diff -r fe61798f04a5 st.c
--- a/st.c	Sun Apr 03 21:40:33 2011 +0200
+++ b/st.c	Tue Apr 05 13:01:54 2011 +0100
@@ -220,6 +220,7 @@
 static inline int selected(int, int);
 static void selcopy(void);
 static void selpaste(void);
+static void seledit(void);
 
 static int utf8decode(char *, long *);
 static int utf8encode(long *, char *);
@@ -402,9 +403,86 @@
 
 void
 bpress(XEvent *e) {
-	sel.mode = 1;
-	sel.ex = sel.bx = (e->xbutton.x - BORDER)/xw.cw;
-	sel.ey = sel.by = (e->xbutton.y - BORDER)/xw.ch;
+	if(e->xbutton.button == 2){
+		seledit();
+	}else{
+		sel.mode = 1;
+		sel.ex = sel.bx = (e->xbutton.x - BORDER)/xw.cw;
+		sel.ey = sel.by = (e->xbutton.y - BORDER)/xw.ch;
+	}
+}
+
+void
+seledit(void) {
+	struct stat st;
+	char fname[64], cmd[128];
+	char *env = getenv("TMPDIR");
+	char *sel = NULL;
+	int fd;
+	int x, y;
+
+	DEFAULT(env, "/tmp");
+	snprintf(fname, sizeof fname, "%s/st_edXXXXXX", env);
+
+	fd = mkstemp(fname);
+	if(fd == -1){
+		perror("mkstemp()");
+		return;
+	}
+
+	for(y = 0; y < term.row; y++) {
+		for(x = 0; x < term.col; x++)
+			if(isprint(term.line[y][x].c[0])) /* FIXME: unicode */
+				write(fd, term.line[y][x].c, utf8size(term.line[y][x].c));
+
+		write(fd, "\n", 1);
+	}
+	close(fd);
+
+	env = getenv("VISUAL");
+	DEFAULT(env, getenv("EDITOR"));
+	DEFAULT(env, "vi");
+
+	snprintf(cmd, sizeof cmd, "%s %s %s", EDIT_TERMINAL " -e", env, fname);
+
+	signal(SIGCHLD, SIG_DFL);
+	if(system(cmd) != 0){ /* FIXME: manual fork() and wait() */
+		signal(SIGCHLD, sigchld);
+		perror(cmd);
+		goto bail;
+	}
+	signal(SIGCHLD, sigchld);
+
+	fd = open(fname, O_RDONLY);
+	if(fd == -1){
+		perror(fname);
+		goto bail;
+	}
+
+	if(fstat(fd, &st) != 0){
+		perror("fstat()");
+		goto bail;
+	}
+
+	sel = malloc(st.st_size + 1);
+	if(!sel){
+		perror("malloc()");
+		goto bail;
+	}
+
+	if(read(fd, sel, st.st_size) == -1){
+		perror("read()");
+		goto bail;
+	}
+
+	sel[st.st_size] = '\0';
+	xsetsel(sel);
+	sel = NULL; /* prevent sel.clip deallocation */
+
+bail:
+	free(sel);
+	close(fd);
+	remove(fname);
 }
 
 void
diff -r fe61798f04a5 config.def.h
--- a/config.def.h	Sun Apr 03 21:40:33 2011 +0200
+++ b/config.def.h	Tue Apr 05 13:08:10 2011 +0100
@@ -4,6 +4,7 @@
 #define BOLDFONT "-*-*-bold-r-*-*-*-120-75-75-*-60-*-*"
 #define BORDER 2
 #define SHELL "/bin/sh"
+#define EDIT_TERMINAL "st"
 
 /* Terminal colors */
 static const char *colorname[] = {