RMMOUNT(8) Maintenance Procedures RMMOUNT(8)


rmmount - removable media mounter for CD-ROM, floppy, Jaz drive, and


/usr/sbin/rmmount [-D]


The rmmount utility is a removable media mounter that is executed by
volume management whenever a removable medium, such as a CD-ROM or a
floppy, is inserted. Removable media is managed by an application or a
volume manager. rmmount can also be called by using volrmmount(1).

Upon insertion of a medium and following invocation of the volcheck(1)
command, rmmount determines what type of file system (if any) is on that
medium. If a file system is present, rmmount mounts the file system in
one of the locations listed below.

For a diskette (floppy):

symbolic link to mounted floppy in local floppy

mounted named floppy

mounted unnamed floppy

For a CD-ROM or a DVD-ROM:


symbolic link to mounted CD-ROM in local CD-ROM drive


mounted named CD-ROM


mounted named CD-ROM with partitioned file system


mounted unnamed CD-ROM

For a Zip drive:

symbolic link to mounted Zip medium in
local Zip drive

mounted named Zip medium

mounted named Zip medium with partitioned
file system

mounted unnamed Zip medium

For a Jaz drive:

symbolic link to mounted Jaz medium in
local Jaz drive

mounted named Jaz medium

mounted named Jaz medium with partitioned
file system

mounted unnamed Jaz medium

For a generic "rmdisk" drive:


symbolic link to mounted removable medium in local removable medium


mounted named removable medium


mounted named removable medium with partitioned file system


mounted unnamed removable medium

If the media is read-only (for example, a CD-ROM or a floppy with write-
protect tab set), the file system is mounted read-only.

If a file system is not identified, rmmount does not mount a file system.
See the for more information on the location of CD-ROM, floppy, and
other media without file systems.

If a file system type has been determined, it is then checked to see that
it is "clean." If the file system is "dirty," fsck -p (see fsck(8)) is
run in an attempt to clean it. If fsck fails, the file system is mounted

After the mount is complete, "actions" associated with the media type are
executed. These actions allow for the notification to other programs that
new media are available.

Actions are executed in the order in which they appear in the
configuration file. The action function can return either 1 or 0. If it
returns 0, no further actions will be executed. This allows the function
to control which applications are executed.

In order to execute an action, rmmount performs a dlopen(3C) on the
shared object and calls the action function defined within it. The
definition of the interface to actions can be found in

File systems mounted by rmmount are always mounted with the nosuid flag
set, thereby disabling setuid programs and access to block or character
devices in that file system. Upon ejection, rmmount unmounts mounted file
systems and executes actions associated with the media type. If a file
system is "busy" (that is, it contains the current working directory of a
live process), the ejection will fail.


Turn on the debugging output from the rmmount dprintf calls.


shared objects used by rmmount.


volcheck(1), volrmmount(1), dlopen(3C), attributes(7), fsck(8)

March 1, 2007 RMMOUNT(8)