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 #ifdef HAVE_MALLINFO
  23 #include <malloc.h>
  24 #endif /* HAVE_MALLINFO */
  25
  26 static bool pool_usage_filter(struct messaging_rec *rec, void *private_data)
  27 {
  28         FILE *f = NULL;
  29         int fd;
  30
  31         if (rec->msg_type != MSG_REQ_POOL_USAGE) {
  32                 return false;
  33         }
  34
  35         DBG_DEBUG("Got MSG_REQ_POOL_USAGE\n");
  36
  37         if (rec->num_fds != 1) {
  38                 DBG_DEBUG("Got %"PRIu8" fds, expected one\n", rec->num_fds);
  39                 return false;
  40         }
  41
  42         fd = dup(rec->fds[0]);
  43         if (fd == -1) {
  44                 DBG_DEBUG("dup(%"PRIi64") failed: %s\n",
  45                           rec->fds[0],
  46                           strerror(errno));
  47                 return false;
  48         }
  49
  50         f = fdopen(fd, "w");
  51         if (f == NULL) {
  52                 DBG_DEBUG("fdopen failed: %s\n", strerror(errno));
  53                 close(fd);
  54                 return false;
  55         }
  56
  57         talloc_full_report_printf(NULL, f);
  58
  59         fclose(f);
  60         /*
  61          * Returning false, means messaging_dispatch_waiters()
  62          * won't call messaging_filtered_read_done() and
  63          * our messaging_filtered_read_send() stays alive
  64          * and will get messages.
  65          */
  66         return false;
  67 }
  68
  69 /**
  70  * Register handler for MSG_REQ_POOL_USAGE
  71  **/
  72 void register_msg_pool_usage(
  73         TALLOC_CTX *mem_ctx, struct messaging_context *msg_ctx)
  74 {
  75         struct tevent_req *req = NULL;
  76
  77         req = messaging_filtered_read_send(
  78                 mem_ctx,
  79                 messaging_tevent_context(msg_ctx),
  80                 msg_ctx,
  81                 pool_usage_filter,
  82                 NULL);
  83         if (req == NULL) {
  84                 DBG_WARNING("messaging_filtered_read_send failed\n");
  85                 return;
  86         }
  87         DEBUG(2, ("Registered MSG_REQ_POOL_USAGE\n"));
  88 }