linux-kernel - Re: [RFC] fix devpts mount behavior

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Message-ID: <20120124232502.GA22218@us.ibm.com>
Date:	Tue, 24 Jan 2012 15:25:02 -0800
From:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
To:	Serge Hallyn <serge.hallyn@...onical.com>
Cc:	Kay Sievers <kay.sievers@...y.org>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	containers@...ts.linux-foundation.org,
	Dave Hansen <haveblue@...ibm.com>,
	linux-kernel@...r.kernel.org,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andy Whitcroft <apw@...onical.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [RFC] fix devpts mount behavior

Serge Hallyn [serge.hallyn@...onical.com] wrote:
| 
| That has nothing to do with /dev/pts/ptmx, whose perms are set based on
| the '-o ptmxmode=" argument, and default to 000 if not specified.  If
| /dev/ptmx is going to be a symlink to /dev/pts/ptmx, then we have to set
| the /dev/pts/ptmx perms to not be 000, or users won't be able to create
| ptys.

If we are going to make 'newinstance' the default, maybe the default
ptmx mode could be changed to 0666 in the kernel too ?

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