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);
54 fd = open("/proc/self/oom_score_adj", O_WRONLY);
55 if (fd < 0 && errno == ENOENT)
57 if (fd < 0 || write(fd, "-1000\n", 6) != 6 || close(fd) != 0)
58 die("cannot disable the out-of-memory killer for this process\n");
64 getpw(void) { /* only run as root */
69 pw = getpwuid(getuid());
71 die("slock: getpwuid: %s\n", strerror(errno));
73 die("slock: cannot retrieve password entry (make sure to suid or sgid slock)\n");
78 if (strlen(rval) >= 1) { /* kludge, assumes pw placeholder entry has len >= 1 */
80 sp = getspnam(getenv("USER"));
82 die("slock: cannot retrieve shadow entry (make sure to suid or sgid slock)\n");
90 && ((getegid() != pw->pw_gid && setgid(pw->pw_gid) < 0) || setuid(pw->pw_uid) < 0))
91 die("slock: cannot drop privileges\n");
100 readpw(Display *dpy, const char *pws)
103 char buf[32], passwd[256];
105 unsigned int len, llen;
112 /* As "slock" stands for "Simple X display locker", the DPMS settings
113 * had been removed and you can set it with "xset" or some other
114 * utility. This way the user can easily set a customized DPMS
116 while(running && !XNextEvent(dpy, &ev)) {
117 if(ev.type == KeyPress) {
119 num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0);
120 if(IsKeypadKey(ksym)) {
121 if(ksym == XK_KP_Enter)
123 else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
124 ksym = (ksym - XK_KP_0) + XK_0;
126 if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
127 || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
128 || IsPrivateKeypadKey(ksym))
134 running = !auth_userokay(getlogin(), NULL, "auth-xlock", passwd);
136 running = !!strcmp(crypt(passwd, pws), pws);
150 if(num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) {
151 memcpy(passwd + len, buf, num);
156 if(llen == 0 && len != 0) {
157 for(screen = 0; screen < nscreens; screen++) {
158 XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[1]);
159 XClearWindow(dpy, locks[screen]->win);
161 } else if(llen != 0 && len == 0) {
162 for(screen = 0; screen < nscreens; screen++) {
163 XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[0]);
164 XClearWindow(dpy, locks[screen]->win);
169 else for(screen = 0; screen < nscreens; screen++)
170 XRaiseWindow(dpy, locks[screen]->win);
175 unlockscreen(Display *dpy, Lock *lock) {
176 if(dpy == NULL || lock == NULL)
179 XUngrabPointer(dpy, CurrentTime);
180 XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, 2, 0);
181 XFreePixmap(dpy, lock->pmap);
182 XDestroyWindow(dpy, lock->win);
188 lockscreen(Display *dpy, int screen) {
189 char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
193 XSetWindowAttributes wa;
196 if(dpy == NULL || screen < 0)
199 lock = malloc(sizeof(Lock));
203 lock->screen = screen;
205 lock->root = RootWindow(dpy, lock->screen);
208 wa.override_redirect = 1;
209 wa.background_pixel = BlackPixel(dpy, lock->screen);
210 lock->win = XCreateWindow(dpy, lock->root, 0, 0, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen),
211 0, DefaultDepth(dpy, lock->screen), CopyFromParent,
212 DefaultVisual(dpy, lock->screen), CWOverrideRedirect | CWBackPixel, &wa);
213 XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR2, &color, &dummy);
214 lock->colors[1] = color.pixel;
215 XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR1, &color, &dummy);
216 lock->colors[0] = color.pixel;
217 lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8);
218 invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &color, &color, 0, 0);
219 XDefineCursor(dpy, lock->win, invisible);
220 XMapRaised(dpy, lock->win);
221 for(len = 1000; len; len--) {
222 if(XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
223 GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess)
227 if(running && (len > 0)) {
228 for(len = 1000; len; len--) {
229 if(XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
236 running &= (len > 0);
238 unlockscreen(dpy, lock);
242 XSelectInput(dpy, lock->root, SubstructureNotifyMask);
249 fprintf(stderr, "usage: slock [-v]\n");
254 main(int argc, char **argv) {
255 #ifndef HAVE_BSD_AUTH
261 if((argc == 2) && !strcmp("-v", argv[1]))
262 die("slock-%s, © 2006-2012 Anselm R Garbe\n", VERSION);
270 if(!getpwuid(getuid()))
271 die("slock: no passwd entry for you\n");
273 #ifndef HAVE_BSD_AUTH
277 if(!(dpy = XOpenDisplay(0)))
278 die("slock: cannot open display\n");
279 /* Get the number of screens in display "dpy" and blank them all. */
280 nscreens = ScreenCount(dpy);
281 locks = malloc(sizeof(Lock *) * nscreens);
283 die("slock: malloc: %s\n", strerror(errno));
285 for(screen = 0; screen < nscreens; screen++) {
286 if ( (locks[screen] = lockscreen(dpy, screen)) != NULL)
291 /* Did we actually manage to lock something? */
292 if (nlocks == 0) { // nothing to protect
298 /* Everything is now blank. Now wait for the correct password. */
305 /* Password ok, unlock everything and quit. */
306 for(screen = 0; screen < nscreens; screen++)
307 unlockscreen(dpy, locks[screen]);