trunk/src/modules.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  modules.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 "ltdl.h"

#include "stdinc.h"
#include "list.h"
#include "modules.h"
#include "log.h"
#include "ircd.h"
#include "client.h"
#include "send.h"
#include "conf.h"
#include "numeric.h"
#include "parse.h"
#include "ircd_defs.h"
#include "irc_string.h"
#include "memory.h"


static dlink_list modules_list = { NULL, NULL, 0 };

static const char *unknown_ver = "<unknown>";

static const char *core_module_table[] =
{
  "m_die.la",
  "m_error.la",
  "m_join.la",
  "m_kick.la",
  "m_kill.la",
  "m_message.la",
  "m_mode.la",
  "m_nick.la",
  "m_part.la",
  "m_quit.la",
  "m_server.la",
  "m_sjoin.la",
  "m_squit.la",
  NULL
};

static dlink_list mod_paths = { NULL, NULL, 0 };
static dlink_list conf_modules = { NULL, NULL, 0 };

static void mo_module(struct Client *, struct Client *, int, char *[]);

struct Message module_msgtab = {
 "MODULE", 0, 0, 2, 0, MFLG_SLOW, 0,
  {m_unregistered, m_not_oper, m_ignore, m_ignore, mo_module, m_ignore}
};

int
modules_valid_suffix(const char *name)
{
  return ((name = strrchr(name, '.'))) && !strcmp(name, ".la");
}

/* 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(const char *name, int warn)
{
  struct module *modp = NULL;

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

  if (modp->modexit)
   modp->modexit();

  assert(dlink_list_length(&modules_list) > 0);
  dlinkDelete(&modp->node, &modules_list);
  MyFree(modp->name);

  lt_dlclose(modp->handle);

  if (warn == 1)
  {
    ilog(LOG_TYPE_IRCD, "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(const char *path, int warn)
{
  lt_dlhandle tmpptr = NULL;
  const char *mod_basename = NULL;
  struct module *modp = NULL;

  if (findmodule_byname((mod_basename = libio_basename(path))))
    return 1;

  if (!(tmpptr = lt_dlopen(path))) {
    const char *err = ((err = lt_dlerror())) ? err : "<unknown>";

    sendto_realops_flags(UMODE_ALL, L_ALL, "Error loading module %s: %s",
                         mod_basename, err);
    ilog(LOG_TYPE_IRCD, "Error loading module %s: %s", mod_basename, err);
    return -1;
  }

  if ((modp = lt_dlsym(tmpptr, "module_entry")) == NULL)
  {
    sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no module_entry export",
                         mod_basename);
    ilog(LOG_TYPE_IRCD, "Module %s has no module_entry export", mod_basename);
    lt_dlclose(tmpptr);
    return -1;
  }

  modp->handle = tmpptr;

  if (EmptyString(modp->version))
    modp->version = unknown_ver;

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

  if (modp->modinit)
    modp->modinit();

  if (warn == 1)
  {
    sendto_realops_flags(UMODE_ALL, L_ALL,
                         "Module %s [version: %s handle: %p] loaded.",
                         modp->name, modp->version, tmpptr);
    ilog(LOG_TYPE_IRCD, "Module %s [version: %s handle: %p] loaded.",
         modp->name, modp->version, tmpptr);
  }

  return 0;
}

/*
 * modules_init
 *
 * input        - NONE
 * output       - NONE
 * side effects - The basic module manipulation modules are loaded
 */
void
modules_init(void)
{
  if (lt_dlinit())
  {
    ilog(LOG_TYPE_IRCD, "Couldn't initialize the libltdl run time dynamic"
         " link library. Exiting.");
    exit(0);
  }

  mod_add_cmd(&module_msgtab);
}

/* mod_find_path()
 *
 * input        - path
 * output       - none
 * side effects - returns a module path from path
 */
static struct module_path *
mod_find_path(const char *path)
{
  dlink_node *ptr;

  DLINK_FOREACH(ptr, mod_paths.head)
  {
    struct module_path *mpath = ptr->data;

    if (!strcmp(path, mpath->path))
      return mpath;
  }

  return NULL;
}

/* mod_add_path()
 *
 * input        - path
 * output       - NONE
 * side effects - adds path to list
 */
void
mod_add_path(const char *path)
{
  struct module_path *pathst;

  if (mod_find_path(path))
    return;

  pathst = MyMalloc(sizeof(struct module_path));

  strlcpy(pathst->path, path, sizeof(pathst->path));
  dlinkAdd(pathst, &pathst->node, &mod_paths);
}

/* add_conf_module
 *
 * input        - module name
 * output       - NONE
 * side effects - adds module to conf_mod
 */
void
add_conf_module(const char *name)
{
  struct module_path *pathst;

  pathst = MyMalloc(sizeof(struct module_path));

  strlcpy(pathst->path, name, sizeof(pathst->path));
  dlinkAdd(pathst, &pathst->node, &conf_modules);
}

/* mod_clear_paths()
 *
 * input        - NONE
 * output       - NONE
 * side effects - clear the lists of paths and conf modules
 */
void
mod_clear_paths(void)
{
  dlink_node *ptr = NULL, *next_ptr = NULL;

  DLINK_FOREACH_SAFE(ptr, next_ptr, mod_paths.head)
  {
    dlinkDelete(ptr, &mod_paths);
    MyFree(ptr->data);
  }

  DLINK_FOREACH_SAFE(ptr, next_ptr, conf_modules.head)
  {
    dlinkDelete(ptr, &conf_modules);
    MyFree(ptr->data);
  }
}

/* findmodule_byname
 *
 * input        - name of module
 * output       - NULL if not found or pointer to module
 * side effects - NONE
 */
struct module *
findmodule_byname(const char *name)
{
  dlink_node *ptr = NULL;

  DLINK_FOREACH(ptr, modules_list.head)
  {
    struct module *modp = ptr->data;

    if (strcmp(modp->name, name) == 0)
      return modp;
  }

  return NULL;
}

/* load_all_modules()
 *
 * input        - int flag warn
 * output       - NONE
 * side effects - load all modules found in autoload directory
 */
void
load_all_modules(int warn)
{
  DIR *system_module_dir = NULL;
  struct dirent *ldirent = NULL;
  char module_fq_name[PATH_MAX + 1];

  if ((system_module_dir = opendir(AUTOMODPATH)) == NULL)
  {
    ilog(LOG_TYPE_IRCD, "Could not load modules from %s: %s",
         AUTOMODPATH, strerror(errno));
    return;
  }

  while ((ldirent = readdir(system_module_dir)) != NULL)
  {
    if (modules_valid_suffix(ldirent->d_name))
    {
       snprintf(module_fq_name, sizeof(module_fq_name), "%s/%s",
                AUTOMODPATH, ldirent->d_name);
       load_a_module(module_fq_name, warn);
    }
  }

  closedir(system_module_dir);
}

/* load_conf_modules()
 *
 * input        - NONE
 * output       - NONE
 * side effects - load modules given in ircd.conf
 */
void
load_conf_modules(void)
{
  dlink_node *ptr = NULL;

  DLINK_FOREACH(ptr, conf_modules.head)
  {
    struct module_path *mpath = ptr->data;

    if (findmodule_byname(mpath->path) == NULL)
      load_one_module(mpath->path);
  }
}

/* load_core_modules()
 *
 * input        - int flag warn
 * output       - NONE
 * side effects - core modules are loaded, if any fail, kill ircd
 */
void
load_core_modules(int warn)
{
  char module_name[PATH_MAX + 1];
  int i = 0;

  for (; core_module_table[i]; ++i)
  {
    snprintf(module_name, sizeof(module_name), "%s%s",
             MODPATH, core_module_table[i]);

    if (load_a_module(module_name, warn) == -1)
    {
      ilog(LOG_TYPE_IRCD, "Error loading core module %s: terminating ircd",
           core_module_table[i]);
      exit(EXIT_FAILURE);
    }
  }
}

/* load_one_module()
 *
 * input        - pointer to path
 *              - flagged as core module or not
 * output       - -1 if error 
 * side effects - module is loaded if found.
 */
int
load_one_module(const char *path)
{
  dlink_node *ptr = NULL;
  char modpath[PATH_MAX + 1];
  struct stat statbuf;

  DLINK_FOREACH(ptr, mod_paths.head)
  {
    const struct module_path *mpath = ptr->data;

    snprintf(modpath, sizeof(modpath), "%s/%s", mpath->path, path);

    if (!modules_valid_suffix(path))
      continue;

    if (strstr(modpath, "../") == NULL &&
        strstr(modpath, "/..") == NULL) 
      if (!stat(modpath, &statbuf))
        if (S_ISREG(statbuf.st_mode))  /* Regular files only please */
          return load_a_module(modpath, 1);
  }

  sendto_realops_flags(UMODE_ALL, L_ALL,
                       "Cannot locate module %s", path);
  ilog(LOG_TYPE_IRCD, "Cannot locate module %s", path);
  return -1;
}

/*! \brief MODULE command handler (called by operators)
 *
 * \param client_p Pointer to allocated Client struct with physical connection
 *                 to this server, i.e. with an open socket connected.
 * \param source_p Pointer to allocated Client struct from which the message
 *                 originally comes from.  This can be a local or remote client.
 * \param parc     Integer holding the number of supplied arguments.
 * \param parv     Argument vector where parv[0] .. parv[parc-1] are non-NULL
 *                 pointers.
 * \note Valid arguments for this command are:
 *      - parv[0] = sender prefix
 *      - parv[1] = action [LOAD, UNLOAD, RELOAD, LIST]
 *      - parv[2] = module name
 */
static void
mo_module(struct Client *client_p, struct Client *source_p,
          int parc, char *parv[])
{
  const char *m_bn = NULL;
  struct module *modp = NULL;
  int check_core;

  if (!HasOFlag(source_p, OPER_FLAG_MODULE))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
               me.name, source_p->name);
    return;
  }

  if (EmptyString(parv[1]))
  {
    sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
               me.name, source_p->name, "MODULE");
    return;
  }

  if (!irccmp(parv[1], "LOAD"))
  {
    if (findmodule_byname((m_bn = libio_basename(parv[2]))) != NULL)
    {
      sendto_one(source_p, ":%s NOTICE %s :Module %s is already loaded",
                 me.name, source_p->name, m_bn);
      return;
    }

    load_one_module(parv[2]);
    return;
  }

  if (!irccmp(parv[1], "UNLOAD"))
  {
    if ((modp = findmodule_byname((m_bn = libio_basename(parv[2])))) == NULL)
    {
      sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
                 me.name, source_p->name, m_bn);
      return;
    }

    if (modp->flags & MODULE_FLAG_CORE)
    {
      sendto_one(source_p,
                 ":%s NOTICE %s :Module %s is a core module and may not be unloaded",
                 me.name, source_p->name, m_bn);
      return;
    }

    if (unload_one_module(m_bn, 1) == -1)
      sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
                 me.name, source_p->name, m_bn);
    return;
  }

  if (!irccmp(parv[1], "RELOAD"))
  {
    if (!strcmp(parv[2], "*"))
    {
      unsigned int modnum = 0;
      dlink_node *ptr = NULL, *ptr_next = NULL;

      sendto_one(source_p, ":%s NOTICE %s :Reloading all modules",
                 me.name, source_p->name);

      modnum = dlink_list_length(&modules_list);

      DLINK_FOREACH_SAFE(ptr, ptr_next, modules_list.head)
      {
        modp = ptr->data;
        unload_one_module(modp->name, 0);
      }

      load_all_modules(0);
      load_conf_modules();
      load_core_modules(0);

      sendto_realops_flags(UMODE_ALL, L_ALL,
                           "Module Restart: %u modules unloaded, %u modules loaded",
                           modnum, dlink_list_length(&modules_list));
      ilog(LOG_TYPE_IRCD, "Module Restart: %u modules unloaded, %u modules loaded",
           modnum, dlink_list_length(&modules_list));
      return;
    }

    if ((modp = findmodule_byname((m_bn = libio_basename(parv[2])))) == NULL)
    {
      sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
               me.name, source_p->name, m_bn);
      return;
    }

    check_core = (modp->flags & MODULE_FLAG_CORE) != 0;

    if (unload_one_module(m_bn, 1) == -1)
    {
      sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
                 me.name, source_p->name, m_bn);
      return;
    }

    if ((load_one_module(parv[2]) == -1) && check_core)
    {
      sendto_realops_flags(UMODE_ALL, L_ALL, "Error reloading core "
                           "module: %s: terminating ircd", parv[2]);
      ilog(LOG_TYPE_IRCD, "Error loading core module %s: terminating ircd", parv[2]);
      exit(0);
    }

    return;
  }

  if (!irccmp(parv[1], "LIST"))
  {
    const dlink_node *ptr = NULL;

    DLINK_FOREACH(ptr, modules_list.head)
    {
      if (parc > 2 && !match(parv[2], modp->name))
        continue;

      sendto_one(source_p, form_str(RPL_MODLIST), me.name, source_p->name,
                 modp->name, modp->handle,
                 modp->version, (modp->flags & MODULE_FLAG_CORE) ?"(core)":"");
    }

    sendto_one(source_p, form_str(RPL_ENDOFMODLIST),
               me.name, source_p->name);
    return;
  }
}
Revision:	1437
Committed:	Mon Jun 18 19:02:48 2012 UTC (14 years, 1 month ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/src/modules.c*
File size:	13509 byte(s)
Log Message:	- Removed MODLOAD, MODRELOAD, MODUNLOAD and MODLIST command handlers. They all have been replaced by the new "MODULE" command which now deals with the LOAD/UNLOAD/RELOAD/LIST parameters.
#	Content
1	/*
2	* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3	* modules.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	* $Id$
23	*/
24
25	#include "ltdl.h"
26
27	#include "stdinc.h"
28	#include "list.h"
29	#include "modules.h"
30	#include "log.h"
31	#include "ircd.h"
32	#include "client.h"
33	#include "send.h"
34	#include "conf.h"
35	#include "numeric.h"
36	#include "parse.h"
37	#include "ircd_defs.h"
38	#include "irc_string.h"
39	#include "memory.h"
40
41
42	static dlink_list modules_list = { NULL, NULL, 0 };
43
44	static const char *unknown_ver = "<unknown>";
45
46	static const char *core_module_table[] =
47	{
48	"m_die.la",
49	"m_error.la",
50	"m_join.la",
51	"m_kick.la",
52	"m_kill.la",
53	"m_message.la",
54	"m_mode.la",
55	"m_nick.la",
56	"m_part.la",
57	"m_quit.la",
58	"m_server.la",
59	"m_sjoin.la",
60	"m_squit.la",
61	NULL
62	};
63
64	static dlink_list mod_paths = { NULL, NULL, 0 };
65	static dlink_list conf_modules = { NULL, NULL, 0 };
66
67	static void mo_module(struct Client , struct Client , int, char *[]);
68
69	struct Message module_msgtab = {
70	"MODULE", 0, 0, 2, 0, MFLG_SLOW, 0,
71	{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_module, m_ignore}
72	};
73
74	int
75	modules_valid_suffix(const char *name)
76	{
77	return ((name = strrchr(name, '.'))) && !strcmp(name, ".la");
78	}
79
80	/* unload_one_module()
81	*
82	* inputs - name of module to unload
83	* - 1 to say modules unloaded, 0 to not
84	* output - 0 if successful, -1 if error
85	* side effects - module is unloaded
86	*/
87	int
88	unload_one_module(const char *name, int warn)
89	{
90	struct module *modp = NULL;
91
92	if ((modp = findmodule_byname(name)) == NULL)
93	return -1;
94
95	if (modp->modexit)
96	modp->modexit();
97
98	assert(dlink_list_length(&modules_list) > 0);
99	dlinkDelete(&modp->node, &modules_list);
100	MyFree(modp->name);
101
102	lt_dlclose(modp->handle);
103
104	if (warn == 1)
105	{
106	ilog(LOG_TYPE_IRCD, "Module %s unloaded", name);
107	sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s unloaded", name);
108	}
109
110	return 0;
111	}
112
113	/* load_a_module()
114	*
115	* inputs - path name of module, int to notice, int of core
116	* output - -1 if error 0 if success
117	* side effects - loads a module if successful
118	*/
119	int
120	load_a_module(const char *path, int warn)
121	{
122	lt_dlhandle tmpptr = NULL;
123	const char *mod_basename = NULL;
124	struct module *modp = NULL;
125
126	if (findmodule_byname((mod_basename = libio_basename(path))))
127	return 1;
128
129	if (!(tmpptr = lt_dlopen(path))) {
130	const char *err = ((err = lt_dlerror())) ? err : "<unknown>";
131
132	sendto_realops_flags(UMODE_ALL, L_ALL, "Error loading module %s: %s",
133	mod_basename, err);
134	ilog(LOG_TYPE_IRCD, "Error loading module %s: %s", mod_basename, err);
135	return -1;
136	}
137
138	if ((modp = lt_dlsym(tmpptr, "module_entry")) == NULL)
139	{
140	sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no module_entry export",
141	mod_basename);
142	ilog(LOG_TYPE_IRCD, "Module %s has no module_entry export", mod_basename);
143	lt_dlclose(tmpptr);
144	return -1;
145	}
146
147	modp->handle = tmpptr;
148
149	if (EmptyString(modp->version))
150	modp->version = unknown_ver;
151
152	DupString(modp->name, mod_basename);
153	dlinkAdd(modp, &modp->node, &modules_list);
154
155	if (modp->modinit)
156	modp->modinit();
157
158	if (warn == 1)
159	{
160	sendto_realops_flags(UMODE_ALL, L_ALL,
161	"Module %s [version: %s handle: %p] loaded.",
162	modp->name, modp->version, tmpptr);
163	ilog(LOG_TYPE_IRCD, "Module %s [version: %s handle: %p] loaded.",
164	modp->name, modp->version, tmpptr);
165	}
166
167	return 0;
168	}
169
170	/*
171	* modules_init
172	*
173	* input - NONE
174	* output - NONE
175	* side effects - The basic module manipulation modules are loaded
176	*/
177	void
178	modules_init(void)
179	{
180	if (lt_dlinit())
181	{
182	ilog(LOG_TYPE_IRCD, "Couldn't initialize the libltdl run time dynamic"
183	" link library. Exiting.");
184	exit(0);
185	}
186
187	mod_add_cmd(&module_msgtab);
188	}
189
190	/* mod_find_path()
191	*
192	* input - path
193	* output - none
194	* side effects - returns a module path from path
195	*/
196	static struct module_path *
197	mod_find_path(const char *path)
198	{
199	dlink_node *ptr;
200
201	DLINK_FOREACH(ptr, mod_paths.head)
202	{
203	struct module_path *mpath = ptr->data;
204
205	if (!strcmp(path, mpath->path))
206	return mpath;
207	}
208
209	return NULL;
210	}
211
212	/* mod_add_path()
213	*
214	* input - path
215	* output - NONE
216	* side effects - adds path to list
217	*/
218	void
219	mod_add_path(const char *path)
220	{
221	struct module_path *pathst;
222
223	if (mod_find_path(path))
224	return;
225
226	pathst = MyMalloc(sizeof(struct module_path));
227
228	strlcpy(pathst->path, path, sizeof(pathst->path));
229	dlinkAdd(pathst, &pathst->node, &mod_paths);
230	}
231
232	/* add_conf_module
233	*
234	* input - module name
235	* output - NONE
236	* side effects - adds module to conf_mod
237	*/
238	void
239	add_conf_module(const char *name)
240	{
241	struct module_path *pathst;
242
243	pathst = MyMalloc(sizeof(struct module_path));
244
245	strlcpy(pathst->path, name, sizeof(pathst->path));
246	dlinkAdd(pathst, &pathst->node, &conf_modules);
247	}
248
249	/* mod_clear_paths()
250	*
251	* input - NONE
252	* output - NONE
253	* side effects - clear the lists of paths and conf modules
254	*/
255	void
256	mod_clear_paths(void)
257	{
258	dlink_node ptr = NULL, next_ptr = NULL;
259
260	DLINK_FOREACH_SAFE(ptr, next_ptr, mod_paths.head)
261	{
262	dlinkDelete(ptr, &mod_paths);
263	MyFree(ptr->data);
264	}
265
266	DLINK_FOREACH_SAFE(ptr, next_ptr, conf_modules.head)
267	{
268	dlinkDelete(ptr, &conf_modules);
269	MyFree(ptr->data);
270	}
271	}
272
273	/* findmodule_byname
274	*
275	* input - name of module
276	* output - NULL if not found or pointer to module
277	* side effects - NONE
278	*/
279	struct module *
280	findmodule_byname(const char *name)
281	{
282	dlink_node *ptr = NULL;
283
284	DLINK_FOREACH(ptr, modules_list.head)
285	{
286	struct module *modp = ptr->data;
287
288	if (strcmp(modp->name, name) == 0)
289	return modp;
290	}
291
292	return NULL;
293	}
294
295	/* load_all_modules()
296	*
297	* input - int flag warn
298	* output - NONE
299	* side effects - load all modules found in autoload directory
300	*/
301	void
302	load_all_modules(int warn)
303	{
304	DIR *system_module_dir = NULL;
305	struct dirent *ldirent = NULL;
306	char module_fq_name[PATH_MAX + 1];
307
308	if ((system_module_dir = opendir(AUTOMODPATH)) == NULL)
309	{
310	ilog(LOG_TYPE_IRCD, "Could not load modules from %s: %s",
311	AUTOMODPATH, strerror(errno));
312	return;
313	}
314
315	while ((ldirent = readdir(system_module_dir)) != NULL)
316	{
317	if (modules_valid_suffix(ldirent->d_name))
318	{
319	snprintf(module_fq_name, sizeof(module_fq_name), "%s/%s",
320	AUTOMODPATH, ldirent->d_name);
321	load_a_module(module_fq_name, warn);
322	}
323	}
324
325	closedir(system_module_dir);
326	}
327
328	/* load_conf_modules()
329	*
330	* input - NONE
331	* output - NONE
332	* side effects - load modules given in ircd.conf
333	*/
334	void
335	load_conf_modules(void)
336	{
337	dlink_node *ptr = NULL;
338
339	DLINK_FOREACH(ptr, conf_modules.head)
340	{
341	struct module_path *mpath = ptr->data;
342
343	if (findmodule_byname(mpath->path) == NULL)
344	load_one_module(mpath->path);
345	}
346	}
347
348	/* load_core_modules()
349	*
350	* input - int flag warn
351	* output - NONE
352	* side effects - core modules are loaded, if any fail, kill ircd
353	*/
354	void
355	load_core_modules(int warn)
356	{
357	char module_name[PATH_MAX + 1];
358	int i = 0;
359
360	for (; core_module_table[i]; ++i)
361	{
362	snprintf(module_name, sizeof(module_name), "%s%s",
363	MODPATH, core_module_table[i]);
364
365	if (load_a_module(module_name, warn) == -1)
366	{
367	ilog(LOG_TYPE_IRCD, "Error loading core module %s: terminating ircd",
368	core_module_table[i]);
369	exit(EXIT_FAILURE);
370	}
371	}
372	}
373
374	/* load_one_module()
375	*
376	* input - pointer to path
377	* - flagged as core module or not
378	* output - -1 if error
379	* side effects - module is loaded if found.
380	*/
381	int
382	load_one_module(const char *path)
383	{
384	dlink_node *ptr = NULL;
385	char modpath[PATH_MAX + 1];
386	struct stat statbuf;
387
388	DLINK_FOREACH(ptr, mod_paths.head)
389	{
390	const struct module_path *mpath = ptr->data;
391
392	snprintf(modpath, sizeof(modpath), "%s/%s", mpath->path, path);
393
394	if (!modules_valid_suffix(path))
395	continue;
396
397	if (strstr(modpath, "../") == NULL &&
398	strstr(modpath, "/..") == NULL)
399	if (!stat(modpath, &statbuf))
400	if (S_ISREG(statbuf.st_mode)) /* Regular files only please */
401	return load_a_module(modpath, 1);
402	}
403
404	sendto_realops_flags(UMODE_ALL, L_ALL,
405	"Cannot locate module %s", path);
406	ilog(LOG_TYPE_IRCD, "Cannot locate module %s", path);
407	return -1;
408	}
409
410	/*! \brief MODULE command handler (called by operators)
411	*
412	* \param client_p Pointer to allocated Client struct with physical connection
413	* to this server, i.e. with an open socket connected.
414	* \param source_p Pointer to allocated Client struct from which the message
415	* originally comes from. This can be a local or remote client.
416	* \param parc Integer holding the number of supplied arguments.
417	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
418	* pointers.
419	* \note Valid arguments for this command are:
420	* - parv[0] = sender prefix
421	* - parv[1] = action [LOAD, UNLOAD, RELOAD, LIST]
422	* - parv[2] = module name
423	*/
424	static void
425	mo_module(struct Client client_p, struct Client source_p,
426	int parc, char *parv[])
427	{
428	const char *m_bn = NULL;
429	struct module *modp = NULL;
430	int check_core;
431
432	if (!HasOFlag(source_p, OPER_FLAG_MODULE))
433	{
434	sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
435	me.name, source_p->name);
436	return;
437	}
438
439	if (EmptyString(parv[1]))
440	{
441	sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
442	me.name, source_p->name, "MODULE");
443	return;
444	}
445
446	if (!irccmp(parv[1], "LOAD"))
447	{
448	if (findmodule_byname((m_bn = libio_basename(parv[2]))) != NULL)
449	{
450	sendto_one(source_p, ":%s NOTICE %s :Module %s is already loaded",
451	me.name, source_p->name, m_bn);
452	return;
453	}
454
455	load_one_module(parv[2]);
456	return;
457	}
458
459	if (!irccmp(parv[1], "UNLOAD"))
460	{
461	if ((modp = findmodule_byname((m_bn = libio_basename(parv[2])))) == NULL)
462	{
463	sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
464	me.name, source_p->name, m_bn);
465	return;
466	}
467
468	if (modp->flags & MODULE_FLAG_CORE)
469	{
470	sendto_one(source_p,
471	":%s NOTICE %s :Module %s is a core module and may not be unloaded",
472	me.name, source_p->name, m_bn);
473	return;
474	}
475
476	if (unload_one_module(m_bn, 1) == -1)
477	sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
478	me.name, source_p->name, m_bn);
479	return;
480	}
481
482	if (!irccmp(parv[1], "RELOAD"))
483	{
484	if (!strcmp(parv[2], "*"))
485	{
486	unsigned int modnum = 0;
487	dlink_node ptr = NULL, ptr_next = NULL;
488
489	sendto_one(source_p, ":%s NOTICE %s :Reloading all modules",
490	me.name, source_p->name);
491
492	modnum = dlink_list_length(&modules_list);
493
494	DLINK_FOREACH_SAFE(ptr, ptr_next, modules_list.head)
495	{
496	modp = ptr->data;
497	unload_one_module(modp->name, 0);
498	}
499
500	load_all_modules(0);
501	load_conf_modules();
502	load_core_modules(0);
503
504	sendto_realops_flags(UMODE_ALL, L_ALL,
505	"Module Restart: %u modules unloaded, %u modules loaded",
506	modnum, dlink_list_length(&modules_list));
507	ilog(LOG_TYPE_IRCD, "Module Restart: %u modules unloaded, %u modules loaded",
508	modnum, dlink_list_length(&modules_list));
509	return;
510	}
511
512	if ((modp = findmodule_byname((m_bn = libio_basename(parv[2])))) == NULL)
513	{
514	sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
515	me.name, source_p->name, m_bn);
516	return;
517	}
518
519	check_core = (modp->flags & MODULE_FLAG_CORE) != 0;
520
521	if (unload_one_module(m_bn, 1) == -1)
522	{
523	sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
524	me.name, source_p->name, m_bn);
525	return;
526	}
527
528	if ((load_one_module(parv[2]) == -1) && check_core)
529	{
530	sendto_realops_flags(UMODE_ALL, L_ALL, "Error reloading core "
531	"module: %s: terminating ircd", parv[2]);
532	ilog(LOG_TYPE_IRCD, "Error loading core module %s: terminating ircd", parv[2]);
533	exit(0);
534	}
535
536	return;
537	}
538
539	if (!irccmp(parv[1], "LIST"))
540	{
541	const dlink_node *ptr = NULL;
542
543	DLINK_FOREACH(ptr, modules_list.head)
544	{
545	if (parc > 2 && !match(parv[2], modp->name))
546	continue;
547
548	sendto_one(source_p, form_str(RPL_MODLIST), me.name, source_p->name,
549	modp->name, modp->handle,
550	modp->version, (modp->flags & MODULE_FLAG_CORE) ?"(core)":"");
551	}
552
553	sendto_one(source_p, form_str(RPL_ENDOFMODLIST),
554	me.name, source_p->name);
555	return;
556	}
557	}