2 #define I3__FILE__ "main.c"
4 * vim:ts=4:sw=4:expandtab
6 * i3 - an improved dynamic tiling window manager
7 * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
9 * main.c: Initialization, main loop
14 #include <sys/types.h>
15 #include <sys/socket.h>
18 #include <sys/resource.h>
25 #include "sd-daemon.h"
27 /* The original value of RLIMIT_CORE when i3 was started. We need to restore
28 * this before starting any other process, since we set RLIMIT_CORE to
29 * RLIM_INFINITY for i3 debugging versions. */
30 struct rlimit original_rlimit_core;
32 /** The number of file descriptors passed via socket activation. */
35 /* We keep the xcb_check watcher around to be able to enable and disable it
36 * temporarily for drag_pointer(). */
37 static struct ev_check *xcb_check;
43 xcb_connection_t *conn;
44 /* The screen (0 when you are using DISPLAY=:0) of the connection 'conn' */
47 /* Display handle for libstartup-notification */
50 /* The last timestamp we got from X11 (timestamps are included in some events
51 * and are used for some things, like determining a unique ID in startup
53 xcb_timestamp_t last_timestamp = XCB_CURRENT_TIME;
55 xcb_screen_t *root_screen;
58 /* Color depth, visual id and colormap to use when creating windows and
59 * pixmaps. Will use 32 bit depth and an appropriate visual, if available,
60 * otherwise the root window’s default (usually 24 bit TrueColor). */
62 xcb_visualid_t visual_id;
63 xcb_colormap_t colormap;
65 struct ev_loop *main_loop;
67 xcb_key_symbols_t *keysyms;
69 /* Default shmlog size if not set by user. */
70 const int default_shmlog_size = 25 * 1024 * 1024;
72 /* The list of key bindings */
73 struct bindings_head *bindings;
75 /* The list of exec-lines */
76 struct autostarts_head autostarts = TAILQ_HEAD_INITIALIZER(autostarts);
78 /* The list of exec_always lines */
79 struct autostarts_always_head autostarts_always = TAILQ_HEAD_INITIALIZER(autostarts_always);
81 /* The list of assignments */
82 struct assignments_head assignments = TAILQ_HEAD_INITIALIZER(assignments);
84 /* The list of workspace assignments (which workspace should end up on which
86 struct ws_assignments_head ws_assignments = TAILQ_HEAD_INITIALIZER(ws_assignments);
88 /* We hope that those are supported and set them to true */
89 bool xcursor_supported = true;
92 * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
93 * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
96 static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
97 /* empty, because xcb_prepare_cb and xcb_check_cb are used */
101 * Flush before blocking (and waiting for new events)
104 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
109 * Instead of polling the X connection socket we leave this to
110 * xcb_poll_for_event() which knows better than we can ever know.
113 static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
114 xcb_generic_event_t *event;
116 while ((event = xcb_poll_for_event(conn)) != NULL) {
117 if (event->response_type == 0) {
118 if (event_is_ignored(event->sequence, 0))
119 DLOG("Expected X11 Error received for sequence %x\n", event->sequence);
121 xcb_generic_error_t *error = (xcb_generic_error_t *)event;
122 DLOG("X11 Error received (probably harmless)! sequence 0x%x, error_code = %d\n",
123 error->sequence, error->error_code);
129 /* Strip off the highest bit (set if the event is generated) */
130 int type = (event->response_type & 0x7F);
132 handle_event(type, event);
139 * Enable or disable the main X11 event handling function.
140 * This is used by drag_pointer() which has its own, modal event handler, which
141 * takes precedence over the normal event handler.
144 void main_set_x11_cb(bool enable) {
145 DLOG("Setting main X11 callback to enabled=%d\n", enable);
147 ev_check_start(main_loop, xcb_check);
148 /* Trigger the watcher explicitly to handle all remaining X11 events.
149 * drag_pointer()’s event handler exits in the middle of the loop. */
150 ev_feed_event(main_loop, xcb_check, 0);
152 ev_check_stop(main_loop, xcb_check);
157 * Exit handler which destroys the main_loop. Will trigger cleanup handlers.
160 static void i3_exit(void) {
161 /* We need ev >= 4 for the following code. Since it is not *that* important (it
162 * only makes sure that there are no i3-nagbar instances left behind) we still
163 * support old systems with libev 3. */
164 #if EV_VERSION_MAJOR >= 4
165 ev_loop_destroy(main_loop);
168 if (*shmlogname != '\0') {
169 fprintf(stderr, "Closing SHM log \"%s\"\n", shmlogname);
171 shm_unlink(shmlogname);
176 * (One-shot) Handler for all signals with default action "Term", see signal(7)
178 * Unlinks the SHM log and re-raises the signal.
181 static void handle_signal(int sig, siginfo_t *info, void *data) {
182 if (*shmlogname != '\0') {
183 shm_unlink(shmlogname);
188 int main(int argc, char *argv[]) {
189 /* Keep a symbol pointing to the I3_VERSION string constant so that we have
190 * it in gdb backtraces. */
191 const char *_i3_version __attribute__((unused)) = i3_version;
192 char *override_configpath = NULL;
193 bool autostart = true;
194 char *layout_path = NULL;
195 bool delete_layout_path = false;
196 bool force_xinerama = false;
197 char *fake_outputs = NULL;
198 bool disable_signalhandler = false;
199 bool only_check_config = false;
200 static struct option long_options[] = {
201 {"no-autostart", no_argument, 0, 'a'},
202 {"config", required_argument, 0, 'c'},
203 {"version", no_argument, 0, 'v'},
204 {"moreversion", no_argument, 0, 'm'},
205 {"more-version", no_argument, 0, 'm'},
206 {"more_version", no_argument, 0, 'm'},
207 {"help", no_argument, 0, 'h'},
208 {"layout", required_argument, 0, 'L'},
209 {"restart", required_argument, 0, 0},
210 {"force-xinerama", no_argument, 0, 0},
211 {"force_xinerama", no_argument, 0, 0},
212 {"disable-signalhandler", no_argument, 0, 0},
213 {"shmlog-size", required_argument, 0, 0},
214 {"shmlog_size", required_argument, 0, 0},
215 {"get-socketpath", no_argument, 0, 0},
216 {"get_socketpath", no_argument, 0, 0},
217 {"fake_outputs", required_argument, 0, 0},
218 {"fake-outputs", required_argument, 0, 0},
219 {"force-old-config-parser-v4.4-only", no_argument, 0, 0},
221 int option_index = 0, opt;
223 setlocale(LC_ALL, "");
225 /* Get the RLIMIT_CORE limit at startup time to restore this before
226 * starting processes. */
227 getrlimit(RLIMIT_CORE, &original_rlimit_core);
229 /* Disable output buffering to make redirects in .xsession actually useful for debugging */
230 if (!isatty(fileno(stdout)))
231 setbuf(stdout, NULL);
235 /* Init logging *before* initializing debug_build to guarantee early
239 /* On release builds, disable SHM logging by default. */
240 shmlog_size = (is_debug_build() || strstr(argv[0], "i3-with-shmlog") != NULL ? default_shmlog_size : 0);
244 while ((opt = getopt_long(argc, argv, "c:CvmaL:hld:V", long_options, &option_index)) != -1) {
247 LOG("Autostart disabled using -a\n");
252 layout_path = sstrdup(optarg);
253 delete_layout_path = false;
256 FREE(override_configpath);
257 override_configpath = sstrdup(optarg);
260 LOG("Checking configuration file only (-C)\n");
261 only_check_config = true;
264 printf("i3 version %s © 2009 Michael Stapelberg and contributors\n", i3_version);
268 printf("Binary i3 version: %s © 2009 Michael Stapelberg and contributors\n", i3_version);
269 display_running_version();
276 LOG("Enabling debug logging\n");
277 set_debug_logging(true);
280 /* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */
283 if (strcmp(long_options[option_index].name, "force-xinerama") == 0 ||
284 strcmp(long_options[option_index].name, "force_xinerama") == 0) {
285 force_xinerama = true;
286 ELOG("Using Xinerama instead of RandR. This option should be "
287 "avoided at all cost because it does not refresh the list "
288 "of screens, so you cannot configure displays at runtime. "
289 "Please check if your driver really does not support RandR "
290 "and disable this option as soon as you can.\n");
292 } else if (strcmp(long_options[option_index].name, "disable-signalhandler") == 0) {
293 disable_signalhandler = true;
295 } else if (strcmp(long_options[option_index].name, "get-socketpath") == 0 ||
296 strcmp(long_options[option_index].name, "get_socketpath") == 0) {
297 char *socket_path = root_atom_contents("I3_SOCKET_PATH", NULL, 0);
299 printf("%s\n", socket_path);
304 } else if (strcmp(long_options[option_index].name, "shmlog-size") == 0 ||
305 strcmp(long_options[option_index].name, "shmlog_size") == 0) {
306 shmlog_size = atoi(optarg);
307 /* Re-initialize logging immediately to get as many
308 * logmessages as possible into the SHM log. */
310 LOG("Limiting SHM log size to %d bytes\n", shmlog_size);
312 } else if (strcmp(long_options[option_index].name, "restart") == 0) {
314 layout_path = sstrdup(optarg);
315 delete_layout_path = true;
317 } else if (strcmp(long_options[option_index].name, "fake-outputs") == 0 ||
318 strcmp(long_options[option_index].name, "fake_outputs") == 0) {
319 LOG("Initializing fake outputs: %s\n", optarg);
320 fake_outputs = sstrdup(optarg);
322 } else if (strcmp(long_options[option_index].name, "force-old-config-parser-v4.4-only") == 0) {
323 ELOG("You are passing --force-old-config-parser-v4.4-only, but that flag was removed by now.\n");
328 fprintf(stderr, "Usage: %s [-c configfile] [-d all] [-a] [-v] [-V] [-C]\n", argv[0]);
329 fprintf(stderr, "\n");
330 fprintf(stderr, "\t-a disable autostart ('exec' lines in config)\n");
331 fprintf(stderr, "\t-c <file> use the provided configfile instead\n");
332 fprintf(stderr, "\t-C validate configuration file and exit\n");
333 fprintf(stderr, "\t-d all enable debug output\n");
334 fprintf(stderr, "\t-L <file> path to the serialized layout during restarts\n");
335 fprintf(stderr, "\t-v display version and exit\n");
336 fprintf(stderr, "\t-V enable verbose mode\n");
337 fprintf(stderr, "\n");
338 fprintf(stderr, "\t--force-xinerama\n"
339 "\tUse Xinerama instead of RandR.\n"
340 "\tThis option should only be used if you are stuck with the\n"
341 "\told nVidia closed source driver (older than 302.17), which does\n"
342 "\tnot support RandR.\n");
343 fprintf(stderr, "\n");
344 fprintf(stderr, "\t--get-socketpath\n"
345 "\tRetrieve the i3 IPC socket path from X11, print it, then exit.\n");
346 fprintf(stderr, "\n");
347 fprintf(stderr, "\t--shmlog-size <limit>\n"
348 "\tLimits the size of the i3 SHM log to <limit> bytes. Setting this\n"
349 "\tto 0 disables SHM logging entirely.\n"
350 "\tThe default is %d bytes.\n",
352 fprintf(stderr, "\n");
353 fprintf(stderr, "If you pass plain text arguments, i3 will interpret them as a command\n"
354 "to send to a currently running i3 (like i3-msg). This allows you to\n"
355 "use nice and logical commands, such as:\n"
358 "\ti3 floating toggle\n"
365 if (only_check_config) {
366 exit(parse_configuration(override_configpath, false) ? 0 : 1);
369 /* If the user passes more arguments, we act like i3-msg would: Just send
370 * the arguments as an IPC message to i3. This allows for nice semantic
371 * commands such as 'i3 border none'. */
373 /* We enable verbose mode so that the user knows what’s going on.
374 * This should make it easier to find mistakes when the user passes
375 * arguments by mistake. */
378 LOG("Additional arguments passed. Sending them as a command to i3.\n");
379 char *payload = NULL;
380 while (optind < argc) {
382 payload = sstrdup(argv[optind]);
385 sasprintf(&both, "%s %s", payload, argv[optind]);
391 DLOG("Command is: %s (%zd bytes)\n", payload, strlen(payload));
392 char *socket_path = root_atom_contents("I3_SOCKET_PATH", NULL, 0);
394 ELOG("Could not get i3 IPC socket path\n");
398 int sockfd = socket(AF_LOCAL, SOCK_STREAM, 0);
400 err(EXIT_FAILURE, "Could not create socket");
402 struct sockaddr_un addr;
403 memset(&addr, 0, sizeof(struct sockaddr_un));
404 addr.sun_family = AF_LOCAL;
405 strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
406 if (connect(sockfd, (const struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0)
407 err(EXIT_FAILURE, "Could not connect to i3");
409 if (ipc_send_message(sockfd, strlen(payload), I3_IPC_MESSAGE_TYPE_COMMAND,
410 (uint8_t *)payload) == -1)
411 err(EXIT_FAILURE, "IPC: write()");
413 uint32_t reply_length;
417 if ((ret = ipc_recv_message(sockfd, &reply_type, &reply_length, &reply)) != 0) {
419 err(EXIT_FAILURE, "IPC: read()");
422 if (reply_type != I3_IPC_MESSAGE_TYPE_COMMAND)
423 errx(EXIT_FAILURE, "IPC: received reply of type %d but expected %d (COMMAND)", reply_type, I3_IPC_MESSAGE_TYPE_COMMAND);
424 printf("%.*s\n", reply_length, reply);
428 /* Enable logging to handle the case when the user did not specify --shmlog-size */
431 /* Try to enable core dumps by default when running a debug build */
432 if (is_debug_build()) {
433 struct rlimit limit = {RLIM_INFINITY, RLIM_INFINITY};
434 setrlimit(RLIMIT_CORE, &limit);
436 /* The following code is helpful, but not required. We thus don’t pay
437 * much attention to error handling, non-linux or other edge cases. */
438 LOG("CORE DUMPS: You are running a development version of i3, so coredumps were automatically enabled (ulimit -c unlimited).\n");
439 size_t cwd_size = 1024;
440 char *cwd = smalloc(cwd_size);
442 while ((cwd_ret = getcwd(cwd, cwd_size)) == NULL && errno == ERANGE) {
443 cwd_size = cwd_size * 2;
444 cwd = srealloc(cwd, cwd_size);
447 LOG("CORE DUMPS: Your current working directory is \"%s\".\n", cwd);
449 if ((patternfd = open("/proc/sys/kernel/core_pattern", O_RDONLY)) >= 0) {
450 memset(cwd, '\0', cwd_size);
451 if (read(patternfd, cwd, cwd_size) > 0)
452 /* a trailing newline is included in cwd */
453 LOG("CORE DUMPS: Your core_pattern is: %s", cwd);
459 LOG("i3 %s starting\n", i3_version);
461 conn = xcb_connect(NULL, &conn_screen);
462 if (xcb_connection_has_error(conn))
463 errx(EXIT_FAILURE, "Cannot open display\n");
465 sndisplay = sn_xcb_display_new(conn, NULL, NULL);
467 /* Initialize the libev event loop. This needs to be done before loading
468 * the config file because the parser will install an ev_child watcher
469 * for the nagbar when config errors are found. */
470 main_loop = EV_DEFAULT;
471 if (main_loop == NULL)
472 die("Could not initialize libev. Bad LIBEV_FLAGS?\n");
474 root_screen = xcb_aux_get_screen(conn, conn_screen);
475 root = root_screen->root;
477 /* Place requests for the atoms we need as soon as possible */
478 #define xmacro(atom) \
479 xcb_intern_atom_cookie_t atom##_cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
480 #include "atoms.xmacro"
483 /* By default, we use the same depth and visual as the root window, which
484 * usually is TrueColor (24 bit depth) and the corresponding visual.
485 * However, we also check if a 32 bit depth and visual are available (for
486 * transparency) and use it if so. */
487 root_depth = root_screen->root_depth;
488 visual_id = root_screen->root_visual;
489 colormap = root_screen->default_colormap;
491 DLOG("root_depth = %d, visual_id = 0x%08x.\n", root_depth, visual_id);
492 DLOG("root_screen->height_in_pixels = %d, root_screen->height_in_millimeters = %d, dpi = %d\n",
493 root_screen->height_in_pixels, root_screen->height_in_millimeters,
494 (int)((double)root_screen->height_in_pixels * 25.4 / (double)root_screen->height_in_millimeters));
495 DLOG("One logical pixel corresponds to %d physical pixels on this display.\n", logical_px(1));
497 xcb_get_geometry_cookie_t gcookie = xcb_get_geometry(conn, root);
498 xcb_query_pointer_cookie_t pointercookie = xcb_query_pointer(conn, root);
500 /* Setup NetWM atoms */
501 #define xmacro(name) \
503 xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name##_cookie, NULL); \
505 ELOG("Could not get atom " #name "\n"); \
508 A_##name = reply->atom; \
511 #include "atoms.xmacro"
514 load_configuration(conn, override_configpath, false);
516 if (config.ipc_socket_path == NULL) {
517 /* Fall back to a file name in /tmp/ based on the PID */
518 if ((config.ipc_socket_path = getenv("I3SOCK")) == NULL)
519 config.ipc_socket_path = get_process_filename("ipc-socket");
521 config.ipc_socket_path = sstrdup(config.ipc_socket_path);
524 xcb_void_cookie_t cookie;
525 cookie = xcb_change_window_attributes_checked(conn, root, XCB_CW_EVENT_MASK, (uint32_t[]){ROOT_EVENT_MASK});
526 check_error(conn, cookie, "Another window manager seems to be running");
528 xcb_get_geometry_reply_t *greply = xcb_get_geometry_reply(conn, gcookie, NULL);
529 if (greply == NULL) {
530 ELOG("Could not get geometry of the root window, exiting\n");
533 DLOG("root geometry reply: (%d, %d) %d x %d\n", greply->x, greply->y, greply->width, greply->height);
535 xcursor_load_cursors();
537 /* Set a cursor for the root window (otherwise the root window will show no
538 cursor until the first client is launched). */
539 if (xcursor_supported)
540 xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER);
542 xcb_set_root_cursor(XCURSOR_CURSOR_POINTER);
544 const xcb_query_extension_reply_t *extreply;
545 extreply = xcb_get_extension_data(conn, &xcb_xkb_id);
546 if (!extreply->present) {
547 DLOG("xkb is not present on this server\n");
549 DLOG("initializing xcb-xkb\n");
550 xcb_xkb_use_extension(conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
551 xcb_xkb_select_events(conn,
552 XCB_XKB_ID_USE_CORE_KBD,
553 XCB_XKB_EVENT_TYPE_STATE_NOTIFY | XCB_XKB_EVENT_TYPE_MAP_NOTIFY | XCB_XKB_EVENT_TYPE_NEW_KEYBOARD_NOTIFY,
555 XCB_XKB_EVENT_TYPE_STATE_NOTIFY | XCB_XKB_EVENT_TYPE_MAP_NOTIFY | XCB_XKB_EVENT_TYPE_NEW_KEYBOARD_NOTIFY,
559 xkb_base = extreply->first_event;
564 property_handlers_init();
568 keysyms = xcb_key_symbols_alloc(conn);
570 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
573 grab_all_keys(conn, false);
575 bool needs_tree_init = true;
577 LOG("Trying to restore the layout from %s...", layout_path);
578 needs_tree_init = !tree_restore(layout_path, greply);
579 if (delete_layout_path) {
581 const char *dir = dirname(layout_path);
582 /* possibly fails with ENOTEMPTY if there are files (or
593 /* Setup fake outputs for testing */
594 if (fake_outputs == NULL && config.fake_outputs != NULL)
595 fake_outputs = config.fake_outputs;
597 if (fake_outputs != NULL) {
598 fake_outputs_init(fake_outputs);
600 config.fake_outputs = NULL;
601 } else if (force_xinerama || config.force_xinerama) {
602 /* Force Xinerama (for drivers which don't support RandR yet, esp. the
603 * nVidia binary graphics driver), when specified either in the config
604 * file or on command-line */
607 DLOG("Checking for XRandR...\n");
608 randr_init(&randr_base);
611 scratchpad_fix_resolution();
613 xcb_query_pointer_reply_t *pointerreply;
614 Output *output = NULL;
615 if (!(pointerreply = xcb_query_pointer_reply(conn, pointercookie, NULL))) {
616 ELOG("Could not query pointer position, using first screen\n");
618 DLOG("Pointer at %d, %d\n", pointerreply->root_x, pointerreply->root_y);
619 output = get_output_containing(pointerreply->root_x, pointerreply->root_y);
621 ELOG("ERROR: No screen at (%d, %d), starting on the first screen\n",
622 pointerreply->root_x, pointerreply->root_y);
623 output = get_first_output();
626 con_focus(con_descend_focused(output_get_content(output->con)));
631 /* Create the UNIX domain socket for IPC */
632 int ipc_socket = ipc_create_socket(config.ipc_socket_path);
633 if (ipc_socket == -1) {
634 ELOG("Could not create the IPC socket, IPC disabled\n");
636 struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
637 ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ);
638 ev_io_start(main_loop, ipc_io);
641 /* Also handle the UNIX domain sockets passed via socket activation. The
642 * parameter 1 means "remove the environment variables", we don’t want to
643 * pass these to child processes. */
644 listen_fds = sd_listen_fds(0);
646 ELOG("socket activation: Error in sd_listen_fds\n");
647 else if (listen_fds == 0)
648 DLOG("socket activation: no sockets passed\n");
651 for (int fd = SD_LISTEN_FDS_START;
652 fd < (SD_LISTEN_FDS_START + listen_fds);
654 DLOG("socket activation: also listening on fd %d\n", fd);
656 /* sd_listen_fds() enables FD_CLOEXEC by default.
657 * However, we need to keep the file descriptors open for in-place
658 * restarting, therefore we explicitly disable FD_CLOEXEC. */
659 if ((flags = fcntl(fd, F_GETFD)) < 0 ||
660 fcntl(fd, F_SETFD, flags & ~FD_CLOEXEC) < 0) {
661 ELOG("Could not disable FD_CLOEXEC on fd %d\n", fd);
664 struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
665 ev_io_init(ipc_io, ipc_new_client, fd, EV_READ);
666 ev_io_start(main_loop, ipc_io);
670 /* Set up i3 specific atoms like I3_SOCKET_PATH and I3_CONFIG_PATH */
672 ewmh_update_workarea();
674 /* Set the ewmh desktop properties. */
675 ewmh_update_current_desktop();
676 ewmh_update_number_of_desktops();
677 ewmh_update_desktop_names();
678 ewmh_update_desktop_viewport();
680 struct ev_io *xcb_watcher = scalloc(sizeof(struct ev_io));
681 xcb_check = scalloc(sizeof(struct ev_check));
682 struct ev_prepare *xcb_prepare = scalloc(sizeof(struct ev_prepare));
684 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
685 ev_io_start(main_loop, xcb_watcher);
687 ev_check_init(xcb_check, xcb_check_cb);
688 ev_check_start(main_loop, xcb_check);
690 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
691 ev_prepare_start(main_loop, xcb_prepare);
695 /* What follows is a fugly consequence of X11 protocol race conditions like
696 * the following: In an i3 in-place restart, i3 will reparent all windows
697 * to the root window, then exec() itself. In the new process, it calls
698 * manage_existing_windows. However, in case any application sent a
699 * generated UnmapNotify message to the WM (as GIMP does), this message
700 * will be handled by i3 *after* managing the window, thus i3 thinks the
701 * window just closed itself. In reality, the message was sent in the time
702 * period where i3 wasn’t running yet.
704 * To prevent this, we grab the server (disables processing of any other
705 * connections), then discard all pending events (since we didn’t do
706 * anything, there cannot be any meaningful responses), then ungrab the
708 xcb_grab_server(conn);
711 xcb_generic_event_t *event;
712 while ((event = xcb_poll_for_event(conn)) != NULL) {
713 if (event->response_type == 0) {
718 /* Strip off the highest bit (set if the event is generated) */
719 int type = (event->response_type & 0x7F);
721 /* We still need to handle MapRequests which are sent in the
722 * timespan starting from when we register as a window manager and
723 * this piece of code which drops events. */
724 if (type == XCB_MAP_REQUEST)
725 handle_event(type, event);
729 manage_existing_windows(root);
731 xcb_ungrab_server(conn);
734 LOG("This is not an in-place restart, copying root window contents to a pixmap\n");
735 xcb_screen_t *root = xcb_aux_get_screen(conn, conn_screen);
736 uint16_t width = root->width_in_pixels;
737 uint16_t height = root->height_in_pixels;
738 xcb_pixmap_t pixmap = xcb_generate_id(conn);
739 xcb_gcontext_t gc = xcb_generate_id(conn);
741 xcb_create_pixmap(conn, root->root_depth, pixmap, root->root, width, height);
743 xcb_create_gc(conn, gc, root->root,
744 XCB_GC_FUNCTION | XCB_GC_PLANE_MASK | XCB_GC_FILL_STYLE | XCB_GC_SUBWINDOW_MODE,
745 (uint32_t[]){XCB_GX_COPY, ~0, XCB_FILL_STYLE_SOLID, XCB_SUBWINDOW_MODE_INCLUDE_INFERIORS});
747 xcb_copy_area(conn, root->root, pixmap, gc, 0, 0, 0, 0, width, height);
748 xcb_change_window_attributes_checked(conn, root->root, XCB_CW_BACK_PIXMAP, (uint32_t[]){pixmap});
750 xcb_free_gc(conn, gc);
751 xcb_free_pixmap(conn, pixmap);
754 struct sigaction action;
756 action.sa_sigaction = handle_signal;
757 action.sa_flags = SA_NODEFER | SA_RESETHAND | SA_SIGINFO;
758 sigemptyset(&action.sa_mask);
760 if (!disable_signalhandler)
761 setup_signal_handler();
763 /* Catch all signals with default action "Core", see signal(7) */
764 if (sigaction(SIGQUIT, &action, NULL) == -1 ||
765 sigaction(SIGILL, &action, NULL) == -1 ||
766 sigaction(SIGABRT, &action, NULL) == -1 ||
767 sigaction(SIGFPE, &action, NULL) == -1 ||
768 sigaction(SIGSEGV, &action, NULL) == -1)
769 ELOG("Could not setup signal handler");
772 /* Catch all signals with default action "Term", see signal(7) */
773 if (sigaction(SIGHUP, &action, NULL) == -1 ||
774 sigaction(SIGINT, &action, NULL) == -1 ||
775 sigaction(SIGALRM, &action, NULL) == -1 ||
776 sigaction(SIGUSR1, &action, NULL) == -1 ||
777 sigaction(SIGUSR2, &action, NULL) == -1)
778 ELOG("Could not setup signal handler");
780 /* Ignore SIGPIPE to survive errors when an IPC client disconnects
781 * while we are sending them a message */
782 signal(SIGPIPE, SIG_IGN);
784 /* Autostarting exec-lines */
786 struct Autostart *exec;
787 TAILQ_FOREACH(exec, &autostarts, autostarts) {
788 LOG("auto-starting %s\n", exec->command);
789 start_application(exec->command, exec->no_startup_id);
793 /* Autostarting exec_always-lines */
794 struct Autostart *exec_always;
795 TAILQ_FOREACH(exec_always, &autostarts_always, autostarts_always) {
796 LOG("auto-starting (always!) %s\n", exec_always->command);
797 start_application(exec_always->command, exec_always->no_startup_id);
800 /* Start i3bar processes for all configured bars */
801 Barconfig *barconfig;
802 TAILQ_FOREACH(barconfig, &barconfigs, configs) {
803 char *command = NULL;
804 sasprintf(&command, "%s --bar_id=%s --socket=\"%s\"",
805 barconfig->i3bar_command ? barconfig->i3bar_command : "i3bar",
806 barconfig->id, current_socketpath);
807 LOG("Starting bar process: %s\n", command);
808 start_application(command, true);
812 /* Make sure to destroy the event loop to invoke the cleeanup callbacks
813 * when calling exit() */
816 ev_loop(main_loop, 0);