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DEVFS.CONF(5)             FreeBSD File Formats Manual            DEVFS.CONF(5)

     devfs.conf - boot-time devfs configuration information

     The devfs.conf file provides an easy way to set ownership and
     permissions, or create links for devices available at boot.

     It does not work for devices plugged in and out after the system is up
     and running, e.g. USB devices.  See devfs.rules(5) for setting ownership
     and permissions for all device nodes, and devd.conf(5) for actions to be
     taken when devices are attached or detached.

     Lines starting with a hash sign (`#') and empty lines are ignored.  The
     lines that specify devfs.conf rules consist of three parameters separated
     by whitespace:

     action  The action to take for the device.  The action names are only
             significant to the first unique character.

             The name of the device created by devfs(5).

     arg     The argument of the action.

     The actions currently supported are:

     link    This action creates a symbolic link named arg that points to
             devname, the name of the device created by devfs(5).

     own     This action changes the ownership of devname.  The arg parameter
             must be in the form of an owner:group pair, in the same format
             used by chown(8).

     perm    This action changes the permissions of devname.  The arg
             parameter must be a mode as explained in chmod(1).


     To create a /dev/cdrom link that points to the first SCSI(4) CD-ROM, the
     following may be added to devfs.conf:

           link    cd0     cdrom

     Similarly, to link /dev/cdrom to the first SCSI CD-ROM device, the
     following action may be used:

           link    cd0     cdrom

     To set the owner of a device, the own action may be specified:

           own     cd0     root:cdrom

     To set the permissions of a device, a perm action should be used:

           perm    cd0     0660

     chmod(1), devd.conf(5), devfs(5), devfs.rules(5), chown(8)

     This manual page was written by Roland Smith <[email protected]>.

FreeBSD 11.1-RELEASE-p4        October 13, 2015        FreeBSD 11.1-RELEASE-p4
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