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 <sys/socket.h>
   8 #include <sys/un.h>
   9 #include <sys/select.h>
  10 #include <sys/stat.h>
  11 #include <sys/wait.h>
  12 #include <xcb/xcb.h>
  13 #include <xcb/xcb_event.h>
  14 #include <xcb/xcb_ewmh.h>
  15 #include <xcb/xinerama.h>
  16 #include "types.h"
  17 #include "settings.h"
  18 #include "messages.h"
  19 #include "rules.h"
  20 #include "events.h"
  21 #include "common.h"
  22 #include "helpers.h"
  23 #include "window.h"
  24 #include "bspwm.h"
  25 #include "tree.h"
  26 #include "ewmh.h"
  27
  28 void quit(void)
  29 {
  30     running = false;
  31 }
  32
  33 void cleanup(void)
  34 {
  35     while (mon_head != NULL)
  36         remove_monitor(mon_head);
  37     while (rule_head != NULL)
  38         remove_rule(rule_head);
  39     free(frozen_pointer);
  40 }
  41
  42 void register_events(void)
  43 {
  44     uint32_t values[] = {ROOT_EVENT_MASK};
  45     xcb_generic_error_t *e = xcb_request_check(dpy, xcb_change_window_attributes_checked(dpy, root, XCB_CW_EVENT_MASK, values));
  46     if (e != NULL) {
  47         xcb_disconnect(dpy);
  48         err("Another window manager is already running.\n");
  49     }
  50 }
  51
  52 void setup(void)
  53 {
  54     ewmh_init();
  55     screen = xcb_setup_roots_iterator(xcb_get_setup(dpy)).data;
  56     if (screen == NULL)
  57         err("Can't acquire the default screen.\n");
  58     root = screen->root;
  59     register_events();
  60
  61     screen_width = screen->width_in_pixels;
  62     screen_height = screen->height_in_pixels;
  63     root_depth = screen->root_depth;
  64
  65     uint32_t mask = XCB_CW_EVENT_MASK;
  66     uint32_t values[] = {XCB_EVENT_MASK_POINTER_MOTION};
  67     motion_recorder = xcb_generate_id(dpy);
  68     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);
  69
  70     xcb_atom_t net_atoms[] = {ewmh->_NET_SUPPORTED,
  71                               ewmh->_NET_DESKTOP_NAMES,
  72                               ewmh->_NET_NUMBER_OF_DESKTOPS,
  73                               ewmh->_NET_CURRENT_DESKTOP,
  74                               ewmh->_NET_CLIENT_LIST,
  75                               ewmh->_NET_ACTIVE_WINDOW,
  76                               ewmh->_NET_WM_DESKTOP,
  77                               ewmh->_NET_WM_STATE,
  78                               ewmh->_NET_WM_STATE_FULLSCREEN,
  79                               ewmh->_NET_WM_WINDOW_TYPE,
  80                               ewmh->_NET_WM_WINDOW_TYPE_DOCK,
  81                               ewmh->_NET_WM_WINDOW_TYPE_NOTIFICATION,
  82                               ewmh->_NET_WM_WINDOW_TYPE_DIALOG,
  83                               ewmh->_NET_WM_WINDOW_TYPE_UTILITY,
  84                               ewmh->_NET_WM_WINDOW_TYPE_TOOLBAR};
  85
  86     xcb_ewmh_set_supported(ewmh, default_screen, LENGTH(net_atoms), net_atoms);
  87
  88     xcb_intern_atom_reply_t *iar = xcb_intern_atom_reply(dpy, xcb_intern_atom(dpy, 0, strlen("_COMPTON_SHADOW"), "_COMPTON_SHADOW"), NULL);
  89
  90     if (iar != NULL) {
  91         compton_shadow = iar->atom;
  92         free(iar);
  93     }
  94
  95     monitor_uid = desktop_uid = client_uid = rule_uid = 0;
  96     mon = last_mon = mon_head = mon_tail = NULL;
  97
  98     bool xinerama_is_active = false;
  99
 100     if (xcb_get_extension_data(dpy, &xcb_xinerama_id)->present) {
 101         xcb_xinerama_is_active_reply_t *xia = xcb_xinerama_is_active_reply(dpy, xcb_xinerama_is_active(dpy), NULL);
 102         if (xia != NULL) {
 103             xinerama_is_active = xia->state;
 104             free(xia);
 105         }
 106     }
 107
 108     if (xinerama_is_active) {
 109         xcb_xinerama_query_screens_reply_t *xsq = xcb_xinerama_query_screens_reply(dpy, xcb_xinerama_query_screens(dpy), NULL);
 110         xcb_xinerama_screen_info_t *xsi = xcb_xinerama_query_screens_screen_info(xsq);
 111         int n = xcb_xinerama_query_screens_screen_info_length(xsq);
 112         for (int i = 0; i < n; i++) {
 113             xcb_xinerama_screen_info_t info = xsi[i];
 114             xcb_rectangle_t rect = (xcb_rectangle_t) {info.x_org, info.y_org, info.width, info.height};
 115             add_monitor(&rect);
 116         }
 117         free(xsq);
 118     } else {
 119         warn("Xinerama is inactive.");
 120         xcb_rectangle_t rect = (xcb_rectangle_t) {0, 0, screen_width, screen_height};
 121         add_monitor(&rect);
 122     }
 123
 124     for (monitor_t *m = mon_head; m != NULL; m = m->next)
 125         add_desktop(m, NULL);
 126
 127     ewmh_update_number_of_desktops();
 128     ewmh_update_desktop_names();
 129     ewmh_update_current_desktop();
 130     rule_head = rule_tail = NULL;
 131     frozen_pointer = make_pointer_state();
 132     split_mode = MODE_AUTOMATIC;
 133     visible = true;
 134     exit_status = 0;
 135 }
 136
 137 int main(int argc, char *argv[])
 138 {
 139     fd_set descriptors;
 140     char socket_path[MAXLEN];
 141     char *fifo_path = NULL;
 142     int sock_fd, ret_fd, dpy_fd, sel, n;
 143     struct sockaddr_un sock_address;
 144     size_t rsplen = 0;
 145     char msg[BUFSIZ] = {0};
 146     char rsp[BUFSIZ] = {0};
 147     xcb_generic_event_t *event;
 148     char opt;
 149
 150     while ((opt = getopt(argc, argv, "vs:")) != -1) {
 151         switch (opt) {
 152             case 'v':
 153                 printf("%s\n", VERSION);
 154                 exit(EXIT_SUCCESS);
 155                 break;
 156             case 's':
 157                 fifo_path = optarg;
 158                 break;
 159         }
 160     }
 161
 162     running = true;
 163     dpy = xcb_connect(NULL, &default_screen);
 164
 165     if (xcb_connection_has_error(dpy))
 166         err("Can't open the default display.\n");
 167
 168     setup();
 169
 170     dpy_fd = xcb_get_file_descriptor(dpy);
 171
 172     char *sp = getenv(SOCKET_ENV_VAR);
 173     strncpy(socket_path, (sp == NULL ? DEFAULT_SOCKET_PATH : sp), sizeof(socket_path));
 174
 175     sock_address.sun_family = AF_UNIX;
 176     strncpy(sock_address.sun_path, socket_path, sizeof(sock_address.sun_path));
 177     unlink(socket_path);
 178
 179     sock_fd = socket(AF_UNIX, SOCK_STREAM, 0);
 180
 181     if (sock_fd == -1)
 182         err("Couldn't create the socket.\n");
 183
 184     if (bind(sock_fd, (struct sockaddr *) &sock_address, sizeof(sock_address)) == -1)
 185         err("Couldn't bind a name to the socket.\n");
 186
 187     if (listen(sock_fd, SOMAXCONN) == -1)
 188         err("Couldn't listen to the socket.\n");
 189
 190     sel = MAX(sock_fd, dpy_fd) + 1;
 191
 192     if (fifo_path != NULL) {
 193         int fifo_fd = open(fifo_path, O_RDWR | O_NONBLOCK);
 194         if (fifo_fd != -1)
 195             status_fifo = fdopen(fifo_fd, "w");
 196         else
 197             warn("Couldn't open status fifo.\n");
 198     }
 199
 200     load_settings();
 201     run_autostart();
 202     ewmh_update_wm_name();
 203
 204     while (running) {
 205
 206         xcb_flush(dpy);
 207
 208         FD_ZERO(&descriptors);
 209         FD_SET(sock_fd, &descriptors);
 210         FD_SET(dpy_fd, &descriptors);
 211
 212         if (select(sel, &descriptors, NULL, NULL, NULL) > 0) {
 213
 214             if (FD_ISSET(sock_fd, &descriptors)) {
 215                 ret_fd = accept(sock_fd, NULL, 0);
 216                 if (ret_fd > 0 && (n = recv(ret_fd, msg, sizeof(msg), 0)) > 0) {
 217                     msg[n] = '\0';
 218                     process_message(msg, rsp);
 219                     rsplen = strlen(rsp);
 220                     if (rsp[rsplen - 1] == '\n')
 221                         rsp[--rsplen] = '\0';
 222                     send(ret_fd, rsp, rsplen, 0);
 223                     close(ret_fd);
 224                     rsp[0] = '\0';
 225                 }
 226             }
 227
 228             if (FD_ISSET(dpy_fd, &descriptors)) {
 229                 while ((event = xcb_poll_for_event(dpy)) != NULL) {
 230                     handle_event(event);
 231                     free(event);
 232                 }
 233             }
 234
 235         }
 236
 237         if (xcb_connection_has_error(dpy))
 238             err("The server has closed the connection.\n");
 239     }
 240
 241     cleanup();
 242     close(sock_fd);
 243     if (status_fifo != NULL)
 244         fclose(status_fifo);
 245     xcb_ewmh_connection_wipe(ewmh);
 246     xcb_destroy_window(dpy, motion_recorder);
 247     free(ewmh);
 248     xcb_flush(dpy);
 249     xcb_disconnect(dpy);
 250     return exit_status;
 251 }