The syntax for the vold.conf file is shown here.

# Database to use
db database

# Labels supported
label label_type shared_object device

# Devices to use
use device type special shared_object symname [ options ]

# Actions
insert regex [ options ] program program args
eject regex [ options ] program program args
notify regex [ options ] program program args

# List of file system types unsafe to eject
unsafe fs_type fs_type

Of these syntax fields, you can safely modify Devices to use and Actions.

All use device statements must be grouped together by device type. (For example, all use cdrom statements must be grouped together; and all use floppy statements must be grouped together.) Here are the explanations of the syntax for the Devices to use field.

device

The type of removable media device to be used. Legal values are cdrom, floppy, pcmem and rmdisk.

type

The specific capabilities of the device. Legal value is drive.

special

This sh(1) expression specifies the device or devices to be used. Path usually begins with /dev.

shared_object

The name of the program that manages this device. vold(1M) expects to find this program in /usr/lib/vold.

symname

The symbolic name that refers to this device. The symname is placed in the device directory.

options

The user, group, and mode permissions for the media inserted (optional).

The special and symname parameters are related. If special contains any shell wildcard characters (i.e., has one or more asterisks or question marks in it), then the syname must have a "%d" at its end. In this case, the devices that are found to match the regular expression are sorted, then numbered. The first device will have a zero filled in for the "%d", the second device found will have a one, and so on.

If the special specification does not have any shell wildcard characters then the symname parameter must explicitly specify a number at its end (see EXAMPLES below).

Here are the explanations of the syntax for the Actions field.

insert|eject|notify

The media event prompting the event

regex

This sh(1) regular expression is matched against each entry in the /vol file system that is being affected by this event.

options

You can specify what user or group name that this event is to run as (optional).

program

The full path name of an executable program to be run when regex is matched.

program args

Arguments to the program.

The default vold.conf file is shown here.

# # Volume Daemon Configuration file # # Database to use (must be first) db db_mem.so # Labels supported label dos label_dos.so floppy label cdrom label_cdrom.so cdrom label sun label_sun.so floppy # Devices to use use cdrom drive /dev/dsk/c*s2 dev_cdrom.so cdrom%d use floppy drive /dev/diskette[0-9] dev_floppy.so floppy%d # Actions insert /vol*/dev/fd[0-9]/* user=root /usr/sbin/rmmount insert /vol*/dev/dsk/* user=root /usr/sbin/rmmount eject /vol*/dev/fd[0-9]/* user=root /usr/sbin/rmmount eject /vol*/dev/dsk/* user=root /usr/sbin/rmmount notify /vol*/rdsk/* group=tty user=root /usr/lib/vold/volmissing -p # List of file system types unsafe to eject unsafe ufs hsfs pcfs

To add a CD-ROM drive to the vold.conf file that does not match the default regular expression (/dev/rdsk/c*s2), you must explicitly list its device path and what symbolic name (with %d) you want the device path to have. For example, to add a CD-ROM drive that has the path /dev/rdsk/my/cdroms? (where s? are the different slices), add the following line to vold.conf (all on one line):

use cdrom drive /dev/rdsk/my/cdroms2 dev_cdrom.so cdrom%d

Then, when a volume is inserted in this CD-ROM drive. volume management will assign it the next symbolic name. For example, if two CD-ROMs match the default regular expression, they would be named cdrom0 and cdrom1; and any that match the added regular expression would be named starting with cdrom2.

For a diskette that does not match the vold.conf default regular expression (/dev/floppy[0-9]), a similar line would have to be added for the diskette. For example, to add a diskette whose path was /dev/my/fd0, you would add the following to vold.conf:

use floppy drive /dev/my/fd0 dev_floppy.so floppy%d

The CD-ROM pathname must have a directory component of rdsk (for the character device) and dsk for the block device. For example, if you specify the character device using the line:

use cdrom drive /dev/rdsk/my/cdroms2 dev_cdrom.so cdrom%d

then it is assumed that the block device is at

/dev/dsk/my/cdroms2

For floppy disks, Volume Management requires that the device pathnames end in either rfd[0-9] or rdiskette[0-9] for the character device, and fd[0-9] or diskette[0-9] for the block device. As with the other removable disks, it generates either the block name given the character name, or the character name given the block name.