Date: Wed, 7 Dec 2011 04:49:01 -0600 From: "Zane C. B-H." <v.velox@vvelox.net> To: freebsd-questions@freebsd.org Subject: Re: umass to /dev/da* mapping Message-ID: <20111207044901.72ace69f@vixen42.vulpes.vvelox.net> In-Reply-To: <201112051708.16072.jmc-freebsd2@milibyte.co.uk> References: <201112051708.16072.jmc-freebsd2@milibyte.co.uk>
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On Mon, 5 Dec 2011 17:08:15 +0000 Mike Clarke <jmc-freebsd2@milibyte.co.uk> wrote: > > I have a fairly simple perl script which is run by devd when I plug > in a USB memory stick. The script sets up some permissions and a > link to make life easy for a user to mount the memory stick. > > This normally works fine but there are problems if the memory stick > is already inserted before booting. > > Normally my internal 4 slot memory card reader is detected as > umass0 with devices da[0-3] and when the USB memory stick is > inserted it comes up as umass1 with device da4 and my script works > on that assumption. If the USB stick is present on booting then it > appears as da0 on umass0 and the card reader is da[1-4] on umass1 > so the script fails. > > Is there any convenient way for my script to determine which da* > devices correspond to the umass device name? Why are you using a custom Perl script for this instead of the built in tools for this? Below is how I have it setup on my system... In /etc/devfs.rules... [localrules=10] add path 'da*s*' mode 0660 group 5001 In /etc/rc.conf... devfs_system_ruleset="localrules" In /etc/sysctl.conf... vfs.usermount=1 And what group 5001 is... [kitsune@vixen42]/etc> getent group 5001 devDAaccess:*:5001:kitsune [kitsune@vixen42]/etc> Allows the group "devDAaccess" to access /dev/da*s* and mount it. For more reading on this, I suggest the following man files... devfs.rules(5) rc.conf(5) devfs(8)
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