Dogcows Code - chaz/openbox/blob - util/epist/main.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; -*-
   2 // main.cc for Epistory - a key handler for NETWM/EWMH window managers.
   3 // Copyright (c) 2002 - 2002 Ben Jansens <ben at orodu.net>
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining a
   6 // copy of this software and associated documentation files (the "Software"),
   7 // to deal in the Software without restriction, including without limitation
   8 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9 // and/or sell copies of the Software, and to permit persons to whom the
  10 // Software is furnished to do so, subject to the following conditions:
  11 //
  12 // The above copyright notice and this permission notice shall be included in
  13 // all copies or substantial portions of the Software.
  14 //
  15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21 // DEALINGS IN THE SOFTWARE.
  22
  23 #ifdef    HAVE_CONFIG_H
  24 #  include "../../config.h"
  25 #endif // HAVE_CONFIG_H
  26
  27 extern "C" {
  28 #ifdef    HAVE_UNISTD_H
  29 #  include <sys/types.h>
  30 #  include <unistd.h>
  31 #endif // HAVE_UNISTD_H
  32
  33 #ifdef    HAVE_SIGNAL_H
  34 #  include <signal.h>
  35 #endif // HAVE_SIGNAL_H
  36
  37 #ifdef    HAVE_SYS_SIGNAL_H
  38 #  include <sys/signal.h>
  39 #endif // HAVE_SYS_SIGNAL_H
  40
  41 #ifdef    HAVE_LIBGEN_H
  42 #  include <libgen.h>
  43 #endif // HAVE_LIBGEN_H
  44 }
  45
  46 #include <iostream>
  47
  48 using std::cout;
  49 using std::endl;
  50
  51 bool _shutdown = false;
  52 char **_argv;
  53
  54 #ifdef   HAVE_SIGACTION
  55 static void signalhandler(int sig)
  56 #else //  HAVE_SIGACTION
  57 static RETSIGTYPE signalhandler(int sig)
  58 #endif // HAVE_SIGACTION
  59 {
  60   switch (sig) {
  61   case SIGSEGV:
  62     cout << "Segmentation fault. Aborting and dumping core.\n";
  63     abort();
  64   case SIGHUP:
  65     cout << "Restarting on request.\n";
  66     execvp(_argv[0], _argv);
  67     execvp(basename(_argv[0]), _argv);
  68   }
  69   _shutdown = true;
  70
  71 #ifndef   HAVE_SIGACTION
  72   // assume broken, braindead sysv signal semantics
  73   signal(sig, (RETSIGTYPE (*)(int)) signalhandler);
  74 #endif // HAVE_SIGACTION
  75 }
  76
  77 int main(int, char **argv) {
  78   _argv = argv;
  79
  80 #ifdef    HAVE_SIGACTION
  81   struct sigaction action;
  82
  83   action.sa_handler = signalhandler;
  84   action.sa_mask = sigset_t();
  85   action.sa_flags = SA_NOCLDSTOP | SA_NODEFER;
  86
  87   sigaction(SIGPIPE, &action, NULL);
  88   sigaction(SIGSEGV, &action, NULL);
  89   sigaction(SIGFPE, &action, NULL);
  90   sigaction(SIGTERM, &action, NULL);
  91   sigaction(SIGINT, &action, NULL);
  92   sigaction(SIGHUP, &action, NULL);
  93 #else // !HAVE_SIGACTION
  94   signal(SIGPIPE, (RETSIGTYPE (*)(int)) signalhandler);
  95   signal(SIGSEGV, (RETSIGTYPE (*)(int)) signalhandler);
  96   signal(SIGFPE, (RETSIGTYPE (*)(int)) signalhandler);
  97   signal(SIGTERM, (RETSIGTYPE (*)(int)) signalhandler);
  98   signal(SIGINT, (RETSIGTYPE (*)(int)) signalhandler);
  99   signal(SIGHUP, (RETSIGTYPE (*)(int)) signalhandler);
 100 #endif // HAVE_SIGACTION
 101
 102   while (! _shutdown) {
 103     usleep(500);
 104   }
 105   return 0;
 106 }