docs: cmake build
[m6w6/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 (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 }