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>
32 #include <cairo/cairo-xcb.h>
35 #include "keysym2ucs.h"
36 #include "ucs2_to_utf8.h"
40 #define BUTTON_RADIUS 90
41 #define BUTTON_SPACE (BUTTON_RADIUS + 5)
42 #define BUTTON_CENTER (BUTTON_RADIUS + 5)
43 #define BUTTON_DIAMETER (5 * BUTTON_SPACE)
45 static char color[7] = "ffffff";
46 static uint32_t last_resolution[2];
47 static xcb_connection_t *conn;
48 static xcb_window_t win;
49 static xcb_visualtype_t *vistype;
50 static xcb_cursor_t cursor;
51 static xcb_key_symbols_t *symbols;
52 static xcb_screen_t *scr;
53 static pam_handle_t *pam_handle;
54 static int input_position = 0;
55 /* Holds the password you enter (in UTF-8). */
56 static char password[512];
57 static bool modeswitch_active = false;
58 static bool iso_level3_shift_active = false;
59 static bool iso_level5_shift_active = false;
60 static int modeswitchmask;
61 static int numlockmask;
62 static bool beep = false;
63 static bool debug_mode = false;
64 static bool dpms = false;
65 static bool unlock_indicator = true;
66 static struct ev_loop *main_loop;
67 static struct ev_timer *clear_pam_wrong_timeout;
68 static struct ev_timer *clear_indicator_timeout;
71 STATE_STARTED = 0, /* default state */
72 STATE_KEY_PRESSED = 1, /* key was pressed, show unlock indicator */
73 STATE_KEY_ACTIVE = 2, /* a key was pressed recently, highlight part
74 of the unlock indicator. */
75 STATE_BACKSPACE_ACTIVE = 3 /* backspace was pressed recently, highlight
76 part of the unlock indicator in red. */
80 STATE_PAM_IDLE = 0, /* no PAM interaction at the moment */
81 STATE_PAM_VERIFY = 1, /* currently verifying the password via PAM */
82 STATE_PAM_WRONG = 2 /* the password was wrong */
85 #define DEBUG(fmt, ...) do { \
87 printf("[i3lock-debug] " fmt, ##__VA_ARGS__); \
91 static cairo_surface_t *img = NULL;
92 static bool tile = false;
96 * Clears the memory which stored the password to be a bit safer against
100 static void clear_password_memory() {
101 /* A volatile pointer to the password buffer to prevent the compiler from
102 * optimizing this out. */
103 volatile char *vpassword = password;
104 for (int c = 0; c < sizeof(password); c++)
105 /* We store a non-random pattern which consists of the (irrelevant)
106 * index plus (!) the value of the beep variable. This prevents the
107 * compiler from optimizing the calls away, since the value of 'beep'
108 * is not known at compile-time. */
109 vpassword[c] = c + (int)beep;
113 * Draws global image with fill color onto a pixmap with the given
114 * resolution and returns it.
117 static xcb_pixmap_t draw_image(xcb_visualtype_t *vistype, u_int32_t* resolution) {
118 xcb_pixmap_t bg_pixmap = XCB_NONE;
121 bg_pixmap = create_bg_pixmap(conn, scr, resolution, color);
122 /* Initialize cairo */
123 cairo_surface_t *output;
124 output = cairo_xcb_surface_create(conn, bg_pixmap, vistype,
125 resolution[0], resolution[1]);
126 cairo_t *ctx = cairo_create(output);
129 cairo_set_source_surface(ctx, img, 0, 0);
132 /* create a pattern and fill a rectangle as big as the screen */
133 cairo_pattern_t *pattern;
134 pattern = cairo_pattern_create_for_surface(img);
135 cairo_set_source(ctx, pattern);
136 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
137 cairo_rectangle(ctx, 0, 0, resolution[0], resolution[1]);
139 cairo_pattern_destroy(pattern);
143 if (unlock_state >= STATE_KEY_PRESSED && unlock_indicator) {
144 cairo_pattern_t *outer_pat = NULL;
146 outer_pat = cairo_pattern_create_linear(0, 0, 0, BUTTON_DIAMETER);
148 case STATE_PAM_VERIFY:
149 cairo_pattern_add_color_stop_rgb(outer_pat, 0, 139.0/255, 0, 250.0/255);
150 cairo_pattern_add_color_stop_rgb(outer_pat, 1, 51.0/255, 0, 250.0/255);
152 case STATE_PAM_WRONG:
153 cairo_pattern_add_color_stop_rgb(outer_pat, 0, 255.0/250, 139.0/255, 0);
154 cairo_pattern_add_color_stop_rgb(outer_pat, 1, 125.0/255, 51.0/255, 0);
157 cairo_pattern_add_color_stop_rgb(outer_pat, 0, 139.0/255, 125.0/255, 0);
158 cairo_pattern_add_color_stop_rgb(outer_pat, 1, 51.0/255, 125.0/255, 0);
162 /* Draw a (centered) circle with transparent background. */
163 cairo_set_line_width(ctx, 10.0);
165 (resolution[0] / 2) /* x */,
166 (resolution[1] / 2) /* y */,
167 BUTTON_RADIUS /* radius */,
171 /* Use the appropriate color for the different PAM states
172 * (currently verifying, wrong password, or default) */
174 case STATE_PAM_VERIFY:
175 cairo_set_source_rgba(ctx, 0, 114.0/255, 255.0/255, 0.75);
177 case STATE_PAM_WRONG:
178 cairo_set_source_rgba(ctx, 250.0/255, 0, 0, 0.75);
181 cairo_set_source_rgba(ctx, 0, 0, 0, 0.75);
184 cairo_fill_preserve(ctx);
185 cairo_set_source(ctx, outer_pat);
188 /* Draw an inner seperator line. */
189 cairo_set_source_rgb(ctx, 0, 0, 0);
190 cairo_set_line_width(ctx, 2.0);
192 (resolution[0] / 2) /* x */,
193 (resolution[1] / 2) /* y */,
194 BUTTON_RADIUS - 5 /* radius */,
199 cairo_set_line_width(ctx, 10.0);
201 /* Display a (centered) text of the current PAM state. */
204 case STATE_PAM_VERIFY:
207 case STATE_PAM_WRONG:
215 cairo_text_extents_t extents;
218 cairo_set_source_rgb(ctx, 0, 0, 0);
219 cairo_set_font_size(ctx, 28.0);
221 cairo_text_extents(ctx, text, &extents);
222 x = (resolution[0] / 2.0) - ((extents.width / 2) + extents.x_bearing);
223 y = (resolution[1] / 2.0) - ((extents.height / 2) + extents.y_bearing);
225 cairo_move_to(ctx, x, y);
226 cairo_show_text(ctx, text);
227 cairo_close_path(ctx);
230 /* After the user pressed any valid key or the backspace key, we
231 * highlight a random part of the unlock indicator to confirm this
233 if (unlock_state == STATE_KEY_ACTIVE ||
234 unlock_state == STATE_BACKSPACE_ACTIVE) {
235 cairo_new_sub_path(ctx);
236 double highlight_start = (rand() % (int)(2 * M_PI * 100)) / 100.0;
237 DEBUG("Highlighting part %.2f\n", highlight_start);
238 cairo_arc(ctx, resolution[0] / 2 /* x */, resolution[1] / 2 /* y */,
239 BUTTON_RADIUS /* radius */, highlight_start,
240 highlight_start + (M_PI / 3.0));
241 if (unlock_state == STATE_KEY_ACTIVE) {
242 /* For normal keys, we use a lighter green. */
243 outer_pat = cairo_pattern_create_linear(0, 0, 0, BUTTON_DIAMETER);
244 cairo_pattern_add_color_stop_rgb(outer_pat, 0, 139.0/255, 219.0/255, 0);
245 cairo_pattern_add_color_stop_rgb(outer_pat, 1, 51.0/255, 219.0/255, 0);
247 /* For backspace, we use red. */
248 outer_pat = cairo_pattern_create_linear(0, 0, 0, BUTTON_DIAMETER);
249 cairo_pattern_add_color_stop_rgb(outer_pat, 0, 219.0/255, 139.0/255, 0);
250 cairo_pattern_add_color_stop_rgb(outer_pat, 1, 219.0/255, 51.0/255, 0);
252 cairo_set_source(ctx, outer_pat);
255 /* Draw two little separators for the highlighted part of the
256 * unlock indicator. */
257 cairo_set_source_rgb(ctx, 0, 0, 0);
259 (resolution[0] / 2) /* x */,
260 (resolution[1] / 2) /* y */,
261 BUTTON_RADIUS /* radius */,
262 highlight_start /* start */,
263 highlight_start + (M_PI / 128.0) /* end */);
266 (resolution[0] / 2) /* x */,
267 (resolution[1] / 2) /* y */,
268 BUTTON_RADIUS /* radius */,
269 highlight_start + (M_PI / 3.0) /* start */,
270 (highlight_start + (M_PI / 3.0)) + (M_PI / 128.0) /* end */);
275 cairo_surface_destroy(output);
282 * Calls draw_image on a new pixmap and swaps that with the current pixmap
285 static void redraw_screen() {
286 xcb_pixmap_t bg_pixmap = draw_image(vistype, last_resolution);
287 xcb_change_window_attributes(conn, win, XCB_CW_BACK_PIXMAP, (uint32_t[1]){ bg_pixmap });
288 /* XXX: Possible optimization: Only update the area in the middle of the
289 * screen instead of the whole screen. */
290 xcb_clear_area(conn, 0, win, 0, 0, scr->width_in_pixels, scr->height_in_pixels);
291 xcb_free_pixmap(conn, bg_pixmap);
296 * Resets pam_state to STATE_PAM_IDLE 2 seconds after an unsuccesful
297 * authentication event.
300 static void clear_pam_wrong(EV_P_ ev_timer *w, int revents) {
301 DEBUG("clearing pam wrong\n");
302 pam_state = STATE_PAM_IDLE;
303 unlock_state = STATE_STARTED;
308 * Hides the unlock indicator completely when there is no content in the
312 static void clear_indicator(EV_P_ ev_timer *w, int revents) {
313 if (input_position == 0) {
314 DEBUG("Clear indicator\n");
315 unlock_state = STATE_STARTED;
316 } else unlock_state = STATE_KEY_PRESSED;
321 * (Re-)starts the clear_indicator timeout. Called after pressing backspace or
322 * after an unsuccessful authentication attempt.
325 static void start_clear_indicator_timeout() {
326 if (clear_indicator_timeout) {
327 ev_timer_stop(main_loop, clear_indicator_timeout);
328 ev_timer_set(clear_indicator_timeout, 1.0, 0.);
329 ev_timer_start(main_loop, clear_indicator_timeout);
331 clear_indicator_timeout = calloc(sizeof(struct ev_timer), 1);
332 ev_timer_init(clear_indicator_timeout, clear_indicator, 1.0, 0.);
333 ev_timer_start(main_loop, clear_indicator_timeout);
337 static void input_done() {
338 if (input_position == 0)
341 if (clear_pam_wrong_timeout) {
342 ev_timer_stop(main_loop, clear_pam_wrong_timeout);
343 clear_pam_wrong_timeout = NULL;
346 pam_state = STATE_PAM_VERIFY;
349 if (pam_authenticate(pam_handle, 0) == PAM_SUCCESS) {
350 printf("successfully authenticated\n");
351 clear_password_memory();
355 fprintf(stderr, "Authentication failure\n");
357 pam_state = STATE_PAM_WRONG;
360 /* Clear this state after 2 seconds (unless the user enters another
361 * password during that time). */
362 ev_now_update(main_loop);
363 clear_pam_wrong_timeout = calloc(sizeof(struct ev_timer), 1);
364 ev_timer_init(clear_pam_wrong_timeout, clear_pam_wrong, 2.0, 0.);
365 ev_timer_start(main_loop, clear_pam_wrong_timeout);
367 /* Cancel the clear_indicator_timeout, it would hide the unlock indicator
369 if (clear_indicator_timeout) {
370 ev_timer_stop(main_loop, clear_indicator_timeout);
371 clear_indicator_timeout = NULL;
374 /* beep on authentication failure, if enabled */
382 * Called when the user releases a key. We need to leave the Mode_switch
383 * state when the user releases the Mode_switch key.
386 static void handle_key_release(xcb_key_release_event_t *event) {
387 DEBUG("releasing key %d, state raw = %d, modeswitch_active = %d, iso_level3_shift_active = %d, iso_level5_shift_active = %d\n",
388 event->detail, event->state, modeswitch_active, iso_level3_shift_active, iso_level5_shift_active);
390 /* We don’t care about the column here and just use the first symbol. Since
391 * we only check for Mode_switch and ISO_Level3_Shift, this *should* work.
392 * Also, if we would use the current column, we would look in the wrong
394 xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, 0);
395 if (sym == XK_Mode_switch) {
396 //printf("Mode switch disabled\n");
397 modeswitch_active = false;
398 } else if (sym == XK_ISO_Level3_Shift) {
399 iso_level3_shift_active = false;
400 } else if (sym == XK_ISO_Level5_Shift) {
401 iso_level5_shift_active = false;
403 DEBUG("release done. modeswitch_active = %d, iso_level3_shift_active = %d, iso_level5_shift_active = %d\n",
404 modeswitch_active, iso_level3_shift_active, iso_level5_shift_active);
407 static void redraw_timeout(EV_P_ ev_timer *w, int revents) {
412 * Handle key presses. Fixes state, then looks up the key symbol for the
413 * given keycode, then looks up the key symbol (as UCS-2), converts it to
414 * UTF-8 and stores it in the password array.
417 static void handle_key_press(xcb_key_press_event_t *event) {
418 DEBUG("keypress %d, state raw = %d, modeswitch_active = %d, iso_level3_shift_active = %d\n",
419 event->detail, event->state, modeswitch_active, iso_level3_shift_active);
421 xcb_keysym_t sym0, sym1, sym;
422 /* For each keycode, there is a list of symbols. The list could look like this:
423 * $ xmodmap -pke | grep 'keycode 38'
424 * keycode 38 = a A adiaeresis Adiaeresis o O
425 * In non-X11 terminology, the symbols for the keycode 38 (the key labeled
426 * with "a" on my keyboard) are "a A ä Ä o O".
427 * Another form to display the same information is using xkbcomp:
428 * $ xkbcomp $DISPLAY /tmp/xkb.dump
429 * Then open /tmp/xkb.dump and search for '\<a\>' (in VIM regexp-language):
431 * symbols[Group1]= [ a, A, o, O ],
432 * symbols[Group2]= [ adiaeresis, Adiaeresis ]
434 * So there are two *groups*, one containing 'a A' and one containing 'ä
435 * Ä'. You can use Mode_switch to switch between these groups. You can use
436 * ISO_Level3_Shift to reach the 'o O' part of the first group (it’s the
437 * same group, just an even higher shift level).
439 * So, using the "logical" XKB information, the following lookup will be
442 * Neither Mode_switch nor ISO_Level3_Shift active: group 1, column 0 and 1
443 * Mode_switch active: group 2, column 0 and 1
444 * ISO_Level3_Shift active: group 1, column 2 and 3
446 * Using the column index which xcb_key_press_lookup_keysym uses (and
447 * xmodmap prints out), the following lookup will be performed:
449 * Neither Mode_switch nor ISO_Level3_Shift active: column 0 and 1
450 * Mode_switch active: column 2 and 3
451 * ISO_Level3_Shift active: column 4 and 5
454 if (modeswitch_active)
456 if (iso_level3_shift_active)
458 if (iso_level5_shift_active)
460 sym0 = xcb_key_press_lookup_keysym(symbols, event, base_column);
461 sym1 = xcb_key_press_lookup_keysym(symbols, event, base_column + 1);
464 DEBUG("Mode switch enabled\n");
465 modeswitch_active = true;
467 case XK_ISO_Level3_Shift:
468 DEBUG("ISO_Level3_Shift enabled\n");
469 iso_level3_shift_active = true;
471 case XK_ISO_Level5_Shift:
472 DEBUG("ISO_Level5_Shift enabled\n");
473 iso_level5_shift_active = true;
480 clear_password_memory();
481 password[input_position] = '\0';
485 if (input_position == 0)
488 /* decrement input_position to point to the previous glyph */
489 u8_dec(password, &input_position);
490 password[input_position] = '\0';
492 /* Clear this state after 2 seconds (unless the user enters another
493 * password during that time). */
494 start_clear_indicator_timeout();
495 unlock_state = STATE_BACKSPACE_ACTIVE;
497 unlock_state = STATE_KEY_PRESSED;
498 //printf("new input position = %d, new password = %s\n", input_position, password);
502 if ((input_position + 8) >= sizeof(password))
505 if ((event->state & numlockmask) && xcb_is_keypad_key(sym1)) {
506 /* this key was a keypad key */
507 if ((event->state & XCB_MOD_MASK_SHIFT))
511 if ((event->state & XCB_MOD_MASK_SHIFT))
517 /* FIXME: handle all of these? */
518 printf("is_keypad_key = %d\n", xcb_is_keypad_key(sym));
519 printf("is_private_keypad_key = %d\n", xcb_is_private_keypad_key(sym));
520 printf("xcb_is_cursor_key = %d\n", xcb_is_cursor_key(sym));
521 printf("xcb_is_pf_key = %d\n", xcb_is_pf_key(sym));
522 printf("xcb_is_function_key = %d\n", xcb_is_function_key(sym));
523 printf("xcb_is_misc_function_key = %d\n", xcb_is_misc_function_key(sym));
524 printf("xcb_is_modifier_key = %d\n", xcb_is_modifier_key(sym));
527 if (xcb_is_modifier_key(sym) || xcb_is_cursor_key(sym))
530 DEBUG("resolved to keysym = %c (%d)\n", sym, sym);
532 /* convert the keysym to UCS */
533 uint16_t ucs = keysym2ucs(sym);
534 if ((int16_t)ucs == -1) {
535 fprintf(stderr, "Keysym could not be converted to UCS, skipping\n");
539 /* store the UCS in a string to convert it */
540 uint8_t inp[3] = {(ucs & 0xFF00) >> 8, (ucs & 0xFF), 0};
541 DEBUG("input part = %s\n", inp);
543 /* store it in the password array as UTF-8 */
544 input_position += convert_ucs_to_utf8((char*)inp, password + input_position);
545 password[input_position] = '\0';
546 DEBUG("current password = %s\n", password);
548 unlock_state = STATE_KEY_ACTIVE;
550 unlock_state = STATE_KEY_PRESSED;
552 struct ev_timer *timeout = calloc(sizeof(struct ev_timer), 1);
553 ev_timer_init(timeout, redraw_timeout, 0.25, 0.);
554 ev_timer_start(main_loop, timeout);
556 if (clear_indicator_timeout) {
557 ev_timer_stop(main_loop, clear_indicator_timeout);
558 clear_indicator_timeout = NULL;
563 * A visibility notify event will be received when the visibility (= can the
564 * user view the complete window) changes, so for example when a popup overlays
565 * some area of the i3lock window.
567 * In this case, we raise our window on top so that the popup (or whatever is
568 * hiding us) gets hidden.
571 static void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
572 if (event->state != XCB_VISIBILITY_UNOBSCURED) {
573 uint32_t values[] = { XCB_STACK_MODE_ABOVE };
574 xcb_configure_window(conn, event->window, XCB_CONFIG_WINDOW_STACK_MODE, values);
580 * Called when the keyboard mapping changes. We update our symbols.
583 static void handle_mapping_notify(xcb_mapping_notify_event_t *event) {
584 xcb_refresh_keyboard_mapping(symbols, event);
586 modeswitchmask = get_mod_mask(conn, symbols, XK_Mode_switch);
587 numlockmask = get_mod_mask(conn, symbols, XK_Num_Lock);
591 * Called when the properties on the root window change, e.g. when the screen
592 * resolution changes. If so we update the window to cover the whole screen
593 * and also redraw the image, if any.
596 void handle_screen_resize(xcb_visualtype_t *vistype, xcb_window_t win, uint32_t* last_resolution) {
597 xcb_get_geometry_cookie_t geomc;
598 xcb_get_geometry_reply_t *geom;
599 geomc = xcb_get_geometry(conn, scr->root);
600 if ((geom = xcb_get_geometry_reply(conn, geomc, 0)) == NULL) {
604 if (last_resolution[0] == geom->width && last_resolution[1] == geom->height)
607 last_resolution[0] = geom->width;
608 last_resolution[1] = geom->height;
612 xcb_pixmap_t bg_pixmap = draw_image(vistype, last_resolution);
613 xcb_change_window_attributes(conn, win, XCB_CW_BACK_PIXMAP, (uint32_t[1]){ bg_pixmap });
614 xcb_free_pixmap(conn, bg_pixmap);
618 uint32_t mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
619 xcb_configure_window(conn, win, mask, last_resolution);
624 * Callback function for PAM. We only react on password request callbacks.
627 static int conv_callback(int num_msg, const struct pam_message **msg,
628 struct pam_response **resp, void *appdata_ptr)
633 /* PAM expects an array of responses, one for each message */
634 if ((*resp = calloc(num_msg, sizeof(struct pam_message))) == NULL) {
639 for (int c = 0; c < num_msg; c++) {
640 if (msg[c]->msg_style != PAM_PROMPT_ECHO_OFF &&
641 msg[c]->msg_style != PAM_PROMPT_ECHO_ON)
644 /* return code is currently not used but should be set to zero */
645 resp[c]->resp_retcode = 0;
646 if ((resp[c]->resp = strdup(password)) == NULL) {
656 * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
657 * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
660 static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
661 /* empty, because xcb_prepare_cb and xcb_check_cb are used */
665 * Flush before blocking (and waiting for new events)
668 static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
673 * Instead of polling the X connection socket we leave this to
674 * xcb_poll_for_event() which knows better than we can ever know.
677 static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
678 xcb_generic_event_t *event;
680 while ((event = xcb_poll_for_event(conn)) != NULL) {
681 if (event->response_type == 0) {
682 xcb_generic_error_t *error = (xcb_generic_error_t*)event;
683 fprintf(stderr, "X11 Error received! sequence 0x%x, error_code = %d\n",
684 error->sequence, error->error_code);
689 /* Strip off the highest bit (set if the event is generated) */
690 int type = (event->response_type & 0x7F);
692 if (type == XCB_KEY_PRESS) {
693 handle_key_press((xcb_key_press_event_t*)event);
697 if (type == XCB_KEY_RELEASE) {
698 handle_key_release((xcb_key_release_event_t*)event);
700 /* If this was the backspace or escape key we are back at an
701 * empty input, so turn off the screen if DPMS is enabled */
702 if (dpms && input_position == 0)
703 dpms_turn_off_screen(conn);
708 if (type == XCB_VISIBILITY_NOTIFY) {
709 handle_visibility_notify((xcb_visibility_notify_event_t*)event);
713 if (type == XCB_MAPPING_NOTIFY) {
714 handle_mapping_notify((xcb_mapping_notify_event_t*)event);
718 if (type == XCB_CONFIGURE_NOTIFY) {
719 handle_screen_resize(vistype, win, last_resolution);
723 printf("WARNING: unhandled event of type %d\n", type);
729 int main(int argc, char *argv[]) {
730 bool dont_fork = false;
733 char *image_path = NULL;
736 struct pam_conv conv = {conv_callback, NULL};
738 int curs_choice = CURS_NONE;
741 struct option longopts[] = {
742 {"version", no_argument, NULL, 'v'},
743 {"nofork", no_argument, NULL, 'n'},
744 {"beep", no_argument, NULL, 'b'},
745 {"dpms", no_argument, NULL, 'd'},
746 {"color", required_argument, NULL, 'c'},
747 {"pointer", required_argument, NULL , 'p'},
748 {"debug", no_argument, NULL, 0},
749 {"help", no_argument, NULL, 'h'},
750 {"no-unlock-indicator", no_argument, NULL, 'u'},
752 {"image", required_argument, NULL, 'i'},
753 {"tiling", no_argument, NULL, 't'},
755 {NULL, no_argument, NULL, 0}
758 if ((username = getenv("USER")) == NULL)
759 errx(1, "USER environment variable not set, please set it.\n");
761 while ((o = getopt_long(argc, argv, "hvnbdc:p:u"
765 , longopts, &optind)) != -1) {
768 errx(EXIT_SUCCESS, "version " VERSION " © 2010-2011 Michael Stapelberg");
781 /* Skip # if present */
785 if (strlen(arg) != 6 || sscanf(arg, "%06[0-9a-fA-F]", color) != 1)
786 errx(1, "color is invalid, color must be given in 6-byte format: rrggbb\n");
791 unlock_indicator = false;
795 image_path = strdup(optarg);
802 if (!strcmp(optarg, "win")) {
803 curs_choice = CURS_WIN;
804 } else if (!strcmp(optarg, "default")) {
805 curs_choice = CURS_DEFAULT;
807 errx(1, "i3lock: Invalid pointer type given. Expected one of \"win\" or \"default\".\n");
811 if (strcmp(longopts[optind].name, "debug") == 0)
815 errx(1, "Syntax: i3lock [-v] [-n] [-b] [-d] [-c color] [-u] [-p win|default]"
817 " [-i image.png] [-t]"
819 " (compiled with NOLIBCAIRO)"
825 /* We need (relatively) random numbers for highlighting a random part of
826 * the unlock indicator upon keypresses. */
830 ret = pam_start("i3lock", username, &conv, &pam_handle);
831 if (ret != PAM_SUCCESS)
832 errx(EXIT_FAILURE, "PAM: %s", pam_strerror(pam_handle, ret));
834 /* Lock the area where we store the password in memory, we don’t want it to
835 * be swapped to disk. Since Linux 2.6.9, this does not require any
836 * privileges, just enough bytes in the RLIMIT_MEMLOCK limit. */
837 if (mlock(password, sizeof(password)) != 0)
838 err(EXIT_FAILURE, "Could not lock page in memory, check RLIMIT_MEMLOCK");
840 /* Initialize connection to X11 */
841 if ((conn = xcb_connect(NULL, &screen)) == NULL ||
842 xcb_connection_has_error(conn))
843 errx(EXIT_FAILURE, "Could not connect to X11, maybe you need to set DISPLAY?");
846 /* In the parent process, we exit */
851 /* if DPMS is enabled, check if the X server really supports it */
853 xcb_dpms_capable_cookie_t dpmsc = xcb_dpms_capable(conn);
854 xcb_dpms_capable_reply_t *dpmsr;
855 if ((dpmsr = xcb_dpms_capable_reply(conn, dpmsc, NULL)) && !dpmsr->capable) {
856 fprintf(stderr, "Disabling DPMS, X server not DPMS capable\n");
861 scr = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
862 vistype = get_root_visual_type(scr);
864 last_resolution[0] = scr->width_in_pixels;
865 last_resolution[1] = scr->height_in_pixels;
870 /* Create a pixmap to render on, fill it with the background color */
871 img = cairo_image_surface_create_from_png(image_path);
875 /* Pixmap on which the image is rendered to (if any) */
876 xcb_pixmap_t bg_pixmap = draw_image(vistype, last_resolution);
878 /* open the fullscreen window, already with the correct pixmap in place */
879 win = open_fullscreen_window(conn, scr, color, bg_pixmap);
880 xcb_free_pixmap(conn, bg_pixmap);
882 cursor = create_cursor(conn, scr, win, curs_choice);
884 grab_pointer_and_keyboard(conn, scr, cursor);
886 symbols = xcb_key_symbols_alloc(conn);
887 modeswitchmask = get_mod_mask(conn, symbols, XK_Mode_switch);
888 numlockmask = get_mod_mask(conn, symbols, XK_Num_Lock);
891 dpms_turn_off_screen(conn);
893 /* Initialize the libev event loop. */
894 main_loop = EV_DEFAULT;
895 if (main_loop == NULL)
896 errx(EXIT_FAILURE, "Could not initialize libev. Bad LIBEV_FLAGS?\n");
898 struct ev_io *xcb_watcher = calloc(sizeof(struct ev_io), 1);
899 struct ev_check *xcb_check = calloc(sizeof(struct ev_check), 1);
900 struct ev_prepare *xcb_prepare = calloc(sizeof(struct ev_prepare), 1);
902 ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
903 ev_io_start(main_loop, xcb_watcher);
905 ev_check_init(xcb_check, xcb_check_cb);
906 ev_check_start(main_loop, xcb_check);
908 ev_prepare_init(xcb_prepare, xcb_prepare_cb);
909 ev_prepare_start(main_loop, xcb_prepare);
912 ev_loop(main_loop, 0);