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 unsigned long colors[2];
36 static Bool running = True;
39 die(const char *errstr, ...)
44 vfprintf(stderr, errstr, ap);
57 fd = open("/proc/self/oom_score_adj", O_WRONLY);
58 if (fd < 0 && errno == ENOENT)
60 if (fd < 0 || write(fd, "-1000\n", 6) != 6 || close(fd) != 0)
61 die("cannot disable the out-of-memory killer for this process\n");
66 /* only run as root */
74 pw = getpwuid(getuid());
77 die("slock: getpwuid: %s\n", strerror(errno));
79 die("slock: cannot retrieve password entry\n");
84 if (rval[0] == 'x' && rval[1] == '\0') {
86 sp = getspnam(getenv("USER"));
88 die("slock: cannot retrieve shadow entry (make sure to suid or sgid slock)\n");
95 ((getegid() != pw->pw_gid && setgid(pw->pw_gid) < 0) || setuid(pw->pw_uid) < 0))
96 die("slock: cannot drop privileges\n");
105 readpw(Display *dpy, const char *pws)
108 char buf[32], passwd[256];
110 unsigned int len, llen;
117 /* As "slock" stands for "Simple X display locker", the DPMS settings
118 * had been removed and you can set it with "xset" or some other
119 * utility. This way the user can easily set a customized DPMS
121 while (running && !XNextEvent(dpy, &ev)) {
122 if (ev.type == KeyPress) {
124 num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0);
125 if (IsKeypadKey(ksym)) {
126 if (ksym == XK_KP_Enter)
128 else if (ksym >= XK_KP_0 && ksym <= XK_KP_9)
129 ksym = (ksym - XK_KP_0) + XK_0;
131 if (IsFunctionKey(ksym) ||
133 IsMiscFunctionKey(ksym) ||
135 IsPrivateKeypadKey(ksym))
141 running = !auth_userokay(getlogin(), NULL, "auth-xlock", passwd);
143 running = !!strcmp(crypt(passwd, pws), pws);
157 if (num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) {
158 memcpy(passwd + len, buf, num);
163 if (llen == 0 && len != 0) {
164 for (screen = 0; screen < nscreens; screen++) {
165 XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[1]);
166 XClearWindow(dpy, locks[screen]->win);
168 } else if (llen != 0 && len == 0) {
169 for (screen = 0; screen < nscreens; screen++) {
170 XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[0]);
171 XClearWindow(dpy, locks[screen]->win);
176 else for (screen = 0; screen < nscreens; screen++)
177 XRaiseWindow(dpy, locks[screen]->win);
182 unlockscreen(Display *dpy, Lock *lock)
184 if(dpy == NULL || lock == NULL)
187 XUngrabPointer(dpy, CurrentTime);
188 XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, 2, 0);
189 XFreePixmap(dpy, lock->pmap);
190 XDestroyWindow(dpy, lock->win);
196 lockscreen(Display *dpy, int screen)
198 char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
202 XSetWindowAttributes wa;
205 if (dpy == NULL || screen < 0)
208 lock = malloc(sizeof(Lock));
212 lock->screen = screen;
214 lock->root = RootWindow(dpy, lock->screen);
217 wa.override_redirect = 1;
218 wa.background_pixel = BlackPixel(dpy, lock->screen);
219 lock->win = XCreateWindow(dpy, lock->root, 0, 0, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen),
220 0, DefaultDepth(dpy, lock->screen), CopyFromParent,
221 DefaultVisual(dpy, lock->screen), CWOverrideRedirect | CWBackPixel, &wa);
222 XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR2, &color, &dummy);
223 lock->colors[1] = color.pixel;
224 XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR1, &color, &dummy);
225 lock->colors[0] = color.pixel;
226 lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8);
227 invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &color, &color, 0, 0);
228 XDefineCursor(dpy, lock->win, invisible);
229 XMapRaised(dpy, lock->win);
230 for (len = 1000; len; len--) {
231 if (XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
232 GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess)
236 if (running && (len > 0)) {
237 for (len = 1000; len; len--) {
238 if (XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)
244 running &= (len > 0);
246 unlockscreen(dpy, lock);
250 XSelectInput(dpy, lock->root, SubstructureNotifyMask);
259 fprintf(stderr, "usage: slock [-v]\n");
264 main(int argc, char **argv) {
265 #ifndef HAVE_BSD_AUTH
271 if ((argc == 2) && !strcmp("-v", argv[1]))
272 die("slock-%s, © 2006-2015 slock engineers\n", VERSION);
280 if (!getpwuid(getuid()))
281 die("slock: no passwd entry for you\n");
283 #ifndef HAVE_BSD_AUTH
287 if (!(dpy = XOpenDisplay(0)))
288 die("slock: cannot open display\n");
289 /* Get the number of screens in display "dpy" and blank them all. */
290 nscreens = ScreenCount(dpy);
291 locks = malloc(sizeof(Lock *) * nscreens);
293 die("slock: malloc: %s\n", strerror(errno));
295 for (screen = 0; screen < nscreens; screen++) {
296 if ( (locks[screen] = lockscreen(dpy, screen)) != NULL)
301 /* Did we actually manage to lock something? */
302 if (nlocks == 0) { /* nothing to protect */
308 /* Everything is now blank. Now wait for the correct password. */
315 /* Password ok, unlock everything and quit. */
316 for (screen = 0; screen < nscreens; screen++)
317 unlockscreen(dpy, locks[screen]);