linux-kernel - Re: [PATCH] virtio_console: Add support for multiple ports for generic guest and host communication

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4AAFA025.3050401@codemonkey.ws>
Date:	Tue, 15 Sep 2009 09:09:41 -0500
From:	Anthony Liguori <anthony@...emonkey.ws>
To:	Gerd Hoffmann <kraxel@...hat.com>
CC:	Amit Shah <amit.shah@...hat.com>, Alan Cox <alan@...ux.intel.com>,
	rusty@...tcorp.com.au, virtualization@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, greg@...ah.com
Subject: Re: [PATCH] virtio_console: Add support for multiple ports for generic
 guest and host communication

Gerd Hoffmann wrote:
>> Userspace can detect when new virtio-consoles appear via udev events.
>> When it sees a new ttyVN, it can then look in sysfs to discover it's 
>> name.
>
> No.  udev can create symlinks for you, so apps don't have to dig into 
> sysfs.  You'll need a rule along the lines (untested):
>
>    SUBSYSTEM=="virtio", \
>    DRIVERS="virtio-console", \
>    SYMLINK+="vcon/$attr{name}"
>
> then udev will create a /dev/vcon/org.qemu.clipboard symlink pointing 
> to dev/ttyV0.  Apps can just open /dev/vcon/$name then.

That works equally well.  I don't necessarily think that naming is more 
useful.

Regards,

Anthony Liguori
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/