[Xen-devel] Re: [RFC] [PATCH] sysfs support for Xen attributes

[Gerd Hoffmann <kraxel@xxxxxxx>]

Arjan van de Ven wrote:
> >   privcmd returns a filehandle which is then used 
> > for ioctls (misc char dev maybe?). 
> EWWWWWWWWWWWWWW
>
> what is wrong with open() ?????
> things that return fd's that aren't open() (or dup and socket) are just
> evil. Esp if it's in proc or sysfs.
Nothing is wrong with open, but probably the sentense above is a bit too 
short.  If you call fd = open("/proc/xen/privcmd", ...) you'll get a 
filehandle returned for the thingy (as usual) and then you'll use that 
filehandle to call ioctl(fd, ...), so it's the usual unix way ...
cheers,

  Gerd

--
Gerd 'just married' Hoffmann <kraxel@xxxxxxx>
I'm the hacker formerly known as Gerd Knorr.

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