bspwm.c

   1 #include <stdlib.h>
   2 #include <stdio.h>
   3 #include <string.h>
   4 #include <unistd.h>
   5 #include <signal.h>
   6 #include <fcntl.h>
   7 #include <ctype.h>
   8 #include <sys/socket.h>
   9 #include <sys/un.h>
  10 #include <sys/select.h>
  11 #include <xcb/xcb.h>
  12 #include <xcb/xcb_event.h>
  13 #include <xcb/xcb_ewmh.h>
  14 #include <xcb/randr.h>
  15 #include "types.h"
  16 #include "desktop.h"
  17 #include "monitor.h"
  18 #include "settings.h"
  19 #include "messages.h"
  20 #include "rules.h"
  21 #include "events.h"
  22 #include "common.h"
  23 #include "helpers.h"
  24 #include "window.h"
  25 #include "bspwm.h"
  26 #include "tree.h"
  27 #include "ewmh.h"
  28
  29 int main(int argc, char *argv[])
  30 {
  31     fd_set descriptors;
  32     char socket_path[MAXLEN];
  33     char *fifo_path = NULL;
  34     config_path[0] = '\0';
  35     status_prefix = NULL;
  36     int sock_fd, ret_fd, dpy_fd, sel, n;
  37     struct sockaddr_un sock_address;
  38     size_t rsp_len = 0;
  39     char msg[BUFSIZ] = {0};
  40     char rsp[BUFSIZ] = {0};
  41     xcb_generic_event_t *event;
  42     char opt;
  43
  44     while ((opt = getopt(argc, argv, "hvc:s:p:")) != -1) {
  45         switch (opt) {
  46             case 'h':
  47                 printf(WM_NAME " [-h|-v|-c CONFIG_PATH|-s PANEL_FIFO|-p PANEL_PREFIX]\n");
  48                 exit(EXIT_SUCCESS);
  49                 break;
  50             case 'v':
  51                 printf("%s\n", VERSION);
  52                 exit(EXIT_SUCCESS);
  53                 break;
  54             case 'c':
  55                 strncpy(config_path, optarg, sizeof(config_path));
  56                 break;
  57             case 's':
  58                 fifo_path = optarg;
  59                 break;
  60             case 'p':
  61                 status_prefix = optarg;
  62                 break;
  63         }
  64     }
  65
  66     if (config_path[0] == '\0') {
  67         char *config_home = getenv(CONFIG_HOME_ENV);
  68         if (config_home != NULL)
  69             snprintf(config_path, sizeof(config_path), "%s/%s/%s", config_home, WM_NAME, CONFIG_NAME);
  70         else
  71             snprintf(config_path, sizeof(config_path), "%s/%s/%s/%s", getenv("HOME"), ".config", WM_NAME, CONFIG_NAME);
  72     }
  73
  74     dpy = xcb_connect(NULL, &default_screen);
  75
  76     if (xcb_connection_has_error(dpy))
  77         err("Can't open the default display.\n");
  78
  79     setup();
  80
  81     dpy_fd = xcb_get_file_descriptor(dpy);
  82
  83     char *sp = getenv(SOCKET_ENV_VAR);
  84     strncpy(socket_path, (sp == NULL ? DEFAULT_SOCKET_PATH : sp), sizeof(socket_path));
  85
  86     sock_address.sun_family = AF_UNIX;
  87     strncpy(sock_address.sun_path, socket_path, sizeof(sock_address.sun_path));
  88     unlink(socket_path);
  89
  90     sock_fd = socket(AF_UNIX, SOCK_STREAM, 0);
  91
  92     if (sock_fd == -1)
  93         err("Couldn't create the socket.\n");
  94
  95     if (bind(sock_fd, (struct sockaddr *) &sock_address, sizeof(sock_address)) == -1)
  96         err("Couldn't bind a name to the socket.\n");
  97
  98     if (listen(sock_fd, SOMAXCONN) == -1)
  99         err("Couldn't listen to the socket.\n");
 100
 101     sel = MAX(sock_fd, dpy_fd) + 1;
 102
 103     if (fifo_path != NULL) {
 104         int fifo_fd = open(fifo_path, O_RDWR | O_NONBLOCK);
 105         if (fifo_fd != -1)
 106             status_fifo = fdopen(fifo_fd, "w");
 107         else
 108             warn("Couldn't open status fifo.\n");
 109     }
 110
 111     load_settings();
 112     run_config();
 113     running = true;
 114
 115     while (running) {
 116
 117         xcb_flush(dpy);
 118
 119         FD_ZERO(&descriptors);
 120         FD_SET(sock_fd, &descriptors);
 121         FD_SET(dpy_fd, &descriptors);
 122
 123         if (select(sel, &descriptors, NULL, NULL, NULL) > 0) {
 124
 125             if (FD_ISSET(sock_fd, &descriptors)) {
 126                 ret_fd = accept(sock_fd, NULL, 0);
 127                 if (ret_fd > 0 && (n = recv(ret_fd, msg, sizeof(msg), 0)) > 0) {
 128                     msg[n] = '\0';
 129                     if (handle_message(msg, n, rsp)) {
 130                         rsp_len = strlen(rsp);
 131                         if (rsp[rsp_len - 1] == '\n')
 132                             rsp[--rsp_len] = '\0';
 133                     } else {
 134                         rsp[0] = MESSAGE_FAILURE;
 135                         rsp_len = 1;
 136                     }
 137                     send(ret_fd, rsp, rsp_len, 0);
 138                     close(ret_fd);
 139                     rsp[0] = '\0';
 140                 }
 141             }
 142
 143             if (FD_ISSET(dpy_fd, &descriptors)) {
 144                 while ((event = xcb_poll_for_event(dpy)) != NULL) {
 145                     handle_event(event);
 146                     free(event);
 147                 }
 148             }
 149
 150         }
 151
 152         if (xcb_connection_has_error(dpy))
 153             err("The server has closed the connection.\n");
 154     }
 155
 156     cleanup();
 157     close(sock_fd);
 158     if (status_fifo != NULL)
 159         fclose(status_fifo);
 160     xcb_ewmh_connection_wipe(ewmh);
 161     xcb_destroy_window(dpy, motion_recorder);
 162     free(ewmh);
 163     xcb_flush(dpy);
 164     xcb_disconnect(dpy);
 165     return exit_status;
 166 }
 167
 168 void init(void)
 169 {
 170     num_monitors = num_desktops = num_clients = 0;
 171     monitor_uid = desktop_uid = rule_uid = 0;
 172     mon = last_mon = mon_head = mon_tail = pri_mon = NULL;
 173     rule_head = rule_tail = NULL;
 174     status_fifo = NULL;
 175     last_motion_time = last_motion_x = last_motion_y = 0;
 176     randr_base = 0;
 177     visible = auto_raise = true;
 178     exit_status = 0;
 179 }
 180
 181 void setup(void)
 182 {
 183     init();
 184     ewmh_init();
 185     screen = xcb_setup_roots_iterator(xcb_get_setup(dpy)).data;
 186     if (screen == NULL)
 187         err("Can't acquire the default screen.\n");
 188     root = screen->root;
 189     register_events();
 190
 191     screen_width = screen->width_in_pixels;
 192     screen_height = screen->height_in_pixels;
 193     root_depth = screen->root_depth;
 194
 195     uint32_t mask = XCB_CW_EVENT_MASK;
 196     uint32_t values[] = {XCB_EVENT_MASK_POINTER_MOTION};
 197     motion_recorder = xcb_generate_id(dpy);
 198     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);
 199
 200     xcb_atom_t net_atoms[] = {ewmh->_NET_SUPPORTED,
 201                               ewmh->_NET_SUPPORTING_WM_CHECK,
 202                               ewmh->_NET_DESKTOP_NAMES,
 203                               ewmh->_NET_NUMBER_OF_DESKTOPS,
 204                               ewmh->_NET_CURRENT_DESKTOP,
 205                               ewmh->_NET_CLIENT_LIST,
 206                               ewmh->_NET_ACTIVE_WINDOW,
 207                               ewmh->_NET_WM_DESKTOP,
 208                               ewmh->_NET_WM_STATE,
 209                               ewmh->_NET_WM_STATE_FULLSCREEN,
 210                               ewmh->_NET_WM_STATE_DEMANDS_ATTENTION,
 211                               ewmh->_NET_WM_WINDOW_TYPE,
 212                               ewmh->_NET_WM_WINDOW_TYPE_DOCK,
 213                               ewmh->_NET_WM_WINDOW_TYPE_DESKTOP,
 214                               ewmh->_NET_WM_WINDOW_TYPE_NOTIFICATION,
 215                               ewmh->_NET_WM_WINDOW_TYPE_DIALOG,
 216                               ewmh->_NET_WM_WINDOW_TYPE_UTILITY,
 217                               ewmh->_NET_WM_WINDOW_TYPE_TOOLBAR};
 218
 219     xcb_ewmh_set_wm_name(ewmh, root, strlen(WM_NAME), WM_NAME);
 220     xcb_ewmh_set_supported(ewmh, default_screen, LENGTH(net_atoms), net_atoms);
 221     ewmh_set_supporting(motion_recorder);
 222
 223 #define GETATOM(a) \
 224     get_atom(#a, &a);
 225     GETATOM(WM_DELETE_WINDOW)
 226     GETATOM(WM_TAKE_FOCUS)
 227     GETATOM(_BSPWM_FLOATING_WINDOW)
 228 #undef GETATOM
 229
 230     const xcb_query_extension_reply_t *qep = xcb_get_extension_data(dpy, &xcb_randr_id);
 231     if (qep->present && import_monitors()) {
 232         randr = true;
 233         randr_base = qep->first_event;
 234         xcb_randr_select_input(dpy, root, XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE);
 235     } else {
 236         randr = false;
 237         warn("Couldn't retrieve monitors via RandR.\n");
 238         xcb_rectangle_t rect = (xcb_rectangle_t) {0, 0, screen_width, screen_height};
 239         monitor_t *m = add_monitor(rect);
 240         add_desktop(m, make_desktop(NULL));
 241     }
 242
 243     ewmh_update_number_of_desktops();
 244     ewmh_update_desktop_names();
 245     ewmh_update_current_desktop();
 246     frozen_pointer = make_pointer_state();
 247     xcb_get_input_focus_reply_t *ifo = xcb_get_input_focus_reply(dpy, xcb_get_input_focus(dpy), NULL);
 248     if (ifo != NULL && (ifo->focus == XCB_INPUT_FOCUS_POINTER_ROOT || ifo->focus == XCB_NONE))
 249         clear_input_focus();
 250     free(ifo);
 251 }
 252
 253 void register_events(void)
 254 {
 255     uint32_t values[] = {ROOT_EVENT_MASK};
 256     xcb_generic_error_t *e = xcb_request_check(dpy, xcb_change_window_attributes_checked(dpy, root, XCB_CW_EVENT_MASK, values));
 257     if (e != NULL) {
 258         xcb_disconnect(dpy);
 259         err("Another window manager is already running.\n");
 260     }
 261 }
 262
 263 void quit(void)
 264 {
 265     running = false;
 266 }
 267
 268 void cleanup(void)
 269 {
 270     while (mon_head != NULL)
 271         remove_monitor(mon_head);
 272     while (rule_head != NULL)
 273         remove_rule(rule_head);
 274     free(frozen_pointer);
 275 }
 276
 277 void put_status(void)
 278 {
 279     if (status_fifo == NULL)
 280         return;
 281     if (status_prefix != NULL)
 282         fprintf(status_fifo, "%s", status_prefix);
 283     bool urgent = false;
 284     for (monitor_t *m = mon_head; m != NULL; m = m->next) {
 285         fprintf(status_fifo, "%c%s:", (mon == m ? 'M' : 'm'), m->name);
 286         for (desktop_t *d = m->desk_head; d != NULL; d = d->next, urgent = false) {
 287             for (node_t *n = first_extrema(d->root); n != NULL && !urgent; n = next_leaf(n, d->root))
 288                 urgent |= n->client->urgent;
 289             char c = (urgent ? 'u' : (d->root == NULL ? 'f' : 'o'));
 290             if (m->desk == d)
 291                 c = toupper(c);
 292             fprintf(status_fifo, "%c%s:", c, d->name);
 293         }
 294     }
 295     if (mon != NULL && mon->desk != NULL)
 296         fprintf(status_fifo, "L%s", (mon->desk->layout == LAYOUT_TILED ? "tiled" : "monocle"));
 297     fprintf(status_fifo, "\n");
 298     fflush(status_fifo);
 299 }