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);
407 if (connect(sockfd, (const struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0)
408 err(EXIT_FAILURE, "Could not connect to i3");
410 if (ipc_send_message(sockfd, strlen(payload), I3_IPC_MESSAGE_TYPE_COMMAND,
411 (uint8_t *)payload) == -1)
412 err(EXIT_FAILURE, "IPC: write()");
415 uint32_t reply_length;
419 if ((ret = ipc_recv_message(sockfd, &reply_type, &reply_length, &reply)) != 0) {
421 err(EXIT_FAILURE, "IPC: read()");
424 if (reply_type != I3_IPC_MESSAGE_TYPE_COMMAND)
425 errx(EXIT_FAILURE, "IPC: received reply of type %d but expected %d (COMMAND)", reply_type, I3_IPC_MESSAGE_TYPE_COMMAND);
426 printf("%.*s\n", reply_length, reply);
431 /* Enable logging to handle the case when the user did not specify --shmlog-size */
434 /* Try to enable core dumps by default when running a debug build */
435 if (is_debug_build()) {
436 struct rlimit limit = {RLIM_INFINITY, RLIM_INFINITY};
437 setrlimit(RLIMIT_CORE, &limit);
439 /* The following code is helpful, but not required. We thus don’t pay
440 * much attention to error handling, non-linux or other edge cases. */
441 LOG("CORE DUMPS: You are running a development version of i3, so coredumps were automatically enabled (ulimit -c unlimited).\n");
442 size_t cwd_size = 1024;
443 char *cwd = smalloc(cwd_size);
445 while ((cwd_ret = getcwd(cwd, cwd_size)) == NULL && errno == ERANGE) {
446 cwd_size = cwd_size * 2;
447 cwd = srealloc(cwd, cwd_size);
450 LOG("CORE DUMPS: Your current working directory is \"%s\".\n", cwd);
452 if ((patternfd = open("/proc/sys/kernel/core_pattern", O_RDONLY)) >= 0) {
453 memset(cwd, '\0', cwd_size);
454 if (read(patternfd, cwd, cwd_size) > 0)
455 /* a trailing newline is included in cwd */
456 LOG("CORE DUMPS: Your core_pattern is: %s", cwd);
462 LOG("i3 %s starting\n", i3_version);
464 conn = xcb_connect(NULL, &conn_screen);
465 if (xcb_connection_has_error(conn))
466 errx(EXIT_FAILURE, "Cannot open display\n");
468 sndisplay = sn_xcb_display_new(conn, NULL, NULL);
470 /* Initialize the libev event loop. This needs to be done before loading
471 * the config file because the parser will install an ev_child watcher
472 * for the nagbar when config errors are found. */
473 main_loop = EV_DEFAULT;
474 if (main_loop == NULL)
475 die("Could not initialize libev. Bad LIBEV_FLAGS?\n");
477 root_screen = xcb_aux_get_screen(conn, conn_screen);
478 root = root_screen->root;
480 /* Place requests for the atoms we need as soon as possible */
481 #define xmacro(atom) \
482 xcb_intern_atom_cookie_t atom##_cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
483 #include "atoms.xmacro"
486 root_depth = root_screen->root_depth;
487 colormap = root_screen->default_colormap;
488 visual_type = xcb_aux_find_visual_by_attrs(root_screen, -1, 32);
489 if (visual_type != NULL) {
490 root_depth = xcb_aux_get_depth_of_visual(root_screen, visual_type->visual_id);
491 colormap = xcb_generate_id(conn);
493 xcb_void_cookie_t cm_cookie = xcb_create_colormap_checked(conn,
494 XCB_COLORMAP_ALLOC_NONE,
497 visual_type->visual_id);
499 xcb_generic_error_t *error = xcb_request_check(conn, cm_cookie);
501 ELOG("Could not create colormap. Error code: %d\n", error->error_code);
505 visual_type = get_visualtype(root_screen);
510 DLOG("root_depth = %d, visual_id = 0x%08x.\n", root_depth, visual_type->visual_id);
511 DLOG("root_screen->height_in_pixels = %d, root_screen->height_in_millimeters = %d\n",
512 root_screen->height_in_pixels, root_screen->height_in_millimeters);
513 DLOG("One logical pixel corresponds to %d physical pixels on this display.\n", logical_px(1));
515 xcb_get_geometry_cookie_t gcookie = xcb_get_geometry(conn, root);
516 xcb_query_pointer_cookie_t pointercookie = xcb_query_pointer(conn, root);
518 /* Setup NetWM atoms */
519 #define xmacro(name) \
521 xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name##_cookie, NULL); \
523 ELOG("Could not get atom " #name "\n"); \
526 A_##name = reply->atom; \
529 #include "atoms.xmacro"
532 load_configuration(conn, override_configpath, false);
534 if (config.ipc_socket_path == NULL) {
535 /* Fall back to a file name in /tmp/ based on the PID */
536 if ((config.ipc_socket_path = getenv("I3SOCK")) == NULL)
537 config.ipc_socket_path = get_process_filename("ipc-socket");
539 config.ipc_socket_path = sstrdup(config.ipc_socket_path);
542 xcb_void_cookie_t cookie;
543 cookie = xcb_change_window_attributes_checked(conn, root, XCB_CW_EVENT_MASK, (uint32_t[]){ROOT_EVENT_MASK});
544 xcb_generic_error_t *error = xcb_request_check(conn, cookie);
546 ELOG("Another window manager seems to be running (X error %d)\n", error->error_code);
550 xcb_get_geometry_reply_t *greply = xcb_get_geometry_reply(conn, gcookie, NULL);
551 if (greply == NULL) {
552 ELOG("Could not get geometry of the root window, exiting\n");
555 DLOG("root geometry reply: (%d, %d) %d x %d\n", greply->x, greply->y, greply->width, greply->height);
557 xcursor_load_cursors();
559 /* Set a cursor for the root window (otherwise the root window will show no
560 cursor until the first client is launched). */
561 if (xcursor_supported)
562 xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER);
564 xcb_set_root_cursor(XCURSOR_CURSOR_POINTER);
566 const xcb_query_extension_reply_t *extreply;
567 extreply = xcb_get_extension_data(conn, &xcb_xkb_id);
568 xkb_supported = extreply->present;
569 if (!extreply->present) {
570 DLOG("xkb is not present on this server\n");
572 DLOG("initializing xcb-xkb\n");
573 xcb_xkb_use_extension(conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
574 xcb_xkb_select_events(conn,
575 XCB_XKB_ID_USE_CORE_KBD,
576 XCB_XKB_EVENT_TYPE_STATE_NOTIFY | XCB_XKB_EVENT_TYPE_MAP_NOTIFY | XCB_XKB_EVENT_TYPE_NEW_KEYBOARD_NOTIFY,
578 XCB_XKB_EVENT_TYPE_STATE_NOTIFY | XCB_XKB_EVENT_TYPE_MAP_NOTIFY | XCB_XKB_EVENT_TYPE_NEW_KEYBOARD_NOTIFY,
583 /* Setting both, XCB_XKB_PER_CLIENT_FLAG_GRABS_USE_XKB_STATE and
584 * XCB_XKB_PER_CLIENT_FLAG_LOOKUP_STATE_WHEN_GRABBED, will lead to the
585 * X server sending us the full XKB state in KeyPress and KeyRelease:
586 * https://sources.debian.net/src/xorg-server/2:1.17.2-1.1/xkb/xkbEvents.c/?hl=927#L927
588 xcb_xkb_per_client_flags_reply_t *pcf_reply;
589 /* The last three parameters are unset because they are only relevant
590 * when using a feature called “automatic reset of boolean controls”:
591 * http://www.x.org/releases/X11R7.7/doc/kbproto/xkbproto.html#Automatic_Reset_of_Boolean_Controls
593 pcf_reply = xcb_xkb_per_client_flags_reply(
595 xcb_xkb_per_client_flags(
597 XCB_XKB_ID_USE_CORE_KBD,
598 XCB_XKB_PER_CLIENT_FLAG_GRABS_USE_XKB_STATE | XCB_XKB_PER_CLIENT_FLAG_LOOKUP_STATE_WHEN_GRABBED,
599 XCB_XKB_PER_CLIENT_FLAG_GRABS_USE_XKB_STATE | XCB_XKB_PER_CLIENT_FLAG_LOOKUP_STATE_WHEN_GRABBED,
600 0 /* uint32_t ctrlsToChange */,
601 0 /* uint32_t autoCtrls */,
602 0 /* uint32_t autoCtrlsValues */),
604 if (pcf_reply == NULL ||
605 !(pcf_reply->value & XCB_XKB_PER_CLIENT_FLAG_GRABS_USE_XKB_STATE)) {
606 ELOG("Could not set XCB_XKB_PER_CLIENT_FLAG_GRABS_USE_XKB_STATE\n");
608 if (pcf_reply == NULL ||
609 !(pcf_reply->value & XCB_XKB_PER_CLIENT_FLAG_LOOKUP_STATE_WHEN_GRABBED)) {
610 ELOG("Could not set XCB_XKB_PER_CLIENT_FLAG_LOOKUP_STATE_WHEN_GRABBED\n");
613 xkb_base = extreply->first_event;
618 property_handlers_init();
622 keysyms = xcb_key_symbols_alloc(conn);
624 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
627 die("Could not load keymap\n");
632 bool needs_tree_init = true;
633 if (layout_path != NULL) {
634 LOG("Trying to restore the layout from \"%s\".\n", layout_path);
635 needs_tree_init = !tree_restore(layout_path, greply);
636 if (delete_layout_path) {
638 const char *dir = dirname(layout_path);
639 /* possibly fails with ENOTEMPTY if there are files (or
649 /* Setup fake outputs for testing */
650 if (fake_outputs == NULL && config.fake_outputs != NULL)
651 fake_outputs = config.fake_outputs;
653 if (fake_outputs != NULL) {
654 fake_outputs_init(fake_outputs);
656 config.fake_outputs = NULL;
657 } else if (force_xinerama || config.force_xinerama) {
658 /* Force Xinerama (for drivers which don't support RandR yet, esp. the
659 * nVidia binary graphics driver), when specified either in the config
660 * file or on command-line */
663 DLOG("Checking for XRandR...\n");
664 randr_init(&randr_base);
667 /* We need to force disabling outputs which have been loaded from the
668 * layout file but are no longer active. This can happen if the output has
669 * been disabled in the short time between writing the restart layout file
670 * and restarting i3. See #2326. */
671 if (layout_path != NULL && randr_base > -1) {
673 TAILQ_FOREACH(con, &(croot->nodes_head), nodes) {
675 TAILQ_FOREACH(output, &outputs, outputs) {
676 if (output->active || strcmp(con->name, output->name) != 0)
679 /* This will correctly correlate the output with its content
680 * container. We need to make the connection to properly
681 * disable the output. */
682 if (output->con == NULL) {
683 output_init_con(output);
684 output->changed = false;
687 output->to_be_disabled = true;
688 randr_disable_output(output);
694 scratchpad_fix_resolution();
696 xcb_query_pointer_reply_t *pointerreply;
697 Output *output = NULL;
698 if (!(pointerreply = xcb_query_pointer_reply(conn, pointercookie, NULL))) {
699 ELOG("Could not query pointer position, using first screen\n");
701 DLOG("Pointer at %d, %d\n", pointerreply->root_x, pointerreply->root_y);
702 output = get_output_containing(pointerreply->root_x, pointerreply->root_y);
704 ELOG("ERROR: No screen at (%d, %d), starting on the first screen\n",
705 pointerreply->root_x, pointerreply->root_y);
706 output = get_first_output();
709 con_focus(con_descend_focused(output_get_content(output->con)));
715 /* Create the UNIX domain socket for IPC */
716 int ipc_socket = ipc_create_socket(config.ipc_socket_path);
717 if (ipc_socket == -1) {
718 ELOG("Could not create the IPC socket, IPC disabled\n");
720 struct ev_io *ipc_io = scalloc(1, sizeof(struct ev_io));
721 ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ);
722 ev_io_start(main_loop, ipc_io);
725 /* Also handle the UNIX domain sockets passed via socket activation. The
726 * parameter 1 means "remove the environment variables", we don’t want to
727 * pass these to child processes. */
728 listen_fds = sd_listen_fds(0);
730 ELOG("socket activation: Error in sd_listen_fds\n");
731 else if (listen_fds == 0)
732 DLOG("socket activation: no sockets passed\n");
735 for (int fd = SD_LISTEN_FDS_START;
736 fd < (SD_LISTEN_FDS_START + listen_fds);
738 DLOG("socket activation: also listening on fd %d\n", fd);
740 /* sd_listen_fds() enables FD_CLOEXEC by default.
741 * However, we need to keep the file descriptors open for in-place
742 * restarting, therefore we explicitly disable FD_CLOEXEC. */
743 if ((flags = fcntl(fd, F_GETFD)) < 0 ||
744 fcntl(fd, F_SETFD, flags & ~FD_CLOEXEC) < 0) {
745 ELOG("Could not disable FD_CLOEXEC on fd %d\n", fd);
748 struct ev_io *ipc_io = scalloc(1, sizeof(struct ev_io));
749 ev_io_init(ipc_io, ipc_new_client, fd, EV_READ);
750 ev_io_start(main_loop, ipc_io);
754 /* Set up i3 specific atoms like I3_SOCKET_PATH and I3_CONFIG_PATH */
756 ewmh_update_workarea();
758 /* Set the ewmh desktop properties. */
759 ewmh_update_current_desktop();
760 ewmh_update_number_of_desktops();
761 ewmh_update_desktop_names();
762 ewmh_update_desktop_viewport();
764 struct ev_io *xcb_watcher = scalloc(1, sizeof(struct ev_io));
765 xcb_check = scalloc(1, sizeof(struct ev_check));
766 struct ev_prepare *xcb_prepare = scalloc(1, sizeof(struct ev_prepare));
768 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
769 ev_io_start(main_loop, xcb_watcher);
771 ev_check_init(xcb_check, xcb_check_cb);
772 ev_check_start(main_loop, xcb_check);
774 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
775 ev_prepare_start(main_loop, xcb_prepare);
779 /* What follows is a fugly consequence of X11 protocol race conditions like
780 * the following: In an i3 in-place restart, i3 will reparent all windows
781 * to the root window, then exec() itself. In the new process, it calls
782 * manage_existing_windows. However, in case any application sent a
783 * generated UnmapNotify message to the WM (as GIMP does), this message
784 * will be handled by i3 *after* managing the window, thus i3 thinks the
785 * window just closed itself. In reality, the message was sent in the time
786 * period where i3 wasn’t running yet.
788 * To prevent this, we grab the server (disables processing of any other
789 * connections), then discard all pending events (since we didn’t do
790 * anything, there cannot be any meaningful responses), then ungrab the
792 xcb_grab_server(conn);
795 xcb_generic_event_t *event;
796 while ((event = xcb_poll_for_event(conn)) != NULL) {
797 if (event->response_type == 0) {
802 /* Strip off the highest bit (set if the event is generated) */
803 int type = (event->response_type & 0x7F);
805 /* We still need to handle MapRequests which are sent in the
806 * timespan starting from when we register as a window manager and
807 * this piece of code which drops events. */
808 if (type == XCB_MAP_REQUEST)
809 handle_event(type, event);
813 manage_existing_windows(root);
815 xcb_ungrab_server(conn);
818 LOG("This is not an in-place restart, copying root window contents to a pixmap\n");
819 xcb_screen_t *root = xcb_aux_get_screen(conn, conn_screen);
820 uint16_t width = root->width_in_pixels;
821 uint16_t height = root->height_in_pixels;
822 xcb_pixmap_t pixmap = xcb_generate_id(conn);
823 xcb_gcontext_t gc = xcb_generate_id(conn);
825 xcb_create_pixmap(conn, root->root_depth, pixmap, root->root, width, height);
827 xcb_create_gc(conn, gc, root->root,
828 XCB_GC_FUNCTION | XCB_GC_PLANE_MASK | XCB_GC_FILL_STYLE | XCB_GC_SUBWINDOW_MODE,
829 (uint32_t[]){XCB_GX_COPY, ~0, XCB_FILL_STYLE_SOLID, XCB_SUBWINDOW_MODE_INCLUDE_INFERIORS});
831 xcb_copy_area(conn, root->root, pixmap, gc, 0, 0, 0, 0, width, height);
832 xcb_change_window_attributes(conn, root->root, XCB_CW_BACK_PIXMAP, (uint32_t[]){pixmap});
834 xcb_free_gc(conn, gc);
835 xcb_free_pixmap(conn, pixmap);
838 #if defined(__OpenBSD__)
839 if (pledge("stdio rpath wpath cpath proc exec unix", NULL) == -1)
840 err(EXIT_FAILURE, "pledge");
843 struct sigaction action;
845 action.sa_sigaction = handle_signal;
846 action.sa_flags = SA_NODEFER | SA_RESETHAND | SA_SIGINFO;
847 sigemptyset(&action.sa_mask);
849 if (!disable_signalhandler)
850 setup_signal_handler();
852 /* Catch all signals with default action "Core", see signal(7) */
853 if (sigaction(SIGQUIT, &action, NULL) == -1 ||
854 sigaction(SIGILL, &action, NULL) == -1 ||
855 sigaction(SIGABRT, &action, NULL) == -1 ||
856 sigaction(SIGFPE, &action, NULL) == -1 ||
857 sigaction(SIGSEGV, &action, NULL) == -1)
858 ELOG("Could not setup signal handler.\n");
861 /* Catch all signals with default action "Term", see signal(7) */
862 if (sigaction(SIGHUP, &action, NULL) == -1 ||
863 sigaction(SIGINT, &action, NULL) == -1 ||
864 sigaction(SIGALRM, &action, NULL) == -1 ||
865 sigaction(SIGUSR1, &action, NULL) == -1 ||
866 sigaction(SIGUSR2, &action, NULL) == -1)
867 ELOG("Could not setup signal handler.\n");
869 /* Ignore SIGPIPE to survive errors when an IPC client disconnects
870 * while we are sending them a message */
871 signal(SIGPIPE, SIG_IGN);
873 /* Autostarting exec-lines */
875 while (!TAILQ_EMPTY(&autostarts)) {
876 struct Autostart *exec = TAILQ_FIRST(&autostarts);
878 LOG("auto-starting %s\n", exec->command);
879 start_application(exec->command, exec->no_startup_id);
882 TAILQ_REMOVE(&autostarts, exec, autostarts);
887 /* Autostarting exec_always-lines */
888 while (!TAILQ_EMPTY(&autostarts_always)) {
889 struct Autostart *exec_always = TAILQ_FIRST(&autostarts_always);
891 LOG("auto-starting (always!) %s\n", exec_always->command);
892 start_application(exec_always->command, exec_always->no_startup_id);
894 FREE(exec_always->command);
895 TAILQ_REMOVE(&autostarts_always, exec_always, autostarts_always);
899 /* Start i3bar processes for all configured bars */
900 Barconfig *barconfig;
901 TAILQ_FOREACH(barconfig, &barconfigs, configs) {
902 char *command = NULL;
903 sasprintf(&command, "%s --bar_id=%s --socket=\"%s\"",
904 barconfig->i3bar_command ? barconfig->i3bar_command : "i3bar",
905 barconfig->id, current_socketpath);
906 LOG("Starting bar process: %s\n", command);
907 start_application(command, true);
911 /* Make sure to destroy the event loop to invoke the cleeanup callbacks
912 * when calling exit() */
915 ev_loop(main_loop, 0);