1 files changed, 1318 insertions, 0 deletions

diff --git a/i3lock.c b/i3lock.c
new file mode 100644
index 0000000..134fdda
--- /dev/null
+++ b/i3lock.c
@@ -0,0 +1,1318 @@
+/*
+ * vim:ts=4:sw=4:expandtab
+ *
+ * © 2010 Michael Stapelberg
+ *
+ * See LICENSE for licensing information
+ *
+ */
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <pwd.h>
+#include <sys/types.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <xcb/xcb.h>
+#include <xcb/xkb.h>
+#include <err.h>
+#include <errno.h>
+#include <assert.h>
+#ifdef __OpenBSD__
+#include <bsd_auth.h>
+#else
+#include <security/pam_appl.h>
+#endif
+#include <getopt.h>
+#include <string.h>
+#include <ev.h>
+#include <sys/mman.h>
+#include <xkbcommon/xkbcommon.h>
+#include <xkbcommon/xkbcommon-compose.h>
+#include <xkbcommon/xkbcommon-x11.h>
+#include <cairo.h>
+#include <cairo/cairo-xcb.h>
+#ifdef __OpenBSD__
+#include <strings.h> /* explicit_bzero(3) */
+#endif
+#include <xcb/xcb_aux.h>
+#include <xcb/randr.h>
+
+#include "i3lock.h"
+#include "xcb.h"
+#include "cursors.h"
+#include "unlock_indicator.h"
+#include "randr.h"
+#include "dpi.h"
+
+#define TSTAMP_N_SECS(n) (n * 1.0)
+#define TSTAMP_N_MINS(n) (60 * TSTAMP_N_SECS(n))
+#define START_TIMER(timer_obj, timeout, callback) \
+    timer_obj = start_timer(timer_obj, timeout, callback)
+#define STOP_TIMER(timer_obj) \
+    timer_obj = stop_timer(timer_obj)
+
+typedef void (*ev_callback_t)(EV_P_ ev_timer *w, int revents);
+static void input_done(void);
+
+char color[7] = "ffffff";
+uint32_t last_resolution[2];
+xcb_window_t win;
+static xcb_cursor_t cursor;
+#ifndef __OpenBSD__
+static pam_handle_t *pam_handle;
+static bool pam_cleanup;
+#endif
+int input_position = 0;
+/* Holds the password you enter (in UTF-8). */
+static char password[512];
+static bool beep = false;
+bool debug_mode = false;
+bool unlock_indicator = true;
+char *modifier_string = NULL;
+static bool dont_fork = false;
+struct ev_loop *main_loop;
+static struct ev_timer *clear_auth_wrong_timeout;
+static struct ev_timer *clear_indicator_timeout;
+static struct ev_timer *discard_passwd_timeout;
+extern unlock_state_t unlock_state;
+extern auth_state_t auth_state;
+int failed_attempts = 0;
+bool show_failed_attempts = false;
+bool retry_verification = false;
+
+static struct xkb_state *xkb_state;
+static struct xkb_context *xkb_context;
+static struct xkb_keymap *xkb_keymap;
+static struct xkb_compose_table *xkb_compose_table;
+static struct xkb_compose_state *xkb_compose_state;
+static uint8_t xkb_base_event;
+static uint8_t xkb_base_error;
+static int randr_base = -1;
+
+cairo_surface_t *img = NULL;
+bool tile = false;
+bool ignore_empty_password = false;
+bool skip_repeated_empty_password = false;
+
+/* isutf, u8_dec © 2005 Jeff Bezanson, public domain */
+#define isutf(c) (((c)&0xC0) != 0x80)
+
+/*
+ * 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));
+}
+
+/*
+ * 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.
+ *
+ */
+static bool load_keymap(void) {
+    if (xkb_context == NULL) {
+        if ((xkb_context = xkb_context_new(0)) == NULL) {
+            fprintf(stderr, "[i3lock] could not create xkbcommon context\n");
+            return false;
+        }
+    }
+
+    xkb_keymap_unref(xkb_keymap);
+
+    int32_t device_id = xkb_x11_get_core_keyboard_device_id(conn);
+    DEBUG("device = %d\n", device_id);
+    if ((xkb_keymap = xkb_x11_keymap_new_from_device(xkb_context, conn, device_id, 0)) == NULL) {
+        fprintf(stderr, "[i3lock] xkb_x11_keymap_new_from_device failed\n");
+        return false;
+    }
+
+    struct xkb_state *new_state =
+        xkb_x11_state_new_from_device(xkb_keymap, conn, device_id);
+    if (new_state == NULL) {
+        fprintf(stderr, "[i3lock] xkb_x11_state_new_from_device failed\n");
+        return false;
+    }
+
+    xkb_state_unref(xkb_state);
+    xkb_state = new_state;
+
+    return true;
+}
+
+/*
+ * Loads the XKB compose table from the given locale.
+ *
+ */
+static bool load_compose_table(const char *locale) {
+    xkb_compose_table_unref(xkb_compose_table);
+
+    if ((xkb_compose_table = xkb_compose_table_new_from_locale(xkb_context, locale, 0)) == NULL) {
+        fprintf(stderr, "[i3lock] xkb_compose_table_new_from_locale failed\n");
+        return false;
+    }
+
+    struct xkb_compose_state *new_compose_state = xkb_compose_state_new(xkb_compose_table, 0);
+    if (new_compose_state == NULL) {
+        fprintf(stderr, "[i3lock] xkb_compose_state_new failed\n");
+        return false;
+    }
+
+    xkb_compose_state_unref(xkb_compose_state);
+    xkb_compose_state = new_compose_state;
+
+    return true;
+}
+
+/*
+ * Clears the memory which stored the password to be a bit safer against
+ * cold-boot attacks.
+ *
+ */
+static void clear_password_memory(void) {
+#ifdef __OpenBSD__
+    /* Use explicit_bzero(3) which was explicitly designed not to be
+     * optimized out by the compiler. */
+    explicit_bzero(password, strlen(password));
+#else
+    /* A volatile pointer to the password buffer to prevent the compiler from
+     * optimizing this out. */
+    volatile char *vpassword = password;
+    for (size_t 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;
+#endif
+}
+
+ev_timer *start_timer(ev_timer *timer_obj, ev_tstamp timeout, ev_callback_t callback) {
+    if (timer_obj) {
+        ev_timer_stop(main_loop, timer_obj);
+        ev_timer_set(timer_obj, timeout, 0.);
+        ev_timer_start(main_loop, timer_obj);
+    } else {
+        /* When there is no memory, we just don’t have a timeout. We cannot
+         * exit() here, since that would effectively unlock the screen. */
+        timer_obj = calloc(sizeof(struct ev_timer), 1);
+        if (timer_obj) {
+            ev_timer_init(timer_obj, callback, timeout, 0.);
+            ev_timer_start(main_loop, timer_obj);
+        }
+    }
+    return timer_obj;
+}
+
+ev_timer *stop_timer(ev_timer *timer_obj) {
+    if (timer_obj) {
+        ev_timer_stop(main_loop, timer_obj);
+        free(timer_obj);
+    }
+    return NULL;
+}
+
+/*
+ * Neccessary calls after ending input via enter or others
+ *
+ */
+static void finish_input(void) {
+    password[input_position] = '\0';
+    unlock_state = STATE_KEY_PRESSED;
+    redraw_screen();
+    input_done();
+}
+
+/*
+ * Resets auth_state to STATE_AUTH_IDLE 2 seconds after an unsuccessful
+ * authentication event.
+ *
+ */
+static void clear_auth_wrong(EV_P_ ev_timer *w, int revents) {
+    DEBUG("clearing auth wrong\n");
+    auth_state = STATE_AUTH_IDLE;
+    redraw_screen();
+
+    /* Clear modifier string. */
+    if (modifier_string != NULL) {
+        free(modifier_string);
+        modifier_string = NULL;
+    }
+
+    /* Now free this timeout. */
+    STOP_TIMER(clear_auth_wrong_timeout);
+
+    /* retry with input done during auth verification */
+    if (retry_verification) {
+        retry_verification = false;
+        finish_input();
+    }
+}
+
+static void clear_indicator_cb(EV_P_ ev_timer *w, int revents) {
+    clear_indicator();
+    STOP_TIMER(clear_indicator_timeout);
+}
+
+static void clear_input(void) {
+    input_position = 0;
+    clear_password_memory();
+    password[input_position] = '\0';
+}
+
+static void discard_passwd_cb(EV_P_ ev_timer *w, int revents) {
+    clear_input();
+    STOP_TIMER(discard_passwd_timeout);
+}
+
+static void input_done(void) {
+    STOP_TIMER(clear_auth_wrong_timeout);
+    auth_state = STATE_AUTH_VERIFY;
+    unlock_state = STATE_STARTED;
+    redraw_screen();
+
+#ifdef __OpenBSD__
+    struct passwd *pw;
+
+    if (!(pw = getpwuid(getuid())))
+        errx(1, "unknown uid %u.", getuid());
+
+    if (auth_userokay(pw->pw_name, NULL, NULL, password) != 0) {
+        DEBUG("successfully authenticated\n");
+        clear_password_memory();
+
+        ev_break(EV_DEFAULT, EVBREAK_ALL);
+        return;
+    }
+#else
+    if (pam_authenticate(pam_handle, 0) == PAM_SUCCESS) {
+        DEBUG("successfully authenticated\n");
+        clear_password_memory();
+
+        /* PAM credentials should be refreshed, this will for example update any kerberos tickets.
+         * Related to credentials pam_end() needs to be called to cleanup any temporary
+         * credentials like kerberos /tmp/krb5cc_pam_* files which may of been left behind if the
+         * refresh of the credentials failed. */
+        pam_setcred(pam_handle, PAM_REFRESH_CRED);
+        pam_cleanup = true;
+
+        ev_break(EV_DEFAULT, EVBREAK_ALL);
+        return;
+    }
+#endif
+
+    if (debug_mode)
+        fprintf(stderr, "Authentication failure\n");
+
+    /* Get state of Caps and Num lock modifiers, to be displayed in
+     * STATE_AUTH_WRONG state */
+    xkb_mod_index_t idx, num_mods;
+    const char *mod_name;
+
+    num_mods = xkb_keymap_num_mods(xkb_keymap);
+
+    for (idx = 0; idx < num_mods; idx++) {
+        if (!xkb_state_mod_index_is_active(xkb_state, idx, XKB_STATE_MODS_EFFECTIVE))
+            continue;
+
+        mod_name = xkb_keymap_mod_get_name(xkb_keymap, idx);
+        if (mod_name == NULL)
+            continue;
+
+        /* Replace certain xkb names with nicer, human-readable ones. */
+        if (strcmp(mod_name, XKB_MOD_NAME_CAPS) == 0)
+            mod_name = "Caps Lock";
+        else if (strcmp(mod_name, XKB_MOD_NAME_ALT) == 0)
+            mod_name = "Alt";
+        else if (strcmp(mod_name, XKB_MOD_NAME_NUM) == 0)
+            mod_name = "Num Lock";
+        else if (strcmp(mod_name, XKB_MOD_NAME_LOGO) == 0)
+            mod_name = "Super";
+
+        char *tmp;
+        if (modifier_string == NULL) {
+            if (asprintf(&tmp, "%s", mod_name) != -1)
+                modifier_string = tmp;
+        } else if (asprintf(&tmp, "%s, %s", modifier_string, mod_name) != -1) {
+            free(modifier_string);
+            modifier_string = tmp;
+        }
+    }
+
+    auth_state = STATE_AUTH_WRONG;
+    failed_attempts += 1;
+    clear_input();
+    if (unlock_indicator)
+        redraw_screen();
+
+    /* Clear this state after 2 seconds (unless the user enters another
+     * password during that time). */
+    ev_now_update(main_loop);
+    START_TIMER(clear_auth_wrong_timeout, TSTAMP_N_SECS(2), clear_auth_wrong);
+
+    /* Cancel the clear_indicator_timeout, it would hide the unlock indicator
+     * too early. */
+    STOP_TIMER(clear_indicator_timeout);
+
+    /* beep on authentication failure, if enabled */
+    if (beep) {
+        xcb_bell(conn, 100);
+        xcb_flush(conn);
+    }
+}
+
+static void redraw_timeout(EV_P_ ev_timer *w, int revents) {
+    redraw_screen();
+    STOP_TIMER(w);
+}
+
+static bool skip_without_validation(void) {
+    if (input_position != 0)
+        return false;
+
+    if (skip_repeated_empty_password || ignore_empty_password)
+        return true;
+
+    return false;
+}
+
+/*
+ * 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;
+    bool composed = false;
+
+    ksym = xkb_state_key_get_one_sym(xkb_state, event->detail);
+    ctrl = xkb_state_mod_name_is_active(xkb_state, XKB_MOD_NAME_CTRL, XKB_STATE_MODS_DEPRESSED);
+
+    /* The buffer will be null-terminated, so n >= 2 for 1 actual character. */
+    memset(buffer, '\0', sizeof(buffer));
+
+    if (xkb_compose_state && xkb_compose_state_feed(xkb_compose_state, ksym) == XKB_COMPOSE_FEED_ACCEPTED) {
+        switch (xkb_compose_state_get_status(xkb_compose_state)) {
+            case XKB_COMPOSE_NOTHING:
+                break;
+            case XKB_COMPOSE_COMPOSING:
+                return;
+            case XKB_COMPOSE_COMPOSED:
+                /* xkb_compose_state_get_utf8 doesn't include the terminating byte in the return value
+             * as xkb_keysym_to_utf8 does. Adding one makes the variable n consistent. */
+                n = xkb_compose_state_get_utf8(xkb_compose_state, buffer, sizeof(buffer)) + 1;
+                ksym = xkb_compose_state_get_one_sym(xkb_compose_state);
+                composed = true;
+                break;
+            case XKB_COMPOSE_CANCELLED:
+                xkb_compose_state_reset(xkb_compose_state);
+                return;
+        }
+    }
+
+    if (!composed) {
+        n = xkb_keysym_to_utf8(ksym, buffer, sizeof(buffer));
+    }
+
+    switch (ksym) {
+        case XKB_KEY_j:
+        case XKB_KEY_m:
+        case XKB_KEY_Return:
+        case XKB_KEY_KP_Enter:
+        case XKB_KEY_XF86ScreenSaver:
+            if ((ksym == XKB_KEY_j || ksym == XKB_KEY_m) && !ctrl)
+                break;
+
+            if (auth_state == STATE_AUTH_WRONG) {
+                retry_verification = true;
+                return;
+            }
+
+            if (skip_without_validation()) {
+                clear_input();
+                return;
+            }
+            finish_input();
+            skip_repeated_empty_password = true;
+            return;
+        default:
+            skip_repeated_empty_password = false;
+            // A new password is being entered, but a previous one is pending.
+            // Discard the old one and clear the retry_verification flag.
+            if (retry_verification) {
+                retry_verification = false;
+                clear_input();
+            }
+    }
+
+    switch (ksym) {
+        case XKB_KEY_u:
+        case XKB_KEY_Escape:
+            if ((ksym == XKB_KEY_u && ctrl) ||
+                ksym == XKB_KEY_Escape) {
+                DEBUG("C-u pressed\n");
+                clear_input();
+                /* Also hide the unlock indicator */
+                if (unlock_indicator)
+                    clear_indicator();
+                return;
+            }
+            break;
+
+        case XKB_KEY_Delete:
+        case XKB_KEY_KP_Delete:
+            /* Deleting forward doesn’t make sense, as i3lock doesn’t allow you
+             * to move the cursor when entering a password. We need to eat this
+             * key press so that it won’t be treated as part of the password,
+             * see issue #50. */
+            return;
+
+        case XKB_KEY_h:
+        case XKB_KEY_BackSpace:
+            if (ksym == XKB_KEY_h && !ctrl)
+                break;
+
+            if (input_position == 0) {
+                START_TIMER(clear_indicator_timeout, 1.0, clear_indicator_cb);
+                unlock_state = STATE_NOTHING_TO_DELETE;
+                redraw_screen();
+                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_TIMER(clear_indicator_timeout, 1.0, clear_indicator_cb);
+            unlock_state = STATE_BACKSPACE_ACTIVE;
+            redraw_screen();
+            unlock_state = STATE_KEY_PRESSED;
+            return;
+    }
+
+    if ((input_position + 8) >= (int)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);
+
+    if (unlock_indicator) {
+        unlock_state = STATE_KEY_ACTIVE;
+        redraw_screen();
+        unlock_state = STATE_KEY_PRESSED;
+
+        struct ev_timer *timeout = NULL;
+        START_TIMER(timeout, TSTAMP_N_SECS(0.25), redraw_timeout);
+        STOP_TIMER(clear_indicator_timeout);
+    }
+
+    START_TIMER(discard_passwd_timeout, TSTAMP_N_MINS(3), discard_passwd_cb);
+}
+
+/*
+ * 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_connection_t *conn,
+                                     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.
+ *
+ * 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.
+ *
+ */
+static void process_xkb_event(xcb_generic_event_t *gevent) {
+    union xkb_event {
+        struct {
+            uint8_t response_type;
+            uint8_t xkbType;
+            uint16_t sequence;
+            xcb_timestamp_t time;
+            uint8_t deviceID;
+        } any;
+        xcb_xkb_new_keyboard_notify_event_t new_keyboard_notify;
+        xcb_xkb_map_notify_event_t map_notify;
+        xcb_xkb_state_notify_event_t state_notify;
+    } *event = (union xkb_event *)gevent;
+
+    DEBUG("process_xkb_event for device %d\n", event->any.deviceID);
+
+    if (event->any.deviceID != xkb_x11_get_core_keyboard_device_id(conn))
+        return;
+
+    /*
+     * XkbNewKkdNotify and XkbMapNotify together capture all sorts of keymap
+     * updates (e.g. xmodmap, xkbcomp, setxkbmap), with minimal redundent
+     * recompilations.
+     */
+    switch (event->any.xkbType) {
+        case XCB_XKB_NEW_KEYBOARD_NOTIFY:
+            if (event->new_keyboard_notify.changed & XCB_XKB_NKN_DETAIL_KEYCODES)
+                (void)load_keymap();
+            break;
+
+        case XCB_XKB_MAP_NOTIFY:
+            (void)load_keymap();
+            break;
+
+        case XCB_XKB_STATE_NOTIFY:
+            xkb_state_update_mask(xkb_state,
+                                  event->state_notify.baseMods,
+                                  event->state_notify.latchedMods,
+                                  event->state_notify.lockedMods,
+                                  event->state_notify.baseGroup,
+                                  event->state_notify.latchedGroup,
+                                  event->state_notify.lockedGroup);
+            break;
+    }
+}
+
+/*
+ * 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);
+
+    randr_query(screen->root);
+    redraw_screen();
+}
+
+static ssize_t read_raw_image_native(uint32_t *dest, FILE *src, size_t width, size_t height, int pixstride) {
+    ssize_t count = 0;
+    for (size_t y = 0; y < height; y++) {
+        size_t n = fread(&dest[y * pixstride], 1, width * 4, src);
+        count += n;
+        if (n < (size_t)(width * 4))
+            break;
+    }
+
+    return count;
+}
+
+struct raw_pixel_format {
+    int bpp;
+    int red;
+    int green;
+    int blue;
+};
+
+static ssize_t read_raw_image_fmt(uint32_t *dest, FILE *src, size_t width, size_t height, int pixstride,
+                                  struct raw_pixel_format fmt) {
+    unsigned char *buf = malloc(width * fmt.bpp);
+    if (buf == NULL)
+        return -1;
+
+    ssize_t count = 0;
+    for (size_t y = 0; y < height; y++) {
+        size_t n = fread(buf, 1, width * fmt.bpp, src);
+        count += n;
+        if (n < (size_t)(width * fmt.bpp))
+            break;
+
+        for (size_t x = 0; x < width; ++x) {
+            int idx = x * fmt.bpp;
+            dest[y * pixstride + x] = 0 |
+                                      (buf[idx + fmt.red]) << 16 |
+                                      (buf[idx + fmt.green]) << 8 |
+                                      (buf[idx + fmt.blue]);
+        }
+    }
+
+    free(buf);
+    return count;
+}
+
+// Pre-defind pixel formats (<bytes per pixel>, <red pixel>, <green pixel>, <blue pixel>)
+static const struct raw_pixel_format raw_fmt_rgb = {3, 0, 1, 2};
+static const struct raw_pixel_format raw_fmt_rgbx = {4, 0, 1, 2};
+static const struct raw_pixel_format raw_fmt_xrgb = {4, 1, 2, 3};
+static const struct raw_pixel_format raw_fmt_bgr = {3, 2, 1, 0};
+static const struct raw_pixel_format raw_fmt_bgrx = {4, 2, 1, 0};
+static const struct raw_pixel_format raw_fmt_xbgr = {4, 3, 2, 1};
+
+static cairo_surface_t *read_raw_image(const char *image_path, const char *image_raw_format) {
+    cairo_surface_t *img;
+
+#define RAW_PIXFMT_MAXLEN 6
+#define STRINGIFY1(x) #x
+#define STRINGIFY(x) STRINGIFY1(x)
+    /* Parse format as <width>x<height>:<pixfmt> */
+    char pixfmt[RAW_PIXFMT_MAXLEN + 1];
+    size_t w, h;
+    const char *fmt = "%zux%zu:%" STRINGIFY(RAW_PIXFMT_MAXLEN) "s";
+    if (sscanf(image_raw_format, fmt, &w, &h, pixfmt) != 3) {
+        fprintf(stderr, "Invalid image format: \"%s\"\n", image_raw_format);
+        return NULL;
+    }
+#undef RAW_PIXFMT_MAXLEN
+#undef STRINGIFY1
+#undef STRINGIFY
+
+    /* Create image surface */
+    img = cairo_image_surface_create(CAIRO_FORMAT_RGB24, w, h);
+    if (cairo_surface_status(img) != CAIRO_STATUS_SUCCESS) {
+        fprintf(stderr, "Could not create surface: %s\n",
+                cairo_status_to_string(cairo_surface_status(img)));
+        return NULL;
+    }
+    cairo_surface_flush(img);
+
+    /* Use uint32_t* because cairo uses native endianness */
+    uint32_t *data = (uint32_t *)cairo_image_surface_get_data(img);
+    const int pixstride = cairo_image_surface_get_stride(img) / 4;
+
+    FILE *f = fopen(image_path, "r");
+    if (f == NULL) {
+        fprintf(stderr, "Could not open image \"%s\": %s\n",
+                image_path, strerror(errno));
+        cairo_surface_destroy(img);
+        return NULL;
+    }
+
+    /* Read the image, respecting cairo's stride, according to the pixfmt */
+    ssize_t size, count;
+    if (strcmp(pixfmt, "native") == 0) {
+        /* If the pixfmt is 'native', just read each line directly into the buffer */
+        size = w * h * 4;
+        count = read_raw_image_native(data, f, w, h, pixstride);
+    } else {
+        const struct raw_pixel_format *fmt = NULL;
+
+        if (strcmp(pixfmt, "rgb") == 0)
+            fmt = &raw_fmt_rgb;
+        else if (strcmp(pixfmt, "rgbx") == 0)
+            fmt = &raw_fmt_rgbx;
+        else if (strcmp(pixfmt, "xrgb") == 0)
+            fmt = &raw_fmt_xrgb;
+        else if (strcmp(pixfmt, "bgr") == 0)
+            fmt = &raw_fmt_bgr;
+        else if (strcmp(pixfmt, "bgrx") == 0)
+            fmt = &raw_fmt_bgrx;
+        else if (strcmp(pixfmt, "xbgr") == 0)
+            fmt = &raw_fmt_xbgr;
+
+        if (fmt == NULL) {
+            fprintf(stderr, "Unknown raw pixel format: %s\n", pixfmt);
+            fclose(f);
+            cairo_surface_destroy(img);
+            return NULL;
+        }
+
+        size = w * h * fmt->bpp;
+        count = read_raw_image_fmt(data, f, w, h, pixstride, *fmt);
+    }
+
+    cairo_surface_mark_dirty(img);
+
+    if (count < size) {
+        if (count < 0 || ferror(f)) {
+            fprintf(stderr, "Failed to read image \"%s\": %s\n",
+                    image_path, strerror(errno));
+            fclose(f);
+            cairo_surface_destroy(img);
+            return NULL;
+        } else {
+            /* Print a warning if the file contains less data than expected,
+             * but don't abort. It's useful to see how the image looks even if it's wrong. */
+            fprintf(stderr, "Warning: expected to read %zi bytes from \"%s\", read %zi\n",
+                    size, image_path, count);
+        }
+    }
+
+    fclose(f);
+    return img;
+}
+
+static bool verify_png_image(const char *image_path) {
+    if (!image_path) {
+        return false;
+    }
+
+    /* Check file exists and has correct PNG header */
+    FILE *png_file = fopen(image_path, "r");
+    if (png_file == NULL) {
+        fprintf(stderr, "Image file path \"%s\" cannot be opened: %s\n", image_path, strerror(errno));
+        return false;
+    }
+    unsigned char png_header[8];
+    memset(png_header, '\0', sizeof(png_header));
+    int bytes_read = fread(png_header, 1, sizeof(png_header), png_file);
+    fclose(png_file);
+    if (bytes_read != sizeof(png_header)) {
+        fprintf(stderr, "Could not read PNG header from \"%s\"\n", image_path);
+        return false;
+    }
+
+    // Check PNG header according to the specification, available at:
+    // https://www.w3.org/TR/2003/REC-PNG-20031110/#5PNG-file-signature
+    static unsigned char PNG_REFERENCE_HEADER[8] = {137, 80, 78, 71, 13, 10, 26, 10};
+    if (memcmp(PNG_REFERENCE_HEADER, png_header, sizeof(png_header)) != 0) {
+        fprintf(stderr, "File \"%s\" does not start with a PNG header. i3lock currently only supports loading PNG files.\n", image_path);
+        return false;
+    }
+    return true;
+}
+
+#ifndef __OpenBSD__
+/*
+ * 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_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;
+}
+#endif
+
+/*
+ * 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);
+}
+
+/*
+ * Try closing logind sleep lock fd passed over from xss-lock, in case we're
+ * being run from there.
+ *
+ */
+static void maybe_close_sleep_lock_fd(void) {
+    const char *sleep_lock_fd = getenv("XSS_SLEEP_LOCK_FD");
+    char *endptr;
+    if (sleep_lock_fd && *sleep_lock_fd != 0) {
+        long int fd = strtol(sleep_lock_fd, &endptr, 10);
+        if (*endptr == 0) {
+            close(fd);
+        }
+    }
+}
+
+/*
+ * 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;
+
+    if (xcb_connection_has_error(conn))
+        errx(EXIT_FAILURE, "X11 connection broke, did your server terminate?");
+
+    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;
+        }
+
+        /* 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_VISIBILITY_NOTIFY:
+                handle_visibility_notify(conn, (xcb_visibility_notify_event_t *)event);
+                break;
+
+            case XCB_MAP_NOTIFY:
+                maybe_close_sleep_lock_fd();
+                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_CONFIGURE_NOTIFY:
+                handle_screen_resize();
+                break;
+
+            default:
+                if (type == xkb_base_event) {
+                    process_xkb_event(event);
+                }
+                if (randr_base > -1 &&
+                    type == randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY) {
+                    randr_query(screen->root);
+                    handle_screen_resize();
+                }
+        }
+
+        free(event);
+    }
+}
+
+/*
+ * This function is called from a fork()ed child and will raise the i3lock
+ * window when the window is obscured, even when the main i3lock process is
+ * blocked due to the authentication backend.
+ *
+ */
+static void raise_loop(xcb_window_t window) {
+    xcb_connection_t *conn;
+    xcb_generic_event_t *event;
+    int screens;
+
+    if (xcb_connection_has_error((conn = xcb_connect(NULL, &screens))) > 0)
+        errx(EXIT_FAILURE, "Cannot open display");
+
+    /* We need to know about the window being obscured or getting destroyed. */
+    xcb_change_window_attributes(conn, window, XCB_CW_EVENT_MASK,
+                                 (uint32_t[]){
+                                     XCB_EVENT_MASK_VISIBILITY_CHANGE |
+                                     XCB_EVENT_MASK_STRUCTURE_NOTIFY});
+    xcb_flush(conn);
+
+    DEBUG("Watching window 0x%08x\n", window);
+    while ((event = xcb_wait_for_event(conn)) != NULL) {
+        if (event->response_type == 0) {
+            xcb_generic_error_t *error = (xcb_generic_error_t *)event;
+            DEBUG("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);
+        DEBUG("Read event of type %d\n", type);
+        switch (type) {
+            case XCB_VISIBILITY_NOTIFY:
+                handle_visibility_notify(conn, (xcb_visibility_notify_event_t *)event);
+                break;
+            case XCB_UNMAP_NOTIFY:
+                DEBUG("UnmapNotify for 0x%08x\n", (((xcb_unmap_notify_event_t *)event)->window));
+                if (((xcb_unmap_notify_event_t *)event)->window == window)
+                    exit(EXIT_SUCCESS);
+                break;
+            case XCB_DESTROY_NOTIFY:
+                DEBUG("DestroyNotify for 0x%08x\n", (((xcb_destroy_notify_event_t *)event)->window));
+                if (((xcb_destroy_notify_event_t *)event)->window == window)
+                    exit(EXIT_SUCCESS);
+                break;
+            default:
+                DEBUG("Unhandled event type %d\n", type);
+                break;
+        }
+        free(event);
+    }
+}
+
+int main(int argc, char *argv[]) {
+    struct passwd *pw;
+    char *username;
+    char *image_path = NULL;
+    char *image_raw_format = NULL;
+#ifndef __OpenBSD__
+    int ret;
+    struct pam_conv conv = {conv_callback, NULL};
+#endif
+    int curs_choice = CURS_NONE;
+    int o;
+    int longoptind = 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'},
+        {"raw", required_argument, NULL, 0},
+        {"tiling", no_argument, NULL, 't'},
+        {"ignore-empty-password", no_argument, NULL, 'e'},
+        {"inactivity-timeout", required_argument, NULL, 'I'},
+        {"show-failed-attempts", no_argument, NULL, 'f'},
+        {NULL, no_argument, NULL, 0}};
+
+    if ((pw = getpwuid(getuid())) == NULL)
+        err(EXIT_FAILURE, "getpwuid() failed");
+    if ((username = pw->pw_name) == NULL)
+        errx(EXIT_FAILURE, "pw->pw_name is NULL.");
+
+    char *optstring = "hvnbdc:p:ui:teI:f";
+    while ((o = getopt_long(argc, argv, optstring, longopts, &longoptind)) != -1) {
+        switch (o) {
+            case 'v':
+                errx(EXIT_SUCCESS, "version " I3LOCK_VERSION " © 2010 Michael Stapelberg");
+            case 'n':
+                dont_fork = true;
+                break;
+            case 'b':
+                beep = true;
+                break;
+            case 'd':
+                fprintf(stderr, "DPMS support has been removed from i3lock. Please see the manpage i3lock(1).\n");
+                break;
+            case 'I': {
+                fprintf(stderr, "Inactivity timeout only makes sense with DPMS, which was removed. Please see the manpage i3lock(1).\n");
+                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(EXIT_FAILURE, "color is invalid, it must be given in 3-byte hexadecimal format: rrggbb");
+
+                break;
+            }
+            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(EXIT_FAILURE, "i3lock: Invalid pointer type given. Expected one of \"win\" or \"default\".");
+                }
+                break;
+            case 'e':
+                ignore_empty_password = true;
+                break;
+            case 0:
+                if (strcmp(longopts[longoptind].name, "debug") == 0)
+                    debug_mode = true;
+                else if (strcmp(longopts[longoptind].name, "raw") == 0)
+                    image_raw_format = strdup(optarg);
+                break;
+            case 'f':
+                show_failed_attempts = true;
+                break;
+            default:
+                errx(EXIT_FAILURE, "Syntax: i3lock [-v] [-n] [-b] [-d] [-c color] [-u] [-p win|default]"
+                                   " [-i image.png] [-t] [-e] [-I timeout] [-f]");
+        }
+    }
+
+    /* We need (relatively) random numbers for highlighting a random part of
+     * the unlock indicator upon keypresses. */
+    srand(time(NULL));
+
+#ifndef __OpenBSD__
+    /* Initialize PAM */
+    if ((ret = pam_start("i3lock", username, &conv, &pam_handle)) != PAM_SUCCESS)
+        errx(EXIT_FAILURE, "PAM: %s", pam_strerror(pam_handle, ret));
+
+    if ((ret = pam_set_item(pam_handle, PAM_TTY, getenv("DISPLAY"))) != PAM_SUCCESS)
+        errx(EXIT_FAILURE, "PAM: %s", pam_strerror(pam_handle, ret));
+#endif
+
+/* 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).
+ * Alas, swap is encrypted by default on OpenBSD so swapping out
+ * is not necessarily an issue. */
+#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
+
+    /* Double checking that connection is good and operatable with xcb */
+    int screennr;
+    if ((conn = xcb_connect(NULL, &screennr)) == NULL ||
+        xcb_connection_has_error(conn))
+        errx(EXIT_FAILURE, "Could not connect to X11, maybe you need to set DISPLAY?");
+
+    if (xkb_x11_setup_xkb_extension(conn,
+                                    XKB_X11_MIN_MAJOR_XKB_VERSION,
+                                    XKB_X11_MIN_MINOR_XKB_VERSION,
+                                    0,
+                                    NULL,
+                                    NULL,
+                                    &xkb_base_event,
+                                    &xkb_base_error) != 1)
+        errx(EXIT_FAILURE, "Could not setup XKB extension.");
+
+    static const xcb_xkb_map_part_t required_map_parts =
+        (XCB_XKB_MAP_PART_KEY_TYPES |
+         XCB_XKB_MAP_PART_KEY_SYMS |
+         XCB_XKB_MAP_PART_MODIFIER_MAP |
+         XCB_XKB_MAP_PART_EXPLICIT_COMPONENTS |
+         XCB_XKB_MAP_PART_KEY_ACTIONS |
+         XCB_XKB_MAP_PART_VIRTUAL_MODS |
+         XCB_XKB_MAP_PART_VIRTUAL_MOD_MAP);
+
+    static const xcb_xkb_event_type_t required_events =
+        (XCB_XKB_EVENT_TYPE_NEW_KEYBOARD_NOTIFY |
+         XCB_XKB_EVENT_TYPE_MAP_NOTIFY |
+         XCB_XKB_EVENT_TYPE_STATE_NOTIFY);
+
+    xcb_xkb_select_events(
+        conn,
+        xkb_x11_get_core_keyboard_device_id(conn),
+        required_events,
+        0,
+        required_events,
+        required_map_parts,
+        required_map_parts,
+        0);
+
+    /* When we cannot initially load the keymap, we better exit */
+    if (!load_keymap())
+        errx(EXIT_FAILURE, "Could not load keymap");
+
+    const char *locale = getenv("LC_ALL");
+    if (!locale || !*locale)
+        locale = getenv("LC_CTYPE");
+    if (!locale || !*locale)
+        locale = getenv("LANG");
+    if (!locale || !*locale) {
+        if (debug_mode)
+            fprintf(stderr, "Can't detect your locale, fallback to C\n");
+        locale = "C";
+    }
+
+    load_compose_table(locale);
+
+    screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
+
+    init_dpi();
+
+    randr_init(&randr_base, screen->root);
+    randr_query(screen->root);
+
+    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_raw_format != NULL && image_path != NULL) {
+        /* Read image. 'read_raw_image' returns NULL on error,
+         * so we don't have to handle errors here. */
+        img = read_raw_image(image_path, image_raw_format);
+    } else if (verify_png_image(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\": %s\n",
+                    image_path, cairo_status_to_string(cairo_surface_status(img)));
+            img = NULL;
+        }
+    }
+
+    free(image_path);
+    free(image_raw_format);
+
+    /* Pixmap on which the image is rendered to (if any) */
+    xcb_pixmap_t bg_pixmap = draw_image(last_resolution);
+
+    xcb_window_t stolen_focus = find_focused_window(conn, screen->root);
+
+    /* 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);
+
+    /* Display the "locking…" message while trying to grab the pointer/keyboard. */
+    auth_state = STATE_AUTH_LOCK;
+    if (!grab_pointer_and_keyboard(conn, screen, cursor, 1000)) {
+        DEBUG("stole focus from X11 window 0x%08x\n", stolen_focus);
+
+        /* Set the focus to i3lock, possibly closing context menus which would
+         * otherwise prevent us from grabbing keyboard/pointer.
+         *
+         * We cannot use set_focused_window because _NET_ACTIVE_WINDOW only
+         * works for managed windows, but i3lock uses an unmanaged window
+         * (override_redirect=1). */
+        xcb_set_input_focus(conn, XCB_INPUT_FOCUS_PARENT /* revert_to */, win, XCB_CURRENT_TIME);
+        if (!grab_pointer_and_keyboard(conn, screen, cursor, 9000)) {
+            auth_state = STATE_I3LOCK_LOCK_FAILED;
+            redraw_screen();
+            sleep(1);
+            errx(EXIT_FAILURE, "Cannot grab pointer/keyboard");
+        }
+    }
+
+    pid_t pid = fork();
+    /* The pid == -1 case is intentionally ignored here:
+     * While the child process is useful for preventing other windows from
+     * popping up while i3lock blocks, it is not critical. */
+    if (pid == 0) {
+        /* Child */
+        close(xcb_get_file_descriptor(conn));
+        maybe_close_sleep_lock_fd();
+        raise_loop(win);
+        exit(EXIT_SUCCESS);
+    }
+
+    /* Load the keymap again to sync the current modifier state. Since we first
+     * loaded the keymap, there might have been changes, but starting from now,
+     * we should get all key presses/releases due to having grabbed the
+     * keyboard. */
+    (void)load_keymap();
+
+    /* Initialize the libev event loop. */
+    main_loop = EV_DEFAULT;
+    if (main_loop == NULL)
+        errx(EXIT_FAILURE, "Could not initialize libev. Bad LIBEV_FLAGS?");
+
+    /* Explicitly call the screen redraw in case "locking…" message was displayed */
+    auth_state = STATE_AUTH_IDLE;
+    redraw_screen();
+
+    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);
+
+#ifndef __OpenBSD__
+    if (pam_cleanup) {
+        pam_end(pam_handle, PAM_SUCCESS);
+    }
+#endif
+
+    if (stolen_focus == XCB_NONE) {
+        return 0;
+    }
+
+    DEBUG("restoring focus to X11 window 0x%08x\n", stolen_focus);
+    xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
+    xcb_ungrab_keyboard(conn, XCB_CURRENT_TIME);
+    xcb_destroy_window(conn, win);
+    set_focused_window(conn, screen->root, stolen_focus);
+    xcb_aux_sync(conn);
+
+    return 0;
+}