56 lines
889 B
Bash
Executable file
56 lines
889 B
Bash
Executable file
#!/bin/env bash
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conf=~/.etherswitch
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switch_state=0
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function check_fn {
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type $1 &> /dev/null || {
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>&2 echo "$1 is undefined"
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exit 1
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}
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}
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function load_config {
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unset -f on_switch_close
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unset -f on_switch_open
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source $conf
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if [ -z "$device" ]
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then
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>&2 echo "device is not set"
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exit 1
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fi
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# check if $device is a network device
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ip link show $device > /dev/null
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if [ $? -eq 1 ]; then exit 1; fi
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check_fn "on_switch_close"
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check_fn "on_switch_open"
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}
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# handle SIGTERM
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trap 'exit' 15
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# handle SIGHUP (config reload)
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trap 'load_config' 1
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load_config
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while :
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do
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ip link show $device | grep -q "LOWER_UP"
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if [ $? -eq 1 ]
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then
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if [ $switch_state -eq 1 ]
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then
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switch_state=0
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on_switch_open
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fi
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else
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if [ $switch_state -eq 0 ]
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then
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switch_state=1
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on_switch_close
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fi
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fi
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sleep 0.3
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done
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