mirror of https://github.com/i3/i3lock.git
Initial import of i3lock 0.9
Michael Stapelberg
commit
9167263286
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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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