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
  44                 debug_set_logfile(lp_logfile(talloc_tos()));
  45                 debug_parse_levels(lp_log_level(talloc_tos()));
  46                 debug_set_settings(&settings,
  47                                    lp_logging(talloc_tos()),
  48                                    lp_syslog(),
  49                                    lp_syslog_only());
  50         } else {
  51                 /*
  52                  * Parameters are not yet loaded - configure debugging with
  53                  * reasonable defaults to enable logging for early
  54                  * startup failures.
  55                  */
  56                 struct debug_settings settings = {
  57                         .max_log_size = 5000,
  58                         .timestamp_logs = true,
  59                         .debug_prefix_timestamp = false,
  60                         .debug_hires_timestamp = true,
  61                         .debug_pid = false,
  62                         .debug_uid = false,
  63                         .debug_class = false,
  64                 };
  65                 debug_set_settings(&settings,
  66                                    "file",
  67                                    1,
  68                                    false);
  69         }
  70         return reopen_logs_internal();
  71 }
  72
  73 /****************************************************************************
  74  Receive a "set debug level" message.
  75 ****************************************************************************/
  76
  77 void debug_message(struct messaging_context *msg_ctx,
  78                           void *private_data,
  79                           uint32_t msg_type,
  80                           struct server_id src,
  81                           DATA_BLOB *data)
  82 {
  83         const char *params_str = (const char *)data->data;
  84
  85         /* Check, it's a proper string! */
  86         if (params_str[(data->length)-1] != '\0') {
  87                 DEBUG(1, ("Invalid debug message from pid %u to pid %u\n",
  88                           (unsigned int)procid_to_pid(&src),
  89                           (unsigned int)getpid()));
  90                 return;
  91         }
  92
  93         DEBUG(3, ("INFO: Remote set of debug to `%s'  (pid %u from pid %u)\n",
  94                   params_str, (unsigned int)getpid(),
  95                   (unsigned int)procid_to_pid(&src)));
  96
  97         debug_parse_levels(params_str);
  98 }
  99
 100 /****************************************************************************
 101  Return current debug level.
 102 ****************************************************************************/
 103
 104 static void debuglevel_message(struct messaging_context *msg_ctx,
 105                                void *private_data,
 106                                uint32_t msg_type,
 107                                struct server_id src,
 108                                DATA_BLOB *data)
 109 {
 110         char *message = debug_list_class_names_and_levels();
 111         struct server_id_buf tmp;
 112
 113         if (!message) {
 114                 DEBUG(0,("debuglevel_message - debug_list_class_names_and_levels returned NULL\n"));
 115                 return;
 116         }
 117
 118         DEBUG(1, ("INFO: Received REQ_DEBUGLEVEL message from PID %s\n",
 119                   server_id_str_buf(src, &tmp)));
 120         messaging_send_buf(msg_ctx, src, MSG_DEBUGLEVEL,
 121                            (uint8_t *)message, strlen(message) + 1);
 122
 123         TALLOC_FREE(message);
 124 }
 125
 126 static void debug_ringbuf_log(struct messaging_context *msg_ctx,
 127                               void *private_data,
 128                               uint32_t msg_type,
 129                               struct server_id src,
 130                               DATA_BLOB *data)
 131 {
 132         char *log = debug_get_ringbuf();
 133         size_t logsize = debug_get_ringbuf_size();
 134
 135         if (log == NULL) {
 136                 log = discard_const_p(char, "*disabled*\n");
 137                 logsize = strlen(log) + 1;
 138         }
 139
 140         messaging_send_buf(msg_ctx, src, MSG_RINGBUF_LOG, (uint8_t *)log,
 141                            logsize);
 142 }
 143
 144 void debug_register_msgs(struct messaging_context *msg_ctx)
 145 {
 146         messaging_register(msg_ctx, NULL, MSG_DEBUG, debug_message);
 147         messaging_register(msg_ctx, NULL, MSG_REQ_DEBUGLEVEL,
 148                            debuglevel_message);
 149         messaging_register(msg_ctx, NULL, MSG_REQ_RINGBUF_LOG,
 150                            debug_ringbuf_log);
 151 }