8.2.x/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);
    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:	2045
Committed:	Wed May 15 15:32:01 2013 UTC (13 years, 2 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid/trunk/modules/m_help.c*
File size:	4262 byte(s)
Log Message:	- m_help.c: minor changes to dohelp() (use pointer arithmetic instead of indexing)
#	User	Rev	Content
1	adx	30	/*
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	knight	31	* $Id$
23	adx	30	*/
24
25			#include "stdinc.h"
26			#include "client.h"
27			#include "ircd.h"
28			#include "numeric.h"
29			#include "send.h"
30	michael	1309	#include "conf.h"
31	adx	30	#include "parse.h"
32			#include "modules.h"
33			#include "irc_string.h"
34
35			#define HELPLEN 400
36
37
38			static void
39	michael	1997	sendhelpfile(struct Client source_p, const char path, const char *topic)
40	adx	30	{
41	michael	2028	FILE *file = NULL;
42			char line[HELPLEN] = { '\0' };
43	adx	30
44	michael	1997	if ((file = fopen(path, "r")) == NULL)
45	adx	30	{
46	michael	1997	sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
47			me.name, source_p->name, topic);
48	adx	30	return;
49			}
50
51	michael	1997	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			return;
56			}
57	adx	30
58	michael	1997	line[strlen(line) - 1] = '\0';
59			sendto_one(source_p, form_str(RPL_HELPSTART),
60			me.name, source_p->name, topic, line);
61	adx	30
62	michael	1997	while (fgets(line, sizeof(line), file))
63			{
64			line[strlen(line) - 1] = '\0';
65	adx	30
66	michael	1997	sendto_one(source_p, form_str(RPL_HELPTXT),
67			me.name, source_p->name, topic, line);
68			}
69
70			fclose(file);
71			sendto_one(source_p, form_str(RPL_ENDOFHELP),
72			me.name, source_p->name, topic);
73	adx	30	}
74
75			static void
76	michael	2028	dohelp(struct Client source_p, char topic)
77	adx	30	{
78	michael	2045	char *p = topic;
79	michael	575	char h_index[] = "index";
80	michael	1737	char path[HYB_PATH_MAX + 1];
81	adx	30	struct stat sb;
82
83	michael	1674	if (EmptyString(topic))
84			topic = h_index;
85	adx	30	else
86	michael	2045	for (; *p; ++p)
87			p = ToLower(p);
88	adx	30
89			if (strpbrk(topic, "/\\"))
90			{
91	michael	1834	sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
92	adx	30	me.name, source_p->name, topic);
93			return;
94			}
95
96	michael	2028	if (strlen(HPATH) + strlen(topic) + 1 > HYB_PATH_MAX)
97	adx	30	{
98	michael	1834	sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
99	adx	30	me.name, source_p->name, topic);
100			return;
101			}
102
103	michael	2028	snprintf(path, sizeof(path), "%s/%s", HPATH, topic);
104	adx	30
105			if (stat(path, &sb) < 0)
106			{
107	michael	1834	sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
108	adx	30	me.name, source_p->name, topic);
109			return;
110			}
111
112			if (!S_ISREG(sb.st_mode))
113			{
114	michael	1834	sendto_one(source_p, form_str(ERR_HELPNOTFOUND),
115	adx	30	me.name, source_p->name, topic);
116			return;
117			}
118
119			sendhelpfile(source_p, path, topic);
120			}
121
122	michael	1997	/*
123			* m_help - HELP message handler
124			* parv[0] = sender prefix
125			*/
126			static void
127			m_help(struct Client client_p, struct Client source_p,
128			int parc, char *parv[])
129	adx	30	{
130	michael	1997	static time_t last_used = 0;
131	adx	30
132	michael	1997	/* HELP is always local */
133			if ((last_used + ConfigFileEntry.pace_wait_simple) > CurrentTime)
134	adx	30	{
135	michael	1997	/* safe enough to give this on a local connect only */
136			sendto_one(source_p,form_str(RPL_LOAD2HI),
137			me.name, source_p->name);
138	adx	30	return;
139			}
140
141	michael	1997	last_used = CurrentTime;
142	adx	30
143	michael	2028	dohelp(source_p, parv[1]);
144	michael	1997	}
145	adx	30
146	michael	1997	/*
147			* mo_help - HELP message handler
148			* parv[0] = sender prefix
149			*/
150			static void
151			mo_help(struct Client client_p, struct Client source_p,
152			int parc, char *parv[])
153			{
154	michael	2028	dohelp(source_p, parv[1]);
155	michael	1997	}
156	michael	1674
157	michael	1230	static struct Message help_msgtab = {
158	michael	1699	"HELP", 0, 0, 0, MAXPARA, MFLG_SLOW, 0,
159	michael	1230	{m_unregistered, m_help, m_ignore, m_ignore, mo_help, m_ignore}
160			};
161
162			static void
163			module_init(void)
164			{
165			mod_add_cmd(&help_msgtab);
166			}
167
168			static void
169			module_exit(void)
170			{
171			mod_del_cmd(&help_msgtab);
172			}
173
174			struct module module_entry = {
175			.node = { NULL, NULL, NULL },
176			.name = NULL,
177			.version = "$Revision$",
178			.handle = NULL,
179			.modinit = module_init,
180			.modexit = module_exit,
181			.flags = 0
182			};