]>
Commit | Line | Data |
---|---|---|
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 | ||
21 | #include "stdinc.h" | |
22 | #include "ircd_signal.h" | |
23 | #include "ircd.h" /* dorehash */ | |
24 | #include "restart.h" /* server_reboot */ | |
25 | #include "logger.h" | |
26 | #include "s_conf.h" | |
27 | #include "client.h" | |
28 | #include "send.h" | |
29 | #include <sys/types.h> | |
30 | #include <sys/wait.h> | |
31 | ||
32 | /* | |
33 | * dummy_handler - don't know if this is really needed but if alarm is still | |
34 | * being used we probably will | |
35 | */ | |
36 | static void | |
37 | dummy_handler(int sig) | |
38 | { | |
39 | /* Empty */ | |
40 | } | |
41 | ||
42 | ||
43 | static void | |
44 | sigchld_handler(int sig) | |
45 | { | |
46 | int status, olderrno; | |
47 | ||
48 | olderrno = errno; | |
49 | while (waitpid(-1, &status, WNOHANG) > 0) | |
50 | ; | |
51 | errno = olderrno; | |
52 | } | |
53 | ||
54 | /* | |
55 | * sigterm_handler - exit the server | |
56 | */ | |
57 | static void | |
58 | sigterm_handler(int sig) __attribute__((noreturn)); | |
59 | ||
60 | static void | |
61 | sigterm_handler(int sig) | |
62 | { | |
63 | ircd_shutdown("Received SIGTERM"); | |
64 | } | |
65 | ||
66 | /* | |
67 | * sighup_handler - reread the server configuration | |
68 | */ | |
69 | static void | |
70 | sighup_handler(int sig) | |
71 | { | |
72 | dorehash = true; | |
73 | } | |
74 | ||
75 | /* | |
76 | * sigusr1_handler - reread the motd file | |
77 | */ | |
78 | static void | |
79 | sigusr1_handler(int sig) | |
80 | { | |
81 | doremotd = true; | |
82 | } | |
83 | ||
84 | static void | |
85 | sigusr2_handler(int sig) | |
86 | { | |
87 | dorehashbans = true; | |
88 | } | |
89 | ||
90 | /* | |
91 | * sigint_handler - restart the server | |
92 | */ | |
93 | static void | |
94 | sigint_handler(int sig) | |
95 | { | |
96 | static bool restarting = false; | |
97 | ||
98 | if(server_state_foreground) | |
99 | { | |
100 | ilog(L_MAIN, "Server exiting on SIGINT"); | |
101 | exit(0); | |
102 | } | |
103 | else | |
104 | { | |
105 | ilog(L_MAIN, "Server Restarting on SIGINT"); | |
106 | if(!restarting) | |
107 | { | |
108 | restarting = true; | |
109 | server_reboot(); | |
110 | } | |
111 | } | |
112 | } | |
113 | ||
114 | /* | |
115 | * setup_signals - initialize signal handlers for server | |
116 | */ | |
117 | void | |
118 | setup_signals() | |
119 | { | |
120 | sigset_t sigs; | |
121 | struct sigaction act; | |
122 | ||
123 | sigemptyset(&sigs); | |
124 | act.sa_flags = 0; | |
125 | act.sa_handler = SIG_IGN; | |
126 | sigemptyset(&act.sa_mask); | |
127 | sigaddset(&act.sa_mask, SIGPIPE); | |
128 | sigaddset(&act.sa_mask, SIGALRM); | |
129 | #ifdef SIGTRAP | |
130 | sigaddset(&act.sa_mask, SIGTRAP); | |
131 | #endif | |
132 | ||
133 | # ifdef SIGWINCH | |
134 | sigaddset(&act.sa_mask, SIGWINCH); | |
135 | sigaction(SIGWINCH, &act, 0); | |
136 | # endif | |
137 | sigaction(SIGPIPE, &act, 0); | |
138 | #ifdef SIGTRAP | |
139 | sigaction(SIGTRAP, &act, 0); | |
140 | #endif | |
141 | ||
142 | act.sa_handler = dummy_handler; | |
143 | sigaction(SIGALRM, &act, 0); | |
144 | sigaddset(&sigs, SIGALRM); | |
145 | ||
146 | act.sa_handler = sighup_handler; | |
147 | sigemptyset(&act.sa_mask); | |
148 | sigaddset(&act.sa_mask, SIGHUP); | |
149 | sigaction(SIGHUP, &act, 0); | |
150 | sigaddset(&sigs, SIGHUP); | |
151 | ||
152 | act.sa_handler = sigint_handler; | |
153 | sigaddset(&act.sa_mask, SIGINT); | |
154 | sigaction(SIGINT, &act, 0); | |
155 | sigaddset(&sigs, SIGINT); | |
156 | ||
157 | act.sa_handler = sigterm_handler; | |
158 | sigaddset(&act.sa_mask, SIGTERM); | |
159 | sigaction(SIGTERM, &act, 0); | |
160 | sigaddset(&sigs, SIGTERM); | |
161 | ||
162 | act.sa_handler = sigusr1_handler; | |
163 | sigaddset(&act.sa_mask, SIGUSR1); | |
164 | sigaction(SIGUSR1, &act, 0); | |
165 | sigaddset(&sigs, SIGUSR1); | |
166 | ||
167 | act.sa_handler = sigusr2_handler; | |
168 | sigaddset(&act.sa_mask, SIGUSR2); | |
169 | sigaction(SIGUSR2, &act, 0); | |
170 | sigaddset(&sigs, SIGUSR2); | |
171 | ||
172 | act.sa_handler = sigchld_handler; | |
173 | sigaddset(&act.sa_mask, SIGCHLD); | |
174 | sigaction(SIGCHLD, &act, 0); | |
175 | sigaddset(&sigs, SIGCHLD); | |
176 | ||
177 | sigprocmask(SIG_UNBLOCK, &sigs, NULL); | |
178 | } |