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1 | /************************************************************************ |
2 | * IRC - Internet Relay Chat, src/ircd_signal.c | |
3 | * Copyright (C) 1990 Jarkko Oikarinen and | |
4 | * University of Oulu, Computing Center | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 1, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | * | |
20 | * $Id: ircd_signal.c 6 2005-09-10 01:02:21Z nenolod $ | |
21 | */ | |
22 | ||
23 | #include "stdinc.h" | |
24 | #include "ircd_signal.h" | |
25 | #include "ircd.h" /* dorehash */ | |
26 | #include "restart.h" /* server_reboot */ | |
27 | #include "s_log.h" | |
28 | #include "memory.h" | |
29 | #include "commio.h" | |
30 | #include "s_conf.h" | |
31 | #include "client.h" | |
32 | #include "send.h" | |
33 | ||
34 | /* | |
35 | * dummy_handler - don't know if this is really needed but if alarm is still | |
36 | * being used we probably will | |
37 | */ | |
38 | static void | |
39 | dummy_handler(int sig) | |
40 | { | |
41 | /* Empty */ | |
42 | } | |
43 | ||
44 | ||
45 | static void | |
46 | sigchld_handler(int sig) | |
47 | { | |
48 | int status; | |
49 | waitpid(-1, &status, WNOHANG); | |
50 | } | |
51 | /* | |
52 | * sigterm_handler - exit the server | |
53 | */ | |
54 | static void | |
55 | sigterm_handler(int sig) | |
56 | { | |
57 | /* XXX we had a flush_connections() here - we should close all the | |
58 | * connections and flush data. read server_reboot() for my explanation. | |
59 | * -- adrian | |
60 | */ | |
61 | ilog(L_MAIN, "Server killed By SIGTERM"); | |
62 | exit(-1); | |
63 | } | |
64 | ||
65 | /* | |
66 | * sighup_handler - reread the server configuration | |
67 | */ | |
68 | static void | |
69 | sighup_handler(int sig) | |
70 | { | |
71 | dorehash = 1; | |
72 | } | |
73 | ||
74 | /* | |
75 | * sigusr1_handler - reread the motd file | |
76 | */ | |
77 | static void | |
78 | sigusr1_handler(int sig) | |
79 | { | |
80 | doremotd = 1; | |
81 | } | |
82 | ||
83 | static void | |
84 | sigusr2_handler(int sig) | |
85 | { | |
86 | dorehashbans = 1; | |
87 | } | |
88 | ||
89 | /* | |
90 | * sigint_handler - restart the server | |
91 | */ | |
92 | static void | |
93 | sigint_handler(int sig) | |
94 | { | |
95 | static int restarting = 0; | |
96 | ||
97 | if(server_state_foreground) | |
98 | { | |
99 | ilog(L_MAIN, "Server exiting on SIGINT"); | |
100 | exit(0); | |
101 | } | |
102 | else | |
103 | { | |
104 | ilog(L_MAIN, "Server Restarting on SIGINT"); | |
105 | if(restarting == 0) | |
106 | { | |
107 | restarting = 1; | |
108 | server_reboot(); | |
109 | } | |
110 | } | |
111 | } | |
112 | ||
113 | /* | |
114 | * setup_signals - initialize signal handlers for server | |
115 | */ | |
116 | void | |
117 | setup_signals() | |
118 | { | |
119 | struct sigaction act; | |
120 | ||
121 | act.sa_flags = 0; | |
122 | act.sa_handler = SIG_IGN; | |
123 | sigemptyset(&act.sa_mask); | |
124 | sigaddset(&act.sa_mask, SIGPIPE); | |
125 | sigaddset(&act.sa_mask, SIGALRM); | |
126 | #ifdef SIGTRAP | |
127 | sigaddset(&act.sa_mask, SIGTRAP); | |
128 | #endif | |
129 | ||
130 | # ifdef SIGWINCH | |
131 | sigaddset(&act.sa_mask, SIGWINCH); | |
132 | sigaction(SIGWINCH, &act, 0); | |
133 | # endif | |
134 | sigaction(SIGPIPE, &act, 0); | |
135 | #ifdef SIGTRAP | |
136 | sigaction(SIGTRAP, &act, 0); | |
137 | #endif | |
138 | ||
139 | act.sa_handler = dummy_handler; | |
140 | sigaction(SIGALRM, &act, 0); | |
141 | ||
142 | act.sa_handler = sighup_handler; | |
143 | sigemptyset(&act.sa_mask); | |
144 | sigaddset(&act.sa_mask, SIGHUP); | |
145 | sigaction(SIGHUP, &act, 0); | |
146 | ||
147 | act.sa_handler = sigint_handler; | |
148 | sigaddset(&act.sa_mask, SIGINT); | |
149 | sigaction(SIGINT, &act, 0); | |
150 | ||
151 | act.sa_handler = sigterm_handler; | |
152 | sigaddset(&act.sa_mask, SIGTERM); | |
153 | sigaction(SIGTERM, &act, 0); | |
154 | ||
155 | act.sa_handler = sigusr1_handler; | |
156 | sigaddset(&act.sa_mask, SIGUSR1); | |
157 | sigaction(SIGUSR1, &act, 0); | |
158 | ||
159 | act.sa_handler = sigusr2_handler; | |
160 | sigaddset(&act.sa_mask, SIGUSR2); | |
161 | sigaction(SIGUSR2, &act, 0); | |
162 | ||
163 | act.sa_handler = sigchld_handler; | |
164 | sigaddset(&act.sa_mask, SIGCHLD); | |
165 | sigaction(SIGCHLD, &act, 0); | |
166 | ||
167 | } |