network manager - using a static "fallback /etc/hosts" if all other DNS options failed

if understand /etc/nsswitch.conf correctly, configuration

hosts:          files mdns4_minimal [notfound=return] dns

results in interpreting /etc/hosts, mdns , "regular" dns servers.

now love have option set static fallback definitions in case previous resolving options failed.

switching dns , files bad idea because call dns servers everytime.

so i'm looking solution work in case dns server failed (and there no match in /etc/hosts obviously).

if solution result in file manageable per user perfect.

you can't, @ least nss (name service switch) implemetation of glibc.

you can use action service (like mdns4_minimal using [notfound=return] in example). it's of form:

[status=action]

with preceding ! negate status.

the status can 1 of following four:

and action can 1 of following two:

here return return result without looking further lookup functions, , continue continue further. there no way mention file fallback.

you looking like:

hosts:   files mdns4_minimal [notfound=return] dns [notfound=/read/for/this/file]

which not possible.

in nutshell, looking non-existent action of nsswitch.

Primitatvve