trunk/modules/m_help.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_help.c: Provides help information to a user/operator.
 *
 *  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 "client.h"
#include "ircd.h"
#include "numeric.h"
#include "send.h"
#include "conf.h"
#include "parse.h"
#include "modules.h"
#include "irc_string.h"

#define HELPLEN 400


static void
sendhelpfile(struct Client *source_p, const char *path, const char *topic)
{
  FILE *file = NULL;
  char line[HELPLEN] = { '\0' };

  if ((file = fopen(path, "r")) == NULL)
  {
    sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
               me.name, source_p->name, topic);
    return;
  }

  if (fgets(line, sizeof(line), file) == NULL)
  {
    sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
               me.name, source_p->name, topic);
    fclose(file);
    return;
  }

  line[strlen(line) - 1] = '\0';
  sendto_one(source_p, form_str(RPL_HELPSTART),
             me.name, source_p->name, topic, line);

  while (fgets(line, sizeof(line), file))
  {
    line[strlen(line) - 1] = '\0';

    sendto_one(source_p, form_str(RPL_HELPTXT),
               me.name, source_p->name, topic, line);
  }

  fclose(file);
  sendto_one(source_p, form_str(RPL_ENDOFHELP),
             me.name, source_p->name, topic);
}

static void
dohelp(struct Client *source_p, char *topic)
{
  char *p = topic;
  char h_index[] = "index";
  char path[HYB_PATH_MAX + 1];
  struct stat sb;

  if (EmptyString(topic))
    topic = h_index;
  else
    for (; *p; ++p)
      *p = ToLower(*p);

  if (strpbrk(topic, "/\\"))
  {
    sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
               me.name, source_p->name, topic);
    return;
  }

  if (strlen(HPATH) + strlen(topic) + 1 > HYB_PATH_MAX)
  {
    sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
               me.name, source_p->name, topic);
    return;
  }

  snprintf(path, sizeof(path), "%s/%s", HPATH, topic);

  if (stat(path, &sb) < 0)
  {
    sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
               me.name, source_p->name, topic);
    return;
  }

  if (!S_ISREG(sb.st_mode))
  {
    sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
               me.name, source_p->name, topic);
    return;
  }

  sendhelpfile(source_p, path, topic);
}

/*
 * m_help - HELP message handler
 *      parv[0] = sender prefix
 */
static void
m_help(struct Client *client_p, struct Client *source_p,
       int parc, char *parv[])
{
  static time_t last_used = 0;

  /* HELP is always local */
  if ((last_used + ConfigFileEntry.pace_wait_simple) > CurrentTime)
  {
    /* safe enough to give this on a local connect only */
    sendto_one(source_p,form_str(RPL_LOAD2HI),
               me.name, source_p->name);
    return;
  }

  last_used = CurrentTime;

  dohelp(source_p, parv[1]);
}

/*
 * mo_help - HELP message handler
 *      parv[0] = sender prefix
 */
static void
mo_help(struct Client *client_p, struct Client *source_p,
        int parc, char *parv[])
{
  dohelp(source_p, parv[1]);
}

static struct Message help_msgtab = {
  "HELP", 0, 0, 0, MAXPARA, MFLG_SLOW, 0,
  {m_unregistered, m_help, m_ignore, m_ignore, mo_help, m_ignore}
};

static void
module_init(void)
{
  mod_add_cmd(&help_msgtab);
}

static void
module_exit(void)
{
  mod_del_cmd(&help_msgtab);
}

struct module module_entry = {
  .node    = { NULL, NULL, NULL },
  .name    = NULL,
  .version = "$Revision$",
  .handle  = NULL,
  .modinit = module_init,
  .modexit = module_exit,
  .flags   = 0
};
Revision:	2657
Committed:	Thu Dec 12 19:04:53 2013 UTC (11 years, 8 months ago) by michael
Content type:	text/x-csrc
File size:	4280 byte(s)
Log Message:	- m_help.c:sendhelpfile(): fixed fd leak
#	Content
1	/*
2	* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3	* m_help.c: Provides help information to a user/operator.
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 "stdinc.h"
26	#include "client.h"
27	#include "ircd.h"
28	#include "numeric.h"
29	#include "send.h"
30	#include "conf.h"
31	#include "parse.h"
32	#include "modules.h"
33	#include "irc_string.h"
34
35	#define HELPLEN 400
36
37
38	static void
39	sendhelpfile(struct Client source_p, const char path, const char *topic)
40	{
41	FILE *file = NULL;
42	char line[HELPLEN] = { '\0' };
43
44	if ((file = fopen(path, "r")) == NULL)
45	{
46	sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
47	me.name, source_p->name, topic);
48	return;
49	}
50
51	if (fgets(line, sizeof(line), file) == NULL)
52	{
53	sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
54	me.name, source_p->name, topic);
55	fclose(file);
56	return;
57	}
58
59	line[strlen(line) - 1] = '\0';
60	sendto_one(source_p, form_str(RPL_HELPSTART),
61	me.name, source_p->name, topic, line);
62
63	while (fgets(line, sizeof(line), file))
64	{
65	line[strlen(line) - 1] = '\0';
66
67	sendto_one(source_p, form_str(RPL_HELPTXT),
68	me.name, source_p->name, topic, line);
69	}
70
71	fclose(file);
72	sendto_one(source_p, form_str(RPL_ENDOFHELP),
73	me.name, source_p->name, topic);
74	}
75
76	static void
77	dohelp(struct Client source_p, char topic)
78	{
79	char *p = topic;
80	char h_index[] = "index";
81	char path[HYB_PATH_MAX + 1];
82	struct stat sb;
83
84	if (EmptyString(topic))
85	topic = h_index;
86	else
87	for (; *p; ++p)
88	p = ToLower(p);
89
90	if (strpbrk(topic, "/\\"))
91	{
92	sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
93	me.name, source_p->name, topic);
94	return;
95	}
96
97	if (strlen(HPATH) + strlen(topic) + 1 > HYB_PATH_MAX)
98	{
99	sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
100	me.name, source_p->name, topic);
101	return;
102	}
103
104	snprintf(path, sizeof(path), "%s/%s", HPATH, topic);
105
106	if (stat(path, &sb) < 0)
107	{
108	sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
109	me.name, source_p->name, topic);
110	return;
111	}
112
113	if (!S_ISREG(sb.st_mode))
114	{
115	sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
116	me.name, source_p->name, topic);
117	return;
118	}
119
120	sendhelpfile(source_p, path, topic);
121	}
122
123	/*
124	* m_help - HELP message handler
125	* parv[0] = sender prefix
126	*/
127	static void
128	m_help(struct Client client_p, struct Client source_p,
129	int parc, char *parv[])
130	{
131	static time_t last_used = 0;
132
133	/* HELP is always local */
134	if ((last_used + ConfigFileEntry.pace_wait_simple) > CurrentTime)
135	{
136	/* safe enough to give this on a local connect only */
137	sendto_one(source_p,form_str(RPL_LOAD2HI),
138	me.name, source_p->name);
139	return;
140	}
141
142	last_used = CurrentTime;
143
144	dohelp(source_p, parv[1]);
145	}
146
147	/*
148	* mo_help - HELP message handler
149	* parv[0] = sender prefix
150	*/
151	static void
152	mo_help(struct Client client_p, struct Client source_p,
153	int parc, char *parv[])
154	{
155	dohelp(source_p, parv[1]);
156	}
157
158	static struct Message help_msgtab = {
159	"HELP", 0, 0, 0, MAXPARA, MFLG_SLOW, 0,
160	{m_unregistered, m_help, m_ignore, m_ignore, mo_help, m_ignore}
161	};
162
163	static void
164	module_init(void)
165	{
166	mod_add_cmd(&help_msgtab);
167	}
168
169	static void
170	module_exit(void)
171	{
172	mod_del_cmd(&help_msgtab);
173	}
174
175	struct module module_entry = {
176	.node = { NULL, NULL, NULL },
177	.name = NULL,
178	.version = "$Revision$",
179	.handle = NULL,
180	.modinit = module_init,
181	.modexit = module_exit,
182	.flags = 0
183	};