2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
7 * main.c: Initialization, main loop
12 #include <sys/types.h>
13 #include <sys/socket.h>
16 #include <sys/resource.h>
21 #include "sd-daemon.h"
23 /* The original value of RLIMIT_CORE when i3 was started. We need to restore
24 * this before starting any other process, since we set RLIMIT_CORE to
25 * RLIM_INFINITY for i3 debugging versions. */
26 struct rlimit original_rlimit_core;
28 /** The number of file descriptors passed via socket activation. */
31 static int xkb_event_base;
33 int xkb_current_group;
39 xcb_connection_t *conn;
40 /* The screen (0 when you are using DISPLAY=:0) of the connection 'conn' */
43 /* Display handle for libstartup-notification */
46 /* The last timestamp we got from X11 (timestamps are included in some events
47 * and are used for some things, like determining a unique ID in startup
49 xcb_timestamp_t last_timestamp = XCB_CURRENT_TIME;
51 xcb_screen_t *root_screen;
54 /* Color depth, visual id and colormap to use when creating windows and
55 * pixmaps. Will use 32 bit depth and an appropriate visual, if available,
56 * otherwise the root window’s default (usually 24 bit TrueColor). */
58 xcb_visualid_t visual_id;
59 xcb_colormap_t colormap;
61 struct ev_loop *main_loop;
63 xcb_key_symbols_t *keysyms;
65 /* Those are our connections to X11 for use with libXcursor and XKB */
66 Display *xlibdpy, *xkbdpy;
68 /* The list of key bindings */
69 struct bindings_head *bindings;
71 /* The list of exec-lines */
72 struct autostarts_head autostarts = TAILQ_HEAD_INITIALIZER(autostarts);
74 /* The list of exec_always lines */
75 struct autostarts_always_head autostarts_always = TAILQ_HEAD_INITIALIZER(autostarts_always);
77 /* The list of assignments */
78 struct assignments_head assignments = TAILQ_HEAD_INITIALIZER(assignments);
80 /* The list of workspace assignments (which workspace should end up on which
82 struct ws_assignments_head ws_assignments = TAILQ_HEAD_INITIALIZER(ws_assignments);
84 /* We hope that those are supported and set them to true */
85 bool xcursor_supported = true;
86 bool xkb_supported = true;
88 /* This will be set to true when -C is used so that functions can behave
89 * slightly differently. We don’t want i3-nagbar to be started when validating
90 * the config, for example. */
91 bool only_check_config = false;
94 * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
95 * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
98 static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
99 /* empty, because xcb_prepare_cb and xcb_check_cb are used */
103 * Flush before blocking (and waiting for new events)
106 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
111 * Instead of polling the X connection socket we leave this to
112 * xcb_poll_for_event() which knows better than we can ever know.
115 static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
116 xcb_generic_event_t *event;
118 while ((event = xcb_poll_for_event(conn)) != NULL) {
119 if (event->response_type == 0) {
120 if (event_is_ignored(event->sequence, 0))
121 DLOG("Expected X11 Error received for sequence %x\n", event->sequence);
123 xcb_generic_error_t *error = (xcb_generic_error_t*)event;
124 ELOG("X11 Error received! sequence 0x%x, error_code = %d\n",
125 error->sequence, error->error_code);
131 /* Strip off the highest bit (set if the event is generated) */
132 int type = (event->response_type & 0x7F);
134 handle_event(type, event);
142 * When using xmodmap to change the keyboard mapping, this event
143 * is only sent via XKB. Therefore, we need this special handler.
146 static void xkb_got_event(EV_P_ struct ev_io *w, int revents) {
147 DLOG("Handling XKB event\n");
150 /* When using xmodmap, every change (!) gets an own event.
151 * Therefore, we just read all events and only handle the
152 * mapping_notify once. */
153 bool mapping_changed = false;
154 while (XPending(xkbdpy)) {
155 XNextEvent(xkbdpy, (XEvent*)&ev);
156 /* While we should never receive a non-XKB event,
157 * better do sanity checking */
158 if (ev.type != xkb_event_base)
161 if (ev.any.xkb_type == XkbMapNotify) {
162 mapping_changed = true;
166 if (ev.any.xkb_type != XkbStateNotify) {
167 ELOG("Unknown XKB event received (type %d)\n", ev.any.xkb_type);
171 /* See The XKB Extension: Library Specification, section 14.1 */
172 /* We check if the current group (each group contains
173 * two levels) has been changed. Mode_switch activates
174 * group XkbGroup2Index */
175 if (xkb_current_group == ev.state.group)
178 xkb_current_group = ev.state.group;
180 if (ev.state.group == XkbGroup2Index) {
181 DLOG("Mode_switch enabled\n");
182 grab_all_keys(conn, true);
185 if (ev.state.group == XkbGroup1Index) {
186 DLOG("Mode_switch disabled\n");
187 ungrab_all_keys(conn);
188 grab_all_keys(conn, false);
192 if (!mapping_changed)
195 DLOG("Keyboard mapping changed, updating keybindings\n");
196 xcb_key_symbols_free(keysyms);
197 keysyms = xcb_key_symbols_alloc(conn);
199 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
201 ungrab_all_keys(conn);
202 DLOG("Re-grabbing...\n");
204 grab_all_keys(conn, (xkb_current_group == XkbGroup2Index));
209 * Exit handler which destroys the main_loop. Will trigger cleanup handlers.
212 static void i3_exit(void) {
213 /* We need ev >= 4 for the following code. Since it is not *that* important (it
214 * only makes sure that there are no i3-nagbar instances left behind) we still
215 * support old systems with libev 3. */
216 #if EV_VERSION_MAJOR >= 4
217 ev_loop_destroy(main_loop);
220 if (*shmlogname != '\0') {
221 fprintf(stderr, "Closing SHM log \"%s\"\n", shmlogname);
223 shm_unlink(shmlogname);
228 * (One-shot) Handler for all signals with default action "Term", see signal(7)
230 * Unlinks the SHM log and re-raises the signal.
233 static void handle_signal(int sig, siginfo_t *info, void *data) {
234 fprintf(stderr, "Received signal %d, terminating\n", sig);
235 if (*shmlogname != '\0') {
236 fprintf(stderr, "Closing SHM log \"%s\"\n", shmlogname);
237 shm_unlink(shmlogname);
243 int main(int argc, char *argv[]) {
244 /* Keep a symbol pointing to the I3_VERSION string constant so that we have
245 * it in gdb backtraces. */
246 const char *i3_version __attribute__ ((unused)) = I3_VERSION;
247 char *override_configpath = NULL;
248 bool autostart = true;
249 char *layout_path = NULL;
250 bool delete_layout_path = false;
251 bool force_xinerama = false;
252 char *fake_outputs = NULL;
253 bool disable_signalhandler = false;
254 static struct option long_options[] = {
255 {"no-autostart", no_argument, 0, 'a'},
256 {"config", required_argument, 0, 'c'},
257 {"version", no_argument, 0, 'v'},
258 {"help", no_argument, 0, 'h'},
259 {"layout", required_argument, 0, 'L'},
260 {"restart", required_argument, 0, 0},
261 {"force-xinerama", no_argument, 0, 0},
262 {"force_xinerama", no_argument, 0, 0},
263 {"disable-signalhandler", no_argument, 0, 0},
264 {"shmlog-size", required_argument, 0, 0},
265 {"shmlog_size", required_argument, 0, 0},
266 {"get-socketpath", no_argument, 0, 0},
267 {"get_socketpath", no_argument, 0, 0},
268 {"fake_outputs", required_argument, 0, 0},
269 {"fake-outputs", required_argument, 0, 0},
272 int option_index = 0, opt;
273 xcb_void_cookie_t colormap_cookie;
275 setlocale(LC_ALL, "");
277 /* Get the RLIMIT_CORE limit at startup time to restore this before
278 * starting processes. */
279 getrlimit(RLIMIT_CORE, &original_rlimit_core);
281 /* Disable output buffering to make redirects in .xsession actually useful for debugging */
282 if (!isatty(fileno(stdout)))
283 setbuf(stdout, NULL);
287 /* Init logging *before* initializing debug_build to guarantee early
291 /* On non-release builds, disable SHM logging by default. */
292 shmlog_size = (is_debug_build() ? 25 * 1024 * 1024 : 0);
296 while ((opt = getopt_long(argc, argv, "c:CvaL:hld:V", long_options, &option_index)) != -1) {
299 LOG("Autostart disabled using -a\n");
304 layout_path = sstrdup(optarg);
305 delete_layout_path = false;
308 FREE(override_configpath);
309 override_configpath = sstrdup(optarg);
312 LOG("Checking configuration file only (-C)\n");
313 only_check_config = true;
316 printf("i3 version " I3_VERSION " © 2009-2012 Michael Stapelberg and contributors\n");
322 LOG("Enabling debug loglevel %s\n", optarg);
323 add_loglevel(optarg);
326 /* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */
329 if (strcmp(long_options[option_index].name, "force-xinerama") == 0 ||
330 strcmp(long_options[option_index].name, "force_xinerama") == 0) {
331 force_xinerama = true;
332 ELOG("Using Xinerama instead of RandR. This option should be "
333 "avoided at all cost because it does not refresh the list "
334 "of screens, so you cannot configure displays at runtime. "
335 "Please check if your driver really does not support RandR "
336 "and disable this option as soon as you can.\n");
338 } else if (strcmp(long_options[option_index].name, "disable-signalhandler") == 0) {
339 disable_signalhandler = true;
341 } else if (strcmp(long_options[option_index].name, "get-socketpath") == 0 ||
342 strcmp(long_options[option_index].name, "get_socketpath") == 0) {
343 char *socket_path = root_atom_contents("I3_SOCKET_PATH");
345 printf("%s\n", socket_path);
350 } else if (strcmp(long_options[option_index].name, "shmlog-size") == 0 ||
351 strcmp(long_options[option_index].name, "shmlog_size") == 0) {
352 shmlog_size = atoi(optarg);
353 /* Re-initialize logging immediately to get as many
354 * logmessages as possible into the SHM log. */
356 LOG("Limiting SHM log size to %d bytes\n", shmlog_size);
358 } else if (strcmp(long_options[option_index].name, "restart") == 0) {
360 layout_path = sstrdup(optarg);
361 delete_layout_path = true;
363 } else if (strcmp(long_options[option_index].name, "fake-outputs") == 0 ||
364 strcmp(long_options[option_index].name, "fake_outputs") == 0) {
365 LOG("Initializing fake outputs: %s\n", optarg);
366 fake_outputs = sstrdup(optarg);
371 fprintf(stderr, "Usage: %s [-c configfile] [-d loglevel] [-a] [-v] [-V] [-C]\n", argv[0]);
372 fprintf(stderr, "\n");
373 fprintf(stderr, "\t-a disable autostart ('exec' lines in config)\n");
374 fprintf(stderr, "\t-c <file> use the provided configfile instead\n");
375 fprintf(stderr, "\t-C validate configuration file and exit\n");
376 fprintf(stderr, "\t-d <level> enable debug output with the specified loglevel\n");
377 fprintf(stderr, "\t-L <file> path to the serialized layout during restarts\n");
378 fprintf(stderr, "\t-v display version and exit\n");
379 fprintf(stderr, "\t-V enable verbose mode\n");
380 fprintf(stderr, "\n");
381 fprintf(stderr, "\t--force-xinerama\n"
382 "\tUse Xinerama instead of RandR.\n"
383 "\tThis option should only be used if you are stuck with the\n"
384 "\tnvidia closed source driver which does not support RandR.\n");
385 fprintf(stderr, "\n");
386 fprintf(stderr, "\t--get-socketpath\n"
387 "\tRetrieve the i3 IPC socket path from X11, print it, then exit.\n");
388 fprintf(stderr, "\n");
389 fprintf(stderr, "\t--shmlog-size <limit>\n"
390 "\tLimits the size of the i3 SHM log to <limit> bytes. Setting this\n"
391 "\tto 0 disables SHM logging entirely.\n"
392 "\tThe default is %d bytes.\n", shmlog_size);
393 fprintf(stderr, "\n");
394 fprintf(stderr, "If you pass plain text arguments, i3 will interpret them as a command\n"
395 "to send to a currently running i3 (like i3-msg). This allows you to\n"
396 "use nice and logical commands, such as:\n"
399 "\ti3 floating toggle\n"
406 /* If the user passes more arguments, we act like i3-msg would: Just send
407 * the arguments as an IPC message to i3. This allows for nice semantic
408 * commands such as 'i3 border none'. */
410 /* We enable verbose mode so that the user knows what’s going on.
411 * This should make it easier to find mistakes when the user passes
412 * arguments by mistake. */
415 LOG("Additional arguments passed. Sending them as a command to i3.\n");
416 char *payload = NULL;
417 while (optind < argc) {
419 payload = sstrdup(argv[optind]);
422 sasprintf(&both, "%s %s", payload, argv[optind]);
428 LOG("Command is: %s (%d bytes)\n", payload, strlen(payload));
429 char *socket_path = root_atom_contents("I3_SOCKET_PATH");
431 ELOG("Could not get i3 IPC socket path\n");
435 int sockfd = socket(AF_LOCAL, SOCK_STREAM, 0);
437 err(EXIT_FAILURE, "Could not create socket");
439 struct sockaddr_un addr;
440 memset(&addr, 0, sizeof(struct sockaddr_un));
441 addr.sun_family = AF_LOCAL;
442 strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
443 if (connect(sockfd, (const struct sockaddr*)&addr, sizeof(struct sockaddr_un)) < 0)
444 err(EXIT_FAILURE, "Could not connect to i3");
446 if (ipc_send_message(sockfd, strlen(payload), I3_IPC_MESSAGE_TYPE_COMMAND,
447 (uint8_t*)payload) == -1)
448 err(EXIT_FAILURE, "IPC: write()");
450 uint32_t reply_length;
453 if ((ret = ipc_recv_message(sockfd, I3_IPC_MESSAGE_TYPE_COMMAND,
454 &reply_length, &reply)) != 0) {
456 err(EXIT_FAILURE, "IPC: read()");
459 printf("%.*s\n", reply_length, reply);
463 /* Enable logging to handle the case when the user did not specify --shmlog-size */
466 /* Try to enable core dumps by default when running a debug build */
467 if (is_debug_build()) {
468 struct rlimit limit = { RLIM_INFINITY, RLIM_INFINITY };
469 setrlimit(RLIMIT_CORE, &limit);
471 /* The following code is helpful, but not required. We thus don’t pay
472 * much attention to error handling, non-linux or other edge cases. */
474 LOG("CORE DUMPS: You are running a development version of i3, so coredumps were automatically enabled (ulimit -c unlimited).\n");
475 if (getcwd(cwd, sizeof(cwd)) != NULL)
476 LOG("CORE DUMPS: Your current working directory is \"%s\".\n", cwd);
478 if ((patternfd = open("/proc/sys/kernel/core_pattern", O_RDONLY)) >= 0) {
479 memset(cwd, '\0', sizeof(cwd));
480 if (read(patternfd, cwd, sizeof(cwd)) > 0)
481 /* a trailing newline is included in cwd */
482 LOG("CORE DUMPS: Your core_pattern is: %s", cwd);
487 LOG("i3 (tree) version " I3_VERSION " starting\n");
489 conn = xcb_connect(NULL, &conn_screen);
490 if (xcb_connection_has_error(conn))
491 errx(EXIT_FAILURE, "Cannot open display\n");
493 sndisplay = sn_xcb_display_new(conn, NULL, NULL);
495 /* Initialize the libev event loop. This needs to be done before loading
496 * the config file because the parser will install an ev_child watcher
497 * for the nagbar when config errors are found. */
498 main_loop = EV_DEFAULT;
499 if (main_loop == NULL)
500 die("Could not initialize libev. Bad LIBEV_FLAGS?\n");
502 root_screen = xcb_aux_get_screen(conn, conn_screen);
503 root = root_screen->root;
505 /* By default, we use the same depth and visual as the root window, which
506 * usually is TrueColor (24 bit depth) and the corresponding visual.
507 * However, we also check if a 32 bit depth and visual are available (for
508 * transparency) and use it if so. */
509 root_depth = root_screen->root_depth;
510 visual_id = root_screen->root_visual;
511 colormap = root_screen->default_colormap;
513 DLOG("root_depth = %d, visual_id = 0x%08x.\n", root_depth, visual_id);
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 load_configuration(conn, override_configpath, false);
519 if (only_check_config) {
520 LOG("Done checking configuration file. Exiting.\n");
524 if (config.ipc_socket_path == NULL) {
525 /* Fall back to a file name in /tmp/ based on the PID */
526 if ((config.ipc_socket_path = getenv("I3SOCK")) == NULL)
527 config.ipc_socket_path = get_process_filename("ipc-socket");
529 config.ipc_socket_path = sstrdup(config.ipc_socket_path);
532 uint32_t mask = XCB_CW_EVENT_MASK;
533 uint32_t values[] = { XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
534 XCB_EVENT_MASK_STRUCTURE_NOTIFY | /* when the user adds a screen (e.g. video
535 projector), the root window gets a
537 XCB_EVENT_MASK_POINTER_MOTION |
538 XCB_EVENT_MASK_PROPERTY_CHANGE |
539 XCB_EVENT_MASK_ENTER_WINDOW };
540 xcb_void_cookie_t cookie;
541 cookie = xcb_change_window_attributes_checked(conn, root, mask, values);
542 check_error(conn, cookie, "Another window manager seems to be running");
544 /* By now we already checked for replies once, so let’s see if colormap
545 * creation worked (if requested). */
546 if (colormap != root_screen->default_colormap) {
547 xcb_generic_error_t *error = xcb_request_check(conn, colormap_cookie);
549 ELOG("Could not create ColorMap for 32 bit visual, falling back to X11 default.\n");
550 root_depth = root_screen->root_depth;
551 visual_id = root_screen->root_visual;
552 colormap = root_screen->default_colormap;
553 DLOG("root_depth = %d, visual_id = 0x%08x.\n", root_depth, visual_id);
558 xcb_get_geometry_reply_t *greply = xcb_get_geometry_reply(conn, gcookie, NULL);
559 if (greply == NULL) {
560 ELOG("Could not get geometry of the root window, exiting\n");
563 DLOG("root geometry reply: (%d, %d) %d x %d\n", greply->x, greply->y, greply->width, greply->height);
565 /* Place requests for the atoms we need as soon as possible */
566 #define xmacro(atom) \
567 xcb_intern_atom_cookie_t atom ## _cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
568 #include "atoms.xmacro"
571 /* Initialize the Xlib connection */
572 xlibdpy = xkbdpy = XOpenDisplay(NULL);
574 /* Try to load the X cursors and initialize the XKB extension */
575 if (xlibdpy == NULL) {
576 ELOG("ERROR: XOpenDisplay() failed, disabling libXcursor/XKB support\n");
577 xcursor_supported = false;
578 xkb_supported = false;
579 } else if (fcntl(ConnectionNumber(xlibdpy), F_SETFD, FD_CLOEXEC) == -1) {
580 ELOG("Could not set FD_CLOEXEC on xkbdpy\n");
583 xcursor_load_cursors();
587 /* Set a cursor for the root window (otherwise the root window will show no
588 cursor until the first client is launched). */
589 if (xcursor_supported)
590 xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER);
591 else xcb_set_root_cursor(XCURSOR_CURSOR_POINTER);
595 major = XkbMajorVersion,
596 minor = XkbMinorVersion;
598 if (fcntl(ConnectionNumber(xkbdpy), F_SETFD, FD_CLOEXEC) == -1) {
599 fprintf(stderr, "Could not set FD_CLOEXEC on xkbdpy\n");
604 if (!XkbQueryExtension(xkbdpy,&i1,&xkb_event_base,&errBase,&major,&minor)) {
605 fprintf(stderr, "XKB not supported by X-server\n");
608 /* end of ugliness */
610 if (!XkbSelectEvents(xkbdpy, XkbUseCoreKbd,
611 XkbMapNotifyMask | XkbStateNotifyMask,
612 XkbMapNotifyMask | XkbStateNotifyMask)) {
613 fprintf(stderr, "Could not set XKB event mask\n");
618 /* Setup NetWM atoms */
619 #define xmacro(name) \
621 xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name ## _cookie, NULL); \
623 ELOG("Could not get atom " #name "\n"); \
626 A_ ## name = reply->atom; \
629 #include "atoms.xmacro"
632 property_handlers_init();
636 keysyms = xcb_key_symbols_alloc(conn);
638 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
641 grab_all_keys(conn, false);
643 bool needs_tree_init = true;
645 LOG("Trying to restore the layout from %s...", layout_path);
646 needs_tree_init = !tree_restore(layout_path, greply);
647 if (delete_layout_path)
656 /* Setup fake outputs for testing */
657 if (fake_outputs == NULL && config.fake_outputs != NULL)
658 fake_outputs = config.fake_outputs;
660 if (fake_outputs != NULL) {
661 fake_outputs_init(fake_outputs);
663 config.fake_outputs = NULL;
664 } else if (force_xinerama || config.force_xinerama) {
665 /* Force Xinerama (for drivers which don't support RandR yet, esp. the
666 * nVidia binary graphics driver), when specified either in the config
667 * file or on command-line */
670 DLOG("Checking for XRandR...\n");
671 randr_init(&randr_base);
674 xcb_query_pointer_reply_t *pointerreply;
675 Output *output = NULL;
676 if (!(pointerreply = xcb_query_pointer_reply(conn, pointercookie, NULL))) {
677 ELOG("Could not query pointer position, using first screen\n");
678 output = get_first_output();
680 DLOG("Pointer at %d, %d\n", pointerreply->root_x, pointerreply->root_y);
681 output = get_output_containing(pointerreply->root_x, pointerreply->root_y);
683 ELOG("ERROR: No screen at (%d, %d), starting on the first screen\n",
684 pointerreply->root_x, pointerreply->root_y);
685 output = get_first_output();
688 con_focus(con_descend_focused(output_get_content(output->con)));
693 /* Create the UNIX domain socket for IPC */
694 int ipc_socket = ipc_create_socket(config.ipc_socket_path);
695 if (ipc_socket == -1) {
696 ELOG("Could not create the IPC socket, IPC disabled\n");
698 free(config.ipc_socket_path);
699 struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
700 ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ);
701 ev_io_start(main_loop, ipc_io);
704 /* Also handle the UNIX domain sockets passed via socket activation. The
705 * parameter 1 means "remove the environment variables", we don’t want to
706 * pass these to child processes. */
707 listen_fds = sd_listen_fds(0);
709 ELOG("socket activation: Error in sd_listen_fds\n");
710 else if (listen_fds == 0)
711 DLOG("socket activation: no sockets passed\n");
714 for (int fd = SD_LISTEN_FDS_START;
715 fd < (SD_LISTEN_FDS_START + listen_fds);
717 DLOG("socket activation: also listening on fd %d\n", fd);
719 /* sd_listen_fds() enables FD_CLOEXEC by default.
720 * However, we need to keep the file descriptors open for in-place
721 * restarting, therefore we explicitly disable FD_CLOEXEC. */
722 if ((flags = fcntl(fd, F_GETFD)) < 0 ||
723 fcntl(fd, F_SETFD, flags & ~FD_CLOEXEC) < 0) {
724 ELOG("Could not disable FD_CLOEXEC on fd %d\n", fd);
727 struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
728 ev_io_init(ipc_io, ipc_new_client, fd, EV_READ);
729 ev_io_start(main_loop, ipc_io);
733 /* Set up i3 specific atoms like I3_SOCKET_PATH and I3_CONFIG_PATH */
736 struct ev_io *xcb_watcher = scalloc(sizeof(struct ev_io));
737 struct ev_io *xkb = scalloc(sizeof(struct ev_io));
738 struct ev_check *xcb_check = scalloc(sizeof(struct ev_check));
739 struct ev_prepare *xcb_prepare = scalloc(sizeof(struct ev_prepare));
741 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
742 ev_io_start(main_loop, xcb_watcher);
746 ev_io_init(xkb, xkb_got_event, ConnectionNumber(xkbdpy), EV_READ);
747 ev_io_start(main_loop, xkb);
749 /* Flush the buffer so that libev can properly get new events */
753 ev_check_init(xcb_check, xcb_check_cb);
754 ev_check_start(main_loop, xcb_check);
756 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
757 ev_prepare_start(main_loop, xcb_prepare);
761 manage_existing_windows(root);
763 struct sigaction action;
765 action.sa_sigaction = handle_signal;
766 action.sa_flags = SA_NODEFER | SA_RESETHAND | SA_SIGINFO;
767 sigemptyset(&action.sa_mask);
769 if (!disable_signalhandler)
770 setup_signal_handler();
772 /* Catch all signals with default action "Core", see signal(7) */
773 if (sigaction(SIGQUIT, &action, NULL) == -1 ||
774 sigaction(SIGILL, &action, NULL) == -1 ||
775 sigaction(SIGABRT, &action, NULL) == -1 ||
776 sigaction(SIGFPE, &action, NULL) == -1 ||
777 sigaction(SIGSEGV, &action, NULL) == -1)
778 ELOG("Could not setup signal handler");
781 /* Catch all signals with default action "Term", see signal(7) */
782 if (sigaction(SIGHUP, &action, NULL) == -1 ||
783 sigaction(SIGINT, &action, NULL) == -1 ||
784 sigaction(SIGALRM, &action, NULL) == -1 ||
785 sigaction(SIGUSR1, &action, NULL) == -1 ||
786 sigaction(SIGUSR2, &action, NULL) == -1)
787 ELOG("Could not setup signal handler");
789 /* Ignore SIGPIPE to survive errors when an IPC client disconnects
790 * while we are sending him a message */
791 signal(SIGPIPE, SIG_IGN);
793 /* Autostarting exec-lines */
795 struct Autostart *exec;
796 TAILQ_FOREACH(exec, &autostarts, autostarts) {
797 LOG("auto-starting %s\n", exec->command);
798 start_application(exec->command, exec->no_startup_id);
802 /* Autostarting exec_always-lines */
803 struct Autostart *exec_always;
804 TAILQ_FOREACH(exec_always, &autostarts_always, autostarts_always) {
805 LOG("auto-starting (always!) %s\n", exec_always->command);
806 start_application(exec_always->command, exec_always->no_startup_id);
809 /* Start i3bar processes for all configured bars */
810 Barconfig *barconfig;
811 TAILQ_FOREACH(barconfig, &barconfigs, configs) {
812 char *command = NULL;
813 sasprintf(&command, "%s --bar_id=%s --socket=\"%s\"",
814 barconfig->i3bar_command ? barconfig->i3bar_command : "i3bar",
815 barconfig->id, current_socketpath);
816 LOG("Starting bar process: %s\n", command);
817 start_application(command, true);
821 /* Make sure to destroy the event loop to invoke the cleeanup callbacks
822 * when calling exit() */
825 ev_loop(main_loop, 0);