git.m6w6.name Git - awesomized/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 (not ret)
  52     ret= &unused;
  53
  54   memcached_st *memc_ptr= memcached_create(NULL);
  55   if (not memc_ptr)
  56   {
  57     *ret= MEMCACHED_MEMORY_ALLOCATION_FAILURE;
  58     return -1;
  59   }
  60
  61   memcached_return_t rc= memcached_server_add(memc_ptr, hostname, port);
  62   if (memcached_success(rc))
  63   {
  64     memcached_stat_st *stat= memcached_stat(memc_ptr, NULL, &rc);
  65     if (memcached_success(rc) and stat and stat->pid != -1)
  66     {
  67       pid= stat->pid;
  68     }
  69     else if (memcached_success(rc))
  70     {
  71       rc= MEMCACHED_UNKNOWN_STAT_KEY; // Something went wrong if this happens
  72     }
  73     else if (rc == MEMCACHED_SOME_ERRORS) // Generic answer, we will now find the specific reason (if one exists)
  74     {
  75       memcached_server_instance_st instance=
  76         memcached_server_instance_by_position(memc_ptr, 0);
  77
  78       assert_msg(instance and instance->error_messages, " ");
  79       if (instance and instance->error_messages)
  80       {
  81         rc= memcached_server_error_return(instance);
  82       }
  83     }
  84
  85     memcached_stat_free(memc_ptr, stat);
  86   }
  87   memcached_free(memc_ptr);
  88
  89   *ret= rc;
  90
  91   return pid;
  92 }
  93
  94 pid_t libmemcached_util_getpid2(const char *hostname, in_port_t port, const char *username, const char *password,  memcached_return_t *ret)
  95 {
  96   if (username == NULL)
  97   {
  98     return libmemcached_util_getpid(hostname, port, ret);
  99   }
 100
 101   pid_t pid= -1;
 102
 103   memcached_return_t unused;
 104   if (not ret)
 105     ret= &unused;
 106
 107   if (LIBMEMCACHED_WITH_SASL_SUPPORT == 0)
 108   {
 109     *ret= MEMCACHED_NOT_SUPPORTED;
 110     return pid;
 111   }
 112
 113   memcached_st *memc_ptr= memcached_create(NULL);
 114   if (not memc_ptr)
 115   {
 116     *ret= MEMCACHED_MEMORY_ALLOCATION_FAILURE;
 117     return -1;
 118   }
 119
 120   if (memcached_failed(*ret= memcached_set_sasl_auth_data(memc_ptr, username, password)))
 121   {
 122     memcached_free(memc_ptr);
 123     return false;
 124   }
 125
 126
 127   memcached_return_t rc= memcached_server_add(memc_ptr, hostname, port);
 128   if (memcached_success(rc))
 129   {
 130     memcached_stat_st *stat= memcached_stat(memc_ptr, NULL, &rc);
 131     if (memcached_success(rc) and stat and stat->pid != -1)
 132     {
 133       pid= stat->pid;
 134     }
 135     else if (memcached_success(rc))
 136     {
 137       rc= MEMCACHED_UNKNOWN_STAT_KEY; // Something went wrong if this happens
 138     }
 139     else if (rc == MEMCACHED_SOME_ERRORS) // Generic answer, we will now find the specific reason (if one exists)
 140     {
 141       memcached_server_instance_st instance=
 142         memcached_server_instance_by_position(memc_ptr, 0);
 143
 144 #if 0
 145       assert_msg(instance and instance->error_messages, " ");
 146 #endif
 147       if (instance and instance->error_messages)
 148       {
 149         rc= memcached_server_error_return(instance);
 150       }
 151     }
 152
 153     memcached_stat_free(memc_ptr, stat);
 154   }
 155   memcached_free(memc_ptr);
 156
 157   *ret= rc;
 158
 159   return pid;
 160 }