From 4d269b7fb1929cc7a57f314c2b21ad1432d15302 Mon Sep 17 00:00:00 2001 From: TiynGER Date: Sun, 29 Mar 2020 19:29:44 +0200 Subject: [PATCH] cleanup --- LICENSE | 24 --- Makefile | 61 -------- README.md | 6 - arg.h | 65 -------- config.def.h | 12 -- config.h | 12 -- config.mk | 32 ---- explicit_bzero.c | 19 --- slock.1 | 39 ----- slock.c | 395 ----------------------------------------------- util.h | 2 - 11 files changed, 667 deletions(-) delete mode 100644 LICENSE delete mode 100644 Makefile delete mode 100644 README.md delete mode 100644 arg.h delete mode 100644 config.def.h delete mode 100644 config.h delete mode 100644 config.mk delete mode 100644 explicit_bzero.c delete mode 100644 slock.1 delete mode 100644 slock.c delete mode 100644 util.h diff --git a/LICENSE b/LICENSE deleted file mode 100644 index 2e4419b..0000000 --- a/LICENSE +++ /dev/null @@ -1,24 +0,0 @@ -MIT/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. diff --git a/Makefile b/Makefile deleted file mode 100644 index f4ffbb7..0000000 --- a/Makefile +++ /dev/null @@ -1,61 +0,0 @@ -# slock - simple screen locker -# See LICENSE file for copyright and license details. - -include config.mk - -SRC = slock.c ${COMPATSRC} -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 arg.h util.h - -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 slock.1 config.mk \ - ${SRC} explicit_bzero.c config.def.h arg.h util.h slock-${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 diff --git a/README.md b/README.md deleted file mode 100644 index eb90766..0000000 --- a/README.md +++ /dev/null @@ -1,6 +0,0 @@ -# slock -This is my patched version of slock. -This belongs to my larbs installation script, meaning it's supposed to work in the environment of the larbs-base-installation. - -## Patches -The list below shows the currently applied patches to this build. diff --git a/arg.h b/arg.h deleted file mode 100644 index 0b23c53..0000000 --- a/arg.h +++ /dev/null @@ -1,65 +0,0 @@ -/* - * Copy me if you can. - * by 20h - */ - -#ifndef ARG_H__ -#define ARG_H__ - -extern char *argv0; - -/* use main(int argc, char *argv[]) */ -#define ARGBEGIN for (argv0 = *argv, argv++, argc--;\ - argv[0] && argv[0][0] == '-'\ - && argv[0][1];\ - argc--, argv++) {\ - char argc_;\ - char **argv_;\ - int brk_;\ - if (argv[0][1] == '-' && argv[0][2] == '\0') {\ - argv++;\ - argc--;\ - break;\ - }\ - for (brk_ = 0, argv[0]++, argv_ = argv;\ - argv[0][0] && !brk_;\ - argv[0]++) {\ - if (argv_ != argv)\ - break;\ - argc_ = argv[0][0];\ - switch (argc_) - -/* Handles obsolete -NUM syntax */ -#define ARGNUM case '0':\ - case '1':\ - case '2':\ - case '3':\ - case '4':\ - case '5':\ - case '6':\ - case '7':\ - case '8':\ - case '9' - -#define ARGEND }\ - } - -#define ARGC() argc_ - -#define ARGNUMF() (brk_ = 1, estrtonum(argv[0], 0, INT_MAX)) - -#define EARGF(x) ((argv[0][1] == '\0' && argv[1] == NULL)?\ - ((x), abort(), (char *)0) :\ - (brk_ = 1, (argv[0][1] != '\0')?\ - (&argv[0][1]) :\ - (argc--, argv++, argv[0]))) - -#define ARGF() ((argv[0][1] == '\0' && argv[1] == NULL)?\ - (char *)0 :\ - (brk_ = 1, (argv[0][1] != '\0')?\ - (&argv[0][1]) :\ - (argc--, argv++, argv[0]))) - -#define LNGARG() &argv[0][0] - -#endif diff --git a/config.def.h b/config.def.h deleted file mode 100644 index 9855e21..0000000 --- a/config.def.h +++ /dev/null @@ -1,12 +0,0 @@ -/* user and group to drop privileges to */ -static const char *user = "nobody"; -static const char *group = "nogroup"; - -static const char *colorname[NUMCOLS] = { - [INIT] = "black", /* after initialization */ - [INPUT] = "#005577", /* during input */ - [FAILED] = "#CC3333", /* wrong password */ -}; - -/* treat a cleared input like a wrong password (color) */ -static const int failonclear = 1; diff --git a/config.h b/config.h deleted file mode 100644 index 27cc2d0..0000000 --- a/config.h +++ /dev/null @@ -1,12 +0,0 @@ -/* user and group to drop privileges to */ -static const char *user = "nobody"; -static const char *group = "nobody"; - -static const char *colorname[NUMCOLS] = { - [INIT] = "black", /* after initialization */ - [INPUT] = "#005577", /* during input */ - [FAILED] = "#CC3333", /* wrong password */ -}; - -/* treat a cleared input like a wrong password (color) */ -static const int failonclear = 1; diff --git a/config.mk b/config.mk deleted file mode 100644 index 74429ae..0000000 --- a/config.mk +++ /dev/null @@ -1,32 +0,0 @@ -# slock version -VERSION = 1.4 - -# 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}\" -D_DEFAULT_SOURCE -DHAVE_SHADOW_H -CFLAGS = -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS} -LDFLAGS = -s ${LIBS} -COMPATSRC = explicit_bzero.c - -# On OpenBSD and Darwin remove -lcrypt from LIBS -#LIBS = -L/usr/lib -lc -L${X11LIB} -lX11 -lXext -lXrandr -# On *BSD remove -DHAVE_SHADOW_H from CPPFLAGS -# On NetBSD add -D_NETBSD_SOURCE to CPPFLAGS -#CPPFLAGS = -DVERSION=\"${VERSION}\" -D_BSD_SOURCE -D_NETBSD_SOURCE -# On OpenBSD set COMPATSRC to empty -#COMPATSRC = - -# compiler and linker -CC = cc diff --git a/explicit_bzero.c b/explicit_bzero.c deleted file mode 100644 index 3e33ca8..0000000 --- a/explicit_bzero.c +++ /dev/null @@ -1,19 +0,0 @@ -/* $OpenBSD: explicit_bzero.c,v 1.3 2014/06/21 02:34:26 matthew Exp $ */ -/* - * Public domain. - * Written by Matthew Dempsky. - */ - -#include - -__attribute__((weak)) void -__explicit_bzero_hook(void *buf, size_t len) -{ -} - -void -explicit_bzero(void *buf, size_t len) -{ - memset(buf, 0, len); - __explicit_bzero_hook(buf, len); -} diff --git a/slock.1 b/slock.1 deleted file mode 100644 index 82cdcd6..0000000 --- a/slock.1 +++ /dev/null @@ -1,39 +0,0 @@ -.Dd 2016-08-23 -.Dt SLOCK 1 -.Sh NAME -.Nm slock -.Nd simple X screen locker -.Sh SYNOPSIS -.Nm -.Op Fl v -.Op Ar cmd Op Ar arg ... -.Sh DESCRIPTION -.Nm -is a simple X screen locker. If provided, -.Ar cmd Op Ar arg ... -is executed after the screen has been locked. -.Sh OPTIONS -.Bl -tag -width Ds -.It Fl v -Print version information to stdout and exit. -.El -.Sh SECURITY CONSIDERATIONS -To make sure a locked screen can not be bypassed by switching VTs -or killing the X server with Ctrl+Alt+Backspace, it is recommended -to disable both in -.Xr xorg.conf 5 -for maximum security: -.Bd -literal -offset left -Section "ServerFlags" - Option "DontVTSwitch" "True" - Option "DontZap" "True" -EndSection -.Ed -.Sh EXAMPLES -$ -.Nm -/usr/sbin/s2ram -.Sh CUSTOMIZATION -.Nm -can be customized by creating a custom config.h from config.def.h and -(re)compiling the source code. This keeps it fast, secure and simple. diff --git a/slock.c b/slock.c deleted file mode 100644 index 5ae738c..0000000 --- a/slock.c +++ /dev/null @@ -1,395 +0,0 @@ -/* 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 -#include - -#include "arg.h" -#include "util.h" - -char *argv0; - -enum { - INIT, - INPUT, - FAILED, - NUMCOLS -}; - -struct lock { - int screen; - Window root, win; - Pixmap pmap; - unsigned long colors[NUMCOLS]; -}; - -struct xrandr { - int active; - int evbase; - int errbase; -}; - -#include "config.h" - -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) -{ - FILE *f; - const char oomfile[] = "/proc/self/oom_score_adj"; - - if (!(f = fopen(oomfile, "w"))) { - if (errno == ENOENT) - return; - die("slock: fopen %s: %s\n", oomfile, strerror(errno)); - } - fprintf(f, "%d", OOM_SCORE_ADJ_MIN); - if (fclose(f)) { - if (errno == EACCES) - die("slock: unable to disable OOM killer. " - "Make sure to suid or sgid slock.\n"); - else - die("slock: fclose %s: %s\n", oomfile, strerror(errno)); - } -} -#endif - -static const char * -gethash(void) -{ - const char *hash; - struct passwd *pw; - - /* Check if the current user has a password entry */ - errno = 0; - if (!(pw = getpwuid(getuid()))) { - if (errno) - die("slock: getpwuid: %s\n", strerror(errno)); - else - die("slock: cannot retrieve password entry\n"); - } - hash = pw->pw_passwd; - -#if HAVE_SHADOW_H - if (!strcmp(hash, "x")) { - struct spwd *sp; - if (!(sp = getspnam(pw->pw_name))) - die("slock: getspnam: cannot retrieve shadow entry. " - "Make sure to suid or sgid slock.\n"); - hash = sp->sp_pwdp; - } -#else - if (!strcmp(hash, "*")) { -#ifdef __OpenBSD__ - if (!(pw = getpwuid_shadow(getuid()))) - die("slock: getpwnam_shadow: cannot retrieve shadow entry. " - "Make sure to suid or sgid slock.\n"); - hash = pw->pw_passwd; -#else - die("slock: getpwuid: cannot retrieve shadow entry. " - "Make sure to suid or sgid slock.\n"); -#endif /* __OpenBSD__ */ - } -#endif /* HAVE_SHADOW_H */ - - return hash; -} - -static void -readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens, - const char *hash) -{ - XRRScreenChangeNotifyEvent *rre; - char buf[32], passwd[256], *inputhash; - int num, screen, running, failure, oldc; - unsigned int len, color; - KeySym ksym; - XEvent ev; - - len = 0; - running = 1; - failure = 0; - oldc = INIT; - - while (running && !XNextEvent(dpy, &ev)) { - if (ev.type == KeyPress) { - explicit_bzero(&buf, sizeof(buf)); - 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'; - errno = 0; - if (!(inputhash = crypt(passwd, hash))) - fprintf(stderr, "slock: crypt: %s\n", strerror(errno)); - else - running = !!strcmp(inputhash, hash); - if (running) { - XBell(dpy, 100); - failure = 1; - } - explicit_bzero(&passwd, sizeof(passwd)); - len = 0; - break; - case XK_Escape: - explicit_bzero(&passwd, sizeof(passwd)); - len = 0; - break; - case XK_BackSpace: - if (len) - passwd[--len] = '\0'; - 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->active && ev.type == rr->evbase + RRScreenChangeNotify) { - rre = (XRRScreenChangeNotifyEvent*)&ev; - for (screen = 0; screen < nscreens; screen++) { - if (locks[screen]->win == rre->window) { - if (rre->rotation == RR_Rotate_90 || - rre->rotation == RR_Rotate_270) - XResizeWindow(dpy, locks[screen]->win, - rre->height, rre->width); - else - XResizeWindow(dpy, locks[screen]->win, - rre->width, rre->height); - XClearWindow(dpy, locks[screen]->win); - break; - } - } - } else { - for (screen = 0; screen < nscreens; screen++) - XRaiseWindow(dpy, locks[screen]->win); - } - } -} - -static struct lock * -lockscreen(Display *dpy, struct xrandr *rr, int screen) -{ - char curs[] = {0, 0, 0, 0, 0, 0, 0, 0}; - int i, ptgrab, kbgrab; - struct lock *lock; - XColor color, dummy; - XSetWindowAttributes wa; - Cursor invisible; - - if (dpy == NULL || screen < 0 || !(lock = malloc(sizeof(struct 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); - - /* Try to grab mouse pointer *and* keyboard for 600ms, else fail the lock */ - for (i = 0, ptgrab = kbgrab = -1; i < 6; i++) { - if (ptgrab != GrabSuccess) { - ptgrab = XGrabPointer(dpy, lock->root, False, - ButtonPressMask | ButtonReleaseMask | - PointerMotionMask, GrabModeAsync, - GrabModeAsync, None, invisible, CurrentTime); - } - if (kbgrab != GrabSuccess) { - kbgrab = XGrabKeyboard(dpy, lock->root, True, - GrabModeAsync, GrabModeAsync, CurrentTime); - } - - /* input is grabbed: we can lock the screen */ - if (ptgrab == GrabSuccess && kbgrab == GrabSuccess) { - XMapRaised(dpy, lock->win); - if (rr->active) - XRRSelectInput(dpy, lock->win, RRScreenChangeNotifyMask); - - XSelectInput(dpy, lock->root, SubstructureNotifyMask); - return lock; - } - - /* retry on AlreadyGrabbed but fail on other errors */ - if ((ptgrab != AlreadyGrabbed && ptgrab != GrabSuccess) || - (kbgrab != AlreadyGrabbed && kbgrab != GrabSuccess)) - break; - - usleep(100000); - } - - /* we couldn't grab all input: fail out */ - if (ptgrab != GrabSuccess) - fprintf(stderr, "slock: unable to grab mouse pointer for screen %d\n", - screen); - if (kbgrab != GrabSuccess) - fprintf(stderr, "slock: unable to grab keyboard for screen %d\n", - screen); - return NULL; -} - -static void -usage(void) -{ - die("usage: slock [-v] [cmd [arg ...]]\n"); -} - -int -main(int argc, char **argv) { - struct xrandr rr; - struct lock **locks; - struct passwd *pwd; - struct group *grp; - uid_t duid; - gid_t dgid; - const char *hash; - Display *dpy; - int s, nlocks, nscreens; - - ARGBEGIN { - case 'v': - fprintf(stderr, "slock-"VERSION"\n"); - return 0; - default: - usage(); - } ARGEND - - /* validate drop-user and -group */ - errno = 0; - if (!(pwd = getpwnam(user))) - die("slock: getpwnam %s: %s\n", user, - errno ? strerror(errno) : "user entry not found"); - duid = pwd->pw_uid; - errno = 0; - if (!(grp = getgrnam(group))) - die("slock: getgrnam %s: %s\n", group, - errno ? strerror(errno) : "group entry not found"); - dgid = grp->gr_gid; - -#ifdef __linux__ - dontkillme(); -#endif - - hash = gethash(); - errno = 0; - if (!crypt("", hash)) - die("slock: crypt: %s\n", strerror(errno)); - - if (!(dpy = XOpenDisplay(NULL))) - die("slock: cannot open display\n"); - - /* drop privileges */ - if (setgroups(0, NULL) < 0) - die("slock: setgroups: %s\n", strerror(errno)); - if (setgid(dgid) < 0) - die("slock: setgid: %s\n", strerror(errno)); - if (setuid(duid) < 0) - die("slock: setuid: %s\n", strerror(errno)); - - /* check for Xrandr support */ - rr.active = XRRQueryExtension(dpy, &rr.evbase, &rr.errbase); - - /* get number of screens in display "dpy" and blank them */ - nscreens = ScreenCount(dpy); - if (!(locks = calloc(nscreens, sizeof(struct lock *)))) - die("slock: out of memory\n"); - for (nlocks = 0, s = 0; s < nscreens; s++) { - if ((locks[s] = lockscreen(dpy, &rr, s)) != NULL) - nlocks++; - else - break; - } - XSync(dpy, 0); - - /* did we manage to lock everything? */ - if (nlocks != nscreens) - return 1; - - /* run post-lock command */ - if (argc > 0) { - switch (fork()) { - case -1: - die("slock: fork failed: %s\n", strerror(errno)); - case 0: - if (close(ConnectionNumber(dpy)) < 0) - die("slock: close: %s\n", strerror(errno)); - execvp(argv[0], argv); - fprintf(stderr, "slock: execvp %s: %s\n", argv[0], strerror(errno)); - _exit(1); - } - } - - /* everything is now blank. Wait for the correct password */ - readpw(dpy, &rr, locks, nscreens, hash); - - return 0; -} diff --git a/util.h b/util.h deleted file mode 100644 index 6f748b8..0000000 --- a/util.h +++ /dev/null @@ -1,2 +0,0 @@ -#undef explicit_bzero -void explicit_bzero(void *, size_t);