2 * vim:ts=4:sw=4:expandtab
4 * © 2010 Michael Stapelberg
6 * See LICENSE for licensing information
12 #include <sys/types.h>
24 #include <security/pam_appl.h>
30 #include <xkbcommon/xkbcommon.h>
31 #include <xkbcommon/xkbcommon-compose.h>
32 #include <xkbcommon/xkbcommon-x11.h>
34 #include <cairo/cairo-xcb.h>
36 #include <strings.h> /* explicit_bzero(3) */
38 #include <xcb/xcb_aux.h>
43 #include "unlock_indicator.h"
46 #define TSTAMP_N_SECS(n) (n * 1.0)
47 #define TSTAMP_N_MINS(n) (60 * TSTAMP_N_SECS(n))
48 #define START_TIMER(timer_obj, timeout, callback) \
49 timer_obj = start_timer(timer_obj, timeout, callback)
50 #define STOP_TIMER(timer_obj) \
51 timer_obj = stop_timer(timer_obj)
53 typedef void (*ev_callback_t)(EV_P_ ev_timer *w, int revents);
54 static void input_done(void);
56 char color[7] = "ffffff";
57 uint32_t last_resolution[2];
59 static xcb_cursor_t cursor;
61 static pam_handle_t *pam_handle;
63 int input_position = 0;
64 /* Holds the password you enter (in UTF-8). */
65 static char password[512];
66 static bool beep = false;
67 bool debug_mode = false;
68 bool unlock_indicator = true;
69 char *modifier_string = NULL;
70 static bool dont_fork = false;
71 struct ev_loop *main_loop;
72 static struct ev_timer *clear_auth_wrong_timeout;
73 static struct ev_timer *clear_indicator_timeout;
74 static struct ev_timer *discard_passwd_timeout;
75 extern unlock_state_t unlock_state;
76 extern auth_state_t auth_state;
77 int failed_attempts = 0;
78 bool show_failed_attempts = false;
79 bool retry_verification = false;
81 static struct xkb_state *xkb_state;
82 static struct xkb_context *xkb_context;
83 static struct xkb_keymap *xkb_keymap;
84 static struct xkb_compose_table *xkb_compose_table;
85 static struct xkb_compose_state *xkb_compose_state;
86 static uint8_t xkb_base_event;
87 static uint8_t xkb_base_error;
89 cairo_surface_t *img = NULL;
91 bool ignore_empty_password = false;
92 bool skip_repeated_empty_password = false;
94 /* isutf, u8_dec © 2005 Jeff Bezanson, public domain */
95 #define isutf(c) (((c)&0xC0) != 0x80)
98 * Decrements i to point to the previous unicode glyph
101 void u8_dec(char *s, int *i) {
102 (void)(isutf(s[--(*i)]) || isutf(s[--(*i)]) || isutf(s[--(*i)]) || --(*i));
106 * Loads the XKB keymap from the X11 server and feeds it to xkbcommon.
107 * Necessary so that we can properly let xkbcommon track the keyboard state and
108 * translate keypresses to utf-8.
111 static bool load_keymap(void) {
112 if (xkb_context == NULL) {
113 if ((xkb_context = xkb_context_new(0)) == NULL) {
114 fprintf(stderr, "[i3lock] could not create xkbcommon context\n");
119 xkb_keymap_unref(xkb_keymap);
121 int32_t device_id = xkb_x11_get_core_keyboard_device_id(conn);
122 DEBUG("device = %d\n", device_id);
123 if ((xkb_keymap = xkb_x11_keymap_new_from_device(xkb_context, conn, device_id, 0)) == NULL) {
124 fprintf(stderr, "[i3lock] xkb_x11_keymap_new_from_device failed\n");
128 struct xkb_state *new_state =
129 xkb_x11_state_new_from_device(xkb_keymap, conn, device_id);
130 if (new_state == NULL) {
131 fprintf(stderr, "[i3lock] xkb_x11_state_new_from_device failed\n");
135 xkb_state_unref(xkb_state);
136 xkb_state = new_state;
142 * Loads the XKB compose table from the given locale.
145 static bool load_compose_table(const char *locale) {
146 xkb_compose_table_unref(xkb_compose_table);
148 if ((xkb_compose_table = xkb_compose_table_new_from_locale(xkb_context, locale, 0)) == NULL) {
149 fprintf(stderr, "[i3lock] xkb_compose_table_new_from_locale failed\n");
153 struct xkb_compose_state *new_compose_state = xkb_compose_state_new(xkb_compose_table, 0);
154 if (new_compose_state == NULL) {
155 fprintf(stderr, "[i3lock] xkb_compose_state_new failed\n");
159 xkb_compose_state_unref(xkb_compose_state);
160 xkb_compose_state = new_compose_state;
166 * Clears the memory which stored the password to be a bit safer against
170 static void clear_password_memory(void) {
172 /* Use explicit_bzero(3) which was explicitly designed not to be
173 * optimized out by the compiler. */
174 explicit_bzero(password, strlen(password));
176 /* A volatile pointer to the password buffer to prevent the compiler from
177 * optimizing this out. */
178 volatile char *vpassword = password;
179 for (int c = 0; c < sizeof(password); c++)
180 /* We store a non-random pattern which consists of the (irrelevant)
181 * index plus (!) the value of the beep variable. This prevents the
182 * compiler from optimizing the calls away, since the value of 'beep'
183 * is not known at compile-time. */
184 vpassword[c] = c + (int)beep;
188 ev_timer *start_timer(ev_timer *timer_obj, ev_tstamp timeout, ev_callback_t callback) {
190 ev_timer_stop(main_loop, timer_obj);
191 ev_timer_set(timer_obj, timeout, 0.);
192 ev_timer_start(main_loop, timer_obj);
194 /* When there is no memory, we just don’t have a timeout. We cannot
195 * exit() here, since that would effectively unlock the screen. */
196 timer_obj = calloc(sizeof(struct ev_timer), 1);
198 ev_timer_init(timer_obj, callback, timeout, 0.);
199 ev_timer_start(main_loop, timer_obj);
205 ev_timer *stop_timer(ev_timer *timer_obj) {
207 ev_timer_stop(main_loop, timer_obj);
214 * Neccessary calls after ending input via enter or others
217 static void finish_input(void) {
218 password[input_position] = '\0';
219 unlock_state = STATE_KEY_PRESSED;
225 * Resets auth_state to STATE_AUTH_IDLE 2 seconds after an unsuccessful
226 * authentication event.
229 static void clear_auth_wrong(EV_P_ ev_timer *w, int revents) {
230 DEBUG("clearing auth wrong\n");
231 auth_state = STATE_AUTH_IDLE;
234 /* Clear modifier string. */
235 if (modifier_string != NULL) {
236 free(modifier_string);
237 modifier_string = NULL;
240 /* Now free this timeout. */
241 STOP_TIMER(clear_auth_wrong_timeout);
243 /* retry with input done during auth verification */
244 if (retry_verification) {
245 retry_verification = false;
250 static void clear_indicator_cb(EV_P_ ev_timer *w, int revents) {
252 STOP_TIMER(clear_indicator_timeout);
255 static void clear_input(void) {
257 clear_password_memory();
258 password[input_position] = '\0';
261 static void discard_passwd_cb(EV_P_ ev_timer *w, int revents) {
263 STOP_TIMER(discard_passwd_timeout);
266 static void input_done(void) {
267 STOP_TIMER(clear_auth_wrong_timeout);
268 auth_state = STATE_AUTH_VERIFY;
269 unlock_state = STATE_STARTED;
275 if (!(pw = getpwuid(getuid())))
276 errx(1, "unknown uid %u.", getuid());
278 if (auth_userokay(pw->pw_name, NULL, NULL, password) != 0) {
279 DEBUG("successfully authenticated\n");
280 clear_password_memory();
282 ev_break(EV_DEFAULT, EVBREAK_ALL);
286 if (pam_authenticate(pam_handle, 0) == PAM_SUCCESS) {
287 DEBUG("successfully authenticated\n");
288 clear_password_memory();
290 /* PAM credentials should be refreshed, this will for example update any kerberos tickets.
291 * Related to credentials pam_end() needs to be called to cleanup any temporary
292 * credentials like kerberos /tmp/krb5cc_pam_* files which may of been left behind if the
293 * refresh of the credentials failed. */
294 pam_setcred(pam_handle, PAM_REFRESH_CRED);
295 pam_end(pam_handle, PAM_SUCCESS);
297 ev_break(EV_DEFAULT, EVBREAK_ALL);
303 fprintf(stderr, "Authentication failure\n");
305 /* Get state of Caps and Num lock modifiers, to be displayed in
306 * STATE_AUTH_WRONG state */
307 xkb_mod_index_t idx, num_mods;
308 const char *mod_name;
310 num_mods = xkb_keymap_num_mods(xkb_keymap);
312 for (idx = 0; idx < num_mods; idx++) {
313 if (!xkb_state_mod_index_is_active(xkb_state, idx, XKB_STATE_MODS_EFFECTIVE))
316 mod_name = xkb_keymap_mod_get_name(xkb_keymap, idx);
317 if (mod_name == NULL)
320 /* Replace certain xkb names with nicer, human-readable ones. */
321 if (strcmp(mod_name, XKB_MOD_NAME_CAPS) == 0)
322 mod_name = "Caps Lock";
323 else if (strcmp(mod_name, XKB_MOD_NAME_ALT) == 0)
325 else if (strcmp(mod_name, XKB_MOD_NAME_NUM) == 0)
326 mod_name = "Num Lock";
327 else if (strcmp(mod_name, XKB_MOD_NAME_LOGO) == 0)
331 if (modifier_string == NULL) {
332 if (asprintf(&tmp, "%s", mod_name) != -1)
333 modifier_string = tmp;
334 } else if (asprintf(&tmp, "%s, %s", modifier_string, mod_name) != -1) {
335 free(modifier_string);
336 modifier_string = tmp;
340 auth_state = STATE_AUTH_WRONG;
341 failed_attempts += 1;
343 if (unlock_indicator)
346 /* Clear this state after 2 seconds (unless the user enters another
347 * password during that time). */
348 ev_now_update(main_loop);
349 START_TIMER(clear_auth_wrong_timeout, TSTAMP_N_SECS(2), clear_auth_wrong);
351 /* Cancel the clear_indicator_timeout, it would hide the unlock indicator
353 STOP_TIMER(clear_indicator_timeout);
355 /* beep on authentication failure, if enabled */
362 static void redraw_timeout(EV_P_ ev_timer *w, int revents) {
367 static bool skip_without_validation(void) {
368 if (input_position != 0)
371 if (skip_repeated_empty_password || ignore_empty_password)
378 * Handle key presses. Fixes state, then looks up the key symbol for the
379 * given keycode, then looks up the key symbol (as UCS-2), converts it to
380 * UTF-8 and stores it in the password array.
383 static void handle_key_press(xcb_key_press_event_t *event) {
388 bool composed = false;
390 ksym = xkb_state_key_get_one_sym(xkb_state, event->detail);
391 ctrl = xkb_state_mod_name_is_active(xkb_state, XKB_MOD_NAME_CTRL, XKB_STATE_MODS_DEPRESSED);
393 /* The buffer will be null-terminated, so n >= 2 for 1 actual character. */
394 memset(buffer, '\0', sizeof(buffer));
396 if (xkb_compose_state && xkb_compose_state_feed(xkb_compose_state, ksym) == XKB_COMPOSE_FEED_ACCEPTED) {
397 switch (xkb_compose_state_get_status(xkb_compose_state)) {
398 case XKB_COMPOSE_NOTHING:
400 case XKB_COMPOSE_COMPOSING:
402 case XKB_COMPOSE_COMPOSED:
403 /* xkb_compose_state_get_utf8 doesn't include the terminating byte in the return value
404 * as xkb_keysym_to_utf8 does. Adding one makes the variable n consistent. */
405 n = xkb_compose_state_get_utf8(xkb_compose_state, buffer, sizeof(buffer)) + 1;
406 ksym = xkb_compose_state_get_one_sym(xkb_compose_state);
409 case XKB_COMPOSE_CANCELLED:
410 xkb_compose_state_reset(xkb_compose_state);
416 n = xkb_keysym_to_utf8(ksym, buffer, sizeof(buffer));
423 case XKB_KEY_KP_Enter:
424 case XKB_KEY_XF86ScreenSaver:
425 if ((ksym == XKB_KEY_j || ksym == XKB_KEY_m) && !ctrl)
428 if (auth_state == STATE_AUTH_WRONG) {
429 retry_verification = true;
433 if (skip_without_validation()) {
438 skip_repeated_empty_password = true;
441 skip_repeated_empty_password = false;
447 if ((ksym == XKB_KEY_u && ctrl) ||
448 ksym == XKB_KEY_Escape) {
449 DEBUG("C-u pressed\n");
451 /* Also hide the unlock indicator */
452 if (unlock_indicator)
459 case XKB_KEY_KP_Delete:
460 /* Deleting forward doesn’t make sense, as i3lock doesn’t allow you
461 * to move the cursor when entering a password. We need to eat this
462 * key press so that it won’t be treated as part of the password,
467 case XKB_KEY_BackSpace:
468 if (ksym == XKB_KEY_h && !ctrl)
471 if (input_position == 0)
474 /* decrement input_position to point to the previous glyph */
475 u8_dec(password, &input_position);
476 password[input_position] = '\0';
478 /* Hide the unlock indicator after a bit if the password buffer is
480 START_TIMER(clear_indicator_timeout, 1.0, clear_indicator_cb);
481 unlock_state = STATE_BACKSPACE_ACTIVE;
483 unlock_state = STATE_KEY_PRESSED;
487 if ((input_position + 8) >= sizeof(password))
491 /* FIXME: handle all of these? */
492 printf("is_keypad_key = %d\n", xcb_is_keypad_key(sym));
493 printf("is_private_keypad_key = %d\n", xcb_is_private_keypad_key(sym));
494 printf("xcb_is_cursor_key = %d\n", xcb_is_cursor_key(sym));
495 printf("xcb_is_pf_key = %d\n", xcb_is_pf_key(sym));
496 printf("xcb_is_function_key = %d\n", xcb_is_function_key(sym));
497 printf("xcb_is_misc_function_key = %d\n", xcb_is_misc_function_key(sym));
498 printf("xcb_is_modifier_key = %d\n", xcb_is_modifier_key(sym));
504 /* store it in the password array as UTF-8 */
505 memcpy(password + input_position, buffer, n - 1);
506 input_position += n - 1;
507 DEBUG("current password = %.*s\n", input_position, password);
509 if (unlock_indicator) {
510 unlock_state = STATE_KEY_ACTIVE;
512 unlock_state = STATE_KEY_PRESSED;
514 struct ev_timer *timeout = NULL;
515 START_TIMER(timeout, TSTAMP_N_SECS(0.25), redraw_timeout);
516 STOP_TIMER(clear_indicator_timeout);
519 START_TIMER(discard_passwd_timeout, TSTAMP_N_MINS(3), discard_passwd_cb);
523 * A visibility notify event will be received when the visibility (= can the
524 * user view the complete window) changes, so for example when a popup overlays
525 * some area of the i3lock window.
527 * In this case, we raise our window on top so that the popup (or whatever is
528 * hiding us) gets hidden.
531 static void handle_visibility_notify(xcb_connection_t *conn,
532 xcb_visibility_notify_event_t *event) {
533 if (event->state != XCB_VISIBILITY_UNOBSCURED) {
534 uint32_t values[] = {XCB_STACK_MODE_ABOVE};
535 xcb_configure_window(conn, event->window, XCB_CONFIG_WINDOW_STACK_MODE, values);
541 * Called when the keyboard mapping changes. We update our symbols.
543 * We ignore errors — if the new keymap cannot be loaded it’s better if the
544 * screen stays locked and the user intervenes by using killall i3lock.
547 static void process_xkb_event(xcb_generic_event_t *gevent) {
550 uint8_t response_type;
553 xcb_timestamp_t time;
556 xcb_xkb_new_keyboard_notify_event_t new_keyboard_notify;
557 xcb_xkb_map_notify_event_t map_notify;
558 xcb_xkb_state_notify_event_t state_notify;
559 } *event = (union xkb_event *)gevent;
561 DEBUG("process_xkb_event for device %d\n", event->any.deviceID);
563 if (event->any.deviceID != xkb_x11_get_core_keyboard_device_id(conn))
567 * XkbNewKkdNotify and XkbMapNotify together capture all sorts of keymap
568 * updates (e.g. xmodmap, xkbcomp, setxkbmap), with minimal redundent
571 switch (event->any.xkbType) {
572 case XCB_XKB_NEW_KEYBOARD_NOTIFY:
573 if (event->new_keyboard_notify.changed & XCB_XKB_NKN_DETAIL_KEYCODES)
577 case XCB_XKB_MAP_NOTIFY:
581 case XCB_XKB_STATE_NOTIFY:
582 xkb_state_update_mask(xkb_state,
583 event->state_notify.baseMods,
584 event->state_notify.latchedMods,
585 event->state_notify.lockedMods,
586 event->state_notify.baseGroup,
587 event->state_notify.latchedGroup,
588 event->state_notify.lockedGroup);
594 * Called when the properties on the root window change, e.g. when the screen
595 * resolution changes. If so we update the window to cover the whole screen
596 * and also redraw the image, if any.
599 void handle_screen_resize(void) {
600 xcb_get_geometry_cookie_t geomc;
601 xcb_get_geometry_reply_t *geom;
602 geomc = xcb_get_geometry(conn, screen->root);
603 if ((geom = xcb_get_geometry_reply(conn, geomc, 0)) == NULL)
606 if (last_resolution[0] == geom->width &&
607 last_resolution[1] == geom->height) {
612 last_resolution[0] = geom->width;
613 last_resolution[1] = geom->height;
619 uint32_t mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
620 xcb_configure_window(conn, win, mask, last_resolution);
623 xinerama_query_screens();
629 * Callback function for PAM. We only react on password request callbacks.
632 static int conv_callback(int num_msg, const struct pam_message **msg,
633 struct pam_response **resp, void *appdata_ptr) {
637 /* PAM expects an array of responses, one for each message */
638 if ((*resp = calloc(num_msg, sizeof(struct pam_response))) == NULL) {
643 for (int c = 0; c < num_msg; c++) {
644 if (msg[c]->msg_style != PAM_PROMPT_ECHO_OFF &&
645 msg[c]->msg_style != PAM_PROMPT_ECHO_ON)
648 /* return code is currently not used but should be set to zero */
649 resp[c]->resp_retcode = 0;
650 if ((resp[c]->resp = strdup(password)) == NULL) {
661 * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
662 * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
665 static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
666 /* empty, because xcb_prepare_cb and xcb_check_cb are used */
670 * Flush before blocking (and waiting for new events)
673 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
678 * Try closing logind sleep lock fd passed over from xss-lock, in case we're
679 * being run from there.
682 static void maybe_close_sleep_lock_fd(void) {
683 const char *sleep_lock_fd = getenv("XSS_SLEEP_LOCK_FD");
685 if (sleep_lock_fd && *sleep_lock_fd != 0) {
686 long int fd = strtol(sleep_lock_fd, &endptr, 10);
694 * Instead of polling the X connection socket we leave this to
695 * xcb_poll_for_event() which knows better than we can ever know.
698 static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
699 xcb_generic_event_t *event;
701 if (xcb_connection_has_error(conn))
702 errx(EXIT_FAILURE, "X11 connection broke, did your server terminate?\n");
704 while ((event = xcb_poll_for_event(conn)) != NULL) {
705 if (event->response_type == 0) {
706 xcb_generic_error_t *error = (xcb_generic_error_t *)event;
708 fprintf(stderr, "X11 Error received! sequence 0x%x, error_code = %d\n",
709 error->sequence, error->error_code);
714 /* Strip off the highest bit (set if the event is generated) */
715 int type = (event->response_type & 0x7F);
719 handle_key_press((xcb_key_press_event_t *)event);
722 case XCB_VISIBILITY_NOTIFY:
723 handle_visibility_notify(conn, (xcb_visibility_notify_event_t *)event);
727 maybe_close_sleep_lock_fd();
729 /* After the first MapNotify, we never fork again. We don’t
730 * expect to get another MapNotify, but better be sure… */
733 /* In the parent process, we exit */
737 ev_loop_fork(EV_DEFAULT);
741 case XCB_CONFIGURE_NOTIFY:
742 handle_screen_resize();
746 if (type == xkb_base_event)
747 process_xkb_event(event);
755 * This function is called from a fork()ed child and will raise the i3lock
756 * window when the window is obscured, even when the main i3lock process is
757 * blocked due to the authentication backend.
760 static void raise_loop(xcb_window_t window) {
761 xcb_connection_t *conn;
762 xcb_generic_event_t *event;
765 if ((conn = xcb_connect(NULL, &screens)) == NULL ||
766 xcb_connection_has_error(conn))
767 errx(EXIT_FAILURE, "Cannot open display\n");
769 /* We need to know about the window being obscured or getting destroyed. */
770 xcb_change_window_attributes(conn, window, XCB_CW_EVENT_MASK,
772 XCB_EVENT_MASK_VISIBILITY_CHANGE |
773 XCB_EVENT_MASK_STRUCTURE_NOTIFY});
776 DEBUG("Watching window 0x%08x\n", window);
777 while ((event = xcb_wait_for_event(conn)) != NULL) {
778 if (event->response_type == 0) {
779 xcb_generic_error_t *error = (xcb_generic_error_t *)event;
780 DEBUG("X11 Error received! sequence 0x%x, error_code = %d\n",
781 error->sequence, error->error_code);
785 /* Strip off the highest bit (set if the event is generated) */
786 int type = (event->response_type & 0x7F);
787 DEBUG("Read event of type %d\n", type);
789 case XCB_VISIBILITY_NOTIFY:
790 handle_visibility_notify(conn, (xcb_visibility_notify_event_t *)event);
792 case XCB_UNMAP_NOTIFY:
793 DEBUG("UnmapNotify for 0x%08x\n", (((xcb_unmap_notify_event_t *)event)->window));
794 if (((xcb_unmap_notify_event_t *)event)->window == window)
797 case XCB_DESTROY_NOTIFY:
798 DEBUG("DestroyNotify for 0x%08x\n", (((xcb_destroy_notify_event_t *)event)->window));
799 if (((xcb_destroy_notify_event_t *)event)->window == window)
803 DEBUG("Unhandled event type %d\n", type);
810 int main(int argc, char *argv[]) {
813 char *image_path = NULL;
816 struct pam_conv conv = {conv_callback, NULL};
818 int curs_choice = CURS_NONE;
821 struct option longopts[] = {
822 {"version", no_argument, NULL, 'v'},
823 {"nofork", no_argument, NULL, 'n'},
824 {"beep", no_argument, NULL, 'b'},
825 {"dpms", no_argument, NULL, 'd'},
826 {"color", required_argument, NULL, 'c'},
827 {"pointer", required_argument, NULL, 'p'},
828 {"debug", no_argument, NULL, 0},
829 {"help", no_argument, NULL, 'h'},
830 {"no-unlock-indicator", no_argument, NULL, 'u'},
831 {"image", required_argument, NULL, 'i'},
832 {"tiling", no_argument, NULL, 't'},
833 {"ignore-empty-password", no_argument, NULL, 'e'},
834 {"inactivity-timeout", required_argument, NULL, 'I'},
835 {"show-failed-attempts", no_argument, NULL, 'f'},
836 {NULL, no_argument, NULL, 0}};
838 if ((pw = getpwuid(getuid())) == NULL)
839 err(EXIT_FAILURE, "getpwuid() failed");
840 if ((username = pw->pw_name) == NULL)
841 errx(EXIT_FAILURE, "pw->pw_name is NULL.\n");
843 char *optstring = "hvnbdc:p:ui:teI:f";
844 while ((o = getopt_long(argc, argv, optstring, longopts, &longoptind)) != -1) {
847 errx(EXIT_SUCCESS, "version " VERSION " © 2010 Michael Stapelberg");
855 fprintf(stderr, "DPMS support has been removed from i3lock. Please see the manpage i3lock(1).\n");
858 fprintf(stderr, "Inactivity timeout only makes sense with DPMS, which was removed. Please see the manpage i3lock(1).\n");
864 /* Skip # if present */
868 if (strlen(arg) != 6 || sscanf(arg, "%06[0-9a-fA-F]", color) != 1)
869 errx(EXIT_FAILURE, "color is invalid, it must be given in 3-byte hexadecimal format: rrggbb\n");
874 unlock_indicator = false;
877 image_path = strdup(optarg);
883 if (!strcmp(optarg, "win")) {
884 curs_choice = CURS_WIN;
885 } else if (!strcmp(optarg, "default")) {
886 curs_choice = CURS_DEFAULT;
888 errx(EXIT_FAILURE, "i3lock: Invalid pointer type given. Expected one of \"win\" or \"default\".\n");
892 ignore_empty_password = true;
895 if (strcmp(longopts[longoptind].name, "debug") == 0)
899 show_failed_attempts = true;
902 errx(EXIT_FAILURE, "Syntax: i3lock [-v] [-n] [-b] [-d] [-c color] [-u] [-p win|default]"
903 " [-i image.png] [-t] [-e] [-I timeout] [-f]");
907 /* We need (relatively) random numbers for highlighting a random part of
908 * the unlock indicator upon keypresses. */
913 if ((ret = pam_start("i3lock", username, &conv, &pam_handle)) != PAM_SUCCESS)
914 errx(EXIT_FAILURE, "PAM: %s", pam_strerror(pam_handle, ret));
916 if ((ret = pam_set_item(pam_handle, PAM_TTY, getenv("DISPLAY"))) != PAM_SUCCESS)
917 errx(EXIT_FAILURE, "PAM: %s", pam_strerror(pam_handle, ret));
920 /* Using mlock() as non-super-user seems only possible in Linux.
921 * Users of other operating systems should use encrypted swap/no swap
922 * (or remove the ifdef and run i3lock as super-user).
923 * Alas, swap is encrypted by default on OpenBSD so swapping out
924 * is not necessarily an issue. */
925 #if defined(__linux__)
926 /* Lock the area where we store the password in memory, we don’t want it to
927 * be swapped to disk. Since Linux 2.6.9, this does not require any
928 * privileges, just enough bytes in the RLIMIT_MEMLOCK limit. */
929 if (mlock(password, sizeof(password)) != 0)
930 err(EXIT_FAILURE, "Could not lock page in memory, check RLIMIT_MEMLOCK");
933 /* Double checking that connection is good and operatable with xcb */
935 if ((conn = xcb_connect(NULL, &screennr)) == NULL ||
936 xcb_connection_has_error(conn))
937 errx(EXIT_FAILURE, "Could not connect to X11, maybe you need to set DISPLAY?");
939 if (xkb_x11_setup_xkb_extension(conn,
940 XKB_X11_MIN_MAJOR_XKB_VERSION,
941 XKB_X11_MIN_MINOR_XKB_VERSION,
946 &xkb_base_error) != 1)
947 errx(EXIT_FAILURE, "Could not setup XKB extension.");
949 static const xcb_xkb_map_part_t required_map_parts =
950 (XCB_XKB_MAP_PART_KEY_TYPES |
951 XCB_XKB_MAP_PART_KEY_SYMS |
952 XCB_XKB_MAP_PART_MODIFIER_MAP |
953 XCB_XKB_MAP_PART_EXPLICIT_COMPONENTS |
954 XCB_XKB_MAP_PART_KEY_ACTIONS |
955 XCB_XKB_MAP_PART_VIRTUAL_MODS |
956 XCB_XKB_MAP_PART_VIRTUAL_MOD_MAP);
958 static const xcb_xkb_event_type_t required_events =
959 (XCB_XKB_EVENT_TYPE_NEW_KEYBOARD_NOTIFY |
960 XCB_XKB_EVENT_TYPE_MAP_NOTIFY |
961 XCB_XKB_EVENT_TYPE_STATE_NOTIFY);
963 xcb_xkb_select_events(
965 xkb_x11_get_core_keyboard_device_id(conn),
973 /* When we cannot initially load the keymap, we better exit */
975 errx(EXIT_FAILURE, "Could not load keymap");
977 const char *locale = getenv("LC_ALL");
978 if (!locale || !*locale)
979 locale = getenv("LC_CTYPE");
980 if (!locale || !*locale)
981 locale = getenv("LANG");
982 if (!locale || !*locale) {
984 fprintf(stderr, "Can't detect your locale, fallback to C\n");
988 load_compose_table(locale);
991 xinerama_query_screens();
993 screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
995 last_resolution[0] = screen->width_in_pixels;
996 last_resolution[1] = screen->height_in_pixels;
998 xcb_change_window_attributes(conn, screen->root, XCB_CW_EVENT_MASK,
999 (uint32_t[]){XCB_EVENT_MASK_STRUCTURE_NOTIFY});
1002 /* Create a pixmap to render on, fill it with the background color */
1003 img = cairo_image_surface_create_from_png(image_path);
1004 /* In case loading failed, we just pretend no -i was specified. */
1005 if (cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) {
1006 fprintf(stderr, "Could not load image \"%s\": %s\n",
1007 image_path, cairo_status_to_string(cairo_surface_status(img)));
1013 /* Pixmap on which the image is rendered to (if any) */
1014 xcb_pixmap_t bg_pixmap = draw_image(last_resolution);
1016 xcb_window_t stolen_focus = find_focused_window(conn, screen->root);
1018 /* Open the fullscreen window, already with the correct pixmap in place */
1019 win = open_fullscreen_window(conn, screen, color, bg_pixmap);
1020 xcb_free_pixmap(conn, bg_pixmap);
1022 cursor = create_cursor(conn, screen, win, curs_choice);
1024 /* Display the "locking…" message while trying to grab the pointer/keyboard. */
1025 auth_state = STATE_AUTH_LOCK;
1026 if (!grab_pointer_and_keyboard(conn, screen, cursor, 1000)) {
1027 DEBUG("stole focus from X11 window 0x%08x\n", stolen_focus);
1029 /* Set the focus to i3lock, possibly closing context menus which would
1030 * otherwise prevent us from grabbing keyboard/pointer.
1032 * We cannot use set_focused_window because _NET_ACTIVE_WINDOW only
1033 * works for managed windows, but i3lock uses an unmanaged window
1034 * (override_redirect=1). */
1035 xcb_set_input_focus(conn, XCB_INPUT_FOCUS_PARENT /* revert_to */, win, XCB_CURRENT_TIME);
1036 if (!grab_pointer_and_keyboard(conn, screen, cursor, 9000)) {
1037 auth_state = STATE_I3LOCK_LOCK_FAILED;
1040 errx(EXIT_FAILURE, "Cannot grab pointer/keyboard");
1045 /* The pid == -1 case is intentionally ignored here:
1046 * While the child process is useful for preventing other windows from
1047 * popping up while i3lock blocks, it is not critical. */
1050 close(xcb_get_file_descriptor(conn));
1051 maybe_close_sleep_lock_fd();
1056 /* Load the keymap again to sync the current modifier state. Since we first
1057 * loaded the keymap, there might have been changes, but starting from now,
1058 * we should get all key presses/releases due to having grabbed the
1060 (void)load_keymap();
1062 /* Initialize the libev event loop. */
1063 main_loop = EV_DEFAULT;
1064 if (main_loop == NULL)
1065 errx(EXIT_FAILURE, "Could not initialize libev. Bad LIBEV_FLAGS?\n");
1067 /* Explicitly call the screen redraw in case "locking…" message was displayed */
1068 auth_state = STATE_AUTH_IDLE;
1071 struct ev_io *xcb_watcher = calloc(sizeof(struct ev_io), 1);
1072 struct ev_check *xcb_check = calloc(sizeof(struct ev_check), 1);
1073 struct ev_prepare *xcb_prepare = calloc(sizeof(struct ev_prepare), 1);
1075 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
1076 ev_io_start(main_loop, xcb_watcher);
1078 ev_check_init(xcb_check, xcb_check_cb);
1079 ev_check_start(main_loop, xcb_check);
1081 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
1082 ev_prepare_start(main_loop, xcb_prepare);
1084 /* Invoke the event callback once to catch all the events which were
1085 * received up until now. ev will only pick up new events (when the X11
1086 * file descriptor becomes readable). */
1087 ev_invoke(main_loop, xcb_check, 0);
1088 ev_loop(main_loop, 0);
1090 if (stolen_focus == XCB_NONE) {
1094 DEBUG("restoring focus to X11 window 0x%08x\n", stolen_focus);
1095 xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
1096 xcb_ungrab_keyboard(conn, XCB_CURRENT_TIME);
1097 xcb_destroy_window(conn, win);
1098 set_focused_window(conn, screen->root, stolen_focus);