File nfs of Package NetworkManager
#! /bin/bash
#
# nfs - start NFS in response to interface change
#
# Bastian Senst <bholst@lusku.de>
function net_umount {
umount -l -f $1 &>/dev/null
}
function net_mount {
mountpoint -q $1 || mount $1
}
function test_reach {
if [ "$(ip link show up $1)" = "" ]; then
return 1
else
ping -n -c1 -w2 -I "$1" "$2" 2>&1 > /dev/null
fi
}
DEVICE="$1"
COMMAND="$2"
function test_other_reaches {
for other in $(ls /sys/class/net); do
if [[ "$other" != "$DEVICE" ]]; then
if test_reach "$other" "$1"; then
return 0
fi
fi
done
return 1
}
declare -A reaches
function other_reaches {
if [[ "${reaches[$1]-}" == "yes" ]]; then
return 0
elif [[ "${reaches[$1]-}" == "no" ]]; then
return 1
else
if test_other_reaches $1; then
reaches[$1]="yes"
return 0
else
reaches[$1]="no"
return 1
fi
fi
}
NET_MOUNTS=$(sed -e '/^.*#/d' -e '/^.*:/!d' -e 's/\t/ /g' -e '/x-systemd.automount/d' /etc/fstab | tr -s " ")$'\n'
case "$COMMAND" in
up|dhcp4-change|dhcp6-change)
# Check with systemd if nfs service is enabled
if /usr/bin/systemctl is-enabled nfs-client.target >/dev/null 2>&1; then
printf %s "$NET_MOUNTS" | while IFS= read -r line; do
MOUNT_OPTIONS=$(echo $line | cut -f4 -d" ")
MOUNT_POINT=$(echo $line | cut -f2 -d" ")
FS_TYPE=$(echo $line | cut -f3 -d" ")
# Only mount it if not "noauto "set in options
case ",${MOUNT_OPTIONS}," in
*,noauto,*) continue ;;
esac
# Only mount it when the type is nfs or nfs4
if [ "$FS_TYPE" == "nfs" -o "$FS_TYPE" == "nfs4" ]; then
net_mount "$MOUNT_POINT"
fi
done
fi
;;
pre-down|down|vpn-pre-down)
printf %s "$NET_MOUNTS" | while IFS= read -r line; do
[[ $line ]] || continue
MOUNT_POINT=$(echo $line | cut -f2 -d" ")
FS_TYPE=$(echo $line | cut -f3 -d" ")
HOST=$(echo $line | cut -f1 -d":")
if other_reaches $HOST; then
echo >&2 "Other network interfaces reach $HOST for $MOUNT_POINT."
else
# Only unmount it when the type is nfs or nfs4
if [ "$FS_TYPE" == "nfs" -o "$FS_TYPE" == "nfs4" ]; then
net_umount "$MOUNT_POINT"
fi
fi
done
exit 0
;;
*)
exit 0
;;
esac