************
1100 Check to see if there is any need to check if the logfile has grown too big.
1101 **************************************************************************/
1103 bool need_to_check_log_size( void )
1107 if( debug_count < 100)
1110 maxlog = state.settings.max_log_size * 1024;
1111 if ( state.fd <=2 || maxlog <= 0 ) {
1118 /**************************************************************************
1119 Check to see if the log has grown to be too big.
1120 **************************************************************************/
1122 void check_log_size( void )
1128 * We need to be root to check/change log-file, skip this and let the main
1129 * loop check do a new check as root.
1132 #if _SAMBA_BUILD_ == 3
1133 if (geteuid() != sec_initial_uid())
1138 /* We don't check sec_initial_uid() here as it isn't
1139 * available in common code and we don't generally
1140 * want to rotate and the possibly lose logs in
1141 * make test or the build farm */
1145 if(log_overflow || (!state.schedule_reopen_logs && !need_to_check_log_size())) {
1149 maxlog = state.settings.max_log_size * 1024;
1151 if (state.schedule_reopen_logs) {
1152 (void)reopen_logs_internal();
1155 if (maxlog && (fstat(state.fd, &st) == 0
1156 && st.st_size > maxlog )) {
1157 (void)reopen_logs_internal();
1158 if (state.fd > 2 && (fstat(state.fd, &st) == 0
1159 && st.st_size > maxlog)) {
1160 char name[strlen(state.debugf) + 5];
1162 snprintf(name, sizeof(name), "%s.old", state.debugf);
1164 (void)rename(state.debugf, name);
1166 if (!reopen_logs_internal()) {
1167 /* We failed to reopen a log - continue using the old name. */
1168 (void)rename(name, state.debugf);
1174 * Here's where we need to panic if state.fd == 0 or -1 (invalid values)
1177 if (state.fd <= 0) {
1178 /* This code should only be reached in very strange
1179 * circumstances. If we merely fail to open the new log we
1180 * should stick with the old one. ergo this should only be
1181 * reached when opening the logs for the first time: at
1182 * startup or when the log level is increased from zero.
1185 int fd = open( "/dev/console", O_WRONLY, 0);
1187 smb_set_close_on_exec(fd);
1189 DEBUG(0,("check_log_size: open of debug file %s failed - using console.\n",
1193 * We cannot continue without a debug file handle.
1201 /*************************************************************************
1202 Write an debug message on the debugfile.
1203 This is called by dbghdr() and format_debug_text().
1204 ************************************************************************/
1206 static void Debug1(const char *msg)
1208 int old_errno = errno;
1212 switch(state.logtype) {
1213 case DEBUG_CALLBACK:
1214 debug_callback_log(msg, current_msg_level);
1218 case DEBUG_DEFAULT_STDOUT:
1219 case DEBUG_DEFAULT_STDERR:
1223 ret = write(state.fd, msg, strlen(msg));
1224 } while (ret == -1 && errno == EINTR);
1228 debug_backends_log(msg, current_msg_level);
1235 /**************************************************************************
1236 Print the buffer content via Debug1(), then reset the buffer.
1239 ****************************************************************************/
1241 static void bufr_print( void )
1243 format_bufr[format_pos] = '\0';
1244 (void)Debug1(format_bufr);
1248 /***************************************************************************
1249 Format the debug message text.
1251 Input: msg - Text to be added to the "current" debug message text.
1255 Notes: The purpose of this is two-fold. First, each call to syslog()
1256 (used by Debug1(), see above) generates a new line of syslog
1257 output. This is fixed by storing the partial lines until the
1258 newline character is encountered. Second, printing the debug
1259 message lines when a newline is encountered allows us to add
1260 spaces, thus indenting the body of the message and making it
1262 **************************************************************************/
1264 static void format_debug_text( const char *msg )
1267 bool timestamp = (state.logtype == DEBUG_FILE && (state.settings.timestamp_logs));
1271 for( i = 0; msg[i]; i++ ) {
1272 /* Indent two spaces at each new line. */
1273 if(timestamp && 0 == format_pos) {
1274 format_bufr[0] = format_bufr[1] = ' ';
1278 /* If there's room, copy the character to the format buffer. */
1279 if (format_pos < FORMAT_BUFR_SIZE - 1)
1280 format_bufr[format_pos++] = msg[i];
1282 /* If a newline is encountered, print & restart. */
1283 if( '\n' == msg[i] )
1286 /* If the buffer is full dump it out, reset it, and put out a line
1287 * continuation indicator.
1289 if (format_pos >= FORMAT_BUFR_SIZE - 1) {
1291 (void)Debug1( " +>\n" );
1295 /* Just to be safe... */
1296 format_bufr[format_pos] = '\0';
1299 /***************************************************************************
1300 Flush debug output, including the format buffer content.
1304 ***************************************************************************/
1306 void dbgflush( void )
1311 /***************************************************************************
1312 Print a Debug Header.
1314 Input: level - Debug level of the message (not the system-wide debug
1316 cls - Debuglevel class of the calling module.
1317 location - Pointer to a string containing the name of the file
1318 from which this function was called, or an empty string
1319 if the __FILE__ macro is not implemented.
1320 func - Pointer to a string containing the name of the function
1321 from which this function was called, or an empty string
1322 if the __FUNCTION__ macro is not implemented.
1324 Output: Always true. This makes it easy to fudge a call to dbghdr()
1325 in a macro, since the function can be called as part of a test.
1326 Eg: ( (level <= DEBUGLEVEL) && (dbghdr(level,"",line)) )
1328 Notes: This function takes care of setting current_msg_level.
1330 ****************************************************************************/
1332 bool dbghdrclass(int level, int cls, const char *location, const char *func)
1334 /* Ensure we don't lose any real errno value. */
1335 int old_errno = errno;
1336 bool verbose = false;
1337 char header_str[300];
1340 struct timeval_buf tvbuf;
1343 /* This is a fudge. If there is stuff sitting in the format_bufr, then
1344 * the *right* thing to do is to call
1345 * format_debug_text( "\n" );
1346 * to write the remainder, and then proceed with the new header.
1347 * Unfortunately, there are several places in the code at which
1348 * the DEBUG() macro is used to build partial lines. That in mind,
1349 * we'll work under the assumption that an incomplete line indicates
1350 * that a new header is *not* desired.
1355 /* Set current_msg_level. */
1356 current_msg_level = level;
1358 /* Don't print a header if we're logging to stdout. */
1359 if ( state.logtype != DEBUG_FILE ) {
1363 /* Print the header if timestamps are turned on. If parameters are
1364 * not yet loaded, then default to timestamps on.
1366 if (!(state.settings.timestamp_logs ||
1367 state.settings.debug_prefix_timestamp)) {
1372 timeval_str_buf(&tv, false, state.settings.debug_hires_timestamp,
1375 hs_len = snprintf(header_str, sizeof(header_str), "[%s, %2d",
1377 if (hs_len >= sizeof(header_str)) {
1381 if (unlikely(DEBUGLEVEL_CLASS[ cls ] >= 10)) {
1385 if (verbose || state.settings.debug_pid) {
1387 header_str + hs_len, sizeof(header_str) - hs_len,
1388 ", pid=%u", (unsigned int)getpid());
1389 if (hs_len >= sizeof(header_str)) {
1394 if (verbose || state.settings.debug_uid) {
1396 header_str + hs_len, sizeof(header_str) - hs_len,
1397 ", effective(%u, %u), real(%u, %u)",
1398 (unsigned int)geteuid(), (unsigned int)getegid(),
1399 (unsigned int)getuid(), (unsigned int)getgid());
1400 if (hs_len >= sizeof(header_str)) {
1405 if ((verbose || state.settings.debug_class)
1406 && (cls != DBGC_ALL)) {
1408 header_str + hs_len, sizeof(header_str) - hs_len,
1409 ", class=%s", classname_table[cls]);
1410 if (hs_len >= sizeof(header_str)) {
1416 * No +=, see man man strlcat
1418 hs_len = strlcat(header_str, "] ", sizeof(header_str));
1419 if (hs_len >= sizeof(header_str)) {
1423 if (!state.settings.debug_prefix_timestamp) {
1425 header_str + hs_len, sizeof(header_str) - hs_len,
1426 "%s(%s)\n", location, func);
1427 if (hs_len >= sizeof(header_str)) {
1433 (void)Debug1(header_str);
1439 /***************************************************************************
1440 Add text to the body of the "current" debug message via the format buffer.
1442 Input: format_str - Format string, as used in printf(), et. al.
1443 ... - Variable argument list.
1445 ..or.. va_alist - Old style variable parameter list starting point.
1447 Output: Always true. See dbghdr() for more info, though this is not
1448 likely to be used in the same way.
1450 ***************************************************************************/
1452 static inline bool __dbgtext_va(const char *format_str, va_list ap) PRINTF_ATTRIBUTE(1,0);
1453 static inline bool __dbgtext_va(const char *format_str, va_list ap)
1455 char *msgbuf = NULL;
1459 res = vasprintf(&msgbuf, format_str, ap);
1461 format_debug_text(msgbuf);
1469 bool dbgtext_va(const char *format_str, va_list ap)
1471 return __dbgtext_va(format_str, ap);
1474 bool dbgtext(const char *format_str, ... )
1479 va_start(ap, format_str);
1480 ret = __dbgtext_va(format_str, ap);