linux-kernel - Re: [patch] util-linux-ng: unprivileged mounts support

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Date:	Sat, 19 Jan 2008 21:32:22 +0100
From:	Miklos Szeredi <miklos@...redi.hu>
To:	szaka@...s-3g.org
CC:	miklos@...redi.hu, util-linux-ng@...r.kernel.org,
	akpm@...ux-foundation.org, hch@...radead.org, serue@...ibm.com,
	viro@....linux.org.uk, kzak@...hat.com,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	containers@...ts.osdl.org
Subject: Re: [patch] util-linux-ng: unprivileged mounts support

> > This is an experimental patch for supporing unprivileged mounts and
> > umounts.  
> 
> User unmount unfortunately still doesn't work if the kernel doesn't have 
> the unprivileged mount support but as we discussed this in last July that 
> shouldn't be needed for this case.
> 
>   % mount -t ntfs-3g /dev/hda10 /tmp/test
>   % cat /proc/mounts | grep /tmp/test                                                                         
>   /dev/hda10 /tmp/test fuseblk rw,nosuid,nodev,user_id=501,group_id=501,allow_other 0 0
>   % mount | grep /tmp/test
>   /dev/hda10 on /tmp/test type fuseblk (rw,nosuid,nodev,allow_other,blksize=1024,user=szaka)
>   % umount /tmp/test
>   umount: /dev/hda10: not mounted
>   umount: /tmp/test: must be superuser to umount
>   umount: /dev/hda10: not mounted
>   umount: /tmp/test: must be superuser to umount

But 'fusermount -u /tmp/test' does work, doesn't it?

Yes, this should probably be fixed in umount(8), but it's an (almost)
completely separate issue.

Miklos
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