Messages in this thread | | | Date | Fri, 17 Feb 2006 21:26:32 +0000 | From | Russell King <> | Subject | Re: [PATCH] SIIG 8-port serial boards support |
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On Fri, Feb 17, 2006 at 02:32:03PM -0600, Kilau, Scott wrote: > Hi everyone, > (Sorry for the ugly copy/paste here, grabbing from a web browser to > email) > > On Fri, Feb 17, 2006 at 08:02:13PM +0000, Russell King wrote: > > Finally, let me explain why I favour the termios solution. The > biggest > > (and most important) aspect is that it allows existing applications > > such as minicom and gettys to work as expected - getting the correct > > handshaking mode that they desire without having to change userspace. > > What about creating a "struct termiox". > Yeah, it creates a new ioctl, but it is a pretty standard > ioctl among Unix's. > > I know adding termiox calls has been brought up before in > the past, and of course, nothing ever gets added...
That still requires getty's and minicom etc to be modified, and as I point out in my follow up mail, not having getty understand it can be a security issue.
Since we do have spare bits in cflag, I see no reason not to use them. If we use these spare bits, we stand a good chance that we'll have the desired behaviour without modifying userland.
I've seen the occasional alternative suggestion, but no one has yet put forward a coherent argument against using termios's cflags to control the handshake mode.
-- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: 2.6 Serial core - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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