1 /* See LICENSE file for license details. */
2 #define _XOPEN_SOURCE 500
15 #include <sys/types.h>
16 #include <X11/extensions/Xrandr.h>
17 #include <X11/keysym.h>
19 #include <X11/Xutil.h>
22 #include <login_cap.h>
39 unsigned long colors[NUMCOLS];
44 static Bool running = True;
50 die(const char *errstr, ...)
55 vfprintf(stderr, errstr, ap);
68 fd = open("/proc/self/oom_score_adj", O_WRONLY);
69 if (fd < 0 && errno == ENOENT)
71 if (fd < 0 || write(fd, "-1000\n", 6) != 6 || close(fd) != 0)
72 die("cannot disable the out-of-memory killer for this process\n");
77 /* only run as root */
85 pw = getpwuid(getuid());
88 die("slock: getpwuid: %s\n", strerror(errno));
90 die("slock: cannot retrieve password entry\n");
95 if (rval[0] == 'x' && rval[1] == '\0') {
97 sp = getspnam(getenv("USER"));
99 die("slock: cannot retrieve shadow entry (make sure to suid or sgid slock)\n");
104 /* drop privileges */
105 if (geteuid() == 0 &&
106 ((getegid() != pw->pw_gid && setgid(pw->pw_gid) < 0) || setuid(pw->pw_uid) < 0))
107 die("slock: cannot drop privileges\n");
116 readpw(Display *dpy, const char *pws)
119 char buf[32], passwd[256];
121 unsigned int len, llen;
128 /* As "slock" stands for "Simple X display locker", the DPMS settings
129 * had been removed and you can set it with "xset" or some other
130 * utility. This way the user can easily set a customized DPMS
132 while (running && !XNextEvent(dpy, &ev)) {
133 if (ev.type == KeyPress) {
135 num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0);
136 if (IsKeypadKey(ksym)) {
137 if (ksym == XK_KP_Enter)
139 else if (ksym >= XK_KP_0 && ksym <= XK_KP_9)
140 ksym = (ksym - XK_KP_0) + XK_0;
142 if (IsFunctionKey(ksym) ||
144 IsMiscFunctionKey(ksym) ||
146 IsPrivateKeypadKey(ksym))
152 running = !auth_userokay(getlogin(), NULL, "auth-xlock", passwd);
154 running = !!strcmp(crypt(passwd, pws), pws);
168 if (num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) {
169 memcpy(passwd + len, buf, num);
174 if (llen == 0 && len != 0) {
175 for (screen = 0; screen < nscreens; screen++) {
176 XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[INPUT]);
177 XClearWindow(dpy, locks[screen]->win);
179 } else if (llen != 0 && len == 0) {
180 for (screen = 0; screen < nscreens; screen++) {
181 XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[EMPTY]);
182 XClearWindow(dpy, locks[screen]->win);
186 } else if (rr && ev.type == rrevbase + RRScreenChangeNotify) {
187 XRRScreenChangeNotifyEvent *rre = (XRRScreenChangeNotifyEvent*)&ev;
188 for (screen = 0; screen < nscreens; screen++) {
189 if (locks[screen]->win == rre->window) {
190 XResizeWindow(dpy, locks[screen]->win, rre->width, rre->height);
191 XClearWindow(dpy, locks[screen]->win);
194 } else for (screen = 0; screen < nscreens; screen++)
195 XRaiseWindow(dpy, locks[screen]->win);
200 unlockscreen(Display *dpy, Lock *lock)
202 if(dpy == NULL || lock == NULL)
205 XUngrabPointer(dpy, CurrentTime);
206 XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, NUMCOLS, 0);
207 XFreePixmap(dpy, lock->pmap);
208 XDestroyWindow(dpy, lock->win);
214 lockscreen(Display *dpy, int screen)
216 char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
221 XSetWindowAttributes wa;
224 if (dpy == NULL || screen < 0)
227 lock = malloc(sizeof(Lock));
231 lock->screen = screen;
233 lock->root = RootWindow(dpy, lock->screen);
235 for (i = 0; i < NUMCOLS; i++) {
236 XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), colorname[i], &color, &dummy);
237 lock->colors[i] = color.pixel;
241 wa.override_redirect = 1;
242 wa.background_pixel = lock->colors[INIT];
243 lock->win = XCreateWindow(dpy, lock->root, 0, 0, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen),
244 0, DefaultDepth(dpy, lock->screen), CopyFromParent,
245 DefaultVisual(dpy, lock->screen), CWOverrideRedirect | CWBackPixel, &wa);
246 lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8);
247 invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &color, &color, 0, 0);
248 XDefineCursor(dpy, lock->win, invisible);
249 XMapRaised(dpy, lock->win);
251 XRRSelectInput(dpy, lock->win, RRScreenChangeNotifyMask);
252 for (len = 1000; len; len--) {
253 if (XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
254 GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess)
258 if (running && (len > 0)) {
259 for (len = 1000; len; len--) {
260 if (XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)
266 running &= (len > 0);
268 unlockscreen(dpy, lock);
272 XSelectInput(dpy, lock->root, SubstructureNotifyMask);
281 fprintf(stderr, "usage: slock [-v]\n");
286 main(int argc, char **argv) {
287 #ifndef HAVE_BSD_AUTH
293 if ((argc == 2) && !strcmp("-v", argv[1]))
294 die("slock-%s, © 2006-2015 slock engineers\n", VERSION);
302 if (!getpwuid(getuid()))
303 die("slock: no passwd entry for you\n");
305 #ifndef HAVE_BSD_AUTH
309 if (!(dpy = XOpenDisplay(0)))
310 die("slock: cannot open display\n");
311 rr = XRRQueryExtension(dpy, &rrevbase, &rrerrbase);
312 /* Get the number of screens in display "dpy" and blank them all. */
313 nscreens = ScreenCount(dpy);
314 locks = malloc(sizeof(Lock *) * nscreens);
316 die("slock: malloc: %s\n", strerror(errno));
318 for (screen = 0; screen < nscreens; screen++) {
319 if ( (locks[screen] = lockscreen(dpy, screen)) != NULL)
324 /* Did we actually manage to lock something? */
325 if (nlocks == 0) { /* nothing to protect */
331 /* Everything is now blank. Now wait for the correct password. */
338 /* Password ok, unlock everything and quit. */
339 for (screen = 0; screen < nscreens; screen++)
340 unlockscreen(dpy, locks[screen]);