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>
38 unsigned long colors[NUMCOLS];
43 static Bool running = True;
46 die(const char *errstr, ...)
51 vfprintf(stderr, errstr, ap);
64 fd = open("/proc/self/oom_score_adj", O_WRONLY);
65 if (fd < 0 && errno == ENOENT)
67 if (fd < 0 || write(fd, "-1000\n", 6) != 6 || close(fd) != 0)
68 die("cannot disable the out-of-memory killer for this process\n");
73 /* only run as root */
81 pw = getpwuid(getuid());
84 die("slock: getpwuid: %s\n", strerror(errno));
86 die("slock: cannot retrieve password entry\n");
91 if (rval[0] == 'x' && rval[1] == '\0') {
93 sp = getspnam(getenv("USER"));
95 die("slock: cannot retrieve shadow entry (make sure to suid or sgid slock)\n");
100 /* drop privileges */
101 if (geteuid() == 0 &&
102 ((getegid() != pw->pw_gid && setgid(pw->pw_gid) < 0) || setuid(pw->pw_uid) < 0))
103 die("slock: cannot drop privileges\n");
112 readpw(Display *dpy, const char *pws)
115 char buf[32], passwd[256];
117 unsigned int len, llen;
124 /* As "slock" stands for "Simple X display locker", the DPMS settings
125 * had been removed and you can set it with "xset" or some other
126 * utility. This way the user can easily set a customized DPMS
128 while (running && !XNextEvent(dpy, &ev)) {
129 if (ev.type == KeyPress) {
131 num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0);
132 if (IsKeypadKey(ksym)) {
133 if (ksym == XK_KP_Enter)
135 else if (ksym >= XK_KP_0 && ksym <= XK_KP_9)
136 ksym = (ksym - XK_KP_0) + XK_0;
138 if (IsFunctionKey(ksym) ||
140 IsMiscFunctionKey(ksym) ||
142 IsPrivateKeypadKey(ksym))
148 running = !auth_userokay(getlogin(), NULL, "auth-xlock", passwd);
150 running = !!strcmp(crypt(passwd, pws), pws);
164 if (num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) {
165 memcpy(passwd + len, buf, num);
170 if (llen == 0 && len != 0) {
171 for (screen = 0; screen < nscreens; screen++) {
172 XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[INPUT]);
173 XClearWindow(dpy, locks[screen]->win);
175 } else if (llen != 0 && len == 0) {
176 for (screen = 0; screen < nscreens; screen++) {
177 XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[EMPTY]);
178 XClearWindow(dpy, locks[screen]->win);
183 else for (screen = 0; screen < nscreens; screen++)
184 XRaiseWindow(dpy, locks[screen]->win);
189 unlockscreen(Display *dpy, Lock *lock)
191 if(dpy == NULL || lock == NULL)
194 XUngrabPointer(dpy, CurrentTime);
195 XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, NUMCOLS, 0);
196 XFreePixmap(dpy, lock->pmap);
197 XDestroyWindow(dpy, lock->win);
203 lockscreen(Display *dpy, int screen)
205 char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
210 XSetWindowAttributes wa;
213 if (dpy == NULL || screen < 0)
216 lock = malloc(sizeof(Lock));
220 lock->screen = screen;
222 lock->root = RootWindow(dpy, lock->screen);
224 for (i = 0; i < NUMCOLS; i++) {
225 XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), colorname[i], &color, &dummy);
226 lock->colors[i] = color.pixel;
230 wa.override_redirect = 1;
231 wa.background_pixel = lock->colors[INIT];
232 lock->win = XCreateWindow(dpy, lock->root, 0, 0, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen),
233 0, DefaultDepth(dpy, lock->screen), CopyFromParent,
234 DefaultVisual(dpy, lock->screen), CWOverrideRedirect | CWBackPixel, &wa);
235 lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8);
236 invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &color, &color, 0, 0);
237 XDefineCursor(dpy, lock->win, invisible);
238 XMapRaised(dpy, lock->win);
239 for (len = 1000; len; len--) {
240 if (XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
241 GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess)
245 if (running && (len > 0)) {
246 for (len = 1000; len; len--) {
247 if (XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)
253 running &= (len > 0);
255 unlockscreen(dpy, lock);
259 XSelectInput(dpy, lock->root, SubstructureNotifyMask);
268 fprintf(stderr, "usage: slock [-v]\n");
273 main(int argc, char **argv) {
274 #ifndef HAVE_BSD_AUTH
280 if ((argc == 2) && !strcmp("-v", argv[1]))
281 die("slock-%s, © 2006-2015 slock engineers\n", VERSION);
289 if (!getpwuid(getuid()))
290 die("slock: no passwd entry for you\n");
292 #ifndef HAVE_BSD_AUTH
296 if (!(dpy = XOpenDisplay(0)))
297 die("slock: cannot open display\n");
298 /* Get the number of screens in display "dpy" and blank them all. */
299 nscreens = ScreenCount(dpy);
300 locks = malloc(sizeof(Lock *) * nscreens);
302 die("slock: malloc: %s\n", strerror(errno));
304 for (screen = 0; screen < nscreens; screen++) {
305 if ( (locks[screen] = lockscreen(dpy, screen)) != NULL)
310 /* Did we actually manage to lock something? */
311 if (nlocks == 0) { /* nothing to protect */
317 /* Everything is now blank. Now wait for the correct password. */
324 /* Password ok, unlock everything and quit. */
325 for (screen = 0; screen < nscreens; screen++)
326 unlockscreen(dpy, locks[screen]);