slock-1.1/0000755000175000001440000000000012042306064011661 5ustar anselmusersslock-1.1/Makefile0000644000175000001440000000212512042306064013321 0ustar anselmusers# slock - simple screen locker # See LICENSE file for copyright and license details. include config.mk SRC = slock.c OBJ = ${SRC:.c=.o} all: options slock options: @echo slock build options: @echo "CFLAGS = ${CFLAGS}" @echo "LDFLAGS = ${LDFLAGS}" @echo "CC = ${CC}" .c.o: @echo CC $< @${CC} -c ${CFLAGS} $< ${OBJ}: config.mk slock: ${OBJ} @echo CC -o $@ @${CC} -o $@ ${OBJ} ${LDFLAGS} clean: @echo cleaning @rm -f slock ${OBJ} slock-${VERSION}.tar.gz dist: clean @echo creating dist tarball @mkdir -p slock-${VERSION} @cp -R LICENSE Makefile README config.mk ${SRC} slock-${VERSION} @tar -cf slock-${VERSION}.tar slock-${VERSION} @gzip slock-${VERSION}.tar @rm -rf slock-${VERSION} install: all @echo installing executable file to ${DESTDIR}${PREFIX}/bin @mkdir -p ${DESTDIR}${PREFIX}/bin @cp -f slock ${DESTDIR}${PREFIX}/bin @chmod 755 ${DESTDIR}${PREFIX}/bin/slock @chmod u+s ${DESTDIR}${PREFIX}/bin/slock uninstall: @echo removing executable file from ${DESTDIR}${PREFIX}/bin @rm -f ${DESTDIR}${PREFIX}/bin/slock .PHONY: all options clean dist install uninstall slock-1.1/README0000644000175000001440000000102212042306064012534 0ustar anselmusersslock - simple screen locker ============================ simple screen locker utility for X. Requirements ------------ In order to build slock you need the Xlib header files. Installation ------------ Edit config.mk to match your local setup (slock is installed into the /usr/local namespace by default). Afterwards enter the following command to build and install slock (if necessary as root): make clean install Running slock ------------- Simply invoke the 'slock' command. To get out of it, enter your password. slock-1.1/config.mk0000644000175000001440000000131212042306064013454 0ustar anselmusers# slock version VERSION = 1.1 # Customize below to fit your system # paths PREFIX = /usr/local X11INC = /usr/X11R6/include X11LIB = /usr/X11R6/lib # includes and libs INCS = -I. -I/usr/include -I${X11INC} LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB} -lX11 -lXext # flags CPPFLAGS = -DVERSION=\"${VERSION}\" -DHAVE_SHADOW_H -DCOLOR1=\"black\" -DCOLOR2=\"\#005577\" CFLAGS = -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS} LDFLAGS = -s ${LIBS} # On *BSD remove -DHAVE_SHADOW_H from CPPFLAGS and add -DHAVE_BSD_AUTH # On OpenBSD and Darwin remove -lcrypt from LIBS # compiler and linker CC = cc # Install mode. On BSD systems MODE=2755 and GROUP=auth # On others MODE=4755 and GROUP=root #MODE=2755 #GROUP=auth slock-1.1/slock.c0000644000175000001440000001533212042306064013144 0ustar anselmusers /* See LICENSE file for license details. */ #define _XOPEN_SOURCE 500 #if HAVE_SHADOW_H #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #if HAVE_BSD_AUTH #include #include #endif typedef struct { int screen; Window root, win; Pixmap pmap; unsigned long colors[2]; } Lock; static Lock **locks; static int nscreens; static Bool running = True; static void die(const char *errstr, ...) { va_list ap; va_start(ap, errstr); vfprintf(stderr, errstr, ap); va_end(ap); exit(EXIT_FAILURE); } #ifndef HAVE_BSD_AUTH static const char * getpw(void) { /* only run as root */ const char *rval; struct passwd *pw; pw = getpwuid(getuid()); if(!pw) die("slock: cannot retrieve password entry (make sure to suid or sgid slock)"); endpwent(); rval = pw->pw_passwd; #if HAVE_SHADOW_H if (strlen(rval) >= 1) { /* kludge, assumes pw placeholder entry has len >= 1 */ struct spwd *sp; sp = getspnam(getenv("USER")); if(!sp) die("slock: cannot retrieve shadow entry (make sure to suid or sgid slock)\n"); endspent(); rval = sp->sp_pwdp; } #endif /* drop privileges */ if(setgid(pw->pw_gid) < 0 || setuid(pw->pw_uid) < 0) die("slock: cannot drop privileges"); return rval; } #endif static void #ifdef HAVE_BSD_AUTH readpw(Display *dpy) #else readpw(Display *dpy, const char *pws) #endif { char buf[32], passwd[256]; int num, screen; unsigned int len, llen; KeySym ksym; XEvent ev; len = llen = 0; running = True; /* As "slock" stands for "Simple X display locker", the DPMS settings * had been removed and you can set it with "xset" or some other * utility. This way the user can easily set a customized DPMS * timeout. */ while(running && !XNextEvent(dpy, &ev)) { if(ev.type == KeyPress) { buf[0] = 0; num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0); if(IsKeypadKey(ksym)) { if(ksym == XK_KP_Enter) ksym = XK_Return; else if(ksym >= XK_KP_0 && ksym <= XK_KP_9) ksym = (ksym - XK_KP_0) + XK_0; } if(IsFunctionKey(ksym) || IsKeypadKey(ksym) || IsMiscFunctionKey(ksym) || IsPFKey(ksym) || IsPrivateKeypadKey(ksym)) continue; switch(ksym) { case XK_Return: passwd[len] = 0; #ifdef HAVE_BSD_AUTH running = !auth_userokay(getlogin(), NULL, "auth-xlock", passwd); #else running = strcmp(crypt(passwd, pws), pws); #endif if(running != False) XBell(dpy, 100); len = 0; break; case XK_Escape: len = 0; break; case XK_BackSpace: if(len) --len; break; default: if(num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) { memcpy(passwd + len, buf, num); len += num; } break; } if(llen == 0 && len != 0) { for(screen = 0; screen < nscreens; screen++) { XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[1]); XClearWindow(dpy, locks[screen]->win); } } else if(llen != 0 && len == 0) { for(screen = 0; screen < nscreens; screen++) { XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[0]); XClearWindow(dpy, locks[screen]->win); } } llen = len; } else for(screen = 0; screen < nscreens; screen++) XRaiseWindow(dpy, locks[screen]->win); } } static void unlockscreen(Display *dpy, Lock *lock) { if(dpy == NULL || lock == NULL) return; XUngrabPointer(dpy, CurrentTime); XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, 2, 0); XFreePixmap(dpy, lock->pmap); XDestroyWindow(dpy, lock->win); free(lock); } static Lock * lockscreen(Display *dpy, int screen) { char curs[] = {0, 0, 0, 0, 0, 0, 0, 0}; unsigned int len; Lock *lock; XColor color, dummy; XSetWindowAttributes wa; Cursor invisible; if(dpy == NULL || screen < 0) return NULL; lock = malloc(sizeof(Lock)); if(lock == NULL) return NULL; lock->screen = screen; lock->root = RootWindow(dpy, lock->screen); /* init */ wa.override_redirect = 1; wa.background_pixel = BlackPixel(dpy, lock->screen); lock->win = XCreateWindow(dpy, lock->root, 0, 0, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen), 0, DefaultDepth(dpy, lock->screen), CopyFromParent, DefaultVisual(dpy, lock->screen), CWOverrideRedirect | CWBackPixel, &wa); XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR2, &color, &dummy); lock->colors[1] = color.pixel; XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR1, &color, &dummy); lock->colors[0] = color.pixel; lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8); invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &color, &color, 0, 0); XDefineCursor(dpy, lock->win, invisible); XMapRaised(dpy, lock->win); for(len = 1000; len; len--) { if(XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask, GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess) break; usleep(1000); } if(running && (len > 0)) { for(len = 1000; len; len--) { if(XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess) break; usleep(1000); } } running &= (len > 0); if(!running) { unlockscreen(dpy, lock); lock = NULL; } else XSelectInput(dpy, lock->root, SubstructureNotifyMask); return lock; } static void usage(void) { fprintf(stderr, "usage: slock [-v]\n"); exit(EXIT_FAILURE); } int main(int argc, char **argv) { #ifndef HAVE_BSD_AUTH const char *pws; #endif Display *dpy; int screen; if((argc == 2) && !strcmp("-v", argv[1])) die("slock-%s, © 2006-2012 Anselm R Garbe\n", VERSION); else if(argc != 1) usage(); if(!getpwuid(getuid())) die("slock: no passwd entry for you"); #ifndef HAVE_BSD_AUTH pws = getpw(); #endif if(!(dpy = XOpenDisplay(0))) die("slock: cannot open display"); /* Get the number of screens in display "dpy" and blank them all. */ nscreens = ScreenCount(dpy); locks = malloc(sizeof(Lock *) * nscreens); if(locks == NULL) die("slock: malloc: %s", strerror(errno)); int nlocks = 0; for(screen = 0; screen < nscreens; screen++) { if ( (locks[screen] = lockscreen(dpy, screen)) != NULL) nlocks++; } XSync(dpy, False); /* Did we actually manage to lock something? */ if (nlocks == 0) { // nothing to protect free(locks); XCloseDisplay(dpy); return 1; } /* Everything is now blank. Now wait for the correct password. */ #ifdef HAVE_BSD_AUTH readpw(dpy); #else readpw(dpy, pws); #endif /* Password ok, unlock everything and quit. */ for(screen = 0; screen < nscreens; screen++) unlockscreen(dpy, locks[screen]); free(locks); XCloseDisplay(dpy); return 0; } slock-1.1/LICENSE0000644000175000001440000000211112042306064012661 0ustar anselmusersMIT/X Consortium License © 2006-2012 Anselm R Garbe Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.