106 lines
2.1 KiB
Bash
Executable File
106 lines
2.1 KiB
Bash
Executable File
#!/bin/sh
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# vim: set ts=4 et:
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set -e
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PROC="$(basename "$0")[$$]"
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DEBUG=
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log() {
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[ -z "$DEBUG" ] && [ "$1" = "debug" ] && return
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FACILITY="kern.$1"
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shift
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logger -s -p "$FACILITY" -t "$PROC" "$@"
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}
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if [ -z "$MDEV" ]; then
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log err "MDEV env not defined"
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exit 1
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fi
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RTABLE="${MDEV#eth}"
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let RTABLE+=1000
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IFACE_CFG=/etc/network/interfaces
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IFACE_DIR="${IFACE_CFG}.d"
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ip() {
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v=-4
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if [ "$1" = '-4' ] || [ "$1" = '-6' ]; then
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v="$1"
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shift
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fi
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OP="$2"
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[ "$OP" = show ] && LEV=debug || LEV=info
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if /sbin/ip "$v" "$@" || [ -n "$FAIL_OK" ]; then
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log "$LEV" "OK: ip $v $*"
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else
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log err "FAIL: ip $v $*"
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fi
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}
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assemble_interfaces() {
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log info "Rebuilding $IFACE_CFG"
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cd "$IFACE_DIR"
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cat lo > "$IFACE_CFG.new"
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for i in /sys/class/net/eth*; do
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IFACE="$(basename "$i")"
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[ ! -f "$IFACE" ] && sed -e "s/%%/$IFACE/g" DEFAULT > "$IFACE"
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cat "$IFACE" >> "$IFACE_CFG.new"
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done
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cp -a "$IFACE_CFG" "$IFACE_CFG.bak"
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mv "$IFACE_CFG.new" "$IFACE_CFG"
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}
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interface_up() {
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log info "Bringing up $MDEV"
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ifup "$MDEV"
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}
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cleanup_interface() {
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log info "Cleaning up $MDEV"
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# kill related udhcpc
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kill "$(cat "/run/udhcpc.$MDEV.pid")"
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# tidy up /run/ifstate, if it exists
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[ -f /run/ifstate ] && sed -i -e "/^$MDEV=/d" /run/ifstate
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# remove related rules
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for V in 4 6; do
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for P in $(ip -"$V" rule show table "$RTABLE" | cut -d: -f1); do
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ip -"$V" rule del pref "$P"
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done
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done
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}
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log info "STARTING: $ACTION $MDEV"
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if exec 200>>"$IFACE_CFG"; then
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if flock 200; then
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case $ACTION in
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add|"")
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assemble_interfaces
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interface_up
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;;
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remove)
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assemble_interfaces
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cleanup_interface
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;;
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*)
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log err "Unknown action '$ACTION'"
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exit 1
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;;
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esac
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else
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log err "Unable to flock $IFACE_CFG"
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exit 1
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fi
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else
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log err "Unable to assign fd 200 to flock $IFACE_CFG"
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exit 1
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fi
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log info "FINISHED: $ACTION $MDEV"
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