1 // -*- mode: C++; indent-tabs-mode: nil; -*-
2 // epist.cc for Epistory - a key handler for NETWM/EWMH window managers.
3 // Copyright (c) 2002 - 2002 Ben Jansens <ben at orodu.net>
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:
12 // The above copyright notice and this permission notice shall be included in
13 // all copies or substantial portions of the Software.
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.
24 # include "../../config.h"
25 #endif // HAVE_CONFIG_H
29 # include <sys/types.h>
31 #endif // HAVE_UNISTD_H
35 #endif // HAVE_STDLIB_H
39 #endif // HAVE_SIGNAL_H
43 #endif // HAVE_LIBGEN_H
55 #include "../../src/XAtom.hh"
57 bool _shutdown = false;
59 char *_display_name = 0;
60 Display *_display = 0;
66 static void signalhandler(int sig)
67 #else // HAVE_SIGACTION
68 static RETSIGTYPE signalhandler(int sig)
69 #endif // HAVE_SIGACTION
73 cout << "epist: Segmentation fault. Aborting and dumping core.\n";
76 cout << "epist: Restarting on request.\n";
77 execvp(_argv[0], _argv);
78 execvp(basename(_argv[0]), _argv);
82 #ifndef HAVE_SIGACTION
83 // assume broken, braindead sysv signal semantics
84 signal(sig, (RETSIGTYPE (*)(int)) signalhandler);
85 #endif // HAVE_SIGACTION
89 void parseCommandLine(int argc, char **argv) {
92 for (int i = 1; i < argc; ++i) {
93 if (string(argv[i]) == "-display") {
95 cout << "error:: '-display' requires an argument\n";
98 _display_name = argv[i];
100 string dtmp = (string)"DISPLAY=" + _display_name;
101 if (putenv(const_cast<char*>(dtmp.c_str()))) {
102 cout << "warning: couldn't set environment variable 'DISPLAY'\n";
110 bool findSupportingWM() {
112 if (! _xatom->getValue(_root, XAtom::net_supporting_wm_check, XAtom::window,
113 support_win) || support_win == None)
117 _xatom->getValue(support_win, XAtom::net_wm_name, XAtom::utf8, title);
118 cout << "Found compatible window manager: " << title << endl;
123 int main(int argc, char **argv) {
124 #ifdef HAVE_SIGACTION
125 struct sigaction action;
127 action.sa_handler = signalhandler;
128 action.sa_mask = sigset_t();
129 action.sa_flags = SA_NOCLDSTOP | SA_NODEFER;
131 sigaction(SIGPIPE, &action, NULL);
132 sigaction(SIGSEGV, &action, NULL);
133 sigaction(SIGFPE, &action, NULL);
134 sigaction(SIGTERM, &action, NULL);
135 sigaction(SIGINT, &action, NULL);
136 sigaction(SIGHUP, &action, NULL);
137 #else // !HAVE_SIGACTION
138 signal(SIGPIPE, (RETSIGTYPE (*)(int)) signalhandler);
139 signal(SIGSEGV, (RETSIGTYPE (*)(int)) signalhandler);
140 signal(SIGFPE, (RETSIGTYPE (*)(int)) signalhandler);
141 signal(SIGTERM, (RETSIGTYPE (*)(int)) signalhandler);
142 signal(SIGINT, (RETSIGTYPE (*)(int)) signalhandler);
143 signal(SIGHUP, (RETSIGTYPE (*)(int)) signalhandler);
144 #endif // HAVE_SIGACTION
146 parseCommandLine(argc, argv);
148 _display = XOpenDisplay(_display_name);
150 cout << "Connection to X server '" << _display_name << "' failed.\n";
153 _root = RootWindow(_display, DefaultScreen(_display));
154 _xatom = new XAtom(_display);
156 XSelectInput(_display, _root, PropertyChangeMask);
158 // find a window manager supporting NETWM, waiting for it to load if we must
159 while (! (_shutdown || findSupportingWM()));
163 updateActiveWindow();
166 while (! _shutdown) {
167 if (XPending(_display)) {
169 XNextEvent(_display, &e);
177 XCloseDisplay(_display);