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Crony Akatsuki 2022-07-22 18:29:31 +02:00
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3
.gitignore vendored Normal file
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.ccls-cache
*.rej
*.orig

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LICENSE Normal file
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MIT/X Consortium License
© 2015-2016 Markus Teich <markus.teich@stusta.mhn.de>
© 2014 Dimitris Papastamos <sin@2f30.org>
© 2006-2014 Anselm R Garbe <anselm@garbe.us>
© 2014-2016 Laslo Hunhold <dev@frign.de>
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.

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Makefile Normal file
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# 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/${VERSION}/g" <slock.1 >${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

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README Normal file
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slock - 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.

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/*
* 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

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/* user and group to drop privileges to */
static const char *user = "crony";
static const char *group = "crony";
static const char *colorname[NUMCOLS] = {
[INIT] = "black", /* after initialization */
[INPUT] = "#005577", /* during input */
[FAILED] = "#CC3333", /* wrong password */
[CAPS] = "red", /* CapsLock on */
};
/*
* Xresources preferences to load at startup
*/
ResourcePref resources[] = {
{ "color0", STRING, &colorname[INIT] },
{ "color4", STRING, &colorname[INPUT] },
{ "color1", STRING, &colorname[FAILED] },
{ "color3", STRING, &colorname[CAPS] },
};
/* treat a cleared input like a wrong password (color) */
static const int failonclear = 1;
/* time in seconds before the monitor shuts down */
static const int monitortime = 5;

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/* user and group to drop privileges to */
static const char *user = "crony";
static const char *group = "crony";
static const char *colorname[NUMCOLS] = {
[INIT] = "green", /* after initialization */
[INPUT] = "#005577", /* during input */
[FAILED] = "#CC3333", /* wrong password */
[CAPS] = "red", /* CapsLock on */
};
/*
* Xresources preferences to load at startup
*/
ResourcePref resources[] = {
{ "color6", STRING, &colorname[INIT] },
{ "color4", STRING, &colorname[INPUT] },
{ "color1", STRING, &colorname[FAILED] },
{ "color3", STRING, &colorname[CAPS] },
};
/* treat a cleared input like a wrong password (color) */
static const int failonclear = 1;
/* time in seconds before the monitor shuts down */
static const int monitortime = 5;

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# 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

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/* $OpenBSD: explicit_bzero.c,v 1.3 2014/06/21 02:34:26 matthew Exp $ */
/*
* Public domain.
* Written by Matthew Dempsky.
*/
#include <string.h>
__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);
}

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patch/slock-capscolor-20170106-2d2a21a.diff Normal file
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From 95463f58beb669d9221881deac3b6df7d9c4f162 Mon Sep 17 00:00:00 2001
From: Klemens Nanni <kl3@posteo.org>
Date: Fri, 2 Sep 2016 14:53:30 +0200
Subject: [PATCH] Indicate the state of CapsLock through a different color
---
config.def.h | 1 +
slock.c | 15 ++++++++++++---
2 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/config.def.h b/config.def.h
index 9855e21..6288856 100644
--- a/config.def.h
+++ b/config.def.h
@@ -6,6 +6,7 @@ static const char *colorname[NUMCOLS] = {
[INIT] = "black", /* after initialization */
[INPUT] = "#005577", /* during input */
[FAILED] = "#CC3333", /* wrong password */
+ [CAPS] = "red", /* CapsLock on */
};
/* treat a cleared input like a wrong password (color) */
diff --git a/slock.c b/slock.c
index d55eb3d..d7804f1 100644
--- a/slock.c
+++ b/slock.c
@@ -18,6 +18,7 @@
#include <X11/keysym.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
+#include <X11/XKBlib.h>
#include "arg.h"
#include "util.h"
@@ -28,6 +29,7 @@ enum {
INIT,
INPUT,
FAILED,
+ CAPS,
NUMCOLS
};
@@ -130,16 +132,20 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
{
XRRScreenChangeNotifyEvent *rre;
char buf[32], passwd[256], *inputhash;
- int num, screen, running, failure, oldc;
- unsigned int len, color;
+ int caps, num, screen, running, failure, oldc;
+ unsigned int len, color, indicators;
KeySym ksym;
XEvent ev;
len = 0;
+ caps = 0;
running = 1;
failure = 0;
oldc = INIT;
+ if (!XkbGetIndicatorState(dpy, XkbUseCoreKbd, &indicators))
+ caps = indicators & 1;
+
while (running && !XNextEvent(dpy, &ev)) {
if (ev.type == KeyPress) {
explicit_bzero(&buf, sizeof(buf));
@@ -179,6 +185,9 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
if (len)
passwd[len--] = '\0';
break;
+ case XK_Caps_Lock:
+ caps = !caps;
+ break;
default:
if (num && !iscntrl((int)buf[0]) &&
(len + num < sizeof(passwd))) {
@@ -187,7 +196,7 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
}
break;
}
- color = len ? INPUT : ((failure || failonclear) ? FAILED : INIT);
+ color = len ? (caps ? CAPS : INPUT) : (failure || failonclear ? FAILED : INIT);
if (running && oldc != color) {
for (screen = 0; screen < nscreens; screen++) {
XSetWindowBackground(dpy,
--
2.11.0

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patch/slock-dpms-1.4.diff Normal file
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@ -0,0 +1,62 @@
diff --git a/config.def.h b/config.def.h
index 9855e21..d01bd38 100644
--- a/config.def.h
+++ b/config.def.h
@@ -10,3 +10,6 @@ static const char *colorname[NUMCOLS] = {
/* treat a cleared input like a wrong password (color) */
static const int failonclear = 1;
+
+/* time in seconds before the monitor shuts down */
+static const int monitortime = 5;
diff --git a/slock.c b/slock.c
index d2f0886..f65a43b 100644
--- a/slock.c
+++ b/slock.c
@@ -15,6 +15,7 @@
#include <unistd.h>
#include <sys/types.h>
#include <X11/extensions/Xrandr.h>
+#include <X11/extensions/dpms.h>
#include <X11/keysym.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
@@ -306,6 +307,7 @@ main(int argc, char **argv) {
const char *hash;
Display *dpy;
int s, nlocks, nscreens;
+ CARD16 standby, suspend, off;
ARGBEGIN {
case 'v':
@@ -366,6 +368,20 @@ main(int argc, char **argv) {
if (nlocks != nscreens)
return 1;
+ /* DPMS magic to disable the monitor */
+ if (!DPMSCapable(dpy))
+ die("slock: DPMSCapable failed\n");
+ if (!DPMSEnable(dpy))
+ die("slock: DPMSEnable failed\n");
+ if (!DPMSGetTimeouts(dpy, &standby, &suspend, &off))
+ die("slock: DPMSGetTimeouts failed\n");
+ if (!standby || !suspend || !off)
+ die("slock: at least one DPMS variable is zero\n");
+ if (!DPMSSetTimeouts(dpy, monitortime, monitortime, monitortime))
+ die("slock: DPMSSetTimeouts failed\n");
+
+ XSync(dpy, 0);
+
/* run post-lock command */
if (argc > 0) {
switch (fork()) {
@@ -383,5 +399,9 @@ main(int argc, char **argv) {
/* everything is now blank. Wait for the correct password */
readpw(dpy, &rr, locks, nscreens, hash);
+ /* reset DPMS values to inital ones */
+ DPMSSetTimeouts(dpy, standby, suspend, off);
+ XSync(dpy, 0);
+
return 0;
}

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patch/slock-mediakeys-1.4.diff Normal file
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@ -0,0 +1,31 @@
diff --git a/slock.c b/slock.c
index 5ae738c..bd54be2 100644
--- a/slock.c
+++ b/slock.c
@@ -18,6 +18,7 @@
#include <X11/keysym.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
+#include <X11/XF86keysym.h>
#include "arg.h"
#include "util.h"
@@ -157,6 +158,18 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
IsPrivateKeypadKey(ksym))
continue;
switch (ksym) {
+ case XF86XK_AudioPlay:
+ case XF86XK_AudioStop:
+ case XF86XK_AudioPrev:
+ case XF86XK_AudioNext:
+ case XF86XK_AudioRaiseVolume:
+ case XF86XK_AudioLowerVolume:
+ case XF86XK_AudioMute:
+ case XF86XK_AudioMicMute:
+ case XF86XK_MonBrightnessDown:
+ case XF86XK_MonBrightnessUp:
+ XSendEvent(dpy, DefaultRootWindow(dpy), True, KeyPressMask, &ev);
+ break;
case XK_Return:
passwd[len] = '\0';
errno = 0;

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patch/slock-xresources-20191126-53e56c7.diff Normal file
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@ -0,0 +1,159 @@
From 53e56c751b3f2be4154760788850c51dbffc0add Mon Sep 17 00:00:00 2001
From: Arnas Udovicius <zordsdavini@gmail.com>
Date: Tue, 26 Nov 2019 16:16:15 +0200
Subject: [PATCH] Read colors from Xresources
---
config.def.h | 14 +++++++++--
slock.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++
util.h | 3 +++
3 files changed, 83 insertions(+), 2 deletions(-)
diff --git a/config.def.h b/config.def.h
index 6288856..bfc1ba0 100644
--- a/config.def.h
+++ b/config.def.h
@@ -3,11 +3,21 @@ static const char *user = "nobody";
static const char *group = "nogroup";
static const char *colorname[NUMCOLS] = {
- [INIT] = "black", /* after initialization */
- [INPUT] = "#005577", /* during input */
+ [INIT] = "black", /* after initialization */
+ [INPUT] = "#005577", /* during input */
[FAILED] = "#CC3333", /* wrong password */
[CAPS] = "red", /* CapsLock on */
};
+/*
+ * Xresources preferences to load at startup
+ */
+ResourcePref resources[] = {
+ { "color0", STRING, &colorname[INIT] },
+ { "color4", STRING, &colorname[INPUT] },
+ { "color1", STRING, &colorname[FAILED] },
+ { "color3", STRING, &colorname[CAPS] },
+};
+
/* treat a cleared input like a wrong password (color) */
static const int failonclear = 1;
diff --git a/slock.c b/slock.c
index 5f4fb7a..2395547 100644
--- a/slock.c
+++ b/slock.c
@@ -6,6 +6,7 @@
#include <ctype.h>
#include <errno.h>
+#include <math.h>
#include <grp.h>
#include <pwd.h>
#include <stdarg.h>
@@ -19,6 +20,7 @@
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/XKBlib.h>
+#include <X11/Xresource.h>
#include "arg.h"
#include "util.h"
@@ -46,6 +48,19 @@ struct xrandr {
int errbase;
};
+/* Xresources preferences */
+enum resource_type {
+ STRING = 0,
+ INTEGER = 1,
+ FLOAT = 2
+};
+
+typedef struct {
+ char *name;
+ enum resource_type type;
+ void *dst;
+} ResourcePref;
+
#include "config.h"
static void
@@ -306,6 +321,57 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
return NULL;
}
+int
+resource_load(XrmDatabase db, char *name, enum resource_type rtype, void *dst)
+{
+ char **sdst = dst;
+ int *idst = dst;
+ float *fdst = dst;
+
+ char fullname[256];
+ char fullclass[256];
+ char *type;
+ XrmValue ret;
+
+ snprintf(fullname, sizeof(fullname), "%s.%s", "slock", name);
+ snprintf(fullclass, sizeof(fullclass), "%s.%s", "Slock", name);
+ fullname[sizeof(fullname) - 1] = fullclass[sizeof(fullclass) - 1] = '\0';
+
+ XrmGetResource(db, fullname, fullclass, &type, &ret);
+ if (ret.addr == NULL || strncmp("String", type, 64))
+ return 1;
+
+ switch (rtype) {
+ case STRING:
+ *sdst = ret.addr;
+ break;
+ case INTEGER:
+ *idst = strtoul(ret.addr, NULL, 10);
+ break;
+ case FLOAT:
+ *fdst = strtof(ret.addr, NULL);
+ break;
+ }
+ return 0;
+}
+
+void
+config_init(Display *dpy)
+{
+ char *resm;
+ XrmDatabase db;
+ ResourcePref *p;
+
+ XrmInitialize();
+ resm = XResourceManagerString(dpy);
+ if (!resm)
+ return;
+
+ db = XrmGetStringDatabase(resm);
+ for (p = resources; p < resources + LEN(resources); p++)
+ resource_load(db, p->name, p->type, p->dst);
+}
+
static void
usage(void)
{
@@ -364,6 +430,8 @@ main(int argc, char **argv) {
if (setuid(duid) < 0)
die("slock: setuid: %s\n", strerror(errno));
+ config_init(dpy);
+
/* check for Xrandr support */
rr.active = XRRQueryExtension(dpy, &rr.evbase, &rr.errbase);
diff --git a/util.h b/util.h
index 6f748b8..148dbc1 100644
--- a/util.h
+++ b/util.h
@@ -1,2 +1,5 @@
+/* macros */
+#define LEN(a) (sizeof(a) / sizeof(a)[0])
+
#undef explicit_bzero
void explicit_bzero(void *, size_t);
--
2.24.0

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slock.1 Normal file
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.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.

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slock.c Normal file
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/* See LICENSE file for license details. */
#define _XOPEN_SOURCE 500
#if HAVE_SHADOW_H
#include <shadow.h>
#endif
#include <ctype.h>
#include <errno.h>
#include <math.h>
#include <grp.h>
#include <pwd.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <X11/extensions/Xrandr.h>
#include <X11/extensions/dpms.h>
#include <X11/keysym.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/XF86keysym.h>
#include <X11/XKBlib.h>
#include <X11/Xresource.h>
#include "arg.h"
#include "util.h"
char *argv0;
enum {
INIT,
INPUT,
FAILED,
CAPS,
NUMCOLS
};
struct lock {
int screen;
Window root, win;
Pixmap pmap;
unsigned long colors[NUMCOLS];
};
struct xrandr {
int active;
int evbase;
int errbase;
};
/* Xresources preferences */
enum resource_type {
STRING = 0,
INTEGER = 1,
FLOAT = 2
};
typedef struct {
char *name;
enum resource_type type;
void *dst;
} ResourcePref;
#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 <fcntl.h>
#include <linux/oom.h>
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 caps, num, screen, running, failure, oldc;
unsigned int len, color, indicators;
KeySym ksym;
XEvent ev;
len = 0;
caps = 0;
running = 1;
failure = 0;
oldc = INIT;
if (!XkbGetIndicatorState(dpy, XkbUseCoreKbd, &indicators))
caps = indicators & 1;
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 XF86XK_AudioPlay:
case XF86XK_AudioStop:
case XF86XK_AudioPrev:
case XF86XK_AudioNext:
case XF86XK_AudioRaiseVolume:
case XF86XK_AudioLowerVolume:
case XF86XK_AudioMute:
case XF86XK_AudioMicMute:
case XF86XK_MonBrightnessDown:
case XF86XK_MonBrightnessUp:
XSendEvent(dpy, DefaultRootWindow(dpy), True, KeyPressMask, &ev);
break;
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;
case XK_Caps_Lock:
caps = !caps;
break;
default:
if (num && !iscntrl((int)buf[0]) &&
(len + num < sizeof(passwd))) {
memcpy(passwd + len, buf, num);
len += num;
}
break;
}
color = len ? (caps ? CAPS : 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;
}
int
resource_load(XrmDatabase db, char *name, enum resource_type rtype, void *dst)
{
char **sdst = dst;
int *idst = dst;
float *fdst = dst;
char fullname[256];
char fullclass[256];
char *type;
XrmValue ret;
snprintf(fullname, sizeof(fullname), "%s.%s", "slock", name);
snprintf(fullclass, sizeof(fullclass), "%s.%s", "Slock", name);
fullname[sizeof(fullname) - 1] = fullclass[sizeof(fullclass) - 1] = '\0';
XrmGetResource(db, fullname, fullclass, &type, &ret);
if (ret.addr == NULL || strncmp("String", type, 64))
return 1;
switch (rtype) {
case STRING:
*sdst = ret.addr;
break;
case INTEGER:
*idst = strtoul(ret.addr, NULL, 10);
break;
case FLOAT:
*fdst = strtof(ret.addr, NULL);
break;
}
return 0;
}
void
config_init(Display *dpy)
{
char *resm;
XrmDatabase db;
ResourcePref *p;
XrmInitialize();
resm = XResourceManagerString(dpy);
if (!resm)
return;
db = XrmGetStringDatabase(resm);
for (p = resources; p < resources + LEN(resources); p++)
resource_load(db, p->name, p->type, p->dst);
}
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;
CARD16 standby, suspend, off;
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));
config_init(dpy);
/* 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;
/* DPMS magic to disable the monitor */
if (!DPMSCapable(dpy))
die("slock: DPMSCapable failed\n");
if (!DPMSEnable(dpy))
die("slock: DPMSEnable failed\n");
if (!DPMSGetTimeouts(dpy, &standby, &suspend, &off))
die("slock: DPMSGetTimeouts failed\n");
/* if (!standby || !suspend || !off) */
/* die("slock: at least one DPMS variable is zero\n"); */
if (!DPMSSetTimeouts(dpy, monitortime, monitortime, monitortime))
die("slock: DPMSSetTimeouts failed\n");
XSync(dpy, 0);
/* 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);
/* reset DPMS values to inital ones */
DPMSSetTimeouts(dpy, standby, suspend, off);
XSync(dpy, 0);
return 0;
}

5
util.h Normal file
View File

@ -0,0 +1,5 @@
/* macros */
#define LEN(a) (sizeof(a) / sizeof(a)[0])
#undef explicit_bzero
void explicit_bzero(void *, size_t);