initialHEADmaster

14 files changed, 1325 insertions, 0 deletions

diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..cb52dba
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,25 @@
+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>
+© 2016-2023 Hiltjo Posthuma <hiltjo@codemadness.org>
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..bab6a64
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,49 @@
+# slock - simple screen locker
+# See LICENSE file for copyright and license details.
+
+include config.mk
+
+SRC = slock.c ${COMPATSRC}
+OBJ = ${SRC:.c=.o}
+
+all: slock
+
+.c.o:
+	${CC} -c ${CFLAGS} $<
+
+${OBJ}: config.h config.mk arg.h util.h
+
+config.h:
+	cp config.def.h $@
+
+slock: ${OBJ}
+	${CC} -o $@ ${OBJ} ${LDFLAGS}
+
+clean:
+	rm -f slock ${OBJ} slock-${VERSION}.tar.gz config.h
+
+patch:
+	rm -f *.rej *.orig
+
+dist: clean
+	mkdir -p slock-${VERSION}
+	cp -R LICENSE Makefile README slock.1 config.mk \
+		${SRC} config.def.h arg.h util.h slock-${VERSION}
+	tar -cf slock-${VERSION}.tar slock-${VERSION}
+	gzip slock-${VERSION}.tar
+	rm -rf slock-${VERSION}
+
+install: all
+	mkdir -p ${DESTDIR}${PREFIX}/bin
+	cp -f slock ${DESTDIR}${PREFIX}/bin
+	chmod 755 ${DESTDIR}${PREFIX}/bin/slock
+	chmod u+s ${DESTDIR}${PREFIX}/bin/slock
+	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:
+	rm -f ${DESTDIR}${PREFIX}/bin/slock
+	rm -f ${DESTDIR}${MANPREFIX}/man1/slock.1
+
+.PHONY: all clean dist install uninstall
diff --git a/README b/README
new file mode 100644
index 0000000..dcacd01
--- /dev/null
+++ b/README
@@ -0,0 +1,24 @@
+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.
diff --git a/arg.h b/arg.h
new file mode 100644
index 0000000..0b23c53
--- /dev/null
+++ b/arg.h
@@ -0,0 +1,65 @@
+/*
+ * Copy me if you can.
+ * by 20h
+ */
+
+#ifndef ARG_H__
+#define ARG_H__
+
+extern char *argv0;
+
+/* use main(int argc, char *argv[]) */
+#define ARGBEGIN	for (argv0 = *argv, argv++, argc--;\
+					argv[0] && argv[0][0] == '-'\
+					&& argv[0][1];\
+					argc--, argv++) {\
+				char argc_;\
+				char **argv_;\
+				int brk_;\
+				if (argv[0][1] == '-' && argv[0][2] == '\0') {\
+					argv++;\
+					argc--;\
+					break;\
+				}\
+				for (brk_ = 0, argv[0]++, argv_ = argv;\
+						argv[0][0] && !brk_;\
+						argv[0]++) {\
+					if (argv_ != argv)\
+						break;\
+					argc_ = argv[0][0];\
+					switch (argc_)
+
+/* Handles obsolete -NUM syntax */
+#define ARGNUM				case '0':\
+					case '1':\
+					case '2':\
+					case '3':\
+					case '4':\
+					case '5':\
+					case '6':\
+					case '7':\
+					case '8':\
+					case '9'
+
+#define ARGEND			}\
+			}
+
+#define ARGC()		argc_
+
+#define ARGNUMF()	(brk_ = 1, estrtonum(argv[0], 0, INT_MAX))
+
+#define EARGF(x)	((argv[0][1] == '\0' && argv[1] == NULL)?\
+				((x), abort(), (char *)0) :\
+				(brk_ = 1, (argv[0][1] != '\0')?\
+					(&argv[0][1]) :\
+					(argc--, argv++, argv[0])))
+
+#define ARGF()		((argv[0][1] == '\0' && argv[1] == NULL)?\
+				(char *)0 :\
+				(brk_ = 1, (argv[0][1] != '\0')?\
+					(&argv[0][1]) :\
+					(argc--, argv++, argv[0])))
+
+#define LNGARG()	&argv[0][0]
+
+#endif
diff --git a/config.def.h b/config.def.h
new file mode 100644
index 0000000..5302b8c
--- /dev/null
+++ b/config.def.h
@@ -0,0 +1,52 @@
+#ifdef _laptopp
+#define laptop(...)   __VA_ARGS__
+#define komputer(...)
+#endif
+
+#ifdef _komputer
+#define komputer(...) __VA_ARGS__
+#define laptop(...)
+#endif
+
+/* user and group to drop privileges to */
+static const char *user  = "nobody";
+komputer(
+static const char *group = "nobody";
+)
+laptop(
+static const char *group = "nogroup";
+)
+
+static const char *colorname[NUMCOLS] = {
+	[INIT] =   "black",     /* after initialization */
+	[INPUT] =  "#005577",   /* during input */
+	[FAILED] = "#CC3333",   /* wrong password */
+};
+
+/* treat a cleared input like a wrong password (color) */
+static const int failonclear = 1;
+
+/* default message */
+static const char * message = "Suckless: Software that sucks less.";
+
+/* text color */
+static const char * text_color = "#ffffff";
+
+/* text size (must be a valid size) */
+// static const char * font_name = "-misc-fixed-medium-r-semicondensed--13-100-100-100-c-60-iso8859-1";
+// static const char * font_name = "-misc-fixed-medium-r-semicondensed--13-120-75-75-c-60-iso8859-1";
+static const char * font_name = "6x13";
+// static const char * font_name = "cursor";
+// static const char * font_name = "fixed";
+// static const char * font_name = "-misc-fixed-medium-r-semicondensed--0-0-75-75-c-0-iso8859-1";
+
+/*
+ * slock -f :
+ *
+ * -misc-fixed-medium-r-semicondensed--13-100-100-100-c-60-iso8859-1
+ * -misc-fixed-medium-r-semicondensed--13-120-75-75-c-60-iso8859-1
+ * 6x13
+ * cursor
+ * fixed
+ * -misc-fixed-medium-r-semicondensed--0-0-75-75-c-0-iso8859-1
+*/
diff --git a/config.mk b/config.mk
new file mode 100644
index 0000000..2e5ab88
--- /dev/null
+++ b/config.mk
@@ -0,0 +1,31 @@
+# slock version
+VERSION = 1.6
+
+include platform.mk
+
+# 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${X11LIB} -lX11 -lXext -lXrandr -lXinerama
+
+# flags
+CPPFLAGS = -DVERSION=\"${VERSION}\" -D_DEFAULT_SOURCE -DHAVE_SHADOW_H $(MYFLAGS)
+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 =
diff --git a/explicit_bzero.c b/explicit_bzero.c
new file mode 100644
index 0000000..3e33ca8
--- /dev/null
+++ b/explicit_bzero.c
@@ -0,0 +1,19 @@
+/*	$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);
+}
diff --git a/patches/slock-background-image-20220318-1c5a538.diff b/patches/slock-background-image-20220318-1c5a538.diff
new file mode 100644
index 0000000..2d4caf4
--- /dev/null
+++ b/patches/slock-background-image-20220318-1c5a538.diff
@@ -0,0 +1,149 @@
+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
+
diff --git a/patches/slock-colormessage-20250226-a34d8fb.diff b/patches/slock-colormessage-20250226-a34d8fb.diff
new file mode 100644
index 0000000..ef33f5e
--- /dev/null
+++ b/patches/slock-colormessage-20250226-a34d8fb.diff
@@ -0,0 +1,284 @@
+From 6a9553caad8c66f4a9f7adbe0f6501480af0573e Mon Sep 17 00:00:00 2001
+From: Max Schillinger <maxschillinger@web.de>
+Date: Wed, 26 Feb 2025 10:23:26 +0100
+Subject: [PATCH] Add a message command with 24 bit color support
+
+---
+ config.def.h |   9 +++
+ config.mk    |   2 +-
+ slock.1      |   7 +++
+ slock.c      | 154 +++++++++++++++++++++++++++++++++++++++++++++++++--
+ 4 files changed, 167 insertions(+), 5 deletions(-)
+
+diff --git a/config.def.h b/config.def.h
+index 9855e21..c2a0ab2 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -10,3 +10,12 @@ static const char *colorname[NUMCOLS] = {
+ 
+ /* treat a cleared input like a wrong password (color) */
+ static const int failonclear = 1;
++
++/* default message */
++static const char * message = "Suckless: Software that sucks less.";
++
++/* text color */
++static const char * text_color = "#ffffff";
++
++/* text size (must be a valid size) */
++static const char * font_name = "6x10";
+diff --git a/config.mk b/config.mk
+index 514c236..1421e70 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${X11LIB} -lX11 -lXext -lXrandr -lXinerama
+ 
+ # flags
+ CPPFLAGS = -DVERSION=\"${VERSION}\" -D_DEFAULT_SOURCE -DHAVE_SHADOW_H
+diff --git a/slock.1 b/slock.1
+index 40c15e1..85837ee 100644
+--- a/slock.1
++++ b/slock.1
+@@ -7,6 +7,8 @@
+ .Sh SYNOPSIS
+ .Nm
+ .Op Fl v
++.Op Fl f
++.Op Fl m Ar message
+ .Op Ar cmd Op Ar arg ...
+ .Sh DESCRIPTION
+ .Nm
+@@ -19,6 +21,11 @@ The options are as follows:
+ .Bl -tag -width Ds
+ .It Fl v
+ Print version information to stdout and exit.
++.It Fl f
++List all valid X fonts and exit.
++.It Fl m Ar message
++Overrides default slock lock message.
++.TP
+ .El
+ .Sh EXIT STATUS
+ .Ex -std
+diff --git a/slock.c b/slock.c
+index b2f14e3..cb450be 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/Xinerama.h>
+ #include <X11/keysym.h>
+ #include <X11/Xlib.h>
+ #include <X11/Xutil.h>
+@@ -24,6 +25,9 @@
+ 
+ char *argv0;
+ 
++/* global count to prevent repeated error messages */
++int count_error = 0;
++
+ enum {
+ 	INIT,
+ 	INPUT,
+@@ -83,6 +87,132 @@ dontkillme(void)
+ }
+ #endif
+ 
++static int
++readescapedint(const char *str, int *i) {
++	int n = 0;
++	if (str[*i])
++		++*i;
++	while(str[*i] && str[*i] != ';' && str[*i] != 'm') {
++		n = 10 * n + str[*i] - '0';
++		++*i;
++	}
++	return n;
++}
++
++static void
++writemessage(Display *dpy, Window win, int screen)
++{
++	int len, line_len, width, height, s_width, s_height, i, k, tab_size, r, g, b, escaped_int, curr_line_len;
++	XGCValues gr_values;
++	XFontStruct *fontinfo;
++	XColor color, dummy;
++	XineramaScreenInfo *xsi;
++	GC gc;
++	fontinfo = XLoadQueryFont(dpy, font_name);
++
++	if (fontinfo == NULL) {
++		if (count_error == 0) {
++			fprintf(stderr, "slock: Unable to load font \"%s\"\n", font_name);
++			fprintf(stderr, "slock: Try listing fonts with 'slock -f'\n");
++			count_error++;
++		}
++		return;
++	}
++
++	tab_size = 8 * XTextWidth(fontinfo, " ", 1);
++
++	XAllocNamedColor(dpy, DefaultColormap(dpy, screen),
++		 text_color, &color, &dummy);
++
++	gr_values.font = fontinfo->fid;
++	gr_values.foreground = color.pixel;
++	gc=XCreateGC(dpy,win,GCFont+GCForeground, &gr_values);
++
++	/*  To prevent "Uninitialized" warnings. */
++	xsi = NULL;
++
++	/*
++	 * Start formatting and drawing text
++	 */
++
++	len = strlen(message);
++
++	/* Max max line length (cut at '\n') */
++	line_len = curr_line_len = 0;
++	k = 0;
++	for (i = 0; i < len; i++) {
++		if (message[i] == '\n') {
++			curr_line_len = 0;
++			k++;
++		} else if (message[i] == 0x1b) {
++			while (i < len && message[i] != 'm') {
++				i++;
++			}
++			if (i == len)
++				die("slock: unclosed escape sequence\n");
++		} else {
++			curr_line_len += XTextWidth(fontinfo, message + i, 1);
++			if (curr_line_len > line_len)
++				line_len = curr_line_len;
++		}
++	}
++	/* If there is only one line */
++	if (line_len == 0)
++		line_len = len;
++
++	if (XineramaIsActive(dpy)) {
++		xsi = XineramaQueryScreens(dpy, &i);
++		s_width = xsi[0].width;
++		s_height = xsi[0].height;
++	} else {
++		s_width = DisplayWidth(dpy, screen);
++		s_height = DisplayHeight(dpy, screen);
++	}
++	height = s_height*3/7 - (k*20)/3;
++	width  = (s_width - line_len)/2;
++
++	line_len = 0;
++	/* print the text while parsing 24 bit color ANSI escape codes*/
++	for (i = k = 0; i < len; i++) {
++		switch (message[i]) {
++			case '\n':
++				line_len = 0;
++				while (message[i + 1] == '\t') {
++					line_len += tab_size;
++					i++;
++				}
++				k++;
++				break;
++			case 0x1b:
++				i++;
++				if (message[i] == '[') {
++					escaped_int = readescapedint(message, &i);
++					if (escaped_int == 39)
++						continue;
++					if (escaped_int != 38)
++						die("slock: unknown escape sequence%d\n", escaped_int);
++					if (readescapedint(message, &i) != 2)
++						die("slock: only 24 bit color supported\n");
++					r = readescapedint(message, &i) & 0xff;
++					g = readescapedint(message, &i) & 0xff;
++					b = readescapedint(message, &i) & 0xff;
++					XSetForeground(dpy, gc, r << 16 | g << 8 | b);
++				} else
++					die("slock: unknown escape sequence\n");
++				break;
++			default:
++				XDrawString(dpy, win, gc, width + line_len, height + 20 * k, message + i, 1);
++				line_len += XTextWidth(fontinfo, message + i, 1);
++		}
++	}
++
++	/* xsi should not be NULL anyway if Xinerama is active, but to be safe */
++	if (XineramaIsActive(dpy) && xsi != NULL)
++			XFree(xsi);
++}
++
++
++
+ static const char *
+ gethash(void)
+ {
+@@ -194,6 +324,7 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
+ 					                     locks[screen]->win,
+ 					                     locks[screen]->colors[color]);
+ 					XClearWindow(dpy, locks[screen]->win);
++					writemessage(dpy, locks[screen]->win, screen);
+ 				}
+ 				oldc = color;
+ 			}
+@@ -300,7 +431,7 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
+ static void
+ usage(void)
+ {
+-	die("usage: slock [-v] [cmd [arg ...]]\n");
++	die("usage: slock [-v] [-f] [-m message] [cmd [arg ...]]\n");
+ }
+ 
+ int
+@@ -313,12 +444,25 @@ main(int argc, char **argv) {
+ 	gid_t dgid;
+ 	const char *hash;
+ 	Display *dpy;
+-	int s, nlocks, nscreens;
++	int i, s, nlocks, nscreens;
++	int count_fonts;
++	char **font_names;
+ 
+ 	ARGBEGIN {
+ 	case 'v':
+ 		puts("slock-"VERSION);
+ 		return 0;
++	case 'm':
++		message = EARGF(usage());
++		break;
++	case 'f':
++		if (!(dpy = XOpenDisplay(NULL)))
++			die("slock: cannot open display\n");
++		font_names = XListFonts(dpy, "*", 10000 /* list 10000 fonts*/, &count_fonts);
++		for (i=0; i<count_fonts; i++) {
++			fprintf(stderr, "%s\n", *(font_names+i));
++		}
++		return 0;
+ 	default:
+ 		usage();
+ 	} ARGEND
+@@ -363,10 +507,12 @@ main(int argc, char **argv) {
+ 	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)
++		if ((locks[s] = lockscreen(dpy, &rr, s)) != NULL) {
++			writemessage(dpy, locks[s]->win, s);
+ 			nlocks++;
+-		else
++		} else {
+ 			break;
++		}
+ 	}
+ 	XSync(dpy, 0);
+ 
+-- 
+2.48.1
+
diff --git a/patches/slock-git-20161012-control-clear.diff b/patches/slock-git-20161012-control-clear.diff
new file mode 100644
index 0000000..b9634cd
--- /dev/null
+++ b/patches/slock-git-20161012-control-clear.diff
@@ -0,0 +1,27 @@
+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;
+ 				}
diff --git a/platform.mk b/platform.mk
new file mode 100644
index 0000000..9a097a8
--- /dev/null
+++ b/platform.mk
@@ -0,0 +1,4 @@
+# laptop (uncomment)
+# MYFLAGS = -D_laptop
+# komputer (uncomment)
+MYFLAGS = -D_komputer
diff --git a/slock.1 b/slock.1
new file mode 100644
index 0000000..85837ee
--- /dev/null
+++ b/slock.1
@@ -0,0 +1,52 @@
+.Dd October 6, 2023
+.Dt SLOCK 1
+.Os
+.Sh NAME
+.Nm slock
+.Nd simple X screen locker
+.Sh SYNOPSIS
+.Nm
+.Op Fl v
+.Op Fl f
+.Op Fl m Ar message
+.Op Ar cmd Op Ar arg ...
+.Sh DESCRIPTION
+.Nm
+is a simple X screen locker.
+If provided,
+.Ar cmd
+is executed after the screen has been locked.
+.Pp
+The options are as follows:
+.Bl -tag -width Ds
+.It Fl v
+Print version information to stdout and exit.
+.It Fl f
+List all valid X fonts and exit.
+.It Fl m Ar message
+Overrides default slock lock message.
+.TP
+.El
+.Sh EXIT STATUS
+.Ex -std
+.Sh EXAMPLES
+$
+.Nm
+/usr/sbin/s2ram
+.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
+Section "ServerFlags"
+	Option "DontVTSwitch" "True"
+	Option "DontZap"      "True"
+EndSection
+.Ed
+.Sh CUSTOMIZATION
+.Nm
+can be customized by creating a custom config.h from config.def.h and
+(re)compiling the source code.
+This keeps it fast, secure and simple.
diff --git a/slock.c b/slock.c
new file mode 100644
index 0000000..13ba185
--- /dev/null
+++ b/slock.c
@@ -0,0 +1,542 @@
+/* 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 <spawn.h>
+#include <sys/types.h>
+#include <X11/extensions/Xrandr.h>
+#include <X11/extensions/Xinerama.h>
+#include <X11/keysym.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+#include "arg.h"
+#include "util.h"
+
+char *argv0;
+
+/* global count to prevent repeated error messages */
+int count_error = 0;
+
+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 int
+readescapedint(const char *str, int *i) {
+	int n = 0;
+	if (str[*i])
+		++*i;
+	while(str[*i] && str[*i] != ';' && str[*i] != 'm') {
+		n = 10 * n + str[*i] - '0';
+		++*i;
+	}
+	return n;
+}
+
+static void
+writemessage(Display *dpy, Window win, int screen)
+{
+	int len, line_len, width, height, s_width, s_height, i, k, tab_size, r, g, b, escaped_int, curr_line_len;
+	XGCValues gr_values;
+	XFontStruct *fontinfo;
+	XColor color, dummy;
+	XineramaScreenInfo *xsi;
+	GC gc;
+	fontinfo = XLoadQueryFont(dpy, font_name);
+
+	if (fontinfo == NULL) {
+		if (count_error == 0) {
+			fprintf(stderr, "slock: Unable to load font \"%s\"\n", font_name);
+			fprintf(stderr, "slock: Try listing fonts with 'slock -f'\n");
+			count_error++;
+		}
+		return;
+	}
+
+	tab_size = 8 * XTextWidth(fontinfo, " ", 1);
+
+	XAllocNamedColor(dpy, DefaultColormap(dpy, screen),
+		 text_color, &color, &dummy);
+
+	gr_values.font = fontinfo->fid;
+	gr_values.foreground = color.pixel;
+	gc=XCreateGC(dpy,win,GCFont+GCForeground, &gr_values);
+
+	/*  To prevent "Uninitialized" warnings. */
+	xsi = NULL;
+
+	/*
+	 * Start formatting and drawing text
+	 */
+
+	len = strlen(message);
+
+	/* Max max line length (cut at '\n') */
+	line_len = curr_line_len = 0;
+	k = 0;
+	for (i = 0; i < len; i++) {
+		if (message[i] == '\n') {
+			curr_line_len = 0;
+			k++;
+		} else if (message[i] == 0x1b) {
+			while (i < len && message[i] != 'm') {
+				i++;
+			}
+			if (i == len)
+				die("slock: unclosed escape sequence\n");
+		} else {
+			curr_line_len += XTextWidth(fontinfo, message + i, 1);
+			if (curr_line_len > line_len)
+				line_len = curr_line_len;
+		}
+	}
+	/* If there is only one line */
+	if (line_len == 0)
+		line_len = len;
+
+	if (XineramaIsActive(dpy)) {
+		xsi = XineramaQueryScreens(dpy, &i);
+		s_width = xsi[0].width;
+		s_height = xsi[0].height;
+	} else {
+		s_width = DisplayWidth(dpy, screen);
+		s_height = DisplayHeight(dpy, screen);
+	}
+	height = s_height*3/7 - (k*20)/3;
+	width  = (s_width - line_len)/2;
+
+	line_len = 0;
+	/* print the text while parsing 24 bit color ANSI escape codes*/
+	for (i = k = 0; i < len; i++) {
+		switch (message[i]) {
+			case '\n':
+				line_len = 0;
+				while (message[i + 1] == '\t') {
+					line_len += tab_size;
+					i++;
+				}
+				k++;
+				break;
+			case 0x1b:
+				i++;
+				if (message[i] == '[') {
+					escaped_int = readescapedint(message, &i);
+					if (escaped_int == 39)
+						continue;
+					if (escaped_int != 38)
+						die("slock: unknown escape sequence%d\n", escaped_int);
+					if (readescapedint(message, &i) != 2)
+						die("slock: only 24 bit color supported\n");
+					r = readescapedint(message, &i) & 0xff;
+					g = readescapedint(message, &i) & 0xff;
+					b = readescapedint(message, &i) & 0xff;
+					XSetForeground(dpy, gc, r << 16 | g << 8 | b);
+				} else
+					die("slock: unknown escape sequence\n");
+				break;
+			default:
+				XDrawString(dpy, win, gc, width + line_len, height + 20 * k, message + i, 1);
+				line_len += XTextWidth(fontinfo, message + i, 1);
+		}
+	}
+
+	/* xsi should not be NULL anyway if Xinerama is active, but to be safe */
+	if (XineramaIsActive(dpy) && xsi != NULL)
+			XFree(xsi);
+}
+
+
+
+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;
+				} else if (buf[0] == '\025') { /* ctrl-u clears input */
+					explicit_bzero(&passwd, sizeof(passwd));
+					len = 0;
+				}
+				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);
+					writemessage(dpy, locks[screen]->win, screen);
+				}
+				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] [-f] [-m message] [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 i, s, nlocks, nscreens;
+	int count_fonts;
+	char **font_names;
+
+	ARGBEGIN {
+	case 'v':
+		puts("slock-"VERSION);
+		return 0;
+	case 'm':
+		message = EARGF(usage());
+		break;
+	case 'f':
+		if (!(dpy = XOpenDisplay(NULL)))
+			die("slock: cannot open display\n");
+		font_names = XListFonts(dpy, "*", 10000 /* list 10000 fonts*/, &count_fonts);
+		for (i=0; i<count_fonts; i++) {
+			fprintf(stderr, "%s\n", *(font_names+i));
+		}
+		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) {
+			writemessage(dpy, locks[s]->win, s);
+			nlocks++;
+		} else {
+			break;
+		}
+	}
+	XSync(dpy, 0);
+
+	/* did we manage to lock everything? */
+	if (nlocks != nscreens)
+		return 1;
+
+	/* run post-lock command */
+	if (argc > 0) {
+		pid_t pid;
+		extern char **environ;
+		int err = posix_spawnp(&pid, argv[0], NULL, NULL, argv, environ);
+		if (err) {
+			die("slock: failed to execute post-lock command: %s: %s\n",
+			    argv[0], strerror(err));
+		}
+	}
+
+	/* everything is now blank. Wait for the correct password */
+	readpw(dpy, &rr, locks, nscreens, hash);
+
+	return 0;
+}
diff --git a/util.h b/util.h
new file mode 100644
index 0000000..6f748b8
--- /dev/null
+++ b/util.h
@@ -0,0 +1,2 @@
+#undef explicit_bzero
+void explicit_bzero(void *, size_t);