Added capscolor, control clear, dpms, mediakeys, message, pam auth, quickcancel patches

.gitignore

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

README.md

@@ -0,0 +1,54 @@
+Similar to [dwm-flexipatch](https://github.com/bakkeby/dwm-flexipatch) this slock 1.4 project has a different take on patching. It uses preprocessor directives to decide whether or not to include a patch during build time. Essentially this means that this build, for better or worse, contains both the patched _and_ the original code. The aim being that you can select which patches to include and the build will contain that code and nothing more.
+
+For example to include the `capscolor` patch then you would only need to flip this setting from 0 to 1 in [patches.h](https://github.com/bakkeby/slock-flexipatch/blob/master/patches.h):
+```c
+#define CAPSCOLOR_PATCH 1
+```
+
+Once you have found out what works for you and what doesn't then you should be in a better position to choose patches should you want to start patching from scratch.
+
+Alternatively if you have found the patches you want, but don't want the rest of the flexipatch entanglement on your plate then you may want to have a look at [flexipatch-finalizer](https://github.com/bakkeby/flexipatch-finalizer); a custom pre-processor tool that removes all the unused flexipatch code leaving you with a build that contains the patches you selected.
+
+Refer to [https://tools.suckless.org/slock/](https://tools.suckless.org/slock/) for details on the slock tool, how to install it and how it works.
+
+---
+
+### Changelog:
+
+2019-10-17 - Added capscolor, control clear, dpms, mediakeys, message, pam auth, quickcancel patches
+
+2019-10-16 - Introduced [flexipatch-finalizer](https://github.com/bakkeby/flexipatch-finalizer)
+
+### Patches included:
+
+   - [capscolor](https://tools.suckless.org/slock/patches/capscolor/)
+      - adds an additional color to indicate the state of Caps Lock
+
+   - [control-clear](https://tools.suckless.org/slock/patches/control-clear/)
+      - with this patch slock will no longer change to the failure color if a control key is pressed while the buffer is empty
+      - this may be useful if, for example, you wake your monitor up by pressing a control key and don't want to spoil the detection of failed unlocking attempts
+
+   - [dpms](https://tools.suckless.org/slock/patches/dpms/)
+      - interacts with the Display Power Signaling and automatically shuts down the monitor after a configurable amount of seconds
+      - the monitor will automatically be activated by pressing a key or moving the mouse and the password can be entered then
+
+   - [mediakeys](https://tools.suckless.org/slock/patches/mediakeys/)
+      - allows media keys to be used while the screen is locked, e.g. adjust volume or skip to the next song without having to unlock the screen first
+
+   - [message](https://tools.suckless.org/slock/patches/message/)
+      - this patch lets you add a custom message to your lock screen
+
+   - [pam-auth](https://tools.suckless.org/slock/patches/pam_auth/)
+      - replaces shadow support with PAM authentication support
+
+   - [quickcancel](https://tools.suckless.org/slock/patches/quickcancel/)
+      - cancel slock by moving the mouse within a certain time-period after slock started
+      - the time-period can be defined in seconds with the setting timetocancel in the config.h
+      - this can be useful if you forgot to disable xautolock during an activity that requires no input (e.g. reading text, watching video, etc.)
+
+   - [terminalkeys](https://tools.suckless.org/slock/patches/terminalkeys/)
+      - adds key commands that are commonly used in terminal applications (in particular the login prompt)
+
+   - [unlockscreen](https://tools.suckless.org/slock/patches/unlock_screen/)
+      - this patch keeps the screen unlocked, but keeps the input locked
+      - that is, the screen is not affected by slock, but users will not be able to interact with the X session unless they enter the correct password

config.def.h

@@ -6,7 +6,44 @@ static const char *colorname[NUMCOLS] = {
 	[INIT] =   "black",     /* after initialization */
 	[INPUT] =  "#005577",   /* during input */
 	[FAILED] = "#CC3333",   /* wrong password */
+	#if CAPSCOLOR_PATCH
+	[CAPS] =   "red",       /* CapsLock on */
+	#endif // CAPSCOLOR_PATCH
+	#if PAMAUTH_PATCH
+	[PAM] =    "#9400D3",   /* waiting for PAM */
+	#endif // CAPSCOLOR_PATCH
 };
 
 /* treat a cleared input like a wrong password (color) */
 static const int failonclear = 1;
+
+#if CONTROLCLEAR_PATCH
+/* allow control key to trigger fail on clear */
+static const int controlkeyclear = 0;
+#endif // CONTROLCLEAR_PATCH
+
+#if DPMS_PATCH
+/* time in seconds before the monitor shuts down */
+static const int monitortime = 5;
+#endif // DPMS_PATCH
+
+#if MESSAGE_PATCH
+/* 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";
+#endif // MESSAGE_PATCH
+
+#if PAMAUTH_PATCH
+/* PAM service that's used for authentication */
+static const char* pam_service = "login";
+#endif // PAMAUTH_PATCH
+
+#if QUICKCANCEL_PATCH
+/* time in seconds to cancel lock with mouse movement */
+static const int timetocancel = 4;
+#endif // QUICKCANCEL_PATCH

config.mk

@@ -10,9 +10,15 @@ MANPREFIX = ${PREFIX}/share/man
 X11INC = /usr/X11R6/include
 X11LIB = /usr/X11R6/lib
 
+# Uncomment for message patch / MESSAGE_PATCH
+#XINERAMA=-lXinerama
+
+# Uncomment for pam auth patch / PAMAUTH_PATCH
+#PAM=-lpam
+
 # 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 ${XINERAMA} ${PAM}
 
 # flags
 CPPFLAGS = -DVERSION=\"${VERSION}\" -D_DEFAULT_SOURCE -DHAVE_SHADOW_H

patch/dpms.c

@@ -0,0 +1,9 @@
+#include <X11/extensions/dpms.h>
+
+static void
+monitorreset(Display* dpy, CARD16 standby, CARD16 suspend, CARD16 off)
+{
+	DPMSSetTimeouts(dpy, standby, suspend, off);
+	DPMSForceLevel(dpy, DPMSModeOn);
+	XFlush(dpy);
+}

patch/include.c

@@ -0,0 +1,12 @@
+/* Patches */
+#if DPMS_PATCH
+#include "dpms.c"
+#endif
+
+#if MESSAGE_PATCH
+#include "message.c"
+#endif
+
+#if PAMAUTH_PATCH
+#include "pamauth.c"
+#endif

patch/include.h

@@ -0,0 +1,4 @@
+/* Patches */
+#if PAMAUTH_PATCH
+#include "pamauth.h"
+#endif

patch/message.c

@@ -0,0 +1,94 @@
+#include <X11/extensions/Xinerama.h>
+
+/* global count to prevent repeated error messages */
+int count_error = 0;
+
+static void
+writemessage(Display *dpy, Window win, int screen)
+{
+	int len, line_len, width, height, s_width, s_height, i, j, k, tab_replace, tab_size;
+	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 = 0;
+	k = 0;
+	for (i = j = 0; i < len; i++) {
+		if (message[i] == '\n') {
+			if (i - j > line_len)
+				line_len = i - j;
+			k++;
+			i++;
+			j = i;
+		}
+	}
+	/* 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 - XTextWidth(fontinfo, message, line_len))/2;
+
+	/* Look for '\n' and print the text between them. */
+	for (i = j = k = 0; i <= len; i++) {
+		/* i == len is the special case for the last line */
+		if (i == len || message[i] == '\n') {
+			tab_replace = 0;
+			while (message[j] == '\t' && j < i) {
+				tab_replace++;
+				j++;
+			}
+
+			XDrawString(dpy, win, gc, width + tab_size*tab_replace, height + 20*k, message + j, i - j);
+			while (i < len && message[i] == '\n') {
+				i++;
+				j = i;
+				k++;
+			}
+		}
+	}
+
+	/* xsi should not be NULL anyway if Xinerama is active, but to be safe */
+	if (XineramaIsActive(dpy) && xsi != NULL)
+			XFree(xsi);
+}

patch/pamauth.c

@@ -0,0 +1,27 @@
+char passwd[256];
+
+static int
+pam_conv(int num_msg, const struct pam_message **msg,
+		struct pam_response **resp, void *appdata_ptr)
+{
+	int retval = PAM_CONV_ERR;
+	for (int i=0; i<num_msg; i++) {
+		if (msg[i]->msg_style == PAM_PROMPT_ECHO_OFF &&
+				strncmp(msg[i]->msg, "Password: ", 10) == 0) {
+			struct pam_response *resp_msg = malloc(sizeof(struct pam_response));
+			if (!resp_msg)
+				die("malloc failed\n");
+			char *password = malloc(strlen(passwd) + 1);
+			if (!password)
+				die("malloc failed\n");
+			memset(password, 0, strlen(passwd) + 1);
+			strcpy(password, passwd);
+			resp_msg->resp_retcode = 0;
+			resp_msg->resp = password;
+			resp[i] = resp_msg;
+			retval = PAM_SUCCESS;
+		}
+	}
+	return retval;
+}
+

patch/pamauth.h

@@ -0,0 +1,5 @@
+#include <security/pam_appl.h>
+#include <security/pam_misc.h>
+
+static int pam_conv(int num_msg, const struct pam_message **msg, struct pam_response **resp, void *appdata_ptr);
+struct pam_conv pamc = {pam_conv, NULL};

patches.h

@@ -0,0 +1,75 @@
+/*
+ * This file contains patch control flags.
+ *
+ * In principle you should be able to mix and match any patches
+ * you may want. In cases where patches are logically incompatible
+ * one patch may take precedence over the other as noted in the
+ * relevant descriptions.
+ */
+
+/* Patches */
+
+/* This patch introduces an additional color to indicate the state of Caps Lock.
+ * https://tools.suckless.org/slock/patches/capscolor/
+ */
+#define CAPSCOLOR_PATCH 0
+
+/* Adds an additional configuration parameter, controlkeyclear. When set to 1, slock will no
+ * longer change to the failure color if a control key is pressed while the buffer is empty.
+ * This may be useful if, for example, you wake your monitor up by pressing a control key
+ * and don't want to spoil the detection of failed unlocking attempts.
+ * https://tools.suckless.org/slock/patches/control-clear/
+ */
+#define CONTROLCLEAR_PATCH 0
+
+/* This patch interacts with the Display Power Signaling and automatically shuts down
+* the monitor after a configurable amount of seconds.
+* The monitor will automatically be activated by pressing a key or moving the mouse
+* and the password can be entered then.
+* https://tools.suckless.org/slock/patches/dpms/
+*/
+#define DPMS_PATCH 0
+
+/* This patch allows media keys to be used while the screen is locked. Allows for volume
+ * to be adjusted or to skip to the next song without having to unlock the screen first.
+ * https://tools.suckless.org/slock/patches/mediakeys/
+ */
+#define MEDIAKEYS_PATCH 0
+
+/* This patch lets you add a message to your lock screen. You can place a default message
+ * in config.h and you can also pass a message with the -m command line option.
+ * If you enable this then you also need to add the -lXinerama library to the LIBS
+ * configuration in config.mk. Look for and uncomment the XINERAMA placeholder.
+ * https://tools.suckless.org/slock/patches/message/
+ */
+#define MESSAGE_PATCH 0
+
+/* Replaces shadow support with PAM authentication support.
+ * Change variable pam_service in config.def.h to the corresponding PAM service.
+ * The default configuration is for ArchLinux's login service.
+ * If you enable this then you also need to add the -lpam library to the LIBS configuration
+ * in config.mk. Look for and uncomment the PAM placeholder.
+ * https://tools.suckless.org/slock/patches/pam_auth/
+ */
+#define PAMAUTH_PATCH 0
+
+/* Cancel slock by moving the mouse within a certain time-period after slock started.
+ * The time-period can be defined in seconds with the setting timetocancel in the config.h.
+ * This can be useful if you forgot to disable xautolock during an activity that requires
+ * no input (e.g. reading text, watching video, etc.).
+ * https://tools.suckless.org/slock/patches/quickcancel/
+ */
+#define QUICKCANCEL_PATCH 0
+
+/* Adds key commands that are commonly used in terminal applications (in particular the
+ * login prompt) to slock.
+ * https://tools.suckless.org/slock/patches/terminalkeys/
+ */
+#define TERMINALKEYS_PATCH 0
+
+/* This patch keeps the screen unlocked but keeps the input locked. That is, the screen
+ * is not affected by slock, but users will not be able to interact with the X session
+ * unless they enter the correct password.
+ * https://tools.suckless.org/slock/patches/unlock_screen/
+ */
+#define UNLOCKSCREEN_PATCH 0

slock.c

@@ -19,15 +19,36 @@
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
 
+#include "patches.h"
+#if CAPSCOLOR_PATCH
+#include <X11/XKBlib.h>
+#endif // CAPSCOLOR_PATCH
+#if MEDIAKEYS_PATCH
+#include <X11/XF86keysym.h>
+#endif // MEDIAKEYS_PATCH
+#if QUICKCANCEL_PATCH
+#include <time.h>
+#endif // QUICKCANCEL_PATCH
+
 #include "arg.h"
 #include "util.h"
 
 char *argv0;
 
+#if QUICKCANCEL_PATCH
+static time_t locktime;
+#endif // QUICKCANCEL_PATCH
+
 enum {
 	INIT,
 	INPUT,
 	FAILED,
+	#if CAPSCOLOR_PATCH
+	CAPS,
+	#endif // CAPSCOLOR_PATCH
+	#if PAMAUTH_PATCH
+	PAM,
+	#endif // PAMAUTH_PATCH
 	NUMCOLS
 };
 
@@ -44,6 +65,7 @@ struct xrandr {
 	int errbase;
 };
 
+#include "patch/include.h"
 #include "config.h"
 
 static void
@@ -57,6 +79,8 @@ die(const char *errstr, ...)
 	exit(1);
 }
 
+#include "patch/include.c"
+
 #ifdef __linux__
 #include <fcntl.h>
 #include <linux/oom.h>
@@ -121,6 +145,10 @@ gethash(void)
 	}
 #endif /* HAVE_SHADOW_H */
 
+	#if PAMAUTH_PATCH
+	/* pam, store user name */
+	hash = pw->pw_name;
+	#endif // PAMAUTH_PATCH
 	return hash;
 }
 
@@ -129,18 +157,39 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
        const char *hash)
 {
 	XRRScreenChangeNotifyEvent *rre;
+	#if PAMAUTH_PATCH
+	char buf[32];
+	int retval;
+	pam_handle_t *pamh;
+	#else
 	char buf[32], passwd[256], *inputhash;
+	#endif // PAMAUTH_PATCH
 	int num, screen, running, failure, oldc;
 	unsigned int len, color;
+	#if CAPSCOLOR_PATCH
+	int caps;
+	unsigned int indicators;
+	#endif // CAPSCOLOR_PATCH
 	KeySym ksym;
 	XEvent ev;
 
 	len = 0;
+	#if CAPSCOLOR_PATCH
+	caps = 0;
+	#endif // CAPSCOLOR_PATCH
 	running = 1;
 	failure = 0;
 	oldc = INIT;
 
+	#if CAPSCOLOR_PATCH
+	if (!XkbGetIndicatorState(dpy, XkbUseCoreKbd, &indicators))
+		caps = indicators & 1;
+
+	#endif // CAPSCOLOR_PATCH
 	while (running && !XNextEvent(dpy, &ev)) {
+		#if QUICKCANCEL_PATCH
+		running = !((time(NULL) - locktime < timetocancel) && (ev.type == MotionNotify));
+		#endif // QUICKCANCEL_PATCH
 		if (ev.type == KeyPress) {
 			explicit_bzero(&buf, sizeof(buf));
 			num = XLookupString(&ev.xkey, buf, sizeof(buf), &ksym, 0);
@@ -156,14 +205,55 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
 			    IsPFKey(ksym) ||
 			    IsPrivateKeypadKey(ksym))
 				continue;
+			#if TERMINALKEYS_PATCH
+			if (ev.xkey.state & ControlMask) {
+				switch (ksym) {
+				case XK_u:
+					ksym = XK_Escape;
+					break;
+				case XK_m:
+					ksym = XK_Return;
+					break;
+				case XK_j:
+					ksym = XK_Return;
+					break;
+				case XK_h:
+					ksym = XK_BackSpace;
+					break;
+				}
+			}
+			#endif // TERMINALKEYS_PATCH
 			switch (ksym) {
 			case XK_Return:
 				passwd[len] = '\0';
 				errno = 0;
+				#if PAMAUTH_PATCH
+				retval = pam_start(pam_service, hash, &pamc, &pamh);
+				color = PAM;
+				for (screen = 0; screen < nscreens; screen++) {
+					XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[color]);
+					XClearWindow(dpy, locks[screen]->win);
+					XRaiseWindow(dpy, locks[screen]->win);
+				}
+				XSync(dpy, False);
+
+				if (retval == PAM_SUCCESS)
+					retval = pam_authenticate(pamh, 0);
+				if (retval == PAM_SUCCESS)
+					retval = pam_acct_mgmt(pamh, 0);
+
+				running = 1;
+				if (retval == PAM_SUCCESS)
+					running = 0;
+				else
+					fprintf(stderr, "slock: %s\n", pam_strerror(pamh, retval));
+				pam_end(pamh, retval);
+				#else
 				if (!(inputhash = crypt(passwd, hash)))
 					fprintf(stderr, "slock: crypt: %s\n", strerror(errno));
 				else
 					running = !!strcmp(inputhash, hash);
+				#endif // PAMAUTH_PATCH
 				if (running) {
 					XBell(dpy, 100);
 					failure = 1;
@@ -179,21 +269,51 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
 				if (len)
 					passwd[--len] = '\0';
 				break;
+			#if CAPSCOLOR_PATCH
+			case XK_Caps_Lock:
+				caps = !caps;
+				break;
+			#endif // CAPSCOLOR_PATCH
+			#if MEDIAKEYS_PATCH
+			case XF86XK_AudioLowerVolume:
+			case XF86XK_AudioMute:
+			case XF86XK_AudioRaiseVolume:
+			case XF86XK_AudioPlay:
+			case XF86XK_AudioStop:
+			case XF86XK_AudioPrev:
+			case XF86XK_AudioNext:
+				XSendEvent(dpy, DefaultRootWindow(dpy), True, KeyPressMask, &ev);
+				break;
+			#endif // MEDIAKEYS_PATCH
 			default:
+				#if CONTROLCLEAR_PATCH
+				if (controlkeyclear && iscntrl((int)buf[0]))
+					continue;
+				if (num && (len + num < sizeof(passwd)))
+				#else
 				if (num && !iscntrl((int)buf[0]) &&
-				    (len + num < sizeof(passwd))) {
+				    (len + num < sizeof(passwd)))
+				#endif // CONTROLCLEAR_PATCH
+				{
 					memcpy(passwd + len, buf, num);
 					len += num;
 				}
 				break;
 			}
+			#if CAPSCOLOR_PATCH
+			color = len ? (caps ? CAPS : INPUT) : (failure || failonclear ? FAILED : INIT);
+			#else
 			color = len ? INPUT : ((failure || failonclear) ? FAILED : INIT);
+			#endif // CAPSCOLOR_PATCH
 			if (running && oldc != color) {
 				for (screen = 0; screen < nscreens; screen++) {
 					XSetWindowBackground(dpy,
 					                     locks[screen]->win,
 					                     locks[screen]->colors[color]);
 					XClearWindow(dpy, locks[screen]->win);
+					#if MESSAGE_PATCH
+					writemessage(dpy, locks[screen]->win, screen);
+					#endif // MESSAGE_PATCH
 				}
 				oldc = color;
 			}
@@ -262,7 +382,13 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
 			ptgrab = XGrabPointer(dpy, lock->root, False,
 			                      ButtonPressMask | ButtonReleaseMask |
 			                      PointerMotionMask, GrabModeAsync,
-			                      GrabModeAsync, None, invisible, CurrentTime);
+			                      GrabModeAsync, None,
+			                      #if UNLOCKSCREEN_PATCH
+			                      None,
+			                      #else
+			                      invisible,
+			                      #endif // UNLOCKSCREEN_PATCH
+			                      CurrentTime);
 		}
 		if (kbgrab != GrabSuccess) {
 			kbgrab = XGrabKeyboard(dpy, lock->root, True,
@@ -271,11 +397,16 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
 
 		/* input is grabbed: we can lock the screen */
 		if (ptgrab == GrabSuccess && kbgrab == GrabSuccess) {
+			#if !UNLOCKSCREEN_PATCH
 			XMapRaised(dpy, lock->win);
+			#endif // UNLOCKSCREEN_PATCH
 			if (rr->active)
 				XRRSelectInput(dpy, lock->win, RRScreenChangeNotifyMask);
 
 			XSelectInput(dpy, lock->root, SubstructureNotifyMask);
+			#if QUICKCANCEL_PATCH
+			locktime = time(NULL);
+			#endif // QUICKCANCEL_PATCH
 			return lock;
 		}
 
@@ -300,7 +431,11 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
 static void
 usage(void)
 {
+	#if MESSAGE_PATCH
+	die("usage: slock [-v] [-f] [-m message] [cmd [arg ...]]\n");
+	#else
 	die("usage: slock [-v] [cmd [arg ...]]\n");
+	#endif // MESSAGE_PATCH
 }
 
 int
@@ -314,11 +449,30 @@ main(int argc, char **argv) {
 	const char *hash;
 	Display *dpy;
 	int s, nlocks, nscreens;
-
+	#if DPMS_PATCH
+	CARD16 standby, suspend, off;
+	#endif // DPMS_PATCH
+	#if MESSAGE_PATCH
+	int i, count_fonts;
+	char **font_names;
+	#endif // MESSAGE_PATCH
 	ARGBEGIN {
 	case 'v':
 		fprintf(stderr, "slock-"VERSION"\n");
 		return 0;
+	#if MESSAGE_PATCH
+	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;
+	#endif // MESSAGE_PATCH
 	default:
 		usage();
 	} ARGEND
@@ -339,10 +493,15 @@ main(int argc, char **argv) {
 	dontkillme();
 #endif
 
+	#if PAMAUTH_PATCH
+	/* the contents of hash are used to transport the current user name */
+	#endif // PAMAUTH_PATCH
 	hash = gethash();
 	errno = 0;
+	#if !PAMAUTH_PATCH
 	if (!crypt("", hash))
 		die("slock: crypt: %s\n", strerror(errno));
+	#endif // PAMAUTH_PATCH
 
 	if (!(dpy = XOpenDisplay(NULL)))
 		die("slock: cannot open display\n");
@@ -363,10 +522,14 @@ 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) {
+			#if MESSAGE_PATCH
+			writemessage(dpy, locks[s]->win, s);
+			#endif // MESSAGE_PATCH
 			nlocks++;
-		else
+		} else {
 			break;
+		}
 	}
 	XSync(dpy, 0);
 
@@ -374,12 +537,31 @@ main(int argc, char **argv) {
 	if (nlocks != nscreens)
 		return 1;
 
+	#if DPMS_PATCH
+	/* 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)
+		/* set values if there arent some */
+		standby = suspend = off = 300;
+
+	DPMSSetTimeouts(dpy, monitortime, monitortime, monitortime);
+	XFlush(dpy);
+	#endif // DPMS_PATCH
+
 	/* run post-lock command */
 	if (argc > 0) {
 		switch (fork()) {
 		case -1:
 			die("slock: fork failed: %s\n", strerror(errno));
 		case 0:
+			#if DPMS_PATCH
+			monitorreset(dpy, standby, suspend, off);
+			#endif // DPMS_PATCH
 			if (close(ConnectionNumber(dpy)) < 0)
 				die("slock: close: %s\n", strerror(errno));
 			execvp(argv[0], argv);
@@ -390,6 +572,10 @@ main(int argc, char **argv) {
 
 	/* everything is now blank. Wait for the correct password */
 	readpw(dpy, &rr, locks, nscreens, hash);
+	#if DPMS_PATCH
+	/* reset DPMS values to inital ones */
+	monitorreset(dpy, standby, suspend, off);
+	#endif // DPMS_PATCH
 
 	return 0;
 }