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Cygwin 1.7.5-1: backspace does not work correctly when using "set -o vi" in pdksh in the console window
- From: RISINGP1 at nationwide dot com
- To: cygwin at cygwin dot com
- Date: Mon, 19 Apr 2010 18:52:45 -0400
- Subject: Cygwin 1.7.5-1: backspace does not work correctly when using "set -o vi" in pdksh in the console window
When using the "set -o vi" mode in pdksh, the backspace key is no longer a
movement key - it does not make the cursor move to the left over the
existing characters leaving them unchanged when the command line edit mode
is entered using the ESC key. The cursor does not move at all.
Steps to reproduce:
1) Change the startup cygwin batch file
pdksh -l -i
2) Once the console window is open, enter the command "stty erase ^?"
(this is the incorrect character value (0x7f) that the backspace key is
now sending in the console window - it should be sending ^H (0x08) like it
has for decades in every terminal interface I have used, except for one -
the 0x7f value is what used to be generated by the Delete key.)
3) Enter the command "set -o vi"
4) Start typing a new command (e.g., "xyzzy")
5) Press the ESC key to enter the command line edit mode (the cursor
positions itself on the last "y")
6) Press the backspace key
Expected result: the cursor backs up over the characters
leaving them unchanged
Actual result: the cursor does not move
The ability to modify the character value generated by the Backspace key
is a logical solution rather than forcing people to accept a change to the
0x7f value. I have many programs that rely on the value generated by the
Backspace key being 0x08. The PuTTY program allows the user to choose
which character values get generated by the Backspace and Delete keys, and
I consider this a nice feature as it allows programs to behave as expected
no matter what interface they are expecting.
Phil Rising, Principal Consultant in the Managed Testing Practice for
Sogeti USA, LLC
Contracted to Nationwide, Corporate Internet and Contact Center Solutions
(Work) (614) 677-7445, (Fax) (614) 677-7046
Alternate email: Phil.Rising@us.sogeti.com
Problem reports: http://cygwin.com/problems.html
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