slock-1.3/0000755000175000017500000000000012657431176012024 5ustar anselmanselmslock-1.3/LICENSE0000644000175000017500000000232512657431176013033 0ustar anselmanselmMIT/X Consortium License © 2015-2016 Markus Teich © 2014 Dimitris Papastamos © 2006-2014 Anselm R Garbe © 2014-2016 Laslo Hunhold 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. slock-1.3/config.def.h0000644000175000017500000000031212657431176014173 0ustar anselmanselmstatic const char *colorname[NUMCOLS] = { "black", /* after initialization */ "#005577", /* during input */ "#CC3333", /* failed/cleared the input */ }; static const Bool failonclear = True; slock-1.3/README0000644000175000017500000000102212657431176012677 0ustar anselmanselmslock - 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-1.3/Makefile0000644000175000017500000000300612657431176013463 0ustar anselmanselm# 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.h config.mk config.h: @echo creating $@ from config.def.h @cp config.def.h $@ 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.def.h config.mk ${SRC} slock.1 \ slock-${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 @echo installing manual page to ${DESTDIR}${MANPREFIX}/man1 @mkdir -p ${DESTDIR}${MANPREFIX}/man1 @sed "s/VERSION/${VERSION}/g" ${DESTDIR}${MANPREFIX}/man1/slock.1 @chmod 644 ${DESTDIR}${MANPREFIX}/man1/slock.1 uninstall: @echo removing executable file from ${DESTDIR}${PREFIX}/bin @rm -f ${DESTDIR}${PREFIX}/bin/slock @echo removing manual page from ${DESTDIR}${MANPREFIX}/man1 @rm -f ${DESTDIR}${MANPREFIX}/man1/slock.1 .PHONY: all options clean dist install uninstall slock-1.3/slock.10000644000175000017500000000123112657431176013216 0ustar anselmanselm.TH SLOCK 1 slock\-VERSION .SH NAME slock \- simple X display locker .SH SYNOPSIS .B slock .RB [ \-v | .IR post_lock_command ] .SH DESCRIPTION .B slock is a screen locker for X. If provided, the .IR post_lock_command will be executed when the screen is locked. .SH OPTIONS .TP .B \-v prints version information to stdout, then exits. .SH EXAMPLES $ slock /usr/sbin/s2ram .SH CUSTOMIZATION .B slock can be customized by creating a custom config.h and (re)compiling the source code. This keeps it fast, secure and simple. .SH AUTHORS See the LICENSE file for the authors. .SH LICENSE See the LICENSE file for the terms of redistribution. .SH BUGS Please report them. slock-1.3/config.mk0000644000175000017500000000131212657431176013617 0ustar anselmanselm# slock version VERSION = 1.3 # Customize below to fit your system # paths PREFIX = /usr/local MANPREFIX = ${PREFIX}/share/man X11INC = /usr/X11R6/include X11LIB = /usr/X11R6/lib # includes and libs INCS = -I. -I/usr/include -I${X11INC} LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB} -lX11 -lXext -lXrandr # flags CPPFLAGS = -DVERSION=\"${VERSION}\" -DHAVE_SHADOW_H 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-1.3/slock.c0000644000175000017500000002063612657431176013312 0ustar anselmanselm/* 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 #include #if HAVE_BSD_AUTH #include #include #endif enum { INIT, INPUT, FAILED, NUMCOLS }; #include "config.h" typedef struct { int screen; Window root, win; Pixmap pmap; unsigned long colors[NUMCOLS]; } Lock; static Lock **locks; static int nscreens; static Bool running = True; static Bool failure = False; static Bool rr; static int rrevbase; static int rrerrbase; static void die(const char *errstr, ...) { va_list ap; va_start(ap, errstr); vfprintf(stderr, errstr, ap); va_end(ap); exit(1); } #ifdef __linux__ #include #include static void dontkillme(void) { int fd; int length; char value[64]; fd = open("/proc/self/oom_score_adj", O_WRONLY); if (fd < 0 && errno == ENOENT) return; /* convert OOM_SCORE_ADJ_MIN to string for writing */ length = snprintf(value, sizeof(value), "%d\n", OOM_SCORE_ADJ_MIN); /* bail on truncation */ if (length >= sizeof(value)) die("buffer too small\n"); if (fd < 0 || write(fd, value, length) != length || close(fd) != 0) die("cannot disable the out-of-memory killer for this process (make sure to suid or sgid slock)\n"); } #endif #ifndef HAVE_BSD_AUTH /* only run as root */ static const char * getpw(void) { const char *rval; struct passwd *pw; errno = 0; if (!(pw = getpwuid(getuid()))) { if (errno) die("slock: getpwuid: %s\n", strerror(errno)); else die("slock: cannot retrieve password entry\n"); } rval = pw->pw_passwd; #if HAVE_SHADOW_H if (rval[0] == 'x' && rval[1] == '\0') { struct spwd *sp; if (!(sp = getspnam(getenv("USER")))) die("slock: cannot retrieve shadow entry (make sure to suid or sgid slock)\n"); rval = sp->sp_pwdp; } #endif /* drop privileges */ if (geteuid() == 0 && ((getegid() != pw->pw_gid && setgid(pw->pw_gid) < 0) || setuid(pw->pw_uid) < 0)) die("slock: cannot drop privileges\n"); 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, color; KeySym ksym; XEvent ev; static int oldc = INIT; len = 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) { XBell(dpy, 100); failure = True; } 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; } color = len ? INPUT : (failure || failonclear ? FAILED : INIT); if (running && oldc != color) { for (screen = 0; screen < nscreens; screen++) { XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[color]); XClearWindow(dpy, locks[screen]->win); } oldc = color; } } else if (rr && ev.type == rrevbase + RRScreenChangeNotify) { XRRScreenChangeNotifyEvent *rre = (XRRScreenChangeNotifyEvent*)&ev; for (screen = 0; screen < nscreens; screen++) { if (locks[screen]->win == rre->window) { XResizeWindow(dpy, locks[screen]->win, rre->width, rre->height); XClearWindow(dpy, locks[screen]->win); } } } 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, NUMCOLS, 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; int i; Lock *lock; XColor color, dummy; XSetWindowAttributes wa; Cursor invisible; if (!running || dpy == NULL || screen < 0 || !(lock = malloc(sizeof(Lock)))) return NULL; lock->screen = screen; lock->root = RootWindow(dpy, lock->screen); for (i = 0; i < NUMCOLS; i++) { XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), colorname[i], &color, &dummy); lock->colors[i] = color.pixel; } /* init */ wa.override_redirect = 1; wa.background_pixel = lock->colors[INIT]; 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); 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); if (rr) XRRSelectInput(dpy, lock->win, RRScreenChangeNotifyMask); /* Try to grab mouse pointer *and* keyboard, else fail the lock */ for (len = 1000; len; len--) { if (XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask, GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess) break; usleep(1000); } if (!len) { fprintf(stderr, "slock: unable to grab mouse pointer for screen %d\n", screen); } else { for (len = 1000; len; len--) { if (XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess) { /* everything fine, we grabbed both inputs */ XSelectInput(dpy, lock->root, SubstructureNotifyMask); return lock; } usleep(1000); } fprintf(stderr, "slock: unable to grab keyboard for screen %d\n", screen); } /* grabbing one of the inputs failed */ running = 0; unlockscreen(dpy, lock); return NULL; } static void usage(void) { fprintf(stderr, "usage: slock [-v|POST_LOCK_CMD]\n"); exit(1); } 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, © 2006-2016 slock engineers\n", VERSION); if ((argc == 2) && !strcmp("-h", argv[1])) usage(); #ifdef __linux__ dontkillme(); #endif if (!getpwuid(getuid())) die("slock: no passwd entry for you\n"); #ifndef HAVE_BSD_AUTH pws = getpw(); #endif if (!(dpy = XOpenDisplay(0))) die("slock: cannot open display\n"); rr = XRRQueryExtension(dpy, &rrevbase, &rrerrbase); /* Get the number of screens in display "dpy" and blank them all. */ nscreens = ScreenCount(dpy); if (!(locks = malloc(sizeof(Lock*) * nscreens))) die("slock: malloc: %s\n", 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; } if (argc >= 2 && fork() == 0) { if (dpy) close(ConnectionNumber(dpy)); execvp(argv[1], argv+1); die("slock: execvp %s failed: %s\n", argv[1], strerror(errno)); } /* 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; }