source3/lib/tallocmsg.c

   1 /*
   2    samba -- Unix SMB/CIFS implementation.
   3    Copyright (C) 2001, 2002 by Martin Pool
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #include "includes.h"
  20 #include "messages.h"
  21 #include "lib/util/talloc_report_printf.h"
  22
  23 static bool pool_usage_filter(struct messaging_rec *rec, void *private_data)
  24 {
  25         FILE *f = NULL;
  26         int fd;
  27
  28         if (rec->msg_type != MSG_REQ_POOL_USAGE) {
  29                 return false;
  30         }
  31
  32         DBG_DEBUG("Got MSG_REQ_POOL_USAGE\n");
  33
  34         if (rec->num_fds != 1) {
  35                 DBG_DEBUG("Got %"PRIu8" fds, expected one\n", rec->num_fds);
  36                 return false;
  37         }
  38
  39         fd = dup(rec->fds[0]);
  40         if (fd == -1) {
  41                 DBG_DEBUG("dup(%"PRIi64") failed: %s\n",
  42                           rec->fds[0],
  43                           strerror(errno));
  44                 return false;
  45         }
  46
  47         f = fdopen(fd, "w");
  48         if (f == NULL) {
  49                 DBG_DEBUG("fdopen failed: %s\n", strerror(errno));
  50                 close(fd);
  51                 return false;
  52         }
  53
  54         talloc_full_report_printf(NULL, f);
  55
  56         fclose(f);
  57         /*
  58          * Returning false, means messaging_dispatch_waiters()
  59          * won't call messaging_filtered_read_done() and
  60          * our messaging_filtered_read_send() stays alive
  61          * and will get messages.
  62          */
  63         return false;
  64 }
  65
  66 /**
  67  * Register handler for MSG_REQ_POOL_USAGE
  68  **/
  69 void register_msg_pool_usage(
  70         TALLOC_CTX *mem_ctx, struct messaging_context *msg_ctx)
  71 {
  72         struct tevent_req *req = NULL;
  73
  74         req = messaging_filtered_read_send(
  75                 mem_ctx,
  76                 messaging_tevent_context(msg_ctx),
  77                 msg_ctx,
  78                 pool_usage_filter,
  79                 NULL);
  80         if (req == NULL) {
  81                 DBG_WARNING("messaging_filtered_read_send failed\n");
  82                 return;
  83         }
  84         DEBUG(2, ("Registered MSG_REQ_POOL_USAGE\n"));
  85 }