i've set
/init
DYN_IP=$( dig A dyn.example.com @1.1.1.1 +short 2>/dev/null )
then use
%{DYN_IP}
in my SW configs, e.g. in /rules.
if I want to add a fallback value, what's the correct syntax/usage?
in fool_sm config, e.g., I use the form
checkip=${SW_ETH0_GATEWAY:-1.2.3.4}
where "SW_ETH0_GATEWAY" is an internal var.
with the dynamic addressvariable, DYN_IP
is it safe/valid to 'include' the fallback in the var defintion in /init as
DYN_IP=${ $( dig A dyn.example.com @1.1.1.1 +short 2>/dev/null ) :
-1.2.3.4 }
of course, using the *right* (???) syntax ..., and continue to use just
%{DYN_IP}
?
or, do I need to use
%{DYN_IP:-1.2.3.4}
or somesuch throughout?
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