2 * vim:ts=4:sw=4:expandtab
4 * © 2010-2011 Michael Stapelberg
6 * See LICENSE for licensing information
17 #include <xcb/xcb_keysyms.h>
20 #include <security/pam_appl.h>
21 /* FIXME: can we get rid of this header? */
22 #include <X11/keysym.h>
31 #include <cairo/cairo-xcb.h>
34 #include "keysym2ucs.h"
35 #include "ucs2_to_utf8.h"
39 #define BUTTON_RADIUS 90
40 #define BUTTON_SPACE (BUTTON_RADIUS + 5)
41 #define BUTTON_CENTER (BUTTON_RADIUS + 5)
42 #define BUTTON_DIAMETER (5 * BUTTON_SPACE)
44 static char color[7] = "ffffff";
45 static uint32_t last_resolution[2];
46 static xcb_connection_t *conn;
47 static xcb_window_t win;
48 static xcb_visualtype_t *vistype;
49 static xcb_cursor_t cursor;
50 static xcb_key_symbols_t *symbols;
51 static xcb_screen_t *scr;
52 static pam_handle_t *pam_handle;
53 static int input_position = 0;
54 /* holds the password you enter (in UTF-8) */
55 static char password[512];
56 static bool modeswitch_active = false;
57 static bool iso_level3_shift_active = false;
58 static int modeswitchmask;
59 static int numlockmask;
60 static bool beep = false;
61 static bool debug_mode = false;
62 static bool dpms = false;
63 static bool unlock_indicator = true;
64 static struct ev_loop *main_loop;
65 static struct ev_timer *clear_pam_wrong_timeout;
66 static struct ev_timer *clear_indicator_timeout;
69 STATE_STARTED = 0, /* default state */
70 STATE_KEY_PRESSED = 1, /* key was pressed, show unlock indicator */
71 STATE_KEY_ACTIVE = 2, /* a key was pressed recently, highlight part
72 of the unlock indicator. */
73 STATE_BACKSPACE_ACTIVE = 3 /* backspace was pressed recently, highlight
74 part of the unlock indicator in red. */
78 STATE_PAM_IDLE = 0, /* no PAM interaction at the moment */
79 STATE_PAM_VERIFY = 1, /* currently verifying the password via PAM */
80 STATE_PAM_WRONG = 2 /* the password was wrong */
83 #define DEBUG(fmt, ...) do { \
85 printf("[i3lock-debug] " fmt, ##__VA_ARGS__); \
89 static cairo_surface_t *img = NULL;
90 static bool tile = false;
94 * Draws global image with fill color onto a pixmap with the given
95 * resolution and returns it.
98 static xcb_pixmap_t draw_image(xcb_visualtype_t *vistype, u_int32_t* resolution) {
99 xcb_pixmap_t bg_pixmap = XCB_NONE;
102 bg_pixmap = create_bg_pixmap(conn, scr, resolution, color);
103 /* Initialize cairo */
104 cairo_surface_t *output;
105 output = cairo_xcb_surface_create(conn, bg_pixmap, vistype,
106 resolution[0], resolution[1]);
107 cairo_t *ctx = cairo_create(output);
110 cairo_set_source_surface(ctx, img, 0, 0);
113 /* create a pattern and fill a rectangle as big as the screen */
114 cairo_pattern_t *pattern;
115 pattern = cairo_pattern_create_for_surface(img);
116 cairo_set_source(ctx, pattern);
117 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
118 cairo_rectangle(ctx, 0, 0, resolution[0], resolution[1]);
120 cairo_pattern_destroy(pattern);
124 if (unlock_state >= STATE_KEY_PRESSED && unlock_indicator) {
125 cairo_pattern_t *outer_pat = NULL;
127 outer_pat = cairo_pattern_create_linear(0, 0, 0, BUTTON_DIAMETER);
129 case STATE_PAM_VERIFY:
130 cairo_pattern_add_color_stop_rgb(outer_pat, 0, 139.0/255, 0, 250.0/255);
131 cairo_pattern_add_color_stop_rgb(outer_pat, 1, 51.0/255, 0, 250.0/255);
133 case STATE_PAM_WRONG:
134 cairo_pattern_add_color_stop_rgb(outer_pat, 0, 255.0/250, 139.0/255, 0);
135 cairo_pattern_add_color_stop_rgb(outer_pat, 1, 125.0/255, 51.0/255, 0);
138 cairo_pattern_add_color_stop_rgb(outer_pat, 0, 139.0/255, 125.0/255, 0);
139 cairo_pattern_add_color_stop_rgb(outer_pat, 1, 51.0/255, 125.0/255, 0);
143 /* Draw a (centered) circle with transparent background. */
144 cairo_set_line_width(ctx, 10.0);
146 (resolution[0] / 2) /* x */,
147 (resolution[1] / 2) /* y */,
148 BUTTON_RADIUS /* radius */,
152 /* Use the appropriate color for the different PAM states
153 * (currently verifying, wrong password, or default) */
155 case STATE_PAM_VERIFY:
156 cairo_set_source_rgba(ctx, 0, 114.0/255, 255.0/255, 0.75);
158 case STATE_PAM_WRONG:
159 cairo_set_source_rgba(ctx, 250.0/255, 0, 0, 0.75);
162 cairo_set_source_rgba(ctx, 0, 0, 0, 0.75);
165 cairo_fill_preserve(ctx);
166 cairo_set_source(ctx, outer_pat);
169 /* Draw an inner seperator line. */
170 cairo_set_source_rgb(ctx, 0, 0, 0);
171 cairo_set_line_width(ctx, 2.0);
173 (resolution[0] / 2) /* x */,
174 (resolution[1] / 2) /* y */,
175 BUTTON_RADIUS - 5 /* radius */,
180 cairo_set_line_width(ctx, 10.0);
182 /* Display a (centered) text of the current PAM state. */
185 case STATE_PAM_VERIFY:
188 case STATE_PAM_WRONG:
196 cairo_text_extents_t extents;
199 cairo_set_source_rgb(ctx, 0, 0, 0);
200 cairo_set_font_size(ctx, 28.0);
202 cairo_text_extents(ctx, text, &extents);
203 x = (resolution[0] / 2.0) - ((extents.width / 2) + extents.x_bearing);
204 y = (resolution[1] / 2.0) - ((extents.height / 2) + extents.y_bearing);
206 cairo_move_to(ctx, x, y);
207 cairo_show_text(ctx, text);
208 cairo_close_path(ctx);
211 /* After the user pressed any valid key or the backspace key, we
212 * highlight a random part of the unlock indicator to confirm this
214 if (unlock_state == STATE_KEY_ACTIVE ||
215 unlock_state == STATE_BACKSPACE_ACTIVE) {
216 cairo_new_sub_path(ctx);
217 double highlight_start = (rand() % (int)(2 * M_PI * 100)) / 100.0;
218 DEBUG("Highlighting part %.2f\n", highlight_start);
219 cairo_arc(ctx, resolution[0] / 2 /* x */, resolution[1] / 2 /* y */,
220 BUTTON_RADIUS /* radius */, highlight_start,
221 highlight_start + (M_PI / 3.0));
222 if (unlock_state == STATE_KEY_ACTIVE) {
223 /* For normal keys, we use a lighter green. */
224 outer_pat = cairo_pattern_create_linear(0, 0, 0, BUTTON_DIAMETER);
225 cairo_pattern_add_color_stop_rgb(outer_pat, 0, 139.0/255, 219.0/255, 0);
226 cairo_pattern_add_color_stop_rgb(outer_pat, 1, 51.0/255, 219.0/255, 0);
228 /* For backspace, we use red. */
229 outer_pat = cairo_pattern_create_linear(0, 0, 0, BUTTON_DIAMETER);
230 cairo_pattern_add_color_stop_rgb(outer_pat, 0, 219.0/255, 139.0/255, 0);
231 cairo_pattern_add_color_stop_rgb(outer_pat, 1, 219.0/255, 51.0/255, 0);
233 cairo_set_source(ctx, outer_pat);
236 /* Draw two little separators for the highlighted part of the
237 * unlock indicator. */
238 cairo_set_source_rgb(ctx, 0, 0, 0);
240 (resolution[0] / 2) /* x */,
241 (resolution[1] / 2) /* y */,
242 BUTTON_RADIUS /* radius */,
243 highlight_start /* start */,
244 highlight_start + (M_PI / 128.0) /* end */);
247 (resolution[0] / 2) /* x */,
248 (resolution[1] / 2) /* y */,
249 BUTTON_RADIUS /* radius */,
250 highlight_start + (M_PI / 3.0) /* start */,
251 (highlight_start + (M_PI / 3.0)) + (M_PI / 128.0) /* end */);
256 cairo_surface_destroy(output);
263 * Calls draw_image on a new pixmap and swaps that with the current pixmap
266 static void redraw_screen() {
267 xcb_pixmap_t bg_pixmap = draw_image(vistype, last_resolution);
268 xcb_change_window_attributes(conn, win, XCB_CW_BACK_PIXMAP, (uint32_t[1]){ bg_pixmap });
269 /* XXX: Possible optimization: Only update the area in the middle of the
270 * screen instead of the whole screen. */
271 xcb_clear_area(conn, 0, win, 0, 0, scr->width_in_pixels, scr->height_in_pixels);
272 xcb_free_pixmap(conn, bg_pixmap);
277 * Resets pam_state to STATE_PAM_IDLE 2 seconds after an unsuccesful
278 * authentication event.
281 static void clear_pam_wrong(EV_P_ ev_timer *w, int revents) {
282 pam_state = STATE_PAM_IDLE;
283 unlock_state = STATE_STARTED;
288 * Hides the unlock indicator completely when there is no content in the
292 static void clear_indicator(EV_P_ ev_timer *w, int revents) {
293 DEBUG("Clear indicator\n");
294 unlock_state = STATE_STARTED;
299 * (Re-)starts the clear_indicator timeout. Called after pressing backspace or
300 * after an unsuccessful authentication attempt.
303 static void start_clear_indicator_timeout() {
304 if (clear_indicator_timeout) {
305 ev_timer_stop(main_loop, clear_indicator_timeout);
306 ev_timer_set(clear_indicator_timeout, 1.0, 0.);
307 ev_timer_start(main_loop, clear_indicator_timeout);
309 clear_indicator_timeout = calloc(sizeof(struct ev_timer), 1);
310 ev_timer_init(clear_indicator_timeout, clear_indicator, 1.0, 0.);
311 ev_timer_start(main_loop, clear_indicator_timeout);
315 static void input_done() {
316 if (input_position == 0)
319 if (clear_pam_wrong_timeout) {
320 ev_timer_stop(main_loop, clear_pam_wrong_timeout);
321 clear_pam_wrong_timeout = NULL;
324 pam_state = STATE_PAM_VERIFY;
327 if (pam_authenticate(pam_handle, 0) == PAM_SUCCESS) {
328 printf("successfully authenticated\n");
332 fprintf(stderr, "Authentication failure\n");
334 pam_state = STATE_PAM_WRONG;
337 /* Clear this state after 2 seconds (unless the user enters another
338 * password during that time). */
339 ev_now_update(main_loop);
340 clear_pam_wrong_timeout = calloc(sizeof(struct ev_timer), 1);
341 ev_timer_init(clear_pam_wrong_timeout, clear_pam_wrong, 2.0, 0.);
342 ev_timer_start(main_loop, clear_pam_wrong_timeout);
344 /* beep on authentication failure, if enabled */
352 * Called when the user releases a key. We need to leave the Mode_switch
353 * state when the user releases the Mode_switch key.
356 static void handle_key_release(xcb_key_release_event_t *event) {
357 DEBUG("releasing key %d, state raw = %d, modeswitch_active = %d, iso_level3_shift_active = %d\n",
358 event->detail, event->state, modeswitch_active, iso_level3_shift_active);
360 /* We don’t care about the column here and just use the first symbol. Since
361 * we only check for Mode_switch and ISO_Level3_Shift, this *should* work.
362 * Also, if we would use the current column, we would look in the wrong
364 xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, 0);
365 if (sym == XK_Mode_switch) {
366 //printf("Mode switch disabled\n");
367 modeswitch_active = false;
368 } else if (sym == XK_ISO_Level3_Shift) {
369 iso_level3_shift_active = false;
371 DEBUG("release done. modeswitch_active = %d, iso_level3_shift_active = %d\n",
372 modeswitch_active, iso_level3_shift_active);
375 static void redraw_timeout(EV_P_ ev_timer *w, int revents) {
380 * Handle key presses. Fixes state, then looks up the key symbol for the
381 * given keycode, then looks up the key symbol (as UCS-2), converts it to
382 * UTF-8 and stores it in the password array.
385 static void handle_key_press(xcb_key_press_event_t *event) {
386 DEBUG("keypress %d, state raw = %d, modeswitch_active = %d, iso_level3_shift_active = %d\n",
387 event->detail, event->state, modeswitch_active, iso_level3_shift_active);
389 xcb_keysym_t sym0, sym1, sym;
390 /* For each keycode, there is a list of symbols. The list could look like this:
391 * $ xmodmap -pke | grep 'keycode 38'
392 * keycode 38 = a A adiaeresis Adiaeresis o O
393 * In non-X11 terminology, the symbols for the keycode 38 (the key labeled
394 * with "a" on my keyboard) are "a A ä Ä o O".
395 * Another form to display the same information is using xkbcomp:
396 * $ xkbcomp $DISPLAY /tmp/xkb.dump
397 * Then open /tmp/xkb.dump and search for '\<a\>' (in VIM regexp-language):
399 * symbols[Group1]= [ a, A, o, O ],
400 * symbols[Group2]= [ adiaeresis, Adiaeresis ]
402 * So there are two *groups*, one containing 'a A' and one containing 'ä
403 * Ä'. You can use Mode_switch to switch between these groups. You can use
404 * ISO_Level3_Shift to reach the 'o O' part of the first group (it’s the
405 * same group, just an even higher shift level).
407 * So, using the "logical" XKB information, the following lookup will be
410 * Neither Mode_switch nor ISO_Level3_Shift active: group 1, column 0 and 1
411 * Mode_switch active: group 2, column 0 and 1
412 * ISO_Level3_Shift active: group 1, column 2 and 3
414 * Using the column index which xcb_key_press_lookup_keysym uses (and
415 * xmodmap prints out), the following lookup will be performed:
417 * Neither Mode_switch nor ISO_Level3_Shift active: column 0 and 1
418 * Mode_switch active: column 2 and 3
419 * ISO_Level3_Shift active: column 4 and 5
422 if (modeswitch_active)
424 if (iso_level3_shift_active)
426 sym0 = xcb_key_press_lookup_keysym(symbols, event, base_column);
427 sym1 = xcb_key_press_lookup_keysym(symbols, event, base_column + 1);
430 DEBUG("Mode switch enabled\n");
431 modeswitch_active = true;
433 case XK_ISO_Level3_Shift:
434 DEBUG("ISO_Level3_Shift enabled\n");
435 iso_level3_shift_active = true;
442 password[input_position] = '\0';
446 if (input_position == 0)
449 /* decrement input_position to point to the previous glyph */
450 u8_dec(password, &input_position);
451 password[input_position] = '\0';
453 /* Clear this state after 2 seconds (unless the user enters another
454 * password during that time). */
455 start_clear_indicator_timeout();
456 unlock_state = STATE_BACKSPACE_ACTIVE;
458 unlock_state = STATE_KEY_PRESSED;
459 //printf("new input position = %d, new password = %s\n", input_position, password);
463 if ((input_position + 8) >= sizeof(password))
466 if ((event->state & numlockmask) && xcb_is_keypad_key(sym1)) {
467 /* this key was a keypad key */
468 if ((event->state & XCB_MOD_MASK_SHIFT))
472 if ((event->state & XCB_MOD_MASK_SHIFT))
478 /* FIXME: handle all of these? */
479 printf("is_keypad_key = %d\n", xcb_is_keypad_key(sym));
480 printf("is_private_keypad_key = %d\n", xcb_is_private_keypad_key(sym));
481 printf("xcb_is_cursor_key = %d\n", xcb_is_cursor_key(sym));
482 printf("xcb_is_pf_key = %d\n", xcb_is_pf_key(sym));
483 printf("xcb_is_function_key = %d\n", xcb_is_function_key(sym));
484 printf("xcb_is_misc_function_key = %d\n", xcb_is_misc_function_key(sym));
485 printf("xcb_is_modifier_key = %d\n", xcb_is_modifier_key(sym));
488 if (xcb_is_modifier_key(sym) || xcb_is_cursor_key(sym))
491 DEBUG("resolved to keysym = %c (%d)\n", sym, sym);
493 /* convert the keysym to UCS */
494 uint16_t ucs = keysym2ucs(sym);
495 if ((int16_t)ucs == -1) {
496 fprintf(stderr, "Keysym could not be converted to UCS, skipping\n");
500 /* store the UCS in a string to convert it */
501 uint8_t inp[3] = {(ucs & 0xFF00) >> 8, (ucs & 0xFF), 0};
502 DEBUG("input part = %s\n", inp);
504 /* store it in the password array as UTF-8 */
505 input_position += convert_ucs_to_utf8((char*)inp, password + input_position);
506 password[input_position] = '\0';
507 DEBUG("current password = %s\n", password);
509 unlock_state = STATE_KEY_ACTIVE;
511 unlock_state = STATE_KEY_PRESSED;
513 struct ev_timer *timeout = calloc(sizeof(struct ev_timer), 1);
514 ev_timer_init(timeout, redraw_timeout, 0.25, 0.);
515 ev_timer_start(main_loop, timeout);
517 if (clear_indicator_timeout) {
518 ev_timer_stop(main_loop, clear_indicator_timeout);
519 clear_indicator_timeout = NULL;
524 * A visibility notify event will be received when the visibility (= can the
525 * user view the complete window) changes, so for example when a popup overlays
526 * some area of the i3lock window.
528 * In this case, we raise our window on top so that the popup (or whatever is
529 * hiding us) gets hidden.
532 static void handle_visibility_notify(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.
544 static void handle_mapping_notify(xcb_mapping_notify_event_t *event) {
545 xcb_refresh_keyboard_mapping(symbols, event);
547 modeswitchmask = get_mod_mask(conn, symbols, XK_Mode_switch);
548 numlockmask = get_mod_mask(conn, symbols, XK_Num_Lock);
552 * Called when the properties on the root window change, e.g. when the screen
553 * resolution changes. If so we update the window to cover the whole screen
554 * and also redraw the image, if any.
557 void handle_screen_resize(xcb_visualtype_t *vistype, xcb_window_t win, uint32_t* last_resolution) {
558 xcb_get_geometry_cookie_t geomc;
559 xcb_get_geometry_reply_t *geom;
560 geomc = xcb_get_geometry(conn, scr->root);
561 if ((geom = xcb_get_geometry_reply(conn, geomc, 0)) == NULL) {
565 if (last_resolution[0] == geom->width && last_resolution[1] == geom->height)
568 last_resolution[0] = geom->width;
569 last_resolution[1] = geom->height;
573 xcb_pixmap_t bg_pixmap = draw_image(vistype, last_resolution);
574 xcb_change_window_attributes(conn, win, XCB_CW_BACK_PIXMAP, (uint32_t[1]){ bg_pixmap });
575 xcb_free_pixmap(conn, bg_pixmap);
579 uint32_t mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
580 xcb_configure_window(conn, win, mask, last_resolution);
585 * Callback function for PAM. We only react on password request callbacks.
588 static int conv_callback(int num_msg, const struct pam_message **msg,
589 struct pam_response **resp, void *appdata_ptr)
594 /* PAM expects an array of responses, one for each message */
595 if ((*resp = calloc(num_msg, sizeof(struct pam_message))) == NULL) {
600 for (int c = 0; c < num_msg; c++) {
601 if (msg[c]->msg_style != PAM_PROMPT_ECHO_OFF &&
602 msg[c]->msg_style != PAM_PROMPT_ECHO_ON)
605 /* return code is currently not used but should be set to zero */
606 resp[c]->resp_retcode = 0;
607 if ((resp[c]->resp = strdup(password)) == NULL) {
617 * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
618 * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
621 static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
622 /* empty, because xcb_prepare_cb and xcb_check_cb are used */
626 * Flush before blocking (and waiting for new events)
629 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
634 * Instead of polling the X connection socket we leave this to
635 * xcb_poll_for_event() which knows better than we can ever know.
638 static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
639 xcb_generic_event_t *event;
641 while ((event = xcb_poll_for_event(conn)) != NULL) {
642 if (event->response_type == 0) {
643 xcb_generic_error_t *error = (xcb_generic_error_t*)event;
644 fprintf(stderr, "X11 Error received! sequence 0x%x, error_code = %d\n",
645 error->sequence, error->error_code);
650 /* Strip off the highest bit (set if the event is generated) */
651 int type = (event->response_type & 0x7F);
653 if (type == XCB_KEY_PRESS) {
654 handle_key_press((xcb_key_press_event_t*)event);
658 if (type == XCB_KEY_RELEASE) {
659 handle_key_release((xcb_key_release_event_t*)event);
661 /* If this was the backspace or escape key we are back at an
662 * empty input, so turn off the screen if DPMS is enabled */
663 if (dpms && input_position == 0)
664 dpms_turn_off_screen(conn);
669 if (type == XCB_VISIBILITY_NOTIFY) {
670 handle_visibility_notify((xcb_visibility_notify_event_t*)event);
674 if (type == XCB_MAPPING_NOTIFY) {
675 handle_mapping_notify((xcb_mapping_notify_event_t*)event);
679 if (type == XCB_CONFIGURE_NOTIFY) {
680 handle_screen_resize(vistype, win, last_resolution);
684 printf("WARNING: unhandled event of type %d\n", type);
690 int main(int argc, char *argv[]) {
691 bool dont_fork = false;
694 char *image_path = NULL;
697 struct pam_conv conv = {conv_callback, NULL};
699 int curs_choice = CURS_NONE;
702 struct option longopts[] = {
703 {"version", no_argument, NULL, 'v'},
704 {"nofork", no_argument, NULL, 'n'},
705 {"beep", no_argument, NULL, 'b'},
706 {"dpms", no_argument, NULL, 'd'},
707 {"color", required_argument, NULL, 'c'},
708 {"pointer", required_argument, NULL , 'p'},
709 {"debug", no_argument, NULL, 0},
710 {"help", no_argument, NULL, 'h'},
711 {"no-unlock-indicator", no_argument, NULL, 'u'},
713 {"image", required_argument, NULL, 'i'},
714 {"tiling", no_argument, NULL, 't'},
716 {NULL, no_argument, NULL, 0}
719 if ((username = getenv("USER")) == NULL)
720 errx(1, "USER environment variable not set, please set it.\n");
722 while ((o = getopt_long(argc, argv, "hvnbdc:p:u"
726 , longopts, &optind)) != -1) {
729 errx(EXIT_SUCCESS, "version " VERSION " © 2010-2011 Michael Stapelberg");
742 /* Skip # if present */
746 if (strlen(arg) != 6 || sscanf(arg, "%06[0-9a-fA-F]", color) != 1)
747 errx(1, "color is invalid, color must be given in 6-byte format: rrggbb\n");
752 unlock_indicator = false;
756 image_path = strdup(optarg);
763 if (!strcmp(optarg, "win")) {
764 curs_choice = CURS_WIN;
765 } else if (!strcmp(optarg, "default")) {
766 curs_choice = CURS_DEFAULT;
768 errx(1, "i3lock: Invalid pointer type given. Expected one of \"win\" or \"default\".\n");
772 if (strcmp(longopts[optind].name, "debug") == 0)
776 errx(1, "Syntax: i3lock [-v] [-n] [-b] [-d] [-c color] [-u] [-p win|default]"
778 " [-i image.png] [-t]"
780 " (compiled with NOLIBCAIRO)"
786 /* We need (relatively) random numbers for highlighting a random part of
787 * the unlock indicator upon keypresses. */
791 ret = pam_start("i3lock", username, &conv, &pam_handle);
792 if (ret != PAM_SUCCESS)
793 errx(EXIT_FAILURE, "PAM: %s\n", pam_strerror(pam_handle, ret));
795 /* Initialize connection to X11 */
796 if ((conn = xcb_connect(NULL, &screen)) == NULL ||
797 xcb_connection_has_error(conn))
798 errx(EXIT_FAILURE, "Could not connect to X11, maybe you need to set DISPLAY?");
801 /* In the parent process, we exit */
806 /* if DPMS is enabled, check if the X server really supports it */
808 xcb_dpms_capable_cookie_t dpmsc = xcb_dpms_capable(conn);
809 xcb_dpms_capable_reply_t *dpmsr;
810 if ((dpmsr = xcb_dpms_capable_reply(conn, dpmsc, NULL)) && !dpmsr->capable) {
811 fprintf(stderr, "Disabling DPMS, X server not DPMS capable\n");
816 scr = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
817 vistype = get_root_visual_type(scr);
819 last_resolution[0] = scr->width_in_pixels;
820 last_resolution[1] = scr->height_in_pixels;
825 /* Create a pixmap to render on, fill it with the background color */
826 img = cairo_image_surface_create_from_png(image_path);
830 /* Pixmap on which the image is rendered to (if any) */
831 xcb_pixmap_t bg_pixmap = draw_image(vistype, last_resolution);
833 /* open the fullscreen window, already with the correct pixmap in place */
834 win = open_fullscreen_window(conn, scr, color, bg_pixmap);
835 xcb_free_pixmap(conn, bg_pixmap);
837 cursor = create_cursor(conn, scr, win, curs_choice);
839 grab_pointer_and_keyboard(conn, scr, cursor);
841 symbols = xcb_key_symbols_alloc(conn);
842 modeswitchmask = get_mod_mask(conn, symbols, XK_Mode_switch);
843 numlockmask = get_mod_mask(conn, symbols, XK_Num_Lock);
846 dpms_turn_off_screen(conn);
848 /* Initialize the libev event loop. */
849 main_loop = EV_DEFAULT;
850 if (main_loop == NULL)
851 errx(EXIT_FAILURE, "Could not initialize libev. Bad LIBEV_FLAGS?\n");
853 struct ev_io *xcb_watcher = calloc(sizeof(struct ev_io), 1);
854 struct ev_check *xcb_check = calloc(sizeof(struct ev_check), 1);
855 struct ev_prepare *xcb_prepare = calloc(sizeof(struct ev_prepare), 1);
857 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
858 ev_io_start(main_loop, xcb_watcher);
860 ev_check_init(xcb_check, xcb_check_cb);
861 ev_check_start(main_loop, xcb_check);
863 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
864 ev_prepare_start(main_loop, xcb_prepare);
867 ev_loop(main_loop, 0);