Apply selfrestart patch (r1615)

config.def.h

@@ -62,6 +62,8 @@ static char dmenumon[2] = "0"; /* component of dmenucmd, manipulated in spawn()
 static const char *dmenucmd[] = { "dmenu_run", "-m", dmenumon, "-fn", dmenufont, "-nb", col_gray1, "-nf", col_gray3, "-sb", col_cyan, "-sf", col_gray4, NULL };
 static const char *termcmd[]  = { "st", NULL };
 
+#include "selfrestart.c"
+
 static Key keys[] = {
 	/* modifier                     key        function        argument */
 	{ MODKEY,                       XK_p,      spawn,          {.v = dmenucmd } },
@@ -73,6 +75,7 @@ static Key keys[] = {
 	{ MODKEY,                       XK_d,      incnmaster,     {.i = -1 } },
 	{ MODKEY,                       XK_h,      setmfact,       {.f = -0.05} },
 	{ MODKEY,                       XK_l,      setmfact,       {.f = +0.05} },
+	{ MODKEY,                       XK_r,      reorganizetags, {0} },
 	{ MODKEY,                       XK_Return, zoom,           {0} },
 	{ MODKEY,                       XK_Tab,    view,           {0} },
 	{ MODKEY|ShiftMask,             XK_c,      killclient,     {0} },
@@ -99,6 +102,7 @@ static Key keys[] = {
 	TAGKEYS(                        XK_7,                      6)
 	TAGKEYS(                        XK_8,                      7)
 	TAGKEYS(                        XK_9,                      8)
+	{ MODKEY|ShiftMask,             XK_r,      self_restart,   {0} },
 	{ MODKEY|ShiftMask,             XK_q,      quit,           {0} },
 };
 

dwm.c

@@ -200,6 +200,7 @@ static void pop(Client *);
 static void propertynotify(XEvent *e);
 static void quit(const Arg *arg);
 static Monitor *recttomon(int x, int y, int w, int h);
+static void reorganizetags(const Arg *arg);
 static void resize(Client *c, int x, int y, int w, int h, int interact);
 static void resizeclient(Client *c, int x, int y, int w, int h);
 static void resizemouse(const Arg *arg);
@@ -1348,6 +1349,33 @@ recttomon(int x, int y, int w, int h)
 	return r;
 }
 
+void
+reorganizetags(const Arg *arg) {
+	Client *c;
+	unsigned int occ, unocc, i;
+	unsigned int tagdest[LENGTH(tags)];
+
+	occ = 0;
+	for (c = selmon->clients; c; c = c->next)
+		occ |= (1 << (ffs(c->tags)-1));
+	unocc = 0;
+	for (i = 0; i < LENGTH(tags); ++i) {
+		while (unocc < i && (occ & (1 << unocc)))
+			unocc++;
+		if (occ & (1 << i)) {
+			tagdest[i] = unocc;
+			occ &= ~(1 << i);
+			occ |= 1 << unocc;
+		}
+	}
+
+	for (c = selmon->clients; c; c = c->next)
+		c->tags = 1 << tagdest[ffs(c->tags)-1];
+	if (selmon->sel)
+		selmon->tagset[selmon->seltags] = selmon->sel->tags;
+	arrange(selmon);
+}
+
 void
 resize(Client *c, int x, int y, int w, int h, int interact)
 {

selfrestart.c

@@ -0,0 +1,65 @@
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+/**
+ * Magically finds the current's executable path
+ *
+ * I'm doing the do{}while(); trick because Linux (what I'm running) is not
+ * POSIX compilant and so lstat() cannot be trusted on /proc entries
+ *
+ * @return char* the path of the current executable
+ */
+char *get_dwm_path(){
+    struct stat s;
+    int r, length, rate = 42;
+    char *path = NULL;
+
+    if(lstat("/proc/self/exe", &s) == -1){
+        perror("lstat:");
+        return NULL;
+    }
+
+    length = s.st_size + 1 - rate;
+
+    do{
+        length+=rate;
+
+        free(path);
+        path = malloc(sizeof(char) * length);
+
+        if(path == NULL){
+            perror("malloc:");
+            return NULL;
+        }
+
+        r = readlink("/proc/self/exe", path, length);
+
+        if(r == -1){
+            perror("readlink:");
+            return NULL;
+        }
+    }while(r >= length);
+
+    path[r] = '\0';
+
+    return path;
+}
+
+/**
+ * self-restart
+ *
+ * Initially inspired by: Yu-Jie Lin
+ * https://sites.google.com/site/yjlnotes/notes/dwm
+ */
+void self_restart(const Arg *arg) {
+    char *const argv[] = {get_dwm_path(), NULL};
+
+    if(argv[0] == NULL){
+        return;
+    }
+
+    execv(argv[0], argv);
+}