bug in cygwin <sys/termios.h>?

Corinna Vinschen corinna-cygwin@cygwin.com
Fri Jan 21 12:30:00 GMT 2005


On Jan 20 21:36, Eric Blake wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> When compiling coreutils/src/stty.c, I got a warning from this segment:
> 
> /* ISC renamed swtch to susp for termios, but we'll accept either name.  */
> #if defined(VSUSP) && !defined(VSWTCH)
> # define VSWTCH VSUSP
> # define CSWTCH CSUSP
> #endif
> #if defined(VSWTCH) && !defined(CSWTCH)
> # define CSWTCH _POSIX_VDISABLE
> #endif
> 
> stty.c:106:1: warning: "CSWTCH" redefined
> In file included from /usr/include/termios.h:4,
>                  from stty.c:40:
> /usr/include/sys/termios.h:85:1: warning: this is the location of the
> previous definition
> 
> Investigation of sys/termios.h shows that cygwin has "#define CSWTCH 0x1a"
> (ctrl-z), "#define CSUSP CTRL('z')" (where CTRL is ((ch)&0x1f), "#define
> VSUSP 14", "#define VSWTC 15", but no VSWTCH anywhere!  Is VSWTC a typo
> for the intended VSWTCH?  And why are VSUSP and VSWTC distinct, when
> CSWTCH and CSUSP are the same and coreutils was trying to use VSUSP as an
> alias to VSWTCH?

Looks like a bug in coreutils to me.  The above mentioned defines are
not equal, but equivalent defined on Linux.

Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          mailto:cygwin@cygwin.com
Red Hat, Inc.

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