git.m6w6.name Git - m6w6/libmemcached/blob - libmemcached/util/pid.cc

   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  Libmemcached library
   4  *
   5  *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
   6  *  Copyright (C) 2010 Brian Aker All rights reserved.
   7  *
   8  *  Redistribution and use in source and binary forms, with or without
   9  *  modification, are permitted provided that the following conditions are
  10  *  met:
  11  *
  12  *      * Redistributions of source code must retain the above copyright
  13  *  notice, this list of conditions and the following disclaimer.
  14  *
  15  *      * Redistributions in binary form must reproduce the above
  16  *  copyright notice, this list of conditions and the following disclaimer
  17  *  in the documentation and/or other materials provided with the
  18  *  distribution.
  19  *
  20  *      * The names of its contributors may not be used to endorse or
  21  *  promote products derived from this software without specific prior
  22  *  written permission.
  23  *
  24  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  25  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  26  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  27  *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  28  *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  29  *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  30  *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  31  *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  32  *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  34  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  *
  36  * Summary: connects to a host, and determines what its pid is
  37  *
  38  */
  39
  40 #include <libmemcached/common.h>
  41 #include <libmemcached/memcached_util.h>
  42
  43
  44 // Never look at the stat object directly.
  45
  46
  47 pid_t libmemcached_util_getpid(const char *hostname, in_port_t port, memcached_return_t *ret)
  48 {
  49   memcached_st *memc_ptr= memcached_create(NULL);
  50
  51   pid_t pid= -1;
  52
  53   memcached_return_t rc= memcached_server_add(memc_ptr, hostname, port);
  54   if (memcached_success(rc))
  55   {
  56     if (memcached_success(memcached_version(memc_ptr)))
  57     {
  58       memcached_stat_st *stat= memcached_stat(memc_ptr, NULL, &rc);
  59       if (stat and stat->pid > 0)
  60       {
  61         pid= stat->pid;
  62       }
  63
  64       memcached_stat_free(memc_ptr, stat);
  65     }
  66   }
  67   memcached_free(memc_ptr);
  68
  69   if (ret)
  70   {
  71     *ret= rc;
  72   }
  73
  74   return pid;
  75 }
  76