i3
|
00001 /* 00002 * vim:ts=4:sw=4:expandtab 00003 * 00004 * i3 - an improved dynamic tiling window manager 00005 * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE) 00006 * 00007 * main.c: Initialization, main loop 00008 * 00009 */ 00010 #include <ev.h> 00011 #include <fcntl.h> 00012 #include <sys/types.h> 00013 #include <sys/socket.h> 00014 #include <sys/un.h> 00015 #include <sys/time.h> 00016 #include <sys/resource.h> 00017 #include <sys/mman.h> 00018 #include <sys/stat.h> 00019 #include "all.h" 00020 00021 #include "sd-daemon.h" 00022 00023 /* The original value of RLIMIT_CORE when i3 was started. We need to restore 00024 * this before starting any other process, since we set RLIMIT_CORE to 00025 * RLIM_INFINITY for i3 debugging versions. */ 00026 struct rlimit original_rlimit_core; 00027 00028 /* Whether this version of i3 is a debug build or a release build. */ 00029 bool debug_build = false; 00030 00032 int listen_fds; 00033 00034 static int xkb_event_base; 00035 00036 int xkb_current_group; 00037 00038 extern Con *focused; 00039 00040 char **start_argv; 00041 00042 xcb_connection_t *conn; 00043 /* The screen (0 when you are using DISPLAY=:0) of the connection 'conn' */ 00044 int conn_screen; 00045 00046 /* Display handle for libstartup-notification */ 00047 SnDisplay *sndisplay; 00048 00049 /* The last timestamp we got from X11 (timestamps are included in some events 00050 * and are used for some things, like determining a unique ID in startup 00051 * notification). */ 00052 xcb_timestamp_t last_timestamp = XCB_CURRENT_TIME; 00053 00054 xcb_screen_t *root_screen; 00055 xcb_window_t root; 00056 00057 /* Color depth, visual id and colormap to use when creating windows and 00058 * pixmaps. Will use 32 bit depth and an appropriate visual, if available, 00059 * otherwise the root window’s default (usually 24 bit TrueColor). */ 00060 uint8_t root_depth; 00061 xcb_visualid_t visual_id; 00062 xcb_colormap_t colormap; 00063 00064 struct ev_loop *main_loop; 00065 00066 xcb_key_symbols_t *keysyms; 00067 00068 /* Those are our connections to X11 for use with libXcursor and XKB */ 00069 Display *xlibdpy, *xkbdpy; 00070 00071 /* The list of key bindings */ 00072 struct bindings_head *bindings; 00073 00074 /* The list of exec-lines */ 00075 struct autostarts_head autostarts = TAILQ_HEAD_INITIALIZER(autostarts); 00076 00077 /* The list of exec_always lines */ 00078 struct autostarts_always_head autostarts_always = TAILQ_HEAD_INITIALIZER(autostarts_always); 00079 00080 /* The list of assignments */ 00081 struct assignments_head assignments = TAILQ_HEAD_INITIALIZER(assignments); 00082 00083 /* The list of workspace assignments (which workspace should end up on which 00084 * output) */ 00085 struct ws_assignments_head ws_assignments = TAILQ_HEAD_INITIALIZER(ws_assignments); 00086 00087 /* We hope that those are supported and set them to true */ 00088 bool xcursor_supported = true; 00089 bool xkb_supported = true; 00090 00091 /* This will be set to true when -C is used so that functions can behave 00092 * slightly differently. We don’t want i3-nagbar to be started when validating 00093 * the config, for example. */ 00094 bool only_check_config = false; 00095 00096 /* 00097 * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb. 00098 * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop 00099 * 00100 */ 00101 static void xcb_got_event(EV_P_ struct ev_io *w, int revents) { 00102 /* empty, because xcb_prepare_cb and xcb_check_cb are used */ 00103 } 00104 00105 /* 00106 * Flush before blocking (and waiting for new events) 00107 * 00108 */ 00109 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) { 00110 xcb_flush(conn); 00111 } 00112 00113 /* 00114 * Instead of polling the X connection socket we leave this to 00115 * xcb_poll_for_event() which knows better than we can ever know. 00116 * 00117 */ 00118 static void xcb_check_cb(EV_P_ ev_check *w, int revents) { 00119 xcb_generic_event_t *event; 00120 00121 while ((event = xcb_poll_for_event(conn)) != NULL) { 00122 if (event->response_type == 0) { 00123 if (event_is_ignored(event->sequence, 0)) 00124 DLOG("Expected X11 Error received for sequence %x\n", event->sequence); 00125 else { 00126 xcb_generic_error_t *error = (xcb_generic_error_t*)event; 00127 ELOG("X11 Error received! sequence 0x%x, error_code = %d\n", 00128 error->sequence, error->error_code); 00129 } 00130 free(event); 00131 continue; 00132 } 00133 00134 /* Strip off the highest bit (set if the event is generated) */ 00135 int type = (event->response_type & 0x7F); 00136 00137 handle_event(type, event); 00138 00139 free(event); 00140 } 00141 } 00142 00143 00144 /* 00145 * When using xmodmap to change the keyboard mapping, this event 00146 * is only sent via XKB. Therefore, we need this special handler. 00147 * 00148 */ 00149 static void xkb_got_event(EV_P_ struct ev_io *w, int revents) { 00150 DLOG("Handling XKB event\n"); 00151 XkbEvent ev; 00152 00153 /* When using xmodmap, every change (!) gets an own event. 00154 * Therefore, we just read all events and only handle the 00155 * mapping_notify once. */ 00156 bool mapping_changed = false; 00157 while (XPending(xkbdpy)) { 00158 XNextEvent(xkbdpy, (XEvent*)&ev); 00159 /* While we should never receive a non-XKB event, 00160 * better do sanity checking */ 00161 if (ev.type != xkb_event_base) 00162 continue; 00163 00164 if (ev.any.xkb_type == XkbMapNotify) { 00165 mapping_changed = true; 00166 continue; 00167 } 00168 00169 if (ev.any.xkb_type != XkbStateNotify) { 00170 ELOG("Unknown XKB event received (type %d)\n", ev.any.xkb_type); 00171 continue; 00172 } 00173 00174 /* See The XKB Extension: Library Specification, section 14.1 */ 00175 /* We check if the current group (each group contains 00176 * two levels) has been changed. Mode_switch activates 00177 * group XkbGroup2Index */ 00178 if (xkb_current_group == ev.state.group) 00179 continue; 00180 00181 xkb_current_group = ev.state.group; 00182 00183 if (ev.state.group == XkbGroup2Index) { 00184 DLOG("Mode_switch enabled\n"); 00185 grab_all_keys(conn, true); 00186 } 00187 00188 if (ev.state.group == XkbGroup1Index) { 00189 DLOG("Mode_switch disabled\n"); 00190 ungrab_all_keys(conn); 00191 grab_all_keys(conn, false); 00192 } 00193 } 00194 00195 if (!mapping_changed) 00196 return; 00197 00198 DLOG("Keyboard mapping changed, updating keybindings\n"); 00199 xcb_key_symbols_free(keysyms); 00200 keysyms = xcb_key_symbols_alloc(conn); 00201 00202 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms); 00203 00204 ungrab_all_keys(conn); 00205 DLOG("Re-grabbing...\n"); 00206 translate_keysyms(); 00207 grab_all_keys(conn, (xkb_current_group == XkbGroup2Index)); 00208 DLOG("Done\n"); 00209 } 00210 00211 /* 00212 * Exit handler which destroys the main_loop. Will trigger cleanup handlers. 00213 * 00214 */ 00215 static void i3_exit(void) { 00216 /* We need ev >= 4 for the following code. Since it is not *that* important (it 00217 * only makes sure that there are no i3-nagbar instances left behind) we still 00218 * support old systems with libev 3. */ 00219 #if EV_VERSION_MAJOR >= 4 00220 ev_loop_destroy(main_loop); 00221 #endif 00222 00223 if (*shmlogname != '\0') { 00224 fprintf(stderr, "Closing SHM log \"%s\"\n", shmlogname); 00225 fflush(stderr); 00226 shm_unlink(shmlogname); 00227 } 00228 } 00229 00230 /* 00231 * (One-shot) Handler for all signals with default action "Term", see signal(7) 00232 * 00233 * Unlinks the SHM log and re-raises the signal. 00234 * 00235 */ 00236 static void handle_signal(int sig, siginfo_t *info, void *data) { 00237 fprintf(stderr, "Received signal %d, terminating\n", sig); 00238 if (*shmlogname != '\0') { 00239 fprintf(stderr, "Closing SHM log \"%s\"\n", shmlogname); 00240 shm_unlink(shmlogname); 00241 } 00242 fflush(stderr); 00243 raise(sig); 00244 } 00245 00246 int main(int argc, char *argv[]) { 00247 /* Keep a symbol pointing to the I3_VERSION string constant so that we have 00248 * it in gdb backtraces. */ 00249 const char *i3_version = I3_VERSION; 00250 char *override_configpath = NULL; 00251 bool autostart = true; 00252 char *layout_path = NULL; 00253 bool delete_layout_path = false; 00254 bool force_xinerama = false; 00255 char *fake_outputs = NULL; 00256 bool disable_signalhandler = false; 00257 static struct option long_options[] = { 00258 {"no-autostart", no_argument, 0, 'a'}, 00259 {"config", required_argument, 0, 'c'}, 00260 {"version", no_argument, 0, 'v'}, 00261 {"help", no_argument, 0, 'h'}, 00262 {"layout", required_argument, 0, 'L'}, 00263 {"restart", required_argument, 0, 0}, 00264 {"force-xinerama", no_argument, 0, 0}, 00265 {"force_xinerama", no_argument, 0, 0}, 00266 {"disable-signalhandler", no_argument, 0, 0}, 00267 {"shmlog-size", required_argument, 0, 0}, 00268 {"shmlog_size", required_argument, 0, 0}, 00269 {"get-socketpath", no_argument, 0, 0}, 00270 {"get_socketpath", no_argument, 0, 0}, 00271 {"fake_outputs", required_argument, 0, 0}, 00272 {"fake-outputs", required_argument, 0, 0}, 00273 {0, 0, 0, 0} 00274 }; 00275 int option_index = 0, opt; 00276 xcb_void_cookie_t colormap_cookie; 00277 00278 setlocale(LC_ALL, ""); 00279 00280 /* Get the RLIMIT_CORE limit at startup time to restore this before 00281 * starting processes. */ 00282 getrlimit(RLIMIT_CORE, &original_rlimit_core); 00283 00284 /* Disable output buffering to make redirects in .xsession actually useful for debugging */ 00285 if (!isatty(fileno(stdout))) 00286 setbuf(stdout, NULL); 00287 00288 srand(time(NULL)); 00289 00290 /* Init logging *before* initializing debug_build to guarantee early 00291 * (file) logging. */ 00292 init_logging(); 00293 00294 /* i3_version contains either something like this: 00295 * "4.0.2 (2011-11-11, branch "release")". 00296 * or: "4.0.2-123-gCOFFEEBABE (2011-11-11, branch "next")". 00297 * 00298 * So we check for the offset of the first opening round bracket to 00299 * determine whether this is a git version or a release version. */ 00300 debug_build = ((strchr(i3_version, '(') - i3_version) > 10); 00301 00302 /* On non-release builds, disable SHM logging by default. */ 00303 shmlog_size = (debug_build ? 25 * 1024 * 1024 : 0); 00304 00305 start_argv = argv; 00306 00307 while ((opt = getopt_long(argc, argv, "c:CvaL:hld:V", long_options, &option_index)) != -1) { 00308 switch (opt) { 00309 case 'a': 00310 LOG("Autostart disabled using -a\n"); 00311 autostart = false; 00312 break; 00313 case 'L': 00314 FREE(layout_path); 00315 layout_path = sstrdup(optarg); 00316 delete_layout_path = false; 00317 break; 00318 case 'c': 00319 FREE(override_configpath); 00320 override_configpath = sstrdup(optarg); 00321 break; 00322 case 'C': 00323 LOG("Checking configuration file only (-C)\n"); 00324 only_check_config = true; 00325 break; 00326 case 'v': 00327 printf("i3 version " I3_VERSION " © 2009-2012 Michael Stapelberg and contributors\n"); 00328 exit(EXIT_SUCCESS); 00329 case 'V': 00330 set_verbosity(true); 00331 break; 00332 case 'd': 00333 LOG("Enabling debug loglevel %s\n", optarg); 00334 add_loglevel(optarg); 00335 break; 00336 case 'l': 00337 /* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */ 00338 break; 00339 case 0: 00340 if (strcmp(long_options[option_index].name, "force-xinerama") == 0 || 00341 strcmp(long_options[option_index].name, "force_xinerama") == 0) { 00342 force_xinerama = true; 00343 ELOG("Using Xinerama instead of RandR. This option should be " 00344 "avoided at all cost because it does not refresh the list " 00345 "of screens, so you cannot configure displays at runtime. " 00346 "Please check if your driver really does not support RandR " 00347 "and disable this option as soon as you can.\n"); 00348 break; 00349 } else if (strcmp(long_options[option_index].name, "disable-signalhandler") == 0) { 00350 disable_signalhandler = true; 00351 break; 00352 } else if (strcmp(long_options[option_index].name, "get-socketpath") == 0 || 00353 strcmp(long_options[option_index].name, "get_socketpath") == 0) { 00354 char *socket_path = root_atom_contents("I3_SOCKET_PATH"); 00355 if (socket_path) { 00356 printf("%s\n", socket_path); 00357 return 0; 00358 } 00359 00360 return 1; 00361 } else if (strcmp(long_options[option_index].name, "shmlog-size") == 0 || 00362 strcmp(long_options[option_index].name, "shmlog_size") == 0) { 00363 shmlog_size = atoi(optarg); 00364 /* Re-initialize logging immediately to get as many 00365 * logmessages as possible into the SHM log. */ 00366 init_logging(); 00367 LOG("Limiting SHM log size to %d bytes\n", shmlog_size); 00368 break; 00369 } else if (strcmp(long_options[option_index].name, "restart") == 0) { 00370 FREE(layout_path); 00371 layout_path = sstrdup(optarg); 00372 delete_layout_path = true; 00373 break; 00374 } else if (strcmp(long_options[option_index].name, "fake-outputs") == 0 || 00375 strcmp(long_options[option_index].name, "fake_outputs") == 0) { 00376 LOG("Initializing fake outputs: %s\n", optarg); 00377 fake_outputs = sstrdup(optarg); 00378 break; 00379 } 00380 /* fall-through */ 00381 default: 00382 fprintf(stderr, "Usage: %s [-c configfile] [-d loglevel] [-a] [-v] [-V] [-C]\n", argv[0]); 00383 fprintf(stderr, "\n"); 00384 fprintf(stderr, "\t-a disable autostart ('exec' lines in config)\n"); 00385 fprintf(stderr, "\t-c <file> use the provided configfile instead\n"); 00386 fprintf(stderr, "\t-C validate configuration file and exit\n"); 00387 fprintf(stderr, "\t-d <level> enable debug output with the specified loglevel\n"); 00388 fprintf(stderr, "\t-L <file> path to the serialized layout during restarts\n"); 00389 fprintf(stderr, "\t-v display version and exit\n"); 00390 fprintf(stderr, "\t-V enable verbose mode\n"); 00391 fprintf(stderr, "\n"); 00392 fprintf(stderr, "\t--force-xinerama\n" 00393 "\tUse Xinerama instead of RandR.\n" 00394 "\tThis option should only be used if you are stuck with the\n" 00395 "\tnvidia closed source driver which does not support RandR.\n"); 00396 fprintf(stderr, "\n"); 00397 fprintf(stderr, "\t--get-socketpath\n" 00398 "\tRetrieve the i3 IPC socket path from X11, print it, then exit.\n"); 00399 fprintf(stderr, "\n"); 00400 fprintf(stderr, "\t--shmlog-size <limit>\n" 00401 "\tLimits the size of the i3 SHM log to <limit> bytes. Setting this\n" 00402 "\tto 0 disables SHM logging entirely.\n" 00403 "\tThe default is %d bytes.\n", shmlog_size); 00404 fprintf(stderr, "\n"); 00405 fprintf(stderr, "If you pass plain text arguments, i3 will interpret them as a command\n" 00406 "to send to a currently running i3 (like i3-msg). This allows you to\n" 00407 "use nice and logical commands, such as:\n" 00408 "\n" 00409 "\ti3 border none\n" 00410 "\ti3 floating toggle\n" 00411 "\ti3 kill window\n" 00412 "\n"); 00413 exit(EXIT_FAILURE); 00414 } 00415 } 00416 00417 /* If the user passes more arguments, we act like i3-msg would: Just send 00418 * the arguments as an IPC message to i3. This allows for nice semantic 00419 * commands such as 'i3 border none'. */ 00420 if (optind < argc) { 00421 /* We enable verbose mode so that the user knows what’s going on. 00422 * This should make it easier to find mistakes when the user passes 00423 * arguments by mistake. */ 00424 set_verbosity(true); 00425 00426 LOG("Additional arguments passed. Sending them as a command to i3.\n"); 00427 char *payload = NULL; 00428 while (optind < argc) { 00429 if (!payload) { 00430 payload = sstrdup(argv[optind]); 00431 } else { 00432 char *both; 00433 sasprintf(&both, "%s %s", payload, argv[optind]); 00434 free(payload); 00435 payload = both; 00436 } 00437 optind++; 00438 } 00439 LOG("Command is: %s (%d bytes)\n", payload, strlen(payload)); 00440 char *socket_path = root_atom_contents("I3_SOCKET_PATH"); 00441 if (!socket_path) { 00442 ELOG("Could not get i3 IPC socket path\n"); 00443 return 1; 00444 } 00445 00446 int sockfd = socket(AF_LOCAL, SOCK_STREAM, 0); 00447 if (sockfd == -1) 00448 err(EXIT_FAILURE, "Could not create socket"); 00449 00450 struct sockaddr_un addr; 00451 memset(&addr, 0, sizeof(struct sockaddr_un)); 00452 addr.sun_family = AF_LOCAL; 00453 strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1); 00454 if (connect(sockfd, (const struct sockaddr*)&addr, sizeof(struct sockaddr_un)) < 0) 00455 err(EXIT_FAILURE, "Could not connect to i3"); 00456 00457 if (ipc_send_message(sockfd, strlen(payload), I3_IPC_MESSAGE_TYPE_COMMAND, 00458 (uint8_t*)payload) == -1) 00459 err(EXIT_FAILURE, "IPC: write()"); 00460 00461 uint32_t reply_length; 00462 uint8_t *reply; 00463 int ret; 00464 if ((ret = ipc_recv_message(sockfd, I3_IPC_MESSAGE_TYPE_COMMAND, 00465 &reply_length, &reply)) != 0) { 00466 if (ret == -1) 00467 err(EXIT_FAILURE, "IPC: read()"); 00468 return 1; 00469 } 00470 printf("%.*s\n", reply_length, reply); 00471 return 0; 00472 } 00473 00474 /* Enable logging to handle the case when the user did not specify --shmlog-size */ 00475 init_logging(); 00476 00477 /* Try to enable core dumps by default when running a debug build */ 00478 if (debug_build) { 00479 struct rlimit limit = { RLIM_INFINITY, RLIM_INFINITY }; 00480 setrlimit(RLIMIT_CORE, &limit); 00481 00482 /* The following code is helpful, but not required. We thus don’t pay 00483 * much attention to error handling, non-linux or other edge cases. */ 00484 char cwd[PATH_MAX]; 00485 LOG("CORE DUMPS: You are running a development version of i3, so coredumps were automatically enabled (ulimit -c unlimited).\n"); 00486 if (getcwd(cwd, sizeof(cwd)) != NULL) 00487 LOG("CORE DUMPS: Your current working directory is \"%s\".\n", cwd); 00488 int patternfd; 00489 if ((patternfd = open("/proc/sys/kernel/core_pattern", O_RDONLY)) >= 0) { 00490 memset(cwd, '\0', sizeof(cwd)); 00491 if (read(patternfd, cwd, sizeof(cwd)) > 0) 00492 /* a trailing newline is included in cwd */ 00493 LOG("CORE DUMPS: Your core_pattern is: %s", cwd); 00494 close(patternfd); 00495 } 00496 } 00497 00498 LOG("i3 (tree) version " I3_VERSION " starting\n"); 00499 00500 conn = xcb_connect(NULL, &conn_screen); 00501 if (xcb_connection_has_error(conn)) 00502 errx(EXIT_FAILURE, "Cannot open display\n"); 00503 00504 sndisplay = sn_xcb_display_new(conn, NULL, NULL); 00505 00506 /* Initialize the libev event loop. This needs to be done before loading 00507 * the config file because the parser will install an ev_child watcher 00508 * for the nagbar when config errors are found. */ 00509 main_loop = EV_DEFAULT; 00510 if (main_loop == NULL) 00511 die("Could not initialize libev. Bad LIBEV_FLAGS?\n"); 00512 00513 root_screen = xcb_aux_get_screen(conn, conn_screen); 00514 root = root_screen->root; 00515 00516 /* By default, we use the same depth and visual as the root window, which 00517 * usually is TrueColor (24 bit depth) and the corresponding visual. 00518 * However, we also check if a 32 bit depth and visual are available (for 00519 * transparency) and use it if so. */ 00520 root_depth = root_screen->root_depth; 00521 visual_id = root_screen->root_visual; 00522 colormap = root_screen->default_colormap; 00523 00524 DLOG("root_depth = %d, visual_id = 0x%08x.\n", root_depth, visual_id); 00525 00526 xcb_get_geometry_cookie_t gcookie = xcb_get_geometry(conn, root); 00527 xcb_query_pointer_cookie_t pointercookie = xcb_query_pointer(conn, root); 00528 00529 load_configuration(conn, override_configpath, false); 00530 if (only_check_config) { 00531 LOG("Done checking configuration file. Exiting.\n"); 00532 exit(0); 00533 } 00534 00535 if (config.ipc_socket_path == NULL) { 00536 /* Fall back to a file name in /tmp/ based on the PID */ 00537 if ((config.ipc_socket_path = getenv("I3SOCK")) == NULL) 00538 config.ipc_socket_path = get_process_filename("ipc-socket"); 00539 else 00540 config.ipc_socket_path = sstrdup(config.ipc_socket_path); 00541 } 00542 00543 uint32_t mask = XCB_CW_EVENT_MASK; 00544 uint32_t values[] = { XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT | 00545 XCB_EVENT_MASK_STRUCTURE_NOTIFY | /* when the user adds a screen (e.g. video 00546 projector), the root window gets a 00547 ConfigureNotify */ 00548 XCB_EVENT_MASK_POINTER_MOTION | 00549 XCB_EVENT_MASK_PROPERTY_CHANGE | 00550 XCB_EVENT_MASK_ENTER_WINDOW }; 00551 xcb_void_cookie_t cookie; 00552 cookie = xcb_change_window_attributes_checked(conn, root, mask, values); 00553 check_error(conn, cookie, "Another window manager seems to be running"); 00554 00555 /* By now we already checked for replies once, so let’s see if colormap 00556 * creation worked (if requested). */ 00557 if (colormap != root_screen->default_colormap) { 00558 xcb_generic_error_t *error = xcb_request_check(conn, colormap_cookie); 00559 if (error != NULL) { 00560 ELOG("Could not create ColorMap for 32 bit visual, falling back to X11 default.\n"); 00561 root_depth = root_screen->root_depth; 00562 visual_id = root_screen->root_visual; 00563 colormap = root_screen->default_colormap; 00564 DLOG("root_depth = %d, visual_id = 0x%08x.\n", root_depth, visual_id); 00565 free(error); 00566 } 00567 } 00568 00569 xcb_get_geometry_reply_t *greply = xcb_get_geometry_reply(conn, gcookie, NULL); 00570 if (greply == NULL) { 00571 ELOG("Could not get geometry of the root window, exiting\n"); 00572 return 1; 00573 } 00574 DLOG("root geometry reply: (%d, %d) %d x %d\n", greply->x, greply->y, greply->width, greply->height); 00575 00576 /* Place requests for the atoms we need as soon as possible */ 00577 #define xmacro(atom) \ 00578 xcb_intern_atom_cookie_t atom ## _cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom); 00579 #include "atoms.xmacro" 00580 #undef xmacro 00581 00582 /* Initialize the Xlib connection */ 00583 xlibdpy = xkbdpy = XOpenDisplay(NULL); 00584 00585 /* Try to load the X cursors and initialize the XKB extension */ 00586 if (xlibdpy == NULL) { 00587 ELOG("ERROR: XOpenDisplay() failed, disabling libXcursor/XKB support\n"); 00588 xcursor_supported = false; 00589 xkb_supported = false; 00590 } else if (fcntl(ConnectionNumber(xlibdpy), F_SETFD, FD_CLOEXEC) == -1) { 00591 ELOG("Could not set FD_CLOEXEC on xkbdpy\n"); 00592 return 1; 00593 } else { 00594 xcursor_load_cursors(); 00595 /*init_xkb();*/ 00596 } 00597 00598 /* Set a cursor for the root window (otherwise the root window will show no 00599 cursor until the first client is launched). */ 00600 if (xcursor_supported) 00601 xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER); 00602 else xcb_set_root_cursor(XCURSOR_CURSOR_POINTER); 00603 00604 if (xkb_supported) { 00605 int errBase, 00606 major = XkbMajorVersion, 00607 minor = XkbMinorVersion; 00608 00609 if (fcntl(ConnectionNumber(xkbdpy), F_SETFD, FD_CLOEXEC) == -1) { 00610 fprintf(stderr, "Could not set FD_CLOEXEC on xkbdpy\n"); 00611 return 1; 00612 } 00613 00614 int i1; 00615 if (!XkbQueryExtension(xkbdpy,&i1,&xkb_event_base,&errBase,&major,&minor)) { 00616 fprintf(stderr, "XKB not supported by X-server\n"); 00617 return 1; 00618 } 00619 /* end of ugliness */ 00620 00621 if (!XkbSelectEvents(xkbdpy, XkbUseCoreKbd, 00622 XkbMapNotifyMask | XkbStateNotifyMask, 00623 XkbMapNotifyMask | XkbStateNotifyMask)) { 00624 fprintf(stderr, "Could not set XKB event mask\n"); 00625 return 1; 00626 } 00627 } 00628 00629 /* Setup NetWM atoms */ 00630 #define xmacro(name) \ 00631 do { \ 00632 xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name ## _cookie, NULL); \ 00633 if (!reply) { \ 00634 ELOG("Could not get atom " #name "\n"); \ 00635 exit(-1); \ 00636 } \ 00637 A_ ## name = reply->atom; \ 00638 free(reply); \ 00639 } while (0); 00640 #include "atoms.xmacro" 00641 #undef xmacro 00642 00643 property_handlers_init(); 00644 00645 ewmh_setup_hints(); 00646 00647 keysyms = xcb_key_symbols_alloc(conn); 00648 00649 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms); 00650 00651 translate_keysyms(); 00652 grab_all_keys(conn, false); 00653 00654 bool needs_tree_init = true; 00655 if (layout_path) { 00656 LOG("Trying to restore the layout from %s...", layout_path); 00657 needs_tree_init = !tree_restore(layout_path, greply); 00658 if (delete_layout_path) 00659 unlink(layout_path); 00660 free(layout_path); 00661 } 00662 if (needs_tree_init) 00663 tree_init(greply); 00664 00665 free(greply); 00666 00667 /* Setup fake outputs for testing */ 00668 if (fake_outputs == NULL && config.fake_outputs != NULL) 00669 fake_outputs = config.fake_outputs; 00670 00671 if (fake_outputs != NULL) { 00672 fake_outputs_init(fake_outputs); 00673 FREE(fake_outputs); 00674 config.fake_outputs = NULL; 00675 } else if (force_xinerama || config.force_xinerama) { 00676 /* Force Xinerama (for drivers which don't support RandR yet, esp. the 00677 * nVidia binary graphics driver), when specified either in the config 00678 * file or on command-line */ 00679 xinerama_init(); 00680 } else { 00681 DLOG("Checking for XRandR...\n"); 00682 randr_init(&randr_base); 00683 } 00684 00685 xcb_query_pointer_reply_t *pointerreply; 00686 Output *output = NULL; 00687 if (!(pointerreply = xcb_query_pointer_reply(conn, pointercookie, NULL))) { 00688 ELOG("Could not query pointer position, using first screen\n"); 00689 output = get_first_output(); 00690 } else { 00691 DLOG("Pointer at %d, %d\n", pointerreply->root_x, pointerreply->root_y); 00692 output = get_output_containing(pointerreply->root_x, pointerreply->root_y); 00693 if (!output) { 00694 ELOG("ERROR: No screen at (%d, %d), starting on the first screen\n", 00695 pointerreply->root_x, pointerreply->root_y); 00696 output = get_first_output(); 00697 } 00698 00699 con_focus(con_descend_focused(output_get_content(output->con))); 00700 } 00701 00702 tree_render(); 00703 00704 /* Create the UNIX domain socket for IPC */ 00705 int ipc_socket = ipc_create_socket(config.ipc_socket_path); 00706 if (ipc_socket == -1) { 00707 ELOG("Could not create the IPC socket, IPC disabled\n"); 00708 } else { 00709 free(config.ipc_socket_path); 00710 struct ev_io *ipc_io = scalloc(sizeof(struct ev_io)); 00711 ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ); 00712 ev_io_start(main_loop, ipc_io); 00713 } 00714 00715 /* Also handle the UNIX domain sockets passed via socket activation. The 00716 * parameter 1 means "remove the environment variables", we don’t want to 00717 * pass these to child processes. */ 00718 listen_fds = sd_listen_fds(0); 00719 if (listen_fds < 0) 00720 ELOG("socket activation: Error in sd_listen_fds\n"); 00721 else if (listen_fds == 0) 00722 DLOG("socket activation: no sockets passed\n"); 00723 else { 00724 int flags; 00725 for (int fd = SD_LISTEN_FDS_START; 00726 fd < (SD_LISTEN_FDS_START + listen_fds); 00727 fd++) { 00728 DLOG("socket activation: also listening on fd %d\n", fd); 00729 00730 /* sd_listen_fds() enables FD_CLOEXEC by default. 00731 * However, we need to keep the file descriptors open for in-place 00732 * restarting, therefore we explicitly disable FD_CLOEXEC. */ 00733 if ((flags = fcntl(fd, F_GETFD)) < 0 || 00734 fcntl(fd, F_SETFD, flags & ~FD_CLOEXEC) < 0) { 00735 ELOG("Could not disable FD_CLOEXEC on fd %d\n", fd); 00736 } 00737 00738 struct ev_io *ipc_io = scalloc(sizeof(struct ev_io)); 00739 ev_io_init(ipc_io, ipc_new_client, fd, EV_READ); 00740 ev_io_start(main_loop, ipc_io); 00741 } 00742 } 00743 00744 /* Set up i3 specific atoms like I3_SOCKET_PATH and I3_CONFIG_PATH */ 00745 x_set_i3_atoms(); 00746 00747 struct ev_io *xcb_watcher = scalloc(sizeof(struct ev_io)); 00748 struct ev_io *xkb = scalloc(sizeof(struct ev_io)); 00749 struct ev_check *xcb_check = scalloc(sizeof(struct ev_check)); 00750 struct ev_prepare *xcb_prepare = scalloc(sizeof(struct ev_prepare)); 00751 00752 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ); 00753 ev_io_start(main_loop, xcb_watcher); 00754 00755 00756 if (xkb_supported) { 00757 ev_io_init(xkb, xkb_got_event, ConnectionNumber(xkbdpy), EV_READ); 00758 ev_io_start(main_loop, xkb); 00759 00760 /* Flush the buffer so that libev can properly get new events */ 00761 XFlush(xkbdpy); 00762 } 00763 00764 ev_check_init(xcb_check, xcb_check_cb); 00765 ev_check_start(main_loop, xcb_check); 00766 00767 ev_prepare_init(xcb_prepare, xcb_prepare_cb); 00768 ev_prepare_start(main_loop, xcb_prepare); 00769 00770 xcb_flush(conn); 00771 00772 manage_existing_windows(root); 00773 00774 struct sigaction action; 00775 00776 action.sa_sigaction = handle_signal; 00777 action.sa_flags = SA_NODEFER | SA_RESETHAND | SA_SIGINFO; 00778 sigemptyset(&action.sa_mask); 00779 00780 if (!disable_signalhandler) 00781 setup_signal_handler(); 00782 else { 00783 /* Catch all signals with default action "Core", see signal(7) */ 00784 if (sigaction(SIGQUIT, &action, NULL) == -1 || 00785 sigaction(SIGILL, &action, NULL) == -1 || 00786 sigaction(SIGABRT, &action, NULL) == -1 || 00787 sigaction(SIGFPE, &action, NULL) == -1 || 00788 sigaction(SIGSEGV, &action, NULL) == -1) 00789 ELOG("Could not setup signal handler"); 00790 } 00791 00792 /* Catch all signals with default action "Term", see signal(7) */ 00793 if (sigaction(SIGHUP, &action, NULL) == -1 || 00794 sigaction(SIGINT, &action, NULL) == -1 || 00795 sigaction(SIGALRM, &action, NULL) == -1 || 00796 sigaction(SIGUSR1, &action, NULL) == -1 || 00797 sigaction(SIGUSR2, &action, NULL) == -1) 00798 ELOG("Could not setup signal handler"); 00799 00800 /* Ignore SIGPIPE to survive errors when an IPC client disconnects 00801 * while we are sending him a message */ 00802 signal(SIGPIPE, SIG_IGN); 00803 00804 /* Autostarting exec-lines */ 00805 if (autostart) { 00806 struct Autostart *exec; 00807 TAILQ_FOREACH(exec, &autostarts, autostarts) { 00808 LOG("auto-starting %s\n", exec->command); 00809 start_application(exec->command, exec->no_startup_id); 00810 } 00811 } 00812 00813 /* Autostarting exec_always-lines */ 00814 struct Autostart *exec_always; 00815 TAILQ_FOREACH(exec_always, &autostarts_always, autostarts_always) { 00816 LOG("auto-starting (always!) %s\n", exec_always->command); 00817 start_application(exec_always->command, exec_always->no_startup_id); 00818 } 00819 00820 /* Start i3bar processes for all configured bars */ 00821 Barconfig *barconfig; 00822 TAILQ_FOREACH(barconfig, &barconfigs, configs) { 00823 char *command = NULL; 00824 sasprintf(&command, "%s --bar_id=%s --socket=\"%s\"", 00825 barconfig->i3bar_command ? barconfig->i3bar_command : "i3bar", 00826 barconfig->id, current_socketpath); 00827 LOG("Starting bar process: %s\n", command); 00828 start_application(command, true); 00829 free(command); 00830 } 00831 00832 /* Make sure to destroy the event loop to invoke the cleeanup callbacks 00833 * when calling exit() */ 00834 atexit(i3_exit); 00835 00836 ev_loop(main_loop, 0); 00837 }