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 static const char *default_classname_table[] = {
109 [DBGC_PRINTDRIVERS] = "printdrivers",
110 [DBGC_LANMAN] = "lanman",
112 [DBGC_RPC_PARSE] = "rpc_parse",
113 [DBGC_RPC_SRV] = "rpc_srv",
114 [DBGC_RPC_CLI] = "rpc_cli",
115 [DBGC_PASSDB] = "passdb",
117 [DBGC_AUTH] = "auth",
118 [DBGC_WINBIND] = "winbind",
120 [DBGC_IDMAP] = "idmap",
121 [DBGC_QUOTA] = "quota",
122 [DBGC_ACLS] = "acls",
123 [DBGC_LOCKING] = "locking",
124 [DBGC_MSDFS] = "msdfs",
125 [DBGC_DMAPI] = "dmapi",
126 [DBGC_REGISTRY] = "registry",
127 [DBGC_SCAVENGER] = "scavenger",
130 [DBGC_TEVENT] = "tevent",
131 [DBGC_AUTH_AUDIT] = "auth_audit",
132 [DBGC_AUTH_AUDIT_JSON] = "auth_json_audit",
133 [DBGC_KERBEROS] = "kerberos",
134 [DBGC_DRS_REPL] = "drs_repl",
135 [DBGC_SMB2] = "smb2",
136 [DBGC_SMB2_CREDITS] = "smb2_credits",
137 [DBGC_DSDB_AUDIT] = "dsdb_audit",
138 [DBGC_DSDB_AUDIT_JSON] = "dsdb_json_audit",
139 [DBGC_DSDB_PWD_AUDIT] = "dsdb_password_audit",
140 [DBGC_DSDB_PWD_AUDIT_JSON] = "dsdb_password_json_audit",
141 [DBGC_DSDB_TXN_AUDIT] = "dsdb_transaction_audit",
142 [DBGC_DSDB_TXN_AUDIT_JSON] = "dsdb_transaction_json_audit",
143 [DBGC_DSDB_GROUP_AUDIT] = "dsdb_group_audit",
144 [DBGC_DSDB_GROUP_AUDIT_JSON] = "dsdb_group_json_audit",
148 * This is to allow reading of dbgc_config before the debug
149 * system has been initialized.
151 static int debug_class_list_initial[ARRAY_SIZE(default_classname_table)];
153 static size_t debug_num_classes = 0;
154 static int *dbgc_config = debug_class_list_initial;
156 static int current_msg_level = 0;
158 #if defined(WITH_SYSLOG) || defined(HAVE_LIBSYSTEMD_JOURNAL) || defined(HAVE_LIBSYSTEMD)
159 static int debug_level_to_priority(int level)
162 * map debug levels to syslog() priorities
164 static const int priority_map[] = {
178 if( level >= ARRAY_SIZE(priority_map) || level < 0)
179 priority = LOG_DEBUG;
181 priority = priority_map[level];
187 /* -------------------------------------------------------------------------- **
188 * Debug backends. When logging to DEBUG_FILE, send the log entries to
189 * all active backends.
192 static void debug_file_log(int msg_level,
193 const char *msg, const char *msg_no_nl)
199 ret = write(state.fd, msg, strlen(msg));
200 } while (ret == -1 && errno == EINTR);
204 static void debug_syslog_reload(bool enabled, bool previously_enabled,
205 const char *prog_name, char *option)
207 if (enabled && !previously_enabled) {
209 openlog(prog_name, LOG_PID, SYSLOG_FACILITY);
211 /* for old systems that have no facility codes. */
212 openlog(prog_name, LOG_PID );
217 if (!enabled && previously_enabled) {
222 static void debug_syslog_log(int msg_level,
223 const char *msg, const char *msg_no_nl)
227 priority = debug_level_to_priority(msg_level);
230 * Specify the facility to interoperate with other syslog
231 * callers (vfs_full_audit for example).
233 priority |= SYSLOG_FACILITY;
235 syslog(priority, "%s", msg);
237 #endif /* WITH_SYSLOG */
239 #if defined(HAVE_LIBSYSTEMD_JOURNAL) || defined(HAVE_LIBSYSTEMD)
240 #include <systemd/sd-journal.h>
241 static void debug_systemd_log(int msg_level,
242 const char *msg, const char *msg_no_nl)
244 sd_journal_send("MESSAGE=%s", msg_no_nl,
245 "PRIORITY=%d", debug_level_to_priority(msg_level),
246 "LEVEL=%d", msg_level,
251 #ifdef HAVE_LTTNG_TRACEF
252 #include <lttng/tracef.h>
253 static void debug_lttng_log(int msg_level,
254 const char *msg, const char *msg_no_nl)
258 #endif /* WITH_LTTNG_TRACEF */
261 #include "gpfswrap.h"
262 static void debug_gpfs_reload(bool enabled, bool previously_enabled,
263 const char *prog_name, char *option)
267 if (enabled && !previously_enabled) {
268 gpfswrap_init_trace();
272 if (!enabled && previously_enabled) {
273 gpfswrap_fini_trace();
279 * Trigger GPFS library to adjust state if necessary.
281 gpfswrap_query_trace();
285 static void debug_gpfs_log(int msg_level,
286 const char *msg, const char *msg_no_nl)
288 gpfswrap_add_trace(msg_level, msg_no_nl);
290 #endif /* HAVE_GPFS */
292 #define DEBUG_RINGBUF_SIZE (1024 * 1024)
293 #define DEBUG_RINGBUF_SIZE_OPT "size="
295 static char *debug_ringbuf;
296 static size_t debug_ringbuf_size;
297 static size_t debug_ringbuf_ofs;
299 /* We ensure in debug_ringbuf_log() that this is always \0 terminated */
300 char *debug_get_ringbuf(void)
302 return debug_ringbuf;
305 /* Return the size of the ringbuf (including a \0 terminator) */
306 size_t debug_get_ringbuf_size(void)
308 return debug_ringbuf_size;
311 static void debug_ringbuf_reload(bool enabled, bool previously_enabled,
312 const char *prog_name, char *option)
315 size_t optlen = strlen(DEBUG_RINGBUF_SIZE_OPT);
317 debug_ringbuf_size = DEBUG_RINGBUF_SIZE;
318 debug_ringbuf_ofs = 0;
320 SAFE_FREE(debug_ringbuf);
326 if (option != NULL) {
327 cmp = strncmp(option, DEBUG_RINGBUF_SIZE_OPT, optlen);
329 debug_ringbuf_size = (size_t)strtoull(
330 option + optlen, NULL, 10);
334 debug_ringbuf = calloc(debug_ringbuf_size, sizeof(char));
335 if (debug_ringbuf == NULL) {
340 static void debug_ringbuf_log(int msg_level,
342 const char *msg_no_nl)
344 size_t msglen = strlen(msg);
347 if (debug_ringbuf == NULL) {
351 /* Ensure the buffer is always \0 terminated */
352 allowed_size = debug_ringbuf_size - 1;
354 if (msglen > allowed_size) {
358 if ((debug_ringbuf_ofs + msglen) < debug_ringbuf_ofs) {
362 if ((debug_ringbuf_ofs + msglen) > allowed_size) {
363 debug_ringbuf_ofs = 0;
366 memcpy(debug_ringbuf + debug_ringbuf_ofs, msg, msglen);
367 debug_ringbuf_ofs += msglen;
370 static struct debug_backend {
374 void (*reload)(bool enabled, bool prev_enabled,
375 const char *prog_name, char *option);
376 void (*log)(int msg_level, const char *msg, const char *msg_no_nl);
378 } debug_backends[] = {
381 .log = debug_file_log,
386 .reload = debug_syslog_reload,
387 .log = debug_syslog_log,
391 #if defined(HAVE_LIBSYSTEMD_JOURNAL) || defined(HAVE_LIBSYSTEMD)
394 .log = debug_systemd_log,
398 #ifdef HAVE_LTTNG_TRACEF
401 .log = debug_lttng_log,
408 .reload = debug_gpfs_reload,
409 .log = debug_gpfs_log,
414 .log = debug_ringbuf_log,
415 .reload = debug_ringbuf_reload,
419 static struct debug_backend *debug_find_backend(const char *name)
423 for (i = 0; i < ARRAY_SIZE(debug_backends); i++) {
424 if (strcmp(name, debug_backends[i].name) == 0) {
425 return &debug_backends[i];
433 * parse "backend[:option][@loglevel]
435 static void debug_backend_parse_token(char *tok)
437 char *backend_name_option, *backend_name,*backend_level, *saveptr;
438 char *backend_option;
439 struct debug_backend *b;
442 * First parse into backend[:option] and loglevel
444 backend_name_option = strtok_r(tok, "@\0", &saveptr);
445 if (backend_name_option == NULL) {
449 backend_level = strtok_r(NULL, "\0", &saveptr);
452 * Now parse backend[:option]
454 backend_name = strtok_r(backend_name_option, ":\0", &saveptr);
455 if (backend_name == NULL) {
459 backend_option = strtok_r(NULL, "\0", &saveptr);
462 * Find and update backend
464 b = debug_find_backend(backend_name);
469 if (backend_level == NULL) {
470 b->new_log_level = MAX_DEBUG_LEVEL;
472 b->new_log_level = atoi(backend_level);
475 if (backend_option != NULL) {
476 b->option = strdup(backend_option);
477 if (b->option == NULL) {
484 * parse "backend1[:option1][@loglevel1] backend2[option2][@loglevel2] ... "
485 * and enable/disable backends accordingly
487 static void debug_set_backends(const char *param)
489 size_t str_len = strlen(param);
495 * initialize new_log_level to detect backends that have been
498 for (i = 0; i < ARRAY_SIZE(debug_backends); i++) {
499 SAFE_FREE(debug_backends[i].option);
500 debug_backends[i].new_log_level = -1;
503 memcpy(str, param, str_len + 1);
505 tok = strtok_r(str, LIST_SEP, &saveptr);
510 while (tok != NULL) {
511 debug_backend_parse_token(tok);
512 tok = strtok_r(NULL, LIST_SEP, &saveptr);
516 * Let backends react to config changes
518 for (i = 0; i < ARRAY_SIZE(debug_backends); i++) {
519 struct debug_backend *b = &debug_backends[i];
522 bool enabled = b->new_log_level > -1;
523 bool previously_enabled = b->log_level > -1;
525 b->reload(enabled, previously_enabled, state.prog_name,
528 b->log_level = b->new_log_level;
532 static void debug_backends_log(const char *msg, int msg_level)
534 char msg_no_nl[FORMAT_BUFR_SIZE];
539 * Some backends already add an extra newline, so also provide
540 * a buffer without the newline character.
542 len = MIN(strlen(msg), FORMAT_BUFR_SIZE - 1);
543 if ((len > 0) && (msg[len - 1] == '\n')) {
547 memcpy(msg_no_nl, msg, len);
548 msg_no_nl[len] = '\0';
550 for (i = 0; i < ARRAY_SIZE(debug_backends); i++) {
551 if (msg_level <= debug_backends[i].log_level) {
552 debug_backends[i].log(msg_level, msg, msg_no_nl);
557 /* -------------------------------------------------------------------------- **
558 * External variables.
562 used to check if the user specified a
563 logfile on the command line
565 bool override_logfile;
567 int debuglevel_get_class(size_t idx)
569 return dbgc_config[idx];
572 void debuglevel_set_class(size_t idx, int level)
574 dbgc_config[idx] = level;
578 /* -------------------------------------------------------------------------- **
579 * Internal variables.
581 * debug_count - Number of debug messages that have been output.
582 * Used to check log size.
584 * current_msg_level - Internal copy of the message debug level. Written by
585 * dbghdr() and read by Debug1().
587 * format_bufr - Used to format debug messages. The dbgtext() function
588 * prints debug messages to a string, and then passes the
589 * string to format_debug_text(), which uses format_bufr
590 * to build the formatted output.
592 * format_pos - Marks the first free byte of the format_bufr.
595 * log_overflow - When this variable is true, never attempt to check the
596 * size of the log. This is a hack, so that we can write
597 * a message using DEBUG, from open_logs() when we
598 * are unable to open a new log file for some reason.
601 static int debug_count = 0;
602 static char format_bufr[FORMAT_BUFR_SIZE];
603 static size_t format_pos = 0;
604 static bool log_overflow = false;
607 * Define all the debug class selection names here. Names *MUST NOT* contain
608 * white space. There must be one name for each DBGC_<class name>, and they
609 * must be in the table in the order of DBGC_<class name>..
612 static char **classname_table = NULL;
615 /* -------------------------------------------------------------------------- **
619 static void debug_init(void);
621 /***************************************************************************
622 Free memory pointed to by global pointers.
623 ****************************************************************************/
625 void gfree_debugsyms(void)
629 TALLOC_FREE(classname_table);
631 if ( dbgc_config != debug_class_list_initial ) {
632 TALLOC_FREE( dbgc_config );
633 dbgc_config = discard_const_p(int, debug_class_list_initial);
636 debug_num_classes = 0;
638 state.initialized = false;
640 for (i = 0; i < ARRAY_SIZE(debug_backends); i++) {
641 SAFE_FREE(debug_backends[i].option);
645 /****************************************************************************
646 utility lists registered debug class names's
647 ****************************************************************************/
649 char *debug_list_class_names_and_levels(void)
653 /* prepare strings */
654 for (i = 0; i < debug_num_classes; i++) {
655 buf = talloc_asprintf_append(buf,
659 i == (debug_num_classes - 1) ? "\n" : " ");
667 /****************************************************************************
668 Utility to translate names to debug class index's (internal version).
669 ****************************************************************************/
671 static int debug_lookup_classname_int(const char* classname)
675 if (!classname) return -1;
677 for (i=0; i < debug_num_classes; i++) {
678 if (strcmp(classname, classname_table[i])==0)
684 /****************************************************************************
685 Add a new debug class to the system.
686 ****************************************************************************/
688 int debug_add_class(const char *classname)
692 char **new_name_list;
695 if (classname == NULL) {
699 /* check the init has yet been called */
702 ndx = debug_lookup_classname_int(classname);
706 ndx = debug_num_classes;
708 if (dbgc_config == debug_class_list_initial) {
709 /* Initial loading... */
710 new_class_list = NULL;
712 new_class_list = dbgc_config;
715 default_level = dbgc_config[DBGC_ALL];
717 new_class_list = talloc_realloc(NULL, new_class_list, int, ndx + 1);
718 if (new_class_list == NULL) {
722 dbgc_config = new_class_list;
724 dbgc_config[ndx] = default_level;
726 new_name_list = talloc_realloc(NULL, classname_table, char *, ndx + 1);
727 if (new_name_list == NULL) {
730 classname_table = new_name_list;
732 classname_table[ndx] = talloc_strdup(classname_table, classname);
733 if (classname_table[ndx] == NULL) {
737 debug_num_classes = ndx + 1;
742 /****************************************************************************
743 Utility to translate names to debug class index's (public version).
744 ****************************************************************************/
746 static int debug_lookup_classname(const char *classname)
750 if (!classname || !*classname)
753 ndx = debug_lookup_classname_int(classname);
758 DEBUG(0, ("debug_lookup_classname(%s): Unknown class\n",
760 return debug_add_class(classname);
763 /****************************************************************************
764 Dump the current registered debug levels.
765 ****************************************************************************/
767 static void debug_dump_status(int level)
771 DEBUG(level, ("INFO: Current debug levels:\n"));
772 for (q = 0; q < debug_num_classes; q++) {
773 const char *classname = classname_table[q];
774 DEBUGADD(level, (" %s: %d\n",
780 static bool debug_parse_param(char *param)
784 char *saveptr = NULL;
787 class_name = strtok_r(param, ":", &saveptr);
788 if (class_name == NULL) {
792 class_level = strtok_r(NULL, "\0", &saveptr);
793 if (class_level == NULL) {
797 ndx = debug_lookup_classname(class_name);
802 dbgc_config[ndx] = atoi(class_level);
807 /****************************************************************************
808 Parse the debug levels from smb.conf. Example debug level string:
809 3 tdb:5 printdrivers:7
810 Note: the 1st param has no "name:" preceeding it.
811 ****************************************************************************/
813 bool debug_parse_levels(const char *params_str)
815 size_t str_len = strlen(params_str);
823 memcpy(str, params_str, str_len+1);
825 tok = strtok_r(str, LIST_SEP, &saveptr);
830 /* Allow DBGC_ALL to be specified w/o requiring its class name e.g."10"
831 * v.s. "all:10", this is the traditional way to set DEBUGLEVEL
833 if (isdigit(tok[0])) {
834 dbgc_config[DBGC_ALL] = atoi(tok);
835 tok = strtok_r(NULL, LIST_SEP, &saveptr);
837 dbgc_config[DBGC_ALL] = 0;
840 /* Array is debug_num_classes long */
841 for (i = DBGC_ALL+1; i < debug_num_classes; i++) {
842 dbgc_config[i] = dbgc_config[DBGC_ALL];
845 while (tok != NULL) {
848 ok = debug_parse_param(tok);
850 DEBUG(0,("debug_parse_params: unrecognized debug "
851 "class name or format [%s]\n", tok));
855 tok = strtok_r(NULL, LIST_SEP, &saveptr);
858 debug_dump_status(5);
863 /* setup for logging of talloc warnings */
864 static void talloc_log_fn(const char *msg)
866 DEBUG(0,("%s", msg));
869 void debug_setup_talloc_log(void)
871 talloc_set_log_fn(talloc_log_fn);
875 /****************************************************************************
876 Init debugging (one time stuff)
877 ****************************************************************************/
879 static void debug_init(void)
883 if (state.initialized)
886 state.initialized = true;
888 debug_setup_talloc_log();
890 for (i = 0; i < ARRAY_SIZE(default_classname_table); i++) {
891 debug_add_class(default_classname_table[i]);
894 for (i = 0; i < ARRAY_SIZE(debug_backends); i++) {
895 debug_backends[i].log_level = -1;
896 debug_backends[i].new_log_level = -1;
900 void debug_set_settings(struct debug_settings *settings,
901 const char *logging_param,
902 int syslog_level, bool syslog_only)
904 char fake_param[256];
908 * This forces in some smb.conf derived values into the debug
909 * system. There are no pointers in this structure, so we can
910 * just structure-assign it in
912 state.settings = *settings;
915 * If 'logging' is not set, create backend settings from
916 * deprecated 'syslog' and 'syslog only' parameters
918 if (logging_param != NULL) {
919 len = strlen(logging_param);
923 snprintf(fake_param, sizeof(fake_param),
924 "syslog@%d", syslog_level - 1);
926 snprintf(fake_param, sizeof(fake_param),
927 "syslog@%d file@%d", syslog_level -1,
931 logging_param = fake_param;
934 debug_set_backends(logging_param);
938 control the name of the logfile and whether logging will be to stdout, stderr
939 or a file, and set up syslog
941 new_log indicates the destination for the debug log (an enum in
942 order of precedence - once set to DEBUG_FILE, it is not possible to
943 reset to DEBUG_STDOUT for example. This makes it easy to override
944 for debug to stderr on the command line, as the smb.conf cannot
945 reset it back to file-based logging
947 void setup_logging(const char *prog_name, enum debug_logtype new_logtype)
950 if (state.logtype < new_logtype) {
951 state.logtype = new_logtype;
954 const char *p = strrchr(prog_name, '/');
960 state.prog_name = prog_name;
962 reopen_logs_internal();
965 /***************************************************************************
966 Set the logfile name.
967 **************************************************************************/
969 void debug_set_logfile(const char *name)
971 if (name == NULL || *name == 0) {
972 /* this copes with calls when smb.conf is not loaded yet */
975 TALLOC_FREE(state.debugf);
976 state.debugf = talloc_strdup(NULL, name);
979 static void debug_close_fd(int fd)
986 bool debug_get_output_is_stderr(void)
988 return (state.logtype == DEBUG_DEFAULT_STDERR) || (state.logtype == DEBUG_STDERR);
991 bool debug_get_output_is_stdout(void)
993 return (state.logtype == DEBUG_DEFAULT_STDOUT) || (state.logtype == DEBUG_STDOUT);
996 void debug_set_callback(void *private_ptr, debug_callback_fn fn)
1000 state.logtype = DEBUG_CALLBACK;
1001 state.callback_private = private_ptr;
1002 state.callback = fn;
1004 state.logtype = DEBUG_DEFAULT_STDERR;
1005 state.callback_private = NULL;
1006 state.callback = NULL;
1010 static void debug_callback_log(const char *msg, int msg_level)
1012 size_t msg_len = strlen(msg);
1013 char msg_copy[msg_len];
1015 if ((msg_len > 0) && (msg[msg_len-1] == '\n')) {
1016 memcpy(msg_copy, msg, msg_len-1);
1017 msg_copy[msg_len-1] = '\0';
1021 state.callback(state.callback_private, msg_level, msg);
1024 /**************************************************************************
1025 reopen the log files
1026 note that we now do this unconditionally
1027 We attempt to open the new debug fp before closing the old. This means
1028 if we run out of fd's we just keep using the old fd rather than aborting.
1029 Fix from dgibson@linuxcare.com.
1030 **************************************************************************/
1033 reopen the log file (usually called because the log file name might have changed)
1035 bool reopen_logs_internal(void)
1042 if (state.reopening_logs) {
1046 /* Now clear the SIGHUP induced flag */
1047 state.schedule_reopen_logs = false;
1049 switch (state.logtype) {
1050 case DEBUG_CALLBACK:
1053 case DEBUG_DEFAULT_STDOUT:
1054 debug_close_fd(state.fd);
1058 case DEBUG_DEFAULT_STDERR:
1060 debug_close_fd(state.fd);
1068 oldumask = umask( 022 );
1070 if (!state.debugf) {
1074 state.reopening_logs = true;
1076 new_fd = open( state.debugf, O_WRONLY|O_APPEND|O_CREAT, 0644);
1079 log_overflow = true;
1080 DEBUG(0, ("Unable to open new log file '%s': %s\n", state.debugf, strerror(errno)));
1081 log_overflow = false;
1084 smb_set_close_on_exec(new_fd);
1087 debug_close_fd(old_fd);
1090 /* Fix from klausr@ITAP.Physik.Uni-Stuttgart.De
1091 * to fix problem where smbd's that generate less
1092 * than 100 messages keep growing the log.
1094 force_check_log_size();
1095 (void)umask(oldumask);
1098 * If log file was opened or created successfully, take over stderr to
1099 * catch output into logs.
1102 if (dup2(state.fd, 2) == -1) {
1103 /* Close stderr too, if dup2 can't point it -
1104 at the logfile. There really isn't much
1105 that can be done on such a fundamental
1111 state.reopening_logs = false;
1116 /**************************************************************************
1117 Force a check of the log size.
1118 ***************************************************************************/
1120 void force_check_log_size( void )
1125 _PUBLIC_ void debug_schedule_reopen_logs(void)
1127 state.schedule_reopen_logs = true;
1131 /***************************************************************************
1132 Check to see if there is any need to check if the logfile has grown too big.
1133 **************************************************************************/
1135 bool need_to_check_log_size(void)
1139 if (debug_count < 100) {
1143 maxlog = state.settings.max_log_size * 1024;
1144 if (state.fd <= 2 || maxlog <= 0) {
1151 /**************************************************************************
1152 Check to see if the log has grown to be too big.
1153 **************************************************************************/
1155 void check_log_size( void )
1161 * We need to be root to check/change log-file, skip this and let the main
1162 * loop check do a new check as root.
1165 #if _SAMBA_BUILD_ == 3
1166 if (geteuid() != sec_initial_uid())
1171 /* We don't check sec_initial_uid() here as it isn't
1172 * available in common code and we don't generally
1173 * want to rotate and the possibly lose logs in
1174 * make test or the build farm */
1178 if(log_overflow || (!state.schedule_reopen_logs && !need_to_check_log_size())) {
1182 maxlog = state.settings.max_log_size * 1024;
1184 if (state.schedule_reopen_logs) {
1185 (void)reopen_logs_internal();
1188 if (maxlog && (fstat(state.fd, &st) == 0
1189 && st.st_size > maxlog )) {
1190 (void)reopen_logs_internal();
1191 if (state.fd > 2 && (fstat(state.fd, &st) == 0
1192 && st.st_size > maxlog)) {
1193 char name[strlen(state.debugf) + 5];
1195 snprintf(name, sizeof(name), "%s.old", state.debugf);
1197 (void)rename(state.debugf, name);
1199 if (!reopen_logs_internal()) {
1200 /* We failed to reopen a log - continue using the old name. */
1201 (void)rename(name, state.debugf);
1207 * Here's where we need to panic if state.fd == 0 or -1 (invalid values)
1210 if (state.fd <= 0) {
1211 /* This code should only be reached in very strange
1212 * circumstances. If we merely fail to open the new log we
1213 * should stick with the old one. ergo this should only be
1214 * reached when opening the logs for the first time: at
1215 * startup or when the log level is increased from zero.
1218 int fd = open( "/dev/console", O_WRONLY, 0);
1220 smb_set_close_on_exec(fd);
1222 DEBUG(0,("check_log_size: open of debug file %s failed - using console.\n",
1226 * We cannot continue without a debug file handle.
1234 /*************************************************************************
1235 Write an debug message on the debugfile.
1236 This is called by dbghdr() and format_debug_text().
1237 ************************************************************************/
1239 static void Debug1(const char *msg)
1241 int old_errno = errno;
1245 switch(state.logtype) {
1246 case DEBUG_CALLBACK:
1247 debug_callback_log(msg, current_msg_level);
1251 case DEBUG_DEFAULT_STDOUT:
1252 case DEBUG_DEFAULT_STDERR:
1256 ret = write(state.fd, msg, strlen(msg));
1257 } while (ret == -1 && errno == EINTR);
1261 debug_backends_log(msg, current_msg_level);
1268 /**************************************************************************
1269 Print the buffer content via Debug1(), then reset the buffer.
1272 ****************************************************************************/
1274 static void bufr_print( void )
1276 format_bufr[format_pos] = '\0';
1277 (void)Debug1(format_bufr);
1281 /***************************************************************************
1282 Format the debug message text.
1284 Input: msg - Text to be added to the "current" debug message text.
1288 Notes: The purpose of this is two-fold. First, each call to syslog()
1289 (used by Debug1(), see above) generates a new line of syslog
1290 output. This is fixed by storing the partial lines until the
1291 newline character is encountered. Second, printing the debug
1292 message lines when a newline is encountered allows us to add
1293 spaces, thus indenting the body of the message and making it
1295 **************************************************************************/
1297 static void format_debug_text( const char *msg )
1300 bool timestamp = (state.logtype == DEBUG_FILE && (state.settings.timestamp_logs));
1304 for( i = 0; msg[i]; i++ ) {
1305 /* Indent two spaces at each new line. */
1306 if(timestamp && 0 == format_pos) {
1307 format_bufr[0] = format_bufr[1] = ' ';
1311 /* If there's room, copy the character to the format buffer. */
1312 if (format_pos < FORMAT_BUFR_SIZE - 1)
1313 format_bufr[format_pos++] = msg[i];
1315 /* If a newline is encountered, print & restart. */
1316 if( '\n' == msg[i] )
1319 /* If the buffer is full dump it out, reset it, and put out a line
1320 * continuation indicator.
1322 if (format_pos >= FORMAT_BUFR_SIZE - 1) {
1324 (void)Debug1( " +>\n" );
1328 /* Just to be safe... */
1329 format_bufr[format_pos] = '\0';
1332 /***************************************************************************
1333 Flush debug output, including the format buffer content.
1337 ***************************************************************************/
1339 void dbgflush( void )
1344 /***************************************************************************
1345 Print a Debug Header.
1347 Input: level - Debug level of the message (not the system-wide debug
1349 cls - Debuglevel class of the calling module.
1350 location - Pointer to a string containing the name of the file
1351 from which this function was called, or an empty string
1352 if the __FILE__ macro is not implemented.
1353 func - Pointer to a string containing the name of the function
1354 from which this function was called, or an empty string
1355 if the __FUNCTION__ macro is not implemented.
1357 Output: Always true. This makes it easy to fudge a call to dbghdr()
1358 in a macro, since the function can be called as part of a test.
1359 Eg: ( (level <= DEBUGLEVEL) && (dbghdr(level,"",line)) )
1361 Notes: This function takes care of setting current_msg_level.
1363 ****************************************************************************/
1365 bool dbghdrclass(int level, int cls, const char *location, const char *func)
1367 /* Ensure we don't lose any real errno value. */
1368 int old_errno = errno;
1369 bool verbose = false;
1370 char header_str[300];
1373 struct timeval_buf tvbuf;
1376 /* This is a fudge. If there is stuff sitting in the format_bufr, then
1377 * the *right* thing to do is to call
1378 * format_debug_text( "\n" );
1379 * to write the remainder, and then proceed with the new header.
1380 * Unfortunately, there are several places in the code at which
1381 * the DEBUG() macro is used to build partial lines. That in mind,
1382 * we'll work under the assumption that an incomplete line indicates
1383 * that a new header is *not* desired.
1388 /* Set current_msg_level. */
1389 current_msg_level = level;
1391 /* Don't print a header if we're logging to stdout. */
1392 if ( state.logtype != DEBUG_FILE ) {
1396 /* Print the header if timestamps are turned on. If parameters are
1397 * not yet loaded, then default to timestamps on.
1399 if (!(state.settings.timestamp_logs ||
1400 state.settings.debug_prefix_timestamp)) {
1405 timeval_str_buf(&tv, false, state.settings.debug_hires_timestamp,
1408 hs_len = snprintf(header_str, sizeof(header_str), "[%s, %2d",
1410 if (hs_len >= sizeof(header_str)) {
1414 if (unlikely(dbgc_config[cls] >= 10)) {
1418 if (verbose || state.settings.debug_pid) {
1420 header_str + hs_len, sizeof(header_str) - hs_len,
1421 ", pid=%u", (unsigned int)getpid());
1422 if (hs_len >= sizeof(header_str)) {
1427 if (verbose || state.settings.debug_uid) {
1429 header_str + hs_len, sizeof(header_str) - hs_len,
1430 ", effective(%u, %u), real(%u, %u)",
1431 (unsigned int)geteuid(), (unsigned int)getegid(),
1432 (unsigned int)getuid(), (unsigned int)getgid());
1433 if (hs_len >= sizeof(header_str)) {
1438 if ((verbose || state.settings.debug_class)
1439 && (cls != DBGC_ALL)) {
1441 header_str + hs_len, sizeof(header_str) - hs_len,
1442 ", class=%s", classname_table[cls]);
1443 if (hs_len >= sizeof(header_str)) {
1449 * No +=, see man man strlcat
1451 hs_len = strlcat(header_str, "] ", sizeof(header_str));
1452 if (hs_len >= sizeof(header_str)) {
1456 if (!state.settings.debug_prefix_timestamp) {
1458 header_str + hs_len, sizeof(header_str) - hs_len,
1459 "%s(%s)\n", location, func);
1460 if (hs_len >= sizeof(header_str)) {
1466 (void)Debug1(header_str);
1472 /***************************************************************************
1473 Add text to the body of the "current" debug message via the format buffer.
1475 Input: format_str - Format string, as used in printf(), et. al.
1476 ... - Variable argument list.
1478 ..or.. va_alist - Old style variable parameter list starting point.
1480 Output: Always true. See dbghdr() for more info, though this is not
1481 likely to be used in the same way.
1483 ***************************************************************************/
1485 static inline bool __dbgtext_va(const char *format_str, va_list ap) PRINTF_ATTRIBUTE(1,0);
1486 static inline bool __dbgtext_va(const char *format_str, va_list ap)
1488 char *msgbuf = NULL;
1492 res = vasprintf(&msgbuf, format_str, ap);
1494 format_debug_text(msgbuf);
1502 bool dbgtext_va(const char *format_str, va_list ap)
1504 return __dbgtext_va(format_str, ap);
1507 bool dbgtext(const char *format_str, ... )
1512 va_start(ap, format_str);
1513 ret = __dbgtext_va(format_str, ap);