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>
33 static Bool running = True;
36 die(const char *errstr, ...) {
40 vfprintf(stderr, errstr, ap);
47 getpw(void) { /* only run as root */
51 pw = getpwuid(getuid());
53 die("slock: cannot retrieve password entry (make sure to suid or sgid slock)");
60 sp = getspnam(getenv("USER"));
62 die("slock: cannot retrieve shadow entry (make sure to suid or sgid slock)\n");
69 if(setgid(pw->pw_gid) < 0 || setuid(pw->pw_uid) < 0)
70 die("slock: cannot drop privileges");
79 readpw(Display *dpy, const char *pws)
82 char buf[32], passwd[256];
91 /* As "slock" stands for "Simple X display locker", the DPMS settings
92 * had been removed and you can set it with "xset" or some other
93 * utility. This way the user can easily set a customized DPMS
95 while(running && !XNextEvent(dpy, &ev)) {
96 if(ev.type == KeyPress) {
98 num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0);
99 if(IsKeypadKey(ksym)) {
100 if(ksym == XK_KP_Enter)
102 else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
103 ksym = (ksym - XK_KP_0) + XK_0;
105 if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
106 || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
107 || IsPrivateKeypadKey(ksym))
113 running = !auth_userokay(getlogin(), NULL, "auth-xlock", passwd);
115 running = strcmp(crypt(passwd, pws), pws);
129 if(num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) {
130 memcpy(passwd + len, buf, num);
136 else for(screen = 0; screen < nscreens; screen++)
137 XMapRaised(dpy, locks[screen]->win);
142 unlockscreen(Display *dpy, Lock *lock) {
143 if(dpy == NULL || lock == NULL)
146 XUngrabPointer(dpy, CurrentTime);
147 XFreePixmap(dpy, lock->pmap);
148 XDestroyWindow(dpy, lock->win);
154 lockscreen(Display *dpy, int screen) {
155 char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
159 XSetWindowAttributes wa;
162 if(dpy == NULL || screen < 0)
165 lock = malloc(sizeof(Lock));
169 lock->screen = screen;
171 lock->root = RootWindow(dpy, lock->screen);
174 wa.override_redirect = 1;
175 wa.background_pixel = BlackPixel(dpy, lock->screen);
176 lock->win = XCreateWindow(dpy, lock->root, 0, 0, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen),
177 0, DefaultDepth(dpy, lock->screen), CopyFromParent,
178 DefaultVisual(dpy, lock->screen), CWOverrideRedirect | CWBackPixel, &wa);
179 XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), "black", &black, &dummy);
180 lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8);
181 invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &black, &black, 0, 0);
182 XDefineCursor(dpy, lock->win, invisible);
183 XMapRaised(dpy, lock->win);
184 for(len = 1000; len; len--) {
185 if(XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
186 GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess)
190 if(running && (len > 0)) {
191 for(len = 1000; len; len--) {
192 if(XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
201 unlockscreen(dpy, lock);
210 fprintf(stderr, "usage: slock [-v]");
215 main(int argc, char **argv) {
216 #ifndef HAVE_BSD_AUTH
222 if((argc == 2) && !strcmp("-v", argv[1]))
223 die("slock-%s, © 2006-2012 Anselm R Garbe", VERSION);
227 if(!getpwuid(getuid()))
228 die("slock: no passwd entry for you");
230 #ifndef HAVE_BSD_AUTH
234 if(!(dpy = XOpenDisplay(0)))
235 die("slock: cannot open display");
236 /* Get the number of screens in display "dpy" and blank them all. */
237 nscreens = ScreenCount(dpy);
238 locks = malloc(sizeof(Lock *) * nscreens);
240 die("slock: malloc: %s", strerror(errno));
241 for(screen = 0; screen < nscreens; screen++)
242 locks[screen] = lockscreen(dpy, screen);
245 /* Everything is now blank. Now wait for the correct password. */
252 /* Password ok, unlock everything and quit. */
253 for(screen = 0; screen < nscreens; screen++)
254 unlockscreen(dpy, locks[screen]);