1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/* Copyright (c) 2002-2018 Pigeonhole authors, see the included COPYING file
*/
#include "lib.h"
#include "str.h"
#include "module-dir.h"
#include "sieve-settings.h"
#include "sieve-extensions.h"
#include "sieve-common.h"
#include "sieve-plugins.h"
/*
* Types
*/
typedef void (*sieve_plugin_load_func_t)
(struct sieve_instance *svinst, void **context);
typedef void (*sieve_plugin_unload_func_t)
(struct sieve_instance *svinst, void *context);
struct sieve_plugin {
struct module *module;
void *context;
struct sieve_plugin *next;
};
/*
* Plugin support
*/
static struct module *sieve_modules = NULL;
static int sieve_modules_refcount = 0;
static struct module *sieve_plugin_module_find(const char *name)
{
struct module *module;
module = sieve_modules;
while ( module != NULL ) {
const char *mod_name;
/* Strip module names */
mod_name = module_get_plugin_name(module);
if ( strcmp(mod_name, name) == 0 )
return module;
module = module->next;
}
return NULL;
}
void sieve_plugins_load
(struct sieve_instance *svinst, const char *path, const char *plugins)
{
struct module *module;
struct module_dir_load_settings mod_set;
const char **module_names;
unsigned int i;
/* Determine what to load */
if ( path == NULL && plugins == NULL ) {
path = sieve_setting_get(svinst, "sieve_plugin_dir");
plugins = sieve_setting_get(svinst, "sieve_plugins");
}
if ( plugins == NULL || *plugins == '\0' )
return;
if ( path == NULL || *path == '\0' )
path = MODULEDIR"/sieve";
i_zero(&mod_set);
mod_set.abi_version = PIGEONHOLE_ABI_VERSION;
mod_set.require_init_funcs = TRUE;
mod_set.debug = FALSE;
/* Load missing plugin modules */
sieve_modules = module_dir_load_missing
(sieve_modules, path, plugins, &mod_set);
/* Call plugin load functions for this Sieve instance */
if ( svinst->plugins == NULL ) {
sieve_modules_refcount++;
}
module_names = t_strsplit_spaces(plugins, ", ");
for (i = 0; module_names[i] != NULL; i++) {
/* Allow giving the module names also in non-base form. */
module_names[i] = module_file_get_name(module_names[i]);
}
for (i = 0; module_names[i] != NULL; i++) {
struct sieve_plugin *plugin;
const char *name = module_names[i];
sieve_plugin_load_func_t load_func;
/* Find the module */
module = sieve_plugin_module_find(name);
i_assert(module != NULL);
/* Check whether the plugin is already loaded in this instance */
plugin = svinst->plugins;
while ( plugin != NULL ) {
if ( plugin->module == module )
break;
plugin = plugin->next;
}
/* Skip it if it is loaded already */
if ( plugin != NULL )
continue;
/* Create plugin list item */
plugin = p_new(svinst->pool, struct sieve_plugin, 1);
plugin->module = module;
/* Call load function */
load_func = (sieve_plugin_load_func_t) module_get_symbol
(module, t_strdup_printf("%s_load", module->name));
if ( load_func != NULL ) {
load_func(svinst, &plugin->context);
}
/* Add plugin to the instance */
if ( svinst->plugins == NULL )
svinst->plugins = plugin;
else {
struct sieve_plugin *plugin_last;
plugin_last = svinst->plugins;
while ( plugin_last->next != NULL )
plugin_last = plugin_last->next;
plugin_last->next = plugin;
}
}
}
void sieve_plugins_unload(struct sieve_instance *svinst)
{
struct sieve_plugin *plugin;
if ( svinst->plugins == NULL )
return;
/* Call plugin unload functions for this instance */
plugin = svinst->plugins;
while ( plugin != NULL ) {
struct module *module = plugin->module;
sieve_plugin_unload_func_t unload_func;
unload_func = (sieve_plugin_unload_func_t)module_get_symbol
(module, t_strdup_printf("%s_unload", module->name));
if ( unload_func != NULL ) {
unload_func(svinst, plugin->context);
}
plugin = plugin->next;
}
/* Physically unload modules */
i_assert(sieve_modules_refcount > 0);
if ( --sieve_modules_refcount != 0 )
return;
module_dir_unload(&sieve_modules);
}
|
