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
|
/*
* dl.c -- load/unload modules
*
* Copyright (C) 1999-2001 by Massimiliano Ghilardi
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#include <dlfcn.h>
#include "twin.h"
#include "methods.h"
#include "data.h"
#include "util.h"
#include "dl.h"
#include "version.h"
static void WrongVer(uldat ver) {
static byte buf[80];
sprintf(buf, "version mismatch: module is %d.%d.%d, this twin is " TWIN_VERSION_STR,
TWVER_MAJOR(ver), TWVER_MINOR(ver), TWVER_PATCH(ver));
ErrStr = buf;
}
byte DlOpen(module Module) {
void *Handle = NULL;
uldat len0 = LenStr(conf_destdir_lib_twin_modules_), len;
byte *name;
byte (*init_dl)(module);
uldat *version_dl;
if (Module && !Module->Handle && Module->Name && Module->NameLen) {
/* dlopen(NULL, ...) returns a handle for the main program */
if (Module->NameLen == 4 && !CmpMem(Module->Name, "main", 4))
name = NULL;
else {
len = len0 + Module->NameLen;
if ((name = AllocMem(len+1))) {
CopyMem(conf_destdir_lib_twin_modules_, name, len0);
CopyMem(Module->Name, name+len0, Module->NameLen);
name[len] = '\0';
} else
return FALSE;
}
Handle = dlopen(name, RTLD_NOW|RTLD_GLOBAL);
if (name)
FreeMem(name);
}
if (!Handle) {
Error(DLERROR);
ErrStr = dlerror();
return FALSE;
}
if (name) {
version_dl = dlsym(Handle, "VersionModule");
if (version_dl && *version_dl == TWIN_VERSION) {
init_dl = dlsym(Handle, "InitModule");
if (!init_dl || init_dl(Module)) {
Module->Handle = Handle;
return TRUE;
}
} else {
Error(USERERROR);
WrongVer(version_dl ? *version_dl : 0);
}
dlclose(Handle);
return FALSE;
}
return TRUE;
}
void DlClose(module Module) {
void (*quit_dl)(module);
if (Module && Module->Handle) {
if (Module->NameLen != 4 || CmpMem(Module->Name, "main", 4)) {
quit_dl = dlsym(Module->Handle, "QuitModule");
if (quit_dl)
quit_dl(Module);
}
dlclose(Module->Handle);
Module->Handle = NULL;
}
}
module DlLoadAny(uldat len, byte *name) {
module Module;
for (Module = All->FirstModule; Module; Module = Module->Next) {
if (len == Module->NameLen && !CmpMem(name, Module->Name, len))
/* already loaded! */
return Module;
}
if ((Module = Do(Create,Module)(FnModule, len, name))) {
if (Act(DlOpen,Module)(Module))
return Module;
Delete(Module);
}
return (module)0;
}
static module So[MAX_So];
module DlLoad(uldat code) {
module M;
if (code < MAX_So) {
if (!(M = So[code])) {
switch (code) {
#ifndef CONF_WM
case WMSo: M = DlLoadAny(5, "wm.so"); break;
#endif
#ifndef CONF_TERM
case TermSo: M = DlLoadAny(7, "term.so"); break;
#endif
#ifndef CONF_SOCKET
case SocketSo: M = DlLoadAny(9, "socket.so"); break;
#endif
#ifndef CONF_WM_RC
case RCParseSo: M = DlLoadAny(10, "rcparse.so"); break;
#endif
case MainSo:
default: M = DlLoadAny(4, "main"); break;
}
if ((So[code] = M)) {
if (All->FnHookModule)
All->FnHookModule(All->HookModule);
}
}
}
return M;
}
void DlUnLoad(uldat code) {
if (code < MAX_So) {
if (So[code]) {
Delete(So[code]);
So[code] = (module)0;
if (All->FnHookModule)
All->FnHookModule(All->HookModule);
}
}
}
module DlIsLoaded(uldat code) {
if (code < MAX_So)
return So[code];
return (module)0;
}
udat DlName2Code(byte *name) {
if (!CmpStr(name, "wm.so"))
return WMSo;
if (!CmpStr(name, "term.so"))
return TermSo;
if (!CmpStr(name, "socket.so"))
return SocketSo;
if (!CmpStr(name, "rcparse.so"))
return RCParseSo;
return MainSo;
}
|
