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Re: Strange-Dangerous behaviour in Cygwin
- From: Angelo Graziosi <Angelo dot Graziosi at roma1 dot infn dot it>
- To: Eric Blake <ebb9 at byu dot net>
- Cc: cygwin at cygwin dot com
- Date: Tue, 10 May 2005 22:25:21 +0200 (MET DST)
- Subject: Re: Strange-Dangerous behaviour in Cygwin
I have not changed anything in configuration (I have not "touched" any
thing in " /etc/profile " etc.)
Until some days ago all worked fine. With some upgrades or i do not know
"what" the BACKSPACE does not work correctly in answering at command like
rm -i: it works as a LEFT arrow key. This happens in standard
(cygwin.bat) bash shell and in xterm but NO in RXVT or in DOS box
(CMD.EXE) with c:\cygwin\bin in PATH (i.e. using rm -i in DOS box).
As I wrote, I have reinstalled cygwin using only BASE packages to verify
the strange behaviour.
My settings:
$ stty -a
speed 38400 baud; rows 25; columns 80; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; swtch = ^Z; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R;
werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 0;
-parenb -parodd cs8 -hupcl -cstopb cread -clocal -crtscts
-ignbrk brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon
-ixoff
-iuclc -ixany -imaxbel
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0
vt0 ff0
isig icanon iexten echo -echoe -echok -echonl -noflsh -tostop -echoctl
-echoke
I get the previous output in standard bash shell, in RXVT and xterm (and
I noted erase=^?).
In standard bash shell:
$ echo $TERM
cygwin
In RXVT and xterm:
$ echo $TERM
xterm
If I type BACKSPACE at prompt (bash, RXVT, xterm) I get a "beep"
If I type
$rm -i foo.txt
rm: remove regular file `foo.txt'?yBAKSPACEn
the cursor is moved left on "y" (or under "y" in standard bash
shell): it does not delete the "y"; then the "n" overwrite the "y" but the
command (rm -i) read the first character typed, so the file 'foo.txt' is
deleted.
I have discovered this strange behaviour with the lost of some (not
important, fortunately) files.
If I type
$ [CTRL-v]BACKSPACE
I get
$ ^H
If I type (using copy paste from your mail)
$ stty erase ^H
then the BACKSPACE work fine (in answering e.g. rm -i)
but
$ stty
speed 38400 baud; line = 0;
-imaxbel
-echoe -echok -echoctl -echoke
Where is "erase = ..."?
closing the shell, the next time I have the previous wrong behaviour of
BACKSPACE!
Should I reimpost "stty erase ..." every time?
However the questions are:
There is a bug in Cygwin?
Have I inadvertently changed something?
How can I adjust?
I have read the replays but I am confused.
Thanks,
angelo.
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