Patch from mksh to make delete key work (closes: #190566)
Index: pdksh-5.2.14/emacs.c
===================================================================
--- pdksh-5.2.14.orig/emacs.c	2009-09-15 20:59:29.000000000 +0200
+++ pdksh-5.2.14/emacs.c	2009-09-15 21:06:50.000000000 +0200
@@ -327,6 +327,26 @@
 	{ XFUNC_next_com,		2,	'B'  },
 	{ XFUNC_mv_forw,		2,	'C'  },
 	{ XFUNC_mv_back,		2,	'D'  },
+		  /* These for ansi arrow keys: arguablely shouldn't be here by
+		   * default, but its simpler/faster/smaller than using termcap
+		   * entries.
+		   */
+	{ XFUNC_meta2,			1,	'['	},
+	{ XFUNC_meta2,			1,	'O'	},
+	{ XFUNC_prev_com,		2,	'A'	},
+	{ XFUNC_next_com,		2,	'B'	},
+	{ XFUNC_mv_forw,		2,	'C'	},
+	{ XFUNC_mv_back,		2,	'D'	},
+	{ XFUNC_mv_begin | 0x80,	2,	'1'	},
+	{ XFUNC_mv_begin | 0x80,	2,	'7'	},
+	{ XFUNC_mv_begin,		2,	'H'	},
+	{ XFUNC_mv_end | 0x80,		2,	'4'	},
+	{ XFUNC_mv_end | 0x80,		2,	'8'	},
+	{ XFUNC_mv_end,			2,	'F'	},
+	{ XFUNC_del_char | 0x80,	2,	'3'	},
+	{ XFUNC_prev_com | 0x80,  2,	  '5'	  },
+	{ XFUNC_next_com | 0x80,  2,	  '6'	  },
+
 };
 
 int
@@ -371,7 +391,14 @@
 			return 0;
 
 		f = x_curprefix == -1 ? XFUNC_insert
-			: x_tab[x_curprefix][c&CHARMASK]; 
+			: x_tab[x_curprefix][c&CHARMASK] ;
+
+		if (f & 0x80) {
+			f &= 0x7F;
+			if ((i = x_e_getc()) != '~')
+				x_e_ungetc(i);
+		}
+
 
 		if (!(x_ftab[f].xf_flags & XF_PREFIX)
 		    && x_last_command != XFUNC_set_arg)
@@ -1385,6 +1412,7 @@
 x_print(prefix, key)
 	int prefix, key;
 {
+	int f = x_tab[prefix][key];
 	if (prefix == 1)
 		shprintf("%s", x_mapout(x_prefix1));
 	if (prefix == 2)
@@ -1393,9 +1421,9 @@
 	if (prefix == 3)
 		shprintf("%s", x_mapout(x_prefix3));
 #endif /* OS2 */
-	shprintf("%s = ", x_mapout(key));
-	if (x_tab[prefix][key] != XFUNC_ins_string)
-		shprintf("%s\n", x_ftab[x_tab[prefix][key]].xf_name);
+	shprintf("%s%s = ", x_mapout(key), (f & 0x80) ? "~" : "");
+	if ((f & 0x7F) != XFUNC_ins_string)
+		shprintf("%s\n", x_ftab[f & 0x7F].xf_name);
 	else
 		shprintf("'%s'\n", x_atab[prefix][key]);
 }
@@ -1410,6 +1438,7 @@
 	int prefix, key;
 	char *sp = NULL;
 	char *m1, *m2;
+	char hastilde;
 
 	if (x_tab == NULL) {
 		bi_errorf("cannot bind, not a tty");
@@ -1437,7 +1466,7 @@
 		return 0;
 	}
 
-	m1 = x_mapin(a1);
+	m2 = m1 = x_mapin(a1);
 	prefix = key = 0;
 	for (;; m1++) {
 		key = *m1 & CHARMASK;
@@ -1453,6 +1482,19 @@
 			break;
 	}
 
+	 if (*++m1 && ((*m1 != '~') || *(m1+1))) {
+                char msg[256] = "key sequence '";
+                const char *c = a1;
+                m1 = msg + strlen(msg);
+                while (*c && m1 < (msg + sizeof(msg) - 3))
+                        strcat(msg, x_mapout(*c++));
+                bi_errorf("%s' too long", msg);
+                return (1);
+        }
+
+	 hastilde = *m1;
+	afree(m2, ATEMP);
+
 	if (a2 == NULL) {
 		x_print(prefix, key);
 		return 0;
@@ -1483,7 +1525,7 @@
 
 	if (x_tab[prefix][key] == XFUNC_ins_string && x_atab[prefix][key])
 		afree((void *)x_atab[prefix][key], AEDIT);
-	x_tab[prefix][key] = f;
+	x_tab[prefix][key] =  f | (hastilde ? 0x80 : 0);
 	x_atab[prefix][key] = sp;
 
 	/* Track what the user has bound so x_emacs_keys() won't toast things */