i3
main.c
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1 /*
2  * vim:ts=4:sw=4:expandtab
3  *
4  * i3 - an improved dynamic tiling window manager
5  * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
6  *
7  * main.c: Initialization, main loop
8  *
9  */
10 #include <ev.h>
11 #include <fcntl.h>
12 #include <sys/types.h>
13 #include <sys/socket.h>
14 #include <sys/un.h>
15 #include <sys/time.h>
16 #include <sys/resource.h>
17 #include <sys/mman.h>
18 #include <sys/stat.h>
19 #include "all.h"
20 
21 #include "sd-daemon.h"
22 
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;
27 
28 /* Whether this version of i3 is a debug build or a release build. */
29 bool debug_build = false;
30 
33 
34 static int xkb_event_base;
35 
37 
38 extern Con *focused;
39 
40 char **start_argv;
41 
42 xcb_connection_t *conn;
43 /* The screen (0 when you are using DISPLAY=:0) of the connection 'conn' */
45 
46 /* Display handle for libstartup-notification */
47 SnDisplay *sndisplay;
48 
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
51  * notification). */
52 xcb_timestamp_t last_timestamp = XCB_CURRENT_TIME;
53 
54 xcb_screen_t *root_screen;
55 xcb_window_t root;
56 
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). */
60 uint8_t root_depth;
61 xcb_visualid_t visual_id;
62 xcb_colormap_t colormap;
63 
64 struct ev_loop *main_loop;
65 
66 xcb_key_symbols_t *keysyms;
67 
68 /* Those are our connections to X11 for use with libXcursor and XKB */
69 Display *xlibdpy, *xkbdpy;
70 
71 /* The list of key bindings */
72 struct bindings_head *bindings;
73 
74 /* The list of exec-lines */
75 struct autostarts_head autostarts = TAILQ_HEAD_INITIALIZER(autostarts);
76 
77 /* The list of exec_always lines */
79 
80 /* The list of assignments */
81 struct assignments_head assignments = TAILQ_HEAD_INITIALIZER(assignments);
82 
83 /* The list of workspace assignments (which workspace should end up on which
84  * output) */
86 
87 /* We hope that those are supported and set them to true */
88 bool xcursor_supported = true;
89 bool xkb_supported = true;
90 
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;
95 
96 /*
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
99  *
100  */
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 */
103 }
104 
105 /*
106  * Flush before blocking (and waiting for new events)
107  *
108  */
109 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
110  xcb_flush(conn);
111 }
112 
113 /*
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.
116  *
117  */
118 static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
119  xcb_generic_event_t *event;
120 
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);
125  else {
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);
129  }
130  free(event);
131  continue;
132  }
133 
134  /* Strip off the highest bit (set if the event is generated) */
135  int type = (event->response_type & 0x7F);
136 
137  handle_event(type, event);
138 
139  free(event);
140  }
141 }
142 
143 
144 /*
145  * When using xmodmap to change the keyboard mapping, this event
146  * is only sent via XKB. Therefore, we need this special handler.
147  *
148  */
149 static void xkb_got_event(EV_P_ struct ev_io *w, int revents) {
150  DLOG("Handling XKB event\n");
151  XkbEvent ev;
152 
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)
162  continue;
163 
164  if (ev.any.xkb_type == XkbMapNotify) {
165  mapping_changed = true;
166  continue;
167  }
168 
169  if (ev.any.xkb_type != XkbStateNotify) {
170  ELOG("Unknown XKB event received (type %d)\n", ev.any.xkb_type);
171  continue;
172  }
173 
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)
179  continue;
180 
181  xkb_current_group = ev.state.group;
182 
183  if (ev.state.group == XkbGroup2Index) {
184  DLOG("Mode_switch enabled\n");
185  grab_all_keys(conn, true);
186  }
187 
188  if (ev.state.group == XkbGroup1Index) {
189  DLOG("Mode_switch disabled\n");
191  grab_all_keys(conn, false);
192  }
193  }
194 
195  if (!mapping_changed)
196  return;
197 
198  DLOG("Keyboard mapping changed, updating keybindings\n");
199  xcb_key_symbols_free(keysyms);
200  keysyms = xcb_key_symbols_alloc(conn);
201 
203 
205  DLOG("Re-grabbing...\n");
207  grab_all_keys(conn, (xkb_current_group == XkbGroup2Index));
208  DLOG("Done\n");
209 }
210 
211 /*
212  * Exit handler which destroys the main_loop. Will trigger cleanup handlers.
213  *
214  */
215 static void i3_exit(void) {
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);
221 #endif
222 
223  if (*shmlogname != '\0') {
224  fprintf(stderr, "Closing SHM log \"%s\"\n", shmlogname);
225  fflush(stderr);
226  shm_unlink(shmlogname);
227  }
228 }
229 
230 /*
231  * (One-shot) Handler for all signals with default action "Term", see signal(7)
232  *
233  * Unlinks the SHM log and re-raises the signal.
234  *
235  */
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);
241  }
242  fflush(stderr);
243  raise(sig);
244 }
245 
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  char *fake_outputs = NULL;
256  bool disable_signalhandler = 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  {"fake_outputs", required_argument, 0, 0},
272  {"fake-outputs", required_argument, 0, 0},
273  {0, 0, 0, 0}
274  };
275  int option_index = 0, opt;
276  xcb_void_cookie_t colormap_cookie;
277 
278  setlocale(LC_ALL, "");
279 
280  /* Get the RLIMIT_CORE limit at startup time to restore this before
281  * starting processes. */
282  getrlimit(RLIMIT_CORE, &original_rlimit_core);
283 
284  /* Disable output buffering to make redirects in .xsession actually useful for debugging */
285  if (!isatty(fileno(stdout)))
286  setbuf(stdout, NULL);
287 
288  srand(time(NULL));
289 
290  /* Init logging *before* initializing debug_build to guarantee early
291  * (file) logging. */
292  init_logging();
293 
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")".
297  *
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);
301 
302  /* On non-release builds, disable SHM logging by default. */
303  shmlog_size = (debug_build ? 25 * 1024 * 1024 : 0);
304 
305  start_argv = argv;
306 
307  while ((opt = getopt_long(argc, argv, "c:CvaL:hld:V", long_options, &option_index)) != -1) {
308  switch (opt) {
309  case 'a':
310  LOG("Autostart disabled using -a\n");
311  autostart = false;
312  break;
313  case 'L':
314  FREE(layout_path);
315  layout_path = sstrdup(optarg);
316  delete_layout_path = false;
317  break;
318  case 'c':
319  FREE(override_configpath);
320  override_configpath = sstrdup(optarg);
321  break;
322  case 'C':
323  LOG("Checking configuration file only (-C)\n");
324  only_check_config = true;
325  break;
326  case 'v':
327  printf("i3 version " I3_VERSION " © 2009-2012 Michael Stapelberg and contributors\n");
328  exit(EXIT_SUCCESS);
329  case 'V':
330  set_verbosity(true);
331  break;
332  case 'd':
333  LOG("Enabling debug loglevel %s\n", optarg);
334  add_loglevel(optarg);
335  break;
336  case 'l':
337  /* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */
338  break;
339  case 0:
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");
348  break;
349  } else if (strcmp(long_options[option_index].name, "disable-signalhandler") == 0) {
350  disable_signalhandler = true;
351  break;
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");
355  if (socket_path) {
356  printf("%s\n", socket_path);
357  return 0;
358  }
359 
360  return 1;
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. */
366  init_logging();
367  LOG("Limiting SHM log size to %d bytes\n", shmlog_size);
368  break;
369  } else if (strcmp(long_options[option_index].name, "restart") == 0) {
370  FREE(layout_path);
371  layout_path = sstrdup(optarg);
372  delete_layout_path = true;
373  break;
374  } else if (strcmp(long_options[option_index].name, "fake-outputs") == 0 ||
375  strcmp(long_options[option_index].name, "fake_outputs") == 0) {
376  LOG("Initializing fake outputs: %s\n", optarg);
377  fake_outputs = sstrdup(optarg);
378  break;
379  }
380  /* fall-through */
381  default:
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, "If you pass plain text arguments, i3 will interpret them as a command\n"
406  "to send to a currently running i3 (like i3-msg). This allows you to\n"
407  "use nice and logical commands, such as:\n"
408  "\n"
409  "\ti3 border none\n"
410  "\ti3 floating toggle\n"
411  "\ti3 kill window\n"
412  "\n");
413  exit(EXIT_FAILURE);
414  }
415  }
416 
417  /* If the user passes more arguments, we act like i3-msg would: Just send
418  * the arguments as an IPC message to i3. This allows for nice semantic
419  * commands such as 'i3 border none'. */
420  if (optind < argc) {
421  /* We enable verbose mode so that the user knows what’s going on.
422  * This should make it easier to find mistakes when the user passes
423  * arguments by mistake. */
424  set_verbosity(true);
425 
426  LOG("Additional arguments passed. Sending them as a command to i3.\n");
427  char *payload = NULL;
428  while (optind < argc) {
429  if (!payload) {
430  payload = sstrdup(argv[optind]);
431  } else {
432  char *both;
433  sasprintf(&both, "%s %s", payload, argv[optind]);
434  free(payload);
435  payload = both;
436  }
437  optind++;
438  }
439  LOG("Command is: %s (%d bytes)\n", payload, strlen(payload));
440  char *socket_path = root_atom_contents("I3_SOCKET_PATH");
441  if (!socket_path) {
442  ELOG("Could not get i3 IPC socket path\n");
443  return 1;
444  }
445 
446  int sockfd = socket(AF_LOCAL, SOCK_STREAM, 0);
447  if (sockfd == -1)
448  err(EXIT_FAILURE, "Could not create socket");
449 
450  struct sockaddr_un addr;
451  memset(&addr, 0, sizeof(struct sockaddr_un));
452  addr.sun_family = AF_LOCAL;
453  strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
454  if (connect(sockfd, (const struct sockaddr*)&addr, sizeof(struct sockaddr_un)) < 0)
455  err(EXIT_FAILURE, "Could not connect to i3");
456 
457  if (ipc_send_message(sockfd, strlen(payload), I3_IPC_MESSAGE_TYPE_COMMAND,
458  (uint8_t*)payload) == -1)
459  err(EXIT_FAILURE, "IPC: write()");
460 
461  uint32_t reply_length;
462  uint8_t *reply;
463  int ret;
464  if ((ret = ipc_recv_message(sockfd, I3_IPC_MESSAGE_TYPE_COMMAND,
465  &reply_length, &reply)) != 0) {
466  if (ret == -1)
467  err(EXIT_FAILURE, "IPC: read()");
468  return 1;
469  }
470  printf("%.*s\n", reply_length, reply);
471  return 0;
472  }
473 
474  /* Enable logging to handle the case when the user did not specify --shmlog-size */
475  init_logging();
476 
477  /* Try to enable core dumps by default when running a debug build */
478  if (debug_build) {
479  struct rlimit limit = { RLIM_INFINITY, RLIM_INFINITY };
480  setrlimit(RLIMIT_CORE, &limit);
481 
482  /* The following code is helpful, but not required. We thus don’t pay
483  * much attention to error handling, non-linux or other edge cases. */
484  char cwd[PATH_MAX];
485  LOG("CORE DUMPS: You are running a development version of i3, so coredumps were automatically enabled (ulimit -c unlimited).\n");
486  if (getcwd(cwd, sizeof(cwd)) != NULL)
487  LOG("CORE DUMPS: Your current working directory is \"%s\".\n", cwd);
488  int patternfd;
489  if ((patternfd = open("/proc/sys/kernel/core_pattern", O_RDONLY)) >= 0) {
490  memset(cwd, '\0', sizeof(cwd));
491  if (read(patternfd, cwd, sizeof(cwd)) > 0)
492  /* a trailing newline is included in cwd */
493  LOG("CORE DUMPS: Your core_pattern is: %s", cwd);
494  close(patternfd);
495  }
496  }
497 
498  LOG("i3 (tree) version " I3_VERSION " starting\n");
499 
500  conn = xcb_connect(NULL, &conn_screen);
501  if (xcb_connection_has_error(conn))
502  errx(EXIT_FAILURE, "Cannot open display\n");
503 
504  sndisplay = sn_xcb_display_new(conn, NULL, NULL);
505 
506  /* Initialize the libev event loop. This needs to be done before loading
507  * the config file because the parser will install an ev_child watcher
508  * for the nagbar when config errors are found. */
509  main_loop = EV_DEFAULT;
510  if (main_loop == NULL)
511  die("Could not initialize libev. Bad LIBEV_FLAGS?\n");
512 
513  root_screen = xcb_aux_get_screen(conn, conn_screen);
514  root = root_screen->root;
515 
516  /* By default, we use the same depth and visual as the root window, which
517  * usually is TrueColor (24 bit depth) and the corresponding visual.
518  * However, we also check if a 32 bit depth and visual are available (for
519  * transparency) and use it if so. */
520  root_depth = root_screen->root_depth;
521  visual_id = root_screen->root_visual;
522  colormap = root_screen->default_colormap;
523 
524  DLOG("root_depth = %d, visual_id = 0x%08x.\n", root_depth, visual_id);
525 
526  xcb_get_geometry_cookie_t gcookie = xcb_get_geometry(conn, root);
527  xcb_query_pointer_cookie_t pointercookie = xcb_query_pointer(conn, root);
528 
529  load_configuration(conn, override_configpath, false);
530  if (only_check_config) {
531  LOG("Done checking configuration file. Exiting.\n");
532  exit(0);
533  }
534 
535  if (config.ipc_socket_path == NULL) {
536  /* Fall back to a file name in /tmp/ based on the PID */
537  if ((config.ipc_socket_path = getenv("I3SOCK")) == NULL)
539  else
541  }
542 
543  uint32_t mask = XCB_CW_EVENT_MASK;
544  uint32_t values[] = { XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
545  XCB_EVENT_MASK_STRUCTURE_NOTIFY | /* when the user adds a screen (e.g. video
546  projector), the root window gets a
547  ConfigureNotify */
548  XCB_EVENT_MASK_POINTER_MOTION |
549  XCB_EVENT_MASK_PROPERTY_CHANGE |
550  XCB_EVENT_MASK_ENTER_WINDOW };
551  xcb_void_cookie_t cookie;
552  cookie = xcb_change_window_attributes_checked(conn, root, mask, values);
553  check_error(conn, cookie, "Another window manager seems to be running");
554 
555  /* By now we already checked for replies once, so let’s see if colormap
556  * creation worked (if requested). */
557  if (colormap != root_screen->default_colormap) {
558  xcb_generic_error_t *error = xcb_request_check(conn, colormap_cookie);
559  if (error != NULL) {
560  ELOG("Could not create ColorMap for 32 bit visual, falling back to X11 default.\n");
561  root_depth = root_screen->root_depth;
562  visual_id = root_screen->root_visual;
563  colormap = root_screen->default_colormap;
564  DLOG("root_depth = %d, visual_id = 0x%08x.\n", root_depth, visual_id);
565  free(error);
566  }
567  }
568 
569  xcb_get_geometry_reply_t *greply = xcb_get_geometry_reply(conn, gcookie, NULL);
570  if (greply == NULL) {
571  ELOG("Could not get geometry of the root window, exiting\n");
572  return 1;
573  }
574  DLOG("root geometry reply: (%d, %d) %d x %d\n", greply->x, greply->y, greply->width, greply->height);
575 
576  /* Place requests for the atoms we need as soon as possible */
577  #define xmacro(atom) \
578  xcb_intern_atom_cookie_t atom ## _cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
579  #include "atoms.xmacro"
580  #undef xmacro
581 
582  /* Initialize the Xlib connection */
583  xlibdpy = xkbdpy = XOpenDisplay(NULL);
584 
585  /* Try to load the X cursors and initialize the XKB extension */
586  if (xlibdpy == NULL) {
587  ELOG("ERROR: XOpenDisplay() failed, disabling libXcursor/XKB support\n");
588  xcursor_supported = false;
589  xkb_supported = false;
590  } else if (fcntl(ConnectionNumber(xlibdpy), F_SETFD, FD_CLOEXEC) == -1) {
591  ELOG("Could not set FD_CLOEXEC on xkbdpy\n");
592  return 1;
593  } else {
595  /*init_xkb();*/
596  }
597 
598  /* Set a cursor for the root window (otherwise the root window will show no
599  cursor until the first client is launched). */
600  if (xcursor_supported)
603 
604  if (xkb_supported) {
605  int errBase,
606  major = XkbMajorVersion,
607  minor = XkbMinorVersion;
608 
609  if (fcntl(ConnectionNumber(xkbdpy), F_SETFD, FD_CLOEXEC) == -1) {
610  fprintf(stderr, "Could not set FD_CLOEXEC on xkbdpy\n");
611  return 1;
612  }
613 
614  int i1;
615  if (!XkbQueryExtension(xkbdpy,&i1,&xkb_event_base,&errBase,&major,&minor)) {
616  fprintf(stderr, "XKB not supported by X-server\n");
617  return 1;
618  }
619  /* end of ugliness */
620 
621  if (!XkbSelectEvents(xkbdpy, XkbUseCoreKbd,
622  XkbMapNotifyMask | XkbStateNotifyMask,
623  XkbMapNotifyMask | XkbStateNotifyMask)) {
624  fprintf(stderr, "Could not set XKB event mask\n");
625  return 1;
626  }
627  }
628 
629  /* Setup NetWM atoms */
630  #define xmacro(name) \
631  do { \
632  xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name ## _cookie, NULL); \
633  if (!reply) { \
634  ELOG("Could not get atom " #name "\n"); \
635  exit(-1); \
636  } \
637  A_ ## name = reply->atom; \
638  free(reply); \
639  } while (0);
640  #include "atoms.xmacro"
641  #undef xmacro
642 
644 
646 
647  keysyms = xcb_key_symbols_alloc(conn);
648 
650 
652  grab_all_keys(conn, false);
653 
654  bool needs_tree_init = true;
655  if (layout_path) {
656  LOG("Trying to restore the layout from %s...", layout_path);
657  needs_tree_init = !tree_restore(layout_path, greply);
658  if (delete_layout_path)
659  unlink(layout_path);
660  free(layout_path);
661  }
662  if (needs_tree_init)
663  tree_init(greply);
664 
665  free(greply);
666 
667  /* Setup fake outputs for testing */
668  if (fake_outputs == NULL && config.fake_outputs != NULL)
669  fake_outputs = config.fake_outputs;
670 
671  if (fake_outputs != NULL) {
672  fake_outputs_init(fake_outputs);
673  FREE(fake_outputs);
674  config.fake_outputs = NULL;
675  } else if (force_xinerama || config.force_xinerama) {
676  /* Force Xinerama (for drivers which don't support RandR yet, esp. the
677  * nVidia binary graphics driver), when specified either in the config
678  * file or on command-line */
679  xinerama_init();
680  } else {
681  DLOG("Checking for XRandR...\n");
683  }
684 
685  xcb_query_pointer_reply_t *pointerreply;
686  Output *output = NULL;
687  if (!(pointerreply = xcb_query_pointer_reply(conn, pointercookie, NULL))) {
688  ELOG("Could not query pointer position, using first screen\n");
689  output = get_first_output();
690  } else {
691  DLOG("Pointer at %d, %d\n", pointerreply->root_x, pointerreply->root_y);
692  output = get_output_containing(pointerreply->root_x, pointerreply->root_y);
693  if (!output) {
694  ELOG("ERROR: No screen at (%d, %d), starting on the first screen\n",
695  pointerreply->root_x, pointerreply->root_y);
696  output = get_first_output();
697  }
698 
700  }
701 
702  tree_render();
703 
704  /* Create the UNIX domain socket for IPC */
705  int ipc_socket = ipc_create_socket(config.ipc_socket_path);
706  if (ipc_socket == -1) {
707  ELOG("Could not create the IPC socket, IPC disabled\n");
708  } else {
709  free(config.ipc_socket_path);
710  struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
711  ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ);
712  ev_io_start(main_loop, ipc_io);
713  }
714 
715  /* Also handle the UNIX domain sockets passed via socket activation. The
716  * parameter 1 means "remove the environment variables", we don’t want to
717  * pass these to child processes. */
719  if (listen_fds < 0)
720  ELOG("socket activation: Error in sd_listen_fds\n");
721  else if (listen_fds == 0)
722  DLOG("socket activation: no sockets passed\n");
723  else {
724  int flags;
725  for (int fd = SD_LISTEN_FDS_START;
727  fd++) {
728  DLOG("socket activation: also listening on fd %d\n", fd);
729 
730  /* sd_listen_fds() enables FD_CLOEXEC by default.
731  * However, we need to keep the file descriptors open for in-place
732  * restarting, therefore we explicitly disable FD_CLOEXEC. */
733  if ((flags = fcntl(fd, F_GETFD)) < 0 ||
734  fcntl(fd, F_SETFD, flags & ~FD_CLOEXEC) < 0) {
735  ELOG("Could not disable FD_CLOEXEC on fd %d\n", fd);
736  }
737 
738  struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
739  ev_io_init(ipc_io, ipc_new_client, fd, EV_READ);
740  ev_io_start(main_loop, ipc_io);
741  }
742  }
743 
744  /* Set up i3 specific atoms like I3_SOCKET_PATH and I3_CONFIG_PATH */
745  x_set_i3_atoms();
746 
747  struct ev_io *xcb_watcher = scalloc(sizeof(struct ev_io));
748  struct ev_io *xkb = scalloc(sizeof(struct ev_io));
749  struct ev_check *xcb_check = scalloc(sizeof(struct ev_check));
750  struct ev_prepare *xcb_prepare = scalloc(sizeof(struct ev_prepare));
751 
752  ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
753  ev_io_start(main_loop, xcb_watcher);
754 
755 
756  if (xkb_supported) {
757  ev_io_init(xkb, xkb_got_event, ConnectionNumber(xkbdpy), EV_READ);
758  ev_io_start(main_loop, xkb);
759 
760  /* Flush the buffer so that libev can properly get new events */
761  XFlush(xkbdpy);
762  }
763 
764  ev_check_init(xcb_check, xcb_check_cb);
765  ev_check_start(main_loop, xcb_check);
766 
767  ev_prepare_init(xcb_prepare, xcb_prepare_cb);
768  ev_prepare_start(main_loop, xcb_prepare);
769 
770  xcb_flush(conn);
771 
773 
774  struct sigaction action;
775 
776  action.sa_sigaction = handle_signal;
777  action.sa_flags = SA_NODEFER | SA_RESETHAND | SA_SIGINFO;
778  sigemptyset(&action.sa_mask);
779 
780  if (!disable_signalhandler)
782  else {
783  /* Catch all signals with default action "Core", see signal(7) */
784  if (sigaction(SIGQUIT, &action, NULL) == -1 ||
785  sigaction(SIGILL, &action, NULL) == -1 ||
786  sigaction(SIGABRT, &action, NULL) == -1 ||
787  sigaction(SIGFPE, &action, NULL) == -1 ||
788  sigaction(SIGSEGV, &action, NULL) == -1)
789  ELOG("Could not setup signal handler");
790  }
791 
792  /* Catch all signals with default action "Term", see signal(7) */
793  if (sigaction(SIGHUP, &action, NULL) == -1 ||
794  sigaction(SIGINT, &action, NULL) == -1 ||
795  sigaction(SIGALRM, &action, NULL) == -1 ||
796  sigaction(SIGUSR1, &action, NULL) == -1 ||
797  sigaction(SIGUSR2, &action, NULL) == -1)
798  ELOG("Could not setup signal handler");
799 
800  /* Ignore SIGPIPE to survive errors when an IPC client disconnects
801  * while we are sending him a message */
802  signal(SIGPIPE, SIG_IGN);
803 
804  /* Autostarting exec-lines */
805  if (autostart) {
806  struct Autostart *exec;
808  LOG("auto-starting %s\n", exec->command);
810  }
811  }
812 
813  /* Autostarting exec_always-lines */
814  struct Autostart *exec_always;
816  LOG("auto-starting (always!) %s\n", exec_always->command);
817  start_application(exec_always->command, exec_always->no_startup_id);
818  }
819 
820  /* Start i3bar processes for all configured bars */
821  Barconfig *barconfig;
822  TAILQ_FOREACH(barconfig, &barconfigs, configs) {
823  char *command = NULL;
824  sasprintf(&command, "%s --bar_id=%s --socket=\"%s\"",
825  barconfig->i3bar_command ? barconfig->i3bar_command : "i3bar",
826  barconfig->id, current_socketpath);
827  LOG("Starting bar process: %s\n", command);
828  start_application(command, true);
829  free(command);
830  }
831 
832  /* Make sure to destroy the event loop to invoke the cleeanup callbacks
833  * when calling exit() */
834  atexit(i3_exit);
835 
836  ev_loop(main_loop, 0);
837 }