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Watches a *nix network interface for status changes
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| #! /bin/bash | |
| watch_for_interface() | |
| { | |
| if (ifconfig "$1" | grep -q "status: active") | |
| then | |
| echo "[$1] state changed: active" | |
| echo "...do stuff here..." | |
| else | |
| echo "[$1] state changed: inactive" | |
| fi | |
| } | |
| INTERFACE=en0 | |
| export -f watch_for_interface | |
| export INTERFACE | |
| (echo -e "n.add State:/Network/Interface/${INTERFACE}/IPv4\nn.watch" & cat) | \ | |
| scutil | \ | |
| awk '/notification/ {system("watch_for_interface $INTERFACE")}' |
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