sig.c

   1 /*
   2  * inoclam - Inotify+ClamAV virus scanner
   3  * Copyright (C) 2007 Vermont Department of Taxes
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  *
  19  * Contributor(s):
  20  *   Tom Cort <tom.cort@state.vt.us>
  21  */
  22
  23 #include <libdaemon/dlog.h>
  24 #include <signal.h>
  25
  26 #include "sig.h"
  27
  28 /**
  29  * Signal handler for SIGKILL
  30  * @param sig signal to handle.
  31  */
  32 void handle_sigkill(int sig)
  33 {
  34         if (sig == SIGKILL) {
  35                 exit_now = 1;
  36                 daemon_log(LOG_INFO, "(%s:%u) SIGKILL Caught ; preparing to exit", __FILE__, __LINE__);
  37         }
  38 }
  39
  40 /**
  41  * Signal handler for SIGQUIT
  42  * @param sig signal to handle.
  43  */
  44 void handle_sigquit(int sig)
  45 {
  46         if (sig == SIGQUIT) {
  47                 exit_now = 1;
  48                 daemon_log(LOG_INFO, "(%s:%u) SIGQUIT Caught ; preparing to exit", __FILE__, __LINE__);
  49         }
  50 }
  51
  52 /**
  53  * Signal handler for SIGINT
  54  * @param sig signal to handle.
  55  */
  56 void handle_sigint(int sig)
  57 {
  58         if (sig == SIGINT) {
  59                 exit_now = 1;
  60                 daemon_log(LOG_INFO, "(%s:%u) SIGINT Caught ; preparing to exit", __FILE__, __LINE__);
  61         }
  62 }
  63
  64 /**
  65  * Signal handler for SIGHUP
  66  * @param sig signal to handle.
  67  */
  68 void handle_sighup(int sig)
  69 {
  70         if (sig == SIGHUP) {
  71                 /* TODO: re-read config file */
  72                 daemon_log(LOG_INFO, "(%s:%u) SIGHUP Caught ; reconfiguring", __FILE__, __LINE__);
  73         }
  74 }
  75
  76 /**
  77  *  installs signal handlers (mostly SIG_IGN)
  78  */
  79 void install_signal_handlers()
  80 {
  81
  82         int i;
  83
  84         for (i = 0; i < 32; i++) {
  85                 if (i != SIGCHLD && i != SIGQUIT && i != SIGINT && i != SIGKILL) {
  86                         signal(i, SIG_IGN);
  87                 }
  88         }
  89
  90         signal(SIGKILL, handle_sigkill);
  91         signal(SIGQUIT, handle_sigquit);
  92         signal(SIGINT, handle_sigint);
  93         signal(SIGHUP, handle_sighup);
  94 }