45 lines
1.1 KiB
Bash
Executable File
45 lines
1.1 KiB
Bash
Executable File
#!/bin/bash
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# Generate $INTERFACES_FILE on first boot
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# This will add any unconfigured network interfaces to /etc/network/interfaces
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# and configure them for DHCP
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INTERFACES_FILE="/etc/network/interfaces"
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# Serialize runs so that we don't miss hot-add interfaces
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FLOCK=${1:-}
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if [ -z "$FLOCK" ] ; then
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exec flock -x $INTERFACES_FILE $0 flocked
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fi
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function get_if_link() {
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cat /sys/class/net/${1}/carrier
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}
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for interface in $(ls /sys/class/net | grep -v ^lo$) ; do
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echo -n "Inspecting interface: $interface..."
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if ifquery $interface >/dev/null 2>&1 ; then
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echo "Has config, skipping."
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else
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ip link set dev $interface up >/dev/null 2>&1
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HAS_LINK="$(get_if_link $interface)"
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TRIES=3
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while [ "$HAS_LINK" == "0" -a $TRIES -gt 0 ]; do
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HAS_LINK="$(get_if_link $interface)"
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if [ "$HAS_LINK" == "1" ]; then
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break
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else
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sleep 1
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fi
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TRIES=$(( TRIES - 1 ))
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done
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if [ "$HAS_LINK" == "1" ] ; then
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printf "auto $interface\niface $interface inet dhcp\n\n" >>$INTERFACES_FILE
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echo "Configured"
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else
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echo "No link detected, skipping"
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fi
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fi
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done
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