open an X display

[chaz/openbox] / util / epist / main.cc

diff --git a/util/epist/main.cc b/util/epist/main.cc
index 7b48abd98f1eaf0de09db21ece308a6216a3757d..c7c1a768663c2349db7902e1a46d18d6c465f228 100644 (file)
--- a/util/epist/main.cc
+++ b/util/epist/main.cc
@@ -1,3 +1,119 @@
-int main(int, char **) {
+// -*- mode: C++; indent-tabs-mode: nil; -*-
+// main.cc for Epistory - a key handler for NETWM/EWMH window managers.
+// Copyright (c) 2002 - 2002 Ben Jansens <ben at orodu.net>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+#ifdef    HAVE_CONFIG_H
+#  include "../../config.h"
+#endif // HAVE_CONFIG_H
+
+extern "C" {
+#include <X11/Xlib.h>
+
+#ifdef    HAVE_UNISTD_H
+#  include <sys/types.h>
+#  include <unistd.h>
+#endif // HAVE_UNISTD_H
+
+#ifdef    HAVE_SIGNAL_H
+#  include <signal.h>
+#endif // HAVE_SIGNAL_H
+
+#ifdef    HAVE_SYS_SIGNAL_H
+#  include <sys/signal.h>
+#endif // HAVE_SYS_SIGNAL_H
+
+#ifdef    HAVE_LIBGEN_H
+#  include <libgen.h>
+#endif // HAVE_LIBGEN_H
+}
+
+#include <iostream>
+
+using std::cout;
+using std::endl;
+
+bool _shutdown = false;
+char **_argv;
+char *_display_name = 0;
+Display *_display = 0;
+
+#ifdef   HAVE_SIGACTION
+static void signalhandler(int sig)
+#else //  HAVE_SIGACTION
+static RETSIGTYPE signalhandler(int sig)
+#endif // HAVE_SIGACTION
+{
+  switch (sig) {
+  case SIGSEGV:
+    cout << "Segmentation fault. Aborting and dumping core.\n";
+    abort();
+  case SIGHUP:
+    cout << "Restarting on request.\n";
+    execvp(_argv[0], _argv);
+    execvp(basename(_argv[0]), _argv);
+  }
+  _shutdown = true;
+
+#ifndef   HAVE_SIGACTION
+  // assume broken, braindead sysv signal semantics
+  signal(sig, (RETSIGTYPE (*)(int)) signalhandler);
+#endif // HAVE_SIGACTION
+}
+
+
+int main(int, char **argv) {
+  _argv = argv;
+
+#ifdef    HAVE_SIGACTION
+  struct sigaction action;
+
+  action.sa_handler = signalhandler;
+  action.sa_mask = sigset_t();
+  action.sa_flags = SA_NOCLDSTOP | SA_NODEFER;
+
+  sigaction(SIGPIPE, &action, NULL);
+  sigaction(SIGSEGV, &action, NULL);
+  sigaction(SIGFPE, &action, NULL);
+  sigaction(SIGTERM, &action, NULL);
+  sigaction(SIGINT, &action, NULL);
+  sigaction(SIGHUP, &action, NULL);
+#else // !HAVE_SIGACTION
+  signal(SIGPIPE, (RETSIGTYPE (*)(int)) signalhandler);
+  signal(SIGSEGV, (RETSIGTYPE (*)(int)) signalhandler);
+  signal(SIGFPE, (RETSIGTYPE (*)(int)) signalhandler);
+  signal(SIGTERM, (RETSIGTYPE (*)(int)) signalhandler);
+  signal(SIGINT, (RETSIGTYPE (*)(int)) signalhandler);
+  signal(SIGHUP, (RETSIGTYPE (*)(int)) signalhandler);
+#endif // HAVE_SIGACTION
+
+  _display = XOpenDisplay(_display_name);
+  if (! _display) {
+    cout << "Connection to X server '" << _display_name << "' failed.\n";
+    return 1;
+  }
+
+  while (! _shutdown) {
+    usleep(500);
+  }
+
+  XCloseDisplay(_display);
   return 0;
 }