X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=i3lock.c;h=5a87999f6b4b666b4e5dfa8bd4371e4ba97f48ae;hb=d4d589a7dd25a264c2679987fdb4072d833cb259;hp=5b495b554e471c65996d8cb6b22b15cca59bf908;hpb=189ee55bc074c14d61a900d428401580614a5618;p=i3%2Fi3lock diff --git a/i3lock.c b/i3lock.c index 5b495b5..5a87999 100644 --- a/i3lock.c +++ b/i3lock.c @@ -1,269 +1,703 @@ /* - * vim:ts=8:expandtab + * vim:ts=4:sw=4:expandtab * - * i3lock - an improved version of slock + * © 2010-2012 Michael Stapelberg * - * i3lock © 2009 Michael Stapelberg and contributors - * slock © 2006-2008 Anselm R Garbe - * - * See file LICENSE for license information. - * - * Note that on any error (calloc is out of memory for example) - * we do not do anything so that the user can fix the error by - * himself (kill X to get more free memory or stop some other - * program using SSH/console). + * See LICENSE for licensing information * */ -#define _XOPEN_SOURCE 500 - -#include -#include -#include #include +#include #include #include -#include -#include -#include -#include -#include -#include #include +#include +#include +#include +#include +#include +#include +#include #include +#include +#include +#include +#include +#include +#include +#include +#include -#include +#include "i3lock.h" +#include "xcb.h" +#include "cursors.h" +#include "unlock_indicator.h" +#include "xinerama.h" + +/* We need this for libxkbfile */ +static Display *display; +char color[7] = "ffffff"; +uint32_t last_resolution[2]; +xcb_window_t win; +static xcb_cursor_t cursor; +static pam_handle_t *pam_handle; +int input_position = 0; +/* Holds the password you enter (in UTF-8). */ +static char password[512]; +static bool beep = false; +bool debug_mode = false; +static bool dpms = false; +bool unlock_indicator = true; +static bool dont_fork = false; +struct ev_loop *main_loop; +static struct ev_timer *clear_pam_wrong_timeout; +extern unlock_state_t unlock_state; +extern pam_state_t pam_state; + +static struct xkb_state *xkb_state; +static struct xkb_context *xkb_context; +static struct xkb_keymap *xkb_keymap; -static char passwd[256]; +cairo_surface_t *img = NULL; +bool tile = false; -static void die(const char *errstr, ...) { - va_list ap; +/* isutf, u8_dec © 2005 Jeff Bezanson, public domain */ +#define isutf(c) (((c) & 0xC0) != 0x80) - va_start(ap, errstr); - vfprintf(stderr, errstr, ap); - va_end(ap); - exit(EXIT_FAILURE); +/* + * Decrements i to point to the previous unicode glyph + * + */ +void u8_dec(char *s, int *i) { + (void)(isutf(s[--(*i)]) || isutf(s[--(*i)]) || isutf(s[--(*i)]) || --(*i)); } /* - * Check if given file can be opened => exists + * Loads the XKB keymap from the X11 server and feeds it to xkbcommon. + * Necessary so that we can properly let xkbcommon track the keyboard state and + * translate keypresses to utf-8. + * + * Ideally, xkbcommon would ship something like this itself, but as of now + * (version 0.2.0), it doesn’t. * */ -bool file_exists(const char * filename) -{ - FILE * file = fopen(filename, "r"); - if(file) - { - fclose(file); - return true; - } +static bool load_keymap(void) { + bool ret = false; + XkbFileInfo result; + memset(&result, '\0', sizeof(result)); + result.xkb = XkbGetKeyboard(display, XkbAllMapComponentsMask, XkbUseCoreKbd); + if (result.xkb == NULL) { + fprintf(stderr, "[i3lock] XKB: XkbGetKeyboard failed\n"); + return false; + } + + FILE *temp = tmpfile(); + if (temp == NULL) { + fprintf(stderr, "[i3lock] could not create tempfile\n"); return false; + } + + bool ok = XkbWriteXKBKeymap(temp, &result, false, false, NULL, NULL); + if (!ok) { + fprintf(stderr, "[i3lock] XkbWriteXKBKeymap failed\n"); + goto out; + } + + rewind(temp); + + if (xkb_context == NULL) { + if ((xkb_context = xkb_context_new(0)) == NULL) { + fprintf(stderr, "[i3lock] could not create xkbcommon context\n"); + goto out; + } + } + + if (xkb_keymap != NULL) + xkb_keymap_unref(xkb_keymap); + + if ((xkb_keymap = xkb_keymap_new_from_file(xkb_context, temp, XKB_KEYMAP_FORMAT_TEXT_V1, 0)) == NULL) { + fprintf(stderr, "[i3lock] xkb_keymap_new_from_file failed\n"); + goto out; + } + + struct xkb_state *new_state = xkb_state_new(xkb_keymap); + if (new_state == NULL) { + fprintf(stderr, "[i3lock] xkb_state_new failed\n"); + goto out; + } + + if (xkb_state != NULL) + xkb_state_unref(xkb_state); + xkb_state = new_state; + + ret = true; +out: + XkbFreeKeyboard(result.xkb, XkbAllComponentsMask, true); + fclose(temp); + return ret; +} + +/* + * Clears the memory which stored the password to be a bit safer against + * cold-boot attacks. + * + */ +static void clear_password_memory(void) { + /* A volatile pointer to the password buffer to prevent the compiler from + * optimizing this out. */ + volatile char *vpassword = password; + for (int c = 0; c < sizeof(password); c++) + /* We store a non-random pattern which consists of the (irrelevant) + * index plus (!) the value of the beep variable. This prevents the + * compiler from optimizing the calls away, since the value of 'beep' + * is not known at compile-time. */ + vpassword[c] = c + (int)beep; +} + + +/* + * 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) { + DEBUG("clearing pam wrong\n"); + pam_state = STATE_PAM_IDLE; + unlock_state = STATE_STARTED; + redraw_screen(); + + /* Now free this timeout. */ + ev_timer_stop(main_loop, clear_pam_wrong_timeout); + free(clear_pam_wrong_timeout); + clear_pam_wrong_timeout = NULL; +} + +static void clear_input(void) { + input_position = 0; + clear_password_memory(); + password[input_position] = '\0'; + + /* Hide the unlock indicator after a bit if the password buffer is + * empty. */ + start_clear_indicator_timeout(); + unlock_state = STATE_BACKSPACE_ACTIVE; + redraw_screen(); + unlock_state = STATE_KEY_PRESSED; +} + +static void input_done(void) { + if (clear_pam_wrong_timeout) { + ev_timer_stop(main_loop, clear_pam_wrong_timeout); + free(clear_pam_wrong_timeout); + clear_pam_wrong_timeout = NULL; + } + + pam_state = STATE_PAM_VERIFY; + redraw_screen(); + + if (pam_authenticate(pam_handle, 0) == PAM_SUCCESS) { + DEBUG("successfully authenticated\n"); + clear_password_memory(); + exit(0); + } + + if (debug_mode) + fprintf(stderr, "Authentication failure\n"); + + pam_state = STATE_PAM_WRONG; + clear_input(); + redraw_screen(); + + /* Clear this state after 2 seconds (unless the user enters another + * password during that time). */ + ev_now_update(main_loop); + if ((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); + } + + /* Cancel the clear_indicator_timeout, it would hide the unlock indicator + * too early. */ + stop_clear_indicator_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) { + xkb_state_update_key(xkb_state, event->detail, XKB_KEY_UP); +} + +static void redraw_timeout(EV_P_ ev_timer *w, int revents) { + redraw_screen(); + + ev_timer_stop(main_loop, w); + free(w); +} + +/* + * 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) { + xkb_keysym_t ksym; + char buffer[128]; + int n; + bool ctrl; + + ksym = xkb_state_key_get_one_sym(xkb_state, event->detail); + ctrl = xkb_state_mod_name_is_active(xkb_state, "Control", XKB_STATE_MODS_DEPRESSED); + xkb_state_update_key(xkb_state, event->detail, XKB_KEY_DOWN); + + /* The buffer will be null-terminated, so n >= 2 for 1 actual character. */ + memset(buffer, '\0', sizeof(buffer)); + n = xkb_keysym_to_utf8(ksym, buffer, sizeof(buffer)); + + switch (ksym) { + case XKB_KEY_Return: + case XKB_KEY_KP_Enter: + case XKB_KEY_XF86ScreenSaver: + password[input_position] = '\0'; + unlock_state = STATE_KEY_PRESSED; + redraw_screen(); + input_done(); + return; + + case XKB_KEY_u: + if (ctrl) { + DEBUG("C-u pressed\n"); + clear_input(); + return; + } + break; + + case XKB_KEY_Escape: + clear_input(); + return; + + case XKB_KEY_BackSpace: + if (input_position == 0) + return; + + /* decrement input_position to point to the previous glyph */ + u8_dec(password, &input_position); + password[input_position] = '\0'; + + /* Hide the unlock indicator after a bit if the password buffer is + * empty. */ + start_clear_indicator_timeout(); + unlock_state = STATE_BACKSPACE_ACTIVE; + redraw_screen(); + unlock_state = STATE_KEY_PRESSED; + return; + } + + if ((input_position + 8) >= sizeof(password)) + return; + +#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 (n < 2) + return; + + /* store it in the password array as UTF-8 */ + memcpy(password+input_position, buffer, n-1); + input_position += n-1; + DEBUG("current password = %.*s\n", input_position, password); + + unlock_state = STATE_KEY_ACTIVE; + redraw_screen(); + unlock_state = STATE_KEY_PRESSED; + + struct ev_timer *timeout = calloc(sizeof(struct ev_timer), 1); + if (timeout) { + ev_timer_init(timeout, redraw_timeout, 0.25, 0.); + ev_timer_start(main_loop, timeout); + } + + stop_clear_indicator_timeout(); } +/* + * 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) { + /* We ignore errors — if the new keymap cannot be loaded it’s better if the + * screen stays locked and the user intervenes by using killall i3lock. */ + (void)load_keymap(); +} + +/* + * 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(void) { + xcb_get_geometry_cookie_t geomc; + xcb_get_geometry_reply_t *geom; + geomc = xcb_get_geometry(conn, screen->root); + if ((geom = xcb_get_geometry_reply(conn, geomc, 0)) == NULL) + return; + + if (last_resolution[0] == geom->width && + last_resolution[1] == geom->height) { + free(geom); + return; + } + + last_resolution[0] = geom->width; + last_resolution[1] = geom->height; + + free(geom); + + redraw_screen(); + + uint32_t mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT; + xcb_configure_window(conn, win, mask, last_resolution); + xcb_flush(conn); + + xinerama_query_screens(); + redraw_screen(); +} /* * 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 arry of responses, one for each message */ - if ((*resp = calloc(num_msg, sizeof(struct pam_message))) == NULL) { - perror("calloc"); - return 1; + 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_response))) == 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; + if (debug_mode) + fprintf(stderr, "X11 Error received! sequence 0x%x, error_code = %d\n", + error->sequence, error->error_code); + free(event); + continue; } - 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; + /* Strip off the highest bit (set if the event is generated) */ + int type = (event->response_type & 0x7F); + switch (type) { + case XCB_KEY_PRESS: + handle_key_press((xcb_key_press_event_t*)event); + break; + + case 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); - /* return code is currently not used but should be set to zero */ - resp[c]->resp_retcode = 0; - if ((resp[c]->resp = strdup(passwd)) == NULL) { - perror("strdup"); - return 1; + break; + + case XCB_VISIBILITY_NOTIFY: + handle_visibility_notify((xcb_visibility_notify_event_t*)event); + break; + + case XCB_MAP_NOTIFY: + if (!dont_fork) { + /* After the first MapNotify, we never fork again. We don’t + * expect to get another MapNotify, but better be sure… */ + dont_fork = true; + + /* In the parent process, we exit */ + if (fork() != 0) + exit(0); + + ev_loop_fork(EV_DEFAULT); } + break; + + case XCB_MAPPING_NOTIFY: + handle_mapping_notify((xcb_mapping_notify_event_t*)event); + break; + + case XCB_CONFIGURE_NOTIFY: + handle_screen_resize(); + break; } - return 0; + free(event); + } } int main(int argc, char *argv[]) { - char curs[] = {0, 0, 0, 0, 0, 0, 0, 0}; - char buf[32]; - char *username; - int num, screen; - - unsigned int len; - bool running = true; - - /* By default, fork, don’t beep and don’t turn off monitor */ - bool dont_fork = false; - bool beep = false; - bool dpms = false; - bool xpm_image = false; - char xpm_image_path[256]; - Cursor invisible; - Display *dpy; - KeySym ksym; - Pixmap pmap; - Window root, w; - XColor black, dummy; - XEvent ev; - XSetWindowAttributes wa; - - pam_handle_t *handle; - struct pam_conv conv = {conv_callback, NULL}; - - char opt; - int optind = 0; - static struct option long_options[] = { - {"version", no_argument, NULL, 'v'}, - {"nofork", no_argument, NULL, 'n'}, - {"beep", no_argument, NULL, 'b'}, - {"dpms", no_argument, NULL, 'd'}, - {"image", required_argument, NULL, 'i'}, - {NULL, no_argument, NULL, 0} - }; - - while ((opt = getopt_long(argc, argv, "vnbdi:", long_options, &optind)) != -1) { - switch (opt) { - case 'v': - die("i3lock-"VERSION", © 2009 Michael Stapelberg\n" - "based on slock, which is © 2006-2008 Anselm R Garbe\n"); - case 'n': - dont_fork = true; - break; - case 'b': - beep = true; - break; - case 'd': - dpms = true; - break; - case 'i': - strncpy(xpm_image_path, optarg, 255); - xpm_image = true; - break; - default: - die("i3lock: Unknown option. Syntax: i3lock [-v] [-n] [-b] [-d] [-i image.xpm]\n"); - } - } + char *username; + char *image_path = NULL; + int ret; + struct pam_conv conv = {conv_callback, NULL}; + int curs_choice = CURS_NONE; + int 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'}, + {"image", required_argument, NULL, 'i'}, + {"tiling", no_argument, NULL, 't'}, + {NULL, no_argument, NULL, 0} + }; - if ((username = getenv("USER")) == NULL) - die("USER environment variable not set, please set it.\n"); + if ((username = getenv("USER")) == NULL) + errx(1, "USER environment variable not set, please set it.\n"); - int ret = pam_start("i3lock", username, &conv, &handle); - if (ret != PAM_SUCCESS) - die("PAM: %s\n", pam_strerror(handle, ret)); + while ((o = getopt_long(argc, argv, "hvnbdc:p:ui:t", longopts, &optind)) != -1) { + switch (o) { + case 'v': + errx(EXIT_SUCCESS, "version " VERSION " © 2010-2012 Michael Stapelberg"); + case 'n': + dont_fork = true; + break; + case 'b': + beep = true; + break; + case 'd': + dpms = true; + break; + case 'c': { + char *arg = optarg; - if(!(dpy = XOpenDisplay(0))) - die("i3lock: cannot open display\n"); - screen = DefaultScreen(dpy); - root = RootWindow(dpy, screen); + /* Skip # if present */ + if (arg[0] == '#') + arg++; - if (!dont_fork) { - if (fork() != 0) - return 0; - } + if (strlen(arg) != 6 || sscanf(arg, "%06[0-9a-fA-F]", color) != 1) + errx(1, "color is invalid, it must be given in 3-byte hexadecimal format: rrggbb\n"); - /* init */ - wa.override_redirect = 1; - wa.background_pixel = WhitePixel(dpy, screen); - w = XCreateWindow(dpy, root, 0, 0, DisplayWidth(dpy, screen), DisplayHeight(dpy, screen), - 0, DefaultDepth(dpy, screen), CopyFromParent, - DefaultVisual(dpy, screen), CWOverrideRedirect | CWBackPixel, &wa); - XAllocNamedColor(dpy, DefaultColormap(dpy, screen), "black", &black, &dummy); - pmap = XCreateBitmapFromData(dpy, w, curs, 8, 8); - invisible = XCreatePixmapCursor(dpy, pmap, pmap, &black, &black, 0, 0); - XDefineCursor(dpy, w, invisible); - XMapRaised(dpy, w); - - if(xpm_image && file_exists(xpm_image_path)) - { - GC gc = XDefaultGC(dpy, 0); - int depth = DefaultDepth(dpy, screen); - int disp_width = DisplayWidth(dpy, screen); - int disp_height = DisplayHeight(dpy, screen); - Pixmap pix = XCreatePixmap(dpy, w, disp_width, disp_height, depth); - XpmReadFileToPixmap(dpy, w, xpm_image_path, &pix, 0, 0); - XCopyArea(dpy, pix, w, gc, 0, 0, disp_width, disp_height, 0, 0); + break; } - - for(len = 1000; len; len--) { - if(XGrabPointer(dpy, root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask, - GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess) - break; - usleep(1000); + case 'u': + unlock_indicator = false; + break; + case 'i': + image_path = strdup(optarg); + break; + case 't': + tile = true; + break; + 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]" + " [-i image.png] [-t]" + ); } - if((running = running && (len > 0))) { - for(len = 1000; len; len--) { - if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime) - == GrabSuccess) - break; - usleep(1000); - } - running = (len > 0); + } + + /* 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", pam_strerror(pam_handle, ret)); + +/* Using mlock() as non-super-user seems only possible in Linux. Users of other + * operating systems should use encrypted swap/no swap (or remove the ifdef and + * run i3lock as super-user). */ +#if defined(__linux__) + /* Lock the area where we store the password in memory, we don’t want it to + * be swapped to disk. Since Linux 2.6.9, this does not require any + * privileges, just enough bytes in the RLIMIT_MEMLOCK limit. */ + if (mlock(password, sizeof(password)) != 0) + err(EXIT_FAILURE, "Could not lock page in memory, check RLIMIT_MEMLOCK"); +#endif + + /* Initialize connection to X11 */ + if ((display = XOpenDisplay(NULL)) == NULL) + errx(EXIT_FAILURE, "Could not connect to X11, maybe you need to set DISPLAY?"); + XSetEventQueueOwner(display, XCBOwnsEventQueue); + conn = XGetXCBConnection(display); + + /* Double checking that connection is good and operatable with xcb */ + if (xcb_connection_has_error(conn)) + errx(EXIT_FAILURE, "Could not connect to X11, maybe you need to set DISPLAY?"); + + /* When we cannot initially load the keymap, we better exit */ + if (!load_keymap()) + errx(EXIT_FAILURE, "Could not load keymap"); + + xinerama_init(); + xinerama_query_screens(); + + /* 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))) { + if (!dpmsr->capable) { + if (debug_mode) + fprintf(stderr, "Disabling DPMS, X server not DPMS capable\n"); + dpms = false; + } + free(dpmsr); } - len = 0; - XSync(dpy, False); - - /* main event loop */ - while(running && !XNextEvent(dpy, &ev)) { - if (len == 0 && dpms && DPMSCapable(dpy)) { - DPMSEnable(dpy); - DPMSForceLevel(dpy, DPMSModeOff); - } + } - if(ev.type != KeyPress) - continue; + screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data; - buf[0] = 0; - num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0); - if(IsKeypadKey(ksym)) { - if(ksym == XK_KP_Enter) - ksym = XK_Return; - else if(ksym >= XK_KP_0 && ksym <= XK_KP_9) - ksym = (ksym - XK_KP_0) + XK_0; - } - if(IsFunctionKey(ksym) || - IsKeypadKey(ksym) || - IsMiscFunctionKey(ksym) || - IsPFKey(ksym) || - IsPrivateKeypadKey(ksym)) - continue; - switch(ksym) { - case XK_Return: - passwd[len] = 0; - if ((ret = pam_authenticate(handle, 0)) == PAM_SUCCESS) - running = false; - else { - fprintf(stderr, "PAM: %s\n", pam_strerror(handle, ret)); - if (beep) - XBell(dpy, 100); - } - len = 0; - break; - case XK_Escape: - len = 0; - break; - case XK_BackSpace: - if (len > 0) - len--; - break; - default: - if(num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) { - memcpy(passwd + len, buf, num); - len += num; - } - break; - } + last_resolution[0] = screen->width_in_pixels; + last_resolution[1] = screen->height_in_pixels; + + xcb_change_window_attributes(conn, screen->root, XCB_CW_EVENT_MASK, + (uint32_t[]){ XCB_EVENT_MASK_STRUCTURE_NOTIFY }); + + if (image_path) { + /* Create a pixmap to render on, fill it with the background color */ + img = cairo_image_surface_create_from_png(image_path); + /* In case loading failed, we just pretend no -i was specified. */ + if (cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) { + fprintf(stderr, "Could not load image \"%s\": cairo surface status %d\n", + image_path, cairo_surface_status(img)); + img = NULL; } - XUngrabPointer(dpy, CurrentTime); - XFreePixmap(dpy, pmap); - XDestroyWindow(dpy, w); - XCloseDisplay(dpy); - return 0; + } + + /* Pixmap on which the image is rendered to (if any) */ + xcb_pixmap_t bg_pixmap = draw_image(last_resolution); + + /* open the fullscreen window, already with the correct pixmap in place */ + win = open_fullscreen_window(conn, screen, color, bg_pixmap); + xcb_free_pixmap(conn, bg_pixmap); + + cursor = create_cursor(conn, screen, win, curs_choice); + + grab_pointer_and_keyboard(conn, screen, cursor); + + 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); + + /* Invoke the event callback once to catch all the events which were + * received up until now. ev will only pick up new events (when the X11 + * file descriptor becomes readable). */ + ev_invoke(main_loop, xcb_check, 0); + ev_loop(main_loop, 0); }