X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=i3lock.c;h=4c8668dc4f613653f28599c1fe7bbf5c5505392e;hb=7eb43aeabd7a5eb71927520c427debb45eab05f2;hp=94846bf40f5df3a13b9c9ccc50be51033886f0ae;hpb=c1a34e7aa54a522326fcdd68ed577f05f3c3ea5f;p=i3%2Fi3lock diff --git a/i3lock.c b/i3lock.c index 94846bf..4c8668d 100644 --- a/i3lock.c +++ b/i3lock.c @@ -1,7 +1,7 @@ /* * vim:ts=4:sw=4:expandtab * - * © 2010 Michael Stapelberg + * © 2010-2013 Michael Stapelberg * * See LICENSE for licensing information * @@ -14,44 +14,242 @@ #include #include #include -#include #include -#include -#include #include #include -/* FIXME: can we get rid of this header? */ -#include #include #include +#include +#include +#include +#include +#include +#include -#include "keysym2ucs.h" -#include "ucs2_to_utf8.h" +#include "i3lock.h" #include "xcb.h" #include "cursors.h" - -static xcb_connection_t *conn; -static xcb_key_symbols_t *symbols; -static cairo_t *ctx = NULL; +#include "unlock_indicator.h" +#include "xinerama.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); + +/* We need this for libxkbfile */ +char color[7] = "ffffff"; +int inactivity_timeout = 30; +uint32_t last_resolution[2]; +xcb_window_t win; +static xcb_cursor_t cursor; static pam_handle_t *pam_handle; -static int input_position = 0; -/* holds the password you enter (in UTF-8) */ +int input_position = 0; +/* Holds the password you enter (in UTF-8). */ static char password[512]; -static bool modeswitch_active = false; -static int modeswitchmask; -static int numlockmask; 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; +static struct ev_timer *clear_indicator_timeout; +static struct ev_timer *dpms_timeout; +static struct ev_timer *discard_passwd_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 uint8_t xkb_base_event; +static uint8_t xkb_base_error; + +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)); +} + +static void turn_monitors_on(void) { + if (dpms) + dpms_set_mode(conn, XCB_DPMS_DPMS_MODE_ON); +} + +static void turn_monitors_off(void) { + if (dpms) + dpms_set_mode(conn, XCB_DPMS_DPMS_MODE_OFF); +} + +/* + * 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; +} + +/* + * 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; +} + +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; +} + +/* + * Resets pam_state to STATE_PAM_IDLE 2 seconds after an unsuccessful + * 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. */ + STOP_TIMER(clear_pam_wrong_timeout); +} + +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 input_done() { + /* 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; +} + +static void turn_off_monitors_cb(EV_P_ ev_timer *w, int revents) { if (input_position == 0) - return; + turn_monitors_off(); + + STOP_TIMER(dpms_timeout); +} + +static void discard_passwd_cb(EV_P_ ev_timer *w, int revents) { + clear_input(); + turn_monitors_off(); + STOP_TIMER(discard_passwd_timeout); +} + +static void input_done(void) { + STOP_TIMER(clear_pam_wrong_timeout); + pam_state = STATE_PAM_VERIFY; + redraw_screen(); - /* TODO: change cursor during authentication? */ if (pam_authenticate(pam_handle, 0) == PAM_SUCCESS) { - printf("successfully authenticated\n"); + DEBUG("successfully authenticated\n"); + clear_password_memory(); + /* Turn the screen on, as it may have been turned off + * on release of the 'enter' key. */ + turn_monitors_on(); 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); + START_TIMER(clear_pam_wrong_timeout, TSTAMP_N_SECS(2), clear_pam_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); @@ -59,34 +257,28 @@ static void input_done() { } } -/* - * Called when we should draw the image (if any). - * - */ -static void handle_expose_event() { - if (!ctx) - return; - - cairo_paint(ctx); - 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) { - //printf("releasing %d, state raw = %d\n", event->detail, event->state); + xkb_state_update_key(xkb_state, event->detail, XKB_KEY_UP); +} - /* fix state */ - event->state &= ~numlockmask; +static void redraw_timeout(EV_P_ ev_timer *w, int revents) { + redraw_screen(); + STOP_TIMER(w); +} - xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, event->state); - if (sym == XK_Mode_switch) { - //printf("Mode switch disabled\n"); - modeswitch_active = false; - } +static bool skip_without_validation(void) { + if (input_position != 0) + return false; + + if (skip_repeated_empty_password || ignore_empty_password) + return true; + + return false; } /* @@ -96,45 +288,70 @@ static void handle_key_release(xcb_key_release_event_t *event) { * */ static void handle_key_press(xcb_key_press_event_t *event) { - //printf("keypress %d, state raw = %d\n", event->detail, event->state); - - /* fix state */ - if (modeswitch_active) - event->state |= modeswitchmask; - - /* Apparantly, after activating numlock once, the numlock modifier - * stays turned on (use xev(1) to verify). So, to resolve useful - * keysyms, we remove the numlock flag from the event state */ - event->state &= ~numlockmask; - - if ((input_position + 8) >= sizeof(password)) + 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: + if (skip_without_validation()) { + clear_input(); + return; + } + password[input_position] = '\0'; + unlock_state = STATE_KEY_PRESSED; + redraw_screen(); + input_done(); + skip_repeated_empty_password = true; return; + default: + skip_repeated_empty_password = false; + } - xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, event->state); - switch (sym) { - case XK_Mode_switch: - //printf("Mode switch enabled\n"); - modeswitch_active = true; - return; + switch (ksym) { + case XKB_KEY_u: + if (ctrl) { + DEBUG("C-u pressed\n"); + clear_input(); + return; + } + break; - case XK_Return: - input_done(); - case XK_Escape: - input_position = 0; - password[input_position] = '\0'; + case XKB_KEY_Escape: + clear_input(); return; - case XK_BackSpace: + 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'; - printf("new input position = %d, new password = %s\n", input_position, password); + + /* 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) >= sizeof(password)) + return; + #if 0 /* FIXME: handle all of these? */ printf("is_keypad_key = %d\n", xcb_is_keypad_key(sym)); @@ -146,25 +363,22 @@ static void handle_key_press(xcb_key_press_event_t *event) { 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; - - //printf("sym = %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}; + if (n < 2) + return; /* store it in the password array as UTF-8 */ - input_position += convert_ucs_to_utf8((char*)inp, password + input_position); - password[input_position] = '\0'; - //printf("current password = %s\n", password); + 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 = 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); } /* @@ -176,16 +390,59 @@ static void handle_key_press(xcb_key_press_event_t *event) { * hiding us) gets hidden. * */ -void handle_visibility_notify(xcb_visibility_notify_event_t *event) { - printf("visibility notify (window 0x%08x, state %d)\n", event->window, event->state); +static void handle_visibility_notify(xcb_connection_t *conn, + xcb_visibility_notify_event_t *event) { if (event->state != XCB_VISIBILITY_UNOBSCURED) { - printf("window is obscured (not fully visible), raising\n"); 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. * @@ -197,7 +454,7 @@ static int conv_callback(int num_msg, const struct pam_message **msg, return 1; /* PAM expects an array of responses, one for each message */ - if ((*resp = calloc(num_msg, sizeof(struct pam_message))) == NULL) { + if ((*resp = calloc(num_msg, sizeof(struct pam_response))) == NULL) { perror("calloc"); return 1; } @@ -218,43 +475,180 @@ static int conv_callback(int num_msg, const struct pam_message **msg, 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; + } + + /* 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, but + * only do that after some timeout: maybe user mistyped and + * will type again right away */ + START_TIMER(dpms_timeout, TSTAMP_N_SECS(inactivity_timeout), + turn_off_monitors_cb); + break; + + case XCB_VISIBILITY_NOTIFY: + handle_visibility_notify(conn, (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; + } + + 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 PAM. + * + */ +static void raise_loop(xcb_window_t window) { + xcb_connection_t *conn; + xcb_generic_event_t *event; + int screens; + + if ((conn = xcb_connect(NULL, &screens)) == NULL || + xcb_connection_has_error(conn)) + errx(EXIT_FAILURE, "Cannot open display\n"); + + /* 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[]) { - bool dont_fork = false; - bool dpms = false; - char color[7] = "ffffff"; char *username; char *image_path = NULL; int ret; struct pam_conv conv = {conv_callback, NULL}; - int screen; - cairo_surface_t *img = NULL; - xcb_visualtype_t *vistype; - xcb_generic_event_t *event; - xcb_screen_t *scr; - xcb_window_t win; - xcb_cursor_t cursor; int curs_choice = CURS_NONE; - char o; + 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'}, - {"image", required_argument, NULL, 'i'}, {"color", required_argument, NULL, 'c'}, - {"tiling", no_argument, NULL, 't'}, {"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'}, + {"ignore-empty-password", no_argument, NULL, 'e'}, + {"inactivity-timeout", required_argument, NULL, 'I'}, {NULL, no_argument, NULL, 0} }; if ((username = getenv("USER")) == NULL) - errx(1, "USER environment variable not set, please set it.\n"); + errx(EXIT_FAILURE, "USER environment variable not set, please set it.\n"); - while ((o = getopt_long(argc, argv, "vnbdi:c:tp:", longopts, &optind)) != -1) { + char *optstring = "hvnbdc:p:ui:teI:"; + while ((o = getopt_long(argc, argv, optstring, longopts, &optind)) != -1) { switch (o) { case 'v': - errx(EXIT_SUCCESS, "i3lock © 2010 Michael Stapelberg\n"); + errx(EXIT_SUCCESS, "version " VERSION " © 2010-2012 Michael Stapelberg"); case 'n': dont_fork = true; break; @@ -264,9 +658,13 @@ int main(int argc, char *argv[]) { case 'd': dpms = true; break; - case 'i': - image_path = strdup(optarg); + case 'I': { + int time = 0; + if (sscanf(optarg, "%d", &time) != 1 || time < 0) + errx(EXIT_FAILURE, "invalid timeout, it must be a positive integer\n"); + inactivity_timeout = time; break; + } case 'c': { char *arg = optarg; @@ -275,121 +673,168 @@ int main(int argc, char *argv[]) { 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"); + errx(EXIT_FAILURE, "color is invalid, it must be given in 3-byte hexadecimal format: rrggbb\n"); break; } + case 'u': + unlock_indicator = false; + break; + case 'i': + image_path = strdup(optarg); + break; case 't': - /* TODO: tile image */ + tile = true; break; case 'p': if (!strcmp(optarg, "win")) { curs_choice = CURS_WIN; - } - if (!strcmp(optarg, "default")) { + } else if (!strcmp(optarg, "default")) { curs_choice = CURS_DEFAULT; + } else { + errx(EXIT_FAILURE, "i3lock: Invalid pointer type given. Expected one of \"win\" or \"default\".\n"); } break; + case 'e': + ignore_empty_password = true; + break; + case 0: + if (strcmp(longopts[optind].name, "debug") == 0) + debug_mode = true; + break; default: - errx(1, "i3lock: Unknown option. Syntax: i3lock [-v] [-n] [-b] [-d] [-i image.png] [-c color] [-t] [-p win|default]\n"); + errx(EXIT_FAILURE, "Syntax: i3lock [-v] [-n] [-b] [-d] [-c color] [-u] [-p win|default]" + " [-i image.png] [-t] [-e] [-I]" + ); } } + /* 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) - err(EXIT_FAILURE, "xcb_connect()"); + 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 - if (!dont_fork) { - /* In the parent process, we exit */ - if (fork() != 0) - return 0; - } + /* 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."); + + /* 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)) && !dpmsr->capable) { - fprintf(stderr, "Disabling DPMS, X server not DPMS capable\n"); - dpms = false; + 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); } } - scr = xcb_setup_roots_iterator(xcb_get_setup(conn)).data; - vistype = get_root_visual_type(scr); + screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data; - /* open the fullscreen window and flush immediately afterwards so that X11 - * can generate an expose event while we load the PNG file (so that we are - * ready to handle the expose event immediately afterwards) */ - win = open_fullscreen_window(conn, scr, color); + last_resolution[0] = screen->width_in_pixels; + last_resolution[1] = screen->height_in_pixels; - cursor = create_cursor(conn, scr, win, curs_choice); + xcb_change_window_attributes(conn, screen->root, XCB_CW_EVENT_MASK, + (uint32_t[]){ XCB_EVENT_MASK_STRUCTURE_NOTIFY }); - grab_pointer_and_keyboard(conn, scr, cursor); - - if (image_path) + 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\": %s\n", + image_path, cairo_status_to_string(cairo_surface_status(img))); + img = NULL; + } + } - 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 (img) { - /* Initialize cairo */ - cairo_surface_t *output; - output = cairo_xcb_surface_create(conn, win, vistype, - scr->width_in_pixels, scr->height_in_pixels); - /* TODO: tiling of the image */ - ctx = cairo_create(output); - cairo_set_source_surface(ctx, img, 0, 0); - - handle_expose_event(); + /* 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); + + 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)); + raise_loop(win); + exit(EXIT_SUCCESS); } - if (dpms) - dpms_turn_off_screen(conn); + cursor = create_cursor(conn, screen, win, curs_choice); - while ((event = xcb_wait_for_event(conn))) { - if (event->response_type == 0) - errx(1, "XCB: Invalid event received"); + grab_pointer_and_keyboard(conn, screen, cursor); + /* 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(); - /* Strip off the highest bit (set if the event is generated) */ - int type = (event->response_type & 0x7F); + turn_monitors_off(); - if (type == XCB_EXPOSE) { - handle_expose_event(); - continue; - } - - 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); + /* Initialize the libev event loop. */ + main_loop = EV_DEFAULT; + if (main_loop == NULL) + errx(EXIT_FAILURE, "Could not initialize libev. Bad LIBEV_FLAGS?\n"); - /* 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); + 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); - continue; - } + ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ); + ev_io_start(main_loop, xcb_watcher); - if (type == XCB_VISIBILITY_NOTIFY) { - handle_visibility_notify((xcb_visibility_notify_event_t*)event); - continue; - } + ev_check_init(xcb_check, xcb_check_cb); + ev_check_start(main_loop, xcb_check); - printf("WARNING: unhandled event of type %d\n", type); - } + ev_prepare_init(xcb_prepare, xcb_prepare_cb); + ev_prepare_start(main_loop, xcb_prepare); - return 0; + /* 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); }