MOUNT_DEVFS(8)

NAME
mount_devfs - mount a device file system

SYNOPSIS
mount_devfs [-o options] node

DESCRIPTION
The mount_devfs command attaches an instance of the device file system (or devfs(5)) to the global file system namespace. This command is automatically executed for /dev at boot time.

The options are as follows:

-o  Specify mount options, which are a comma delimited set of options (see mount(8)). Supported mount options are:

    jail
        Mount devfs(5) for a jail. Only rules between jail yes and jail no are applied.

    ruleset=rule_file
        When mounting, apply the rules from the specified rule_file, which can be either an absolute path or one relative to /etc/devfs/.

Mounting an already mounted node clears and resets all rules that are in effect for it and (if a ruleset option is present) applies the rules from rule_file. It is equal to devfsctl -cr followed by an optional devfsctl -af.

EXAMPLES
Mount a devfs(5), marked as jail, with a ruleset file named default.rules onto /var/jail/dev.

    mount_devfs -o jail,ruleset=default.rules /var/jail/dev

A corresponding fstab(5) entry is:

    devfs /var/jail/dev devfs ro,jail,ruleset=default.rules

SEE ALSO
mount(2), unmount(2), devfs(5), fstab(5), devfsctl(8), mount(8)

HISTORY
The mount_devfs utility first appeared in DragonFly 2.3.