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_modload(struct Client *, struct Client *, int, char *[]);
static void mo_modlist(struct Client *, struct Client *, int, char *[]);
static void mo_modreload(struct Client *, struct Client *, int, char *[]);
static void mo_modunload(struct Client *, struct Client *, int, char *[]);

struct Message modload_msgtab = {
 "MODLOAD", 0, 0, 2, 0, MFLG_SLOW, 0,
  {m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modload, m_ignore}
};

struct Message modunload_msgtab = {
 "MODUNLOAD", 0, 0, 2, 0, MFLG_SLOW, 0,
  {m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modunload, m_ignore}
};

struct Message modreload_msgtab = {
  "MODRELOAD", 0, 0, 2, 0, MFLG_SLOW, 0,
  {m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modreload, m_ignore}
};

struct Message modlist_msgtab = {
 "MODLIST", 0, 0, 0, 0, MFLG_SLOW, 0,
  {m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modlist, 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(&modload_msgtab);
  mod_add_cmd(&modunload_msgtab);
  mod_add_cmd(&modreload_msgtab);
  mod_add_cmd(&modlist_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;
}

/* load a module .. */
static void
mo_modload(struct Client *client_p, struct Client *source_p,
           int parc, char *parv[])
{
  const char *m_bn = NULL;

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

  m_bn = libio_basename(parv[1]);

  if (findmodule_byname(m_bn) != 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[1]);
}

/* unload a module .. */
static void
mo_modunload(struct Client *client_p, struct Client *source_p,
             int parc, char *parv[])
{
  const char *m_bn = NULL;
  struct module *modp = NULL;

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

  m_bn = libio_basename(parv[1]);

  if ((modp = findmodule_byname(m_bn)) == 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);
  }
}

/* unload and load in one! */
static void
mo_modreload(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 (!strcmp(parv[1], "*"))
  {
    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;
  }

  m_bn = libio_basename(parv[1]);

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

/* list modules .. */
static void
mo_modlist(struct Client *client_p, struct Client *source_p,
           int parc, char *parv[])
{
  const dlink_node *ptr = NULL;

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

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

    if (parc > 1 && !match(parv[1], 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);
}
Revision:	1436
Committed:	Sun Jun 17 19:31:28 2012 UTC (13 years, 2 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/src/modules.c*
File size:	14135 byte(s)
Log Message:	- Removed "MODRESTART" command. "MODRELOAD *" will now reload all modules.
#	User	Rev	Content
1	adx	30	/*
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	knight	31	* $Id$
23	adx	30	*/
24
25	michael	1237	#include "ltdl.h"
26
27	adx	30	#include "stdinc.h"
28	michael	1011	#include "list.h"
29	adx	30	#include "modules.h"
30	michael	1309	#include "log.h"
31	adx	30	#include "ircd.h"
32			#include "client.h"
33			#include "send.h"
34	michael	1309	#include "conf.h"
35	adx	30	#include "numeric.h"
36			#include "parse.h"
37			#include "ircd_defs.h"
38			#include "irc_string.h"
39			#include "memory.h"
40
41
42	michael	1238	static dlink_list modules_list = { NULL, NULL, 0 };
43	adx	30
44	michael	1237	static const char *unknown_ver = "<unknown>";
45
46	adx	30	static const char *core_module_table[] =
47			{
48	michael	912	"m_die.la",
49	michael	946	"m_error.la",
50	michael	912	"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	adx	30	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_modload(struct Client , struct Client , int, char *[]);
68			static void mo_modlist(struct Client , struct Client , int, char *[]);
69			static void mo_modreload(struct Client , struct Client , int, char *[]);
70			static void mo_modunload(struct Client , struct Client , int, char *[]);
71
72			struct Message modload_msgtab = {
73			"MODLOAD", 0, 0, 2, 0, MFLG_SLOW, 0,
74			{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modload, m_ignore}
75			};
76
77			struct Message modunload_msgtab = {
78			"MODUNLOAD", 0, 0, 2, 0, MFLG_SLOW, 0,
79			{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modunload, m_ignore}
80			};
81
82			struct Message modreload_msgtab = {
83			"MODRELOAD", 0, 0, 2, 0, MFLG_SLOW, 0,
84			{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modreload, m_ignore}
85			};
86
87			struct Message modlist_msgtab = {
88			"MODLIST", 0, 0, 0, 0, MFLG_SLOW, 0,
89			{m_unregistered, m_not_oper, m_ignore, m_ignore, mo_modlist, m_ignore}
90			};
91
92
93	michael	1237	int
94			modules_valid_suffix(const char *name)
95			{
96			return ((name = strrchr(name, '.'))) && !strcmp(name, ".la");
97			}
98
99			/* unload_one_module()
100			*
101			* inputs - name of module to unload
102			* - 1 to say modules unloaded, 0 to not
103			* output - 0 if successful, -1 if error
104			* side effects - module is unloaded
105			*/
106			int
107			unload_one_module(const char *name, int warn)
108			{
109			struct module *modp = NULL;
110
111			if ((modp = findmodule_byname(name)) == NULL)
112			return -1;
113
114			if (modp->modexit)
115			modp->modexit();
116
117	michael	1238	assert(dlink_list_length(&modules_list) > 0);
118			dlinkDelete(&modp->node, &modules_list);
119	michael	1237	MyFree(modp->name);
120
121			lt_dlclose(modp->handle);
122
123			if (warn == 1)
124			{
125	michael	1247	ilog(LOG_TYPE_IRCD, "Module %s unloaded", name);
126	michael	1237	sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s unloaded", name);
127			}
128
129			return 0;
130			}
131
132			/* load_a_module()
133			*
134			* inputs - path name of module, int to notice, int of core
135			* output - -1 if error 0 if success
136			* side effects - loads a module if successful
137			*/
138			int
139	michael	1404	load_a_module(const char *path, int warn)
140	michael	1237	{
141			lt_dlhandle tmpptr = NULL;
142			const char *mod_basename = NULL;
143			struct module *modp = NULL;
144
145			if (findmodule_byname((mod_basename = libio_basename(path))))
146			return 1;
147
148			if (!(tmpptr = lt_dlopen(path))) {
149			const char *err = ((err = lt_dlerror())) ? err : "<unknown>";
150
151			sendto_realops_flags(UMODE_ALL, L_ALL, "Error loading module %s: %s",
152			mod_basename, err);
153	michael	1247	ilog(LOG_TYPE_IRCD, "Error loading module %s: %s", mod_basename, err);
154	michael	1237	return -1;
155			}
156
157			if ((modp = lt_dlsym(tmpptr, "module_entry")) == NULL)
158			{
159			sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no module_entry export",
160			mod_basename);
161	michael	1247	ilog(LOG_TYPE_IRCD, "Module %s has no module_entry export", mod_basename);
162	michael	1237	lt_dlclose(tmpptr);
163			return -1;
164			}
165
166			modp->handle = tmpptr;
167
168			if (EmptyString(modp->version))
169			modp->version = unknown_ver;
170
171			DupString(modp->name, mod_basename);
172	michael	1238	dlinkAdd(modp, &modp->node, &modules_list);
173	michael	1237
174			if (modp->modinit)
175			modp->modinit();
176
177			if (warn == 1)
178			{
179			sendto_realops_flags(UMODE_ALL, L_ALL,
180			"Module %s [version: %s handle: %p] loaded.",
181			modp->name, modp->version, tmpptr);
182	michael	1247	ilog(LOG_TYPE_IRCD, "Module %s [version: %s handle: %p] loaded.",
183	michael	1237	modp->name, modp->version, tmpptr);
184			}
185
186			return 0;
187			}
188
189	adx	30	/*
190			* modules_init
191			*
192			* input - NONE
193			* output - NONE
194			* side effects - The basic module manipulation modules are loaded
195			*/
196			void
197			modules_init(void)
198			{
199	michael	1237	if (lt_dlinit())
200			{
201	michael	1247	ilog(LOG_TYPE_IRCD, "Couldn't initialize the libltdl run time dynamic"
202	michael	1237	" link library. Exiting.");
203			exit(0);
204			}
205	michael	912
206	adx	30	mod_add_cmd(&modload_msgtab);
207			mod_add_cmd(&modunload_msgtab);
208			mod_add_cmd(&modreload_msgtab);
209			mod_add_cmd(&modlist_msgtab);
210			}
211
212			/* mod_find_path()
213			*
214			* input - path
215			* output - none
216			* side effects - returns a module path from path
217			*/
218			static struct module_path *
219			mod_find_path(const char *path)
220			{
221			dlink_node *ptr;
222
223			DLINK_FOREACH(ptr, mod_paths.head)
224			{
225	michael	1404	struct module_path *mpath = ptr->data;
226	adx	30
227			if (!strcmp(path, mpath->path))
228			return mpath;
229			}
230
231			return NULL;
232			}
233
234			/* mod_add_path()
235			*
236			* input - path
237			* output - NONE
238			* side effects - adds path to list
239			*/
240			void
241			mod_add_path(const char *path)
242			{
243			struct module_path *pathst;
244
245			if (mod_find_path(path))
246			return;
247
248			pathst = MyMalloc(sizeof(struct module_path));
249
250			strlcpy(pathst->path, path, sizeof(pathst->path));
251			dlinkAdd(pathst, &pathst->node, &mod_paths);
252			}
253
254			/* add_conf_module
255			*
256			* input - module name
257			* output - NONE
258			* side effects - adds module to conf_mod
259			*/
260			void
261			add_conf_module(const char *name)
262			{
263			struct module_path *pathst;
264
265			pathst = MyMalloc(sizeof(struct module_path));
266
267			strlcpy(pathst->path, name, sizeof(pathst->path));
268			dlinkAdd(pathst, &pathst->node, &conf_modules);
269			}
270
271			/* mod_clear_paths()
272			*
273			* input - NONE
274			* output - NONE
275			* side effects - clear the lists of paths and conf modules
276			*/
277			void
278			mod_clear_paths(void)
279			{
280	michael	1237	dlink_node ptr = NULL, next_ptr = NULL;
281	adx	30
282			DLINK_FOREACH_SAFE(ptr, next_ptr, mod_paths.head)
283			{
284	michael	1404	dlinkDelete(ptr, &mod_paths);
285			MyFree(ptr->data);
286	adx	30	}
287
288			DLINK_FOREACH_SAFE(ptr, next_ptr, conf_modules.head)
289			{
290	michael	1404	dlinkDelete(ptr, &conf_modules);
291			MyFree(ptr->data);
292	adx	30	}
293			}
294
295			/* findmodule_byname
296			*
297			* input - name of module
298			* output - NULL if not found or pointer to module
299			* side effects - NONE
300			*/
301	michael	1230	struct module *
302	adx	30	findmodule_byname(const char *name)
303			{
304	michael	1230	dlink_node *ptr = NULL;
305	adx	30
306	michael	1238	DLINK_FOREACH(ptr, modules_list.head)
307	adx	30	{
308	michael	1230	struct module *modp = ptr->data;
309	adx	30
310	db	218	if (strcmp(modp->name, name) == 0)
311	michael	1230	return modp;
312	adx	30	}
313
314			return NULL;
315			}
316
317			/* load_all_modules()
318			*
319			* input - int flag warn
320			* output - NONE
321			* side effects - load all modules found in autoload directory
322			*/
323			void
324			load_all_modules(int warn)
325			{
326			DIR *system_module_dir = NULL;
327			struct dirent *ldirent = NULL;
328			char module_fq_name[PATH_MAX + 1];
329
330			if ((system_module_dir = opendir(AUTOMODPATH)) == NULL)
331			{
332	michael	1247	ilog(LOG_TYPE_IRCD, "Could not load modules from %s: %s",
333	adx	30	AUTOMODPATH, strerror(errno));
334			return;
335			}
336
337			while ((ldirent = readdir(system_module_dir)) != NULL)
338			{
339	michael	912	if (modules_valid_suffix(ldirent->d_name))
340	adx	30	{
341			snprintf(module_fq_name, sizeof(module_fq_name), "%s/%s",
342			AUTOMODPATH, ldirent->d_name);
343	michael	1404	load_a_module(module_fq_name, warn);
344	adx	30	}
345			}
346
347			closedir(system_module_dir);
348			}
349
350			/* load_conf_modules()
351			*
352			* input - NONE
353			* output - NONE
354			* side effects - load modules given in ircd.conf
355			*/
356			void
357			load_conf_modules(void)
358			{
359			dlink_node *ptr = NULL;
360
361			DLINK_FOREACH(ptr, conf_modules.head)
362			{
363	michael	1404	struct module_path *mpath = ptr->data;
364	adx	30
365			if (findmodule_byname(mpath->path) == NULL)
366	michael	1404	load_one_module(mpath->path);
367	adx	30	}
368			}
369
370			/* load_core_modules()
371			*
372			* input - int flag warn
373			* output - NONE
374			* side effects - core modules are loaded, if any fail, kill ircd
375			*/
376			void
377			load_core_modules(int warn)
378			{
379			char module_name[PATH_MAX + 1];
380			int i = 0;
381
382			for (; core_module_table[i]; ++i)
383			{
384	michael	912	snprintf(module_name, sizeof(module_name), "%s%s",
385			MODPATH, core_module_table[i]);
386	adx	30
387	michael	1404	if (load_a_module(module_name, warn) == -1)
388	adx	30	{
389	michael	1247	ilog(LOG_TYPE_IRCD, "Error loading core module %s: terminating ircd",
390	michael	912	core_module_table[i]);
391	adx	30	exit(EXIT_FAILURE);
392			}
393			}
394			}
395
396			/* load_one_module()
397			*
398			* input - pointer to path
399			* - flagged as core module or not
400			* output - -1 if error
401			* side effects - module is loaded if found.
402			*/
403			int
404	michael	1404	load_one_module(const char *path)
405	adx	30	{
406			dlink_node *ptr = NULL;
407			char modpath[PATH_MAX + 1];
408			struct stat statbuf;
409
410			DLINK_FOREACH(ptr, mod_paths.head)
411			{
412			const struct module_path *mpath = ptr->data;
413
414			snprintf(modpath, sizeof(modpath), "%s/%s", mpath->path, path);
415
416	michael	912	if (!modules_valid_suffix(path))
417			continue;
418
419	adx	30	if (strstr(modpath, "../") == NULL &&
420			strstr(modpath, "/..") == NULL)
421			if (!stat(modpath, &statbuf))
422	michael	1404	if (S_ISREG(statbuf.st_mode)) /* Regular files only please */
423			return load_a_module(modpath, 1);
424	adx	30	}
425
426			sendto_realops_flags(UMODE_ALL, L_ALL,
427			"Cannot locate module %s", path);
428	michael	1247	ilog(LOG_TYPE_IRCD, "Cannot locate module %s", path);
429	adx	30	return -1;
430			}
431
432			/* load a module .. */
433			static void
434			mo_modload(struct Client client_p, struct Client source_p,
435			int parc, char *parv[])
436			{
437	michael	978	const char *m_bn = NULL;
438	adx	30
439	michael	1228	if (!HasOFlag(source_p, OPER_FLAG_MODULE))
440	adx	30	{
441			sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
442			me.name, source_p->name);
443			return;
444			}
445
446	michael	978	m_bn = libio_basename(parv[1]);
447	adx	30
448			if (findmodule_byname(m_bn) != 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	michael	1404	load_one_module(parv[1]);
456	adx	30	}
457
458			/* unload a module .. */
459			static void
460			mo_modunload(struct Client client_p, struct Client source_p,
461			int parc, char *parv[])
462			{
463	michael	978	const char *m_bn = NULL;
464	michael	1230	struct module *modp = NULL;
465	adx	30
466	michael	1228	if (!HasOFlag(source_p, OPER_FLAG_MODULE))
467	adx	30	{
468			sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
469			me.name, source_p->name);
470			return;
471			}
472
473	michael	978	m_bn = libio_basename(parv[1]);
474	adx	30
475	michael	1230	if ((modp = findmodule_byname(m_bn)) == NULL)
476	adx	30	{
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	michael	1230	if (modp->flags & MODULE_FLAG_CORE)
483	adx	30	{
484			sendto_one(source_p,
485			":%s NOTICE %s :Module %s is a core module and may not be unloaded",
486			me.name, source_p->name, m_bn);
487			return;
488			}
489
490			if (unload_one_module(m_bn, 1) == -1)
491			{
492			sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
493			me.name, source_p->name, m_bn);
494			}
495			}
496
497			/* unload and load in one! */
498			static void
499			mo_modreload(struct Client client_p, struct Client source_p,
500			int parc, char *parv[])
501			{
502	michael	978	const char *m_bn = NULL;
503	michael	1230	struct module *modp = NULL;
504	adx	30	int check_core;
505
506	michael	1228	if (!HasOFlag(source_p, OPER_FLAG_MODULE))
507	adx	30	{
508			sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
509			me.name, source_p->name);
510			return;
511			}
512
513	michael	1436	if (!strcmp(parv[1], "*"))
514			{
515			unsigned int modnum = 0;
516			dlink_node ptr = NULL, ptr_next = NULL;
517
518			sendto_one(source_p, ":%s NOTICE %s :Reloading all modules",
519			me.name, source_p->name);
520
521			modnum = dlink_list_length(&modules_list);
522
523			DLINK_FOREACH_SAFE(ptr, ptr_next, modules_list.head)
524			{
525			modp = ptr->data;
526			unload_one_module(modp->name, 0);
527			}
528
529			load_all_modules(0);
530			load_conf_modules();
531			load_core_modules(0);
532
533			sendto_realops_flags(UMODE_ALL, L_ALL,
534			"Module Restart: %u modules unloaded, %u modules loaded",
535			modnum, dlink_list_length(&modules_list));
536			ilog(LOG_TYPE_IRCD, "Module Restart: %u modules unloaded, %u modules loaded",
537			modnum, dlink_list_length(&modules_list));
538			return;
539			}
540
541	michael	978	m_bn = libio_basename(parv[1]);
542	adx	30
543	michael	1230	if ((modp = findmodule_byname(m_bn)) == NULL)
544	adx	30	{
545			sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
546			me.name, source_p->name, m_bn);
547			return;
548			}
549
550	michael	1230	check_core = (modp->flags & MODULE_FLAG_CORE) != 0;
551	adx	30
552			if (unload_one_module(m_bn, 1) == -1)
553			{
554			sendto_one(source_p, ":%s NOTICE %s :Module %s is not loaded",
555			me.name, source_p->name, m_bn);
556			return;
557			}
558
559	michael	1404	if ((load_one_module(parv[1]) == -1) && check_core)
560	adx	30	{
561			sendto_realops_flags(UMODE_ALL, L_ALL, "Error reloading core "
562			"module: %s: terminating ircd", parv[1]);
563	michael	1247	ilog(LOG_TYPE_IRCD, "Error loading core module %s: terminating ircd", parv[1]);
564	adx	30	exit(0);
565			}
566			}
567
568			/* list modules .. */
569			static void
570			mo_modlist(struct Client client_p, struct Client source_p,
571			int parc, char *parv[])
572			{
573	michael	912	const dlink_node *ptr = NULL;
574	adx	30
575	michael	1228	if (!HasOFlag(source_p, OPER_FLAG_MODULE))
576	adx	30	{
577			sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
578			me.name, source_p->name);
579			return;
580			}
581
582	michael	1238	DLINK_FOREACH(ptr, modules_list.head)
583	adx	30	{
584	michael	912	const struct module *modp = ptr->data;
585	adx	30
586	michael	912	if (parc > 1 && !match(parv[1], modp->name))
587			continue;
588
589	michael	1234	sendto_one(source_p, form_str(RPL_MODLIST), me.name, source_p->name,
590	michael	912	modp->name, modp->handle,
591	michael	1230	modp->version, (modp->flags & MODULE_FLAG_CORE) ?"(core)":"");
592	adx	30	}
593
594			sendto_one(source_p, form_str(RPL_ENDOFMODLIST),
595			me.name, source_p->name);
596			}