NAME

       /run/ifstate - interface state database

DESCRIPTION

       The /run/ifstate file describes the present state of the interface configuration -- namely, how many
       interfaces are up, how many dependencies each interface has which are up (the refcount), and whether or
       not an interface was explicitly brought up due to request or configuration.

FILE SYNTAX

       At a minimum, the /run/ifstate file contains at least one column, the physical to logical interface
       mapping.  This column is formatted as such:

           lo=lo
           eth0=eth0
           wlan0=work

       The left side of the mapping is the physical interface, while the right side is the logical interface.
       This field is required to be present.

       The next field is the reference count.  This is a number that reflects the number of active dependencies
       an interface has.  As interfaces are brought up and down, the refcount may change.  This field is
       optional.

       The final field denotes whether or not an interface was brought up explicitly -- either by being marked
       as auto or brought up manually using ifup(8).  The contents of this field if present is the explicit
       keyword.

EXAMPLES

       An example from a typical system with localhost, eth0 and a wireguard VPN:

           lo=lo 1 explicit
           eth0=eth0 2 explicit
           wg0=wg0 1 explicit

SEE ALSO

       interfaces(5)

AUTHORS

       Ariadne Conill <ariadne@dereferenced.org>

                                                   2022-02-16                                         ifstate(5)