"stty discard undef" fails under Mac OS X

[Vincent Lefevre]

Hi,

Under Mac OS X:

prunille:~> /usr/local/bin/stty --version
stty (GNU coreutils) 6.7
[...]
prunille:~> /usr/local/bin/stty discard undef
/usr/local/bin/stty: invalid argument `discard'
Try `/usr/local/bin/stty --help' for more information.
zsh: exit 1     /usr/local/bin/stty discard undef

But with the stty provided by Mac OS X, "/bin/stty discard undef"
works as expected:

prunille% /bin/stty -a | grep discard
cchars: discard = ^O; dsusp = ^Y; eof = ^D; eol = <undef>;
prunille% /bin/stty discard undef
prunille% /bin/stty -a | grep discard
cchars: discard = <undef>; dsusp = ^Y; eof = ^D; eol = <undef>;

It seems that "stty flush undef" does the same thing and works
with the coreutils, but it isn't described in the coreutils stty(1)
man page and in the "stty --help" output:

prunille:~> /usr/local/bin/stty --help | grep flush
 * dsusp CHAR    CHAR will send a terminal stop signal once input flushed
 * [-]imaxbel    beep and do not flush a full input buffer on a character
   [-]noflsh     disable flushing after interrupt and quit special characters

-- 
Vincent Lefèvre <address@hidden> - Web: <http://www.vinc17.org/>
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Work: CR INRIA - computer arithmetic / Arenaire project (LIP, ENS-Lyon)