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From: Dtcohen AT aol DOT com
Message-ID: <46.6ee30c.25af7d54@aol.com>
Date: Thu, 13 Jan 2000 14:11:16 EST
Subject: Canonical mode problem with v1.0
To: cygwin AT sourceware DOT cygnus DOT com
CC: fusz AT cadlab DOT tu-berlin DOT de, Dtcohen AT aol DOT com
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> On Thu, Jan 13, 2000 at 12:24:12PM -0500, Dtcohen AT aol DOT com wrote:
> >> If you need to wait until "RETURN" is pressed maybe you have succes with
> >> "gets()". Using "scanf()" is dangerous, because sometimes "RETURN" is left in
> >> the buffer.
> >
> >Yes, using gets() or fgets() for a small program would work better, but
> >the real problem is that canonical mode is broken for v1.0 (the man
> >page for "termio" explains this in detail, but it basically means getc(stdin)
> >should block until a carriage return is entered).  Canonical mode also
> >allows the user to backspace over his mistakes -- which also doesn't work
> >with v1.0.
> 
> I just tried cat >/dev/null using the cygwin CD.  I could edit the line
> as expected.  I tried this from the command line, under bash, and under
> /bin/sh.  All of them worked fine.
> 
> I think that if canonical mode was really broken we would have heard about
> it from a numbe of different directions by now.
> 
> I also tried your test case, which worked as expected.
> 
> As a wild guess, it sounds like you may not be using the Cygwin 1.0 DLL.
> 
> cgf
> 
> --

Chris,

     Thanks for getting back to me.

     Regarding your suggestion about Cygwin 1.0 DLL:

ls -l /bin/cygwin1.dll gives:
-rw-r--r--   1 jgrishaw None       804728 Sep 13 22:15 /bin/cygwin1.dll

There are no other cygwin1.dll's on my hard drive.

My $PATH is set to:
//D/grishaw/bin:/bin:/contrib/bin:/usr/i686-cygwin/bin:/usr/local/bin:/usr/local/bin/X11:/usr/X11R6/bin:/usr/lib/gcc-lib/i686-cygwin/2.9-cygwin-990830://D/ModelTech/win32://C/WINNT/SYSTEM32://C/WINNT

stty -a yields:
speed 38400 baud; rows 65; columns 80; line = 0;
intr = ^C; quit = ^\; erase = ^H; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; 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

(notice "icanon")

And yet backspace does not work when I run sh.exe, or cat > /dev/null,
or dc, etc, etc, etc.

     I'm stumped.  Please offer any suggestions for where to look for the
problem.


                Many thanks,

                Jim Grishaw.


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