bspwm.c

   1 /* * Copyright (c) 2012-2013 Bastien Dejean
   2  * All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without modification,
   5  * are permitted provided that the following conditions are met:
   6  *
   7  *  * Redistributions of source code must retain the above copyright notice, this
   8  * list of conditions and the following disclaimer.
   9  *  * Redistributions in binary form must reproduce the above copyright notice,
  10  * this list of conditions and the following disclaimer in the documentation and/or
  11  * other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  16  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
  17  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  20  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  22  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  */
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <sys/select.h>
  29 #ifdef __OpenBSD__
  30 #include <sys/types.h>
  31 #endif
  32 #include <sys/socket.h>
  33 #include <sys/un.h>
  34 #include <signal.h>
  35 #include <unistd.h>
  36 #include "types.h"
  37 #include "desktop.h"
  38 #include "monitor.h"
  39 #include "settings.h"
  40 #include "messages.h"
  41 #include "subscribe.h"
  42 #include "events.h"
  43 #include "common.h"
  44 #include "window.h"
  45 #include "history.h"
  46 #include "stack.h"
  47 #include "ewmh.h"
  48 #include "bspwm.h"
  49
  50 int main(int argc, char *argv[])
  51 {
  52     fd_set descriptors;
  53     char socket_path[MAXLEN];
  54     config_path[0] = '\0';
  55     int sock_fd, ret_fd, dpy_fd, sel, n;
  56     struct sockaddr_un sock_address;
  57     size_t rsp_len = 0;
  58     char msg[BUFSIZ] = {0};
  59     char rsp[BUFSIZ] = {0};
  60     xcb_generic_event_t *event;
  61     char opt;
  62
  63     while ((opt = getopt(argc, argv, "hvc:")) != -1) {
  64         switch (opt) {
  65             case 'h':
  66                 printf(WM_NAME " [-h|-v|-c CONFIG_PATH]\n");
  67                 exit(EXIT_SUCCESS);
  68                 break;
  69             case 'v':
  70                 printf("%s\n", VERSION);
  71                 exit(EXIT_SUCCESS);
  72                 break;
  73             case 'c':
  74                 snprintf(config_path, sizeof(config_path), "%s", optarg);
  75                 break;
  76         }
  77     }
  78
  79     if (config_path[0] == '\0') {
  80         char *config_home = getenv(CONFIG_HOME_ENV);
  81         if (config_home != NULL)
  82             snprintf(config_path, sizeof(config_path), "%s/%s/%s", config_home, WM_NAME, CONFIG_NAME);
  83         else
  84             snprintf(config_path, sizeof(config_path), "%s/%s/%s/%s", getenv("HOME"), ".config", WM_NAME, CONFIG_NAME);
  85     }
  86
  87     dpy = xcb_connect(NULL, &default_screen);
  88
  89     if (xcb_connection_has_error(dpy))
  90         err("Can't open the default display.\n");
  91
  92     setup();
  93
  94     dpy_fd = xcb_get_file_descriptor(dpy);
  95
  96     char *sp = getenv(SOCKET_ENV_VAR);
  97     snprintf(socket_path, sizeof(socket_path), "%s", (sp == NULL ? DEFAULT_SOCKET_PATH : sp));
  98
  99     sock_address.sun_family = AF_UNIX;
 100     snprintf(sock_address.sun_path, sizeof(sock_address.sun_path), "%s", socket_path);
 101     unlink(socket_path);
 102
 103     sock_fd = socket(AF_UNIX, SOCK_STREAM, 0);
 104
 105     if (sock_fd == -1)
 106         err("Couldn't create the socket.\n");
 107
 108     if (bind(sock_fd, (struct sockaddr *) &sock_address, sizeof(sock_address)) == -1)
 109         err("Couldn't bind a name to the socket.\n");
 110
 111     if (listen(sock_fd, SOMAXCONN) == -1)
 112         err("Couldn't listen to the socket.\n");
 113
 114     sel = MAX(sock_fd, dpy_fd) + 1;
 115
 116     signal(SIGPIPE, SIG_IGN);
 117     load_settings();
 118     run_config();
 119     running = true;
 120
 121     while (running) {
 122
 123         xcb_flush(dpy);
 124
 125         FD_ZERO(&descriptors);
 126         FD_SET(sock_fd, &descriptors);
 127         FD_SET(dpy_fd, &descriptors);
 128
 129         if (select(sel, &descriptors, NULL, NULL, NULL) > 0) {
 130
 131             if (FD_ISSET(sock_fd, &descriptors)) {
 132                 ret_fd = accept(sock_fd, NULL, 0);
 133                 if (ret_fd > 0 && (n = recv(ret_fd, msg, sizeof(msg), 0)) > 0) {
 134                     msg[n] = '\0';
 135                     if (handle_message(msg, n, rsp)) {
 136                         rsp_len = strlen(rsp);
 137                     } else {
 138                         rsp[0] = MESSAGE_FAILURE;
 139                         rsp_len = 1;
 140                     }
 141                     if (rsp_len == 1 && rsp[0] == MESSAGE_SUBSCRIBE) {
 142                         add_subscriber(ret_fd);
 143                     } else {
 144                         send(ret_fd, rsp, rsp_len, 0);
 145                         close(ret_fd);
 146                     }
 147                     rsp[0] = '\0';
 148                 }
 149             }
 150
 151             if (FD_ISSET(dpy_fd, &descriptors)) {
 152                 while ((event = xcb_poll_for_event(dpy)) != NULL) {
 153                     handle_event(event);
 154                     free(event);
 155                 }
 156             }
 157
 158         }
 159
 160         if (xcb_connection_has_error(dpy))
 161             err("The server has closed the connection.\n");
 162     }
 163
 164     cleanup();
 165     close(sock_fd);
 166     xcb_ewmh_connection_wipe(ewmh);
 167     xcb_destroy_window(dpy, motion_recorder);
 168     free(ewmh);
 169     xcb_flush(dpy);
 170     xcb_disconnect(dpy);
 171     return exit_status;
 172 }
 173
 174 void init(void)
 175 {
 176     num_monitors = num_desktops = num_clients = 0;
 177     monitor_uid = desktop_uid = 0;
 178     mon = mon_head = mon_tail = pri_mon = NULL;
 179     history_head = history_tail = history_needle = NULL;
 180     stack_head = stack_tail = NULL;
 181     subscribe_head = subscribe_tail = NULL;
 182     last_motion_time = last_motion_x = last_motion_y = 0;
 183     visible = auto_raise = sticky_still = record_history = true;
 184     randr_base = 0;
 185     exit_status = 0;
 186 }
 187
 188 void setup(void)
 189 {
 190     init();
 191     ewmh_init();
 192     screen = xcb_setup_roots_iterator(xcb_get_setup(dpy)).data;
 193     if (screen == NULL)
 194         err("Can't acquire the default screen.\n");
 195     root = screen->root;
 196     register_events();
 197
 198     screen_width = screen->width_in_pixels;
 199     screen_height = screen->height_in_pixels;
 200     root_depth = screen->root_depth;
 201
 202     uint32_t mask = XCB_CW_EVENT_MASK;
 203     uint32_t values[] = {XCB_EVENT_MASK_POINTER_MOTION};
 204     motion_recorder = xcb_generate_id(dpy);
 205     xcb_create_window(dpy, XCB_COPY_FROM_PARENT, motion_recorder, root, 0, 0, screen_width, screen_height, 0, XCB_WINDOW_CLASS_INPUT_ONLY, XCB_COPY_FROM_PARENT, mask, values);
 206
 207     xcb_atom_t net_atoms[] = {ewmh->_NET_SUPPORTED,
 208                               ewmh->_NET_SUPPORTING_WM_CHECK,
 209                               ewmh->_NET_DESKTOP_NAMES,
 210                               ewmh->_NET_NUMBER_OF_DESKTOPS,
 211                               ewmh->_NET_CURRENT_DESKTOP,
 212                               ewmh->_NET_CLIENT_LIST,
 213                               ewmh->_NET_ACTIVE_WINDOW,
 214                               ewmh->_NET_CLOSE_WINDOW,
 215                               ewmh->_NET_WM_DESKTOP,
 216                               ewmh->_NET_WM_STATE,
 217                               ewmh->_NET_WM_STATE_FULLSCREEN,
 218                               ewmh->_NET_WM_STATE_STICKY,
 219                               ewmh->_NET_WM_STATE_DEMANDS_ATTENTION,
 220                               ewmh->_NET_WM_WINDOW_TYPE,
 221                               ewmh->_NET_WM_WINDOW_TYPE_DOCK,
 222                               ewmh->_NET_WM_WINDOW_TYPE_DESKTOP,
 223                               ewmh->_NET_WM_WINDOW_TYPE_NOTIFICATION,
 224                               ewmh->_NET_WM_WINDOW_TYPE_DIALOG,
 225                               ewmh->_NET_WM_WINDOW_TYPE_UTILITY,
 226                               ewmh->_NET_WM_WINDOW_TYPE_TOOLBAR};
 227
 228     xcb_ewmh_set_supported(ewmh, default_screen, LENGTH(net_atoms), net_atoms);
 229     ewmh_set_supporting(motion_recorder);
 230
 231 #define GETATOM(a) \
 232     get_atom(#a, &a);
 233     GETATOM(WM_DELETE_WINDOW)
 234     GETATOM(WM_TAKE_FOCUS)
 235     GETATOM(_BSPWM_FLOATING_WINDOW)
 236     GETATOM(_NET_WM_WINDOW_OPACITY)
 237 #undef GETATOM
 238
 239     const xcb_query_extension_reply_t *qep = xcb_get_extension_data(dpy, &xcb_randr_id);
 240     if (qep->present && import_monitors()) {
 241         randr = true;
 242         randr_base = qep->first_event;
 243         xcb_randr_select_input(dpy, root, XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE);
 244     } else {
 245         randr = false;
 246         warn("Couldn't retrieve monitors via RandR.\n");
 247         xcb_rectangle_t rect = (xcb_rectangle_t) {0, 0, screen_width, screen_height};
 248         monitor_t *m = add_monitor(rect);
 249         add_desktop(m, make_desktop(NULL));
 250     }
 251
 252     ewmh_update_number_of_desktops();
 253     ewmh_update_desktop_names();
 254     ewmh_update_current_desktop();
 255     frozen_pointer = make_pointer_state();
 256     xcb_get_input_focus_reply_t *ifo = xcb_get_input_focus_reply(dpy, xcb_get_input_focus(dpy), NULL);
 257     if (ifo != NULL && (ifo->focus == XCB_INPUT_FOCUS_POINTER_ROOT || ifo->focus == XCB_NONE))
 258         clear_input_focus();
 259     free(ifo);
 260 }
 261
 262 void register_events(void)
 263 {
 264     uint32_t values[] = {ROOT_EVENT_MASK};
 265     xcb_generic_error_t *e = xcb_request_check(dpy, xcb_change_window_attributes_checked(dpy, root, XCB_CW_EVENT_MASK, values));
 266     if (e != NULL) {
 267         xcb_disconnect(dpy);
 268         err("Another window manager is already running.\n");
 269     }
 270 }
 271
 272 void quit(void)
 273 {
 274     running = false;
 275 }
 276
 277 void cleanup(void)
 278 {
 279     while (mon_head != NULL)
 280         remove_monitor(mon_head);
 281     while (stack_head != NULL)
 282         remove_stack(stack_head);
 283     while (subscribe_head != NULL)
 284         remove_subscriber(subscribe_head);
 285     empty_history();
 286     free(frozen_pointer);
 287 }
 288
 289 void put_status(void)
 290 {
 291     subscriber_list_t *sb = subscribe_head;
 292     while (sb != NULL) {
 293         subscriber_list_t *next = sb->next;
 294         feed_subscriber(sb);
 295         sb = next;
 296     }
 297 }