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 /* Whether this version of i3 is a debug build or a release build. */
29 bool debug_build = false;
31 /** The number of file descriptors passed via socket activation. */
34 static int xkb_event_base;
36 int xkb_current_group;
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_visualid_t visual_id;
62 xcb_colormap_t colormap;
64 struct ev_loop *main_loop;
66 xcb_key_symbols_t *keysyms;
68 /* Those are our connections to X11 for use with libXcursor and XKB */
69 Display *xlibdpy, *xkbdpy;
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;
91 /* This will be set to true when -C is used so that functions can behave
92 * slightly differently. We don’t want i3-nagbar to be started when validating
93 * the config, for example. */
94 bool only_check_config = false;
97 * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
98 * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
101 static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
102 /* empty, because xcb_prepare_cb and xcb_check_cb are used */
106 * Flush before blocking (and waiting for new events)
109 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
114 * Instead of polling the X connection socket we leave this to
115 * xcb_poll_for_event() which knows better than we can ever know.
118 static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
119 xcb_generic_event_t *event;
121 while ((event = xcb_poll_for_event(conn)) != NULL) {
122 if (event->response_type == 0) {
123 if (event_is_ignored(event->sequence, 0))
124 DLOG("Expected X11 Error received for sequence %x\n", event->sequence);
126 xcb_generic_error_t *error = (xcb_generic_error_t*)event;
127 ELOG("X11 Error received! sequence 0x%x, error_code = %d\n",
128 error->sequence, error->error_code);
134 /* Strip off the highest bit (set if the event is generated) */
135 int type = (event->response_type & 0x7F);
137 handle_event(type, event);
145 * When using xmodmap to change the keyboard mapping, this event
146 * is only sent via XKB. Therefore, we need this special handler.
149 static void xkb_got_event(EV_P_ struct ev_io *w, int revents) {
150 DLOG("Handling XKB event\n");
153 /* When using xmodmap, every change (!) gets an own event.
154 * Therefore, we just read all events and only handle the
155 * mapping_notify once. */
156 bool mapping_changed = false;
157 while (XPending(xkbdpy)) {
158 XNextEvent(xkbdpy, (XEvent*)&ev);
159 /* While we should never receive a non-XKB event,
160 * better do sanity checking */
161 if (ev.type != xkb_event_base)
164 if (ev.any.xkb_type == XkbMapNotify) {
165 mapping_changed = true;
169 if (ev.any.xkb_type != XkbStateNotify) {
170 ELOG("Unknown XKB event received (type %d)\n", ev.any.xkb_type);
174 /* See The XKB Extension: Library Specification, section 14.1 */
175 /* We check if the current group (each group contains
176 * two levels) has been changed. Mode_switch activates
177 * group XkbGroup2Index */
178 if (xkb_current_group == ev.state.group)
181 xkb_current_group = ev.state.group;
183 if (ev.state.group == XkbGroup2Index) {
184 DLOG("Mode_switch enabled\n");
185 grab_all_keys(conn, true);
188 if (ev.state.group == XkbGroup1Index) {
189 DLOG("Mode_switch disabled\n");
190 ungrab_all_keys(conn);
191 grab_all_keys(conn, false);
195 if (!mapping_changed)
198 DLOG("Keyboard mapping changed, updating keybindings\n");
199 xcb_key_symbols_free(keysyms);
200 keysyms = xcb_key_symbols_alloc(conn);
202 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
204 ungrab_all_keys(conn);
205 DLOG("Re-grabbing...\n");
207 grab_all_keys(conn, (xkb_current_group == XkbGroup2Index));
212 * Exit handler which destroys the main_loop. Will trigger cleanup handlers.
215 static void i3_exit() {
216 /* We need ev >= 4 for the following code. Since it is not *that* important (it
217 * only makes sure that there are no i3-nagbar instances left behind) we still
218 * support old systems with libev 3. */
219 #if EV_VERSION_MAJOR >= 4
220 ev_loop_destroy(main_loop);
223 if (*shmlogname != '\0') {
224 fprintf(stderr, "Closing SHM log \"%s\"\n", shmlogname);
226 shm_unlink(shmlogname);
231 * (One-shot) Handler for all signals with default action "Term", see signal(7)
233 * Unlinks the SHM log and re-raises the signal.
236 static void handle_signal(int sig, siginfo_t *info, void *data) {
237 fprintf(stderr, "Received signal %d, terminating\n", sig);
238 if (*shmlogname != '\0') {
239 fprintf(stderr, "Closing SHM log \"%s\"\n", shmlogname);
240 shm_unlink(shmlogname);
246 int main(int argc, char *argv[]) {
247 /* Keep a symbol pointing to the I3_VERSION string constant so that we have
248 * it in gdb backtraces. */
249 const char *i3_version = I3_VERSION;
250 char *override_configpath = NULL;
251 bool autostart = true;
252 char *layout_path = NULL;
253 bool delete_layout_path = false;
254 bool force_xinerama = false;
255 bool disable_signalhandler = false;
256 bool enable_32bit_visual = false;
257 static struct option long_options[] = {
258 {"no-autostart", no_argument, 0, 'a'},
259 {"config", required_argument, 0, 'c'},
260 {"version", no_argument, 0, 'v'},
261 {"help", no_argument, 0, 'h'},
262 {"layout", required_argument, 0, 'L'},
263 {"restart", required_argument, 0, 0},
264 {"force-xinerama", no_argument, 0, 0},
265 {"force_xinerama", no_argument, 0, 0},
266 {"disable-signalhandler", no_argument, 0, 0},
267 {"shmlog-size", required_argument, 0, 0},
268 {"shmlog_size", required_argument, 0, 0},
269 {"get-socketpath", no_argument, 0, 0},
270 {"get_socketpath", no_argument, 0, 0},
271 {"enable-32bit-visual", no_argument, 0, 0},
272 {"enable_32bit_visual", no_argument, 0, 0},
275 int option_index = 0, opt;
276 xcb_void_cookie_t colormap_cookie;
278 setlocale(LC_ALL, "");
280 /* Get the RLIMIT_CORE limit at startup time to restore this before
281 * starting processes. */
282 getrlimit(RLIMIT_CORE, &original_rlimit_core);
284 /* Disable output buffering to make redirects in .xsession actually useful for debugging */
285 if (!isatty(fileno(stdout)))
286 setbuf(stdout, NULL);
290 /* Init logging *before* initializing debug_build to guarantee early
294 /* i3_version contains either something like this:
295 * "4.0.2 (2011-11-11, branch "release")".
296 * or: "4.0.2-123-gCOFFEEBABE (2011-11-11, branch "next")".
298 * So we check for the offset of the first opening round bracket to
299 * determine whether this is a git version or a release version. */
300 debug_build = ((strchr(i3_version, '(') - i3_version) > 10);
302 /* On non-release builds, disable SHM logging by default. */
303 shmlog_size = (debug_build ? 25 * 1024 * 1024 : 0);
307 while ((opt = getopt_long(argc, argv, "c:CvaL:hld:V", long_options, &option_index)) != -1) {
310 LOG("Autostart disabled using -a\n");
315 layout_path = sstrdup(optarg);
316 delete_layout_path = false;
319 FREE(override_configpath);
320 override_configpath = sstrdup(optarg);
323 LOG("Checking configuration file only (-C)\n");
324 only_check_config = true;
327 printf("i3 version " I3_VERSION " © 2009-2011 Michael Stapelberg and contributors\n");
333 LOG("Enabling debug loglevel %s\n", optarg);
334 add_loglevel(optarg);
337 /* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */
340 if (strcmp(long_options[option_index].name, "force-xinerama") == 0 ||
341 strcmp(long_options[option_index].name, "force_xinerama") == 0) {
342 force_xinerama = true;
343 ELOG("Using Xinerama instead of RandR. This option should be "
344 "avoided at all cost because it does not refresh the list "
345 "of screens, so you cannot configure displays at runtime. "
346 "Please check if your driver really does not support RandR "
347 "and disable this option as soon as you can.\n");
349 } else if (strcmp(long_options[option_index].name, "disable-signalhandler") == 0) {
350 disable_signalhandler = true;
352 } else if (strcmp(long_options[option_index].name, "get-socketpath") == 0 ||
353 strcmp(long_options[option_index].name, "get_socketpath") == 0) {
354 char *socket_path = root_atom_contents("I3_SOCKET_PATH");
356 printf("%s\n", socket_path);
361 } else if (strcmp(long_options[option_index].name, "shmlog-size") == 0 ||
362 strcmp(long_options[option_index].name, "shmlog_size") == 0) {
363 shmlog_size = atoi(optarg);
364 /* Re-initialize logging immediately to get as many
365 * logmessages as possible into the SHM log. */
367 LOG("Limiting SHM log size to %d bytes\n", shmlog_size);
369 } else if (strcmp(long_options[option_index].name, "restart") == 0) {
371 layout_path = sstrdup(optarg);
372 delete_layout_path = true;
374 } else if (strcmp(long_options[option_index].name, "enable_32bit_visual") == 0 ||
375 strcmp(long_options[option_index].name, "enable-32bit-visual") == 0) {
376 LOG("Enabling 32 bit visual (if available)\n");
377 enable_32bit_visual = true;
382 fprintf(stderr, "Usage: %s [-c configfile] [-d loglevel] [-a] [-v] [-V] [-C]\n", argv[0]);
383 fprintf(stderr, "\n");
384 fprintf(stderr, "\t-a disable autostart ('exec' lines in config)\n");
385 fprintf(stderr, "\t-c <file> use the provided configfile instead\n");
386 fprintf(stderr, "\t-C validate configuration file and exit\n");
387 fprintf(stderr, "\t-d <level> enable debug output with the specified loglevel\n");
388 fprintf(stderr, "\t-L <file> path to the serialized layout during restarts\n");
389 fprintf(stderr, "\t-v display version and exit\n");
390 fprintf(stderr, "\t-V enable verbose mode\n");
391 fprintf(stderr, "\n");
392 fprintf(stderr, "\t--force-xinerama\n"
393 "\tUse Xinerama instead of RandR.\n"
394 "\tThis option should only be used if you are stuck with the\n"
395 "\tnvidia closed source driver which does not support RandR.\n");
396 fprintf(stderr, "\n");
397 fprintf(stderr, "\t--get-socketpath\n"
398 "\tRetrieve the i3 IPC socket path from X11, print it, then exit.\n");
399 fprintf(stderr, "\n");
400 fprintf(stderr, "\t--shmlog-size <limit>\n"
401 "\tLimits the size of the i3 SHM log to <limit> bytes. Setting this\n"
402 "\tto 0 disables SHM logging entirely.\n"
403 "\tThe default is %d bytes.\n", shmlog_size);
404 fprintf(stderr, "\n");
405 fprintf(stderr, "\t--enable-32bit-visual\n"
406 "\tMakes i3 use a 32 bit visual, if available. Necessary for\n"
407 "\tpseudo-transparency with xcompmgr.\n");
408 fprintf(stderr, "\n");
409 fprintf(stderr, "If you pass plain text arguments, i3 will interpret them as a command\n"
410 "to send to a currently running i3 (like i3-msg). This allows you to\n"
411 "use nice and logical commands, such as:\n"
414 "\ti3 floating toggle\n"
421 /* If the user passes more arguments, we act like i3-msg would: Just send
422 * the arguments as an IPC message to i3. This allows for nice semantic
423 * commands such as 'i3 border none'. */
425 /* We enable verbose mode so that the user knows what’s going on.
426 * This should make it easier to find mistakes when the user passes
427 * arguments by mistake. */
430 LOG("Additional arguments passed. Sending them as a command to i3.\n");
431 char *payload = NULL;
432 while (optind < argc) {
434 payload = sstrdup(argv[optind]);
437 sasprintf(&both, "%s %s", payload, argv[optind]);
443 LOG("Command is: %s (%d bytes)\n", payload, strlen(payload));
444 char *socket_path = root_atom_contents("I3_SOCKET_PATH");
446 ELOG("Could not get i3 IPC socket path\n");
450 int sockfd = socket(AF_LOCAL, SOCK_STREAM, 0);
452 err(EXIT_FAILURE, "Could not create socket");
454 struct sockaddr_un addr;
455 memset(&addr, 0, sizeof(struct sockaddr_un));
456 addr.sun_family = AF_LOCAL;
457 strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
458 if (connect(sockfd, (const struct sockaddr*)&addr, sizeof(struct sockaddr_un)) < 0)
459 err(EXIT_FAILURE, "Could not connect to i3");
461 if (ipc_send_message(sockfd, strlen(payload), I3_IPC_MESSAGE_TYPE_COMMAND,
462 (uint8_t*)payload) == -1)
463 err(EXIT_FAILURE, "IPC: write()");
465 uint32_t reply_length;
468 if ((ret = ipc_recv_message(sockfd, I3_IPC_MESSAGE_TYPE_COMMAND,
469 &reply_length, &reply)) != 0) {
471 err(EXIT_FAILURE, "IPC: read()");
474 printf("%.*s\n", reply_length, reply);
478 /* Enable logging to handle the case when the user did not specify --shmlog-size */
481 /* Try to enable core dumps by default when running a debug build */
483 struct rlimit limit = { RLIM_INFINITY, RLIM_INFINITY };
484 setrlimit(RLIMIT_CORE, &limit);
486 /* The following code is helpful, but not required. We thus don’t pay
487 * much attention to error handling, non-linux or other edge cases. */
489 LOG("CORE DUMPS: You are running a development version of i3, so coredumps were automatically enabled (ulimit -c unlimited).\n");
490 if (getcwd(cwd, sizeof(cwd)) != NULL)
491 LOG("CORE DUMPS: Your current working directory is \"%s\".\n", cwd);
493 if ((patternfd = open("/proc/sys/kernel/core_pattern", O_RDONLY)) >= 0) {
494 memset(cwd, '\0', sizeof(cwd));
495 if (read(patternfd, cwd, sizeof(cwd)) > 0)
496 /* a trailing newline is included in cwd */
497 LOG("CORE DUMPS: Your core_pattern is: %s", cwd);
502 LOG("i3 (tree) version " I3_VERSION " starting\n");
504 conn = xcb_connect(NULL, &conn_screen);
505 if (xcb_connection_has_error(conn))
506 errx(EXIT_FAILURE, "Cannot open display\n");
508 sndisplay = sn_xcb_display_new(conn, NULL, NULL);
510 /* Initialize the libev event loop. This needs to be done before loading
511 * the config file because the parser will install an ev_child watcher
512 * for the nagbar when config errors are found. */
513 main_loop = EV_DEFAULT;
514 if (main_loop == NULL)
515 die("Could not initialize libev. Bad LIBEV_FLAGS?\n");
517 root_screen = xcb_aux_get_screen(conn, conn_screen);
518 root = root_screen->root;
520 /* By default, we use the same depth and visual as the root window, which
521 * usually is TrueColor (24 bit depth) and the corresponding visual.
522 * However, we also check if a 32 bit depth and visual are available (for
523 * transparency) and use it if so. */
524 root_depth = root_screen->root_depth;
525 visual_id = root_screen->root_visual;
526 colormap = root_screen->default_colormap;
528 if (enable_32bit_visual) {
529 xcb_depth_iterator_t depth_iter;
530 xcb_visualtype_iterator_t visual_iter;
531 for (depth_iter = xcb_screen_allowed_depths_iterator(root_screen);
533 xcb_depth_next(&depth_iter)) {
534 if (depth_iter.data->depth != 32)
536 visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
537 if (!visual_iter.rem)
540 visual_id = visual_iter.data->visual_id;
541 root_depth = depth_iter.data->depth;
542 colormap = xcb_generate_id(conn);
543 colormap_cookie = xcb_create_colormap_checked(conn, XCB_COLORMAP_ALLOC_NONE, colormap, root, visual_id);
544 DLOG("Found a visual with 32 bit depth.\n");
549 DLOG("root_depth = %d, visual_id = 0x%08x.\n", root_depth, visual_id);
551 xcb_get_geometry_cookie_t gcookie = xcb_get_geometry(conn, root);
552 xcb_query_pointer_cookie_t pointercookie = xcb_query_pointer(conn, root);
554 load_configuration(conn, override_configpath, false);
555 if (only_check_config) {
556 LOG("Done checking configuration file. Exiting.\n");
560 if (config.ipc_socket_path == NULL) {
561 /* Fall back to a file name in /tmp/ based on the PID */
562 if ((config.ipc_socket_path = getenv("I3SOCK")) == NULL)
563 config.ipc_socket_path = get_process_filename("ipc-socket");
565 config.ipc_socket_path = sstrdup(config.ipc_socket_path);
568 uint32_t mask = XCB_CW_EVENT_MASK;
569 uint32_t values[] = { XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
570 XCB_EVENT_MASK_STRUCTURE_NOTIFY | /* when the user adds a screen (e.g. video
571 projector), the root window gets a
573 XCB_EVENT_MASK_POINTER_MOTION |
574 XCB_EVENT_MASK_PROPERTY_CHANGE |
575 XCB_EVENT_MASK_ENTER_WINDOW };
576 xcb_void_cookie_t cookie;
577 cookie = xcb_change_window_attributes_checked(conn, root, mask, values);
578 check_error(conn, cookie, "Another window manager seems to be running");
580 /* By now we already checked for replies once, so let’s see if colormap
581 * creation worked (if requested). */
582 if (colormap != root_screen->default_colormap) {
583 xcb_generic_error_t *error = xcb_request_check(conn, colormap_cookie);
585 ELOG("Could not create ColorMap for 32 bit visual, falling back to X11 default.\n");
586 root_depth = root_screen->root_depth;
587 visual_id = root_screen->root_visual;
588 colormap = root_screen->default_colormap;
589 DLOG("root_depth = %d, visual_id = 0x%08x.\n", root_depth, visual_id);
594 xcb_get_geometry_reply_t *greply = xcb_get_geometry_reply(conn, gcookie, NULL);
595 if (greply == NULL) {
596 ELOG("Could not get geometry of the root window, exiting\n");
599 DLOG("root geometry reply: (%d, %d) %d x %d\n", greply->x, greply->y, greply->width, greply->height);
601 /* Place requests for the atoms we need as soon as possible */
602 #define xmacro(atom) \
603 xcb_intern_atom_cookie_t atom ## _cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
604 #include "atoms.xmacro"
607 /* Initialize the Xlib connection */
608 xlibdpy = xkbdpy = XOpenDisplay(NULL);
610 /* Try to load the X cursors and initialize the XKB extension */
611 if (xlibdpy == NULL) {
612 ELOG("ERROR: XOpenDisplay() failed, disabling libXcursor/XKB support\n");
613 xcursor_supported = false;
614 xkb_supported = false;
615 } else if (fcntl(ConnectionNumber(xlibdpy), F_SETFD, FD_CLOEXEC) == -1) {
616 ELOG("Could not set FD_CLOEXEC on xkbdpy\n");
619 xcursor_load_cursors();
623 /* Set a cursor for the root window (otherwise the root window will show no
624 cursor until the first client is launched). */
625 if (xcursor_supported)
626 xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER);
627 else xcb_set_root_cursor(XCURSOR_CURSOR_POINTER);
631 major = XkbMajorVersion,
632 minor = XkbMinorVersion;
634 if (fcntl(ConnectionNumber(xkbdpy), F_SETFD, FD_CLOEXEC) == -1) {
635 fprintf(stderr, "Could not set FD_CLOEXEC on xkbdpy\n");
640 if (!XkbQueryExtension(xkbdpy,&i1,&xkb_event_base,&errBase,&major,&minor)) {
641 fprintf(stderr, "XKB not supported by X-server\n");
644 /* end of ugliness */
646 if (!XkbSelectEvents(xkbdpy, XkbUseCoreKbd,
647 XkbMapNotifyMask | XkbStateNotifyMask,
648 XkbMapNotifyMask | XkbStateNotifyMask)) {
649 fprintf(stderr, "Could not set XKB event mask\n");
654 /* Setup NetWM atoms */
655 #define xmacro(name) \
657 xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name ## _cookie, NULL); \
659 ELOG("Could not get atom " #name "\n"); \
662 A_ ## name = reply->atom; \
665 #include "atoms.xmacro"
668 property_handlers_init();
672 keysyms = xcb_key_symbols_alloc(conn);
674 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
677 grab_all_keys(conn, false);
679 bool needs_tree_init = true;
681 LOG("Trying to restore the layout from %s...", layout_path);
682 needs_tree_init = !tree_restore(layout_path, greply);
683 if (delete_layout_path)
692 /* Force Xinerama (for drivers which don't support RandR yet, esp. the
693 * nVidia binary graphics driver), when specified either in the config
694 * file or on command-line */
695 if (force_xinerama || config.force_xinerama) {
698 DLOG("Checking for XRandR...\n");
699 randr_init(&randr_base);
702 xcb_query_pointer_reply_t *pointerreply;
703 Output *output = NULL;
704 if (!(pointerreply = xcb_query_pointer_reply(conn, pointercookie, NULL))) {
705 ELOG("Could not query pointer position, using first screen\n");
706 output = get_first_output();
708 DLOG("Pointer at %d, %d\n", pointerreply->root_x, pointerreply->root_y);
709 output = get_output_containing(pointerreply->root_x, pointerreply->root_y);
711 ELOG("ERROR: No screen at (%d, %d), starting on the first screen\n",
712 pointerreply->root_x, pointerreply->root_y);
713 output = get_first_output();
716 con_focus(con_descend_focused(output_get_content(output->con)));
721 /* Create the UNIX domain socket for IPC */
722 int ipc_socket = ipc_create_socket(config.ipc_socket_path);
723 if (ipc_socket == -1) {
724 ELOG("Could not create the IPC socket, IPC disabled\n");
726 free(config.ipc_socket_path);
727 struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
728 ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ);
729 ev_io_start(main_loop, ipc_io);
732 /* Also handle the UNIX domain sockets passed via socket activation. The
733 * parameter 1 means "remove the environment variables", we don’t want to
734 * pass these to child processes. */
735 listen_fds = sd_listen_fds(0);
737 ELOG("socket activation: Error in sd_listen_fds\n");
738 else if (listen_fds == 0)
739 DLOG("socket activation: no sockets passed\n");
742 for (int fd = SD_LISTEN_FDS_START;
743 fd < (SD_LISTEN_FDS_START + listen_fds);
745 DLOG("socket activation: also listening on fd %d\n", fd);
747 /* sd_listen_fds() enables FD_CLOEXEC by default.
748 * However, we need to keep the file descriptors open for in-place
749 * restarting, therefore we explicitly disable FD_CLOEXEC. */
750 if ((flags = fcntl(fd, F_GETFD)) < 0 ||
751 fcntl(fd, F_SETFD, flags & ~FD_CLOEXEC) < 0) {
752 ELOG("Could not disable FD_CLOEXEC on fd %d\n", fd);
755 struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
756 ev_io_init(ipc_io, ipc_new_client, fd, EV_READ);
757 ev_io_start(main_loop, ipc_io);
761 /* Set up i3 specific atoms like I3_SOCKET_PATH and I3_CONFIG_PATH */
764 struct ev_io *xcb_watcher = scalloc(sizeof(struct ev_io));
765 struct ev_io *xkb = scalloc(sizeof(struct ev_io));
766 struct ev_check *xcb_check = scalloc(sizeof(struct ev_check));
767 struct ev_prepare *xcb_prepare = scalloc(sizeof(struct ev_prepare));
769 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
770 ev_io_start(main_loop, xcb_watcher);
774 ev_io_init(xkb, xkb_got_event, ConnectionNumber(xkbdpy), EV_READ);
775 ev_io_start(main_loop, xkb);
777 /* Flush the buffer so that libev can properly get new events */
781 ev_check_init(xcb_check, xcb_check_cb);
782 ev_check_start(main_loop, xcb_check);
784 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
785 ev_prepare_start(main_loop, xcb_prepare);
789 manage_existing_windows(root);
791 struct sigaction action;
793 action.sa_sigaction = handle_signal;
794 action.sa_flags = SA_NODEFER | SA_RESETHAND | SA_SIGINFO;
795 sigemptyset(&action.sa_mask);
797 if (!disable_signalhandler)
798 setup_signal_handler();
800 /* Catch all signals with default action "Core", see signal(7) */
801 if (sigaction(SIGQUIT, &action, NULL) == -1 ||
802 sigaction(SIGILL, &action, NULL) == -1 ||
803 sigaction(SIGABRT, &action, NULL) == -1 ||
804 sigaction(SIGFPE, &action, NULL) == -1 ||
805 sigaction(SIGSEGV, &action, NULL) == -1)
806 ELOG("Could not setup signal handler");
809 /* Catch all signals with default action "Term", see signal(7) */
810 if (sigaction(SIGHUP, &action, NULL) == -1 ||
811 sigaction(SIGINT, &action, NULL) == -1 ||
812 sigaction(SIGALRM, &action, NULL) == -1 ||
813 sigaction(SIGUSR1, &action, NULL) == -1 ||
814 sigaction(SIGUSR2, &action, NULL) == -1)
815 ELOG("Could not setup signal handler");
817 /* Ignore SIGPIPE to survive errors when an IPC client disconnects
818 * while we are sending him a message */
819 signal(SIGPIPE, SIG_IGN);
821 /* Autostarting exec-lines */
823 struct Autostart *exec;
824 TAILQ_FOREACH(exec, &autostarts, autostarts) {
825 LOG("auto-starting %s\n", exec->command);
826 start_application(exec->command, exec->no_startup_id);
830 /* Autostarting exec_always-lines */
831 struct Autostart *exec_always;
832 TAILQ_FOREACH(exec_always, &autostarts_always, autostarts_always) {
833 LOG("auto-starting (always!) %s\n", exec_always->command);
834 start_application(exec_always->command, exec_always->no_startup_id);
837 /* Start i3bar processes for all configured bars */
838 Barconfig *barconfig;
839 TAILQ_FOREACH(barconfig, &barconfigs, configs) {
840 char *command = NULL;
841 sasprintf(&command, "%s --bar_id=%s --socket=\"%s\"",
842 barconfig->i3bar_command ? barconfig->i3bar_command : "i3bar",
843 barconfig->id, current_socketpath);
844 LOG("Starting bar process: %s\n", command);
845 start_application(command, true);
849 /* Make sure to destroy the event loop to invoke the cleeanup callbacks
850 * when calling exit() */
853 ev_loop(main_loop, 0);