2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
7 * main.c: Initialization, main loop
14 #include <sys/types.h>
15 #include <sys/socket.h>
18 #include <sys/resource.h>
24 #include "sd-daemon.h"
26 /* The original value of RLIMIT_CORE when i3 was started. We need to restore
27 * this before starting any other process, since we set RLIMIT_CORE to
28 * RLIM_INFINITY for i3 debugging versions. */
29 struct rlimit original_rlimit_core;
31 /** The number of file descriptors passed via socket activation. */
34 /* We keep the xcb_check watcher around to be able to enable and disable it
35 * temporarily for drag_pointer(). */
36 static struct ev_check *xcb_check;
42 xcb_connection_t *conn;
43 /* The screen (0 when you are using DISPLAY=:0) of the connection 'conn' */
46 /* Display handle for libstartup-notification */
49 /* The last timestamp we got from X11 (timestamps are included in some events
50 * and are used for some things, like determining a unique ID in startup
52 xcb_timestamp_t last_timestamp = XCB_CURRENT_TIME;
54 xcb_screen_t *root_screen;
57 /* Color depth, visual id and colormap to use when creating windows and
58 * pixmaps. Will use 32 bit depth and an appropriate visual, if available,
59 * otherwise the root window’s default (usually 24 bit TrueColor). */
61 xcb_visualtype_t *visual_type;
62 xcb_colormap_t colormap;
64 struct ev_loop *main_loop;
66 xcb_key_symbols_t *keysyms;
68 /* Default shmlog size if not set by user. */
69 const int default_shmlog_size = 25 * 1024 * 1024;
71 /* The list of key bindings */
72 struct bindings_head *bindings;
74 /* The list of exec-lines */
75 struct autostarts_head autostarts = TAILQ_HEAD_INITIALIZER(autostarts);
77 /* The list of exec_always lines */
78 struct autostarts_always_head autostarts_always = TAILQ_HEAD_INITIALIZER(autostarts_always);
80 /* The list of assignments */
81 struct assignments_head assignments = TAILQ_HEAD_INITIALIZER(assignments);
83 /* The list of workspace assignments (which workspace should end up on which
85 struct ws_assignments_head ws_assignments = TAILQ_HEAD_INITIALIZER(ws_assignments);
87 /* We hope that those are supported and set them to true */
88 bool xcursor_supported = true;
89 bool xkb_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 static const char *_i3_version __attribute__((used)) = 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 root_depth = root_screen->root_depth;
484 colormap = root_screen->default_colormap;
485 visual_type = xcb_aux_find_visual_by_attrs(root_screen, -1, 32);
486 if (visual_type != NULL) {
487 root_depth = xcb_aux_get_depth_of_visual(root_screen, visual_type->visual_id);
488 colormap = xcb_generate_id(conn);
490 xcb_void_cookie_t cm_cookie = xcb_create_colormap_checked(conn,
491 XCB_COLORMAP_ALLOC_NONE,
494 visual_type->visual_id);
496 xcb_generic_error_t *error = xcb_request_check(conn, cm_cookie);
498 ELOG("Could not create colormap. Error code: %d\n", error->error_code);
502 visual_type = get_visualtype(root_screen);
507 DLOG("root_depth = %d, visual_id = 0x%08x.\n", root_depth, visual_type->visual_id);
508 DLOG("root_screen->height_in_pixels = %d, root_screen->height_in_millimeters = %d\n",
509 root_screen->height_in_pixels, root_screen->height_in_millimeters);
510 DLOG("One logical pixel corresponds to %d physical pixels on this display.\n", logical_px(1));
512 xcb_get_geometry_cookie_t gcookie = xcb_get_geometry(conn, root);
513 xcb_query_pointer_cookie_t pointercookie = xcb_query_pointer(conn, root);
515 /* Setup NetWM atoms */
516 #define xmacro(name) \
518 xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name##_cookie, NULL); \
520 ELOG("Could not get atom " #name "\n"); \
523 A_##name = reply->atom; \
526 #include "atoms.xmacro"
529 load_configuration(conn, override_configpath, false);
531 if (config.ipc_socket_path == NULL) {
532 /* Fall back to a file name in /tmp/ based on the PID */
533 if ((config.ipc_socket_path = getenv("I3SOCK")) == NULL)
534 config.ipc_socket_path = get_process_filename("ipc-socket");
536 config.ipc_socket_path = sstrdup(config.ipc_socket_path);
539 xcb_void_cookie_t cookie;
540 cookie = xcb_change_window_attributes_checked(conn, root, XCB_CW_EVENT_MASK, (uint32_t[]){ROOT_EVENT_MASK});
541 xcb_generic_error_t *error = xcb_request_check(conn, cookie);
543 ELOG("Another window manager seems to be running (X error %d)\n", error->error_code);
547 xcb_get_geometry_reply_t *greply = xcb_get_geometry_reply(conn, gcookie, NULL);
548 if (greply == NULL) {
549 ELOG("Could not get geometry of the root window, exiting\n");
552 DLOG("root geometry reply: (%d, %d) %d x %d\n", greply->x, greply->y, greply->width, greply->height);
554 xcursor_load_cursors();
556 /* Set a cursor for the root window (otherwise the root window will show no
557 cursor until the first client is launched). */
558 if (xcursor_supported)
559 xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER);
561 xcb_set_root_cursor(XCURSOR_CURSOR_POINTER);
563 const xcb_query_extension_reply_t *extreply;
564 extreply = xcb_get_extension_data(conn, &xcb_xkb_id);
565 xkb_supported = extreply->present;
566 if (!extreply->present) {
567 DLOG("xkb is not present on this server\n");
569 DLOG("initializing xcb-xkb\n");
570 xcb_xkb_use_extension(conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
571 xcb_xkb_select_events(conn,
572 XCB_XKB_ID_USE_CORE_KBD,
573 XCB_XKB_EVENT_TYPE_STATE_NOTIFY | XCB_XKB_EVENT_TYPE_MAP_NOTIFY | XCB_XKB_EVENT_TYPE_NEW_KEYBOARD_NOTIFY,
575 XCB_XKB_EVENT_TYPE_STATE_NOTIFY | XCB_XKB_EVENT_TYPE_MAP_NOTIFY | XCB_XKB_EVENT_TYPE_NEW_KEYBOARD_NOTIFY,
580 /* Setting both, XCB_XKB_PER_CLIENT_FLAG_GRABS_USE_XKB_STATE and
581 * XCB_XKB_PER_CLIENT_FLAG_LOOKUP_STATE_WHEN_GRABBED, will lead to the
582 * X server sending us the full XKB state in KeyPress and KeyRelease:
583 * https://sources.debian.net/src/xorg-server/2:1.17.2-1.1/xkb/xkbEvents.c/?hl=927#L927
585 xcb_xkb_per_client_flags_reply_t *pcf_reply;
586 /* The last three parameters are unset because they are only relevant
587 * when using a feature called “automatic reset of boolean controls”:
588 * http://www.x.org/releases/X11R7.7/doc/kbproto/xkbproto.html#Automatic_Reset_of_Boolean_Controls
590 pcf_reply = xcb_xkb_per_client_flags_reply(
592 xcb_xkb_per_client_flags(
594 XCB_XKB_ID_USE_CORE_KBD,
595 XCB_XKB_PER_CLIENT_FLAG_GRABS_USE_XKB_STATE | XCB_XKB_PER_CLIENT_FLAG_LOOKUP_STATE_WHEN_GRABBED,
596 XCB_XKB_PER_CLIENT_FLAG_GRABS_USE_XKB_STATE | XCB_XKB_PER_CLIENT_FLAG_LOOKUP_STATE_WHEN_GRABBED,
597 0 /* uint32_t ctrlsToChange */,
598 0 /* uint32_t autoCtrls */,
599 0 /* uint32_t autoCtrlsValues */),
601 if (pcf_reply == NULL ||
602 !(pcf_reply->value & XCB_XKB_PER_CLIENT_FLAG_GRABS_USE_XKB_STATE)) {
603 ELOG("Could not set XCB_XKB_PER_CLIENT_FLAG_GRABS_USE_XKB_STATE\n");
605 if (pcf_reply == NULL ||
606 !(pcf_reply->value & XCB_XKB_PER_CLIENT_FLAG_LOOKUP_STATE_WHEN_GRABBED)) {
607 ELOG("Could not set XCB_XKB_PER_CLIENT_FLAG_LOOKUP_STATE_WHEN_GRABBED\n");
610 xkb_base = extreply->first_event;
615 property_handlers_init();
619 keysyms = xcb_key_symbols_alloc(conn);
621 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
624 die("Could not load keymap\n");
629 bool needs_tree_init = true;
630 if (layout_path != NULL) {
631 LOG("Trying to restore the layout from \"%s\".\n", layout_path);
632 needs_tree_init = !tree_restore(layout_path, greply);
633 if (delete_layout_path) {
635 const char *dir = dirname(layout_path);
636 /* possibly fails with ENOTEMPTY if there are files (or
646 /* Setup fake outputs for testing */
647 if (fake_outputs == NULL && config.fake_outputs != NULL)
648 fake_outputs = config.fake_outputs;
650 if (fake_outputs != NULL) {
651 fake_outputs_init(fake_outputs);
653 config.fake_outputs = NULL;
654 } else if (force_xinerama || config.force_xinerama) {
655 /* Force Xinerama (for drivers which don't support RandR yet, esp. the
656 * nVidia binary graphics driver), when specified either in the config
657 * file or on command-line */
660 DLOG("Checking for XRandR...\n");
661 randr_init(&randr_base);
664 /* We need to force disabling outputs which have been loaded from the
665 * layout file but are no longer active. This can happen if the output has
666 * been disabled in the short time between writing the restart layout file
667 * and restarting i3. See #2326. */
668 if (layout_path != NULL && randr_base > -1) {
670 TAILQ_FOREACH(con, &(croot->nodes_head), nodes) {
672 TAILQ_FOREACH(output, &outputs, outputs) {
673 if (output->active || strcmp(con->name, output->name) != 0)
676 /* This will correctly correlate the output with its content
677 * container. We need to make the connection to properly
678 * disable the output. */
679 if (output->con == NULL) {
680 output_init_con(output);
681 output->changed = false;
684 output->to_be_disabled = true;
685 randr_disable_output(output);
691 scratchpad_fix_resolution();
693 xcb_query_pointer_reply_t *pointerreply;
694 Output *output = NULL;
695 if (!(pointerreply = xcb_query_pointer_reply(conn, pointercookie, NULL))) {
696 ELOG("Could not query pointer position, using first screen\n");
698 DLOG("Pointer at %d, %d\n", pointerreply->root_x, pointerreply->root_y);
699 output = get_output_containing(pointerreply->root_x, pointerreply->root_y);
701 ELOG("ERROR: No screen at (%d, %d), starting on the first screen\n",
702 pointerreply->root_x, pointerreply->root_y);
703 output = get_first_output();
706 con_focus(con_descend_focused(output_get_content(output->con)));
712 /* Create the UNIX domain socket for IPC */
713 int ipc_socket = ipc_create_socket(config.ipc_socket_path);
714 if (ipc_socket == -1) {
715 ELOG("Could not create the IPC socket, IPC disabled\n");
717 struct ev_io *ipc_io = scalloc(1, sizeof(struct ev_io));
718 ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ);
719 ev_io_start(main_loop, ipc_io);
722 /* Also handle the UNIX domain sockets passed via socket activation. The
723 * parameter 1 means "remove the environment variables", we don’t want to
724 * pass these to child processes. */
725 listen_fds = sd_listen_fds(0);
727 ELOG("socket activation: Error in sd_listen_fds\n");
728 else if (listen_fds == 0)
729 DLOG("socket activation: no sockets passed\n");
732 for (int fd = SD_LISTEN_FDS_START;
733 fd < (SD_LISTEN_FDS_START + listen_fds);
735 DLOG("socket activation: also listening on fd %d\n", fd);
737 /* sd_listen_fds() enables FD_CLOEXEC by default.
738 * However, we need to keep the file descriptors open for in-place
739 * restarting, therefore we explicitly disable FD_CLOEXEC. */
740 if ((flags = fcntl(fd, F_GETFD)) < 0 ||
741 fcntl(fd, F_SETFD, flags & ~FD_CLOEXEC) < 0) {
742 ELOG("Could not disable FD_CLOEXEC on fd %d\n", fd);
745 struct ev_io *ipc_io = scalloc(1, sizeof(struct ev_io));
746 ev_io_init(ipc_io, ipc_new_client, fd, EV_READ);
747 ev_io_start(main_loop, ipc_io);
751 /* Set up i3 specific atoms like I3_SOCKET_PATH and I3_CONFIG_PATH */
753 ewmh_update_workarea();
755 /* Set the ewmh desktop properties. */
756 ewmh_update_current_desktop();
757 ewmh_update_number_of_desktops();
758 ewmh_update_desktop_names();
759 ewmh_update_desktop_viewport();
761 struct ev_io *xcb_watcher = scalloc(1, sizeof(struct ev_io));
762 xcb_check = scalloc(1, sizeof(struct ev_check));
763 struct ev_prepare *xcb_prepare = scalloc(1, sizeof(struct ev_prepare));
765 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
766 ev_io_start(main_loop, xcb_watcher);
768 ev_check_init(xcb_check, xcb_check_cb);
769 ev_check_start(main_loop, xcb_check);
771 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
772 ev_prepare_start(main_loop, xcb_prepare);
776 /* What follows is a fugly consequence of X11 protocol race conditions like
777 * the following: In an i3 in-place restart, i3 will reparent all windows
778 * to the root window, then exec() itself. In the new process, it calls
779 * manage_existing_windows. However, in case any application sent a
780 * generated UnmapNotify message to the WM (as GIMP does), this message
781 * will be handled by i3 *after* managing the window, thus i3 thinks the
782 * window just closed itself. In reality, the message was sent in the time
783 * period where i3 wasn’t running yet.
785 * To prevent this, we grab the server (disables processing of any other
786 * connections), then discard all pending events (since we didn’t do
787 * anything, there cannot be any meaningful responses), then ungrab the
789 xcb_grab_server(conn);
792 xcb_generic_event_t *event;
793 while ((event = xcb_poll_for_event(conn)) != NULL) {
794 if (event->response_type == 0) {
799 /* Strip off the highest bit (set if the event is generated) */
800 int type = (event->response_type & 0x7F);
802 /* We still need to handle MapRequests which are sent in the
803 * timespan starting from when we register as a window manager and
804 * this piece of code which drops events. */
805 if (type == XCB_MAP_REQUEST)
806 handle_event(type, event);
810 manage_existing_windows(root);
812 xcb_ungrab_server(conn);
815 LOG("This is not an in-place restart, copying root window contents to a pixmap\n");
816 xcb_screen_t *root = xcb_aux_get_screen(conn, conn_screen);
817 uint16_t width = root->width_in_pixels;
818 uint16_t height = root->height_in_pixels;
819 xcb_pixmap_t pixmap = xcb_generate_id(conn);
820 xcb_gcontext_t gc = xcb_generate_id(conn);
822 xcb_create_pixmap(conn, root->root_depth, pixmap, root->root, width, height);
824 xcb_create_gc(conn, gc, root->root,
825 XCB_GC_FUNCTION | XCB_GC_PLANE_MASK | XCB_GC_FILL_STYLE | XCB_GC_SUBWINDOW_MODE,
826 (uint32_t[]){XCB_GX_COPY, ~0, XCB_FILL_STYLE_SOLID, XCB_SUBWINDOW_MODE_INCLUDE_INFERIORS});
828 xcb_copy_area(conn, root->root, pixmap, gc, 0, 0, 0, 0, width, height);
829 xcb_change_window_attributes(conn, root->root, XCB_CW_BACK_PIXMAP, (uint32_t[]){pixmap});
831 xcb_free_gc(conn, gc);
832 xcb_free_pixmap(conn, pixmap);
835 #if defined(__OpenBSD__)
836 if (pledge("stdio rpath wpath cpath proc exec unix", NULL) == -1)
837 err(EXIT_FAILURE, "pledge");
840 struct sigaction action;
842 action.sa_sigaction = handle_signal;
843 action.sa_flags = SA_NODEFER | SA_RESETHAND | SA_SIGINFO;
844 sigemptyset(&action.sa_mask);
846 if (!disable_signalhandler)
847 setup_signal_handler();
849 /* Catch all signals with default action "Core", see signal(7) */
850 if (sigaction(SIGQUIT, &action, NULL) == -1 ||
851 sigaction(SIGILL, &action, NULL) == -1 ||
852 sigaction(SIGABRT, &action, NULL) == -1 ||
853 sigaction(SIGFPE, &action, NULL) == -1 ||
854 sigaction(SIGSEGV, &action, NULL) == -1)
855 ELOG("Could not setup signal handler.\n");
858 /* Catch all signals with default action "Term", see signal(7) */
859 if (sigaction(SIGHUP, &action, NULL) == -1 ||
860 sigaction(SIGINT, &action, NULL) == -1 ||
861 sigaction(SIGALRM, &action, NULL) == -1 ||
862 sigaction(SIGUSR1, &action, NULL) == -1 ||
863 sigaction(SIGUSR2, &action, NULL) == -1)
864 ELOG("Could not setup signal handler.\n");
866 /* Ignore SIGPIPE to survive errors when an IPC client disconnects
867 * while we are sending them a message */
868 signal(SIGPIPE, SIG_IGN);
870 /* Autostarting exec-lines */
872 while (!TAILQ_EMPTY(&autostarts)) {
873 struct Autostart *exec = TAILQ_FIRST(&autostarts);
875 LOG("auto-starting %s\n", exec->command);
876 start_application(exec->command, exec->no_startup_id);
879 TAILQ_REMOVE(&autostarts, exec, autostarts);
884 /* Autostarting exec_always-lines */
885 while (!TAILQ_EMPTY(&autostarts_always)) {
886 struct Autostart *exec_always = TAILQ_FIRST(&autostarts_always);
888 LOG("auto-starting (always!) %s\n", exec_always->command);
889 start_application(exec_always->command, exec_always->no_startup_id);
891 FREE(exec_always->command);
892 TAILQ_REMOVE(&autostarts_always, exec_always, autostarts_always);
896 /* Start i3bar processes for all configured bars */
897 Barconfig *barconfig;
898 TAILQ_FOREACH(barconfig, &barconfigs, configs) {
899 char *command = NULL;
900 sasprintf(&command, "%s --bar_id=%s --socket=\"%s\"",
901 barconfig->i3bar_command ? barconfig->i3bar_command : "i3bar",
902 barconfig->id, current_socketpath);
903 LOG("Starting bar process: %s\n", command);
904 start_application(command, true);
908 /* Make sure to destroy the event loop to invoke the cleeanup callbacks
909 * when calling exit() */
912 ev_loop(main_loop, 0);