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;
67 int failed_attempts = 0;
68 bool show_failed_attempts = false;
70 static struct xkb_state *xkb_state;
71 static struct xkb_context *xkb_context;
72 static struct xkb_keymap *xkb_keymap;
73 static uint8_t xkb_base_event;
74 static uint8_t xkb_base_error;
76 cairo_surface_t *img = NULL;
78 bool ignore_empty_password = false;
79 bool skip_repeated_empty_password = false;
81 /* isutf, u8_dec © 2005 Jeff Bezanson, public domain */
82 #define isutf(c) (((c) & 0xC0) != 0x80)
85 * Decrements i to point to the previous unicode glyph
88 void u8_dec(char *s, int *i) {
89 (void)(isutf(s[--(*i)]) || isutf(s[--(*i)]) || isutf(s[--(*i)]) || --(*i));
92 static void turn_monitors_on(void) {
94 dpms_set_mode(conn, XCB_DPMS_DPMS_MODE_ON);
97 static void turn_monitors_off(void) {
99 dpms_set_mode(conn, XCB_DPMS_DPMS_MODE_OFF);
103 * Loads the XKB keymap from the X11 server and feeds it to xkbcommon.
104 * Necessary so that we can properly let xkbcommon track the keyboard state and
105 * translate keypresses to utf-8.
108 static bool load_keymap(void) {
109 if (xkb_context == NULL) {
110 if ((xkb_context = xkb_context_new(0)) == NULL) {
111 fprintf(stderr, "[i3lock] could not create xkbcommon context\n");
116 xkb_keymap_unref(xkb_keymap);
118 int32_t device_id = xkb_x11_get_core_keyboard_device_id(conn);
119 DEBUG("device = %d\n", device_id);
120 if ((xkb_keymap = xkb_x11_keymap_new_from_device(xkb_context, conn, device_id, 0)) == NULL) {
121 fprintf(stderr, "[i3lock] xkb_x11_keymap_new_from_device failed\n");
125 struct xkb_state *new_state =
126 xkb_x11_state_new_from_device(xkb_keymap, conn, device_id);
127 if (new_state == NULL) {
128 fprintf(stderr, "[i3lock] xkb_x11_state_new_from_device failed\n");
132 xkb_state_unref(xkb_state);
133 xkb_state = new_state;
139 * Clears the memory which stored the password to be a bit safer against
143 static void clear_password_memory(void) {
144 /* A volatile pointer to the password buffer to prevent the compiler from
145 * optimizing this out. */
146 volatile char *vpassword = password;
147 for (int c = 0; c < sizeof(password); c++)
148 /* We store a non-random pattern which consists of the (irrelevant)
149 * index plus (!) the value of the beep variable. This prevents the
150 * compiler from optimizing the calls away, since the value of 'beep'
151 * is not known at compile-time. */
152 vpassword[c] = c + (int)beep;
155 ev_timer* start_timer(ev_timer *timer_obj, ev_tstamp timeout, ev_callback_t callback) {
157 ev_timer_stop(main_loop, timer_obj);
158 ev_timer_set(timer_obj, timeout, 0.);
159 ev_timer_start(main_loop, timer_obj);
161 /* When there is no memory, we just don’t have a timeout. We cannot
162 * exit() here, since that would effectively unlock the screen. */
163 timer_obj = calloc(sizeof(struct ev_timer), 1);
165 ev_timer_init(timer_obj, callback, timeout, 0.);
166 ev_timer_start(main_loop, timer_obj);
172 ev_timer* stop_timer(ev_timer *timer_obj) {
174 ev_timer_stop(main_loop, timer_obj);
181 * Resets pam_state to STATE_PAM_IDLE 2 seconds after an unsuccessful
182 * authentication event.
185 static void clear_pam_wrong(EV_P_ ev_timer *w, int revents) {
186 DEBUG("clearing pam wrong\n");
187 pam_state = STATE_PAM_IDLE;
188 unlock_state = STATE_STARTED;
191 /* Now free this timeout. */
192 STOP_TIMER(clear_pam_wrong_timeout);
195 static void clear_indicator_cb(EV_P_ ev_timer *w, int revents) {
197 STOP_TIMER(clear_indicator_timeout);
200 static void clear_input(void) {
202 clear_password_memory();
203 password[input_position] = '\0';
205 /* Hide the unlock indicator after a bit if the password buffer is
207 START_TIMER(clear_indicator_timeout, 1.0, clear_indicator_cb);
208 unlock_state = STATE_BACKSPACE_ACTIVE;
210 unlock_state = STATE_KEY_PRESSED;
213 static void turn_off_monitors_cb(EV_P_ ev_timer *w, int revents) {
214 if (input_position == 0)
217 STOP_TIMER(dpms_timeout);
220 static void discard_passwd_cb(EV_P_ ev_timer *w, int revents) {
223 STOP_TIMER(discard_passwd_timeout);
226 static void input_done(void) {
227 STOP_TIMER(clear_pam_wrong_timeout);
228 pam_state = STATE_PAM_VERIFY;
231 if (pam_authenticate(pam_handle, 0) == PAM_SUCCESS) {
232 DEBUG("successfully authenticated\n");
233 clear_password_memory();
234 /* Turn the screen on, as it may have been turned off
235 * on release of the 'enter' key. */
241 fprintf(stderr, "Authentication failure\n");
243 pam_state = STATE_PAM_WRONG;
244 failed_attempts += 1;
248 /* Clear this state after 2 seconds (unless the user enters another
249 * password during that time). */
250 ev_now_update(main_loop);
251 START_TIMER(clear_pam_wrong_timeout, TSTAMP_N_SECS(2), clear_pam_wrong);
253 /* Cancel the clear_indicator_timeout, it would hide the unlock indicator
255 STOP_TIMER(clear_indicator_timeout);
257 /* beep on authentication failure, if enabled */
264 static void redraw_timeout(EV_P_ ev_timer *w, int revents) {
269 static bool skip_without_validation(void) {
270 if (input_position != 0)
273 if (skip_repeated_empty_password || ignore_empty_password)
280 * Handle key presses. Fixes state, then looks up the key symbol for the
281 * given keycode, then looks up the key symbol (as UCS-2), converts it to
282 * UTF-8 and stores it in the password array.
285 static void handle_key_press(xcb_key_press_event_t *event) {
291 ksym = xkb_state_key_get_one_sym(xkb_state, event->detail);
292 ctrl = xkb_state_mod_name_is_active(xkb_state, "Control", XKB_STATE_MODS_DEPRESSED);
294 /* The buffer will be null-terminated, so n >= 2 for 1 actual character. */
295 memset(buffer, '\0', sizeof(buffer));
296 n = xkb_keysym_to_utf8(ksym, buffer, sizeof(buffer));
300 case XKB_KEY_KP_Enter:
301 case XKB_KEY_XF86ScreenSaver:
302 if (pam_state == STATE_PAM_WRONG)
305 if (skip_without_validation()) {
309 password[input_position] = '\0';
310 unlock_state = STATE_KEY_PRESSED;
313 skip_repeated_empty_password = true;
316 skip_repeated_empty_password = false;
322 DEBUG("C-u pressed\n");
332 case XKB_KEY_BackSpace:
333 if (input_position == 0)
336 /* decrement input_position to point to the previous glyph */
337 u8_dec(password, &input_position);
338 password[input_position] = '\0';
340 /* Hide the unlock indicator after a bit if the password buffer is
342 START_TIMER(clear_indicator_timeout, 1.0, clear_indicator_cb);
343 unlock_state = STATE_BACKSPACE_ACTIVE;
345 unlock_state = STATE_KEY_PRESSED;
349 if ((input_position + 8) >= sizeof(password))
353 /* FIXME: handle all of these? */
354 printf("is_keypad_key = %d\n", xcb_is_keypad_key(sym));
355 printf("is_private_keypad_key = %d\n", xcb_is_private_keypad_key(sym));
356 printf("xcb_is_cursor_key = %d\n", xcb_is_cursor_key(sym));
357 printf("xcb_is_pf_key = %d\n", xcb_is_pf_key(sym));
358 printf("xcb_is_function_key = %d\n", xcb_is_function_key(sym));
359 printf("xcb_is_misc_function_key = %d\n", xcb_is_misc_function_key(sym));
360 printf("xcb_is_modifier_key = %d\n", xcb_is_modifier_key(sym));
366 /* store it in the password array as UTF-8 */
367 memcpy(password+input_position, buffer, n-1);
368 input_position += n-1;
369 DEBUG("current password = %.*s\n", input_position, password);
371 unlock_state = STATE_KEY_ACTIVE;
373 unlock_state = STATE_KEY_PRESSED;
375 struct ev_timer *timeout = NULL;
376 START_TIMER(timeout, TSTAMP_N_SECS(0.25), redraw_timeout);
377 STOP_TIMER(clear_indicator_timeout);
378 START_TIMER(discard_passwd_timeout, TSTAMP_N_MINS(3), discard_passwd_cb);
382 * A visibility notify event will be received when the visibility (= can the
383 * user view the complete window) changes, so for example when a popup overlays
384 * some area of the i3lock window.
386 * In this case, we raise our window on top so that the popup (or whatever is
387 * hiding us) gets hidden.
390 static void handle_visibility_notify(xcb_connection_t *conn,
391 xcb_visibility_notify_event_t *event) {
392 if (event->state != XCB_VISIBILITY_UNOBSCURED) {
393 uint32_t values[] = { XCB_STACK_MODE_ABOVE };
394 xcb_configure_window(conn, event->window, XCB_CONFIG_WINDOW_STACK_MODE, values);
400 * Called when the keyboard mapping changes. We update our symbols.
402 * We ignore errors — if the new keymap cannot be loaded it’s better if the
403 * screen stays locked and the user intervenes by using killall i3lock.
406 static void process_xkb_event(xcb_generic_event_t *gevent) {
409 uint8_t response_type;
412 xcb_timestamp_t time;
415 xcb_xkb_new_keyboard_notify_event_t new_keyboard_notify;
416 xcb_xkb_map_notify_event_t map_notify;
417 xcb_xkb_state_notify_event_t state_notify;
418 } *event = (union xkb_event*)gevent;
420 DEBUG("process_xkb_event for device %d\n", event->any.deviceID);
422 if (event->any.deviceID != xkb_x11_get_core_keyboard_device_id(conn))
426 * XkbNewKkdNotify and XkbMapNotify together capture all sorts of keymap
427 * updates (e.g. xmodmap, xkbcomp, setxkbmap), with minimal redundent
430 switch (event->any.xkbType) {
431 case XCB_XKB_NEW_KEYBOARD_NOTIFY:
432 if (event->new_keyboard_notify.changed & XCB_XKB_NKN_DETAIL_KEYCODES)
436 case XCB_XKB_MAP_NOTIFY:
440 case XCB_XKB_STATE_NOTIFY:
441 xkb_state_update_mask(xkb_state,
442 event->state_notify.baseMods,
443 event->state_notify.latchedMods,
444 event->state_notify.lockedMods,
445 event->state_notify.baseGroup,
446 event->state_notify.latchedGroup,
447 event->state_notify.lockedGroup);
453 * Called when the properties on the root window change, e.g. when the screen
454 * resolution changes. If so we update the window to cover the whole screen
455 * and also redraw the image, if any.
458 void handle_screen_resize(void) {
459 xcb_get_geometry_cookie_t geomc;
460 xcb_get_geometry_reply_t *geom;
461 geomc = xcb_get_geometry(conn, screen->root);
462 if ((geom = xcb_get_geometry_reply(conn, geomc, 0)) == NULL)
465 if (last_resolution[0] == geom->width &&
466 last_resolution[1] == geom->height) {
471 last_resolution[0] = geom->width;
472 last_resolution[1] = geom->height;
478 uint32_t mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
479 xcb_configure_window(conn, win, mask, last_resolution);
482 xinerama_query_screens();
487 * Callback function for PAM. We only react on password request callbacks.
490 static int conv_callback(int num_msg, const struct pam_message **msg,
491 struct pam_response **resp, void *appdata_ptr)
496 /* PAM expects an array of responses, one for each message */
497 if ((*resp = calloc(num_msg, sizeof(struct pam_response))) == NULL) {
502 for (int c = 0; c < num_msg; c++) {
503 if (msg[c]->msg_style != PAM_PROMPT_ECHO_OFF &&
504 msg[c]->msg_style != PAM_PROMPT_ECHO_ON)
507 /* return code is currently not used but should be set to zero */
508 resp[c]->resp_retcode = 0;
509 if ((resp[c]->resp = strdup(password)) == NULL) {
519 * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
520 * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
523 static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
524 /* empty, because xcb_prepare_cb and xcb_check_cb are used */
528 * Flush before blocking (and waiting for new events)
531 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
536 * Instead of polling the X connection socket we leave this to
537 * xcb_poll_for_event() which knows better than we can ever know.
540 static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
541 xcb_generic_event_t *event;
543 if (xcb_connection_has_error(conn))
544 errx(EXIT_FAILURE, "X11 connection broke, did your server terminate?\n");
546 while ((event = xcb_poll_for_event(conn)) != NULL) {
547 if (event->response_type == 0) {
548 xcb_generic_error_t *error = (xcb_generic_error_t*)event;
550 fprintf(stderr, "X11 Error received! sequence 0x%x, error_code = %d\n",
551 error->sequence, error->error_code);
556 /* Strip off the highest bit (set if the event is generated) */
557 int type = (event->response_type & 0x7F);
561 handle_key_press((xcb_key_press_event_t*)event);
564 case XCB_KEY_RELEASE:
565 /* If this was the backspace or escape key we are back at an
566 * empty input, so turn off the screen if DPMS is enabled, but
567 * only do that after some timeout: maybe user mistyped and
568 * will type again right away */
569 START_TIMER(dpms_timeout, TSTAMP_N_SECS(inactivity_timeout),
570 turn_off_monitors_cb);
573 case XCB_VISIBILITY_NOTIFY:
574 handle_visibility_notify(conn, (xcb_visibility_notify_event_t*)event);
579 /* After the first MapNotify, we never fork again. We don’t
580 * expect to get another MapNotify, but better be sure… */
583 /* In the parent process, we exit */
587 ev_loop_fork(EV_DEFAULT);
591 case XCB_CONFIGURE_NOTIFY:
592 handle_screen_resize();
596 if (type == xkb_base_event)
597 process_xkb_event(event);
605 * This function is called from a fork()ed child and will raise the i3lock
606 * window when the window is obscured, even when the main i3lock process is
607 * blocked due to PAM.
610 static void raise_loop(xcb_window_t window) {
611 xcb_connection_t *conn;
612 xcb_generic_event_t *event;
615 if ((conn = xcb_connect(NULL, &screens)) == NULL ||
616 xcb_connection_has_error(conn))
617 errx(EXIT_FAILURE, "Cannot open display\n");
619 /* We need to know about the window being obscured or getting destroyed. */
620 xcb_change_window_attributes(conn, window, XCB_CW_EVENT_MASK,
622 XCB_EVENT_MASK_VISIBILITY_CHANGE |
623 XCB_EVENT_MASK_STRUCTURE_NOTIFY
627 DEBUG("Watching window 0x%08x\n", window);
628 while ((event = xcb_wait_for_event(conn)) != NULL) {
629 if (event->response_type == 0) {
630 xcb_generic_error_t *error = (xcb_generic_error_t*)event;
631 DEBUG("X11 Error received! sequence 0x%x, error_code = %d\n",
632 error->sequence, error->error_code);
636 /* Strip off the highest bit (set if the event is generated) */
637 int type = (event->response_type & 0x7F);
638 DEBUG("Read event of type %d\n", type);
640 case XCB_VISIBILITY_NOTIFY:
641 handle_visibility_notify(conn, (xcb_visibility_notify_event_t*)event);
643 case XCB_UNMAP_NOTIFY:
644 DEBUG("UnmapNotify for 0x%08x\n", (((xcb_unmap_notify_event_t*)event)->window));
645 if (((xcb_unmap_notify_event_t*)event)->window == window)
648 case XCB_DESTROY_NOTIFY:
649 DEBUG("DestroyNotify for 0x%08x\n", (((xcb_destroy_notify_event_t*)event)->window));
650 if (((xcb_destroy_notify_event_t*)event)->window == window)
654 DEBUG("Unhandled event type %d\n", type);
661 int main(int argc, char *argv[]) {
663 char *image_path = NULL;
665 struct pam_conv conv = {conv_callback, NULL};
666 int curs_choice = CURS_NONE;
669 struct option longopts[] = {
670 {"version", no_argument, NULL, 'v'},
671 {"nofork", no_argument, NULL, 'n'},
672 {"beep", no_argument, NULL, 'b'},
673 {"dpms", no_argument, NULL, 'd'},
674 {"color", required_argument, NULL, 'c'},
675 {"pointer", required_argument, NULL , 'p'},
676 {"debug", no_argument, NULL, 0},
677 {"help", no_argument, NULL, 'h'},
678 {"no-unlock-indicator", no_argument, NULL, 'u'},
679 {"image", required_argument, NULL, 'i'},
680 {"tiling", no_argument, NULL, 't'},
681 {"ignore-empty-password", no_argument, NULL, 'e'},
682 {"inactivity-timeout", required_argument, NULL, 'I'},
683 {"show-failed-attempts", no_argument, NULL, 'f'},
684 {NULL, no_argument, NULL, 0}
687 if ((username = getenv("USER")) == NULL)
688 errx(EXIT_FAILURE, "USER environment variable not set, please set it.\n");
690 char *optstring = "hvnbdc:p:ui:teI:f";
691 while ((o = getopt_long(argc, argv, optstring, longopts, &optind)) != -1) {
694 errx(EXIT_SUCCESS, "version " VERSION " © 2010-2012 Michael Stapelberg");
706 if (sscanf(optarg, "%d", &time) != 1 || time < 0)
707 errx(EXIT_FAILURE, "invalid timeout, it must be a positive integer\n");
708 inactivity_timeout = time;
714 /* Skip # if present */
718 if (strlen(arg) != 6 || sscanf(arg, "%06[0-9a-fA-F]", color) != 1)
719 errx(EXIT_FAILURE, "color is invalid, it must be given in 3-byte hexadecimal format: rrggbb\n");
724 unlock_indicator = false;
727 image_path = strdup(optarg);
733 if (!strcmp(optarg, "win")) {
734 curs_choice = CURS_WIN;
735 } else if (!strcmp(optarg, "default")) {
736 curs_choice = CURS_DEFAULT;
738 errx(EXIT_FAILURE, "i3lock: Invalid pointer type given. Expected one of \"win\" or \"default\".\n");
742 ignore_empty_password = true;
745 if (strcmp(longopts[optind].name, "debug") == 0)
749 show_failed_attempts = true;
752 errx(EXIT_FAILURE, "Syntax: i3lock [-v] [-n] [-b] [-d] [-c color] [-u] [-p win|default]"
753 " [-i image.png] [-t] [-e] [-I] [-f]"
758 /* We need (relatively) random numbers for highlighting a random part of
759 * the unlock indicator upon keypresses. */
763 ret = pam_start("i3lock", username, &conv, &pam_handle);
764 if (ret != PAM_SUCCESS)
765 errx(EXIT_FAILURE, "PAM: %s", pam_strerror(pam_handle, ret));
767 /* Using mlock() as non-super-user seems only possible in Linux. Users of other
768 * operating systems should use encrypted swap/no swap (or remove the ifdef and
769 * run i3lock as super-user). */
770 #if defined(__linux__)
771 /* Lock the area where we store the password in memory, we don’t want it to
772 * be swapped to disk. Since Linux 2.6.9, this does not require any
773 * privileges, just enough bytes in the RLIMIT_MEMLOCK limit. */
774 if (mlock(password, sizeof(password)) != 0)
775 err(EXIT_FAILURE, "Could not lock page in memory, check RLIMIT_MEMLOCK");
778 /* Double checking that connection is good and operatable with xcb */
780 if ((conn = xcb_connect(NULL, &screennr)) == NULL ||
781 xcb_connection_has_error(conn))
782 errx(EXIT_FAILURE, "Could not connect to X11, maybe you need to set DISPLAY?");
784 if (xkb_x11_setup_xkb_extension(conn,
785 XKB_X11_MIN_MAJOR_XKB_VERSION,
786 XKB_X11_MIN_MINOR_XKB_VERSION,
791 &xkb_base_error) != 1)
792 errx(EXIT_FAILURE, "Could not setup XKB extension.");
794 static const xcb_xkb_map_part_t required_map_parts =
795 (XCB_XKB_MAP_PART_KEY_TYPES |
796 XCB_XKB_MAP_PART_KEY_SYMS |
797 XCB_XKB_MAP_PART_MODIFIER_MAP |
798 XCB_XKB_MAP_PART_EXPLICIT_COMPONENTS |
799 XCB_XKB_MAP_PART_KEY_ACTIONS |
800 XCB_XKB_MAP_PART_VIRTUAL_MODS |
801 XCB_XKB_MAP_PART_VIRTUAL_MOD_MAP);
803 static const xcb_xkb_event_type_t required_events =
804 (XCB_XKB_EVENT_TYPE_NEW_KEYBOARD_NOTIFY |
805 XCB_XKB_EVENT_TYPE_MAP_NOTIFY |
806 XCB_XKB_EVENT_TYPE_STATE_NOTIFY);
808 xcb_xkb_select_events(
810 xkb_x11_get_core_keyboard_device_id(conn),
818 /* When we cannot initially load the keymap, we better exit */
820 errx(EXIT_FAILURE, "Could not load keymap");
823 xinerama_query_screens();
825 /* if DPMS is enabled, check if the X server really supports it */
827 xcb_dpms_capable_cookie_t dpmsc = xcb_dpms_capable(conn);
828 xcb_dpms_capable_reply_t *dpmsr;
829 if ((dpmsr = xcb_dpms_capable_reply(conn, dpmsc, NULL))) {
830 if (!dpmsr->capable) {
832 fprintf(stderr, "Disabling DPMS, X server not DPMS capable\n");
839 screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
841 last_resolution[0] = screen->width_in_pixels;
842 last_resolution[1] = screen->height_in_pixels;
844 xcb_change_window_attributes(conn, screen->root, XCB_CW_EVENT_MASK,
845 (uint32_t[]){ XCB_EVENT_MASK_STRUCTURE_NOTIFY });
848 /* Create a pixmap to render on, fill it with the background color */
849 img = cairo_image_surface_create_from_png(image_path);
850 /* In case loading failed, we just pretend no -i was specified. */
851 if (cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) {
852 fprintf(stderr, "Could not load image \"%s\": %s\n",
853 image_path, cairo_status_to_string(cairo_surface_status(img)));
858 /* Pixmap on which the image is rendered to (if any) */
859 xcb_pixmap_t bg_pixmap = draw_image(last_resolution);
861 /* open the fullscreen window, already with the correct pixmap in place */
862 win = open_fullscreen_window(conn, screen, color, bg_pixmap);
863 xcb_free_pixmap(conn, bg_pixmap);
866 /* The pid == -1 case is intentionally ignored here:
867 * While the child process is useful for preventing other windows from
868 * popping up while i3lock blocks, it is not critical. */
871 close(xcb_get_file_descriptor(conn));
876 cursor = create_cursor(conn, screen, win, curs_choice);
878 grab_pointer_and_keyboard(conn, screen, cursor);
879 /* Load the keymap again to sync the current modifier state. Since we first
880 * loaded the keymap, there might have been changes, but starting from now,
881 * we should get all key presses/releases due to having grabbed the
887 /* Initialize the libev event loop. */
888 main_loop = EV_DEFAULT;
889 if (main_loop == NULL)
890 errx(EXIT_FAILURE, "Could not initialize libev. Bad LIBEV_FLAGS?\n");
892 struct ev_io *xcb_watcher = calloc(sizeof(struct ev_io), 1);
893 struct ev_check *xcb_check = calloc(sizeof(struct ev_check), 1);
894 struct ev_prepare *xcb_prepare = calloc(sizeof(struct ev_prepare), 1);
896 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
897 ev_io_start(main_loop, xcb_watcher);
899 ev_check_init(xcb_check, xcb_check_cb);
900 ev_check_start(main_loop, xcb_check);
902 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
903 ev_prepare_start(main_loop, xcb_prepare);
905 /* Invoke the event callback once to catch all the events which were
906 * received up until now. ev will only pick up new events (when the X11
907 * file descriptor becomes readable). */
908 ev_invoke(main_loop, xcb_check, 0);
909 ev_loop(main_loop, 0);