AIX

Hello.

I'm experiencing a frustrating issue.

I'm using an old, unsupported terminal client (QVT) with AIX 6.1 using ssh2. I've come up with some stty settings that allow full usage of the system but to do so I've had to set "igncr". While this works fine once the user is logged in there are issues when creating a password.

When the user sets a new password of 7 characters and then hits enter a character appears to be added to the end as part of the <enter> (don't know which character - it's invisible because it's a password). When the user then tries to log in with the client's password popup it then doesn't match the original password.

If, when entering the new password, it is committed with ctrl-j instead of <enter> we have no problem so I'm assuming that if the stty settings within the users' .profiles were to be applied before the login prompt the problem would be solved, but I can see no way of doing this. The other alternative is the rather inelegant solution of mapping the enter key to "^j" within the terminal client - I would rather avoid this.

Can any provide any way of changing the stty default settings before the new password prompts?

Many thanks.

The default stty settings for unix are to treat Carriage-Return (aka Enter) as Line-Feed (aka Newline):

Code:

-inlcr -igncr icrnl

What you you get for "stty -a" before modifying the settings in .profile?

Thanks for replying.

The default settings are:

Code:

 
$ stty -a
speed 0 baud; 24 rows; 132 columns;
eucw 1:1:0:0, scrw 1:1:0:0:
intr = ^@; quit = ^@; erase = ^@; kill = ^@; eof = ^@; eol = ^@
eol2 = ^@; start = ^@; stop = ^@; susp = ^@; dsusp = ^Y; reprint = ^@
discard = ^O; werase = ^W; lnext = ^@
-parenb -parodd cs5 -cstopb -hupcl cread -clocal -parext
-ignbrk brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr -icrnl -iuclc
-ixon -ixany -ixoff -imaxbel
isig icanon -xcase echo echoe echok -echonl -noflsh
-tostop echoctl -echoprt -echoke -flusho -pending -iexten
opost -olcuc onlcr -ocrnl -onocr -onlret -ofill -ofdel tab3
$

Hitting the return key with these settings gives me "^M" and I'm assuming that this is the character getting added onto the end of the passwords:

Code:

 
$
ksh: ^M:  not found.
$
ksh: ^M:  not found.
$

If I then do an stty sane I get a sort of double-enter each time:

Code:

 
$ stty sane
$
$ $
$ $

Stty igncr sorts me out nicely:

Code:

 
$ stty igncr
$
$
$

I have the QVT terminal client's Newline setting as "LF" (not "CRLF" or "CR").

usually the client can be set. Try to find a setup.
If not.
when are you logging something ask you about TERM?
what do you ask?
when you are loggined what your $TERM

Code:

echo $TERM

My $TERM is currently "vt220". I can change it to "vt100" and "vt52" on QVT but, as far as I can tell, all three of them react the same to the return key (certainly after login, I haven't checked the password problem with vt100 or vt52).

I assume that this is a "telnet" client not a serial terminal.
The issue seems to be that the terminal emulator is identifying itself as a terminal type which is not in the termcap database. Also, the "enter" key appears to be generating carriage-return and line-feed like an old teletype.
I wonder what value you use for $TERM .

Yes. This seems to be the case even though I don't have the client set to "CRLF".

Perhaps there is something that can be done with the terminfo files in /usr/share/lib/terminfo to persuade AIX to ignore the <CR>s that I can't find a way to stop sending.