Pty ports and TIOCUCNTL mode

[Chris Torek]

In article <1019 at sdcc7.ucsd.EDU> muller at sdcc7.ucsd.EDU (Keith Muller) writes:
>Several vendors support TIOCUCNTL, but do not define UIOCMD in ioctl.h which
>is why #define JBOOT _IO(u, 1) etc was suggested over UIOCMD, there is no
>"rightness" here.

Actually, there is; _IO is an internal macro and its first argument
might change, so UIOCCMD is right and _IO is wrong.

(If you do not believe _IO's first argument might change, think again.
It already did!  UIOCCMD is now defined as _IO('u', n).)
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163)
Domain:	chris at mimsy.umd.edu	Path:	uunet!mimsy!chris