Date: Fri, 21 Apr 2006 09:05:41 +0400 From: Igor Pokrovsky <ip@doom.homeunix.org> To: Joe Marcus Clarke <marcus@freebsd.org> Cc: hackers@freebsd.org Subject: Re: User mounting take 2 Message-ID: <20060421050541.GA3223@doom.homeunix.org> In-Reply-To: <1145077545.83050.15.camel@shumai.marcuscom.com> References: <1145077545.83050.15.camel@shumai.marcuscom.com>
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On Sat, Apr 15, 2006 at 01:05:45AM -0400, Joe Marcus Clarke wrote: > Based on feedback I received on my initial diff, I took another crack at > user mounting. To address Robert's concerns, I drop the setuid > permissions until needed. Therefore, all permission checks are now done > in the kernel. The same is true for umount(8). > > silby asked for wildcard support. To handle that, I added glob support > to both the fs_file and fs_spec fstab components (via fnmatch(3)), and > also added a special %u pattern that can be used to represent the > current user (i.e. the user running mount(8)). This effectively allows > the following in /etc/fstab: > > //%u@server/homes /home/%u/smb_home smbfs rw,noauto,user 0 0 > > Then, a user could just run, for example: > > mount /home/marcus/smb_home > > And their SMB home directory would get mounted (~/.nsmbrc is also > respected). > > Additionally, something like the following is also possible: > > /dev/acd0 /home/*/cdrom cd9660 ro,noauto,user 0 0 > > Same mount command works here: > > mount /home/marcus/cdrom > > Wildcards can also be mixed and matched. > > Finally, in testing this, I found a problem with smbfs, msdosfs, and > ntfs relating to the statfs(2) f_flags field. smbfs always set this to > 0, msdosfs didn't set this at all, and ntfs set this to all flags (not > just those visible to statfs(2)). By fixing this, umount(8) works > properly on relative paths to user mount points for those three file > systems. > > http://www.marcuscom.com/downloads/usermount.diff > > Comments? Great feature! Hopefully it will hit the tree soon enough. Thanks! -ip -- A free agent is anything but.
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