Added a distro symbol (similar to what you'll find in DEs). Not yet functional.

config.def.h

@@ -5,6 +5,7 @@ static const unsigned int borderpx  = 1;        /* border pixel of windows */
 static const unsigned int snap      = 32;       /* snap pixel */
 static const int showbar            = 1;        /* 0 means no bar */
 static const int topbar             = 1;        /* 0 means bottom bar */
+static const char *distrosymbol     = "";
 static const char *fonts[]          = { "monospace:size=10" };
 static const char dmenufont[]       = "monospace:size=10";
 static const char col_gray1[]       = "#222222";
@@ -103,9 +104,7 @@ static Button buttons[] = {
 	{ ClkLtSymbol,          0,              Button1,        setlayout,      {0} },
 	{ ClkLtSymbol,          0,              Button3,        setlayout,      {.v = &layouts[2]} },
 	{ ClkWinTitle,          0,              Button2,        zoom,           {0} },
-	{ ClkStatusText,        0,              Button1,        sigdwmblocks,   {.i = 1} },
+	{ ClkStatusText,        0,              Button2,        spawn,          {.v = termcmd } },
-	{ ClkStatusText,        0,              Button2,        sigdwmblocks,   {.i = 2} },
-	{ ClkStatusText,        0,              Button3,        sigdwmblocks,   {.i = 3} },
 	{ ClkClientWin,         MODKEY,         Button1,        movemouse,      {0} },
 	{ ClkClientWin,         MODKEY,         Button2,        togglefloating, {0} },
 	{ ClkClientWin,         MODKEY,         Button3,        resizemouse,    {0} },

dwm.c

@@ -113,6 +113,7 @@ typedef struct {
 
 struct Monitor {
 	char ltsymbol[16];
+    char distrosymbol[16];
 	float mfact;
 	int nmaster;
 	int num;
@@ -156,7 +157,6 @@ static void clientmessage(XEvent *e);
 static void configure(Client *c);
 static void configurenotify(XEvent *e);
 static void configurerequest(XEvent *e);
-static void copyvalidchars(char *text, char *rawtext);
 static Monitor *createmon(void);
 static void destroynotify(XEvent *e);
 static void detach(Client *c);
@@ -170,7 +170,6 @@ static void focus(Client *c);
 static void focusin(XEvent *e);
 static void focusmon(const Arg *arg);
 static void focusstack(const Arg *arg);
-static int getdwmblockspid();
 static Atom getatomprop(Client *c, Atom prop);
 static int getrootptr(int *x, int *y);
 static long getstate(Window w);
@@ -208,7 +207,6 @@ static void setup(void);
 static void seturgent(Client *c, int urg);
 static void showhide(Client *c);
 static void sigchld(int unused);
-static void sigdwmblocks(const Arg *arg);
 static void spawn(const Arg *arg);
 static void tag(const Arg *arg);
 static void tagmon(const Arg *arg);
@@ -241,9 +239,6 @@ static void zoom(const Arg *arg);
 /* variables */
 static const char broken[] = "broken";
 static char stext[256];
-static char rawstext[256];
-static int dwmblockssig;
-pid_t dwmblockspid = 0;
 static int screen;
 static int sw, sh;           /* X display screen geometry width, height */
 static int bh, blw = 0;      /* bar geometry */
@@ -437,7 +432,8 @@ buttonpress(XEvent *e)
 		focus(NULL);
 	}
 	if (ev->window == selmon->barwin) {
-		i = x = 0;
+        x = TEXTW(m->distrosymbol);
+		i = 0;
 		do
 			x += TEXTW(tags[i]);
 		while (ev->x >= x && ++i < LENGTH(tags));
@@ -446,25 +442,9 @@ buttonpress(XEvent *e)
 			arg.ui = 1 << i;
 		} else if (ev->x < x + blw)
 			click = ClkLtSymbol;
-		else if (ev->x > (x = selmon->ww - TEXTW(stext) + lrpad)) {
+		else if (ev->x > selmon->ww - TEXTW(stext))
 			click = ClkStatusText;
-			char *text = rawstext;
+		else
-			int i = -1;
-			char ch;
-			dwmblockssig = 0;
-			while (text[++i]) {
-				if ((unsigned char)text[i] < ' ') {
-					ch = text[i];
-					text[i] = '\0';
-					x += TEXTW(text) - lrpad;
-					text[i] = ch;
-					text += i+1;
-					i = -1;
-					if (x >= ev->x) break;
-					dwmblockssig = ch;
-				}
-			}
-		} else
 			click = ClkWinTitle;
 	} else if ((c = wintoclient(ev->window))) {
 		focus(c);
@@ -650,19 +630,6 @@ configurerequest(XEvent *e)
 	XSync(dpy, False);
 }
 
-void
-copyvalidchars(char *text, char *rawtext)
-{
-	int i = -1, j = 0;
-
-	while(rawtext[++i]) {
-		if ((unsigned char)rawtext[i] >= ' ') {
-			text[j++] = rawtext[i];
-		}
-	}
-	text[j] = '\0';
-}
-
 Monitor *
 createmon(void)
 {
@@ -677,6 +644,7 @@ createmon(void)
 	m->lt[0] = &layouts[0];
 	m->lt[1] = &layouts[1 % LENGTH(layouts)];
 	strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
+    strncpy(m->distrosymbol, distrosymbol, sizeof m->distrosymbol);
 	return m;
 }
 
@@ -750,6 +718,9 @@ drawbar(Monitor *m)
 			urg |= c->tags;
 	}
 	x = 0;
+	w = blw = TEXTW(m->distrosymbol);
+	drw_setscheme(drw, scheme[SchemeNorm]);
+	x = drw_text(drw, x, 0, w, bh, lrpad / 2, m->distrosymbol, 0);
 	for (i = 0; i < LENGTH(tags); i++) {
 		w = TEXTW(tags[i]);
 		drw_setscheme(drw, scheme[m->tagset[m->seltags] & 1 << i ? SchemeSel : SchemeNorm]);
@@ -907,18 +878,6 @@ getatomprop(Client *c, Atom prop)
 	return atom;
 }
 
-int
-getdwmblockspid()
-{
-	char buf[16];
-	FILE *fp = popen("pidof -s dwmblocks", "r");
-	fgets(buf, sizeof(buf), fp);
-	pid_t pid = strtoul(buf, NULL, 10);
-	pclose(fp);
-	dwmblockspid = pid;
-	return pid != 0 ? 0 : -1;
-}
-
 int
 getrootptr(int *x, int *y)
 {
@@ -1684,23 +1643,6 @@ sigchld(int unused)
 	while (0 < waitpid(-1, NULL, WNOHANG));
 }
 
-void
-sigdwmblocks(const Arg *arg)
-{
-	union sigval sv;
-	sv.sival_int = (dwmblockssig << 8) | arg->i;
-	if (!dwmblockspid)
-		if (getdwmblockspid() == -1)
-			return;
-
-	if (sigqueue(dwmblockspid, SIGUSR1, sv) == -1) {
-		if (errno == ESRCH) {
-			if (!getdwmblockspid())
-				sigqueue(dwmblockspid, SIGUSR1, sv);
-		}
-	}
-}
-
 void
 spawn(const Arg *arg)
 {
@@ -2054,10 +1996,8 @@ updatesizehints(Client *c)
 void
 updatestatus(void)
 {
-	if (!gettextprop(root, XA_WM_NAME, rawstext, sizeof(rawstext)))
+	if (!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
 		strcpy(stext, "dwm-"VERSION);
-	else
-		copyvalidchars(stext, rawstext);
 	drawbar(selmon);
 }