/* * vim:ts=4:sw=4:expandtab * * © 2010-2011 Michael Stapelberg * * See LICENSE for licensing information * */ #include #include #include #include #include #include #include #include #include #include #include #include /* FIXME: can we get rid of this header? */ #include #include #include #include #include #ifndef NOLIBCAIRO #include #include #endif #include "keysym2ucs.h" #include "ucs2_to_utf8.h" #include "xcb.h" #include "cursors.h" #define BUTTON_RADIUS 90 #define BUTTON_SPACE (BUTTON_RADIUS + 5) #define BUTTON_CENTER (BUTTON_RADIUS + 5) #define BUTTON_DIAMETER (5 * BUTTON_SPACE) static char color[7] = "ffffff"; static uint32_t last_resolution[2]; static xcb_connection_t *conn; static xcb_window_t win; static xcb_visualtype_t *vistype; static xcb_cursor_t cursor; static xcb_key_symbols_t *symbols; static xcb_screen_t *scr; static pam_handle_t *pam_handle; static int input_position = 0; /* holds the password you enter (in UTF-8) */ static char password[512]; static bool modeswitch_active = false; static bool iso_level3_shift_active = false; static int modeswitchmask; static int numlockmask; static bool beep = false; static bool debug_mode = false; static bool dpms = false; static bool unlock_indicator = true; static struct ev_loop *main_loop; static struct ev_timer *clear_pam_wrong_timeout; static struct ev_timer *clear_indicator_timeout; static enum { STATE_STARTED = 0, /* default state */ STATE_KEY_PRESSED = 1, /* key was pressed, show unlock indicator */ STATE_KEY_ACTIVE = 2, /* a key was pressed recently, highlight part of the unlock indicator. */ STATE_BACKSPACE_ACTIVE = 3 /* backspace was pressed recently, highlight part of the unlock indicator in red. */ } unlock_state; static enum { STATE_PAM_IDLE = 0, /* no PAM interaction at the moment */ STATE_PAM_VERIFY = 1, /* currently verifying the password via PAM */ STATE_PAM_WRONG = 2 /* the password was wrong */ } pam_state; #define DEBUG(fmt, ...) do { \ if (debug_mode) \ printf("[i3lock-debug] " fmt, ##__VA_ARGS__); \ } while (0) #ifndef NOLIBCAIRO static cairo_surface_t *img = NULL; static bool tile = false; #endif /* * Draws global image with fill color onto a pixmap with the given * resolution and returns it. * */ static xcb_pixmap_t draw_image(xcb_visualtype_t *vistype, u_int32_t* resolution) { xcb_pixmap_t bg_pixmap = XCB_NONE; #ifndef NOLIBCAIRO bg_pixmap = create_bg_pixmap(conn, scr, resolution, color); /* Initialize cairo */ cairo_surface_t *output; output = cairo_xcb_surface_create(conn, bg_pixmap, vistype, resolution[0], resolution[1]); cairo_t *ctx = cairo_create(output); if (img) { if (!tile) { cairo_set_source_surface(ctx, img, 0, 0); cairo_paint(ctx); } else { /* create a pattern and fill a rectangle as big as the screen */ cairo_pattern_t *pattern; pattern = cairo_pattern_create_for_surface(img); cairo_set_source(ctx, pattern); cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT); cairo_rectangle(ctx, 0, 0, resolution[0], resolution[1]); cairo_fill(ctx); cairo_pattern_destroy(pattern); } } if (unlock_state >= STATE_KEY_PRESSED && unlock_indicator) { cairo_pattern_t *outer_pat = NULL; outer_pat = cairo_pattern_create_linear(0, 0, 0, BUTTON_DIAMETER); switch (pam_state) { case STATE_PAM_VERIFY: cairo_pattern_add_color_stop_rgb(outer_pat, 0, 139.0/255, 0, 250.0/255); cairo_pattern_add_color_stop_rgb(outer_pat, 1, 51.0/255, 0, 250.0/255); break; case STATE_PAM_WRONG: cairo_pattern_add_color_stop_rgb(outer_pat, 0, 255.0/250, 139.0/255, 0); cairo_pattern_add_color_stop_rgb(outer_pat, 1, 125.0/255, 51.0/255, 0); break; case STATE_PAM_IDLE: cairo_pattern_add_color_stop_rgb(outer_pat, 0, 139.0/255, 125.0/255, 0); cairo_pattern_add_color_stop_rgb(outer_pat, 1, 51.0/255, 125.0/255, 0); break; } /* Draw a (centered) circle with transparent background. */ cairo_set_line_width(ctx, 10.0); cairo_arc(ctx, (resolution[0] / 2) /* x */, (resolution[1] / 2) /* y */, BUTTON_RADIUS /* radius */, 0 /* start */, 2 * M_PI /* end */); /* Use the appropriate color for the different PAM states * (currently verifying, wrong password, or default) */ switch (pam_state) { case STATE_PAM_VERIFY: cairo_set_source_rgba(ctx, 0, 114.0/255, 255.0/255, 0.75); break; case STATE_PAM_WRONG: cairo_set_source_rgba(ctx, 250.0/255, 0, 0, 0.75); break; default: cairo_set_source_rgba(ctx, 0, 0, 0, 0.75); break; } cairo_fill_preserve(ctx); cairo_set_source(ctx, outer_pat); cairo_stroke(ctx); /* Draw an inner seperator line. */ cairo_set_source_rgb(ctx, 0, 0, 0); cairo_set_line_width(ctx, 2.0); cairo_arc(ctx, (resolution[0] / 2) /* x */, (resolution[1] / 2) /* y */, BUTTON_RADIUS - 5 /* radius */, 0, 2 * M_PI); cairo_stroke(ctx); cairo_set_line_width(ctx, 10.0); /* Display a (centered) text of the current PAM state. */ char *text = NULL; switch (pam_state) { case STATE_PAM_VERIFY: text = "verifying…"; break; case STATE_PAM_WRONG: text = "wrong!"; break; default: break; } if (text) { cairo_text_extents_t extents; double x, y; cairo_set_source_rgb(ctx, 0, 0, 0); cairo_set_font_size(ctx, 28.0); cairo_text_extents(ctx, text, &extents); x = (resolution[0] / 2.0) - ((extents.width / 2) + extents.x_bearing); y = (resolution[1] / 2.0) - ((extents.height / 2) + extents.y_bearing); cairo_move_to(ctx, x, y); cairo_show_text(ctx, text); cairo_close_path(ctx); } /* After the user pressed any valid key or the backspace key, we * highlight a random part of the unlock indicator to confirm this * keypress. */ if (unlock_state == STATE_KEY_ACTIVE || unlock_state == STATE_BACKSPACE_ACTIVE) { cairo_new_sub_path(ctx); double highlight_start = (rand() % (int)(2 * M_PI * 100)) / 100.0; DEBUG("Highlighting part %.2f\n", highlight_start); cairo_arc(ctx, resolution[0] / 2 /* x */, resolution[1] / 2 /* y */, BUTTON_RADIUS /* radius */, highlight_start, highlight_start + (M_PI / 3.0)); if (unlock_state == STATE_KEY_ACTIVE) { /* For normal keys, we use a lighter green. */ outer_pat = cairo_pattern_create_linear(0, 0, 0, BUTTON_DIAMETER); cairo_pattern_add_color_stop_rgb(outer_pat, 0, 139.0/255, 219.0/255, 0); cairo_pattern_add_color_stop_rgb(outer_pat, 1, 51.0/255, 219.0/255, 0); } else { /* For backspace, we use red. */ outer_pat = cairo_pattern_create_linear(0, 0, 0, BUTTON_DIAMETER); cairo_pattern_add_color_stop_rgb(outer_pat, 0, 219.0/255, 139.0/255, 0); cairo_pattern_add_color_stop_rgb(outer_pat, 1, 219.0/255, 51.0/255, 0); } cairo_set_source(ctx, outer_pat); cairo_stroke(ctx); /* Draw two little separators for the highlighted part of the * unlock indicator. */ cairo_set_source_rgb(ctx, 0, 0, 0); cairo_arc(ctx, (resolution[0] / 2) /* x */, (resolution[1] / 2) /* y */, BUTTON_RADIUS /* radius */, highlight_start /* start */, highlight_start + (M_PI / 128.0) /* end */); cairo_stroke(ctx); cairo_arc(ctx, (resolution[0] / 2) /* x */, (resolution[1] / 2) /* y */, BUTTON_RADIUS /* radius */, highlight_start + (M_PI / 3.0) /* start */, (highlight_start + (M_PI / 3.0)) + (M_PI / 128.0) /* end */); cairo_stroke(ctx); } } cairo_surface_destroy(output); cairo_destroy(ctx); #endif return bg_pixmap; } /* * Calls draw_image on a new pixmap and swaps that with the current pixmap * */ static void redraw_screen() { xcb_pixmap_t bg_pixmap = draw_image(vistype, last_resolution); xcb_change_window_attributes(conn, win, XCB_CW_BACK_PIXMAP, (uint32_t[1]){ bg_pixmap }); /* XXX: Possible optimization: Only update the area in the middle of the * screen instead of the whole screen. */ xcb_clear_area(conn, 0, win, 0, 0, scr->width_in_pixels, scr->height_in_pixels); xcb_flush(conn); } /* * Resets pam_state to STATE_PAM_IDLE 2 seconds after an unsuccesful * authentication event. * */ static void clear_pam_wrong(EV_P_ ev_timer *w, int revents) { pam_state = STATE_PAM_IDLE; unlock_state = STATE_STARTED; redraw_screen(); } /* * Hides the unlock indicator completely when there is no content in the * password buffer. * */ static void clear_indicator(EV_P_ ev_timer *w, int revents) { DEBUG("Clear indicator\n"); unlock_state = STATE_STARTED; redraw_screen(); } /* * (Re-)starts the clear_indicator timeout. Called after pressing backspace or * after an unsuccessful authentication attempt. * */ static void start_clear_indicator_timeout() { if (clear_indicator_timeout) { ev_timer_stop(main_loop, clear_indicator_timeout); ev_timer_set(clear_indicator_timeout, 1.0, 0.); ev_timer_start(main_loop, clear_indicator_timeout); } else { clear_indicator_timeout = calloc(sizeof(struct ev_timer), 1); ev_timer_init(clear_indicator_timeout, clear_indicator, 1.0, 0.); ev_timer_start(main_loop, clear_indicator_timeout); } } static void input_done() { if (input_position == 0) return; if (clear_pam_wrong_timeout) { ev_timer_stop(main_loop, clear_pam_wrong_timeout); clear_pam_wrong_timeout = NULL; } pam_state = STATE_PAM_VERIFY; redraw_screen(); if (pam_authenticate(pam_handle, 0) == PAM_SUCCESS) { printf("successfully authenticated\n"); exit(0); } fprintf(stderr, "Authentication failure\n"); pam_state = STATE_PAM_WRONG; redraw_screen(); /* Clear this state after 2 seconds (unless the user enters another * password during that time). */ ev_now_update(main_loop); clear_pam_wrong_timeout = calloc(sizeof(struct ev_timer), 1); ev_timer_init(clear_pam_wrong_timeout, clear_pam_wrong, 2.0, 0.); ev_timer_start(main_loop, clear_pam_wrong_timeout); /* beep on authentication failure, if enabled */ if (beep) { xcb_bell(conn, 100); xcb_flush(conn); } } /* * Called when the user releases a key. We need to leave the Mode_switch * state when the user releases the Mode_switch key. * */ static void handle_key_release(xcb_key_release_event_t *event) { DEBUG("releasing key %d, state raw = %d, modeswitch_active = %d, iso_level3_shift_active = %d\n", event->detail, event->state, modeswitch_active, iso_level3_shift_active); /* We don’t care about the column here and just use the first symbol. Since * we only check for Mode_switch and ISO_Level3_Shift, this *should* work. * Also, if we would use the current column, we would look in the wrong * place. */ xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, 0); if (sym == XK_Mode_switch) { //printf("Mode switch disabled\n"); modeswitch_active = false; } else if (sym == XK_ISO_Level3_Shift) { iso_level3_shift_active = false; } DEBUG("release done. modeswitch_active = %d, iso_level3_shift_active = %d\n", modeswitch_active, iso_level3_shift_active); } static void redraw_timeout(EV_P_ ev_timer *w, int revents) { redraw_screen(); } /* * Handle key presses. Fixes state, then looks up the key symbol for the * given keycode, then looks up the key symbol (as UCS-2), converts it to * UTF-8 and stores it in the password array. * */ static void handle_key_press(xcb_key_press_event_t *event) { DEBUG("keypress %d, state raw = %d, modeswitch_active = %d, iso_level3_shift_active = %d\n", event->detail, event->state, modeswitch_active, iso_level3_shift_active); xcb_keysym_t sym0, sym1, sym; /* For each keycode, there is a list of symbols. The list could look like this: * $ xmodmap -pke | grep 'keycode 38' * keycode 38 = a A adiaeresis Adiaeresis o O * In non-X11 terminology, the symbols for the keycode 38 (the key labeled * with "a" on my keyboard) are "a A ä Ä o O". * Another form to display the same information is using xkbcomp: * $ xkbcomp $DISPLAY /tmp/xkb.dump * Then open /tmp/xkb.dump and search for '\' (in VIM regexp-language): * * symbols[Group1]= [ a, A, o, O ], * symbols[Group2]= [ adiaeresis, Adiaeresis ] * * So there are two *groups*, one containing 'a A' and one containing 'ä * Ä'. You can use Mode_switch to switch between these groups. You can use * ISO_Level3_Shift to reach the 'o O' part of the first group (it’s the * same group, just an even higher shift level). * * So, using the "logical" XKB information, the following lookup will be * performed: * * Neither Mode_switch nor ISO_Level3_Shift active: group 1, column 0 and 1 * Mode_switch active: group 2, column 0 and 1 * ISO_Level3_Shift active: group 1, column 2 and 3 * * Using the column index which xcb_key_press_lookup_keysym uses (and * xmodmap prints out), the following lookup will be performed: * * Neither Mode_switch nor ISO_Level3_Shift active: column 0 and 1 * Mode_switch active: column 2 and 3 * ISO_Level3_Shift active: column 4 and 5 */ int base_column = 0; if (modeswitch_active) base_column = 2; if (iso_level3_shift_active) base_column = 4; sym0 = xcb_key_press_lookup_keysym(symbols, event, base_column); sym1 = xcb_key_press_lookup_keysym(symbols, event, base_column + 1); switch (sym0) { case XK_Mode_switch: DEBUG("Mode switch enabled\n"); modeswitch_active = true; return; case XK_ISO_Level3_Shift: DEBUG("ISO_Level3_Shift enabled\n"); iso_level3_shift_active = true; return; case XK_Return: case XK_KP_Enter: input_done(); case XK_Escape: input_position = 0; password[input_position] = '\0'; return; case XK_BackSpace: if (input_position == 0) return; /* decrement input_position to point to the previous glyph */ u8_dec(password, &input_position); password[input_position] = '\0'; /* Clear this state after 2 seconds (unless the user enters another * password during that time). */ start_clear_indicator_timeout(); unlock_state = STATE_BACKSPACE_ACTIVE; redraw_screen(); unlock_state = STATE_KEY_PRESSED; //printf("new input position = %d, new password = %s\n", input_position, password); return; } if ((input_position + 8) >= sizeof(password)) return; if ((event->state & numlockmask) && xcb_is_keypad_key(sym1)) { /* this key was a keypad key */ if ((event->state & XCB_MOD_MASK_SHIFT)) sym = sym0; else sym = sym1; } else { if ((event->state & XCB_MOD_MASK_SHIFT)) sym = sym1; else sym = sym0; } #if 0 /* FIXME: handle all of these? */ printf("is_keypad_key = %d\n", xcb_is_keypad_key(sym)); printf("is_private_keypad_key = %d\n", xcb_is_private_keypad_key(sym)); printf("xcb_is_cursor_key = %d\n", xcb_is_cursor_key(sym)); printf("xcb_is_pf_key = %d\n", xcb_is_pf_key(sym)); printf("xcb_is_function_key = %d\n", xcb_is_function_key(sym)); printf("xcb_is_misc_function_key = %d\n", xcb_is_misc_function_key(sym)); printf("xcb_is_modifier_key = %d\n", xcb_is_modifier_key(sym)); #endif if (xcb_is_modifier_key(sym) || xcb_is_cursor_key(sym)) return; DEBUG("resolved to keysym = %c (%d)\n", sym, sym); /* convert the keysym to UCS */ uint16_t ucs = keysym2ucs(sym); if ((int16_t)ucs == -1) { fprintf(stderr, "Keysym could not be converted to UCS, skipping\n"); return; } /* store the UCS in a string to convert it */ uint8_t inp[3] = {(ucs & 0xFF00) >> 8, (ucs & 0xFF), 0}; DEBUG("input part = %s\n", inp); /* store it in the password array as UTF-8 */ input_position += convert_ucs_to_utf8((char*)inp, password + input_position); password[input_position] = '\0'; DEBUG("current password = %s\n", password); unlock_state = STATE_KEY_ACTIVE; redraw_screen(); unlock_state = STATE_KEY_PRESSED; struct ev_timer *timeout = calloc(sizeof(struct ev_timer), 1); ev_timer_init(timeout, redraw_timeout, 0.25, 0.); ev_timer_start(main_loop, timeout); if (clear_indicator_timeout) { ev_timer_stop(main_loop, clear_indicator_timeout); clear_indicator_timeout = NULL; } } /* * A visibility notify event will be received when the visibility (= can the * user view the complete window) changes, so for example when a popup overlays * some area of the i3lock window. * * In this case, we raise our window on top so that the popup (or whatever is * hiding us) gets hidden. * */ static void handle_visibility_notify(xcb_visibility_notify_event_t *event) { if (event->state != XCB_VISIBILITY_UNOBSCURED) { uint32_t values[] = { XCB_STACK_MODE_ABOVE }; xcb_configure_window(conn, event->window, XCB_CONFIG_WINDOW_STACK_MODE, values); xcb_flush(conn); } } /* * Called when the keyboard mapping changes. We update our symbols. * */ static void handle_mapping_notify(xcb_mapping_notify_event_t *event) { xcb_refresh_keyboard_mapping(symbols, event); modeswitchmask = get_mod_mask(conn, symbols, XK_Mode_switch); numlockmask = get_mod_mask(conn, symbols, XK_Num_Lock); } /* * Called when the properties on the root window change, e.g. when the screen * resolution changes. If so we update the window to cover the whole screen * and also redraw the image, if any. * */ void handle_screen_resize(xcb_visualtype_t *vistype, xcb_window_t win, uint32_t* last_resolution) { xcb_get_geometry_cookie_t geomc; xcb_get_geometry_reply_t *geom; geomc = xcb_get_geometry(conn, scr->root); if ((geom = xcb_get_geometry_reply(conn, geomc, 0)) == NULL) { return; } if (last_resolution[0] == geom->width && last_resolution[1] == geom->height) return; last_resolution[0] = geom->width; last_resolution[1] = geom->height; #ifndef NOLIBCAIRO if (img) { xcb_pixmap_t bg_pixmap = draw_image(vistype, last_resolution); xcb_change_window_attributes(conn, win, XCB_CW_BACK_PIXMAP, (uint32_t[1]){ bg_pixmap }); } #endif uint32_t mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT; xcb_configure_window(conn, win, mask, last_resolution); xcb_flush(conn); } /* * Callback function for PAM. We only react on password request callbacks. * */ static int conv_callback(int num_msg, const struct pam_message **msg, struct pam_response **resp, void *appdata_ptr) { if (num_msg == 0) return 1; /* PAM expects an array of responses, one for each message */ if ((*resp = calloc(num_msg, sizeof(struct pam_message))) == NULL) { perror("calloc"); return 1; } for (int c = 0; c < num_msg; c++) { if (msg[c]->msg_style != PAM_PROMPT_ECHO_OFF && msg[c]->msg_style != PAM_PROMPT_ECHO_ON) continue; /* return code is currently not used but should be set to zero */ resp[c]->resp_retcode = 0; if ((resp[c]->resp = strdup(password)) == NULL) { perror("strdup"); return 1; } } return 0; } /* * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb. * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop * */ static void xcb_got_event(EV_P_ struct ev_io *w, int revents) { /* empty, because xcb_prepare_cb and xcb_check_cb are used */ } /* * Flush before blocking (and waiting for new events) * */ static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) { xcb_flush(conn); } /* * Instead of polling the X connection socket we leave this to * xcb_poll_for_event() which knows better than we can ever know. * */ static void xcb_check_cb(EV_P_ ev_check *w, int revents) { xcb_generic_event_t *event; while ((event = xcb_poll_for_event(conn)) != NULL) { if (event->response_type == 0) { xcb_generic_error_t *error = (xcb_generic_error_t*)event; fprintf(stderr, "X11 Error received! sequence 0x%x, error_code = %d\n", error->sequence, error->error_code); free(event); continue; } /* Strip off the highest bit (set if the event is generated) */ int type = (event->response_type & 0x7F); if (type == XCB_KEY_PRESS) { handle_key_press((xcb_key_press_event_t*)event); continue; } if (type == XCB_KEY_RELEASE) { handle_key_release((xcb_key_release_event_t*)event); /* If this was the backspace or escape key we are back at an * empty input, so turn off the screen if DPMS is enabled */ if (dpms && input_position == 0) dpms_turn_off_screen(conn); continue; } if (type == XCB_VISIBILITY_NOTIFY) { handle_visibility_notify((xcb_visibility_notify_event_t*)event); continue; } if (type == XCB_MAPPING_NOTIFY) { handle_mapping_notify((xcb_mapping_notify_event_t*)event); continue; } if (type == XCB_CONFIGURE_NOTIFY) { handle_screen_resize(vistype, win, last_resolution); continue; } printf("WARNING: unhandled event of type %d\n", type); free(event); } } int main(int argc, char *argv[]) { bool dont_fork = false; char *username; #ifndef NOLIBCAIRO char *image_path = NULL; #endif int ret; struct pam_conv conv = {conv_callback, NULL}; int screen; int curs_choice = CURS_NONE; char o; int optind = 0; struct option longopts[] = { {"version", no_argument, NULL, 'v'}, {"nofork", no_argument, NULL, 'n'}, {"beep", no_argument, NULL, 'b'}, {"dpms", no_argument, NULL, 'd'}, {"color", required_argument, NULL, 'c'}, {"pointer", required_argument, NULL , 'p'}, {"debug", no_argument, NULL, 0}, {"help", no_argument, NULL, 'h'}, {"no-unlock-indicator", no_argument, NULL, 'u'}, #ifndef NOLIBCAIRO {"image", required_argument, NULL, 'i'}, {"tiling", no_argument, NULL, 't'}, #endif {NULL, no_argument, NULL, 0} }; if ((username = getenv("USER")) == NULL) errx(1, "USER environment variable not set, please set it.\n"); while ((o = getopt_long(argc, argv, "hvnbdc:p:u" #ifndef NOLIBCAIRO "i:t" #endif , longopts, &optind)) != -1) { switch (o) { case 'v': errx(EXIT_SUCCESS, "version " VERSION " © 2010-2011 Michael Stapelberg"); case 'n': dont_fork = true; break; case 'b': beep = true; break; case 'd': dpms = true; break; case 'c': { char *arg = optarg; /* Skip # if present */ if (arg[0] == '#') arg++; if (strlen(arg) != 6 || sscanf(arg, "%06[0-9a-fA-F]", color) != 1) errx(1, "color is invalid, color must be given in 6-byte format: rrggbb\n"); break; } case 'u': unlock_indicator = false; break; #ifndef NOLIBCAIRO case 'i': image_path = strdup(optarg); break; case 't': tile = true; break; #endif case 'p': if (!strcmp(optarg, "win")) { curs_choice = CURS_WIN; } else if (!strcmp(optarg, "default")) { curs_choice = CURS_DEFAULT; } else { errx(1, "i3lock: Invalid pointer type given. Expected one of \"win\" or \"default\".\n"); } break; case 0: if (strcmp(longopts[optind].name, "debug") == 0) debug_mode = true; break; default: errx(1, "Syntax: i3lock [-v] [-n] [-b] [-d] [-c color] [-u] [-p win|default]" #ifndef NOLIBCAIRO " [-i image.png] [-t]" #else " (compiled with NOLIBCAIRO)" #endif ); } } /* We need (relatively) random numbers for highlighting a random part of * the unlock indicator upon keypresses. */ srand(time(NULL)); /* Initialize PAM */ ret = pam_start("i3lock", username, &conv, &pam_handle); if (ret != PAM_SUCCESS) errx(EXIT_FAILURE, "PAM: %s\n", pam_strerror(pam_handle, ret)); /* Initialize connection to X11 */ if ((conn = xcb_connect(NULL, &screen)) == NULL || xcb_connection_has_error(conn)) errx(EXIT_FAILURE, "Could not connect to X11, maybe you need to set DISPLAY?"); if (!dont_fork) { /* In the parent process, we exit */ if (fork() != 0) return 0; } /* if DPMS is enabled, check if the X server really supports it */ if (dpms) { xcb_dpms_capable_cookie_t dpmsc = xcb_dpms_capable(conn); xcb_dpms_capable_reply_t *dpmsr; if ((dpmsr = xcb_dpms_capable_reply(conn, dpmsc, NULL)) && !dpmsr->capable) { fprintf(stderr, "Disabling DPMS, X server not DPMS capable\n"); dpms = false; } } scr = xcb_setup_roots_iterator(xcb_get_setup(conn)).data; vistype = get_root_visual_type(scr); last_resolution[0] = scr->width_in_pixels; last_resolution[1] = scr->height_in_pixels; #ifndef NOLIBCAIRO if (image_path) { /* Create a pixmap to render on, fill it with the background color */ img = cairo_image_surface_create_from_png(image_path); } #endif /* Pixmap on which the image is rendered to (if any) */ xcb_pixmap_t bg_pixmap = draw_image(vistype, last_resolution); /* open the fullscreen window, already with the correct pixmap in place */ win = open_fullscreen_window(conn, scr, color, bg_pixmap); cursor = create_cursor(conn, scr, win, curs_choice); grab_pointer_and_keyboard(conn, scr, cursor); symbols = xcb_key_symbols_alloc(conn); modeswitchmask = get_mod_mask(conn, symbols, XK_Mode_switch); numlockmask = get_mod_mask(conn, symbols, XK_Num_Lock); if (dpms) dpms_turn_off_screen(conn); /* Initialize the libev event loop. */ main_loop = EV_DEFAULT; if (main_loop == NULL) errx(EXIT_FAILURE, "Could not initialize libev. Bad LIBEV_FLAGS?\n"); struct ev_io *xcb_watcher = calloc(sizeof(struct ev_io), 1); struct ev_check *xcb_check = calloc(sizeof(struct ev_check), 1); struct ev_prepare *xcb_prepare = calloc(sizeof(struct ev_prepare), 1); ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ); ev_io_start(main_loop, xcb_watcher); ev_check_init(xcb_check, xcb_check_cb); ev_check_start(main_loop, xcb_check); ev_prepare_init(xcb_prepare, xcb_prepare_cb); ev_prepare_start(main_loop, xcb_prepare); xcb_flush(conn); ev_loop(main_loop, 0); }