1 /*
2 * Copyright (c) 2005 William Pitcock, et al.
3 * Rights to this code are as documented in doc/LICENSE.
4 *
5 * This file contains code for the ChanServ CLEAR USERS function.
6 *
7 */
8
9 #include "atheme.h"
10
11 DECLARE_MODULE_V1
12 (
13 "chanserv/clear_users", false, _modinit, _moddeinit,
14 PACKAGE_STRING,
15 VENDOR_STRING
16 );
17
18 static void cs_cmd_clear_users(sourceinfo_t *si, int parc, char *parv[]);
19
20 command_t cs_clear_users = { "USERS", N_("Kicks all users from a channel."),
21 AC_NONE, 2, cs_cmd_clear_users, { .path = "cservice/clear_users" } };
22
23 mowgli_patricia_t **cs_clear_cmds;
24
_modinit(module_t * m)25 void _modinit(module_t *m)
26 {
27 MODULE_TRY_REQUEST_SYMBOL(m, cs_clear_cmds, "chanserv/clear", "cs_clear_cmds");
28
29 command_add(&cs_clear_users, *cs_clear_cmds);
30 }
31
_moddeinit(module_unload_intent_t intent)32 void _moddeinit(module_unload_intent_t intent)
33 {
34 command_delete(&cs_clear_users, *cs_clear_cmds);
35 }
36
cs_cmd_clear_users(sourceinfo_t * si,int parc,char * parv[])37 static void cs_cmd_clear_users(sourceinfo_t *si, int parc, char *parv[])
38 {
39 char fullreason[200];
40 channel_t *c;
41 char *channel = parv[0];
42 mychan_t *mc = mychan_find(channel);
43 chanuser_t *cu;
44 mowgli_node_t *n, *tn;
45 int oldlimit;
46 unsigned int nmembers;
47
48 if (parc >= 2)
49 snprintf(fullreason, sizeof fullreason, "CLEAR USERS used by %s: %s", get_source_name(si), parv[1]);
50 else
51 snprintf(fullreason, sizeof fullreason, "CLEAR USERS used by %s", get_source_name(si));
52
53 if (!mc)
54 {
55 command_fail(si, fault_nosuch_target, _("Channel \2%s\2 is not registered."), channel);
56 return;
57 }
58
59 if (!(c = channel_find(channel)))
60 {
61 command_fail(si, fault_nosuch_target, _("\2%s\2 is currently empty."), channel);
62 return;
63 }
64
65 if (!chanacs_source_has_flag(mc, si, CA_RECOVER))
66 {
67 command_fail(si, fault_noprivs, _("You are not authorized to perform this operation."));
68 return;
69 }
70
71 if (metadata_find(mc, "private:close:closer"))
72 {
73 command_fail(si, fault_noprivs, _("\2%s\2 is closed."), channel);
74 return;
75 }
76
77 command_add_flood(si, MOWGLI_LIST_LENGTH(&c->members) > 3 ? FLOOD_HEAVY : FLOOD_MODERATE);
78
79 /* stop a race condition where users can rejoin */
80 oldlimit = c->limit;
81 if (oldlimit != 1)
82 modestack_mode_limit(chansvs.nick, c, MTYPE_ADD, 1);
83 modestack_flush_channel(c);
84
85 MOWGLI_ITER_FOREACH_SAFE(n, tn, c->members.head)
86 {
87 cu = n->data;
88
89 /* don't kick the user who requested the masskick */
90 if (cu->user == si->su || is_internal_client(cu->user))
91 continue;
92
93 nmembers = MOWGLI_LIST_LENGTH(&c->members);
94 try_kick(chansvs.me->me, c, cu->user, fullreason);
95 /* If there are only two users remaining before the kick,
96 * it is possible that the last user is chanserv which will
97 * part if leave_chans is enabled. If it is a permanent
98 * channel this will leave an empty channel, otherwise the
99 * channel will have been destroyed. In either case, it is
100 * not safe to continue.
101 *
102 * Kicking the last user is safe, tn will be NULL and
103 * MOWGLI_ITER_FOREACH_SAFE will stop without touching any part
104 * of the channel structure.
105 */
106 if (nmembers == 2 && ((c = channel_find(channel)) == NULL ||
107 MOWGLI_LIST_LENGTH(&c->members) == 0))
108 break;
109 }
110
111 /* the channel may be empty now, so our pointer may be bogus! */
112 c = channel_find(channel);
113 if (c != NULL)
114 {
115 if ((mc->flags & MC_GUARD) && !config_options.leave_chans
116 && c != NULL &&
117 (si->su == NULL || !chanuser_find(c, si->su)))
118 {
119 /* Always cycle it if the requester is not on channel
120 * -- jilles */
121 part(channel, chansvs.nick);
122 }
123 /* could be permanent channel, blah */
124 c = channel_find(channel);
125 if (c != NULL)
126 {
127 if (oldlimit == 0)
128 modestack_mode_limit(chansvs.nick, c, MTYPE_DEL, 0);
129 else if (oldlimit != 1)
130 modestack_mode_limit(chansvs.nick, c, MTYPE_ADD, oldlimit);
131 }
132 }
133
134 logcommand(si, CMDLOG_DO, "CLEAR:USERS: \2%s\2", mc->name);
135
136 command_success_nodata(si, _("Cleared users from \2%s\2."), channel);
137 }
138
139 /* vim:cinoptions=>s,e0,n0,f0,{0,}0,^0,=s,ps,t0,c3,+s,(2s,us,)20,*30,gs,hs
140 * vim:ts=8
141 * vim:sw=8
142 * vim:noexpandtab
143 */
144