Date: Mon, 10 Aug 1998 19:50:07 +0200 (CEST) From: Christian Weisgerber <naddy@bigeye.rhein-neckar.de> To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: kern/7559: pcvt treats DEL as a printable character Message-ID: <199808101750.TAA02863@bigeye.rhein-neckar.de>
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>Number: 7559
>Category: kern
>Synopsis: pcvt treats DEL as a printable character
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Aug 10 11:40:00 PDT 1998
>Last-Modified:
>Originator: Christian Weisgerber
>Organization:
>Release: FreeBSD 2.2.7-STABLE i386
>Environment:
pcvt VT220-compatible console driver.
>Description:
The pcvt console driver outputs a glyph for the ASCII DEL (0x7F)
character. This differs from the behavior of an actual DEC VT220
terminal which treats DEL as a non-printable no-op control character.
>How-To-Repeat:
>Fix:
--- /sys/i386/isa/pcvt/pcvt_out.c.orig Fri Mar 7 09:58:26 1997
+++ /sys/i386/isa/pcvt/pcvt_out.c Mon Aug 10 16:12:49 1998
@@ -178,10 +178,10 @@
if(svsp->sevenbit)
ch &= 0x7f;
- if((ch <= 0x1f) && (svsp->transparent == 0))
+ if(((ch <= 0x1f) || (ch == 0x7f)) && (svsp->transparent == 0))
{
- /* always process control-chars in the range 0x00..0x1f !!! */
+ /* always process control-chars in the range 0x00..0x1f, 0x7f !!! */
if(svsp->dis_fnc)
{
@@ -323,6 +323,7 @@
case 0x1d: /* GS */
case 0x1e: /* RS */
case 0x1f: /* US */
+ case 0x7f: /* DEL */
break;
}
}
@@ -330,7 +331,8 @@
else
{
- /* char range 0x20...0xff processing depends on current state */
+ /* char range 0x20...0x7e, 0x80...0xff processing */
+ /* depends on current state */
switch(svsp->state)
{
@@ -1884,7 +1886,7 @@
* partial HP 2392 ANSI mode Emulator
* ==================================
*
- * this part tooks over the emulation of some escape sequences
+ * this part takes over the emulation of some escape sequences
* needed to handle the function key labels
*
* They are modeled after the corresponding escape sequences
>Audit-Trail:
>Unformatted:
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