[src/trunk]: src/usr.bin/tset Restore logic for setting the VERASE character.

[mlelstv <mlelstv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/28eb5d25614d
branches:  trunk
changeset: 338982:28eb5d25614d
user:      mlelstv <mlelstv%NetBSD.org@localhost>
date:      Sun Jun 21 08:23:22 2015 +0000

description:
Restore logic for setting the VERASE character.
- use terminfo _unless_ the terminal does overstrike.
- use terminfo data not only for an unset tty.

diffstat:

 usr.bin/tset/set.c |  28 +++++++++++++++-------------
 1 files changed, 15 insertions(+), 13 deletions(-)

diffs (50 lines):

diff -r ab27966f3c22 -r 28eb5d25614d usr.bin/tset/set.c
--- a/usr.bin/tset/set.c        Sun Jun 21 07:45:10 2015 +0000
+++ b/usr.bin/tset/set.c        Sun Jun 21 08:23:22 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: set.c,v 1.17 2012/04/21 12:27:30 roy Exp $     */
+/*     $NetBSD: set.c,v 1.18 2015/06/21 08:23:22 mlelstv Exp $ */
 
 /*-
  * Copyright (c) 1991, 1993
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: set.c,v 1.17 2012/04/21 12:27:30 roy Exp $");
+__RCSID("$NetBSD: set.c,v 1.18 2015/06/21 08:23:22 mlelstv Exp $");
 
 #include <err.h>
 #include <stdio.h>
@@ -151,18 +151,20 @@
 void
 set_control_chars(int erasechar, int intrchar, int killchar)
 {
+       int bs_char;
+
+       if (key_backspace != NULL && key_backspace[1] == '\0')
+               bs_char = key_backspace[0];
+       else
+               bs_char = 0;
        
-       if (mode.c_cc[VERASE] == 0 || erasechar != 0) {
-               if (erasechar == 0) {
-                       if (over_strike &&
-                           key_backspace != NULL &&
-                           key_backspace[1] == '\0')
-                               mode.c_cc[VERASE] = key_backspace[1];
-                       else
-                               mode.c_cc[VERASE] = CERASE;
-               } else
-                       mode.c_cc[VERASE] = erasechar;
-       }
+       if (erasechar == 0 && bs_char != 0 && !over_strike)
+               erasechar = -1;
+       if (erasechar < 0)
+               erasechar = (bs_char != 0) ? bs_char : CTRL('h');
+
+       if (mode.c_cc[VERASE] == 0 || erasechar != 0)
+                mode.c_cc[VERASE] = erasechar ? erasechar : CERASE;
 
        if (mode.c_cc[VINTR] == 0 || intrchar != 0)
                 mode.c_cc[VINTR] = intrchar ? intrchar : CINTR;