Updating for 1.0.2 release
[awesomized/libmemcached] / 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 }