-/* See LICENSE file for license details. */
-#define _XOPEN_SOURCE 500
-#if HAVE_SHADOW_H
-#include <shadow.h>
-#endif
-
-#include <ctype.h>
-#include <pwd.h>
-#include <stdarg.h>
-#include <stdlib.h>
+/*
+ * vim:ts=4:sw=4:expandtab
+ *
+ * © 2010-2012 Michael Stapelberg
+ *
+ * See LICENSE for licensing information
+ *
+ */
#include <stdio.h>
+#include <stdlib.h>
#include <string.h>
#include <unistd.h>
-#include <sys/types.h>
-#include <X11/keysym.h>
-#include <X11/Xlib.h>
-#include <X11/Xutil.h>
-
-#if HAVE_BSD_AUTH
-#include <login_cap.h>
-#include <bsd_auth.h>
-#endif
+#include <stdbool.h>
+#include <stdint.h>
+#include <xcb/xcb.h>
+#include <xcb/dpms.h>
+#include <err.h>
+#include <assert.h>
+#include <security/pam_appl.h>
+#include <X11/Xlib-xcb.h>
+#include <getopt.h>
+#include <string.h>
+#include <ev.h>
+#include <sys/mman.h>
+#include <X11/XKBlib.h>
+#include <X11/extensions/XKBfile.h>
+#include <xkbcommon/xkbcommon.h>
+#include <cairo.h>
+#include <cairo/cairo-xcb.h>
-static void
-die(const char *errstr, ...) {
- va_list ap;
-
- va_start(ap, errstr);
- vfprintf(stderr, errstr, ap);
- va_end(ap);
- exit(EXIT_FAILURE);
-}
-
-#ifndef HAVE_BSD_AUTH
-static const char *
-get_password() { /* only run as root */
- const char *rval;
- struct passwd *pw;
-
- if(geteuid() != 0)
- die("slock: cannot retrieve password entry (make sure to suid slock)\n");
- pw = getpwuid(getuid());
- endpwent();
- rval = pw->pw_passwd;
-
-#if HAVE_SHADOW_H
- {
- struct spwd *sp;
- sp = getspnam(getenv("USER"));
- endspent();
- rval = sp->sp_pwdp;
- }
-#endif
+#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;
- /* drop privileges */
- if(setgid(pw->pw_gid) < 0 || setuid(pw->pw_uid) < 0)
- die("slock: cannot drop privileges\n");
- return rval;
+static struct xkb_state *xkb_state;
+static struct xkb_context *xkb_context;
+static struct xkb_keymap *xkb_keymap;
+
+cairo_surface_t *img = NULL;
+bool tile = 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));
}
-#endif
-int
-main(int argc, char **argv) {
- char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
- char buf[32], passwd[256];
- int num, screen;
+/*
+ * 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.
+ *
+ */
+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;
+ }
-#ifndef HAVE_BSD_AUTH
- const char *pws;
-#endif
- unsigned int len;
- Bool running = True;
- Cursor invisible;
- Display *dpy;
- KeySym ksym;
- Pixmap pmap;
- Window root, w;
- XColor black, dummy;
- XEvent ev;
- XSetWindowAttributes wa;
-
- if((argc == 2) && !strcmp("-v", argv[1]))
- die("slock-"VERSION", © 2006-2008 Anselm R Garbe\n");
- else if(argc != 1)
- die("usage: slock [-v]\n");
-
-#ifndef HAVE_BSD_AUTH
- pws = get_password();
+ 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(!(dpy = XOpenDisplay(0)))
- die("slock: cannot open display\n");
- screen = DefaultScreen(dpy);
- root = RootWindow(dpy, screen);
-
- if (fork() != 0)
- return 0;
-
- /* 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);
- for(len = 1000; len; len--) {
- if(XGrabPointer(dpy, root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
- GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess)
- break;
- usleep(1000);
- }
- 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);
- }
- len = 0;
- XSync(dpy, False);
-
- /* main event loop */
- while(running && !XNextEvent(dpy, &ev)) {
- if(ev.type == KeyPress) {
- 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;
-#ifdef HAVE_BSD_AUTH
- running = !auth_userokay(getlogin(), NULL, "auth-xlock", passwd);
-#else
- running = strcmp(crypt(passwd, pws), pws);
+ 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 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;
+ }
+
+ /* 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);
+
+ 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;
+ }
+
+ free(event);
+ }
+}
+
+int main(int argc, char *argv[]) {
+ 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)
+ errx(1, "USER environment variable not set, please set it.\n");
+
+ 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;
+
+ /* Skip # if present */
+ if (arg[0] == '#')
+ arg++;
+
+ if (strlen(arg) != 6 || sscanf(arg, "%06[0-9a-fA-F]", color) != 1)
+ errx(1, "color is invalid, 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':
+ 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]"
+ );
+ }
+ }
+
+ /* 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
- len = 0;
- break;
- case XK_Escape:
- len = 0;
- break;
- case XK_BackSpace:
- if(len)
- --len;
- break;
- default:
- if(num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) {
- memcpy(passwd + len, buf, num);
- len += num;
- }
- break;
- }
- }
- }
- XUngrabPointer(dpy, CurrentTime);
- XFreePixmap(dpy, pmap);
- XDestroyWindow(dpy, w);
- XCloseDisplay(dpy);
- return 0;
+
+ /* 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);
+ }
+ }
+
+ screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
+
+ 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;
+ }
+ }
+
+ /* 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);
}
projects / i3 / i3lock / blobdiff