| 1 |
/* |
| 2 |
* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd). |
| 3 |
* ircd_signal.c: responsible for ircd's signal handling |
| 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 "list.h" |
| 27 |
#include "ircd_signal.h" |
| 28 |
#include "ircd.h" /* dorehash */ |
| 29 |
#include "restart.h" /* server_die */ |
| 30 |
#include "memory.h" |
| 31 |
#include "s_bsd.h" |
| 32 |
|
| 33 |
/* |
| 34 |
* sigterm_handler - exit the server |
| 35 |
*/ |
| 36 |
static void |
| 37 |
sigterm_handler(int sig) |
| 38 |
{ |
| 39 |
server_die("received signal SIGTERM", 0); |
| 40 |
} |
| 41 |
|
| 42 |
/* |
| 43 |
* sighup_handler - reread the server configuration |
| 44 |
*/ |
| 45 |
static void |
| 46 |
sighup_handler(int sig) |
| 47 |
{ |
| 48 |
dorehash = 1; |
| 49 |
} |
| 50 |
|
| 51 |
/* |
| 52 |
* sigusr1_handler - reread the motd file |
| 53 |
*/ |
| 54 |
static void |
| 55 |
sigusr1_handler(int sig) |
| 56 |
{ |
| 57 |
doremotd = 1; |
| 58 |
} |
| 59 |
|
| 60 |
/* |
| 61 |
* |
| 62 |
* inputs - nothing |
| 63 |
* output - nothing |
| 64 |
* side effects - Reaps zombies periodically |
| 65 |
* -AndroSyn |
| 66 |
*/ |
| 67 |
static void |
| 68 |
sigchld_handler(int sig) |
| 69 |
{ |
| 70 |
int status, errno_save = errno; |
| 71 |
|
| 72 |
while (waitpid(-1, &status, WNOHANG) > 0) |
| 73 |
; |
| 74 |
errno = errno_save; |
| 75 |
} |
| 76 |
|
| 77 |
/* |
| 78 |
* sigint_handler - restart the server |
| 79 |
*/ |
| 80 |
static void |
| 81 |
sigint_handler(int sig) |
| 82 |
{ |
| 83 |
server_die("SIGINT received", !server_state.foreground); |
| 84 |
} |
| 85 |
|
| 86 |
/* |
| 87 |
* setup_signals - initialize signal handlers for server |
| 88 |
*/ |
| 89 |
void |
| 90 |
setup_signals(void) |
| 91 |
{ |
| 92 |
struct sigaction act; |
| 93 |
|
| 94 |
act.sa_flags = 0; |
| 95 |
act.sa_handler = SIG_IGN; |
| 96 |
|
| 97 |
sigemptyset(&act.sa_mask); |
| 98 |
sigaddset(&act.sa_mask, SIGPIPE); |
| 99 |
sigaddset(&act.sa_mask, SIGALRM); |
| 100 |
sigaction(SIGALRM, &act, 0); |
| 101 |
#ifdef SIGTRAP |
| 102 |
sigaddset(&act.sa_mask, SIGTRAP); |
| 103 |
#endif |
| 104 |
#ifdef SIGXFSZ |
| 105 |
sigaddset(&act.sa_mask, SIGXFSZ); |
| 106 |
sigaction(SIGXFSZ, &act, 0); |
| 107 |
#endif |
| 108 |
|
| 109 |
#ifdef SIGWINCH |
| 110 |
sigaddset(&act.sa_mask, SIGWINCH); |
| 111 |
sigaction(SIGWINCH, &act, 0); |
| 112 |
#endif |
| 113 |
sigaction(SIGPIPE, &act, 0); |
| 114 |
#ifdef SIGTRAP |
| 115 |
sigaction(SIGTRAP, &act, 0); |
| 116 |
#endif |
| 117 |
|
| 118 |
act.sa_handler = sighup_handler; |
| 119 |
sigemptyset(&act.sa_mask); |
| 120 |
sigaddset(&act.sa_mask, SIGHUP); |
| 121 |
sigaction(SIGHUP, &act, 0); |
| 122 |
|
| 123 |
act.sa_handler = sigint_handler; |
| 124 |
sigaddset(&act.sa_mask, SIGINT); |
| 125 |
sigaction(SIGINT, &act, 0); |
| 126 |
|
| 127 |
act.sa_handler = sigterm_handler; |
| 128 |
sigaddset(&act.sa_mask, SIGTERM); |
| 129 |
sigaction(SIGTERM, &act, 0); |
| 130 |
|
| 131 |
act.sa_handler = sigusr1_handler; |
| 132 |
sigaddset(&act.sa_mask, SIGUSR1); |
| 133 |
sigaction(SIGUSR1, &act, 0); |
| 134 |
|
| 135 |
act.sa_handler = sigchld_handler; |
| 136 |
sigaddset(&act.sa_mask, SIGCHLD); |
| 137 |
sigaction(SIGCHLD, &act, 0); |
| 138 |
} |
