1 /* See LICENSE file for license details. */
2 #define _XOPEN_SOURCE 500
15 #include <sys/types.h>
16 #include <X11/keysym.h>
18 #include <X11/Xutil.h>
21 #include <login_cap.h>
31 extern const char *__progname;
34 die(const char *errstr, ...) {
37 fprintf(stderr, "%s: ", __progname);
39 vfprintf(stderr, errstr, ap);
41 fprintf(stderr, "\n");
49 get_password(void) { /* only run as root */
54 die("cannot retrieve password entry (make sure to suid slock)");
55 pw = getpwuid(getuid());
62 sp = getspnam(getenv("USER"));
69 if(setgid(pw->pw_gid) < 0 || setuid(pw->pw_uid) < 0)
70 die("cannot drop privileges");
77 read_password(Display *dpy)
79 read_password(Display *dpy, const char *pws)
82 char buf[32], passwd[256];
93 /* As "slock" stands for "Simple X display locker", the DPMS settings
94 * had been removed and you can set it with "xset" or some other
95 * utility. This way the user can easily set a customized DPMS
98 while(running && !XNextEvent(dpy, &ev)) {
99 if(ev.type == KeyPress) {
101 num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0);
102 if(IsKeypadKey(ksym)) {
103 if(ksym == XK_KP_Enter)
105 else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
106 ksym = (ksym - XK_KP_0) + XK_0;
108 if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
109 || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
110 || IsPrivateKeypadKey(ksym))
116 running = !auth_userokay(getlogin(), NULL, "auth-xlock", passwd);
118 running = strcmp(crypt(passwd, pws), pws);
132 if(num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) {
133 memcpy(passwd + len, buf, num);
143 unlockscreen(Display *dpy, struct st_lock *lock) {
144 if (dpy == NULL || lock == NULL)
147 XUngrabPointer(dpy, CurrentTime);
148 XFreePixmap(dpy, lock->pmap);
149 XDestroyWindow(dpy, lock->w);
154 static struct st_lock *
155 lockscreen(Display *dpy, int screen) {
156 char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
158 struct st_lock *lock;
161 XSetWindowAttributes wa;
164 if (dpy == NULL || screen < 0)
167 lock = malloc(sizeof(struct st_lock));
171 lock->screen = screen;
173 lock->root = RootWindow(dpy, lock->screen);
176 wa.override_redirect = 1;
177 wa.background_pixel = BlackPixel(dpy, lock->screen);
178 lock->w = XCreateWindow(dpy, lock->root, 0, 0, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen),
179 0, DefaultDepth(dpy, lock->screen), CopyFromParent,
180 DefaultVisual(dpy, lock->screen), CWOverrideRedirect | CWBackPixel, &wa);
181 XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), "black", &black, &dummy);
182 lock->pmap = XCreateBitmapFromData(dpy, lock->w, curs, 8, 8);
183 invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &black, &black, 0, 0);
184 XDefineCursor(dpy, lock->w, invisible);
185 XMapRaised(dpy, lock->w);
186 for(len = 1000; len; len--) {
187 if(XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
188 GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess)
192 if((running = running && (len > 0))) {
193 for(len = 1000; len; len--) {
194 if(XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
203 unlockscreen(dpy, lock);
212 fprintf(stderr, "usage: %s -v", __progname);
217 main(int argc, char **argv) {
218 #ifndef HAVE_BSD_AUTH
222 int nscreens, screen;
224 struct st_lock **locks;
226 if((argc == 2) && !strcmp("-v", argv[1]))
227 die("slock-%s, © 2006-2008 Anselm R Garbe", VERSION);
231 #ifndef HAVE_BSD_AUTH
232 pws = get_password();
235 if(!(dpy = XOpenDisplay(0)))
236 die("cannot open display");
238 /* Get the number of screens in display "dpy" and blank them all. */
239 nscreens = ScreenCount(dpy);
240 locks = malloc(sizeof(struct st_lock *) * nscreens);
242 die("malloc: %s", strerror(errno));
244 for (screen = 0; screen < nscreens; screen++)
245 locks[screen] = lockscreen(dpy, screen);
249 /* Everything is now blank. Now wait for the correct password. */
253 read_password(dpy, pws);
256 /* Password ok, unlock everything and quit. */
257 for (screen = 0; screen < nscreens; screen++)
258 unlockscreen(dpy, locks[screen]);