src/signals.c

   1 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2
   3 /*  Monkey HTTP Daemon
   4  *  ------------------
   5  *  Copyright (C) 2001-2010, Eduardo Silva P. <edsiper@gmail.com>
   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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 "chars.h"
  36 #include "clock.h"
  37
  38 /* (by Daniel R. Ome) */
  39 void mk_signal_handler(int signo)
  40 {
  41
  42     switch (signo) {
  43     case SIGUSR2:
  44         /* Fixme: not yet implemented */
  45         printf("%s => Monkey reconfiguration \n", log_current_time.data);
  46         break;
  47
  48     case SIGINT:
  49         mk_utils_remove_pid();
  50         printf("\n\n%s => Interrupt from keyboard\n\n",
  51                log_current_time.data);
  52         exit(0);
  53     case SIGHUP:
  54         printf("%s => Hangup\n", log_current_time.data);
  55         mk_signal_term();
  56         break;
  57
  58     case SIGPIPE:
  59         printf("\n sigpipe");
  60         fflush(stdout);
  61         break;
  62
  63     case SIGBUS:
  64     case SIGSEGV:
  65         printf("%s => Invalid memory reference\n", log_current_time.data);
  66         break;
  67
  68     case SIGTERM:
  69         printf("%s => Termination signal\n", log_current_time.data);
  70         mk_signal_term();
  71         break;
  72     }
  73
  74     pthread_exit(NULL);
  75 }
  76
  77 void mk_signal_init()
  78 {
  79     signal(SIGHUP, (void *) mk_signal_handler);
  80     signal(SIGINT, (void *) mk_signal_handler);
  81     signal(SIGPIPE, (void *) mk_signal_handler);
  82     signal(SIGBUS, (void *) mk_signal_handler);
  83     signal(SIGSEGV, (void *) mk_signal_handler);
  84     signal(SIGTERM, (void *) mk_signal_handler);
  85     signal(SIGUSR2, (void *) mk_signal_handler);
  86 }
  87
  88 void mk_signal_term()
  89 {
  90     signal(SIGHUP, (void *) SIG_DFL);
  91     signal(SIGINT, (void *) SIG_DFL);
  92     signal(SIGPIPE, (void *) SIG_DFL);
  93     signal(SIGBUS, (void *) SIG_DFL);
  94     signal(SIGSEGV, (void *) SIG_DFL);
  95     signal(SIGTERM, (void *) SIG_DFL);
  96     signal(SIGUSR2, (void *) SIG_DFL);
  97 }
  98
  99 void mk_signal_thread_sigpipe_safe()
 100 {
 101     sigset_t set, old;
 102
 103     sigemptyset(&set);
 104     sigaddset(&set, SIGPIPE);
 105     pthread_sigmask(SIG_BLOCK, &set, &old);
 106 }