Pod Linuxem funguje ok, pod macOS (+ brew) vyhazuje chyby:
awk: syntax error at source line 1
context is
{for(i=NF;i>0;i--) printf >>> i!= <<<
awk: illegal statement at source line 1
awk: illegal statement at source line 1
dig: '.sbl.spamhaus.org' is not a legal name (empty label)
dig: '.cbl.abuseat.org' is not a legal name (empty label)
dig: '.bl.spamcop.net' is not a legal name (empty label)
dig: '.pbl.spamhaus.org' is not a legal name (empty label)
dig: '.b.barracudacentral.org' is not a legal name (empty label)
Jak se budu nudit, zkusím to přespsat do Pythonu a překopat zadávání IP adres parametrem z CLI.