Michael Stapelberg
16 years ago
commit
9167263286
5 changed files with 302 additions and 0 deletions
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MIT/X Consortium License |
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© 2006-2008 Anselm R Garbe <garbeam at gmail dot com> |
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© 2009 Michael Stapelberg <michael+i3lock at stapelberg dot de> |
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Permission is hereby granted, free of charge, to any person obtaining a |
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copy of this software and associated documentation files (the "Software"), |
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to deal in the Software without restriction, including without limitation |
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the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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and/or sell copies of the Software, and to permit persons to whom the |
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Software is furnished to do so, subject to the following conditions: |
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The above copyright notice and this permission notice shall be included in |
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all copies or substantial portions of the Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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DEALINGS IN THE SOFTWARE. |
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# slock - simple screen locker
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# © 2006-2007 Anselm R. Garbe, Sander van Dijk
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# © 2009 Michael Stapelberg
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include config.mk |
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SRC = i3lock.c |
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OBJ = ${SRC:.c=.o} |
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all: options i3lock |
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options: |
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@echo i3lock build options: |
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@echo "CFLAGS = ${CFLAGS}" |
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@echo "LDFLAGS = ${LDFLAGS}" |
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@echo "CC = ${CC}" |
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.c.o: |
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@echo CC $< |
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@${CC} -c ${CFLAGS} $< |
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${OBJ}: config.mk |
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i3lock: ${OBJ} |
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@echo CC -o $@ |
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@${CC} -o $@ ${OBJ} ${LDFLAGS} |
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clean: |
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@echo cleaning |
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@rm -f i3lock ${OBJ} i3lock-${VERSION}.tar.gz |
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dist: clean |
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@echo creating dist tarball |
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@mkdir -p i3lock-${VERSION} |
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@cp -R LICENSE Makefile README config.mk ${SRC} slock-${VERSION} |
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@tar -cf i3lock-${VERSION}.tar i3lock-${VERSION} |
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@gzip i3lock-${VERSION}.tar |
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@rm -rf i3lock-${VERSION} |
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install: all |
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@echo installing executable file to $(DESTDIR)$(PREFIX)/bin |
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$(INSTALL) -d $(DESTDIR)$(PREFIX)/bin |
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$(INSTALL) -m 4755 i3lock $(DESTDIR)$(PREFIX)/bin/i3lock |
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uninstall: |
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@echo removing executable file from $(DESTDIR)$(PREFIX)/bin |
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@rm -f $(DESTDIR)$(PREFIX)/bin/i3lock |
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.PHONY: all options clean dist install uninstall |
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i3lock - slightly improved screen locker based on slock |
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============================ |
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i3lock improves slock by making it fork() and therefore combinable with |
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commands to suspend your computer. Additionally, instead of turning of |
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your screen via DPMS and/or displaying a black screen, i3lock displays a |
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white screen so you can see if your computer failed to resume from suspend |
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or if your screen is just locked. Also, when entering a wrong password, |
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i3lock does not call XBell(). This is important because i3lock/slock think |
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you’ve entered a password when resuming from suspend, at least sometimes. |
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i3lock was forked from slock-0.9 |
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Requirements |
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------------ |
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In order to build i3lock you need the Xlib header files. |
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Installation |
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------------ |
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Edit config.mk to match your local setup (slock is installed into |
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the /usr/local namespace by default). |
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Afterwards enter the following command to build and install slock |
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(if necessary as root): |
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make clean install |
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Running i3lock |
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------------- |
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Simply invoke the 'i3lock' command. To get out of it, enter your password. |
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# slock version
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VERSION = 0.9 |
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# Customize below to fit your system
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# paths
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PREFIX = /usr |
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X11INC = /usr/X11R6/include |
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X11LIB = /usr/X11R6/lib |
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# includes and libs
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INCS = -I. -I/usr/include -I${X11INC} |
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LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB} -lX11 -lXext |
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# flags
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CPPFLAGS = -DVERSION=\"${VERSION}\" -DHAVE_SHADOW_H |
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CFLAGS = -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS} |
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LDFLAGS = -s ${LIBS} |
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# On *BSD remove -DHAVE_SHADOW_H from CPPFLAGS and add -DHAVE_BSD_AUTH
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# On OpenBSD and Darwin remove -lcrypt from LIBS
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# compiler and linker
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CC = cc |
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INSTALL=install |
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/* See LICENSE file for license details. */ |
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#define _XOPEN_SOURCE 500 |
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#if HAVE_SHADOW_H |
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#include <shadow.h> |
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#endif |
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#include <ctype.h> |
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#include <pwd.h> |
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#include <stdarg.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include <sys/types.h> |
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#include <X11/keysym.h> |
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#include <X11/Xlib.h> |
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#include <X11/Xutil.h> |
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#if HAVE_BSD_AUTH |
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#include <login_cap.h> |
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#include <bsd_auth.h> |
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#endif |
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static void |
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die(const char *errstr, ...) { |
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va_list ap; |
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va_start(ap, errstr); |
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vfprintf(stderr, errstr, ap); |
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va_end(ap); |
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exit(EXIT_FAILURE); |
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} |
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#ifndef HAVE_BSD_AUTH |
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static const char * |
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get_password() { /* only run as root */ |
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const char *rval; |
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struct passwd *pw; |
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if(geteuid() != 0) |
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die("slock: cannot retrieve password entry (make sure to suid slock)\n"); |
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pw = getpwuid(getuid()); |
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endpwent(); |
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rval = pw->pw_passwd; |
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#if HAVE_SHADOW_H |
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{ |
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struct spwd *sp; |
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sp = getspnam(getenv("USER")); |
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endspent(); |
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rval = sp->sp_pwdp; |
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} |
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#endif |
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/* drop privileges */ |
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if(setgid(pw->pw_gid) < 0 || setuid(pw->pw_uid) < 0) |
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die("slock: cannot drop privileges\n"); |
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return rval; |
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} |
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#endif |
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int |
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main(int argc, char **argv) { |
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char curs[] = {0, 0, 0, 0, 0, 0, 0, 0}; |
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char buf[32], passwd[256]; |
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int num, screen; |
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#ifndef HAVE_BSD_AUTH |
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const char *pws; |
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#endif |
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unsigned int len; |
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Bool running = True; |
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Cursor invisible; |
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Display *dpy; |
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KeySym ksym; |
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Pixmap pmap; |
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Window root, w; |
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XColor black, dummy; |
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XEvent ev; |
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XSetWindowAttributes wa; |
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if((argc == 2) && !strcmp("-v", argv[1])) |
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die("slock-"VERSION", © 2006-2008 Anselm R Garbe\n"); |
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else if(argc != 1) |
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die("usage: slock [-v]\n"); |
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#ifndef HAVE_BSD_AUTH |
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pws = get_password(); |
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#endif |
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if(!(dpy = XOpenDisplay(0))) |
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die("slock: cannot open display\n"); |
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screen = DefaultScreen(dpy); |
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root = RootWindow(dpy, screen); |
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if (fork() != 0) |
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return 0; |
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/* init */ |
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wa.override_redirect = 1; |
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wa.background_pixel = WhitePixel(dpy, screen); |
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w = XCreateWindow(dpy, root, 0, 0, DisplayWidth(dpy, screen), DisplayHeight(dpy, screen), |
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0, DefaultDepth(dpy, screen), CopyFromParent, |
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DefaultVisual(dpy, screen), CWOverrideRedirect | CWBackPixel, &wa); |
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XAllocNamedColor(dpy, DefaultColormap(dpy, screen), "black", &black, &dummy); |
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pmap = XCreateBitmapFromData(dpy, w, curs, 8, 8); |
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invisible = XCreatePixmapCursor(dpy, pmap, pmap, &black, &black, 0, 0); |
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XDefineCursor(dpy, w, invisible); |
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XMapRaised(dpy, w); |
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for(len = 1000; len; len--) { |
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if(XGrabPointer(dpy, root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask, |
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GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess) |
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break; |
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usleep(1000); |
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} |
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if((running = running && (len > 0))) { |
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for(len = 1000; len; len--) { |
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if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime) |
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== GrabSuccess) |
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break; |
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usleep(1000); |
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} |
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running = (len > 0); |
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} |
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len = 0; |
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XSync(dpy, False); |
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/* main event loop */ |
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while(running && !XNextEvent(dpy, &ev)) { |
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if(ev.type == KeyPress) { |
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buf[0] = 0; |
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num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0); |
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if(IsKeypadKey(ksym)) { |
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if(ksym == XK_KP_Enter) |
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ksym = XK_Return; |
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else if(ksym >= XK_KP_0 && ksym <= XK_KP_9) |
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ksym = (ksym - XK_KP_0) + XK_0; |
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} |
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if(IsFunctionKey(ksym) || IsKeypadKey(ksym) |
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|| IsMiscFunctionKey(ksym) || IsPFKey(ksym) |
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|| IsPrivateKeypadKey(ksym)) |
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continue; |
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switch(ksym) { |
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case XK_Return: |
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passwd[len] = 0; |
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#ifdef HAVE_BSD_AUTH |
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running = !auth_userokay(getlogin(), NULL, "auth-xlock", passwd); |
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#else |
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running = strcmp(crypt(passwd, pws), pws); |
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#endif |
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len = 0; |
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break; |
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case XK_Escape: |
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len = 0; |
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break; |
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case XK_BackSpace: |
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if(len) |
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--len; |
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break; |
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default: |
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if(num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) { |
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memcpy(passwd + len, buf, num); |
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len += num; |
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} |
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break; |
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} |
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} |
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} |
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XUngrabPointer(dpy, CurrentTime); |
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XFreePixmap(dpy, pmap); |
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XDestroyWindow(dpy, w); |
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XCloseDisplay(dpy); |
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return 0; |
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} |
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