2 #define I3__FILE__ "main.c"
4 * vim:ts=4:sw=4:expandtab
6 * i3 - an improved dynamic tiling window manager
7 * © 2009-2013 Michael Stapelberg and contributors (see also: LICENSE)
9 * main.c: Initialization, main loop
14 #include <sys/types.h>
15 #include <sys/socket.h>
18 #include <sys/resource.h>
25 #include "sd-daemon.h"
27 /* The original value of RLIMIT_CORE when i3 was started. We need to restore
28 * this before starting any other process, since we set RLIMIT_CORE to
29 * RLIM_INFINITY for i3 debugging versions. */
30 struct rlimit original_rlimit_core;
32 /** The number of file descriptors passed via socket activation. */
35 /* We keep the xcb_check watcher around to be able to enable and disable it
36 * temporarily for drag_pointer(). */
37 static struct ev_check *xcb_check;
39 static int xkb_event_base;
41 int xkb_current_group;
47 xcb_connection_t *conn;
48 /* The screen (0 when you are using DISPLAY=:0) of the connection 'conn' */
51 /* Display handle for libstartup-notification */
54 /* The last timestamp we got from X11 (timestamps are included in some events
55 * and are used for some things, like determining a unique ID in startup
57 xcb_timestamp_t last_timestamp = XCB_CURRENT_TIME;
59 xcb_screen_t *root_screen;
62 /* Color depth, visual id and colormap to use when creating windows and
63 * pixmaps. Will use 32 bit depth and an appropriate visual, if available,
64 * otherwise the root window’s default (usually 24 bit TrueColor). */
66 xcb_visualid_t visual_id;
67 xcb_colormap_t colormap;
69 struct ev_loop *main_loop;
71 xcb_key_symbols_t *keysyms;
73 /* Those are our connections to X11 for use with libXcursor and XKB */
74 Display *xlibdpy, *xkbdpy;
76 /* Default shmlog size if not set by user. */
77 const int default_shmlog_size = 25 * 1024 * 1024;
79 /* The list of key bindings */
80 struct bindings_head *bindings;
82 /* The list of exec-lines */
83 struct autostarts_head autostarts = TAILQ_HEAD_INITIALIZER(autostarts);
85 /* The list of exec_always lines */
86 struct autostarts_always_head autostarts_always = TAILQ_HEAD_INITIALIZER(autostarts_always);
88 /* The list of assignments */
89 struct assignments_head assignments = TAILQ_HEAD_INITIALIZER(assignments);
91 /* The list of workspace assignments (which workspace should end up on which
93 struct ws_assignments_head ws_assignments = TAILQ_HEAD_INITIALIZER(ws_assignments);
95 /* We hope that those are supported and set them to true */
96 bool xcursor_supported = true;
97 bool xkb_supported = true;
99 /* This will be set to true when -C is used so that functions can behave
100 * slightly differently. We don’t want i3-nagbar to be started when validating
101 * the config, for example. */
102 bool only_check_config = false;
105 * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
106 * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
109 static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
110 /* empty, because xcb_prepare_cb and xcb_check_cb are used */
114 * Flush before blocking (and waiting for new events)
117 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
122 * Instead of polling the X connection socket we leave this to
123 * xcb_poll_for_event() which knows better than we can ever know.
126 static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
127 xcb_generic_event_t *event;
129 while ((event = xcb_poll_for_event(conn)) != NULL) {
130 if (event->response_type == 0) {
131 if (event_is_ignored(event->sequence, 0))
132 DLOG("Expected X11 Error received for sequence %x\n", event->sequence);
134 xcb_generic_error_t *error = (xcb_generic_error_t *)event;
135 DLOG("X11 Error received (probably harmless)! sequence 0x%x, error_code = %d\n",
136 error->sequence, error->error_code);
142 /* Strip off the highest bit (set if the event is generated) */
143 int type = (event->response_type & 0x7F);
145 handle_event(type, event);
152 * Enable or disable the main X11 event handling function.
153 * This is used by drag_pointer() which has its own, modal event handler, which
154 * takes precedence over the normal event handler.
157 void main_set_x11_cb(bool enable) {
158 DLOG("Setting main X11 callback to enabled=%d\n", enable);
160 ev_check_start(main_loop, xcb_check);
161 /* Trigger the watcher explicitly to handle all remaining X11 events.
162 * drag_pointer()’s event handler exits in the middle of the loop. */
163 ev_feed_event(main_loop, xcb_check, 0);
165 ev_check_stop(main_loop, xcb_check);
170 * When using xmodmap to change the keyboard mapping, this event
171 * is only sent via XKB. Therefore, we need this special handler.
174 static void xkb_got_event(EV_P_ struct ev_io *w, int revents) {
175 DLOG("Handling XKB event\n");
178 /* When using xmodmap, every change (!) gets an own event.
179 * Therefore, we just read all events and only handle the
180 * mapping_notify once. */
181 bool mapping_changed = false;
182 while (XPending(xkbdpy)) {
183 XNextEvent(xkbdpy, (XEvent *)&ev);
184 /* While we should never receive a non-XKB event,
185 * better do sanity checking */
186 if (ev.type != xkb_event_base)
189 if (ev.any.xkb_type == XkbMapNotify) {
190 mapping_changed = true;
194 if (ev.any.xkb_type != XkbStateNotify) {
195 ELOG("Unknown XKB event received (type %d)\n", ev.any.xkb_type);
199 /* See The XKB Extension: Library Specification, section 14.1 */
200 /* We check if the current group (each group contains
201 * two levels) has been changed. Mode_switch activates
202 * group XkbGroup2Index */
203 if (xkb_current_group == ev.state.group)
206 xkb_current_group = ev.state.group;
208 if (ev.state.group == XkbGroup2Index) {
209 DLOG("Mode_switch enabled\n");
210 grab_all_keys(conn, true);
213 if (ev.state.group == XkbGroup1Index) {
214 DLOG("Mode_switch disabled\n");
215 ungrab_all_keys(conn);
216 grab_all_keys(conn, false);
220 if (!mapping_changed)
223 DLOG("Keyboard mapping changed, updating keybindings\n");
224 xcb_key_symbols_free(keysyms);
225 keysyms = xcb_key_symbols_alloc(conn);
227 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
229 ungrab_all_keys(conn);
230 DLOG("Re-grabbing...\n");
232 grab_all_keys(conn, (xkb_current_group == XkbGroup2Index));
237 * Exit handler which destroys the main_loop. Will trigger cleanup handlers.
240 static void i3_exit(void) {
241 /* We need ev >= 4 for the following code. Since it is not *that* important (it
242 * only makes sure that there are no i3-nagbar instances left behind) we still
243 * support old systems with libev 3. */
244 #if EV_VERSION_MAJOR >= 4
245 ev_loop_destroy(main_loop);
248 if (*shmlogname != '\0') {
249 fprintf(stderr, "Closing SHM log \"%s\"\n", shmlogname);
251 shm_unlink(shmlogname);
256 * (One-shot) Handler for all signals with default action "Term", see signal(7)
258 * Unlinks the SHM log and re-raises the signal.
261 static void handle_signal(int sig, siginfo_t *info, void *data) {
262 if (*shmlogname != '\0') {
263 shm_unlink(shmlogname);
268 int main(int argc, char *argv[]) {
269 /* Keep a symbol pointing to the I3_VERSION string constant so that we have
270 * it in gdb backtraces. */
271 const char *i3_version __attribute__((unused)) = I3_VERSION;
272 char *override_configpath = NULL;
273 bool autostart = true;
274 char *layout_path = NULL;
275 bool delete_layout_path = false;
276 bool force_xinerama = false;
277 char *fake_outputs = NULL;
278 bool disable_signalhandler = false;
279 static struct option long_options[] = {
280 {"no-autostart", no_argument, 0, 'a'},
281 {"config", required_argument, 0, 'c'},
282 {"version", no_argument, 0, 'v'},
283 {"moreversion", no_argument, 0, 'm'},
284 {"more-version", no_argument, 0, 'm'},
285 {"more_version", no_argument, 0, 'm'},
286 {"help", no_argument, 0, 'h'},
287 {"layout", required_argument, 0, 'L'},
288 {"restart", required_argument, 0, 0},
289 {"force-xinerama", no_argument, 0, 0},
290 {"force_xinerama", no_argument, 0, 0},
291 {"disable-signalhandler", no_argument, 0, 0},
292 {"shmlog-size", required_argument, 0, 0},
293 {"shmlog_size", required_argument, 0, 0},
294 {"get-socketpath", no_argument, 0, 0},
295 {"get_socketpath", no_argument, 0, 0},
296 {"fake_outputs", required_argument, 0, 0},
297 {"fake-outputs", required_argument, 0, 0},
298 {"force-old-config-parser-v4.4-only", no_argument, 0, 0},
300 int option_index = 0, opt;
302 setlocale(LC_ALL, "");
304 /* Get the RLIMIT_CORE limit at startup time to restore this before
305 * starting processes. */
306 getrlimit(RLIMIT_CORE, &original_rlimit_core);
308 /* Disable output buffering to make redirects in .xsession actually useful for debugging */
309 if (!isatty(fileno(stdout)))
310 setbuf(stdout, NULL);
314 /* Init logging *before* initializing debug_build to guarantee early
318 /* On release builds, disable SHM logging by default. */
319 shmlog_size = (is_debug_build() || strstr(argv[0], "i3-with-shmlog") != NULL ? default_shmlog_size : 0);
323 while ((opt = getopt_long(argc, argv, "c:CvmaL:hld:V", long_options, &option_index)) != -1) {
326 LOG("Autostart disabled using -a\n");
331 layout_path = sstrdup(optarg);
332 delete_layout_path = false;
335 FREE(override_configpath);
336 override_configpath = sstrdup(optarg);
339 LOG("Checking configuration file only (-C)\n");
340 only_check_config = true;
343 printf("i3 version " I3_VERSION " © 2009-2014 Michael Stapelberg and contributors\n");
347 printf("Binary i3 version: " I3_VERSION " © 2009-2014 Michael Stapelberg and contributors\n");
348 display_running_version();
355 LOG("Enabling debug logging\n");
356 set_debug_logging(true);
359 /* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */
362 if (strcmp(long_options[option_index].name, "force-xinerama") == 0 ||
363 strcmp(long_options[option_index].name, "force_xinerama") == 0) {
364 force_xinerama = true;
365 ELOG("Using Xinerama instead of RandR. This option should be "
366 "avoided at all cost because it does not refresh the list "
367 "of screens, so you cannot configure displays at runtime. "
368 "Please check if your driver really does not support RandR "
369 "and disable this option as soon as you can.\n");
371 } else if (strcmp(long_options[option_index].name, "disable-signalhandler") == 0) {
372 disable_signalhandler = true;
374 } else if (strcmp(long_options[option_index].name, "get-socketpath") == 0 ||
375 strcmp(long_options[option_index].name, "get_socketpath") == 0) {
376 char *socket_path = root_atom_contents("I3_SOCKET_PATH", NULL, 0);
378 printf("%s\n", socket_path);
383 } else if (strcmp(long_options[option_index].name, "shmlog-size") == 0 ||
384 strcmp(long_options[option_index].name, "shmlog_size") == 0) {
385 shmlog_size = atoi(optarg);
386 /* Re-initialize logging immediately to get as many
387 * logmessages as possible into the SHM log. */
389 LOG("Limiting SHM log size to %d bytes\n", shmlog_size);
391 } else if (strcmp(long_options[option_index].name, "restart") == 0) {
393 layout_path = sstrdup(optarg);
394 delete_layout_path = true;
396 } else if (strcmp(long_options[option_index].name, "fake-outputs") == 0 ||
397 strcmp(long_options[option_index].name, "fake_outputs") == 0) {
398 LOG("Initializing fake outputs: %s\n", optarg);
399 fake_outputs = sstrdup(optarg);
401 } else if (strcmp(long_options[option_index].name, "force-old-config-parser-v4.4-only") == 0) {
402 ELOG("You are passing --force-old-config-parser-v4.4-only, but that flag was removed by now.\n");
407 fprintf(stderr, "Usage: %s [-c configfile] [-d all] [-a] [-v] [-V] [-C]\n", argv[0]);
408 fprintf(stderr, "\n");
409 fprintf(stderr, "\t-a disable autostart ('exec' lines in config)\n");
410 fprintf(stderr, "\t-c <file> use the provided configfile instead\n");
411 fprintf(stderr, "\t-C validate configuration file and exit\n");
412 fprintf(stderr, "\t-d all enable debug output\n");
413 fprintf(stderr, "\t-L <file> path to the serialized layout during restarts\n");
414 fprintf(stderr, "\t-v display version and exit\n");
415 fprintf(stderr, "\t-V enable verbose mode\n");
416 fprintf(stderr, "\n");
417 fprintf(stderr, "\t--force-xinerama\n"
418 "\tUse Xinerama instead of RandR.\n"
419 "\tThis option should only be used if you are stuck with the\n"
420 "\told nVidia closed source driver (older than 302.17), which does\n"
421 "\tnot support RandR.\n");
422 fprintf(stderr, "\n");
423 fprintf(stderr, "\t--get-socketpath\n"
424 "\tRetrieve the i3 IPC socket path from X11, print it, then exit.\n");
425 fprintf(stderr, "\n");
426 fprintf(stderr, "\t--shmlog-size <limit>\n"
427 "\tLimits the size of the i3 SHM log to <limit> bytes. Setting this\n"
428 "\tto 0 disables SHM logging entirely.\n"
429 "\tThe default is %d bytes.\n",
431 fprintf(stderr, "\n");
432 fprintf(stderr, "If you pass plain text arguments, i3 will interpret them as a command\n"
433 "to send to a currently running i3 (like i3-msg). This allows you to\n"
434 "use nice and logical commands, such as:\n"
437 "\ti3 floating toggle\n"
444 /* If the user passes more arguments, we act like i3-msg would: Just send
445 * the arguments as an IPC message to i3. This allows for nice semantic
446 * commands such as 'i3 border none'. */
447 if (!only_check_config && optind < argc) {
448 /* We enable verbose mode so that the user knows what’s going on.
449 * This should make it easier to find mistakes when the user passes
450 * arguments by mistake. */
453 LOG("Additional arguments passed. Sending them as a command to i3.\n");
454 char *payload = NULL;
455 while (optind < argc) {
457 payload = sstrdup(argv[optind]);
460 sasprintf(&both, "%s %s", payload, argv[optind]);
466 DLOG("Command is: %s (%zd bytes)\n", payload, strlen(payload));
467 char *socket_path = root_atom_contents("I3_SOCKET_PATH", NULL, 0);
469 ELOG("Could not get i3 IPC socket path\n");
473 int sockfd = socket(AF_LOCAL, SOCK_STREAM, 0);
475 err(EXIT_FAILURE, "Could not create socket");
477 struct sockaddr_un addr;
478 memset(&addr, 0, sizeof(struct sockaddr_un));
479 addr.sun_family = AF_LOCAL;
480 strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
481 if (connect(sockfd, (const struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0)
482 err(EXIT_FAILURE, "Could not connect to i3");
484 if (ipc_send_message(sockfd, strlen(payload), I3_IPC_MESSAGE_TYPE_COMMAND,
485 (uint8_t *)payload) == -1)
486 err(EXIT_FAILURE, "IPC: write()");
488 uint32_t reply_length;
492 if ((ret = ipc_recv_message(sockfd, &reply_type, &reply_length, &reply)) != 0) {
494 err(EXIT_FAILURE, "IPC: read()");
497 if (reply_type != I3_IPC_MESSAGE_TYPE_COMMAND)
498 errx(EXIT_FAILURE, "IPC: received reply of type %d but expected %d (COMMAND)", reply_type, I3_IPC_MESSAGE_TYPE_COMMAND);
499 printf("%.*s\n", reply_length, reply);
503 /* Enable logging to handle the case when the user did not specify --shmlog-size */
506 /* Try to enable core dumps by default when running a debug build */
507 if (is_debug_build()) {
508 struct rlimit limit = {RLIM_INFINITY, RLIM_INFINITY};
509 setrlimit(RLIMIT_CORE, &limit);
511 /* The following code is helpful, but not required. We thus don’t pay
512 * much attention to error handling, non-linux or other edge cases. */
513 LOG("CORE DUMPS: You are running a development version of i3, so coredumps were automatically enabled (ulimit -c unlimited).\n");
514 size_t cwd_size = 1024;
515 char *cwd = smalloc(cwd_size);
517 while ((cwd_ret = getcwd(cwd, cwd_size)) == NULL && errno == ERANGE) {
518 cwd_size = cwd_size * 2;
519 cwd = srealloc(cwd, cwd_size);
522 LOG("CORE DUMPS: Your current working directory is \"%s\".\n", cwd);
524 if ((patternfd = open("/proc/sys/kernel/core_pattern", O_RDONLY)) >= 0) {
525 memset(cwd, '\0', cwd_size);
526 if (read(patternfd, cwd, cwd_size) > 0)
527 /* a trailing newline is included in cwd */
528 LOG("CORE DUMPS: Your core_pattern is: %s", cwd);
534 LOG("i3 " I3_VERSION " starting\n");
536 conn = xcb_connect(NULL, &conn_screen);
537 if (xcb_connection_has_error(conn))
538 errx(EXIT_FAILURE, "Cannot open display\n");
540 sndisplay = sn_xcb_display_new(conn, NULL, NULL);
542 /* Initialize the libev event loop. This needs to be done before loading
543 * the config file because the parser will install an ev_child watcher
544 * for the nagbar when config errors are found. */
545 main_loop = EV_DEFAULT;
546 if (main_loop == NULL)
547 die("Could not initialize libev. Bad LIBEV_FLAGS?\n");
549 root_screen = xcb_aux_get_screen(conn, conn_screen);
550 root = root_screen->root;
552 /* By default, we use the same depth and visual as the root window, which
553 * usually is TrueColor (24 bit depth) and the corresponding visual.
554 * However, we also check if a 32 bit depth and visual are available (for
555 * transparency) and use it if so. */
556 root_depth = root_screen->root_depth;
557 visual_id = root_screen->root_visual;
558 colormap = root_screen->default_colormap;
560 DLOG("root_depth = %d, visual_id = 0x%08x.\n", root_depth, visual_id);
562 xcb_get_geometry_cookie_t gcookie = xcb_get_geometry(conn, root);
563 xcb_query_pointer_cookie_t pointercookie = xcb_query_pointer(conn, root);
565 load_configuration(conn, override_configpath, false);
566 if (only_check_config) {
567 LOG("Done checking configuration file. Exiting.\n");
571 if (config.ipc_socket_path == NULL) {
572 /* Fall back to a file name in /tmp/ based on the PID */
573 if ((config.ipc_socket_path = getenv("I3SOCK")) == NULL)
574 config.ipc_socket_path = get_process_filename("ipc-socket");
576 config.ipc_socket_path = sstrdup(config.ipc_socket_path);
579 xcb_void_cookie_t cookie;
580 cookie = xcb_change_window_attributes_checked(conn, root, XCB_CW_EVENT_MASK, (uint32_t[]) {ROOT_EVENT_MASK});
581 check_error(conn, cookie, "Another window manager seems to be running");
583 xcb_get_geometry_reply_t *greply = xcb_get_geometry_reply(conn, gcookie, NULL);
584 if (greply == NULL) {
585 ELOG("Could not get geometry of the root window, exiting\n");
588 DLOG("root geometry reply: (%d, %d) %d x %d\n", greply->x, greply->y, greply->width, greply->height);
590 /* Place requests for the atoms we need as soon as possible */
591 #define xmacro(atom) \
592 xcb_intern_atom_cookie_t atom##_cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
593 #include "atoms.xmacro"
596 /* Initialize the Xlib connection */
597 xlibdpy = xkbdpy = XOpenDisplay(NULL);
599 /* Try to load the X cursors and initialize the XKB extension */
600 if (xlibdpy == NULL) {
601 ELOG("ERROR: XOpenDisplay() failed, disabling libXcursor/XKB support\n");
602 xcursor_supported = false;
603 xkb_supported = false;
604 } else if (fcntl(ConnectionNumber(xlibdpy), F_SETFD, FD_CLOEXEC) == -1) {
605 ELOG("Could not set FD_CLOEXEC on xkbdpy\n");
608 xcursor_load_cursors();
612 /* Set a cursor for the root window (otherwise the root window will show no
613 cursor until the first client is launched). */
614 if (xcursor_supported)
615 xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER);
617 xcb_set_root_cursor(XCURSOR_CURSOR_POINTER);
621 major = XkbMajorVersion,
622 minor = XkbMinorVersion;
624 if (fcntl(ConnectionNumber(xkbdpy), F_SETFD, FD_CLOEXEC) == -1) {
625 fprintf(stderr, "Could not set FD_CLOEXEC on xkbdpy\n");
630 if (!XkbQueryExtension(xkbdpy, &i1, &xkb_event_base, &errBase, &major, &minor)) {
631 fprintf(stderr, "XKB not supported by X-server\n");
632 xkb_supported = false;
634 /* end of ugliness */
636 if (xkb_supported && !XkbSelectEvents(xkbdpy, XkbUseCoreKbd, XkbMapNotifyMask | XkbStateNotifyMask, XkbMapNotifyMask | XkbStateNotifyMask)) {
637 fprintf(stderr, "Could not set XKB event mask\n");
644 /* Setup NetWM atoms */
645 #define xmacro(name) \
647 xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name##_cookie, NULL); \
649 ELOG("Could not get atom " #name "\n"); \
652 A_##name = reply->atom; \
655 #include "atoms.xmacro"
658 property_handlers_init();
662 keysyms = xcb_key_symbols_alloc(conn);
664 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
667 grab_all_keys(conn, false);
669 bool needs_tree_init = true;
671 LOG("Trying to restore the layout from %s...", layout_path);
672 needs_tree_init = !tree_restore(layout_path, greply);
673 if (delete_layout_path) {
675 const char *dir = dirname(layout_path);
676 /* possibly fails with ENOTEMPTY if there are files (or
687 /* Setup fake outputs for testing */
688 if (fake_outputs == NULL && config.fake_outputs != NULL)
689 fake_outputs = config.fake_outputs;
691 if (fake_outputs != NULL) {
692 fake_outputs_init(fake_outputs);
694 config.fake_outputs = NULL;
695 } else if (force_xinerama || config.force_xinerama) {
696 /* Force Xinerama (for drivers which don't support RandR yet, esp. the
697 * nVidia binary graphics driver), when specified either in the config
698 * file or on command-line */
701 DLOG("Checking for XRandR...\n");
702 randr_init(&randr_base);
705 scratchpad_fix_resolution();
707 xcb_query_pointer_reply_t *pointerreply;
708 Output *output = NULL;
709 if (!(pointerreply = xcb_query_pointer_reply(conn, pointercookie, NULL))) {
710 ELOG("Could not query pointer position, using first screen\n");
712 DLOG("Pointer at %d, %d\n", pointerreply->root_x, pointerreply->root_y);
713 output = get_output_containing(pointerreply->root_x, pointerreply->root_y);
715 ELOG("ERROR: No screen at (%d, %d), starting on the first screen\n",
716 pointerreply->root_x, pointerreply->root_y);
717 output = get_first_output();
720 con_focus(con_descend_focused(output_get_content(output->con)));
725 /* Create the UNIX domain socket for IPC */
726 int ipc_socket = ipc_create_socket(config.ipc_socket_path);
727 if (ipc_socket == -1) {
728 ELOG("Could not create the IPC socket, IPC disabled\n");
730 struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
731 ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ);
732 ev_io_start(main_loop, ipc_io);
735 /* Also handle the UNIX domain sockets passed via socket activation. The
736 * parameter 1 means "remove the environment variables", we don’t want to
737 * pass these to child processes. */
738 listen_fds = sd_listen_fds(0);
740 ELOG("socket activation: Error in sd_listen_fds\n");
741 else if (listen_fds == 0)
742 DLOG("socket activation: no sockets passed\n");
745 for (int fd = SD_LISTEN_FDS_START;
746 fd < (SD_LISTEN_FDS_START + listen_fds);
748 DLOG("socket activation: also listening on fd %d\n", fd);
750 /* sd_listen_fds() enables FD_CLOEXEC by default.
751 * However, we need to keep the file descriptors open for in-place
752 * restarting, therefore we explicitly disable FD_CLOEXEC. */
753 if ((flags = fcntl(fd, F_GETFD)) < 0 ||
754 fcntl(fd, F_SETFD, flags & ~FD_CLOEXEC) < 0) {
755 ELOG("Could not disable FD_CLOEXEC on fd %d\n", fd);
758 struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
759 ev_io_init(ipc_io, ipc_new_client, fd, EV_READ);
760 ev_io_start(main_loop, ipc_io);
764 /* Set up i3 specific atoms like I3_SOCKET_PATH and I3_CONFIG_PATH */
766 ewmh_update_workarea();
768 /* Set the _NET_CURRENT_DESKTOP property. */
769 ewmh_update_current_desktop();
771 struct ev_io *xcb_watcher = scalloc(sizeof(struct ev_io));
772 struct ev_io *xkb = scalloc(sizeof(struct ev_io));
773 xcb_check = scalloc(sizeof(struct ev_check));
774 struct ev_prepare *xcb_prepare = scalloc(sizeof(struct ev_prepare));
776 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
777 ev_io_start(main_loop, xcb_watcher);
780 ev_io_init(xkb, xkb_got_event, ConnectionNumber(xkbdpy), EV_READ);
781 ev_io_start(main_loop, xkb);
783 /* Flush the buffer so that libev can properly get new events */
787 ev_check_init(xcb_check, xcb_check_cb);
788 ev_check_start(main_loop, xcb_check);
790 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
791 ev_prepare_start(main_loop, xcb_prepare);
795 /* What follows is a fugly consequence of X11 protocol race conditions like
796 * the following: In an i3 in-place restart, i3 will reparent all windows
797 * to the root window, then exec() itself. In the new process, it calls
798 * manage_existing_windows. However, in case any application sent a
799 * generated UnmapNotify message to the WM (as GIMP does), this message
800 * will be handled by i3 *after* managing the window, thus i3 thinks the
801 * window just closed itself. In reality, the message was sent in the time
802 * period where i3 wasn’t running yet.
804 * To prevent this, we grab the server (disables processing of any other
805 * connections), then discard all pending events (since we didn’t do
806 * anything, there cannot be any meaningful responses), then ungrab the
808 xcb_grab_server(conn);
811 xcb_generic_event_t *event;
812 while ((event = xcb_poll_for_event(conn)) != NULL) {
813 if (event->response_type == 0) {
818 /* Strip off the highest bit (set if the event is generated) */
819 int type = (event->response_type & 0x7F);
821 /* We still need to handle MapRequests which are sent in the
822 * timespan starting from when we register as a window manager and
823 * this piece of code which drops events. */
824 if (type == XCB_MAP_REQUEST)
825 handle_event(type, event);
829 manage_existing_windows(root);
831 xcb_ungrab_server(conn);
834 LOG("This is not an in-place restart, copying root window contents to a pixmap\n");
835 xcb_screen_t *root = xcb_aux_get_screen(conn, conn_screen);
836 uint16_t width = root->width_in_pixels;
837 uint16_t height = root->height_in_pixels;
838 xcb_pixmap_t pixmap = xcb_generate_id(conn);
839 xcb_gcontext_t gc = xcb_generate_id(conn);
841 xcb_create_pixmap(conn, root->root_depth, pixmap, root->root, width, height);
843 xcb_create_gc(conn, gc, root->root,
844 XCB_GC_FUNCTION | XCB_GC_PLANE_MASK | XCB_GC_FILL_STYLE | XCB_GC_SUBWINDOW_MODE,
845 (uint32_t[]) {XCB_GX_COPY, ~0, XCB_FILL_STYLE_SOLID, XCB_SUBWINDOW_MODE_INCLUDE_INFERIORS});
847 xcb_copy_area(conn, root->root, pixmap, gc, 0, 0, 0, 0, width, height);
848 xcb_change_window_attributes_checked(conn, root->root, XCB_CW_BACK_PIXMAP, (uint32_t[]) {pixmap});
850 xcb_free_gc(conn, gc);
851 xcb_free_pixmap(conn, pixmap);
854 struct sigaction action;
856 action.sa_sigaction = handle_signal;
857 action.sa_flags = SA_NODEFER | SA_RESETHAND | SA_SIGINFO;
858 sigemptyset(&action.sa_mask);
860 if (!disable_signalhandler)
861 setup_signal_handler();
863 /* Catch all signals with default action "Core", see signal(7) */
864 if (sigaction(SIGQUIT, &action, NULL) == -1 ||
865 sigaction(SIGILL, &action, NULL) == -1 ||
866 sigaction(SIGABRT, &action, NULL) == -1 ||
867 sigaction(SIGFPE, &action, NULL) == -1 ||
868 sigaction(SIGSEGV, &action, NULL) == -1)
869 ELOG("Could not setup signal handler");
872 /* Catch all signals with default action "Term", see signal(7) */
873 if (sigaction(SIGHUP, &action, NULL) == -1 ||
874 sigaction(SIGINT, &action, NULL) == -1 ||
875 sigaction(SIGALRM, &action, NULL) == -1 ||
876 sigaction(SIGUSR1, &action, NULL) == -1 ||
877 sigaction(SIGUSR2, &action, NULL) == -1)
878 ELOG("Could not setup signal handler");
880 /* Ignore SIGPIPE to survive errors when an IPC client disconnects
881 * while we are sending him a message */
882 signal(SIGPIPE, SIG_IGN);
884 /* Autostarting exec-lines */
886 struct Autostart *exec;
887 TAILQ_FOREACH (exec, &autostarts, autostarts) {
888 LOG("auto-starting %s\n", exec->command);
889 start_application(exec->command, exec->no_startup_id);
893 /* Autostarting exec_always-lines */
894 struct Autostart *exec_always;
895 TAILQ_FOREACH (exec_always, &autostarts_always, autostarts_always) {
896 LOG("auto-starting (always!) %s\n", exec_always->command);
897 start_application(exec_always->command, exec_always->no_startup_id);
900 /* Start i3bar processes for all configured bars */
901 Barconfig *barconfig;
902 TAILQ_FOREACH (barconfig, &barconfigs, configs) {
903 char *command = NULL;
904 sasprintf(&command, "%s --bar_id=%s --socket=\"%s\"",
905 barconfig->i3bar_command ? barconfig->i3bar_command : "i3bar",
906 barconfig->id, current_socketpath);
907 LOG("Starting bar process: %s\n", command);
908 start_application(command, true);
912 /* Make sure to destroy the event loop to invoke the cleeanup callbacks
913 * when calling exit() */
916 ev_loop(main_loop, 0);