kill -HUP pid to restart, also mod+R

config.h

@@ -133,7 +133,7 @@ static Key keys[] = {
 	{ MODKEY,			XK_e,		spawn,		SHCMD("st -e neomutt ; pkill -RTMIN+12 dwmblocks; rmdir ~/.abook") },
 	{ MODKEY|ShiftMask,		XK_e,		spawn,		SHCMD("tutorialvids") },
 	{ MODKEY,			XK_r,		spawn,		SHCMD("st -e lf") },
-	/* { MODKEY|ShiftMask,		XK_r,		spawn,		SHCMD("") }, */
+	{ MODKEY|ShiftMask,		XK_r,		quit,		{1} },
 	{ MODKEY,			XK_t,		setlayout,	{.v = &layouts[0]} },
 	/* { MODKEY|ShiftMask,		XK_t,		spawn,		SHCMD("") }, */
 	{ MODKEY,			XK_y,		setlayout,	{.v = &layouts[4]} },

dwm.1

@@ -137,6 +137,9 @@ Add/remove all windows with nth tag to/from the view.
 .TP
 .B Super\-Shift\-q
 Quit dwm.
+.TP
+.B Mod1\-Control\-Shift\-q
+Restart dwm.
 .SS Mouse commands
 .TP
 .B Super\-Left click
@@ -150,6 +153,13 @@ Resize focused window while dragging. Tiled windows will be toggled to the float
 .SH CUSTOMIZATION
 dwm is customized by creating a custom config.h and (re)compiling the source
 code. This keeps it fast, secure and simple.
+.SH SIGNALS
+.TP
+.B SIGHUP - 1
+Restart the dwm process.
+.TP
+.B SIGTERM - 15
+Cleanly terminate the dwm process.
 .SH SEE ALSO
 .BR dmenu (1),
 .BR st (1)

dwm.c

@@ -249,6 +249,8 @@ static void setup(void);
 static void seturgent(Client *c, int urg);
 static void showhide(Client *c);
 static void sigchld(int unused);
+static void sighup(int unused);
+static void sigterm(int unused);
 static void spawn(const Arg *arg);
 static int stackpos(const Arg *arg);
 static void tag(const Arg *arg);
@@ -314,6 +316,7 @@ static void (*handler[LASTEvent]) (XEvent *) = {
 	[UnmapNotify] = unmapnotify
 };
 static Atom wmatom[WMLast], netatom[NetLast];
+static int restart = 0;
 static int running = 1;
 static Cur *cursor[CurLast];
 static Clr **scheme;
@@ -1393,6 +1396,7 @@ propertynotify(XEvent *e)
 void
 quit(const Arg *arg)
 {
+	if(arg->i) restart = 1;
 	running = 0;
 }
 
@@ -1822,6 +1826,9 @@ setup(void)
 	/* clean up any zombies immediately */
 	sigchld(0);
 
+	signal(SIGHUP, sighup);
+	signal(SIGTERM, sigterm);
+
 	/* init screen */
 	screen = DefaultScreen(dpy);
 	sw = DisplayWidth(dpy, screen);
@@ -1926,6 +1933,20 @@ sigchld(int unused)
 	while (0 < waitpid(-1, NULL, WNOHANG));
 }
 
+void
+sighup(int unused)
+{
+	Arg a = {.i = 1};
+	quit(&a);
+}
+
+void
+sigterm(int unused)
+{
+	Arg a = {.i = 0};
+	quit(&a);
+}
+
 void
 spawn(const Arg *arg)
 {
@@ -2492,6 +2513,7 @@ main(int argc, char *argv[])
 	scan();
 	runAutostart();
 	run();
+	if(restart) execvp(argv[0], argv);
 	cleanup();
 	XCloseDisplay(dpy);
 	return EXIT_SUCCESS;