2 * vim:ts=4:sw=4:expandtab
4 * © 2010-2013 Michael Stapelberg
6 * See LICENSE for licensing information
20 #include <security/pam_appl.h>
25 #include <xkbcommon/xkbcommon.h>
26 #include <xkbcommon/xkbcommon-x11.h>
28 #include <cairo/cairo-xcb.h>
33 #include "unlock_indicator.h"
36 #define TSTAMP_N_SECS(n) (n * 1.0)
37 #define TSTAMP_N_MINS(n) (60 * TSTAMP_N_SECS(n))
38 #define START_TIMER(timer_obj, timeout, callback) \
39 timer_obj = start_timer(timer_obj, timeout, callback)
40 #define STOP_TIMER(timer_obj) \
41 timer_obj = stop_timer(timer_obj)
43 typedef void (*ev_callback_t)(EV_P_ ev_timer *w, int revents);
45 /* We need this for libxkbfile */
46 char color[7] = "ffffff";
47 int inactivity_timeout = 30;
48 uint32_t last_resolution[2];
50 static xcb_cursor_t cursor;
51 static pam_handle_t *pam_handle;
52 int input_position = 0;
53 /* Holds the password you enter (in UTF-8). */
54 static char password[512];
55 static bool beep = false;
56 bool debug_mode = false;
57 static bool dpms = false;
58 bool unlock_indicator = true;
59 static bool dont_fork = false;
60 struct ev_loop *main_loop;
61 static struct ev_timer *clear_pam_wrong_timeout;
62 static struct ev_timer *clear_indicator_timeout;
63 static struct ev_timer *dpms_timeout;
64 static struct ev_timer *discard_passwd_timeout;
65 extern unlock_state_t unlock_state;
66 extern pam_state_t pam_state;
68 static struct xkb_state *xkb_state;
69 static struct xkb_context *xkb_context;
70 static struct xkb_keymap *xkb_keymap;
71 static uint8_t xkb_base_event;
72 static uint8_t xkb_base_error;
74 cairo_surface_t *img = NULL;
76 bool ignore_empty_password = false;
77 bool skip_repeated_empty_password = false;
79 /* isutf, u8_dec © 2005 Jeff Bezanson, public domain */
80 #define isutf(c) (((c) & 0xC0) != 0x80)
83 * Decrements i to point to the previous unicode glyph
86 void u8_dec(char *s, int *i) {
87 (void)(isutf(s[--(*i)]) || isutf(s[--(*i)]) || isutf(s[--(*i)]) || --(*i));
90 static void turn_monitors_on(void) {
92 dpms_set_mode(conn, XCB_DPMS_DPMS_MODE_ON);
95 static void turn_monitors_off(void) {
97 dpms_set_mode(conn, XCB_DPMS_DPMS_MODE_OFF);
101 * Loads the XKB keymap from the X11 server and feeds it to xkbcommon.
102 * Necessary so that we can properly let xkbcommon track the keyboard state and
103 * translate keypresses to utf-8.
106 static bool load_keymap(void) {
107 if (xkb_context == NULL) {
108 if ((xkb_context = xkb_context_new(0)) == NULL) {
109 fprintf(stderr, "[i3lock] could not create xkbcommon context\n");
114 xkb_keymap_unref(xkb_keymap);
116 int32_t device_id = xkb_x11_get_core_keyboard_device_id(conn);
117 DEBUG("device = %d\n", device_id);
118 if ((xkb_keymap = xkb_x11_keymap_new_from_device(xkb_context, conn, device_id, 0)) == NULL) {
119 fprintf(stderr, "[i3lock] xkb_x11_keymap_new_from_device failed\n");
123 struct xkb_state *new_state =
124 xkb_x11_state_new_from_device(xkb_keymap, conn, device_id);
125 if (new_state == NULL) {
126 fprintf(stderr, "[i3lock] xkb_x11_state_new_from_device failed\n");
130 xkb_state_unref(xkb_state);
131 xkb_state = new_state;
137 * Clears the memory which stored the password to be a bit safer against
141 static void clear_password_memory(void) {
142 /* A volatile pointer to the password buffer to prevent the compiler from
143 * optimizing this out. */
144 volatile char *vpassword = password;
145 for (int c = 0; c < sizeof(password); c++)
146 /* We store a non-random pattern which consists of the (irrelevant)
147 * index plus (!) the value of the beep variable. This prevents the
148 * compiler from optimizing the calls away, since the value of 'beep'
149 * is not known at compile-time. */
150 vpassword[c] = c + (int)beep;
153 ev_timer* start_timer(ev_timer *timer_obj, ev_tstamp timeout, ev_callback_t callback) {
155 ev_timer_stop(main_loop, timer_obj);
156 ev_timer_set(timer_obj, timeout, 0.);
157 ev_timer_start(main_loop, timer_obj);
159 /* When there is no memory, we just don’t have a timeout. We cannot
160 * exit() here, since that would effectively unlock the screen. */
161 timer_obj = calloc(sizeof(struct ev_timer), 1);
163 ev_timer_init(timer_obj, callback, timeout, 0.);
164 ev_timer_start(main_loop, timer_obj);
170 ev_timer* stop_timer(ev_timer *timer_obj) {
172 ev_timer_stop(main_loop, timer_obj);
179 * Resets pam_state to STATE_PAM_IDLE 2 seconds after an unsuccessful
180 * authentication event.
183 static void clear_pam_wrong(EV_P_ ev_timer *w, int revents) {
184 DEBUG("clearing pam wrong\n");
185 pam_state = STATE_PAM_IDLE;
186 unlock_state = STATE_STARTED;
189 /* Now free this timeout. */
190 STOP_TIMER(clear_pam_wrong_timeout);
193 static void clear_indicator_cb(EV_P_ ev_timer *w, int revents) {
195 STOP_TIMER(clear_indicator_timeout);
198 static void clear_input(void) {
200 clear_password_memory();
201 password[input_position] = '\0';
203 /* Hide the unlock indicator after a bit if the password buffer is
205 START_TIMER(clear_indicator_timeout, 1.0, clear_indicator_cb);
206 unlock_state = STATE_BACKSPACE_ACTIVE;
208 unlock_state = STATE_KEY_PRESSED;
211 static void turn_off_monitors_cb(EV_P_ ev_timer *w, int revents) {
212 if (input_position == 0)
215 STOP_TIMER(dpms_timeout);
218 static void discard_passwd_cb(EV_P_ ev_timer *w, int revents) {
221 STOP_TIMER(discard_passwd_timeout);
224 static void input_done(void) {
225 STOP_TIMER(clear_pam_wrong_timeout);
226 pam_state = STATE_PAM_VERIFY;
229 if (pam_authenticate(pam_handle, 0) == PAM_SUCCESS) {
230 DEBUG("successfully authenticated\n");
231 clear_password_memory();
232 /* Turn the screen on, as it may have been turned off
233 * on release of the 'enter' key. */
239 fprintf(stderr, "Authentication failure\n");
241 pam_state = STATE_PAM_WRONG;
245 /* Clear this state after 2 seconds (unless the user enters another
246 * password during that time). */
247 ev_now_update(main_loop);
248 START_TIMER(clear_pam_wrong_timeout, TSTAMP_N_SECS(2), clear_pam_wrong);
250 /* Cancel the clear_indicator_timeout, it would hide the unlock indicator
252 STOP_TIMER(clear_indicator_timeout);
254 /* beep on authentication failure, if enabled */
262 * Called when the user releases a key. We need to leave the Mode_switch
263 * state when the user releases the Mode_switch key.
266 static void handle_key_release(xcb_key_release_event_t *event) {
267 xkb_state_update_key(xkb_state, event->detail, XKB_KEY_UP);
270 static void redraw_timeout(EV_P_ ev_timer *w, int revents) {
275 static bool skip_without_validation(void) {
276 if (input_position != 0)
279 if (skip_repeated_empty_password || ignore_empty_password)
286 * Handle key presses. Fixes state, then looks up the key symbol for the
287 * given keycode, then looks up the key symbol (as UCS-2), converts it to
288 * UTF-8 and stores it in the password array.
291 static void handle_key_press(xcb_key_press_event_t *event) {
297 ksym = xkb_state_key_get_one_sym(xkb_state, event->detail);
298 ctrl = xkb_state_mod_name_is_active(xkb_state, "Control", XKB_STATE_MODS_DEPRESSED);
299 xkb_state_update_key(xkb_state, event->detail, XKB_KEY_DOWN);
301 /* The buffer will be null-terminated, so n >= 2 for 1 actual character. */
302 memset(buffer, '\0', sizeof(buffer));
303 n = xkb_keysym_to_utf8(ksym, buffer, sizeof(buffer));
307 case XKB_KEY_KP_Enter:
308 case XKB_KEY_XF86ScreenSaver:
309 if (skip_without_validation()) {
313 password[input_position] = '\0';
314 unlock_state = STATE_KEY_PRESSED;
317 skip_repeated_empty_password = true;
320 skip_repeated_empty_password = false;
326 DEBUG("C-u pressed\n");
336 case XKB_KEY_BackSpace:
337 if (input_position == 0)
340 /* decrement input_position to point to the previous glyph */
341 u8_dec(password, &input_position);
342 password[input_position] = '\0';
344 /* Hide the unlock indicator after a bit if the password buffer is
346 START_TIMER(clear_indicator_timeout, 1.0, clear_indicator_cb);
347 unlock_state = STATE_BACKSPACE_ACTIVE;
349 unlock_state = STATE_KEY_PRESSED;
353 if ((input_position + 8) >= sizeof(password))
357 /* FIXME: handle all of these? */
358 printf("is_keypad_key = %d\n", xcb_is_keypad_key(sym));
359 printf("is_private_keypad_key = %d\n", xcb_is_private_keypad_key(sym));
360 printf("xcb_is_cursor_key = %d\n", xcb_is_cursor_key(sym));
361 printf("xcb_is_pf_key = %d\n", xcb_is_pf_key(sym));
362 printf("xcb_is_function_key = %d\n", xcb_is_function_key(sym));
363 printf("xcb_is_misc_function_key = %d\n", xcb_is_misc_function_key(sym));
364 printf("xcb_is_modifier_key = %d\n", xcb_is_modifier_key(sym));
370 /* store it in the password array as UTF-8 */
371 memcpy(password+input_position, buffer, n-1);
372 input_position += n-1;
373 DEBUG("current password = %.*s\n", input_position, password);
375 unlock_state = STATE_KEY_ACTIVE;
377 unlock_state = STATE_KEY_PRESSED;
379 struct ev_timer *timeout = NULL;
380 START_TIMER(timeout, TSTAMP_N_SECS(0.25), redraw_timeout);
381 STOP_TIMER(clear_indicator_timeout);
382 START_TIMER(discard_passwd_timeout, TSTAMP_N_MINS(3), discard_passwd_cb);
386 * A visibility notify event will be received when the visibility (= can the
387 * user view the complete window) changes, so for example when a popup overlays
388 * some area of the i3lock window.
390 * In this case, we raise our window on top so that the popup (or whatever is
391 * hiding us) gets hidden.
394 static void handle_visibility_notify(xcb_connection_t *conn,
395 xcb_visibility_notify_event_t *event) {
396 if (event->state != XCB_VISIBILITY_UNOBSCURED) {
397 uint32_t values[] = { XCB_STACK_MODE_ABOVE };
398 xcb_configure_window(conn, event->window, XCB_CONFIG_WINDOW_STACK_MODE, values);
404 * Called when the keyboard mapping changes. We update our symbols.
406 * We ignore errors — if the new keymap cannot be loaded it’s better if the
407 * screen stays locked and the user intervenes by using killall i3lock.
410 static void process_xkb_event(xcb_generic_event_t *gevent) {
413 uint8_t response_type;
416 xcb_timestamp_t time;
419 xcb_xkb_new_keyboard_notify_event_t new_keyboard_notify;
420 xcb_xkb_map_notify_event_t map_notify;
421 xcb_xkb_state_notify_event_t state_notify;
422 } *event = (union xkb_event*)gevent;
424 DEBUG("process_xkb_event for device %d\n", event->any.deviceID);
426 if (event->any.deviceID != xkb_x11_get_core_keyboard_device_id(conn))
430 * XkbNewKkdNotify and XkbMapNotify together capture all sorts of keymap
431 * updates (e.g. xmodmap, xkbcomp, setxkbmap), with minimal redundent
434 switch (event->any.xkbType) {
435 case XCB_XKB_NEW_KEYBOARD_NOTIFY:
436 if (event->new_keyboard_notify.changed & XCB_XKB_NKN_DETAIL_KEYCODES)
440 case XCB_XKB_MAP_NOTIFY:
444 case XCB_XKB_STATE_NOTIFY:
445 xkb_state_update_mask(xkb_state,
446 event->state_notify.baseMods,
447 event->state_notify.latchedMods,
448 event->state_notify.lockedMods,
449 event->state_notify.baseGroup,
450 event->state_notify.latchedGroup,
451 event->state_notify.lockedGroup);
457 * Called when the properties on the root window change, e.g. when the screen
458 * resolution changes. If so we update the window to cover the whole screen
459 * and also redraw the image, if any.
462 void handle_screen_resize(void) {
463 xcb_get_geometry_cookie_t geomc;
464 xcb_get_geometry_reply_t *geom;
465 geomc = xcb_get_geometry(conn, screen->root);
466 if ((geom = xcb_get_geometry_reply(conn, geomc, 0)) == NULL)
469 if (last_resolution[0] == geom->width &&
470 last_resolution[1] == geom->height) {
475 last_resolution[0] = geom->width;
476 last_resolution[1] = geom->height;
482 uint32_t mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
483 xcb_configure_window(conn, win, mask, last_resolution);
486 xinerama_query_screens();
491 * Callback function for PAM. We only react on password request callbacks.
494 static int conv_callback(int num_msg, const struct pam_message **msg,
495 struct pam_response **resp, void *appdata_ptr)
500 /* PAM expects an array of responses, one for each message */
501 if ((*resp = calloc(num_msg, sizeof(struct pam_response))) == NULL) {
506 for (int c = 0; c < num_msg; c++) {
507 if (msg[c]->msg_style != PAM_PROMPT_ECHO_OFF &&
508 msg[c]->msg_style != PAM_PROMPT_ECHO_ON)
511 /* return code is currently not used but should be set to zero */
512 resp[c]->resp_retcode = 0;
513 if ((resp[c]->resp = strdup(password)) == NULL) {
523 * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
524 * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
527 static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
528 /* empty, because xcb_prepare_cb and xcb_check_cb are used */
532 * Flush before blocking (and waiting for new events)
535 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
540 * Instead of polling the X connection socket we leave this to
541 * xcb_poll_for_event() which knows better than we can ever know.
544 static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
545 xcb_generic_event_t *event;
547 while ((event = xcb_poll_for_event(conn)) != NULL) {
548 if (event->response_type == 0) {
549 xcb_generic_error_t *error = (xcb_generic_error_t*)event;
551 fprintf(stderr, "X11 Error received! sequence 0x%x, error_code = %d\n",
552 error->sequence, error->error_code);
557 /* Strip off the highest bit (set if the event is generated) */
558 int type = (event->response_type & 0x7F);
562 handle_key_press((xcb_key_press_event_t*)event);
565 case XCB_KEY_RELEASE:
566 handle_key_release((xcb_key_release_event_t*)event);
568 /* If this was the backspace or escape key we are back at an
569 * empty input, so turn off the screen if DPMS is enabled, but
570 * only do that after some timeout: maybe user mistyped and
571 * will type again right away */
572 START_TIMER(dpms_timeout, TSTAMP_N_SECS(inactivity_timeout),
573 turn_off_monitors_cb);
576 case XCB_VISIBILITY_NOTIFY:
577 handle_visibility_notify(conn, (xcb_visibility_notify_event_t*)event);
582 /* After the first MapNotify, we never fork again. We don’t
583 * expect to get another MapNotify, but better be sure… */
586 /* In the parent process, we exit */
590 ev_loop_fork(EV_DEFAULT);
594 case XCB_CONFIGURE_NOTIFY:
595 handle_screen_resize();
599 if (type == xkb_base_event)
600 process_xkb_event(event);
608 * This function is called from a fork()ed child and will raise the i3lock
609 * window when the window is obscured, even when the main i3lock process is
610 * blocked due to PAM.
613 static void raise_loop(xcb_window_t window) {
614 xcb_connection_t *conn;
615 xcb_generic_event_t *event;
618 if ((conn = xcb_connect(NULL, &screens)) == NULL ||
619 xcb_connection_has_error(conn))
620 errx(EXIT_FAILURE, "Cannot open display\n");
622 /* We need to know about the window being obscured or getting destroyed. */
623 xcb_change_window_attributes(conn, window, XCB_CW_EVENT_MASK,
625 XCB_EVENT_MASK_VISIBILITY_CHANGE |
626 XCB_EVENT_MASK_STRUCTURE_NOTIFY
630 DEBUG("Watching window 0x%08x\n", window);
631 while ((event = xcb_wait_for_event(conn)) != NULL) {
632 if (event->response_type == 0) {
633 xcb_generic_error_t *error = (xcb_generic_error_t*)event;
634 DEBUG("X11 Error received! sequence 0x%x, error_code = %d\n",
635 error->sequence, error->error_code);
639 /* Strip off the highest bit (set if the event is generated) */
640 int type = (event->response_type & 0x7F);
641 DEBUG("Read event of type %d\n", type);
643 case XCB_VISIBILITY_NOTIFY:
644 handle_visibility_notify(conn, (xcb_visibility_notify_event_t*)event);
646 case XCB_UNMAP_NOTIFY:
647 DEBUG("UnmapNotify for 0x%08x\n", (((xcb_unmap_notify_event_t*)event)->window));
648 if (((xcb_unmap_notify_event_t*)event)->window == window)
651 case XCB_DESTROY_NOTIFY:
652 DEBUG("DestroyNotify for 0x%08x\n", (((xcb_destroy_notify_event_t*)event)->window));
653 if (((xcb_destroy_notify_event_t*)event)->window == window)
657 DEBUG("Unhandled event type %d\n", type);
664 int main(int argc, char *argv[]) {
666 char *image_path = NULL;
668 struct pam_conv conv = {conv_callback, NULL};
669 int curs_choice = CURS_NONE;
672 struct option longopts[] = {
673 {"version", no_argument, NULL, 'v'},
674 {"nofork", no_argument, NULL, 'n'},
675 {"beep", no_argument, NULL, 'b'},
676 {"dpms", no_argument, NULL, 'd'},
677 {"color", required_argument, NULL, 'c'},
678 {"pointer", required_argument, NULL , 'p'},
679 {"debug", no_argument, NULL, 0},
680 {"help", no_argument, NULL, 'h'},
681 {"no-unlock-indicator", no_argument, NULL, 'u'},
682 {"image", required_argument, NULL, 'i'},
683 {"tiling", no_argument, NULL, 't'},
684 {"ignore-empty-password", no_argument, NULL, 'e'},
685 {"inactivity-timeout", required_argument, NULL, 'I'},
686 {NULL, no_argument, NULL, 0}
689 if ((username = getenv("USER")) == NULL)
690 errx(EXIT_FAILURE, "USER environment variable not set, please set it.\n");
692 char *optstring = "hvnbdc:p:ui:teI:";
693 while ((o = getopt_long(argc, argv, optstring, longopts, &optind)) != -1) {
696 errx(EXIT_SUCCESS, "version " VERSION " © 2010-2012 Michael Stapelberg");
708 if (sscanf(optarg, "%d", &time) != 1 || time < 0)
709 errx(EXIT_FAILURE, "invalid timeout, it must be a positive integer\n");
710 inactivity_timeout = time;
716 /* Skip # if present */
720 if (strlen(arg) != 6 || sscanf(arg, "%06[0-9a-fA-F]", color) != 1)
721 errx(EXIT_FAILURE, "color is invalid, it must be given in 3-byte hexadecimal format: rrggbb\n");
726 unlock_indicator = false;
729 image_path = strdup(optarg);
735 if (!strcmp(optarg, "win")) {
736 curs_choice = CURS_WIN;
737 } else if (!strcmp(optarg, "default")) {
738 curs_choice = CURS_DEFAULT;
740 errx(EXIT_FAILURE, "i3lock: Invalid pointer type given. Expected one of \"win\" or \"default\".\n");
744 ignore_empty_password = true;
747 if (strcmp(longopts[optind].name, "debug") == 0)
751 errx(EXIT_FAILURE, "Syntax: i3lock [-v] [-n] [-b] [-d] [-c color] [-u] [-p win|default]"
752 " [-i image.png] [-t] [-e] [-I]"
757 /* We need (relatively) random numbers for highlighting a random part of
758 * the unlock indicator upon keypresses. */
762 ret = pam_start("i3lock", username, &conv, &pam_handle);
763 if (ret != PAM_SUCCESS)
764 errx(EXIT_FAILURE, "PAM: %s", pam_strerror(pam_handle, ret));
766 /* Using mlock() as non-super-user seems only possible in Linux. Users of other
767 * operating systems should use encrypted swap/no swap (or remove the ifdef and
768 * run i3lock as super-user). */
769 #if defined(__linux__)
770 /* Lock the area where we store the password in memory, we don’t want it to
771 * be swapped to disk. Since Linux 2.6.9, this does not require any
772 * privileges, just enough bytes in the RLIMIT_MEMLOCK limit. */
773 if (mlock(password, sizeof(password)) != 0)
774 err(EXIT_FAILURE, "Could not lock page in memory, check RLIMIT_MEMLOCK");
777 /* Double checking that connection is good and operatable with xcb */
779 if ((conn = xcb_connect(NULL, &screennr)) == NULL ||
780 xcb_connection_has_error(conn))
781 errx(EXIT_FAILURE, "Could not connect to X11, maybe you need to set DISPLAY?");
783 if (xkb_x11_setup_xkb_extension(conn,
784 XKB_X11_MIN_MAJOR_XKB_VERSION,
785 XKB_X11_MIN_MINOR_XKB_VERSION,
790 &xkb_base_error) != 1)
791 errx(EXIT_FAILURE, "Could not setup XKB extension.");
793 static const xcb_xkb_map_part_t required_map_parts =
794 (XCB_XKB_MAP_PART_KEY_TYPES |
795 XCB_XKB_MAP_PART_KEY_SYMS |
796 XCB_XKB_MAP_PART_MODIFIER_MAP |
797 XCB_XKB_MAP_PART_EXPLICIT_COMPONENTS |
798 XCB_XKB_MAP_PART_KEY_ACTIONS |
799 XCB_XKB_MAP_PART_VIRTUAL_MODS |
800 XCB_XKB_MAP_PART_VIRTUAL_MOD_MAP);
802 static const xcb_xkb_event_type_t required_events =
803 (XCB_XKB_EVENT_TYPE_NEW_KEYBOARD_NOTIFY |
804 XCB_XKB_EVENT_TYPE_MAP_NOTIFY |
805 XCB_XKB_EVENT_TYPE_STATE_NOTIFY);
807 xcb_xkb_select_events(
809 xkb_x11_get_core_keyboard_device_id(conn),
817 /* When we cannot initially load the keymap, we better exit */
819 errx(EXIT_FAILURE, "Could not load keymap");
822 xinerama_query_screens();
824 /* if DPMS is enabled, check if the X server really supports it */
826 xcb_dpms_capable_cookie_t dpmsc = xcb_dpms_capable(conn);
827 xcb_dpms_capable_reply_t *dpmsr;
828 if ((dpmsr = xcb_dpms_capable_reply(conn, dpmsc, NULL))) {
829 if (!dpmsr->capable) {
831 fprintf(stderr, "Disabling DPMS, X server not DPMS capable\n");
838 screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
840 last_resolution[0] = screen->width_in_pixels;
841 last_resolution[1] = screen->height_in_pixels;
843 xcb_change_window_attributes(conn, screen->root, XCB_CW_EVENT_MASK,
844 (uint32_t[]){ XCB_EVENT_MASK_STRUCTURE_NOTIFY });
847 /* Create a pixmap to render on, fill it with the background color */
848 img = cairo_image_surface_create_from_png(image_path);
849 /* In case loading failed, we just pretend no -i was specified. */
850 if (cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) {
851 fprintf(stderr, "Could not load image \"%s\": %s\n",
852 image_path, cairo_status_to_string(cairo_surface_status(img)));
857 /* Pixmap on which the image is rendered to (if any) */
858 xcb_pixmap_t bg_pixmap = draw_image(last_resolution);
860 /* open the fullscreen window, already with the correct pixmap in place */
861 win = open_fullscreen_window(conn, screen, color, bg_pixmap);
862 xcb_free_pixmap(conn, bg_pixmap);
865 /* The pid == -1 case is intentionally ignored here:
866 * While the child process is useful for preventing other windows from
867 * popping up while i3lock blocks, it is not critical. */
870 close(xcb_get_file_descriptor(conn));
875 cursor = create_cursor(conn, screen, win, curs_choice);
877 grab_pointer_and_keyboard(conn, screen, cursor);
878 /* Load the keymap again to sync the current modifier state. Since we first
879 * loaded the keymap, there might have been changes, but starting from now,
880 * we should get all key presses/releases due to having grabbed the
886 /* Initialize the libev event loop. */
887 main_loop = EV_DEFAULT;
888 if (main_loop == NULL)
889 errx(EXIT_FAILURE, "Could not initialize libev. Bad LIBEV_FLAGS?\n");
891 struct ev_io *xcb_watcher = calloc(sizeof(struct ev_io), 1);
892 struct ev_check *xcb_check = calloc(sizeof(struct ev_check), 1);
893 struct ev_prepare *xcb_prepare = calloc(sizeof(struct ev_prepare), 1);
895 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
896 ev_io_start(main_loop, xcb_watcher);
898 ev_check_init(xcb_check, xcb_check_cb);
899 ev_check_start(main_loop, xcb_check);
901 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
902 ev_prepare_start(main_loop, xcb_prepare);
904 /* Invoke the event callback once to catch all the events which were
905 * received up until now. ev will only pick up new events (when the X11
906 * file descriptor becomes readable). */
907 ev_invoke(main_loop, xcb_check, 0);
908 ev_loop(main_loop, 0);