Guida avanzata di scripting Bash - Portale Posta DMI

}
echo "Searching for $IPADDR in whois.registro.br"
whois -h whois.registro.br "$IPADDR" >> $OUTFILE
fi
RIPEquery() {
echo "Searching for $IPADDR in whois.ripe.net"
whois -h whois.ripe.net "$IPADDR" > $OUTFILE
}
# Initialize a few variables.
# * slash8 is the most significant octet
# * slash16 consists of the two most significant octets
# * octet2 is the second most significant octet
Appendice A. Script aggiuntivi
slash8=‘echo $IPADDR | cut -d. -f 1‘
if [ -z "$slash8" ] # Yet another sanity check.
then
echo "Undefined error!"
exit $E_UNDEF
fi
slash16=‘echo $IPADDR | cut -d. -f 1-2‘
# ^ Period specified as ’cut" delimiter.
if [ -z "$slash16" ]
then
echo "Undefined error!"
exit $E_UNDEF
fi
octet2=‘echo $slash16 | cut -d. -f 2‘
if [ -z "$octet2" ]
then
echo "Undefined error!"
exit $E_UNDEF
fi
# Check for various odds and ends of reserved space.
# There is no point in querying for those addresses.
if [ $slash8 == 0 ]; then
echo $IPADDR is ’"This Network"’ space\; Not querying
elif [ $slash8 == 10 ]; then
echo $IPADDR is RFC1918 space\; Not querying
elif [ $slash8 == 14 ]; then
echo $IPADDR is ’"Public Data Network"’ space\; Not querying
elif [ $slash8 == 127 ]; then
echo $IPADDR is loopback space\; Not querying
elif [ $slash16 == 169.254 ]; then
echo $IPADDR is link-local space\; Not querying
elif [ $slash8 == 172 ] && [ $octet2 -ge 16 ] && [ $octet2 -le 31 ];then
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