src/signals.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
   2
   3 /*  Monkey HTTP Daemon
   4  *  ------------------
   5  *  Copyright (C) 2001-2003, Eduardo Silva P.
   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 Library 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, USA.
  20  */
  21
  22 #include <pthread.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <signal.h>
  26 #include <arpa/inet.h>
  27 #include <netinet/in.h>
  28 #include <unistd.h>
  29 #include <sys/types.h>
  30 #include <sys/wait.h>
  31
  32 #include "monkey.h"
  33 #include "signals.h"
  34 #include "utils.h"
  35 #include "logfile.h"
  36 #include "chars.h"
  37 #include "clock.h"
  38
  39 /* (by Daniel R. Ome) */
  40 void mk_signal_handler(int signo)
  41 {
  42
  43 switch( signo ) {
  44         case SIGUSR2:
  45                 printf("%s => Monkey reconfiguration \n",
  46                        log_current_time.data); /* Not ready */
  47                 break;
  48
  49         case SIGINT:
  50                 mk_logger_remove_pid();
  51                 printf("\n\n%s => Interrupt from keyboard\n\n",
  52                        log_current_time.data);
  53                 exit(0);
  54         case SIGHUP:
  55                 printf("%s => Hangup\n",
  56                        log_current_time.data);
  57                 mk_signal_term();
  58                 break;
  59
  60         case SIGBUS:
  61                 printf("%s => Invalid memory reference\n",
  62                        log_current_time.data);
  63                 abort();
  64                 break;
  65
  66         case SIGPIPE:
  67                 printf("\n sigpipe");
  68                 fflush(stdout);
  69                 break;
  70
  71         case SIGSEGV:
  72                 printf("%s => Invalid memory reference\n",
  73                        log_current_time.data);
  74                 break;
  75
  76         case SIGTERM:
  77                 printf("%s => Termination signal\n",
  78                        log_current_time.data);
  79                 mk_signal_term();
  80                 break;
  81         }
  82
  83         pthread_exit(NULL);
  84 }
  85
  86 void mk_signal_init()
  87 {
  88         signal(SIGHUP , (void *) mk_signal_handler);
  89         signal(SIGINT , (void *) mk_signal_handler);
  90         signal(SIGPIPE, (void *) mk_signal_handler);
  91         signal(SIGBUS,  (void *) mk_signal_handler);
  92         signal(SIGSEGV, (void *) mk_signal_handler);
  93         signal(SIGTERM, (void *) mk_signal_handler);
  94         signal(SIGUSR2, (void *) mk_signal_handler);
  95 }
  96
  97 void mk_signal_term()
  98 {
  99         signal(SIGHUP , (void *) SIG_DFL);
 100         signal(SIGINT , (void *) SIG_DFL);
 101         signal(SIGPIPE, (void *) SIG_DFL);
 102         signal(SIGBUS,  (void *) SIG_DFL);
 103         signal(SIGSEGV, (void *) SIG_DFL);
 104         signal(SIGTERM, (void *) SIG_DFL);
 105         signal(SIGUSR2, (void *) SIG_DFL);
 106 }
 107
 108 void mk_signal_thread_sigpipe_safe()
 109 {
 110         sigset_t set, old;
 111
 112         sigemptyset(&set);
 113         sigaddset(&set, SIGPIPE);
 114         pthread_sigmask(SIG_BLOCK, &set, &old);
 115 }