ifdata is a program to display network device information in a clean, simple format.
Display IPv4 address, fex, 192.168.1.1:
ifdata -pa eth0
Print yes or no if the interface exists.
ifdata -pe eth0
Return an exit code if device exists or not:
ifdata -e eth0
Print netmask:
ifdata -pn eth0
Print the broadcast address:
ifdata -pb eth0