Greg Wooledge:
wooledg:~$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode
DEFAULT group default qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP
mode DEFAULT group default qlen 1000
link/ether a0:8c:fd:c3:89:e0 brd ff:ff:ff:ff:ff:ff
Parsing the interface names out of THAT is significantly harder.
In support of my earlier point that some /other/ people /did/ make
modern |ifconfig| usable in such ways:
JdeBP % ifconfig -l
bge0 bge1 lo0 tun0
JdeBP %
Here's something from a script of mine:
list_available_network_interfaces() {
case "`uname`" in
Linux) /bin/ls /sys/class/net ;;
*) ifconfig -l ;;
esac
}
(Note that this is as loose as it is because I'm only targetting
Linux-based operating systems and the BSDs so far here. Also note that
this breaks on OpenBSD which does not have the |-l| option to
|ifconfig|. Fixing that is on the to-do list.)
