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 getpw(void) { /* only run as root */
53 pw = getpwuid(getuid());
55 die("cannot retrieve password entry (make sure to suid or sgid slock)");
62 sp = getspnam(getenv("USER"));
64 die("slock: cannot retrieve shadow entry (make sure to suid or sgid slock)\n");
71 if(setgid(pw->pw_gid) < 0 || setuid(pw->pw_uid) < 0)
72 die("cannot drop privileges");
81 readpw(Display *dpy, const char *pws)
84 char buf[32], passwd[256];
95 /* As "slock" stands for "Simple X display locker", the DPMS settings
96 * had been removed and you can set it with "xset" or some other
97 * utility. This way the user can easily set a customized DPMS
100 while(running && !XNextEvent(dpy, &ev)) {
101 if(ev.type == KeyPress) {
103 num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0);
104 if(IsKeypadKey(ksym)) {
105 if(ksym == XK_KP_Enter)
107 else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
108 ksym = (ksym - XK_KP_0) + XK_0;
110 if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
111 || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
112 || IsPrivateKeypadKey(ksym))
118 running = !auth_userokay(getlogin(), NULL, "auth-xlock", passwd);
120 running = strcmp(crypt(passwd, pws), pws);
134 if(num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) {
135 memcpy(passwd + len, buf, num);
145 unlockscreen(Display *dpy, struct st_lock *lock) {
146 if (dpy == NULL || lock == NULL)
149 XUngrabPointer(dpy, CurrentTime);
150 XFreePixmap(dpy, lock->pmap);
151 XDestroyWindow(dpy, lock->w);
156 static struct st_lock *
157 lockscreen(Display *dpy, int screen) {
158 char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
160 struct st_lock *lock;
163 XSetWindowAttributes wa;
166 if (dpy == NULL || screen < 0)
169 lock = malloc(sizeof(struct st_lock));
173 lock->screen = screen;
175 lock->root = RootWindow(dpy, lock->screen);
178 wa.override_redirect = 1;
179 wa.background_pixel = BlackPixel(dpy, lock->screen);
180 lock->w = XCreateWindow(dpy, lock->root, 0, 0, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen),
181 0, DefaultDepth(dpy, lock->screen), CopyFromParent,
182 DefaultVisual(dpy, lock->screen), CWOverrideRedirect | CWBackPixel, &wa);
183 XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), "black", &black, &dummy);
184 lock->pmap = XCreateBitmapFromData(dpy, lock->w, curs, 8, 8);
185 invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &black, &black, 0, 0);
186 XDefineCursor(dpy, lock->w, invisible);
187 XMapRaised(dpy, lock->w);
188 for(len = 1000; len; len--) {
189 if(XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
190 GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess)
194 if((running = running && (len > 0))) {
195 for(len = 1000; len; len--) {
196 if(XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
205 unlockscreen(dpy, lock);
214 fprintf(stderr, "usage: %s -v", __progname);
219 xerrordummy(Display *dpy, XErrorEvent *ee) {
224 main(int argc, char **argv) {
225 #ifndef HAVE_BSD_AUTH
229 int nscreens, screen;
231 struct st_lock **locks;
233 if((argc == 2) && !strcmp("-v", argv[1]))
234 die("slock-%s, © 2006-2012 Anselm R Garbe", VERSION);
238 if(!getpwuid(getuid()))
239 die("no passwd entry for you");
241 #ifndef HAVE_BSD_AUTH
245 if(!(dpy = XOpenDisplay(0)))
246 die("cannot open display");
247 /* prevent default error handler to take over */
248 XSetErrorHandler(xerrordummy);
249 /* Get the number of screens in display "dpy" and blank them all. */
250 nscreens = ScreenCount(dpy);
251 locks = malloc(sizeof(struct st_lock *) * nscreens);
253 die("malloc: %s", strerror(errno));
255 for (screen = 0; screen < nscreens; screen++)
256 locks[screen] = lockscreen(dpy, screen);
260 /* Everything is now blank. Now wait for the correct password. */
267 /* Password ok, unlock everything and quit. */
268 for (screen = 0; screen < nscreens; screen++)
269 unlockscreen(dpy, locks[screen]);