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., 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 "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", log_current_time.data);       /* Not ready */
  46         break;
  47
  48     case SIGINT:
  49         mk_logger_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 SIGBUS:
  59         printf("%s => Invalid memory reference\n", log_current_time.data);
  60         abort();
  61         break;
  62
  63     case SIGPIPE:
  64         printf("\n sigpipe");
  65         fflush(stdout);
  66         break;
  67
  68     case SIGSEGV:
  69         printf("%s => Invalid memory reference\n", log_current_time.data);
  70         break;
  71
  72     case SIGTERM:
  73         printf("%s => Termination signal\n", log_current_time.data);
  74         mk_signal_term();
  75         break;
  76     }
  77
  78     pthread_exit(NULL);
  79 }
  80
  81 void mk_signal_init()
  82 {
  83     signal(SIGHUP, (void *) mk_signal_handler);
  84     signal(SIGINT, (void *) mk_signal_handler);
  85     signal(SIGPIPE, (void *) mk_signal_handler);
  86     signal(SIGBUS, (void *) mk_signal_handler);
  87     signal(SIGSEGV, (void *) mk_signal_handler);
  88     signal(SIGTERM, (void *) mk_signal_handler);
  89     signal(SIGUSR2, (void *) mk_signal_handler);
  90 }
  91
  92 void mk_signal_term()
  93 {
  94     signal(SIGHUP, (void *) SIG_DFL);
  95     signal(SIGINT, (void *) SIG_DFL);
  96     signal(SIGPIPE, (void *) SIG_DFL);
  97     signal(SIGBUS, (void *) SIG_DFL);
  98     signal(SIGSEGV, (void *) SIG_DFL);
  99     signal(SIGTERM, (void *) SIG_DFL);
 100     signal(SIGUSR2, (void *) SIG_DFL);
 101 }
 102
 103 void mk_signal_thread_sigpipe_safe()
 104 {
 105     sigset_t set, old;
 106
 107     sigemptyset(&set);
 108     sigaddset(&set, SIGPIPE);
 109     pthread_sigmask(SIG_BLOCK, &set, &old);
 110 }