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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
* E-mail:
* <brain@chatspike.net>
* <Craig@chatspike.net>
*
* Written by Craig Edwards, Craig McLure, and others.
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
using namespace std;
#include "inspircd_config.h"
#include "configreader.h"
#include "globals.h"
#include "dynamic.h"
#ifndef STATIC_LINK
#include <dlfcn.h>
#else
#include "modlist.h"
#endif
#include "inspstring.h"
#include "helperfuncs.h"
#include "inspircd.h"
#include <unistd.h>
#include <sys/types.h>
#include <stdio.h>
DLLManager::DLLManager(InspIRCd* ServerInstance, const char *fname)
{
err = NULL;
if (!strstr(fname,".so"))
{
err = "This doesn't look like a module file to me...";
return;
}
#ifdef STATIC_LINK
this->staticname[0] = '\0';
log(DEBUG,"Loading core-compiled module '%s'",fname);
for (int j = 0; modsyms[j].name; j++)
{
log(DEBUG,"Check %s",modsyms[j].name);
if (!strcmp(modsyms[j].name,fname))
{
log(DEBUG,"Found %s",fname);
strlcpy(this->staticname,fname,1020);
err = 0;
return;
}
}
err = "Module is not statically compiled into the ircd";
#else
// Copy the library to a temp location, this makes recompiles
// a little safer if the ircd is running at the time as the
// shared libraries are mmap()ed and not doing this causes
// segfaults.
FILE* x = fopen(fname,"rb");
if (!x)
{
err = strerror(errno);
return;
}
log(DEBUG,"Opened module file %s",fname);
char tmpfile_template[255];
char buffer[65536];
snprintf(tmpfile_template, 255, "%s/inspircd_file.so.%d.XXXXXXXXXX",ServerInstance->Config->TempDir,getpid());
int fd = mkstemp(tmpfile_template);
if (fd == -1)
{
fclose(x);
err = strerror(errno);
return;
}
log(DEBUG,"Copying %s to %s",fname, tmpfile_template);
while (!feof(x))
{
int n = fread(buffer, 1, 65535, x);
if (n)
{
int written = write(fd,buffer,n);
if (written != n)
{
fclose(x);
err = strerror(errno);
return;
}
}
}
log(DEBUG,"Copied entire file.");
// Try to open the library now and get any error message.
if (close(fd) == -1)
err = strerror(errno);
if (fclose(x) == EOF)
err = strerror(errno);
h = dlopen(fname, RTLD_NOW|RTLD_LOCAL);
if (!h)
{
log(DEBUG,"dlerror occured!");
err = (char*)dlerror();
return;
}
log(DEBUG,"Finished loading '%s': %0x",tmpfile_template, h);
// We can delete the tempfile once it's loaded, leaving just the inode.
if (!err && !ServerInstance->Config->debugging)
{
log(DEBUG,"Deleteting %s",tmpfile_template);
if (unlink(tmpfile_template) == -1)
err = strerror(errno);
}
#endif
}
DLLManager::~DLLManager()
{
#ifndef STATIC_LINK
// close the library if it isn't null
if (h)
dlclose(h);
#endif
}
#ifdef STATIC_LINK
bool DLLManager::GetSymbol(initfunc* &v, const char *sym_name)
{
for (int j = 0; modsyms[j].name; j++)
{
if (!strcmp(this->staticname,modsyms[j].name))
{
v = modsyms[j].value;
err = 0;
return true;
}
}
err = "Module symbol missing from the core";
return false;
}
#else
bool DLLManager::GetSymbol(void** v, const char* sym_name)
{
// try extract a symbol from the library
// get any error message is there is any
if (h)
{
dlerror(); // clear value
*v = dlsym(h, sym_name);
err = (char*)dlerror();
if (!*v || err)
return false;
}
if (err)
{
return false;
}
else
{
return true;
}
}
#endif
DLLFactoryBase::DLLFactoryBase(InspIRCd* Instance, const char* fname, const char* symbol) : DLLManager(Instance, fname)
{
// try get the factory function if there is no error yet
factory_func = 0;
if (!LastError())
{
#ifdef STATIC_LINK
if (!GetSymbol( factory_func, symbol ? symbol : "init_module"))
#else
if (!GetSymbol( (void **)&factory_func, symbol ? symbol : "init_module"))
#endif
{
throw ModuleException("Missing init_module() entrypoint!");
}
}
}
DLLFactoryBase::~DLLFactoryBase()
{
}
|
