1 /*
2 * SysDB - src/daemon/config.c
3 * Copyright (C) 2012 Sebastian 'tokkee' Harl <sh@tokkee.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
28 #include "sysdb.h"
29 #include "core/plugin.h"
30 #include "utils/error.h"
31 #include "utils/time.h"
33 #include "daemon/config.h"
35 #include "liboconfig/oconfig.h"
36 #include "liboconfig/utils.h"
38 #include <assert.h>
39 #include <strings.h>
41 /*
42 * private variables
43 */
45 static sdb_time_t default_interval = 0;
47 /*
48 * private helper functions
49 */
51 static int
52 config_get_interval(oconfig_item_t *ci, sdb_time_t *interval)
53 {
54 double interval_dbl = 0.0;
56 assert(ci && interval);
58 if (oconfig_get_number(ci, &interval_dbl)) {
59 sdb_log(SDB_LOG_ERR, "config: Interval requires "
60 "a single numeric argument\n"
61 "\tUsage: Interval SECONDS");
62 return -1;
63 }
65 if (interval_dbl <= 0.0) {
66 sdb_log(SDB_LOG_ERR, "config: Invalid interval: %f\n"
67 "\tInterval may not be less than or equal to zero.",
68 interval_dbl);
69 return -1;
70 }
72 *interval = DOUBLE_TO_SDB_TIME(interval_dbl);
73 return 0;
74 } /* config_get_interval */
76 /*
77 * token parser
78 */
80 typedef struct {
81 char *name;
82 int (*dispatcher)(oconfig_item_t *);
83 } token_parser_t;
85 static int
86 daemon_set_interval(oconfig_item_t *ci)
87 {
88 return config_get_interval(ci, &default_interval);
89 } /* daemon_set_interval */
91 static int
92 daemon_load_backend(oconfig_item_t *ci)
93 {
94 char plugin_name[1024];
95 char *name;
97 sdb_plugin_ctx_t ctx = SDB_PLUGIN_CTX_INIT;
98 sdb_plugin_ctx_t old_ctx;
100 int status, i;
102 ctx.interval = default_interval;
104 if (oconfig_get_string(ci, &name)) {
105 sdb_log(SDB_LOG_ERR, "config: LoadBackend requires a single "
106 "string argument\n"
107 "\tUsage: LoadBackend BACKEND");
108 return -1;
109 }
111 snprintf(plugin_name, sizeof(plugin_name), "backend::%s", name);
113 for (i = 0; i < ci->children_num; ++i) {
114 oconfig_item_t *child = ci->children + i;
116 if (! strcasecmp(child->key, "Interval")) {
117 if (config_get_interval(child, &ctx.interval))
118 return -1;
119 }
120 else {
121 sdb_log(SDB_LOG_WARNING, "config: Unknown option '%s' "
122 "inside 'LoadBackend' -- see the documentation for "
123 "details.", child->key);
124 continue;
125 }
126 }
128 old_ctx = sdb_plugin_set_ctx(ctx);
129 status = sdb_plugin_load(plugin_name);
130 sdb_plugin_set_ctx(old_ctx);
131 return status;
132 } /* daemon_load_backend */
134 static int
135 daemon_configure_plugin(oconfig_item_t *ci)
136 {
137 char *name;
139 assert(ci);
141 if (oconfig_get_string(ci, &name)) {
142 sdb_log(SDB_LOG_ERR, "config: %s requires a single "
143 "string argument\n"
144 "\tUsage: LoadBackend BACKEND",
145 ci->key);
146 return -1;
147 }
149 return sdb_plugin_configure(name, ci);
150 } /* daemon_configure_backend */
152 static token_parser_t token_parser_list[] = {
153 { "Interval", daemon_set_interval },
154 { "LoadBackend", daemon_load_backend },
155 { "Backend", daemon_configure_plugin },
156 { "Plugin", daemon_configure_plugin },
157 { NULL, NULL },
158 };
160 /*
161 * public API
162 */
164 int
165 daemon_parse_config(const char *filename)
166 {
167 oconfig_item_t *ci;
168 int retval = 0, i;
170 ci = oconfig_parse_file(filename);
171 if (! ci)
172 return -1;
174 for (i = 0; i < ci->children_num; ++i) {
175 oconfig_item_t *child = ci->children + i;
176 int status = 1, j;
178 for (j = 0; token_parser_list[j].name; ++j) {
179 if (! strcasecmp(token_parser_list[j].name, child->key))
180 status = token_parser_list[j].dispatcher(child);
181 }
183 if (status) {
184 sdb_error_set("config: Failed to parse option '%s'\n",
185 child->key);
186 if (status > 0)
187 sdb_error_append("\tUnknown option '%s' -- "
188 "see the documentation for details\n",
189 child->key);
190 sdb_error_log(SDB_LOG_ERR);
191 retval = -1;
192 }
193 }
194 return retval;
195 } /* daemon_parse_config */
197 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */