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)