2 * vim:ts=4:sw=4:expandtab
4 * © 2010-2013 Michael Stapelberg
6 * See LICENSE for licensing information
21 #include <security/pam_appl.h>
26 #include <xkbcommon/xkbcommon.h>
27 #include <xkbcommon/xkbcommon-x11.h>
29 #include <cairo/cairo-xcb.h>
34 #include "unlock_indicator.h"
37 #define TSTAMP_N_SECS(n) (n * 1.0)
38 #define TSTAMP_N_MINS(n) (60 * TSTAMP_N_SECS(n))
39 #define START_TIMER(timer_obj, timeout, callback) \
40 timer_obj = start_timer(timer_obj, timeout, callback)
41 #define STOP_TIMER(timer_obj) \
42 timer_obj = stop_timer(timer_obj)
44 typedef void (*ev_callback_t)(EV_P_ ev_timer *w, int revents);
46 /* We need this for libxkbfile */
47 char color[7] = "ffffff";
48 int inactivity_timeout = 30;
49 uint32_t last_resolution[2];
51 static xcb_cursor_t cursor;
52 static pam_handle_t *pam_handle;
53 int input_position = 0;
54 /* Holds the password you enter (in UTF-8). */
55 static char password[512];
56 static bool beep = false;
57 bool debug_mode = false;
58 static bool dpms = false;
59 bool unlock_indicator = true;
60 static bool dont_fork = false;
61 struct ev_loop *main_loop;
62 static struct ev_timer *clear_pam_wrong_timeout;
63 static struct ev_timer *clear_indicator_timeout;
64 static struct ev_timer *dpms_timeout;
65 static struct ev_timer *discard_passwd_timeout;
66 extern unlock_state_t unlock_state;
67 extern pam_state_t pam_state;
68 int failed_attempts = 0;
69 bool show_failed_attempts = false;
71 static struct xkb_state *xkb_state;
72 static struct xkb_context *xkb_context;
73 static struct xkb_keymap *xkb_keymap;
74 static uint8_t xkb_base_event;
75 static uint8_t xkb_base_error;
77 cairo_surface_t *img = NULL;
79 bool ignore_empty_password = false;
80 bool skip_repeated_empty_password = false;
82 /* isutf, u8_dec © 2005 Jeff Bezanson, public domain */
83 #define isutf(c) (((c) & 0xC0) != 0x80)
86 * Decrements i to point to the previous unicode glyph
89 void u8_dec(char *s, int *i) {
90 (void)(isutf(s[--(*i)]) || isutf(s[--(*i)]) || isutf(s[--(*i)]) || --(*i));
93 static void turn_monitors_on(void) {
95 dpms_set_mode(conn, XCB_DPMS_DPMS_MODE_ON);
98 static void turn_monitors_off(void) {
100 dpms_set_mode(conn, XCB_DPMS_DPMS_MODE_OFF);
104 * Loads the XKB keymap from the X11 server and feeds it to xkbcommon.
105 * Necessary so that we can properly let xkbcommon track the keyboard state and
106 * translate keypresses to utf-8.
109 static bool load_keymap(void) {
110 if (xkb_context == NULL) {
111 if ((xkb_context = xkb_context_new(0)) == NULL) {
112 fprintf(stderr, "[i3lock] could not create xkbcommon context\n");
117 xkb_keymap_unref(xkb_keymap);
119 int32_t device_id = xkb_x11_get_core_keyboard_device_id(conn);
120 DEBUG("device = %d\n", device_id);
121 if ((xkb_keymap = xkb_x11_keymap_new_from_device(xkb_context, conn, device_id, 0)) == NULL) {
122 fprintf(stderr, "[i3lock] xkb_x11_keymap_new_from_device failed\n");
126 struct xkb_state *new_state =
127 xkb_x11_state_new_from_device(xkb_keymap, conn, device_id);
128 if (new_state == NULL) {
129 fprintf(stderr, "[i3lock] xkb_x11_state_new_from_device failed\n");
133 xkb_state_unref(xkb_state);
134 xkb_state = new_state;
140 * Clears the memory which stored the password to be a bit safer against
144 static void clear_password_memory(void) {
145 /* A volatile pointer to the password buffer to prevent the compiler from
146 * optimizing this out. */
147 volatile char *vpassword = password;
148 for (int c = 0; c < sizeof(password); c++)
149 /* We store a non-random pattern which consists of the (irrelevant)
150 * index plus (!) the value of the beep variable. This prevents the
151 * compiler from optimizing the calls away, since the value of 'beep'
152 * is not known at compile-time. */
153 vpassword[c] = c + (int)beep;
156 ev_timer* start_timer(ev_timer *timer_obj, ev_tstamp timeout, ev_callback_t callback) {
158 ev_timer_stop(main_loop, timer_obj);
159 ev_timer_set(timer_obj, timeout, 0.);
160 ev_timer_start(main_loop, timer_obj);
162 /* When there is no memory, we just don’t have a timeout. We cannot
163 * exit() here, since that would effectively unlock the screen. */
164 timer_obj = calloc(sizeof(struct ev_timer), 1);
166 ev_timer_init(timer_obj, callback, timeout, 0.);
167 ev_timer_start(main_loop, timer_obj);
173 ev_timer* stop_timer(ev_timer *timer_obj) {
175 ev_timer_stop(main_loop, timer_obj);
182 * Resets pam_state to STATE_PAM_IDLE 2 seconds after an unsuccessful
183 * authentication event.
186 static void clear_pam_wrong(EV_P_ ev_timer *w, int revents) {
187 DEBUG("clearing pam wrong\n");
188 pam_state = STATE_PAM_IDLE;
189 unlock_state = STATE_STARTED;
192 /* Now free this timeout. */
193 STOP_TIMER(clear_pam_wrong_timeout);
196 static void clear_indicator_cb(EV_P_ ev_timer *w, int revents) {
198 STOP_TIMER(clear_indicator_timeout);
201 static void clear_input(void) {
203 clear_password_memory();
204 password[input_position] = '\0';
206 /* Hide the unlock indicator after a bit if the password buffer is
208 START_TIMER(clear_indicator_timeout, 1.0, clear_indicator_cb);
209 unlock_state = STATE_BACKSPACE_ACTIVE;
211 unlock_state = STATE_KEY_PRESSED;
214 static void turn_off_monitors_cb(EV_P_ ev_timer *w, int revents) {
215 if (input_position == 0)
218 STOP_TIMER(dpms_timeout);
221 static void discard_passwd_cb(EV_P_ ev_timer *w, int revents) {
224 STOP_TIMER(discard_passwd_timeout);
227 static void input_done(void) {
228 STOP_TIMER(clear_pam_wrong_timeout);
229 pam_state = STATE_PAM_VERIFY;
232 if (pam_authenticate(pam_handle, 0) == PAM_SUCCESS) {
233 DEBUG("successfully authenticated\n");
234 clear_password_memory();
235 /* Turn the screen on, as it may have been turned off
236 * on release of the 'enter' key. */
242 fprintf(stderr, "Authentication failure\n");
244 pam_state = STATE_PAM_WRONG;
245 failed_attempts += 1;
249 /* Clear this state after 2 seconds (unless the user enters another
250 * password during that time). */
251 ev_now_update(main_loop);
252 START_TIMER(clear_pam_wrong_timeout, TSTAMP_N_SECS(2), clear_pam_wrong);
254 /* Cancel the clear_indicator_timeout, it would hide the unlock indicator
256 STOP_TIMER(clear_indicator_timeout);
258 /* beep on authentication failure, if enabled */
265 static void redraw_timeout(EV_P_ ev_timer *w, int revents) {
270 static bool skip_without_validation(void) {
271 if (input_position != 0)
274 if (skip_repeated_empty_password || ignore_empty_password)
281 * Handle key presses. Fixes state, then looks up the key symbol for the
282 * given keycode, then looks up the key symbol (as UCS-2), converts it to
283 * UTF-8 and stores it in the password array.
286 static void handle_key_press(xcb_key_press_event_t *event) {
292 ksym = xkb_state_key_get_one_sym(xkb_state, event->detail);
293 ctrl = xkb_state_mod_name_is_active(xkb_state, "Control", XKB_STATE_MODS_DEPRESSED);
295 /* The buffer will be null-terminated, so n >= 2 for 1 actual character. */
296 memset(buffer, '\0', sizeof(buffer));
297 n = xkb_keysym_to_utf8(ksym, buffer, sizeof(buffer));
301 case XKB_KEY_KP_Enter:
302 case XKB_KEY_XF86ScreenSaver:
303 if (pam_state == STATE_PAM_WRONG)
306 if (skip_without_validation()) {
310 password[input_position] = '\0';
311 unlock_state = STATE_KEY_PRESSED;
314 skip_repeated_empty_password = true;
317 skip_repeated_empty_password = false;
323 DEBUG("C-u pressed\n");
333 case XKB_KEY_BackSpace:
334 if (input_position == 0)
337 /* decrement input_position to point to the previous glyph */
338 u8_dec(password, &input_position);
339 password[input_position] = '\0';
341 /* Hide the unlock indicator after a bit if the password buffer is
343 START_TIMER(clear_indicator_timeout, 1.0, clear_indicator_cb);
344 unlock_state = STATE_BACKSPACE_ACTIVE;
346 unlock_state = STATE_KEY_PRESSED;
350 if ((input_position + 8) >= sizeof(password))
354 /* FIXME: handle all of these? */
355 printf("is_keypad_key = %d\n", xcb_is_keypad_key(sym));
356 printf("is_private_keypad_key = %d\n", xcb_is_private_keypad_key(sym));
357 printf("xcb_is_cursor_key = %d\n", xcb_is_cursor_key(sym));
358 printf("xcb_is_pf_key = %d\n", xcb_is_pf_key(sym));
359 printf("xcb_is_function_key = %d\n", xcb_is_function_key(sym));
360 printf("xcb_is_misc_function_key = %d\n", xcb_is_misc_function_key(sym));
361 printf("xcb_is_modifier_key = %d\n", xcb_is_modifier_key(sym));
367 /* store it in the password array as UTF-8 */
368 memcpy(password+input_position, buffer, n-1);
369 input_position += n-1;
370 DEBUG("current password = %.*s\n", input_position, password);
372 unlock_state = STATE_KEY_ACTIVE;
374 unlock_state = STATE_KEY_PRESSED;
376 struct ev_timer *timeout = NULL;
377 START_TIMER(timeout, TSTAMP_N_SECS(0.25), redraw_timeout);
378 STOP_TIMER(clear_indicator_timeout);
379 START_TIMER(discard_passwd_timeout, TSTAMP_N_MINS(3), discard_passwd_cb);
383 * A visibility notify event will be received when the visibility (= can the
384 * user view the complete window) changes, so for example when a popup overlays
385 * some area of the i3lock window.
387 * In this case, we raise our window on top so that the popup (or whatever is
388 * hiding us) gets hidden.
391 static void handle_visibility_notify(xcb_connection_t *conn,
392 xcb_visibility_notify_event_t *event) {
393 if (event->state != XCB_VISIBILITY_UNOBSCURED) {
394 uint32_t values[] = { XCB_STACK_MODE_ABOVE };
395 xcb_configure_window(conn, event->window, XCB_CONFIG_WINDOW_STACK_MODE, values);
401 * Called when the keyboard mapping changes. We update our symbols.
403 * We ignore errors — if the new keymap cannot be loaded it’s better if the
404 * screen stays locked and the user intervenes by using killall i3lock.
407 static void process_xkb_event(xcb_generic_event_t *gevent) {
410 uint8_t response_type;
413 xcb_timestamp_t time;
416 xcb_xkb_new_keyboard_notify_event_t new_keyboard_notify;
417 xcb_xkb_map_notify_event_t map_notify;
418 xcb_xkb_state_notify_event_t state_notify;
419 } *event = (union xkb_event*)gevent;
421 DEBUG("process_xkb_event for device %d\n", event->any.deviceID);
423 if (event->any.deviceID != xkb_x11_get_core_keyboard_device_id(conn))
427 * XkbNewKkdNotify and XkbMapNotify together capture all sorts of keymap
428 * updates (e.g. xmodmap, xkbcomp, setxkbmap), with minimal redundent
431 switch (event->any.xkbType) {
432 case XCB_XKB_NEW_KEYBOARD_NOTIFY:
433 if (event->new_keyboard_notify.changed & XCB_XKB_NKN_DETAIL_KEYCODES)
437 case XCB_XKB_MAP_NOTIFY:
441 case XCB_XKB_STATE_NOTIFY:
442 xkb_state_update_mask(xkb_state,
443 event->state_notify.baseMods,
444 event->state_notify.latchedMods,
445 event->state_notify.lockedMods,
446 event->state_notify.baseGroup,
447 event->state_notify.latchedGroup,
448 event->state_notify.lockedGroup);
454 * Called when the properties on the root window change, e.g. when the screen
455 * resolution changes. If so we update the window to cover the whole screen
456 * and also redraw the image, if any.
459 void handle_screen_resize(void) {
460 xcb_get_geometry_cookie_t geomc;
461 xcb_get_geometry_reply_t *geom;
462 geomc = xcb_get_geometry(conn, screen->root);
463 if ((geom = xcb_get_geometry_reply(conn, geomc, 0)) == NULL)
466 if (last_resolution[0] == geom->width &&
467 last_resolution[1] == geom->height) {
472 last_resolution[0] = geom->width;
473 last_resolution[1] = geom->height;
479 uint32_t mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
480 xcb_configure_window(conn, win, mask, last_resolution);
483 xinerama_query_screens();
488 * Callback function for PAM. We only react on password request callbacks.
491 static int conv_callback(int num_msg, const struct pam_message **msg,
492 struct pam_response **resp, void *appdata_ptr)
497 /* PAM expects an array of responses, one for each message */
498 if ((*resp = calloc(num_msg, sizeof(struct pam_response))) == NULL) {
503 for (int c = 0; c < num_msg; c++) {
504 if (msg[c]->msg_style != PAM_PROMPT_ECHO_OFF &&
505 msg[c]->msg_style != PAM_PROMPT_ECHO_ON)
508 /* return code is currently not used but should be set to zero */
509 resp[c]->resp_retcode = 0;
510 if ((resp[c]->resp = strdup(password)) == NULL) {
520 * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
521 * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
524 static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
525 /* empty, because xcb_prepare_cb and xcb_check_cb are used */
529 * Flush before blocking (and waiting for new events)
532 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
537 * Instead of polling the X connection socket we leave this to
538 * xcb_poll_for_event() which knows better than we can ever know.
541 static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
542 xcb_generic_event_t *event;
544 if (xcb_connection_has_error(conn))
545 errx(EXIT_FAILURE, "X11 connection broke, did your server terminate?\n");
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 /* If this was the backspace or escape key we are back at an
567 * empty input, so turn off the screen if DPMS is enabled, but
568 * only do that after some timeout: maybe user mistyped and
569 * will type again right away */
570 START_TIMER(dpms_timeout, TSTAMP_N_SECS(inactivity_timeout),
571 turn_off_monitors_cb);
574 case XCB_VISIBILITY_NOTIFY:
575 handle_visibility_notify(conn, (xcb_visibility_notify_event_t*)event);
580 /* After the first MapNotify, we never fork again. We don’t
581 * expect to get another MapNotify, but better be sure… */
584 /* In the parent process, we exit */
588 ev_loop_fork(EV_DEFAULT);
592 case XCB_CONFIGURE_NOTIFY:
593 handle_screen_resize();
597 if (type == xkb_base_event)
598 process_xkb_event(event);
606 * This function is called from a fork()ed child and will raise the i3lock
607 * window when the window is obscured, even when the main i3lock process is
608 * blocked due to PAM.
611 static void raise_loop(xcb_window_t window) {
612 xcb_connection_t *conn;
613 xcb_generic_event_t *event;
616 if ((conn = xcb_connect(NULL, &screens)) == NULL ||
617 xcb_connection_has_error(conn))
618 errx(EXIT_FAILURE, "Cannot open display\n");
620 /* We need to know about the window being obscured or getting destroyed. */
621 xcb_change_window_attributes(conn, window, XCB_CW_EVENT_MASK,
623 XCB_EVENT_MASK_VISIBILITY_CHANGE |
624 XCB_EVENT_MASK_STRUCTURE_NOTIFY
628 DEBUG("Watching window 0x%08x\n", window);
629 while ((event = xcb_wait_for_event(conn)) != NULL) {
630 if (event->response_type == 0) {
631 xcb_generic_error_t *error = (xcb_generic_error_t*)event;
632 DEBUG("X11 Error received! sequence 0x%x, error_code = %d\n",
633 error->sequence, error->error_code);
637 /* Strip off the highest bit (set if the event is generated) */
638 int type = (event->response_type & 0x7F);
639 DEBUG("Read event of type %d\n", type);
641 case XCB_VISIBILITY_NOTIFY:
642 handle_visibility_notify(conn, (xcb_visibility_notify_event_t*)event);
644 case XCB_UNMAP_NOTIFY:
645 DEBUG("UnmapNotify for 0x%08x\n", (((xcb_unmap_notify_event_t*)event)->window));
646 if (((xcb_unmap_notify_event_t*)event)->window == window)
649 case XCB_DESTROY_NOTIFY:
650 DEBUG("DestroyNotify for 0x%08x\n", (((xcb_destroy_notify_event_t*)event)->window));
651 if (((xcb_destroy_notify_event_t*)event)->window == window)
655 DEBUG("Unhandled event type %d\n", type);
663 uid_t uid = geteuid();
664 struct passwd *pw = getpwuid(uid);
668 errx(EXIT_FAILURE, "Username not known!\n");
672 int main(int argc, char *argv[]) {
673 char *username = whoami();
674 char *image_path = NULL;
676 struct pam_conv conv = {conv_callback, NULL};
677 int curs_choice = CURS_NONE;
680 struct option longopts[] = {
681 {"version", no_argument, NULL, 'v'},
682 {"nofork", no_argument, NULL, 'n'},
683 {"beep", no_argument, NULL, 'b'},
684 {"dpms", no_argument, NULL, 'd'},
685 {"color", required_argument, NULL, 'c'},
686 {"pointer", required_argument, NULL , 'p'},
687 {"debug", no_argument, NULL, 0},
688 {"help", no_argument, NULL, 'h'},
689 {"no-unlock-indicator", no_argument, NULL, 'u'},
690 {"image", required_argument, NULL, 'i'},
691 {"tiling", no_argument, NULL, 't'},
692 {"ignore-empty-password", no_argument, NULL, 'e'},
693 {"inactivity-timeout", required_argument, NULL, 'I'},
694 {"show-failed-attempts", no_argument, NULL, 'f'},
695 {NULL, no_argument, NULL, 0}
698 char *optstring = "hvnbdc:p:ui:teI:f";
699 while ((o = getopt_long(argc, argv, optstring, longopts, &optind)) != -1) {
702 errx(EXIT_SUCCESS, "version " VERSION " © 2010-2012 Michael Stapelberg");
714 if (sscanf(optarg, "%d", &time) != 1 || time < 0)
715 errx(EXIT_FAILURE, "invalid timeout, it must be a positive integer\n");
716 inactivity_timeout = time;
722 /* Skip # if present */
726 if (strlen(arg) != 6 || sscanf(arg, "%06[0-9a-fA-F]", color) != 1)
727 errx(EXIT_FAILURE, "color is invalid, it must be given in 3-byte hexadecimal format: rrggbb\n");
732 unlock_indicator = false;
735 image_path = strdup(optarg);
741 if (!strcmp(optarg, "win")) {
742 curs_choice = CURS_WIN;
743 } else if (!strcmp(optarg, "default")) {
744 curs_choice = CURS_DEFAULT;
746 errx(EXIT_FAILURE, "i3lock: Invalid pointer type given. Expected one of \"win\" or \"default\".\n");
750 ignore_empty_password = true;
753 if (strcmp(longopts[optind].name, "debug") == 0)
757 show_failed_attempts = true;
760 errx(EXIT_FAILURE, "Syntax: i3lock [-v] [-n] [-b] [-d] [-c color] [-u] [-p win|default]"
761 " [-i image.png] [-t] [-e] [-I] [-f]"
766 /* We need (relatively) random numbers for highlighting a random part of
767 * the unlock indicator upon keypresses. */
771 ret = pam_start("i3lock", username, &conv, &pam_handle);
772 if (ret != PAM_SUCCESS)
773 errx(EXIT_FAILURE, "PAM: %s", pam_strerror(pam_handle, ret));
775 /* Using mlock() as non-super-user seems only possible in Linux. Users of other
776 * operating systems should use encrypted swap/no swap (or remove the ifdef and
777 * run i3lock as super-user). */
778 #if defined(__linux__)
779 /* Lock the area where we store the password in memory, we don’t want it to
780 * be swapped to disk. Since Linux 2.6.9, this does not require any
781 * privileges, just enough bytes in the RLIMIT_MEMLOCK limit. */
782 if (mlock(password, sizeof(password)) != 0)
783 err(EXIT_FAILURE, "Could not lock page in memory, check RLIMIT_MEMLOCK");
786 /* Double checking that connection is good and operatable with xcb */
788 if ((conn = xcb_connect(NULL, &screennr)) == NULL ||
789 xcb_connection_has_error(conn))
790 errx(EXIT_FAILURE, "Could not connect to X11, maybe you need to set DISPLAY?");
792 if (xkb_x11_setup_xkb_extension(conn,
793 XKB_X11_MIN_MAJOR_XKB_VERSION,
794 XKB_X11_MIN_MINOR_XKB_VERSION,
799 &xkb_base_error) != 1)
800 errx(EXIT_FAILURE, "Could not setup XKB extension.");
802 static const xcb_xkb_map_part_t required_map_parts =
803 (XCB_XKB_MAP_PART_KEY_TYPES |
804 XCB_XKB_MAP_PART_KEY_SYMS |
805 XCB_XKB_MAP_PART_MODIFIER_MAP |
806 XCB_XKB_MAP_PART_EXPLICIT_COMPONENTS |
807 XCB_XKB_MAP_PART_KEY_ACTIONS |
808 XCB_XKB_MAP_PART_VIRTUAL_MODS |
809 XCB_XKB_MAP_PART_VIRTUAL_MOD_MAP);
811 static const xcb_xkb_event_type_t required_events =
812 (XCB_XKB_EVENT_TYPE_NEW_KEYBOARD_NOTIFY |
813 XCB_XKB_EVENT_TYPE_MAP_NOTIFY |
814 XCB_XKB_EVENT_TYPE_STATE_NOTIFY);
816 xcb_xkb_select_events(
818 xkb_x11_get_core_keyboard_device_id(conn),
826 /* When we cannot initially load the keymap, we better exit */
828 errx(EXIT_FAILURE, "Could not load keymap");
831 xinerama_query_screens();
833 /* if DPMS is enabled, check if the X server really supports it */
835 xcb_dpms_capable_cookie_t dpmsc = xcb_dpms_capable(conn);
836 xcb_dpms_capable_reply_t *dpmsr;
837 if ((dpmsr = xcb_dpms_capable_reply(conn, dpmsc, NULL))) {
838 if (!dpmsr->capable) {
840 fprintf(stderr, "Disabling DPMS, X server not DPMS capable\n");
847 screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
849 last_resolution[0] = screen->width_in_pixels;
850 last_resolution[1] = screen->height_in_pixels;
852 xcb_change_window_attributes(conn, screen->root, XCB_CW_EVENT_MASK,
853 (uint32_t[]){ XCB_EVENT_MASK_STRUCTURE_NOTIFY });
856 /* Create a pixmap to render on, fill it with the background color */
857 img = cairo_image_surface_create_from_png(image_path);
858 /* In case loading failed, we just pretend no -i was specified. */
859 if (cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) {
860 fprintf(stderr, "Could not load image \"%s\": %s\n",
861 image_path, cairo_status_to_string(cairo_surface_status(img)));
866 /* Pixmap on which the image is rendered to (if any) */
867 xcb_pixmap_t bg_pixmap = draw_image(last_resolution);
869 /* open the fullscreen window, already with the correct pixmap in place */
870 win = open_fullscreen_window(conn, screen, color, bg_pixmap);
871 xcb_free_pixmap(conn, bg_pixmap);
874 /* The pid == -1 case is intentionally ignored here:
875 * While the child process is useful for preventing other windows from
876 * popping up while i3lock blocks, it is not critical. */
879 close(xcb_get_file_descriptor(conn));
884 cursor = create_cursor(conn, screen, win, curs_choice);
886 grab_pointer_and_keyboard(conn, screen, cursor);
887 /* Load the keymap again to sync the current modifier state. Since we first
888 * loaded the keymap, there might have been changes, but starting from now,
889 * we should get all key presses/releases due to having grabbed the
895 /* Initialize the libev event loop. */
896 main_loop = EV_DEFAULT;
897 if (main_loop == NULL)
898 errx(EXIT_FAILURE, "Could not initialize libev. Bad LIBEV_FLAGS?\n");
900 struct ev_io *xcb_watcher = calloc(sizeof(struct ev_io), 1);
901 struct ev_check *xcb_check = calloc(sizeof(struct ev_check), 1);
902 struct ev_prepare *xcb_prepare = calloc(sizeof(struct ev_prepare), 1);
904 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
905 ev_io_start(main_loop, xcb_watcher);
907 ev_check_init(xcb_check, xcb_check_cb);
908 ev_check_start(main_loop, xcb_check);
910 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
911 ev_prepare_start(main_loop, xcb_prepare);
913 /* Invoke the event callback once to catch all the events which were
914 * received up until now. ev will only pick up new events (when the X11
915 * file descriptor becomes readable). */
916 ev_invoke(main_loop, xcb_check, 0);
917 ev_loop(main_loop, 0);