# appends rule and client flag: ispermanent
# prevents accidental closing
# for dwm 6.2
# based on: https://dwm.suckless.org/patches/ispermanent

diff --git a/config.def.h b/config.def.h
index 1c0b587..35b0f8d 100644
--- a/config.def.h
+++ b/config.def.h
@@ -26,9 +26,9 @@ static const Rule rules[] = {
 	 *	WM_CLASS(STRING) = instance, class
 	 *	WM_NAME(STRING) = title
 	 */
-	/* class      instance    title       tags mask     isfloating   monitor */
-	{ "Gimp",     NULL,       NULL,       0,            1,           -1 },
-	{ "Firefox",  NULL,       NULL,       1 << 8,       0,           -1 },
+	/* class      instance    title       tags mask     isfloating   ispermanent  monitor */
+	{ "Gimp",     NULL,       NULL,       0,            1,           0,           -1 },
+	{ "Firefox",  NULL,       NULL,       1 << 8,       0,           0,           -1 },
 };
 
 /* layout(s) */
diff --git a/dwm.c b/dwm.c
index 4465af1..d2620e3 100644
--- a/dwm.c
+++ b/dwm.c
@@ -93,6 +93,7 @@ struct Client {
 	int bw, oldbw;
 	unsigned int tags;
 	int isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
+	int ispermanent;
 	Client *next;
 	Client *snext;
 	Monitor *mon;
@@ -138,6 +139,7 @@ typedef struct {
 	const char *title;
 	unsigned int tags;
 	int isfloating;
+	int ispermanent;
 	int monitor;
 } Rule;
 
@@ -298,6 +300,7 @@ applyrules(Client *c)
 		&& (!r->instance || strstr(instance, r->instance)))
 		{
 			c->isfloating = r->isfloating;
+			c->ispermanent = r->ispermanent;
 			c->tags |= r->tags;
 			for (m = mons; m && m->num != r->monitor; m = m->next);
 			if (m)
@@ -1001,7 +1004,7 @@ keypress(XEvent *e)
 void
 killclient(const Arg *arg)
 {
-	if (!selmon->sel)
+	if (!selmon->sel || selmon->sel->ispermanent)
 		return;
 	if (!sendevent(selmon->sel, wmatom[WMDelete])) {
 		XGrabServer(dpy);