Update README.md

.gitignore

@@ -1,3 +0,0 @@
-slock
-*.o
-config.h

Makefile

@@ -36,7 +36,7 @@ dist: clean
 	@echo creating dist tarball
 	@mkdir -p slock-${VERSION}
 	@cp -R LICENSE Makefile README slock.1 config.mk \
-		${SRC} config.def.h arg.h util.h slock-${VERSION}
+		${SRC} explicit_bzero.c config.def.h arg.h util.h slock-${VERSION}
 	@tar -cf slock-${VERSION}.tar slock-${VERSION}
 	@gzip slock-${VERSION}.tar
 	@rm -rf slock-${VERSION}

README.md

@@ -1,20 +1,6 @@
 # slock
-
-This is my patched version of slock. The base version is directly from suckless.org.
+This is my patched version of st. The base version is directly from suckless.org.
 
 ## Patches
-
 The list below shows the currently applied patches to the master branch.
-
-- slock-background-image-20220318-1c5a538.diff (shows a background image in locked state)
-- slock-capscolor-20220921-35633d4.diff (displays a separate color if caps is set)
-- slock-dwmlogo-20210324.diff (adds dwm logo on lock screen)
-- slock-git-20161012-control-clear.diff (doesnt turn logo red when pressing control keys)
-- slock-secret-password-1.4.diff (modified) (can give additional passwords that run commands)
-
-## Installation
-
-The most basic way is to clone the repository and then invoke make.
-
-- `git clone https://github.com/tiyn/slock`
-- `make clean install`
+- slock-dpms-1.4.diff (turns off the monitor after a given time)

config.def.h

@@ -1,54 +1,15 @@
 /* user and group to drop privileges to */
-static const char *user  = "user";
+static const char *user  = "nobody";
 static const char *group = "nobody";
 
 static const char *colorname[NUMCOLS] = {
-	[INIT] =   "#2d2d2d",     /* after initialization */
+	[INIT] =   "black",     /* after initialization */
 	[INPUT] =  "#005577",   /* during input */
-	[FAILED] = "#cc3333",   /* wrong password */
-	[CAPS] = "#ff0000",         /* CapsLock on */
+	[FAILED] = "#CC3333",   /* wrong password */
 };
 
 /* treat a cleared input like a wrong password (color) */
 static const int failonclear = 1;
 
-/* Background image path, should be available to the user above */
-static const char* background_image = "/home/user/.local/share/lock";
-/* insert grid pattern with scale 1:1, the size can be changed with logosize */
-static const int logosize = 40;
-static const int logow = 10;	/* grid width and height for right center alignment*/
-static const int logoh = 15;
-
-static XRectangle rectangles[12] = {
-	/* x	y	w	h */
-	{ 0,	0,	1,	3 },
-	{ 0,	7,	4,	2 },
-	{ 1,	0,	1,	4 },
-	{ 2,	2,	1,	3 },
-	{ 3,	3,	1,	3 },
-	{ 4,	0,	2,	2 },
-	{ 4,	4,	2,	11 },
-	{ 6,	3,	1,	3 },
-	{ 6,	7,	4,	2 },
-	{ 7,	2,	1,	3 },
-	{ 8,	0,	1,	4 },
-	{ 9,	0,	1,	3 },
-};
-
-/* allow control key to trigger fail on clear */
-static const int controlkeyclear = 1;
-
-/* struct for secret passwords and commands */
-struct secretpass {
-  char const *pass;
-  char const *command;
-};
-
-/* list of secret passwords and their commands */
-static const struct secretpass scom[1] = {
-/*	 Password				command */
-  {"shutdown",           "sudo shutdown -h now"},
-};
-
-/* length of entries in scom */
-static const int entrylen = 1;
+/* time in seconds before the monitor shuts down */
+static const int monitortime = 3;

config.h

@@ -0,0 +1,15 @@
+/* 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;
+
+/* time in seconds before the monitor shuts down */
+static const int monitortime = 3;

config.mk

@@ -1,5 +1,5 @@
 # slock version
-VERSION = 1.5
+VERSION = 1.4
 
 # Customize below to fit your system
 
@@ -10,20 +10,12 @@ MANPREFIX = ${PREFIX}/share/man
 X11INC = /usr/X11R6/include
 X11LIB = /usr/X11R6/lib
 
-# Xinerama, comment if you don't want it
-XINERAMALIBS  = -lXinerama
-XINERAMAFLAGS = -DXINERAMA
-
-# freetype
-FREETYPELIBS = -lXft
-FREETYPEINC = /usr/include/freetype2
-
 # includes and libs
-INCS = -I. -I/usr/include -I${X11INC} -I${FREETYPEINC}
-LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB} -lX11 ${XINERAMALIBS} ${FREETYPELIBS} -lXext -lXrandr -lImlib2
+INCS = -I. -I/usr/include -I${X11INC}
+LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB} -lX11 -lXext -lXrandr
 
 # flags
-CPPFLAGS = -DVERSION=\"${VERSION}\" -D_DEFAULT_SOURCE -DHAVE_SHADOW_H ${XINERAMAFLAGS}
+CPPFLAGS = -DVERSION=\"${VERSION}\" -D_DEFAULT_SOURCE -DHAVE_SHADOW_H
 CFLAGS = -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
 LDFLAGS = -s ${LIBS}
 COMPATSRC = explicit_bzero.c

slock-background-image-20220318-1c5a538.diff

@@ -1,149 +0,0 @@
-From 1c5a5383a1cf3351fe9c80a21cfbc98c5ec4355d Mon Sep 17 00:00:00 2001
-From: Yan Doroshenko <yan1994doroshenko@gmail.com>
-Date: Fri, 18 Mar 2022 12:28:13 +0100
-Subject: [PATCH] Provide a way to set a background image
-
----
- config.def.h |  5 ++++-
- config.mk    |  2 +-
- slock.c      | 50 +++++++++++++++++++++++++++++++++++++++++++++++---
- 3 files changed, 52 insertions(+), 5 deletions(-)
-
-diff --git a/config.def.h b/config.def.h
-index 9855e21..eb88b3d 100644
---- a/config.def.h
-+++ b/config.def.h
-@@ -1,6 +1,6 @@
- /* user and group to drop privileges to */
- static const char *user  = "nobody";
--static const char *group = "nogroup";
-+static const char *group = "nobody";
- 
- static const char *colorname[NUMCOLS] = {
- 	[INIT] =   "black",     /* after initialization */
-@@ -10,3 +10,6 @@ static const char *colorname[NUMCOLS] = {
- 
- /* treat a cleared input like a wrong password (color) */
- static const int failonclear = 1;
-+
-+/* Background image path, should be available to the user above */
-+static const char* background_image = "";
-diff --git a/config.mk b/config.mk
-index 74429ae..987819e 100644
---- a/config.mk
-+++ b/config.mk
-@@ -12,7 +12,7 @@ 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
-+LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB} -lX11 -lXext -lXrandr -lImlib2
- 
- # flags
- CPPFLAGS = -DVERSION=\"${VERSION}\" -D_DEFAULT_SOURCE -DHAVE_SHADOW_H
-diff --git a/slock.c b/slock.c
-index 5ae738c..345a279 100644
---- a/slock.c
-+++ b/slock.c
-@@ -18,6 +18,7 @@
- #include <X11/keysym.h>
- #include <X11/Xlib.h>
- #include <X11/Xutil.h>
-+#include <Imlib2.h>
- 
- #include "arg.h"
- #include "util.h"
-@@ -35,6 +36,7 @@ struct lock {
- 	int screen;
- 	Window root, win;
- 	Pixmap pmap;
-+	Pixmap bgmap;
- 	unsigned long colors[NUMCOLS];
- };
- 
-@@ -46,6 +48,8 @@ struct xrandr {
- 
- #include "config.h"
- 
-+Imlib_Image image;
-+
- static void
- die(const char *errstr, ...)
- {
-@@ -190,9 +194,10 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
- 			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]);
-+                                        if (locks[screen]->bgmap)
-+                                                XSetWindowBackgroundPixmap(dpy, locks[screen]->win, locks[screen]->bgmap);
-+                                        else
-+                                                XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[0]);
- 					XClearWindow(dpy, locks[screen]->win);
- 				}
- 				oldc = color;
-@@ -235,6 +240,17 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
- 	lock->screen = screen;
- 	lock->root = RootWindow(dpy, lock->screen);
- 
-+        if(image)
-+        {
-+            lock->bgmap = XCreatePixmap(dpy, lock->root, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen), DefaultDepth(dpy, lock->screen));
-+            imlib_context_set_display(dpy);
-+            imlib_context_set_visual(DefaultVisual(dpy, lock->screen));
-+            imlib_context_set_colormap(DefaultColormap(dpy, lock->screen));
-+            imlib_context_set_drawable(lock->bgmap);
-+            imlib_render_image_on_drawable(0, 0);
-+            imlib_free_image();
-+        }
-+
- 	for (i = 0; i < NUMCOLS; i++) {
- 		XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen),
- 		                 colorname[i], &color, &dummy);
-@@ -251,6 +267,8 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
- 	                          CopyFromParent,
- 	                          DefaultVisual(dpy, lock->screen),
- 	                          CWOverrideRedirect | CWBackPixel, &wa);
-+        if(lock->bgmap)
-+          XSetWindowBackgroundPixmap(dpy, lock->win, lock->bgmap);
- 	lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8);
- 	invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap,
- 	                                &color, &color, 0, 0);
-@@ -355,6 +373,32 @@ main(int argc, char **argv) {
- 	if (setuid(duid) < 0)
- 		die("slock: setuid: %s\n", strerror(errno));
- 
-+	/* Load picture */
-+        Imlib_Image buffer = imlib_load_image(background_image);
-+	imlib_context_set_image(buffer);
-+        int background_image_width = imlib_image_get_width();
-+        int background_image_height = imlib_image_get_height();
-+
-+        /* Create an image to be rendered */
-+	Screen *scr = ScreenOfDisplay(dpy, DefaultScreen(dpy));
-+	image = imlib_create_image(scr->width, scr->height);
-+        imlib_context_set_image(image);
-+
-+        /* Fill the image for every X monitor */
-+        XRRMonitorInfo	*monitors;
-+        int number_of_monitors;
-+        monitors = XRRGetMonitors(dpy, RootWindow(dpy, XScreenNumberOfScreen(scr)), True, &number_of_monitors);
-+
-+        int i;
-+        for (i = 0; i < number_of_monitors; i++) {
-+            imlib_blend_image_onto_image(buffer, 0, 0, 0, background_image_width, background_image_height, monitors[i].x, monitors[i].y, monitors[i].width, monitors[i].height);
-+        }
-+
-+        /* Clean up */
-+        imlib_context_set_image(buffer);
-+        imlib_free_image();
-+        imlib_context_set_image(image);
-+
- 	/* check for Xrandr support */
- 	rr.active = XRRQueryExtension(dpy, &rr.evbase, &rr.errbase);
- 
--- 
-2.35.1
-

slock-capscolor-20220921-35633d4.diff

@@ -1,88 +0,0 @@
-From da1721b1b4bb0aa8f94537ddd2a3eada1df00a30 Mon Sep 17 00:00:00 2001
-From: Max Schillinger <maxschillinger@web.de>
-Date: Wed, 21 Sep 2022 19:56:58 +0200
-Subject: [PATCH] Update capscolor patch to match the latest slock commit
- (35633d4)
-
----
- 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 5ae738c..5f4fb7a 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,
--- 
-2.37.3
-

slock-dpms-1.4.diff

@@ -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;
+ }

slock-dwmlogo-20210324.diff

@@ -1,246 +0,0 @@
-diff --git a/config.def.h b/config.def.h
-index 9855e21..0940fb8 100644
---- a/config.def.h
-+++ b/config.def.h
-@@ -3,10 +3,30 @@ static const char *user  = "nobody";
- static const char *group = "nogroup";
- 
- static const char *colorname[NUMCOLS] = {
--	[INIT] =   "black",     /* after initialization */
-+	[BACKGROUND] =   "black",     /* after initialization */
-+	[INIT] =   "#2d2d2d",     /* after initialization */
- 	[INPUT] =  "#005577",   /* during input */
- 	[FAILED] = "#CC3333",   /* wrong password */
- };
- 
- /* treat a cleared input like a wrong password (color) */
- static const int failonclear = 1;
-+
-+/* insert grid pattern with scale 1:1, the size can be changed with logosize */
-+static const int logosize = 75;
-+static const int logow = 12;	/* grid width and height for right center alignment*/
-+static const int logoh = 6;
-+
-+static XRectangle rectangles[9] = {
-+	/* x	y	w	h */
-+	{ 0,	3,	1,	3 },
-+	{ 1,	3,	2,	1 },
-+	{ 0,	5,	8,	1 },
-+	{ 3,	0,	1,	5 },
-+	{ 5,	3,	1,	2 },
-+	{ 7,	3,	1,	2 },
-+	{ 8,	3,	4,	1 },
-+	{ 9,	4,	1,	2 },
-+	{ 11,	4,	1,	2 },
-+
-+};
-diff --git a/config.mk b/config.mk
-index 74429ae..08356e8 100644
---- a/config.mk
-+++ b/config.mk
-@@ -10,12 +10,20 @@ MANPREFIX = ${PREFIX}/share/man
- X11INC = /usr/X11R6/include
- X11LIB = /usr/X11R6/lib
- 
-+# Xinerama, comment if you don't want it
-+XINERAMALIBS  = -lXinerama
-+XINERAMAFLAGS = -DXINERAMA
-+
-+# freetype
-+FREETYPELIBS = -lXft
-+FREETYPEINC = /usr/include/freetype2
-+
- # includes and libs
--INCS = -I. -I/usr/include -I${X11INC}
--LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB} -lX11 -lXext -lXrandr
-+INCS = -I. -I/usr/include -I${X11INC} -I${FREETYPEINC}
-+LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB} -lX11 ${XINERAMALIBS} ${FREETYPELIBS} -lXext -lXrandr
- 
- # flags
--CPPFLAGS = -DVERSION=\"${VERSION}\" -D_DEFAULT_SOURCE -DHAVE_SHADOW_H
-+CPPFLAGS = -DVERSION=\"${VERSION}\" -D_DEFAULT_SOURCE -DHAVE_SHADOW_H ${XINERAMAFLAGS}
- CFLAGS = -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
- LDFLAGS = -s ${LIBS}
- COMPATSRC = explicit_bzero.c
-diff --git a/slock.c b/slock.c
-index 5ae738c..3ea9b7f 100644
---- a/slock.c
-+++ b/slock.c
-@@ -1,5 +1,6 @@
- /* See LICENSE file for license details. */
--#define _XOPEN_SOURCE 500
-+#define _XOPEN_SOURCE   500
-+#define LENGTH(X)       (sizeof X / sizeof X[0])
- #if HAVE_SHADOW_H
- #include <shadow.h>
- #endif
-@@ -15,9 +16,13 @@
- #include <unistd.h>
- #include <sys/types.h>
- #include <X11/extensions/Xrandr.h>
-+#ifdef XINERAMA
-+#include <X11/extensions/Xinerama.h>
-+#endif
- #include <X11/keysym.h>
- #include <X11/Xlib.h>
- #include <X11/Xutil.h>
-+#include <X11/Xft/Xft.h>
- 
- #include "arg.h"
- #include "util.h"
-@@ -25,17 +30,25 @@
- char *argv0;
- 
- enum {
-+	BACKGROUND,
- 	INIT,
- 	INPUT,
- 	FAILED,
- 	NUMCOLS
- };
- 
-+#include "config.h"
-+
- struct lock {
- 	int screen;
- 	Window root, win;
- 	Pixmap pmap;
- 	unsigned long colors[NUMCOLS];
-+	unsigned int x, y;
-+	unsigned int xoff, yoff, mw, mh;
-+	Drawable drawable;
-+	GC gc;
-+	XRectangle rectangles[LENGTH(rectangles)];
- };
- 
- struct xrandr {
-@@ -44,8 +57,6 @@ struct xrandr {
- 	int errbase;
- };
- 
--#include "config.h"
--
- static void
- die(const char *errstr, ...)
- {
-@@ -124,6 +135,32 @@ gethash(void)
- 	return hash;
- }
- 
-+static void
-+resizerectangles(struct lock *lock)
-+{
-+	int i;
-+
-+	for (i = 0; i < LENGTH(rectangles); i++){
-+		lock->rectangles[i].x = (rectangles[i].x * logosize)
-+                                + lock->xoff + ((lock->mw) / 2) - (logow / 2 * logosize);
-+		lock->rectangles[i].y = (rectangles[i].y * logosize)
-+                                + lock->yoff + ((lock->mh) / 2) - (logoh / 2 * logosize);
-+		lock->rectangles[i].width = rectangles[i].width * logosize;
-+		lock->rectangles[i].height = rectangles[i].height * logosize;
-+	}
-+}
-+
-+static void
-+drawlogo(Display *dpy, struct lock *lock, int color)
-+{
-+	XSetForeground(dpy, lock->gc, lock->colors[BACKGROUND]);
-+	XFillRectangle(dpy, lock->drawable, lock->gc, 0, 0, lock->x, lock->y);
-+	XSetForeground(dpy, lock->gc, lock->colors[color]);
-+	XFillRectangles(dpy, lock->drawable, lock->gc, lock->rectangles, LENGTH(rectangles));
-+	XCopyArea(dpy, lock->drawable, lock->win, lock->gc, 0, 0, lock->x, lock->y, 0, 0);
-+	XSync(dpy, False);
-+}
-+
- static void
- readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
-        const char *hash)
-@@ -190,10 +227,7 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
- 			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);
-+					drawlogo(dpy, locks[screen], color);
- 				}
- 				oldc = color;
- 			}
-@@ -228,6 +262,10 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
- 	XColor color, dummy;
- 	XSetWindowAttributes wa;
- 	Cursor invisible;
-+#ifdef XINERAMA
-+	XineramaScreenInfo *info;
-+	int n;
-+#endif
- 
- 	if (dpy == NULL || screen < 0 || !(lock = malloc(sizeof(struct lock))))
- 		return NULL;
-@@ -241,12 +279,31 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
- 		lock->colors[i] = color.pixel;
- 	}
- 
-+	lock->x = DisplayWidth(dpy, lock->screen);
-+	lock->y = DisplayHeight(dpy, lock->screen);
-+#ifdef XINERAMA
-+	if ((info = XineramaQueryScreens(dpy, &n))) {
-+		lock->xoff = info[0].x_org;
-+		lock->yoff = info[0].y_org;
-+		lock->mw = info[0].width;
-+		lock->mh = info[0].height;
-+	} else
-+#endif
-+	{
-+		lock->xoff = lock->yoff = 0;
-+		lock->mw = lock->x;
-+		lock->mh = lock->y;
-+	}
-+	lock->drawable = XCreatePixmap(dpy, lock->root,
-+            lock->x, lock->y, DefaultDepth(dpy, screen));
-+	lock->gc = XCreateGC(dpy, lock->root, 0, NULL);
-+	XSetLineAttributes(dpy, lock->gc, 1, LineSolid, CapButt, JoinMiter);
-+
- 	/* init */
- 	wa.override_redirect = 1;
--	wa.background_pixel = lock->colors[INIT];
-+	wa.background_pixel = lock->colors[BACKGROUND];
- 	lock->win = XCreateWindow(dpy, lock->root, 0, 0,
--	                          DisplayWidth(dpy, lock->screen),
--	                          DisplayHeight(dpy, lock->screen),
-+	                          lock->x, lock->y,
- 	                          0, DefaultDepth(dpy, lock->screen),
- 	                          CopyFromParent,
- 	                          DefaultVisual(dpy, lock->screen),
-@@ -256,6 +313,8 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
- 	                                &color, &color, 0, 0);
- 	XDefineCursor(dpy, lock->win, invisible);
- 
-+	resizerectangles(lock);
-+
- 	/* 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) {
-@@ -276,6 +335,7 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
- 				XRRSelectInput(dpy, lock->win, RRScreenChangeNotifyMask);
- 
- 			XSelectInput(dpy, lock->root, SubstructureNotifyMask);
-+			drawlogo(dpy, lock, INIT);
- 			return lock;
- 		}
- 
-@@ -391,5 +451,12 @@ main(int argc, char **argv) {
- 	/* everything is now blank. Wait for the correct password */
- 	readpw(dpy, &rr, locks, nscreens, hash);
- 
-+	for (nlocks = 0, s = 0; s < nscreens; s++) {
-+		XFreePixmap(dpy, locks[s]->drawable);
-+		XFreeGC(dpy, locks[s]->gc);
-+	}
-+
-+	XSync(dpy, 0);
-+	XCloseDisplay(dpy);
- 	return 0;
- }

slock-git-20161012-control-clear.diff

@@ -1,27 +0,0 @@
-diff --git a/config.def.h b/config.def.h
-index 6fba2b6..933152b 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 */
- static const int failonclear = 1;
-+
-+/* allow control key to trigger fail on clear */
-+static const int controlkeyclear = 0;
-diff --git a/slock.c b/slock.c
-index 4d7f06f..15552ef 100644
---- a/slock.c
-+++ b/slock.c
-@@ -180,8 +180,9 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
- 					passwd[len--] = '\0';
- 				break;
- 			default:
--				if (num && !iscntrl((int)buf[0]) &&
--				    (len + num < sizeof(passwd))) {
-+				if (controlkeyclear && iscntrl((int)buf[0]))
-+					continue;
-+				if (num && (len + num < sizeof(passwd))) {
- 					memcpy(passwd + len, buf, num);
- 					len += num;
- 				}

slock-secret-password-1.4.diff

@@ -1,33 +0,0 @@
-diff --git a/config.def.h b/config.def.h
-index 9855e21..989ca08 100644
---- a/config.def.h
-+++ b/config.def.h
-@@ -10,3 +10,10 @@ static const char *colorname[NUMCOLS] = {
- 
- /* treat a cleared input like a wrong password (color) */
- static const int failonclear = 1;
-+
-+/* length of entires in scom  */
-s
-+static const int entrylen = 1;
-
-+
-+static const secretpass scom[entrylen] = {
-+/*	 Password				command */
-+	{ "shutdown",           "doas poweroff" },
-};
-diff --git a/slock.c b/slock.c
-index d2f0886..6a96a2d 100644
---- a/slock.c
-+++ b/slock.c
-@@ -160,6 +160,13 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
- 			case XK_Return:
- 				passwd[len] = '\0';
- 				errno = 0;
-+
-+				for (int i = 0; i < entrylen; i++){
-+					if (strcmp(scom[i].pass, passwd) == 0){
-+						system(scom[i].command);
-+					}
-+				}
-+

slock.c

@@ -1,6 +1,5 @@
 /* See LICENSE file for license details. */
-#define _XOPEN_SOURCE   500
-#define LENGTH(X)       (sizeof X / sizeof X[0])
+#define _XOPEN_SOURCE 500
 #if HAVE_SHADOW_H
 #include <shadow.h>
 #endif
@@ -16,15 +15,10 @@
 #include <unistd.h>
 #include <sys/types.h>
 #include <X11/extensions/Xrandr.h>
-#ifdef XINERAMA
-#include <X11/extensions/Xinerama.h>
-#endif
+#include <X11/extensions/dpms.h>
 #include <X11/keysym.h>
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
-#include <Imlib2.h>
-#include <X11/Xft/Xft.h>
-#include <X11/XKBlib.h>
 
 #include "arg.h"
 #include "util.h"
@@ -35,23 +29,14 @@ enum {
 	INIT,
 	INPUT,
 	FAILED,
-	CAPS,
 	NUMCOLS
 };
 
-#include "config.h"
-
 struct lock {
 	int screen;
 	Window root, win;
 	Pixmap pmap;
-	Pixmap bgmap;
 	unsigned long colors[NUMCOLS];
-	unsigned int x, y;
-	unsigned int xoff, yoff, mw, mh;
-	Drawable drawable;
-	GC gc;
-	XRectangle rectangles[LENGTH(rectangles)];
 };
 
 struct xrandr {
@@ -60,7 +45,8 @@ struct xrandr {
 	int errbase;
 };
 
-Imlib_Image image;
+#include "config.h"
+
 static void
 die(const char *errstr, ...)
 {
@@ -139,49 +125,22 @@ gethash(void)
 	return hash;
 }
 
-static void
-resizerectangles(struct lock *lock)
-{
-	int i;
-
-	for (i = 0; i < LENGTH(rectangles); i++){
-		lock->rectangles[i].x = (rectangles[i].x * logosize)
-                                + lock->xoff + ((lock->mw) / 2) - (logow / 2 * logosize);
-		lock->rectangles[i].y = (rectangles[i].y * logosize)
-                                + lock->yoff + ((lock->mh) / 2) - (logoh / 2 * logosize);
-		lock->rectangles[i].width = rectangles[i].width * logosize;
-		lock->rectangles[i].height = rectangles[i].height * logosize;
-	}
-}
-
-static void
-drawlogo(Display *dpy, struct lock *lock, int color)
-{
-	XSetForeground(dpy, lock->gc, lock->colors[color]);
-	XFillRectangles(dpy, lock->win, lock->gc, lock->rectangles, LENGTH(rectangles));
-	XSync(dpy, False);
-}
-
 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;
+	int num, screen, running, failure, oldc;
+	unsigned int len, color;
 	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));
@@ -202,12 +161,6 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
 			case XK_Return:
 				passwd[len] = '\0';
 				errno = 0;
-				for (int i = 0; i < entrylen; i++){
-				    if (strcmp(scom[i].pass, passwd) == 0){
-				    	system(scom[i].command);
-				    }
-                                }
-
 				if (!(inputhash = crypt(passwd, hash)))
 					fprintf(stderr, "slock: crypt: %s\n", strerror(errno));
 				else
@@ -227,27 +180,21 @@ 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 (controlkeyclear && iscntrl((int)buf[0]))
-					continue;
-				if (num && (len + num < sizeof(passwd))) {
+				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);
+			color = len ? INPUT : ((failure || failonclear) ? FAILED : INIT);
 			if (running && oldc != color) {
 				for (screen = 0; screen < nscreens; screen++) {
-                                        if (locks[screen]->bgmap)
-                                                XSetWindowBackgroundPixmap(dpy, locks[screen]->win, locks[screen]->bgmap);
-                                        else
-                                                XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[0]);
+					XSetWindowBackground(dpy,
+					                     locks[screen]->win,
+					                     locks[screen]->colors[color]);
 					XClearWindow(dpy, locks[screen]->win);
-					drawlogo(dpy, locks[screen], color);
 				}
 				oldc = color;
 			}
@@ -282,10 +229,6 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
 	XColor color, dummy;
 	XSetWindowAttributes wa;
 	Cursor invisible;
-#ifdef XINERAMA
-	XineramaScreenInfo *info;
-	int n;
-#endif
 
 	if (dpy == NULL || screen < 0 || !(lock = malloc(sizeof(struct lock))))
 		return NULL;
@@ -293,61 +236,27 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
 	lock->screen = screen;
 	lock->root = RootWindow(dpy, lock->screen);
 
-        if(image)
-        {
-            lock->bgmap = XCreatePixmap(dpy, lock->root, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen), DefaultDepth(dpy, lock->screen));
-            imlib_context_set_display(dpy);
-            imlib_context_set_visual(DefaultVisual(dpy, lock->screen));
-            imlib_context_set_colormap(DefaultColormap(dpy, lock->screen));
-            imlib_context_set_drawable(lock->bgmap);
-            imlib_render_image_on_drawable(0, 0);
-            imlib_free_image();
-        }
-
 	for (i = 0; i < NUMCOLS; i++) {
 		XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen),
 		                 colorname[i], &color, &dummy);
 		lock->colors[i] = color.pixel;
 	}
 
-	lock->x = DisplayWidth(dpy, lock->screen);
-	lock->y = DisplayHeight(dpy, lock->screen);
-#ifdef XINERAMA
-	if ((info = XineramaQueryScreens(dpy, &n))) {
-		lock->xoff = info[0].x_org;
-		lock->yoff = info[0].y_org;
-		lock->mw = info[0].width;
-		lock->mh = info[0].height;
-	} else
-#endif
-	{
-		lock->xoff = lock->yoff = 0;
-		lock->mw = lock->x;
-		lock->mh = lock->y;
-	}
-	lock->drawable = XCreatePixmap(dpy, lock->root,
-            lock->x, lock->y, DefaultDepth(dpy, screen));
-	lock->gc = XCreateGC(dpy, lock->root, 0, NULL);
-	XSetLineAttributes(dpy, lock->gc, 1, LineSolid, CapButt, JoinMiter);
-
 	/* init */
 	wa.override_redirect = 1;
 	wa.background_pixel = lock->colors[INIT];
 	lock->win = XCreateWindow(dpy, lock->root, 0, 0,
-	                          lock->x, lock->y,
+	                          DisplayWidth(dpy, lock->screen),
+	                          DisplayHeight(dpy, lock->screen),
 	                          0, DefaultDepth(dpy, lock->screen),
 	                          CopyFromParent,
 	                          DefaultVisual(dpy, lock->screen),
 	                          CWOverrideRedirect | CWBackPixel, &wa);
-        if(lock->bgmap)
-          XSetWindowBackgroundPixmap(dpy, lock->win, lock->bgmap);
 	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);
 
-	resizerectangles(lock);
-
 	/* 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) {
@@ -368,7 +277,6 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
 				XRRSelectInput(dpy, lock->win, RRScreenChangeNotifyMask);
 
 			XSelectInput(dpy, lock->root, SubstructureNotifyMask);
-			drawlogo(dpy, lock, INIT);
 			return lock;
 		}
 
@@ -407,6 +315,7 @@ main(int argc, char **argv) {
 	const char *hash;
 	Display *dpy;
 	int s, nlocks, nscreens;
+	CARD16 standby, suspend, off;
 
 	ARGBEGIN {
 	case 'v':
@@ -448,32 +357,6 @@ main(int argc, char **argv) {
 	if (setuid(duid) < 0)
 		die("slock: setuid: %s\n", strerror(errno));
 
-	/* Load picture */
-        Imlib_Image buffer = imlib_load_image(background_image);
-	imlib_context_set_image(buffer);
-        int background_image_width = imlib_image_get_width();
-        int background_image_height = imlib_image_get_height();
-
-        /* Create an image to be rendered */
-	Screen *scr = ScreenOfDisplay(dpy, DefaultScreen(dpy));
-	image = imlib_create_image(scr->width, scr->height);
-        imlib_context_set_image(image);
-
-        /* Fill the image for every X monitor */
-        XRRMonitorInfo	*monitors;
-        int number_of_monitors;
-        monitors = XRRGetMonitors(dpy, RootWindow(dpy, XScreenNumberOfScreen(scr)), True, &number_of_monitors);
-
-        int i;
-        for (i = 0; i < number_of_monitors; i++) {
-            imlib_blend_image_onto_image(buffer, 0, 0, 0, background_image_width, background_image_height, monitors[i].x, monitors[i].y, monitors[i].width, monitors[i].height);
-        }
-
-        /* Clean up */
-        imlib_context_set_image(buffer);
-        imlib_free_image();
-        imlib_context_set_image(image);
-
 	/* check for Xrandr support */
 	rr.active = XRRQueryExtension(dpy, &rr.evbase, &rr.errbase);
 
@@ -493,6 +376,20 @@ 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()) {
@@ -510,12 +407,9 @@ main(int argc, char **argv) {
 	/* everything is now blank. Wait for the correct password */
 	readpw(dpy, &rr, locks, nscreens, hash);
 
-	for (nlocks = 0, s = 0; s < nscreens; s++) {
-		XFreePixmap(dpy, locks[s]->drawable);
-		XFreeGC(dpy, locks[s]->gc);
-	}
-
+	/* reset DPMS values to inital ones */
+	DPMSSetTimeouts(dpy, standby, suspend, off);
 	XSync(dpy, 0);
-	XCloseDisplay(dpy);
+
 	return 0;
 }

slock.c.orig

@@ -0,0 +1,395 @@
+/* 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 <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/keysym.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+#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 <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 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;
+}