lib/util/debug_s3.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba utility functions
   4    Copyright (C) Andrew Bartlett 2011
   5    Copyright (C) Andrew Tridgell 1992-2002
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "lib/util/server_id.h"
  23 #include "librpc/gen_ndr/messaging.h"
  24 #include "messages.h"
  25 #include "lib/util/memory.h"
  26
  27 /* This is the Samba3-specific implementation of reopen_logs(), which
  28  * calls out to the s3 loadparm code, and means that we don't depend
  29  * on loadparm directly. */
  30
  31 bool reopen_logs(void)
  32 {
  33         if (lp_loaded()) {
  34                 struct debug_settings settings = {
  35                         .max_log_size = lp_max_log_size(),
  36                         .timestamp_logs = lp_timestamp_logs(),
  37                         .debug_prefix_timestamp = lp_debug_prefix_timestamp(),
  38                         .debug_hires_timestamp = lp_debug_hires_timestamp(),
  39                         .debug_pid = lp_debug_pid(),
  40                         .debug_uid = lp_debug_uid(),
  41                         .debug_class = lp_debug_class(),
  42                 };
  43                 const struct loadparm_substitution *lp_sub =
  44                         loadparm_s3_global_substitution();
  45
  46                 debug_set_logfile(lp_logfile(talloc_tos(), lp_sub));
  47                 debug_parse_levels(lp_log_level(talloc_tos(), lp_sub));
  48                 debug_set_settings(&settings,
  49                                    lp_logging(talloc_tos(), lp_sub),
  50                                    lp_syslog(),
  51                                    lp_syslog_only());
  52         } else {
  53                 /*
  54                  * Parameters are not yet loaded - configure debugging with
  55                  * reasonable defaults to enable logging for early
  56                  * startup failures.
  57                  */
  58                 struct debug_settings settings = {
  59                         .max_log_size = 5000,
  60                         .timestamp_logs = true,
  61                         .debug_prefix_timestamp = false,
  62                         .debug_hires_timestamp = true,
  63                         .debug_pid = false,
  64                         .debug_uid = false,
  65                         .debug_class = false,
  66                 };
  67                 debug_set_settings(&settings,
  68                                    "file",
  69                                    1,
  70                                    false);
  71         }
  72         return reopen_logs_internal();
  73 }
  74
  75 /****************************************************************************
  76  Receive a "set debug level" message.
  77 ****************************************************************************/
  78
  79 void debug_message(struct messaging_context *msg_ctx,
  80                           void *private_data,
  81                           uint32_t msg_type,
  82                           struct server_id src,
  83                           DATA_BLOB *data)
  84 {
  85         const char *params_str = (const char *)data->data;
  86
  87         /* Check, it's a proper string! */
  88         if (params_str[(data->length)-1] != '\0') {
  89                 DEBUG(1, ("Invalid debug message from pid %u to pid %u\n",
  90                           (unsigned int)procid_to_pid(&src),
  91                           (unsigned int)getpid()));
  92                 return;
  93         }
  94
  95         DEBUG(3, ("INFO: Remote set of debug to `%s'  (pid %u from pid %u)\n",
  96                   params_str, (unsigned int)getpid(),
  97                   (unsigned int)procid_to_pid(&src)));
  98
  99         debug_parse_levels(params_str);
 100 }
 101
 102 /****************************************************************************
 103  Return current debug level.
 104 ****************************************************************************/
 105
 106 static void debuglevel_message(struct messaging_context *msg_ctx,
 107                                void *private_data,
 108                                uint32_t msg_type,
 109                                struct server_id src,
 110                                DATA_BLOB *data)
 111 {
 112         char *message = debug_list_class_names_and_levels();
 113         struct server_id_buf tmp;
 114
 115         if (!message) {
 116                 DEBUG(0,("debuglevel_message - debug_list_class_names_and_levels returned NULL\n"));
 117                 return;
 118         }
 119
 120         DEBUG(1, ("INFO: Received REQ_DEBUGLEVEL message from PID %s\n",
 121                   server_id_str_buf(src, &tmp)));
 122         messaging_send_buf(msg_ctx, src, MSG_DEBUGLEVEL,
 123                            (uint8_t *)message, strlen(message) + 1);
 124
 125         TALLOC_FREE(message);
 126 }
 127
 128 static void debug_ringbuf_log(struct messaging_context *msg_ctx,
 129                               void *private_data,
 130                               uint32_t msg_type,
 131                               struct server_id src,
 132                               DATA_BLOB *data)
 133 {
 134         char *log = debug_get_ringbuf();
 135         size_t logsize = debug_get_ringbuf_size();
 136
 137         if (log == NULL) {
 138                 log = discard_const_p(char, "*disabled*\n");
 139                 logsize = strlen(log) + 1;
 140         }
 141
 142         messaging_send_buf(msg_ctx, src, MSG_RINGBUF_LOG, (uint8_t *)log,
 143                            logsize);
 144 }
 145
 146 void debug_register_msgs(struct messaging_context *msg_ctx)
 147 {
 148         messaging_register(msg_ctx, NULL, MSG_DEBUG, debug_message);
 149         messaging_register(msg_ctx, NULL, MSG_REQ_DEBUGLEVEL,
 150                            debuglevel_message);
 151         messaging_register(msg_ctx, NULL, MSG_REQ_RINGBUF_LOG,
 152                            debug_ringbuf_log);
 153 }