/*
- * vim:ts=8:expandtab
+ * vim:ts=4:sw=4:expandtab
*
- * i3lock - an improved version of slock
+ * © 2010-2013 Michael Stapelberg
*
- * i3lock © 2009 Michael Stapelberg and contributors
- * slock © 2006-2008 Anselm R Garbe
- *
- * See file LICENSE for license information.
- *
- * Note that on any error (calloc is out of memory for example)
- * we do not do anything so that the user can fix the error by
- * himself (kill X to get more free memory or stop some other
- * program using SSH/console).
+ * See LICENSE for licensing information
*
*/
-#define _XOPEN_SOURCE 500
-
-#include <ctype.h>
-#include <stdarg.h>
-#include <stdlib.h>
#include <stdio.h>
-#include <stdint.h>
+#include <stdlib.h>
#include <string.h>
-#include <math.h>
#include <unistd.h>
-#include <sys/types.h>
-#include <X11/keysym.h>
-#include <X11/Xlib.h>
-#include <X11/Xutil.h>
-#include <X11/xpm.h>
-#include <X11/extensions/dpms.h>
#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 <getopt.h>
+#include <string.h>
+#include <ev.h>
+#include <sys/mman.h>
+#include <xkbcommon/xkbcommon.h>
+#include <xkbcommon/xkbcommon-x11.h>
+#include <cairo.h>
+#include <cairo/cairo-xcb.h>
+
+#include "i3lock.h"
+#include "xcb.h"
+#include "cursors.h"
+#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;
+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;
+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)
-#include <security/pam_appl.h>
+/*
+ * 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 char passwd[256];
+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);
+}
/*
- * displays an xpm image tiled over the whole screen
- * (the image will be visible on all screens
- * when using a multi monitor setup)
+ * 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.
*
*/
-void tiling_image(XpmImage *image,
- int disp_height, int disp_width,
- Display *dpy,
- Pixmap pix,
- Window w,
- GC gc) {
- int rows = (int)ceil(disp_height / (float)image->height),
- cols = (int)ceil(disp_width / (float)image->width);
-
- int x = 0,
- y = 0;
-
- for(y = 0; y < rows; y++) {
- for(x = 0; x < cols; x++) {
- XCopyArea(dpy, pix, w, gc, 0, 0, image->width, image->height, image->width * x, image->height * y);
+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;
}
}
-}
-static void die(const char *errstr, ...) {
- va_list ap;
+ xkb_keymap_unref(xkb_keymap);
- va_start(ap, errstr);
- vfprintf(stderr, errstr, ap);
- va_end(ap);
- exit(EXIT_FAILURE);
+ 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;
}
/*
- * Returns the colorpixel to use for the given hex color (think of HTML).
- *
- * The hex_color may not start with #, for example FF00FF works.
+ * Clears the memory which stored the password to be a bit safer against
+ * cold-boot attacks.
*
- * NOTE that get_colorpixel() does _NOT_ check the given color code for validity.
- * This has to be done by the caller.
+ */
+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.
*
*/
-uint32_t get_colorpixel(char *hex) {
- char strgroups[3][3] = {{hex[0], hex[1], '\0'},
- {hex[2], hex[3], '\0'},
- {hex[4], hex[5], '\0'}};
- uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
- (strtol(strgroups[1], NULL, 16)),
- (strtol(strgroups[2], NULL, 16))};
-
- return (rgb16[0] << 16) + (rgb16[1] << 8) + rgb16[2];
+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';
+
+ /* 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)
+ 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();
+
+ if (pam_authenticate(pam_handle, 0) == PAM_SUCCESS) {
+ 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);
+ xcb_flush(conn);
+ }
}
/*
- * Check if given file can be opened => exists
+ * Called when the user releases a key. We need to leave the Mode_switch
+ * state when the user releases the Mode_switch key.
*
*/
-bool file_exists(const char *filename)
-{
- FILE * file = fopen(filename, "r");
- if(file)
- {
- fclose(file);
- return true;
- }
+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();
+ 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;
}
/*
- * Puts the given XPM error code to stderr
+ * 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.
*
*/
-void print_xpm_error(int err)
-{
- switch (err) {
- case XpmColorError:
- fprintf(stderr, "XPM: Could not parse or alloc requested color\n");
- break;
- case XpmOpenFailed:
- fprintf(stderr, "XPM: Cannot open file\n");
- break;
- case XpmFileInvalid:
- fprintf(stderr, "XPM: invalid XPM file\n");
- break;
- case XpmNoMemory:
- fprintf(stderr, "XPM: Not enough memory\n");
- break;
- case XpmColorFailed:
- fprintf(stderr, "XPM: Color not found\n");
- break;
+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:
+ 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;
+ }
+
+ switch (ksym) {
+ 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_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));
+ printf("is_private_keypad_key = %d\n", xcb_is_private_keypad_key(sym));
+ printf("xcb_is_cursor_key = %d\n", xcb_is_cursor_key(sym));
+ printf("xcb_is_pf_key = %d\n", xcb_is_pf_key(sym));
+ printf("xcb_is_function_key = %d\n", xcb_is_function_key(sym));
+ printf("xcb_is_misc_function_key = %d\n", xcb_is_misc_function_key(sym));
+ printf("xcb_is_modifier_key = %d\n", xcb_is_modifier_key(sym));
+#endif
+
+ if (n < 2)
+ return;
+
+ /* store it in the password array as UTF-8 */
+ memcpy(password+input_position, buffer, n-1);
+ input_position += n-1;
+ DEBUG("current password = %.*s\n", input_position, password);
+
+ unlock_state = STATE_KEY_ACTIVE;
+ redraw_screen();
+ unlock_state = STATE_KEY_PRESSED;
+
+ struct ev_timer *timeout = 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.
+ *
+ */
+static void handle_mapping_notify(xcb_mapping_notify_event_t *event) {
+ /* We ignore errors — if the new keymap cannot be loaded it’s better if the
+ * screen stays locked and the user intervenes by using killall i3lock. */
+ (void)load_keymap();
+}
+
+/*
+ * Called when the properties on the root window change, e.g. when the screen
+ * resolution changes. If so we update the window to cover the whole screen
+ * and also redraw the image, if any.
+ *
+ */
+void handle_screen_resize(void) {
+ xcb_get_geometry_cookie_t geomc;
+ xcb_get_geometry_reply_t *geom;
+ geomc = xcb_get_geometry(conn, screen->root);
+ if ((geom = xcb_get_geometry_reply(conn, geomc, 0)) == NULL)
+ return;
+
+ if (last_resolution[0] == geom->width &&
+ last_resolution[1] == geom->height) {
+ free(geom);
+ return;
+ }
+
+ last_resolution[0] = geom->width;
+ last_resolution[1] = geom->height;
+
+ free(geom);
+
+ redraw_screen();
+
+ uint32_t mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
+ xcb_configure_window(conn, win, mask, last_resolution);
+ xcb_flush(conn);
+
+ xinerama_query_screens();
+ redraw_screen();
+}
/*
* Callback function for PAM. We only react on password request callbacks.
*
*/
static int conv_callback(int num_msg, const struct pam_message **msg,
- struct pam_response **resp, void *appdata_ptr) {
- if (num_msg == 0)
- return 1;
-
- /* PAM expects an arry of responses, one for each message */
- if ((*resp = calloc(num_msg, sizeof(struct pam_message))) == NULL) {
- perror("calloc");
- return 1;
+ struct pam_response **resp, void *appdata_ptr)
+{
+ if (num_msg == 0)
+ return 1;
+
+ /* PAM expects an array of responses, one for each message */
+ if ((*resp = calloc(num_msg, sizeof(struct pam_response))) == NULL) {
+ perror("calloc");
+ return 1;
+ }
+
+ for (int c = 0; c < num_msg; c++) {
+ if (msg[c]->msg_style != PAM_PROMPT_ECHO_OFF &&
+ msg[c]->msg_style != PAM_PROMPT_ECHO_ON)
+ continue;
+
+ /* return code is currently not used but should be set to zero */
+ resp[c]->resp_retcode = 0;
+ if ((resp[c]->resp = strdup(password)) == NULL) {
+ perror("strdup");
+ return 1;
}
+ }
+
+ return 0;
+}
+
+/*
+ * This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
+ * See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
+ *
+ */
+static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
+ /* empty, because xcb_prepare_cb and xcb_check_cb are used */
+}
- 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;
+/*
+ * 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;
+ }
- /* return code is currently not used but should be set to zero */
- resp[c]->resp_retcode = 0;
- if ((resp[c]->resp = strdup(passwd)) == NULL) {
- perror("strdup");
- return 1;
+ /* 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;
}
- return 0;
+ 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[]) {
- char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
- char buf[32];
- char *username;
- int num, screen;
-
- unsigned int len;
- bool running = true;
-
- /* By default, fork, don’t beep and don’t turn off monitor */
- bool dont_fork = false;
- bool beep = false;
- bool dpms = false;
- bool xpm_image = false;
- bool tiling = false;
- char xpm_image_path[256];
- char color[7] = "ffffff"; // white
- Cursor invisible;
- Display *dpy;
- KeySym ksym;
- Pixmap pmap;
- Window root, w;
- XColor black, dummy;
- XEvent ev;
- XSetWindowAttributes wa;
-
- pam_handle_t *handle;
- struct pam_conv conv = {conv_callback, NULL};
-
- char opt;
- int optind = 0;
- static struct option long_options[] = {
- {"version", no_argument, NULL, 'v'},
- {"nofork", no_argument, NULL, 'n'},
- {"beep", no_argument, NULL, 'b'},
- {"dpms", no_argument, NULL, 'd'},
- {"image", required_argument, NULL, 'i'},
- {"color", required_argument, NULL, 'c'},
- {"tiling", no_argument, NULL, 't'},
- {NULL, no_argument, NULL, 0}
- };
-
- while ((opt = getopt_long(argc, argv, "vnbdi:c:t", long_options, &optind)) != -1) {
- switch (opt) {
- case 'v':
- die("i3lock-"VERSION", © 2009 Michael Stapelberg\n"
- "based on slock, which is © 2006-2008 Anselm R Garbe\n");
- case 'n':
- dont_fork = true;
- break;
- case 'b':
- beep = true;
- break;
- case 'd':
- dpms = true;
- break;
- case 'i':
- strncpy(xpm_image_path, optarg, 255);
- xpm_image = true;
- break;
- 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)
- die("color is invalid, color must be given in 6-byte format: rrggbb\n");
-
- break;
- }
- case 't':
- tiling = true;
- break;
- default:
- die("i3lock: Unknown option. Syntax: i3lock [-v] [-n] [-b] [-d] [-i image.xpm] [-c color] [-t]\n");
- }
+ char *username;
+ char *image_path = NULL;
+ int ret;
+ struct pam_conv conv = {conv_callback, NULL};
+ int curs_choice = CURS_NONE;
+ int o;
+ int optind = 0;
+ struct option longopts[] = {
+ {"version", no_argument, NULL, 'v'},
+ {"nofork", no_argument, NULL, 'n'},
+ {"beep", no_argument, NULL, 'b'},
+ {"dpms", no_argument, NULL, 'd'},
+ {"color", required_argument, NULL, 'c'},
+ {"pointer", required_argument, NULL , 'p'},
+ {"debug", no_argument, NULL, 0},
+ {"help", no_argument, NULL, 'h'},
+ {"no-unlock-indicator", no_argument, NULL, 'u'},
+ {"image", required_argument, NULL, 'i'},
+ {"tiling", no_argument, NULL, 't'},
+ {"ignore-empty-password", no_argument, NULL, 'e'},
+ {"inactivity-timeout", required_argument, NULL, 'I'},
+ {NULL, no_argument, NULL, 0}
+ };
+
+ if ((username = getenv("USER")) == NULL)
+ errx(EXIT_FAILURE, "USER environment variable not set, please set it.\n");
+
+ char *optstring = "hvnbdc:p:ui:teI:";
+ while ((o = getopt_long(argc, argv, optstring, 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 '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;
- if ((username = getenv("USER")) == NULL)
- die("USER environment variable not set, please set it.\n");
+ /* Skip # if present */
+ if (arg[0] == '#')
+ arg++;
- int ret = pam_start("i3lock", username, &conv, &handle);
- if (ret != PAM_SUCCESS)
- die("PAM: %s\n", pam_strerror(handle, ret));
+ 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\n");
- if(!(dpy = XOpenDisplay(0)))
- die("i3lock: cannot open display\n");
- screen = DefaultScreen(dpy);
- root = RootWindow(dpy, screen);
+ 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\".\n");
+ }
+ break;
+ case 'e':
+ ignore_empty_password = true;
+ break;
+ case 0:
+ if (strcmp(longopts[optind].name, "debug") == 0)
+ debug_mode = true;
+ break;
+ default:
+ errx(EXIT_FAILURE, "Syntax: i3lock [-v] [-n] [-b] [-d] [-c color] [-u] [-p win|default]"
+ " [-i image.png] [-t] [-e] [-I]"
+ );
+ }
+ }
- if (!dont_fork) {
- if (fork() != 0)
- return 0;
+ /* We need (relatively) random numbers for highlighting a random part of
+ * the unlock indicator upon keypresses. */
+ srand(time(NULL));
+
+ /* Initialize PAM */
+ ret = pam_start("i3lock", username, &conv, &pam_handle);
+ if (ret != PAM_SUCCESS)
+ errx(EXIT_FAILURE, "PAM: %s", pam_strerror(pam_handle, ret));
+
+/* Using mlock() as non-super-user seems only possible in Linux. Users of other
+ * operating systems should use encrypted swap/no swap (or remove the ifdef and
+ * run i3lock as super-user). */
+#if defined(__linux__)
+ /* Lock the area where we store the password in memory, we don’t want it to
+ * be swapped to disk. Since Linux 2.6.9, this does not require any
+ * privileges, just enough bytes in the RLIMIT_MEMLOCK limit. */
+ if (mlock(password, sizeof(password)) != 0)
+ err(EXIT_FAILURE, "Could not lock page in memory, check RLIMIT_MEMLOCK");
+#endif
+
+ /* 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))) {
+ if (!dpmsr->capable) {
+ if (debug_mode)
+ fprintf(stderr, "Disabling DPMS, X server not DPMS capable\n");
+ dpms = false;
+ }
+ free(dpmsr);
}
+ }
- /* init */
- wa.override_redirect = 1;
- wa.background_pixel = get_colorpixel(color);
- w = XCreateWindow(dpy, root, 0, 0, DisplayWidth(dpy, screen), DisplayHeight(dpy, screen),
- 0, DefaultDepth(dpy, screen), CopyFromParent,
- DefaultVisual(dpy, screen), CWOverrideRedirect | CWBackPixel, &wa);
- XAllocNamedColor(dpy, DefaultColormap(dpy, screen), "black", &black, &dummy);
- pmap = XCreateBitmapFromData(dpy, w, curs, 8, 8);
- invisible = XCreatePixmapCursor(dpy, pmap, pmap, &black, &black, 0, 0);
- XDefineCursor(dpy, w, invisible);
- XMapRaised(dpy, w);
-
- if (xpm_image && file_exists(xpm_image_path)) {
- GC gc = XDefaultGC(dpy, 0);
- int depth = DefaultDepth(dpy, screen);
- int disp_width = DisplayWidth(dpy, screen);
- int disp_height = DisplayHeight(dpy, screen);
- Pixmap pix = XCreatePixmap(dpy, w, disp_width, disp_height, depth);
- XpmImage xpm_image;
- XpmInfo xpm_info;
-
- int err = XpmReadFileToXpmImage(xpm_image_path, &xpm_image, &xpm_info);
- if (err != 0) {
- print_xpm_error(err);
- return 1;
- }
+ screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
- err = XpmCreatePixmapFromXpmImage(dpy, w, &xpm_image, &pix, 0, 0);
- if (err != 0) {
- print_xpm_error(err);
- return 1;
- }
+ last_resolution[0] = screen->width_in_pixels;
+ last_resolution[1] = screen->height_in_pixels;
- if (tiling)
- tiling_image(&xpm_image, disp_height, disp_width, dpy, pix, w, gc);
- else
- XCopyArea(dpy, pix, w, gc, 0, 0, disp_width, disp_height, 0, 0);
- }
+ xcb_change_window_attributes(conn, screen->root, XCB_CW_EVENT_MASK,
+ (uint32_t[]){ XCB_EVENT_MASK_STRUCTURE_NOTIFY });
- for(len = 1000; len; len--) {
- if(XGrabPointer(dpy, root, False, ButtonPressMask | ButtonReleaseMask,
- GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess)
- break;
- usleep(1000);
+ 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;
}
- 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 (len == 0 && dpms && DPMSCapable(dpy)) {
- DPMSEnable(dpy);
- DPMSForceLevel(dpy, DPMSModeOff);
- }
+ }
- if(ev.type != KeyPress)
- continue;
+ /* 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);
+ }
- buf[0] = 0;
- num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0);
- if(IsKeypadKey(ksym)) {
- if(ksym == XK_KP_Enter)
- ksym = XK_Return;
- else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
- ksym = (ksym - XK_KP_0) + XK_0;
- }
- if(IsFunctionKey(ksym) ||
- IsKeypadKey(ksym) ||
- IsMiscFunctionKey(ksym) ||
- IsPFKey(ksym) ||
- IsPrivateKeypadKey(ksym))
- continue;
- switch(ksym) {
- case XK_Return:
- passwd[len] = 0;
- if ((ret = pam_authenticate(handle, 0)) == PAM_SUCCESS)
- running = false;
- else {
- fprintf(stderr, "PAM: %s\n", pam_strerror(handle, ret));
- if (beep)
- XBell(dpy, 100);
- }
- len = 0;
- break;
- case XK_Escape:
- len = 0;
- break;
- case XK_BackSpace:
- if (len > 0)
- len--;
- break;
- default:
- if(num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) {
- memcpy(passwd + len, buf, num);
- len += num;
- }
- break;
- }
- }
- XUngrabPointer(dpy, CurrentTime);
- XFreePixmap(dpy, pmap);
- XDestroyWindow(dpy, w);
- XCloseDisplay(dpy);
- return 0;
+ cursor = create_cursor(conn, screen, win, curs_choice);
+
+ 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();
+
+ turn_monitors_off();
+
+ /* 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