-/* 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 Michael Stapelberg
+ *
+ * See LICENSE for licensing information
+ *
+ */
#include <stdio.h>
+#include <stdlib.h>
#include <string.h>
#include <unistd.h>
-#include <sys/types.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <xcb/xcb.h>
+#include <xcb/dpms.h>
+#include <xcb/xcb_image.h>
+#include <xcb/xcb_keysyms.h>
+#include <err.h>
+#include <cairo.h>
+#include <assert.h>
+#include <security/pam_appl.h>
+/* FIXME: can we get rid of this header? */
#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
-
-static void
-die(const char *errstr, ...) {
- va_list ap;
-
- va_start(ap, errstr);
- vfprintf(stderr, errstr, ap);
- va_end(ap);
- exit(EXIT_FAILURE);
+#include <getopt.h>
+#include <string.h>
+
+#include "keysym2ucs.h"
+#include "ucs2_to_utf8.h"
+#include "xcb.h"
+
+static xcb_connection_t *conn;
+static xcb_key_symbols_t *symbols;
+static cairo_t *ctx = NULL;
+static pam_handle_t *pam_handle;
+static 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;
+
+static void input_done() {
+ if (input_position == 0)
+ return;
+
+ /* TODO: change cursor during authentication? */
+ if (pam_authenticate(pam_handle, 0) == PAM_SUCCESS) {
+ printf("successfully authenticated\n");
+ exit(0);
+ }
+
+ /* beep on authentication failure, if enabled */
+ if (beep) {
+ xcb_bell(conn, 100);
+ xcb_flush(conn);
+ }
}
-#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
-
- /* drop privileges */
- if(setgid(pw->pw_gid) < 0 || setuid(pw->pw_uid) < 0)
- die("slock: cannot drop privileges\n");
- return rval;
+/*
+ * 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);
+
+ /* fix state */
+ event->state &= ~numlockmask;
+
+ 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;
+ }
}
-#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;
-
-#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();
-#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);
-#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;
+
+/*
+ * 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) {
+ 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))
+ return;
+
+ 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;
+
+ case XK_Return:
+ input_done();
+ case XK_Escape:
+ input_position = 0;
+ password[input_position] = '\0';
+ return;
+
+ case XK_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);
+ return;
+ }
+
+ /* 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));
+
+ 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};
+
+ /* 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);
+}
+
+/*
+ * 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;
+ }
+
+ 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;
+}
+
+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;
+ char 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'},
+ {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, "vnbdi:c:tp:", longopts, &optind)) != -1) {
+ switch (o) {
+ case 'v':
+ errx(EXIT_SUCCESS, "i3lock © 2010 Michael Stapelberg\n");
+ case 'n':
+ dont_fork = true;
+ break;
+ case 'b':
+ beep = true;
+ break;
+ case 'd':
+ dpms = true;
+ break;
+ case 'i':
+ image_path = strdup(optarg);
+ 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, color must be given in 6-byte format: rrggbb\n");
+
+ break;
+ }
+ case 't':
+ /* TODO: tile image */
+ break;
+ case 'p':
+ /* TODO: cursor */
+ break;
+ default:
+ errx(1, "i3lock: Unknown option. Syntax: i3lock [-v] [-n] [-b] [-d] [-i image.png] [-c color] [-t] [-p win|default]\n");
+ }
+ }
+
+ /* 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()");
+
+ if (!dont_fork) {
+ /* In the parent process, we exit */
+ if (fork() != 0)
+ return 0;
+ }
+
+ /* 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;
+ }
+ }
+
+ scr = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
+ vistype = get_root_visual_type(scr);
+
+ /* 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);
+
+ grab_pointer_and_keyboard(conn, scr);
+
+ if (image_path)
+ img = cairo_image_surface_create_from_png(image_path);
+
+ 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();
+ }
+
+ if (dpms)
+ dpms_turn_off_screen(conn);
+
+ while ((event = xcb_wait_for_event(conn))) {
+ int type = x_event_type(event);
+
+ 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);
+
+ /* 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);
+
+ continue;
+ }
+
+ printf("WARNING: unhandled event of type %d\n", type);
+ }
+
+ return 0;
}
projects / i3 / i3lock / blobdiff