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
|
/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001, 2002, 2005,
2007, 2008, 2009 Free Software Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301 USA */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef HAVE_LIBLTDL
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sieve-priv.h>
#include <ltdl.h>
#include <mailutils/cctype.h>
typedef int (*sieve_module_init_t) (mu_sieve_machine_t mach);
#if 0
/* FIXME: See comment below */
static void
_free_loaded_module (void *data)
{
lt_dlclose ((lt_dlhandle)data);
lt_dlexit ();
}
#endif
static int _add_load_dir (void *, void *);
static int
sieve_init_load_path ()
{
static int inited = 0;
if (!inited)
{
if (lt_dlinit ())
return 1;
#ifdef MU_SIEVE_MODDIR
_add_load_dir (MU_SIEVE_MODDIR, NULL);
inited = 1;
#endif
}
return 0;
}
static lt_dlhandle
load_module (mu_sieve_machine_t mach, const char *name)
{
lt_dlhandle handle;
if (sieve_init_load_path ())
return NULL;
handle = lt_dlopenext (name);
if (handle)
{
sieve_module_init_t init = (sieve_module_init_t)
lt_dlsym (handle, "init");
if (init)
{
init (mach);
/* FIXME: We used to have this:
mu_sieve_machine_add_destructor (mach, _free_loaded_module,
handle);
However, unloading modules can lead to random segfaults in
case they allocated any global-access data (e.g. mach->msg).
In particular, this was the case with extensions/pipe.c.
*/
return handle;
}
else
{
lt_dlclose (handle);
handle = NULL;
}
}
if (!handle)
{
mu_sieve_error (mach, "%s: %s", name, lt_dlerror ());
lt_dlexit ();
}
return handle;
}
static void
fix_module_name (char *name)
{
for (; *name; name++)
{
if (mu_isalnum (*name) || *name == '.' || *name == ',')
continue;
*name = '-';
}
}
int
mu_sieve_load_ext (mu_sieve_machine_t mach, const char *name)
{
lt_dlhandle handle;
char *modname;
modname = strdup (name);
if (!modname)
return 1;
fix_module_name (modname);
handle = load_module (mach, modname);
free (modname);
return handle == NULL;
}
static int
_add_load_dir (void *item, void *unused)
{
return lt_dladdsearchdir (item);
}
int
mu_sv_load_add_path (mu_list_t path)
{
if (sieve_init_load_path ())
return 1;
return mu_list_do (path, _add_load_dir, NULL);
}
int
mu_sv_load_add_dir (mu_sieve_machine_t mach, const char *name)
{
if (sieve_init_load_path ())
return 1;
mu_sieve_machine_add_destructor (mach, (mu_sieve_destructor_t) lt_dlexit,
NULL);
return lt_dladdsearchdir (name);
}
#else
#include <sieve-priv.h>
int
mu_sieve_load_ext (mu_sieve_machine_t mach, const char *name)
{
return 1;
}
int
mu_sv_load_add_path (mu_list_t path)
{
return 1;
}
int
mu_sv_load_add_dir (mu_sieve_machine_t mach, const char *name)
{
return 1;
}
#endif /* HAVE_LIBLTDL */
|
