How do I automatically mount a flash disk when inserted?

Subject: How do I automatically mount a flash disk when inserted?
Date: 01/28/98

Under BSD/OS 4.0 you can automatically mount and unmount an ATA PC Card Flash disk when it is inserted or removed from your system. The key is to use the /etc/pccard.conf file and the new -F option to umount.

In my example I added the following two lines to my /etc/pccard.conf file:

	wdc	@insert "/usr/local/libexec/flashin %D %U %S"
	wdc	@remove "/usr/local/libexec/flashout %D %U %S"

The %D is replaced with the device name (wdc), the %U is replaced with the unit number (typically 1 or 2) and the %S is replaced with the slot number. In my system I have configured my kernel with:

	wd2	at wdc1 drive 0
	wd3	at wdc2 drive 0

So unit 1 is always wd2 and unit 2 is always wd3. My flashin script looks like:

	#! /bin/sh
	case $2 in)
	1) DEV=2 ;;
	2) DEV=3 ;;
	*) exit 0;;
	esac
	fakelabel -u wd$DEV
	mount -t msdos -r /dev/wd${DEV}d /mnt/flash$2

and the flashout script is:

	#! /bin/sh
	case $2 in)
	1) DEV=2 ;;
	2) DEV=3 ;;
	*) exit 0;;
	esac
	umount -F /mnt/flash$2

The -F option is needed because the mount is done *after* the disk is removed! If you upgrade the mount to read/write you should be sure to unmount or downgrade the mount before pulling the disk.

I have directories in /mnt on which I mount things (I do not mount directly on /mnt). Note that you must already have made the directories /mnt/flash1 and /mnt/flash2 as mount points.

You can abuse this procedure, but then you get what you deserve.