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>
29 unsigned long colors[2];
34 static Bool running = True;
37 die(const char *errstr, ...) {
41 vfprintf(stderr, errstr, ap);
48 getpw(void) { /* only run as root */
52 pw = getpwuid(getuid());
54 die("slock: cannot retrieve password entry (make sure to suid or sgid slock)");
59 if (strlen(rval) >= 1) { /* kludge, assumes pw placeholder entry has len >= 1 */
61 sp = getspnam(getenv("USER"));
63 die("slock: cannot retrieve shadow entry (make sure to suid or sgid slock)\n");
70 if(setgid(pw->pw_gid) < 0 || setuid(pw->pw_uid) < 0)
71 die("slock: cannot drop privileges");
80 readpw(Display *dpy, const char *pws)
83 char buf[32], passwd[256];
85 unsigned int len, llen;
92 /* As "slock" stands for "Simple X display locker", the DPMS settings
93 * had been removed and you can set it with "xset" or some other
94 * utility. This way the user can easily set a customized DPMS
96 while(running && !XNextEvent(dpy, &ev)) {
97 if(ev.type == KeyPress) {
99 num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0);
100 if(IsKeypadKey(ksym)) {
101 if(ksym == XK_KP_Enter)
103 else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
104 ksym = (ksym - XK_KP_0) + XK_0;
106 if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
107 || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
108 || IsPrivateKeypadKey(ksym))
114 running = !auth_userokay(getlogin(), NULL, "auth-xlock", passwd);
116 running = strcmp(crypt(passwd, pws), pws);
130 if(num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) {
131 memcpy(passwd + len, buf, num);
136 if(llen == 0 && len != 0) {
137 for(screen = 0; screen < nscreens; screen++) {
138 XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[1]);
139 XClearWindow(dpy, locks[screen]->win);
141 } else if(llen != 0 && len == 0) {
142 for(screen = 0; screen < nscreens; screen++) {
143 XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[0]);
144 XClearWindow(dpy, locks[screen]->win);
149 else for(screen = 0; screen < nscreens; screen++)
150 XRaiseWindow(dpy, locks[screen]->win);
155 unlockscreen(Display *dpy, Lock *lock) {
156 if(dpy == NULL || lock == NULL)
159 XUngrabPointer(dpy, CurrentTime);
160 XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, 2, 0);
161 XFreePixmap(dpy, lock->pmap);
162 XDestroyWindow(dpy, lock->win);
168 lockscreen(Display *dpy, int screen) {
169 char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
173 XSetWindowAttributes wa;
176 if(dpy == NULL || screen < 0)
179 lock = malloc(sizeof(Lock));
183 lock->screen = screen;
185 lock->root = RootWindow(dpy, lock->screen);
188 wa.override_redirect = 1;
189 wa.background_pixel = BlackPixel(dpy, lock->screen);
190 lock->win = XCreateWindow(dpy, lock->root, 0, 0, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen),
191 0, DefaultDepth(dpy, lock->screen), CopyFromParent,
192 DefaultVisual(dpy, lock->screen), CWOverrideRedirect | CWBackPixel, &wa);
193 XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR2, &color, &dummy);
194 lock->colors[1] = color.pixel;
195 XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR1, &color, &dummy);
196 lock->colors[0] = color.pixel;
197 lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8);
198 invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &color, &color, 0, 0);
199 XDefineCursor(dpy, lock->win, invisible);
200 XMapRaised(dpy, lock->win);
201 for(len = 1000; len; len--) {
202 if(XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
203 GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess)
207 if(running && (len > 0)) {
208 for(len = 1000; len; len--) {
209 if(XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
218 unlockscreen(dpy, lock);
222 XSelectInput(dpy, lock->root, SubstructureNotifyMask);
229 fprintf(stderr, "usage: slock [-v]\n");
234 main(int argc, char **argv) {
235 #ifndef HAVE_BSD_AUTH
241 if((argc == 2) && !strcmp("-v", argv[1]))
242 die("slock-%s, © 2006-2012 Anselm R Garbe\n", VERSION);
246 if(!getpwuid(getuid()))
247 die("slock: no passwd entry for you");
249 #ifndef HAVE_BSD_AUTH
253 if(!(dpy = XOpenDisplay(0)))
254 die("slock: cannot open display");
255 /* Get the number of screens in display "dpy" and blank them all. */
256 nscreens = ScreenCount(dpy);
257 locks = malloc(sizeof(Lock *) * nscreens);
259 die("slock: malloc: %s", strerror(errno));
260 for(screen = 0; screen < nscreens; screen++)
261 locks[screen] = lockscreen(dpy, screen);
264 /* Everything is now blank. Now wait for the correct password. */
271 /* Password ok, unlock everything and quit. */
272 for(screen = 0; screen < nscreens; screen++)
273 unlockscreen(dpy, locks[screen]);