ircd-hybrid/src/dynlink.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  dynlink.c: A module loader.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  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.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 * $Id$
 *
 */
#include "stdinc.h"
#include "modules.h"
#include "client.h"
#include "send.h"

#ifndef RTLD_NOW
#define RTLD_NOW RTLD_LAZY /* openbsd deficiency */
#endif

extern dlink_list mod_list;

static char unknown_ver[] = "<unknown>";

/* This file contains the core functions to use dynamic libraries.
 * -TimeMr14C
 */

#ifdef _WIN32
/*
 * jmallett's dl*(3) stubs for DLL management.
 */

#define RTLD_LAZY 0

char *
dlerror(void)
{
  static char errbuf[IRCD_BUFSIZE];
  char *p;

  FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(),
    MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), errbuf, sizeof(errbuf), NULL);

  if ((p = strpbrk(errbuf, "\r\n")) != NULL)
    *p = 0;

  return errbuf;
}

void *
dlopen(char *filename, int unused)
{
  return LoadLibrary(filename);
}

int
dlclose(void *module)
{
  return FreeLibrary((HMODULE) module) ? 0 : -1;
}

void *
dlsym(void *module, const char *sym)
{
  return GetProcAddress((HMODULE) module, sym);
}
#endif

#ifdef HAVE_MACH_O_DYLD_H
/*
** jmallett's dl*(3) shims for NSModule(3) systems.
*/
#include <mach-o/dyld.h>

#ifndef HAVE_DLOPEN
#ifndef RTLD_LAZY
#define RTLD_LAZY 2185 /* built-in dl*(3) don't care */
#endif

void undefinedErrorHandler(const char *);
NSModule multipleErrorHandler(NSSymbol, NSModule, NSModule);
void linkEditErrorHandler(NSLinkEditErrors, int, const char *, const char *);
char *dlerror(void);
void *dlopen(char *, int);
int dlclose(void *);
void *dlsym(void *, char *);

static int firstLoad = TRUE;
static int myDlError;
static const char *myErrorTable[] =
{
  "Loading file as object failed\n",
  "Loading file as object succeeded\n",
  "Not a valid shared object\n",
  "Architecture of object invalid on this architecture\n",
  "Invalid or corrupt image\n",
  "Could not access object\n",
  "NSCreateObjectFileImageFromFile failed\n",
  NULL
};

void
undefinedErrorHandler(const char *symbolName)
{
  sendto_realops_flags(UMODE_ALL, L_ALL, "Undefined symbol: %s", symbolName);
  ilog(L_WARN, "Undefined symbol: %s", symbolName);
}

NSModule
multipleErrorHandler(NSSymbol s, NSModule old, NSModule new)
{
  /* XXX
  ** This results in substantial leaking of memory... Should free one
  ** module, maybe?
  */
  sendto_realops_flags(UMODE_ALL, L_ALL, "Symbol `%s' found in `%s' and `%s'",
                       NSNameOfSymbol(s), NSNameOfModule(old), NSNameOfModule(new));
  ilog(L_WARN, "Symbol `%s' found in `%s' and `%s'", NSNameOfSymbol(s),
       NSNameOfModule(old), NSNameOfModule(new));
  /* We return which module should be considered valid, I believe */
  return new;
}

void
linkEditErrorHandler(NSLinkEditErrors errorClass, int errnum,
                     const char *fileName, const char *errorString)
{
  sendto_realops_flags(UMODE_ALL, L_ALL, "Link editor error: %s for %s",
                       errorString, fileName);
  ilog(L_WARN, "Link editor error: %s for %s", errorString, fileName);
  return;
}

char *
dlerror(void)
{
  return(myDlError == NSObjectFileImageSuccess ? NULL : myErrorTable[myDlError % 7]);
}

void *
dlopen(char *filename, int unused)
{
  NSObjectFileImage myImage;
  NSModule myModule;

  if (firstLoad)
  {
    /* If we are loading our first symbol (huzzah!) we should go ahead
     * and install link editor error handling!
     */
    NSLinkEditErrorHandlers linkEditorErrorHandlers;

    linkEditorErrorHandlers.undefined = undefinedErrorHandler;
    linkEditorErrorHandlers.multiple  = multipleErrorHandler;
    linkEditorErrorHandlers.linkEdit  = linkEditErrorHandler;
    NSInstallLinkEditErrorHandlers(&linkEditorErrorHandlers);
    firstLoad = FALSE;
  }

  myDlError = NSCreateObjectFileImageFromFile(filename, &myImage);

  if (myDlError != NSObjectFileImageSuccess)
    return(NULL);

  myModule = NSLinkModule(myImage, filename, NSLINKMODULE_OPTION_PRIVATE);
  return((void *)myModule);
}

int
dlclose(void *myModule)
{
  NSUnLinkModule(myModule, FALSE);
  return(0);
}

void *
dlsym(void *myModule, char *mySymbolName)
{
  NSSymbol mySymbol;

  mySymbol = NSLookupSymbolInModule((NSModule)myModule, mySymbolName);
  return NSAddressOfSymbol(mySymbol);
}
#endif
#endif

#if !defined(HAVE_SHL_LOAD) && !defined(HAVE_DLFUNC)
/*
 * Fake dlfunc(3) if we don't have it, cause it's happy.
 */
typedef void (*__function_p)(void);

static __function_p
dlfunc(void *myHandle, const char *functionName)
{
  /* XXX This is not guaranteed to work, but with
   * traditional dl*(3), it is the best we can do.
   * -jmallett
   */
  void *symbolp;

  symbolp = dlsym(myHandle, functionName);
  return((__function_p)symbolp);
}
#endif

/* unload_one_module()
 *
 * inputs       - name of module to unload
 *              - 1 to say modules unloaded, 0 to not
 * output       - 0 if successful, -1 if error
 * side effects - module is unloaded
 */
int
unload_one_module(char *name, int warn)
{
  dlink_node *ptr = NULL;
  struct module *modp = NULL;

  if ((ptr = findmodule_byname(name)) == NULL) 
    return -1;

  modp = ptr->data;

  if (modp->modremove)
    (*modp->modremove)();

#ifdef HAVE_SHL_LOAD
    /* shl_* and friends have a slightly different format than dl*. But it does not
     * require creation of a totally new modules.c, instead proper usage of
     * defines solve this case. -TimeMr14C
     */
  shl_unload((shl_t) & (modp->handle));
#else
  /* We use FreeBSD's dlfunc(3) interface, or fake it as we
   * used to here if it isn't there.  The interface should
   * be standardised some day, and so it eventually will be
   * providing something guaranteed to do the right thing here.
   *          -jmallett
   */
  dlclose(modp->handle);
#endif
  assert(dlink_list_length(&mod_list) > 0);
  dlinkDelete(ptr, &mod_list);
  MyFree(modp->name);
  MyFree(modp);

  if (warn == 1)
  {
    ilog(L_INFO, "Module %s unloaded", name);
    sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s unloaded", name);
  }

  return 0;
}

/* load_a_module()
 *
 * inputs       - path name of module, int to notice, int of core
 * output       - -1 if error 0 if success
 * side effects - loads a module if successful
 */
int
load_a_module(char *path, int warn, int core)
{
#ifdef HAVE_DLINFO
  Link_map *map;
#endif
#ifdef HAVE_SHL_LOAD
  shl_t tmpptr;
#else
  void *tmpptr = NULL;
#endif
  void *addr = NULL;
  char *mod_basename;
  void (*initfunc)(void) = NULL;
  void (*mod_deinit)(void) = NULL;
  char **verp;
  char *ver;
  struct module *modp;

  mod_basename = basename(path);

  if (findmodule_byname(mod_basename) != NULL)
    return(1);

#ifdef HAVE_SHL_LOAD
  tmpptr = shl_load(path, BIND_IMMEDIATE, NULL);
#else
  tmpptr = dlopen(path, RTLD_NOW);
#endif

  if (tmpptr == NULL)
  {
#ifdef HAVE_SHL_LOAD
    const char *err = strerror(errno);
#else
    const char *err = dlerror();
#endif
    sendto_realops_flags(UMODE_ALL, L_ALL, "Error loading module %s: %s",
                         mod_basename, err);
    ilog(L_WARN, "Error loading module %s: %s", mod_basename, err);
    
    return(-1);
  }

#ifdef HAVE_SHL_LOAD
  if (shl_findsym(&tmpptr, "_modinit", TYPE_UNDEFINED, (void *)&initfunc) == -1)
  {
    if (shl_findsym(&tmpptr, "__modinit", TYPE_UNDEFINED, (void *)&initfunc) == -1)
    {
      ilog(L_WARN, "Module %s has no _modinit() function", mod_basename);
      sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no _modinit() function",
                           mod_basename);
      shl_unload(tmpptr);
      return(-1);
    }
  }

  if (shl_findsym(&tmpptr, "_moddeinit", TYPE_UNDEFINED, (void *)&mod_deinit) == -1)
  {
    if (shl_findsym(&tmpptr, "__moddeinit", TYPE_UNDEFINED, (void *)&mod_deinit) == -1)
    {
      ilog(L_WARN, "Module %s has no _moddeinit() function", mod_basename);
      sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no _moddeinit() function",
                           mod_basename);
      /* this is a soft error.  we're allowed not to have one, i guess.
       * (judging by the code in unload_one_module() */
      mod_deinit = NULL;
    }
  }

  if (shl_findsym(&tmpptr, "_version", TYPE_UNDEFINED, &verp) == -1)
  {
    if (shl_findsym(&tmpptr, "__version", TYPE_UNDEFINED, &verp) == -1)
      ver = unknown_ver;
    else
      ver = *verp;
  }
  else
    ver = *verp;
#else
  if ((initfunc = (void(*)(void))dlfunc(tmpptr, "_modinit")) == NULL &&
      /* Only for compatibility, because some systems have underscore
       * prepended symbol names */
      (initfunc = (void(*)(void))dlfunc(tmpptr, "__modinit")) == NULL)
  {
    sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no _modinit() function",
                         mod_basename);
    ilog(L_WARN, "Module %s has no _modinit() function", mod_basename);
    dlclose(tmpptr);
    return(-1);
  }

  mod_deinit = (void(*)(void))dlfunc(tmpptr, "_moddeinit");

  if (mod_deinit == NULL && (mod_deinit = (void(*)(void))dlfunc(tmpptr, "__moddeinit")) == NULL)
  {
    sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no _moddeinit() function",
                         mod_basename);
    ilog(L_WARN, "Module %s has no _moddeinit() function", mod_basename);
    /* blah blah soft error, see above. */
    mod_deinit = NULL;
  }

  verp = (char **)dlsym(tmpptr, "_version");

  if (verp == NULL && (verp = (char **)dlsym(tmpptr, "__version")) == NULL)
    ver = unknown_ver;
  else
    ver = *verp;
#endif

  
  modp            = MyMalloc(sizeof(struct module));
#ifdef HAVE_DLINFO
  dlinfo(tmpptr, RTLD_DI_LINKMAP, &map);
  if (map != NULL)
    addr = map->l_addr;
  else
    addr = tmpptr;
#endif

  modp->handle    = tmpptr;
  modp->address   = addr;
  modp->version   = ver;
  modp->core      = core;
  modp->modremove = mod_deinit;

  DupString(modp->name, mod_basename);
  dlinkAdd(modp, &modp->node, &mod_list);

  initfunc();

  if (warn == 1)
  {
    sendto_realops_flags(UMODE_ALL, L_ALL,
                         "Module %s [version: %s] loaded at %p",
                         mod_basename, ver, addr);
    ilog(L_WARN, "Module %s [version: %s] loaded at %p",
         mod_basename, ver, addr);
  }

  return(0);
}
Revision:	188
Committed:	Sun Oct 23 20:40:34 2005 UTC (20 years, 9 months ago) by adx
Content type:	text/x-csrc
File size:	10864 byte(s)
Log Message:	* compile dynamic modules under win32
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* dynlink.c: A module loader.
4			*
5			* Copyright (C) 2002 by the past and present ircd coders, and others.
6			*
7			* This program is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License as published by
9			* the Free Software Foundation; either version 2 of the License, or
10			* (at your option) any later version.
11			*
12			* This program is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License
18			* along with this program; if not, write to the Free Software
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20			* USA
21			*
22	knight	31	* $Id$
23	adx	30	*
24			*/
25			#include "stdinc.h"
26			#include "modules.h"
27			#include "client.h"
28			#include "send.h"
29
30			#ifndef RTLD_NOW
31			#define RTLD_NOW RTLD_LAZY /* openbsd deficiency */
32			#endif
33
34			extern dlink_list mod_list;
35
36			static char unknown_ver[] = "<unknown>";
37
38			/* This file contains the core functions to use dynamic libraries.
39			* -TimeMr14C
40			*/
41
42	adx	185	#ifdef _WIN32
43			/*
44			* jmallett's dl*(3) stubs for DLL management.
45			*/
46
47	adx	188	#define RTLD_LAZY 0
48
49	adx	185	char *
50			dlerror(void)
51			{
52			static char errbuf[IRCD_BUFSIZE];
53	adx	188	char *p;
54	adx	185
55			FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(),
56			MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), errbuf, sizeof(errbuf), NULL);
57
58	adx	188	if ((p = strpbrk(errbuf, "\r\n")) != NULL)
59			*p = 0;
60
61	adx	185	return errbuf;
62			}
63
64			void *
65			dlopen(char *filename, int unused)
66			{
67			return LoadLibrary(filename);
68			}
69
70			int
71			dlclose(void *module)
72			{
73			return FreeLibrary((HMODULE) module) ? 0 : -1;
74			}
75
76			void *
77	adx	188	dlsym(void module, const char sym)
78	adx	185	{
79			return GetProcAddress((HMODULE) module, sym);
80			}
81			#endif
82
83	adx	30	#ifdef HAVE_MACH_O_DYLD_H
84			/*
85			** jmallett's dl*(3) shims for NSModule(3) systems.
86			*/
87			#include <mach-o/dyld.h>
88
89			#ifndef HAVE_DLOPEN
90			#ifndef RTLD_LAZY
91			#define RTLD_LAZY 2185 /* built-in dl(3) don't care /
92			#endif
93
94			void undefinedErrorHandler(const char *);
95			NSModule multipleErrorHandler(NSSymbol, NSModule, NSModule);
96			void linkEditErrorHandler(NSLinkEditErrors, int, const char , const char );
97			char *dlerror(void);
98			void dlopen(char , int);
99			int dlclose(void *);
100			void dlsym(void , char *);
101
102			static int firstLoad = TRUE;
103			static int myDlError;
104			static const char *myErrorTable[] =
105			{
106			"Loading file as object failed\n",
107			"Loading file as object succeeded\n",
108			"Not a valid shared object\n",
109			"Architecture of object invalid on this architecture\n",
110			"Invalid or corrupt image\n",
111			"Could not access object\n",
112			"NSCreateObjectFileImageFromFile failed\n",
113			NULL
114			};
115
116			void
117			undefinedErrorHandler(const char *symbolName)
118			{
119			sendto_realops_flags(UMODE_ALL, L_ALL, "Undefined symbol: %s", symbolName);
120			ilog(L_WARN, "Undefined symbol: %s", symbolName);
121			}
122
123			NSModule
124			multipleErrorHandler(NSSymbol s, NSModule old, NSModule new)
125			{
126			/* XXX
127			** This results in substantial leaking of memory... Should free one
128			** module, maybe?
129			*/
130			sendto_realops_flags(UMODE_ALL, L_ALL, "Symbol `%s' found in `%s' and `%s'",
131			NSNameOfSymbol(s), NSNameOfModule(old), NSNameOfModule(new));
132			ilog(L_WARN, "Symbol `%s' found in `%s' and `%s'", NSNameOfSymbol(s),
133			NSNameOfModule(old), NSNameOfModule(new));
134			/* We return which module should be considered valid, I believe */
135	adx	185	return new;
136	adx	30	}
137
138			void
139			linkEditErrorHandler(NSLinkEditErrors errorClass, int errnum,
140			const char fileName, const char errorString)
141			{
142			sendto_realops_flags(UMODE_ALL, L_ALL, "Link editor error: %s for %s",
143			errorString, fileName);
144			ilog(L_WARN, "Link editor error: %s for %s", errorString, fileName);
145			return;
146			}
147
148			char *
149			dlerror(void)
150			{
151			return(myDlError == NSObjectFileImageSuccess ? NULL : myErrorTable[myDlError % 7]);
152			}
153
154			void *
155			dlopen(char *filename, int unused)
156			{
157			NSObjectFileImage myImage;
158			NSModule myModule;
159
160			if (firstLoad)
161			{
162			/* If we are loading our first symbol (huzzah!) we should go ahead
163			* and install link editor error handling!
164			*/
165			NSLinkEditErrorHandlers linkEditorErrorHandlers;
166
167			linkEditorErrorHandlers.undefined = undefinedErrorHandler;
168			linkEditorErrorHandlers.multiple = multipleErrorHandler;
169			linkEditorErrorHandlers.linkEdit = linkEditErrorHandler;
170			NSInstallLinkEditErrorHandlers(&linkEditorErrorHandlers);
171			firstLoad = FALSE;
172			}
173
174			myDlError = NSCreateObjectFileImageFromFile(filename, &myImage);
175
176			if (myDlError != NSObjectFileImageSuccess)
177			return(NULL);
178
179			myModule = NSLinkModule(myImage, filename, NSLINKMODULE_OPTION_PRIVATE);
180			return((void *)myModule);
181			}
182
183			int
184			dlclose(void *myModule)
185			{
186			NSUnLinkModule(myModule, FALSE);
187			return(0);
188			}
189
190			void *
191			dlsym(void myModule, char mySymbolName)
192			{
193			NSSymbol mySymbol;
194
195			mySymbol = NSLookupSymbolInModule((NSModule)myModule, mySymbolName);
196			return NSAddressOfSymbol(mySymbol);
197			}
198			#endif
199			#endif
200
201	adx	188	#if !defined(HAVE_SHL_LOAD) && !defined(HAVE_DLFUNC)
202			/*
203			* Fake dlfunc(3) if we don't have it, cause it's happy.
204			*/
205			typedef void (*__function_p)(void);
206
207			static __function_p
208			dlfunc(void myHandle, const char functionName)
209			{
210			/* XXX This is not guaranteed to work, but with
211			* traditional dl*(3), it is the best we can do.
212			* -jmallett
213			*/
214			void *symbolp;
215
216			symbolp = dlsym(myHandle, functionName);
217			return((__function_p)symbolp);
218			}
219			#endif
220
221	adx	30	/* unload_one_module()
222			*
223			* inputs - name of module to unload
224			* - 1 to say modules unloaded, 0 to not
225			* output - 0 if successful, -1 if error
226			* side effects - module is unloaded
227			*/
228			int
229			unload_one_module(char *name, int warn)
230			{
231			dlink_node *ptr = NULL;
232			struct module *modp = NULL;
233
234			if ((ptr = findmodule_byname(name)) == NULL)
235			return -1;
236
237			modp = ptr->data;
238
239			if (modp->modremove)
240			(*modp->modremove)();
241
242			#ifdef HAVE_SHL_LOAD
243			/* shl_* and friends have a slightly different format than dl*. But it does not
244			* require creation of a totally new modules.c, instead proper usage of
245			* defines solve this case. -TimeMr14C
246			*/
247	db	186	shl_unload((shl_t) & (modp->handle));
248	adx	30	#else
249			/* We use FreeBSD's dlfunc(3) interface, or fake it as we
250			* used to here if it isn't there. The interface should
251			* be standardised some day, and so it eventually will be
252			* providing something guaranteed to do the right thing here.
253			* -jmallett
254			*/
255	db	186	dlclose(modp->handle);
256	adx	30	#endif
257			assert(dlink_list_length(&mod_list) > 0);
258			dlinkDelete(ptr, &mod_list);
259			MyFree(modp->name);
260			MyFree(modp);
261
262			if (warn == 1)
263			{
264			ilog(L_INFO, "Module %s unloaded", name);
265			sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s unloaded", name);
266			}
267
268			return 0;
269			}
270
271			/* load_a_module()
272			*
273			* inputs - path name of module, int to notice, int of core
274			* output - -1 if error 0 if success
275			* side effects - loads a module if successful
276			*/
277			int
278			load_a_module(char *path, int warn, int core)
279			{
280	db	165	#ifdef HAVE_DLINFO
281	db	164	Link_map *map;
282			#endif
283	adx	30	#ifdef HAVE_SHL_LOAD
284			shl_t tmpptr;
285			#else
286			void *tmpptr = NULL;
287			#endif
288	db	165	void *addr = NULL;
289	adx	30	char *mod_basename;
290			void (*initfunc)(void) = NULL;
291			void (*mod_deinit)(void) = NULL;
292			char **verp;
293			char *ver;
294			struct module *modp;
295
296			mod_basename = basename(path);
297
298			if (findmodule_byname(mod_basename) != NULL)
299			return(1);
300
301			#ifdef HAVE_SHL_LOAD
302			tmpptr = shl_load(path, BIND_IMMEDIATE, NULL);
303			#else
304			tmpptr = dlopen(path, RTLD_NOW);
305			#endif
306
307			if (tmpptr == NULL)
308			{
309			#ifdef HAVE_SHL_LOAD
310			const char *err = strerror(errno);
311			#else
312			const char *err = dlerror();
313			#endif
314			sendto_realops_flags(UMODE_ALL, L_ALL, "Error loading module %s: %s",
315			mod_basename, err);
316			ilog(L_WARN, "Error loading module %s: %s", mod_basename, err);
317
318			return(-1);
319			}
320
321			#ifdef HAVE_SHL_LOAD
322			if (shl_findsym(&tmpptr, "_modinit", TYPE_UNDEFINED, (void *)&initfunc) == -1)
323			{
324			if (shl_findsym(&tmpptr, "__modinit", TYPE_UNDEFINED, (void *)&initfunc) == -1)
325			{
326			ilog(L_WARN, "Module %s has no _modinit() function", mod_basename);
327			sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no _modinit() function",
328			mod_basename);
329			shl_unload(tmpptr);
330			return(-1);
331			}
332			}
333
334			if (shl_findsym(&tmpptr, "_moddeinit", TYPE_UNDEFINED, (void *)&mod_deinit) == -1)
335			{
336			if (shl_findsym(&tmpptr, "__moddeinit", TYPE_UNDEFINED, (void *)&mod_deinit) == -1)
337			{
338			ilog(L_WARN, "Module %s has no _moddeinit() function", mod_basename);
339			sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no _moddeinit() function",
340			mod_basename);
341			/* this is a soft error. we're allowed not to have one, i guess.
342			* (judging by the code in unload_one_module() */
343			mod_deinit = NULL;
344			}
345			}
346
347			if (shl_findsym(&tmpptr, "_version", TYPE_UNDEFINED, &verp) == -1)
348			{
349			if (shl_findsym(&tmpptr, "__version", TYPE_UNDEFINED, &verp) == -1)
350			ver = unknown_ver;
351			else
352			ver = *verp;
353			}
354			else
355			ver = *verp;
356			#else
357			if ((initfunc = (void(*)(void))dlfunc(tmpptr, "_modinit")) == NULL &&
358			/* Only for compatibility, because some systems have underscore
359			* prepended symbol names */
360			(initfunc = (void(*)(void))dlfunc(tmpptr, "__modinit")) == NULL)
361			{
362			sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no _modinit() function",
363			mod_basename);
364			ilog(L_WARN, "Module %s has no _modinit() function", mod_basename);
365			dlclose(tmpptr);
366			return(-1);
367			}
368
369			mod_deinit = (void(*)(void))dlfunc(tmpptr, "_moddeinit");
370
371			if (mod_deinit == NULL && (mod_deinit = (void(*)(void))dlfunc(tmpptr, "__moddeinit")) == NULL)
372			{
373			sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no _moddeinit() function",
374			mod_basename);
375			ilog(L_WARN, "Module %s has no _moddeinit() function", mod_basename);
376			/* blah blah soft error, see above. */
377			mod_deinit = NULL;
378			}
379
380			verp = (char **)dlsym(tmpptr, "_version");
381
382			if (verp == NULL && (verp = (char **)dlsym(tmpptr, "__version")) == NULL)
383			ver = unknown_ver;
384			else
385			ver = *verp;
386			#endif
387
388	db	164
389	adx	30	modp = MyMalloc(sizeof(struct module));
390	db	165	#ifdef HAVE_DLINFO
391	db	164	dlinfo(tmpptr, RTLD_DI_LINKMAP, &map);
392			if (map != NULL)
393	db	165	addr = map->l_addr;
394	db	164	else
395	db	165	addr = tmpptr;
396	db	164	#endif
397	db	165
398	db	186	modp->handle = tmpptr;
399	db	165	modp->address = addr;
400	adx	30	modp->version = ver;
401			modp->core = core;
402			modp->modremove = mod_deinit;
403
404			DupString(modp->name, mod_basename);
405			dlinkAdd(modp, &modp->node, &mod_list);
406
407			initfunc();
408
409			if (warn == 1)
410			{
411			sendto_realops_flags(UMODE_ALL, L_ALL,
412			"Module %s [version: %s] loaded at %p",
413	db	165	mod_basename, ver, addr);
414	adx	30	ilog(L_WARN, "Module %s [version: %s] loaded at %p",
415	db	165	mod_basename, ver, addr);
416	adx	30	}
417
418			return(0);
419			}