Backspace key does not work in a ssh chroot jail

[John]

----- Original Message -----
> From: Bob Rasmussen <ras at anzio.com>
> To: John <da_audiophile at yahoo.com>
> Cc: "openssh-unix-dev at mindrot.org" <openssh-unix-dev at mindrot.org>
> Sent: Wednesday, April 20, 2016 4:48 PM
> Subject: Re: Backspace key does not work in a ssh chroot jail
> 
> Have you looked at your 'stty' settings? Do
>     stty -a
> and see what the 'erase' variable equates to.
> 
> What are you using for an SSH client? On what OS? Some clients can pass 
> along settings during the login procedure.

Initially, I did not copy /usr/bin/stty from the root filesystem to the jail.  I just did now and I have attached the output of the command you asked about below.  To answer your other question: the ssh client is the linux native /usr/bin/ssh (provided by openssh 7.2p2).

>From within the chroot jail:
$ stty -a
speed 38400 baud; rows 36; columns 128; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>; eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S;
susp = ^Z; rprnt = ^R; werase = ^W; lnext = ^V; discard = ^O; min = 1; time = 0;
-parenb -parodd -cmspar cs8 -hupcl -cstopb cread -clocal -crtscts
-ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon -ixoff -iuclc -ixany -imaxbel -iutf8
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt echoctl echoke -flusho -extproc


>From the native linux environment:
% stty -a
speed 38400 baud; rows 36; columns 128; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>; eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S;
susp = ^Z; rprnt = ^R; werase = ^W; lnext = ^V; discard = ^O; min = 1; time = 0;
-parenb -parodd -cmspar cs8 -hupcl -cstopb cread -clocal -crtscts
-ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon -ixoff -iuclc -ixany -imaxbel iutf8
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt echoctl echoke -flusho -extproc