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Old 8th January 2013
GullibleJones GullibleJones is offline
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Cool Getting hotplugd to work

I'm trying to make OpenBSD automount USB and optical media, so that I don't have to bother with kern.usermount and associated insecurity. Because I'm trying to keep things simple and avoid using regexps, I just want to mount stuff by device name.

My /etc/hotplug/attach file looks like this:

Code:
#!/bin/sh

DEVCLASS=$1
DEVNAME=$2

case $DEVCLASS in
2) # disk devices
        case $DEVNAME in
        sd1) # USB drives
                mount -o nodev,nosuid /dev/sd1i /mnt/flash
                ;;
        cd0) # CD drives
                mount -o nodev,nosuid /dev/cd0a /mnt/optical
                ;;
        esac
esac
This mounts the USB drive, but keeps it read-only for limited users. It never mounts optical media.

How can I get it to mount a CD or DVD? And what's the best way to apply sane permissions to the USB drive, without changing the permissions on the device node?

Edit: okay, major "Duh" moment on the USB permissions problem. The solution is to make the mount directory writeable by whoever needs to write to it.

Still haven't figured out the CD drive though.

Last edited by GullibleJones; 8th January 2013 at 10:01 PM. Reason: One problem solved.
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Old 9th January 2013
J65nko J65nko is offline
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The easiest way to solve the permission problem is to create a "mount" partition, inside the home partition. I am lazy to type so I use a directory called "U"
Code:
 $ sudo mount /dev/cd0a U
I modified your script:
Code:
#!/bin/sh

DEVCLASS=$1
DEVNAME=$2

case $DEVCLASS in
2) # disk devices
        case $DEVNAME in
        *)      echo $(date) : DEVCLASS: $DEVCLASS >>/tmp/debug.attach.txt 2>&1
                echo $(date) : DEVNAME : $DEVNAME >>/tmp/debug.attach.txt  2>&1
        esac
esac
When I plug in an USB memory stick I get this in /tmp/debug.attach:

Code:
[adriaan@hercules]~: cat /tmp/debug.attach.txt                                 
Wed Jan 9 02:41:21 CET 2013 : DEVCLASS: 2
Wed Jan 9 02:41:21 CET 2013 : DEVNAME : sd0
When I put a CD or DVD in my DVD rewriter nothing is being written to that file.
Even the following attach script does not produce anything on inserting a CD.
Code:
#!/bin/sh

cat <<END >>/tmp/debug.attach.txt
$(date)
--------------------------------
$(env)
--------------------------------
$(set)
--------------------------------
END
So no event is happening, thus no running of the script
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Old 9th January 2013
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jggimi jggimi is offline
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The CD drive is not created by disc insertion. The cd0 drive already exists.

amd(8) might be a possible solution.
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