git.m6w6.name Git - m6w6/libmemcached/blob - libmemcachedutil/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 <libmemcachedutil/common.h>
  41
  42
  43 // Never look at the stat object directly.
  44
  45
  46 pid_t libmemcached_util_getpid(const char *hostname, in_port_t port, memcached_return_t *ret)
  47 {
  48   pid_t pid= -1;
  49
  50   memcached_return_t unused;
  51   if (ret == NULL)
  52   {
  53     ret= &unused;
  54   }
  55
  56   memcached_st *memc_ptr= memcached_create(NULL);
  57   if (memc_ptr == NULL)
  58   {
  59     *ret= MEMCACHED_MEMORY_ALLOCATION_FAILURE;
  60     return -1;
  61   }
  62
  63   memcached_return_t rc= memcached_server_add(memc_ptr, hostname, port);
  64   if (memcached_success(rc))
  65   {
  66     memcached_stat_st *stat= memcached_stat(memc_ptr, NULL, &rc);
  67     if (memcached_success(rc) and stat and stat->pid != -1)
  68     {
  69       pid= stat->pid;
  70     }
  71     else if (memcached_success(rc))
  72     {
  73       rc= MEMCACHED_UNKNOWN_STAT_KEY; // Something went wrong if this happens
  74     }
  75     else if (rc == MEMCACHED_SOME_ERRORS) // Generic answer, we will now find the specific reason (if one exists)
  76     {
  77       const memcached_instance_st * instance= memcached_server_instance_by_position(memc_ptr, 0);
  78
  79       assert_msg(instance and memcached_server_error(instance), " ");
  80       if (instance and memcached_server_error(instance))
  81       {
  82         rc= memcached_server_error_return(instance);
  83       }
  84     }
  85
  86     memcached_stat_free(memc_ptr, stat);
  87   }
  88   memcached_free(memc_ptr);
  89
  90   *ret= rc;
  91
  92   return pid;
  93 }
  94
  95 pid_t libmemcached_util_getpid2(const char *hostname, in_port_t port, const char *username, const char *password,  memcached_return_t *ret)
  96 {
  97   if (username == NULL)
  98   {
  99     return libmemcached_util_getpid(hostname, port, ret);
 100   }
 101
 102   pid_t pid= -1;
 103
 104   memcached_return_t unused;
 105   if (not ret)
 106     ret= &unused;
 107
 108   if (LIBMEMCACHED_WITH_SASL_SUPPORT == 0)
 109   {
 110     *ret= MEMCACHED_NOT_SUPPORTED;
 111     return pid;
 112   }
 113
 114   memcached_st *memc_ptr= memcached_create(NULL);
 115   if (not memc_ptr)
 116   {
 117     *ret= MEMCACHED_MEMORY_ALLOCATION_FAILURE;
 118     return -1;
 119   }
 120
 121   if (memcached_failed(*ret= memcached_set_sasl_auth_data(memc_ptr, username, password)))
 122   {
 123     memcached_free(memc_ptr);
 124     return false;
 125   }
 126
 127
 128   memcached_return_t rc= memcached_server_add(memc_ptr, hostname, port);
 129   if (memcached_success(rc))
 130   {
 131     memcached_stat_st *stat= memcached_stat(memc_ptr, NULL, &rc);
 132     if (memcached_success(rc) and stat and stat->pid != -1)
 133     {
 134       pid= stat->pid;
 135     }
 136     else if (memcached_success(rc))
 137     {
 138       rc= MEMCACHED_UNKNOWN_STAT_KEY; // Something went wrong if this happens
 139     }
 140     else if (rc == MEMCACHED_SOME_ERRORS) // Generic answer, we will now find the specific reason (if one exists)
 141     {
 142       const memcached_instance_st * instance=
 143         memcached_server_instance_by_position(memc_ptr, 0);
 144
 145 #if 0
 146       assert_msg(instance and instance->error_messages, " ");
 147 #endif
 148       if (instance and memcached_server_error(instance))
 149       {
 150         rc= memcached_server_error_return(instance);
 151       }
 152     }
 153
 154     memcached_stat_free(memc_ptr, stat);
 155   }
 156   memcached_free(memc_ptr);
 157
 158   *ret= rc;
 159
 160   return pid;
 161 }