2 /* See LICENSE file for license details. */
3 #define _XOPEN_SOURCE 500
16 #include <sys/types.h>
17 #include <X11/keysym.h>
19 #include <X11/Xutil.h>
22 #include <login_cap.h>
30 unsigned long colors[2];
35 static Bool running = True;
38 die(const char *errstr, ...) {
42 vfprintf(stderr, errstr, ap);
49 getpw(void) { /* only run as root */
53 pw = getpwuid(getuid());
55 die("slock: cannot retrieve password entry (make sure to suid or sgid slock)");
60 if (strlen(rval) >= 1) { /* kludge, assumes pw placeholder entry has len >= 1 */
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("slock: cannot drop privileges");
81 readpw(Display *dpy, const char *pws)
84 char buf[32], passwd[256];
86 unsigned int len, llen;
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
97 while(running && !XNextEvent(dpy, &ev)) {
98 if(ev.type == KeyPress) {
100 num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0);
101 if(IsKeypadKey(ksym)) {
102 if(ksym == XK_KP_Enter)
104 else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
105 ksym = (ksym - XK_KP_0) + XK_0;
107 if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
108 || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
109 || IsPrivateKeypadKey(ksym))
115 running = !auth_userokay(getlogin(), NULL, "auth-xlock", passwd);
117 running = strcmp(crypt(passwd, pws), pws);
131 if(num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) {
132 memcpy(passwd + len, buf, num);
137 if(llen == 0 && len != 0) {
138 for(screen = 0; screen < nscreens; screen++) {
139 XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[1]);
140 XClearWindow(dpy, locks[screen]->win);
142 } else if(llen != 0 && len == 0) {
143 for(screen = 0; screen < nscreens; screen++) {
144 XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[0]);
145 XClearWindow(dpy, locks[screen]->win);
150 else for(screen = 0; screen < nscreens; screen++)
151 XRaiseWindow(dpy, locks[screen]->win);
156 unlockscreen(Display *dpy, Lock *lock) {
157 if(dpy == NULL || lock == NULL)
160 XUngrabPointer(dpy, CurrentTime);
161 XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, 2, 0);
162 XFreePixmap(dpy, lock->pmap);
163 XDestroyWindow(dpy, lock->win);
169 lockscreen(Display *dpy, int screen) {
170 char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
174 XSetWindowAttributes wa;
177 if(dpy == NULL || screen < 0)
180 lock = malloc(sizeof(Lock));
184 lock->screen = screen;
186 lock->root = RootWindow(dpy, lock->screen);
189 wa.override_redirect = 1;
190 wa.background_pixel = BlackPixel(dpy, lock->screen);
191 lock->win = XCreateWindow(dpy, lock->root, 0, 0, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen),
192 0, DefaultDepth(dpy, lock->screen), CopyFromParent,
193 DefaultVisual(dpy, lock->screen), CWOverrideRedirect | CWBackPixel, &wa);
194 XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR2, &color, &dummy);
195 lock->colors[1] = color.pixel;
196 XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR1, &color, &dummy);
197 lock->colors[0] = color.pixel;
198 lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8);
199 invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &color, &color, 0, 0);
200 XDefineCursor(dpy, lock->win, invisible);
201 XMapRaised(dpy, lock->win);
202 for(len = 1000; len; len--) {
203 if(XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
204 GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess)
208 if(running && (len > 0)) {
209 for(len = 1000; len; len--) {
210 if(XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
217 running &= (len > 0);
219 unlockscreen(dpy, lock);
223 XSelectInput(dpy, lock->root, SubstructureNotifyMask);
230 fprintf(stderr, "usage: slock [-v]\n");
235 main(int argc, char **argv) {
236 #ifndef HAVE_BSD_AUTH
242 if((argc == 2) && !strcmp("-v", argv[1]))
243 die("slock-%s, © 2006-2012 Anselm R Garbe\n", VERSION);
247 if(!getpwuid(getuid()))
248 die("slock: no passwd entry for you");
250 #ifndef HAVE_BSD_AUTH
254 if(!(dpy = XOpenDisplay(0)))
255 die("slock: cannot open display");
256 /* Get the number of screens in display "dpy" and blank them all. */
257 nscreens = ScreenCount(dpy);
258 locks = malloc(sizeof(Lock *) * nscreens);
260 die("slock: malloc: %s", strerror(errno));
262 for(screen = 0; screen < nscreens; screen++) {
263 if ( (locks[screen] = lockscreen(dpy, screen)) != NULL)
268 /* Did we actually manage to lock something? */
269 if (nlocks == 0) { // nothing to protect
275 /* Everything is now blank. Now wait for the correct password. */
282 /* Password ok, unlock everything and quit. */
283 for(screen = 0; screen < nscreens; screen++)
284 unlockscreen(dpy, locks[screen]);