Date: Thu, 01 Nov 2007 19:54:05 +0000 From: Vince <jhary@unsane.co.uk> To: Darren Spruell <phatbuckett@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: Set perms on attach of USB umass disk Message-ID: <472A2EDD.1050706@unsane.co.uk> In-Reply-To: <839aec700711011053i3b4d7c7dmbbd5afde03ba513a@mail.gmail.com> References: <839aec700711011053i3b4d7c7dmbbd5afde03ba513a@mail.gmail.com>
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Darren Spruell wrote: > I've been trying (and failing) to figure out how to adjust ownership > or permissions of a USB memory stick on device attach. > > > umass0: SanDisk Corporation Cruzer Mini, rev 2.00/0.20, addr 5 > da0 at umass-sim0 bus 0 target 0 lun 0 > da0: <SanDisk Cruzer Mini 0.4> Removable Direct Access SCSI-2 device > da0: 1.000MB/s transfers > da0: 977MB (2001888 512 byte sectors: 64H 32S/T 977C) > > $ usbdevs -v > Controller /dev/usb0: > addr 1: full speed, self powered, config 1, UHCI root hub(0x0000), > Intel(0x0000), rev 1.00 > port 1 addr 2: full speed, power 100 mA, config 1, Dell USB Keyboard > Hub(0x1004), Dell(0x413c), rev 48.01 > port 1 addr 3: low speed, power 90 mA, config 1, Dell USB Keyboard > Hub(0x2006), Dell(0x413c), rev 48.00 > port 2 addr 5: full speed, power 100 mA, config 1, Cruzer > Mini(0x5150), SanDisk Corporation(0x0781), rev 0.20 > > > I've tried altering devfs.conf but this appears to only work for > devices that are attached at startup of devfs. I've tried configuring > devd(8): > > attach 100 { > device-name "da[0-9]+s1"; > action "/bin/chmod 0660 $device-name"; > }; > > attach 100 { > device-name "da[0-9]+"; > action "/bin/chmod 0660 $device-name"; > }; > > Neither of these seem to result in the permission change I'm after > (making device writable by my user which is in the operator group): > > $ ls -l /dev/da0* > crw-r----- 1 root operator 0, 165 Oct 21 13:08 /dev/da0 > crw-r----- 1 root operator 0, 166 Oct 21 13:08 /dev/da0s1 > > What's the right way to handle this? > create a new file /etc/devfs.rules with contents [system=10] add path 'da*' mode 660 group operator Then in /etc/rc.conf add devfs_system_ruleset="system" and restart devfs (/etc/rc.d/devfs restart) This should do the job, for futher reading devfs.rules has a manpage. Vince
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