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 ((len > 0) && (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",
542 [DBGC_KERBEROS] = "kerberos",
543 [DBGC_DRS_REPL] = "drs_repl",
544 [DBGC_SMB2] = "smb2",
545 [DBGC_SMB2_CREDITS] = "smb2_credits",
546 [DBGC_DSDB_AUDIT] = "dsdb_audit",
547 [DBGC_DSDB_AUDIT_JSON] = "dsdb_json_audit",
548 [DBGC_DSDB_PWD_AUDIT] = "dsdb_password_audit",
549 [DBGC_DSDB_PWD_AUDIT_JSON] = "dsdb_password_json_audit",
550 [DBGC_DSDB_TXN_AUDIT] = "dsdb_transaction_audit",
551 [DBGC_DSDB_TXN_AUDIT_JSON] = "dsdb_transaction_json_audit",
555 * This is to allow reading of DEBUGLEVEL_CLASS before the debug
556 * system has been initialized.
558 static const int debug_class_list_initial[ARRAY_SIZE(default_classname_table)];
560 static int debug_num_classes = 0;
561 int *DEBUGLEVEL_CLASS = discard_const_p(int, debug_class_list_initial);
564 /* -------------------------------------------------------------------------- **
565 * Internal variables.
567 * debug_count - Number of debug messages that have been output.
568 * Used to check log size.
570 * current_msg_level - Internal copy of the message debug level. Written by
571 * dbghdr() and read by Debug1().
573 * format_bufr - Used to format debug messages. The dbgtext() function
574 * prints debug messages to a string, and then passes the
575 * string to format_debug_text(), which uses format_bufr
576 * to build the formatted output.
578 * format_pos - Marks the first free byte of the format_bufr.
581 * log_overflow - When this variable is true, never attempt to check the
582 * size of the log. This is a hack, so that we can write
583 * a message using DEBUG, from open_logs() when we
584 * are unable to open a new log file for some reason.
587 static int debug_count = 0;
588 static int current_msg_level = 0;
589 static char format_bufr[FORMAT_BUFR_SIZE];
590 static size_t format_pos = 0;
591 static bool log_overflow = false;
594 * Define all the debug class selection names here. Names *MUST NOT* contain
595 * white space. There must be one name for each DBGC_<class name>, and they
596 * must be in the table in the order of DBGC_<class name>..
599 static char **classname_table = NULL;
602 /* -------------------------------------------------------------------------- **
606 static void debug_init(void);
608 /***************************************************************************
609 Free memory pointed to by global pointers.
610 ****************************************************************************/
612 void gfree_debugsyms(void)
616 TALLOC_FREE(classname_table);
618 if ( DEBUGLEVEL_CLASS != debug_class_list_initial ) {
619 TALLOC_FREE( DEBUGLEVEL_CLASS );
620 DEBUGLEVEL_CLASS = discard_const_p(int, debug_class_list_initial);
623 debug_num_classes = 0;
625 state.initialized = false;
627 for (i = 0; i < ARRAY_SIZE(debug_backends); i++) {
628 SAFE_FREE(debug_backends[i].option);
632 /****************************************************************************
633 utility lists registered debug class names's
634 ****************************************************************************/
636 char *debug_list_class_names_and_levels(void)
640 /* prepare strings */
641 for (i = 0; i < debug_num_classes; i++) {
642 buf = talloc_asprintf_append(buf,
646 i == (debug_num_classes - 1) ? "\n" : " ");
654 /****************************************************************************
655 Utility to translate names to debug class index's (internal version).
656 ****************************************************************************/
658 static int debug_lookup_classname_int(const char* classname)
662 if (!classname) return -1;
664 for (i=0; i < debug_num_classes; i++) {
665 if (strcmp(classname, classname_table[i])==0)
671 /****************************************************************************
672 Add a new debug class to the system.
673 ****************************************************************************/
675 int debug_add_class(const char *classname)
679 char **new_name_list;
685 /* check the init has yet been called */
688 ndx = debug_lookup_classname_int(classname);
691 ndx = debug_num_classes;
693 if (DEBUGLEVEL_CLASS == debug_class_list_initial) {
694 /* Initial loading... */
695 new_class_list = NULL;
697 new_class_list = DEBUGLEVEL_CLASS;
700 default_level = DEBUGLEVEL_CLASS[DBGC_ALL];
702 new_class_list = talloc_realloc(NULL, new_class_list, int, ndx + 1);
705 DEBUGLEVEL_CLASS = new_class_list;
707 DEBUGLEVEL_CLASS[ndx] = default_level;
709 new_name_list = talloc_realloc(NULL, classname_table, char *, ndx + 1);
712 classname_table = new_name_list;
714 classname_table[ndx] = talloc_strdup(classname_table, classname);
715 if (! classname_table[ndx])
718 debug_num_classes = ndx + 1;
723 /****************************************************************************
724 Utility to translate names to debug class index's (public version).
725 ****************************************************************************/
727 static int debug_lookup_classname(const char *classname)
731 if (!classname || !*classname)
734 ndx = debug_lookup_classname_int(classname);
739 DEBUG(0, ("debug_lookup_classname(%s): Unknown class\n",
741 return debug_add_class(classname);
744 /****************************************************************************
745 Dump the current registered debug levels.
746 ****************************************************************************/
748 static void debug_dump_status(int level)
752 DEBUG(level, ("INFO: Current debug levels:\n"));
753 for (q = 0; q < debug_num_classes; q++) {
754 const char *classname = classname_table[q];
755 DEBUGADD(level, (" %s: %d\n",
757 DEBUGLEVEL_CLASS[q]));
761 static bool debug_parse_param(char *param)
765 char *saveptr = NULL;
768 class_name = strtok_r(param, ":", &saveptr);
769 if (class_name == NULL) {
773 class_level = strtok_r(NULL, "\0", &saveptr);
774 if (class_level == NULL) {
778 ndx = debug_lookup_classname(class_name);
783 DEBUGLEVEL_CLASS[ndx] = atoi(class_level);
788 /****************************************************************************
789 Parse the debug levels from smb.conf. Example debug level string:
790 3 tdb:5 printdrivers:7
791 Note: the 1st param has no "name:" preceeding it.
792 ****************************************************************************/
794 bool debug_parse_levels(const char *params_str)
796 size_t str_len = strlen(params_str);
804 memcpy(str, params_str, str_len+1);
806 tok = strtok_r(str, LIST_SEP, &saveptr);
811 /* Allow DBGC_ALL to be specified w/o requiring its class name e.g."10"
812 * v.s. "all:10", this is the traditional way to set DEBUGLEVEL
814 if (isdigit(tok[0])) {
815 DEBUGLEVEL_CLASS[DBGC_ALL] = atoi(tok);
816 tok = strtok_r(NULL, LIST_SEP, &saveptr);
818 DEBUGLEVEL_CLASS[DBGC_ALL] = 0;
821 /* Array is debug_num_classes long */
822 for (i = DBGC_ALL+1; i < debug_num_classes; i++) {
823 DEBUGLEVEL_CLASS[i] = DEBUGLEVEL_CLASS[DBGC_ALL];
826 while (tok != NULL) {
829 ok = debug_parse_param(tok);
831 DEBUG(0,("debug_parse_params: unrecognized debug "
832 "class name or format [%s]\n", tok));
836 tok = strtok_r(NULL, LIST_SEP, &saveptr);
839 debug_dump_status(5);
844 /* setup for logging of talloc warnings */
845 static void talloc_log_fn(const char *msg)
847 DEBUG(0,("%s", msg));
850 void debug_setup_talloc_log(void)
852 talloc_set_log_fn(talloc_log_fn);
856 /****************************************************************************
857 Init debugging (one time stuff)
858 ****************************************************************************/
860 static void debug_init(void)
864 if (state.initialized)
867 state.initialized = true;
869 debug_setup_talloc_log();
871 for (i = 0; i < ARRAY_SIZE(default_classname_table); i++) {
872 debug_add_class(default_classname_table[i]);
875 for (i = 0; i < ARRAY_SIZE(debug_backends); i++) {
876 debug_backends[i].log_level = -1;
877 debug_backends[i].new_log_level = -1;
881 void debug_set_settings(struct debug_settings *settings,
882 const char *logging_param,
883 int syslog_level, bool syslog_only)
885 char fake_param[256];
889 * This forces in some smb.conf derived values into the debug
890 * system. There are no pointers in this structure, so we can
891 * just structure-assign it in
893 state.settings = *settings;
896 * If 'logging' is not set, create backend settings from
897 * deprecated 'syslog' and 'syslog only' parameters
899 if (logging_param != NULL) {
900 len = strlen(logging_param);
904 snprintf(fake_param, sizeof(fake_param),
905 "syslog@%d", syslog_level - 1);
907 snprintf(fake_param, sizeof(fake_param),
908 "syslog@%d file@%d", syslog_level -1,
912 logging_param = fake_param;
915 debug_set_backends(logging_param);
919 control the name of the logfile and whether logging will be to stdout, stderr
920 or a file, and set up syslog
922 new_log indicates the destination for the debug log (an enum in
923 order of precedence - once set to DEBUG_FILE, it is not possible to
924 reset to DEBUG_STDOUT for example. This makes it easy to override
925 for debug to stderr on the command line, as the smb.conf cannot
926 reset it back to file-based logging
928 void setup_logging(const char *prog_name, enum debug_logtype new_logtype)
931 if (state.logtype < new_logtype) {
932 state.logtype = new_logtype;
935 const char *p = strrchr(prog_name, '/');
941 state.prog_name = prog_name;
943 reopen_logs_internal();
946 /***************************************************************************
947 Set the logfile name.
948 **************************************************************************/
950 void debug_set_logfile(const char *name)
952 if (name == NULL || *name == 0) {
953 /* this copes with calls when smb.conf is not loaded yet */
956 TALLOC_FREE(state.debugf);
957 state.debugf = talloc_strdup(NULL, name);
960 static void debug_close_fd(int fd)
967 bool debug_get_output_is_stderr(void)
969 return (state.logtype == DEBUG_DEFAULT_STDERR) || (state.logtype == DEBUG_STDERR);
972 bool debug_get_output_is_stdout(void)
974 return (state.logtype == DEBUG_DEFAULT_STDOUT) || (state.logtype == DEBUG_STDOUT);
977 void debug_set_callback(void *private_ptr, debug_callback_fn fn)
981 state.logtype = DEBUG_CALLBACK;
982 state.callback_private = private_ptr;
985 state.logtype = DEBUG_DEFAULT_STDERR;
986 state.callback_private = NULL;
987 state.callback = NULL;
991 static void debug_callback_log(const char *msg, int msg_level)
993 size_t msg_len = strlen(msg);
994 char msg_copy[msg_len];
996 if ((msg_len > 0) && (msg[msg_len-1] == '\n')) {
997 memcpy(msg_copy, msg, msg_len-1);
998 msg_copy[msg_len-1] = '\0';
1002 state.callback(state.callback_private, msg_level, msg);
1005 /**************************************************************************
1006 reopen the log files
1007 note that we now do this unconditionally
1008 We attempt to open the new debug fp before closing the old. This means
1009 if we run out of fd's we just keep using the old fd rather than aborting.
1010 Fix from dgibson@linuxcare.com.
1011 **************************************************************************/
1014 reopen the log file (usually called because the log file name might have changed)
1016 bool reopen_logs_internal(void)
1023 if (state.reopening_logs) {
1027 /* Now clear the SIGHUP induced flag */
1028 state.schedule_reopen_logs = false;
1030 switch (state.logtype) {
1031 case DEBUG_CALLBACK:
1034 case DEBUG_DEFAULT_STDOUT:
1035 debug_close_fd(state.fd);
1039 case DEBUG_DEFAULT_STDERR:
1041 debug_close_fd(state.fd);
1049 oldumask = umask( 022 );
1051 if (!state.debugf) {
1055 state.reopening_logs = true;
1057 new_fd = open( state.debugf, O_WRONLY|O_APPEND|O_CREAT, 0644);
1060 log_overflow = true;
1061 DEBUG(0, ("Unable to open new log file '%s': %s\n", state.debugf, strerror(errno)));
1062 log_overflow = false;
1065 smb_set_close_on_exec(new_fd);
1068 debug_close_fd(old_fd);
1071 /* Fix from klausr@ITAP.Physik.Uni-Stuttgart.De
1072 * to fix problem where smbd's that generate less
1073 * than 100 messages keep growing the log.
1075 force_check_log_size();
1076 (void)umask(oldumask);
1078 /* Take over stderr to catch output into logs */
1080 if (dup2(state.fd, 2) == -1) {
1081 /* Close stderr too, if dup2 can't point it -
1082 at the logfile. There really isn't much
1083 that can be done on such a fundamental
1089 state.reopening_logs = false;
1094 /**************************************************************************
1095 Force a check of the log size.
1096 ***************************************************************************/
1098 void force_check_log_size( void )
1103 _PUBLIC_ void debug_schedule_reopen_logs(void)
1105 state.schedule_reopen_logs = true;
1109 /***************************************************************************
1110 Check to see if there is any need to check if the logfile has grown too big.
1111 **************************************************************************/
1113 bool need_to_check_log_size( void )
1117 if( debug_count < 100)
1120 maxlog = state.settings.max_log_size * 1024;
1121 if ( state.fd <=2 || maxlog <= 0 ) {
1128 /**************************************************************************
1129 Check to see if the log has grown to be too big.
1130 **************************************************************************/
1132 void check_log_size( void )
1138 * We need to be root to check/change log-file, skip this and let the main
1139 * loop check do a new check as root.
1142 #if _SAMBA_BUILD_ == 3
1143 if (geteuid() != sec_initial_uid())
1148 /* We don't check sec_initial_uid() here as it isn't
1149 * available in common code and we don't generally
1150 * want to rotate and the possibly lose logs in
1151 * make test or the build farm */
1155 if(log_overflow || (!state.schedule_reopen_logs && !need_to_check_log_size())) {
1159 maxlog = state.settings.max_log_size * 1024;
1161 if (state.schedule_reopen_logs) {
1162 (void)reopen_logs_internal();
1165 if (maxlog && (fstat(state.fd, &st) == 0
1166 && st.st_size > maxlog )) {
1167 (void)reopen_logs_internal();
1168 if (state.fd > 2 && (fstat(state.fd, &st) == 0
1169 && st.st_size > maxlog)) {
1170 char name[strlen(state.debugf) + 5];
1172 snprintf(name, sizeof(name), "%s.old", state.debugf);
1174 (void)rename(state.debugf, name);
1176 if (!reopen_logs_internal()) {
1177 /* We failed to reopen a log - continue using the old name. */
1178 (void)rename(name, state.debugf);
1184 * Here's where we need to panic if state.fd == 0 or -1 (invalid values)
1187 if (state.fd <= 0) {
1188 /* This code should only be reached in very strange
1189 * circumstances. If we merely fail to open the new log we
1190 * should stick with the old one. ergo this should only be
1191 * reached when opening the logs for the first time: at
1192 * startup or when the log level is increased from zero.
1195 int fd = open( "/dev/console", O_WRONLY, 0);
1197 smb_set_close_on_exec(fd);
1199 DEBUG(0,("check_log_size: open of debug file %s failed - using console.\n",
1203 * We cannot continue without a debug file handle.
1211 /*************************************************************************
1212 Write an debug message on the debugfile.
1213 This is called by dbghdr() and format_debug_text().
1214 ************************************************************************/
1216 static void Debug1(const char *msg)
1218 int old_errno = errno;
1222 switch(state.logtype) {
1223 case DEBUG_CALLBACK:
1224 debug_callback_log(msg, current_msg_level);
1228 case DEBUG_DEFAULT_STDOUT:
1229 case DEBUG_DEFAULT_STDERR:
1233 ret = write(state.fd, msg, strlen(msg));
1234 } while (ret == -1 && errno == EINTR);
1238 debug_backends_log(msg, current_msg_level);
1245 /**************************************************************************
1246 Print the buffer content via Debug1(), then reset the buffer.
1249 ****************************************************************************/
1251 static void bufr_print( void )
1253 format_bufr[format_pos] = '\0';
1254 (void)Debug1(format_bufr);
1258 /***************************************************************************
1259 Format the debug message text.
1261 Input: msg - Text to be added to the "current" debug message text.
1265 Notes: The purpose of this is two-fold. First, each call to syslog()
1266 (used by Debug1(), see above) generates a new line of syslog
1267 output. This is fixed by storing the partial lines until the
1268 newline character is encountered. Second, printing the debug
1269 message lines when a newline is encountered allows us to add
1270 spaces, thus indenting the body of the message and making it
1272 **************************************************************************/
1274 static void format_debug_text( const char *msg )
1277 bool timestamp = (state.logtype == DEBUG_FILE && (state.settings.timestamp_logs));
1281 for( i = 0; msg[i]; i++ ) {
1282 /* Indent two spaces at each new line. */
1283 if(timestamp && 0 == format_pos) {
1284 format_bufr[0] = format_bufr[1] = ' ';
1288 /* If there's room, copy the character to the format buffer. */
1289 if (format_pos < FORMAT_BUFR_SIZE - 1)
1290 format_bufr[format_pos++] = msg[i];
1292 /* If a newline is encountered, print & restart. */
1293 if( '\n' == msg[i] )
1296 /* If the buffer is full dump it out, reset it, and put out a line
1297 * continuation indicator.
1299 if (format_pos >= FORMAT_BUFR_SIZE - 1) {
1301 (void)Debug1( " +>\n" );
1305 /* Just to be safe... */
1306 format_bufr[format_pos] = '\0';
1309 /***************************************************************************
1310 Flush debug output, including the format buffer content.
1314 ***************************************************************************/
1316 void dbgflush( void )
1321 /***************************************************************************
1322 Print a Debug Header.
1324 Input: level - Debug level of the message (not the system-wide debug
1326 cls - Debuglevel class of the calling module.
1327 location - Pointer to a string containing the name of the file
1328 from which this function was called, or an empty string
1329 if the __FILE__ macro is not implemented.
1330 func - Pointer to a string containing the name of the function
1331 from which this function was called, or an empty string
1332 if the __FUNCTION__ macro is not implemented.
1334 Output: Always true. This makes it easy to fudge a call to dbghdr()
1335 in a macro, since the function can be called as part of a test.
1336 Eg: ( (level <= DEBUGLEVEL) && (dbghdr(level,"",line)) )
1338 Notes: This function takes care of setting current_msg_level.
1340 ****************************************************************************/
1342 bool dbghdrclass(int level, int cls, const char *location, const char *func)
1344 /* Ensure we don't lose any real errno value. */
1345 int old_errno = errno;
1346 bool verbose = false;
1347 char header_str[300];
1350 struct timeval_buf tvbuf;
1353 /* This is a fudge. If there is stuff sitting in the format_bufr, then
1354 * the *right* thing to do is to call
1355 * format_debug_text( "\n" );
1356 * to write the remainder, and then proceed with the new header.
1357 * Unfortunately, there are several places in the code at which
1358 * the DEBUG() macro is used to build partial lines. That in mind,
1359 * we'll work under the assumption that an incomplete line indicates
1360 * that a new header is *not* desired.
1365 /* Set current_msg_level. */
1366 current_msg_level = level;
1368 /* Don't print a header if we're logging to stdout. */
1369 if ( state.logtype != DEBUG_FILE ) {
1373 /* Print the header if timestamps are turned on. If parameters are
1374 * not yet loaded, then default to timestamps on.
1376 if (!(state.settings.timestamp_logs ||
1377 state.settings.debug_prefix_timestamp)) {
1382 timeval_str_buf(&tv, false, state.settings.debug_hires_timestamp,
1385 hs_len = snprintf(header_str, sizeof(header_str), "[%s, %2d",
1387 if (hs_len >= sizeof(header_str)) {
1391 if (unlikely(DEBUGLEVEL_CLASS[ cls ] >= 10)) {
1395 if (verbose || state.settings.debug_pid) {
1397 header_str + hs_len, sizeof(header_str) - hs_len,
1398 ", pid=%u", (unsigned int)getpid());
1399 if (hs_len >= sizeof(header_str)) {
1404 if (verbose || state.settings.debug_uid) {
1406 header_str + hs_len, sizeof(header_str) - hs_len,
1407 ", effective(%u, %u), real(%u, %u)",
1408 (unsigned int)geteuid(), (unsigned int)getegid(),
1409 (unsigned int)getuid(), (unsigned int)getgid());
1410 if (hs_len >= sizeof(header_str)) {
1415 if ((verbose || state.settings.debug_class)
1416 && (cls != DBGC_ALL)) {
1418 header_str + hs_len, sizeof(header_str) - hs_len,
1419 ", class=%s", classname_table[cls]);
1420 if (hs_len >= sizeof(header_str)) {
1426 * No +=, see man man strlcat
1428 hs_len = strlcat(header_str, "] ", sizeof(header_str));
1429 if (hs_len >= sizeof(header_str)) {
1433 if (!state.settings.debug_prefix_timestamp) {
1435 header_str + hs_len, sizeof(header_str) - hs_len,
1436 "%s(%s)\n", location, func);
1437 if (hs_len >= sizeof(header_str)) {
1443 (void)Debug1(header_str);
1449 /***************************************************************************
1450 Add text to the body of the "current" debug message via the format buffer.
1452 Input: format_str - Format string, as used in printf(), et. al.
1453 ... - Variable argument list.
1455 ..or.. va_alist - Old style variable parameter list starting point.
1457 Output: Always true. See dbghdr() for more info, though this is not
1458 likely to be used in the same way.
1460 ***************************************************************************/
1462 static inline bool __dbgtext_va(const char *format_str, va_list ap) PRINTF_ATTRIBUTE(1,0);
1463 static inline bool __dbgtext_va(const char *format_str, va_list ap)
1465 char *msgbuf = NULL;
1469 res = vasprintf(&msgbuf, format_str, ap);
1471 format_debug_text(msgbuf);
1479 bool dbgtext_va(const char *format_str, va_list ap)
1481 return __dbgtext_va(format_str, ap);
1484 bool dbgtext(const char *format_str, ... )
1489 va_start(ap, format_str);
1490 ret = __dbgtext_va(format_str, ap);