$NetBSD$

Add support for plumbing with the right click button.

Inspired by `right click to plumb' patch.

--- config.def.h.orig	2020-03-28 15:14:27.000000000 +0000
+++ config.def.h
@@ -65,6 +65,8 @@ static int bellvolume = 0;
 /* default TERM value */
 char *termname = "st-256color";
 
+char *plumber = "plumb"
+
 /*
  * spaces per tab
  *
--- st.c.orig	2020-05-21 20:15:34.000000000 +0000
+++ st.c
@@ -721,7 +721,7 @@ sigchld(int a)
 	int stat;
 	pid_t p;
 
-	if ((p = waitpid(pid, &stat, WNOHANG)) < 0)
+	if ((p = waitpid(WAIT_ANY, &stat, WNOHANG)) < 0)
 		die("waiting for pid %hd failed: %s\n", pid, strerror(errno));
 
 	if (pid != p)
--- x.c.orig	2020-05-21 20:15:34.000000000 +0000
+++ x.c
@@ -684,6 +684,8 @@ xsetsel(char *str)
 void
 brelease(XEvent *e)
 {
+	pid_t child;
+
 	if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 		mousereport(e);
 		return;
@@ -693,6 +695,16 @@ brelease(XEvent *e)
 		return;
 	if (e->xbutton.button == Button1)
 		mousesel(e, 1);
+	else if (e->xbutton.button == Button3 && xsel.primary) {
+		switch (child = fork()) {
+			case -1:
+				return;
+			case 0:
+				execvp(plumber, (char *const [])
+				    {plumber, xsel.primary, NULL });
+				_exit(127);
+		}
+	}
 }
 
 void