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Filename : mountnfs.sh
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#! /bin/sh
### BEGIN INIT INFO
# Provides:          mountnfs
# Required-Start:    $local_fs
# Required-Stop:
# Should-Start:      $network $portmap nfs-common  udev-mtab
# Default-Start:     S
# Default-Stop:
# Short-Description: Wait for network file systems to be mounted
# Description:       Network file systems are mounted by
#                    /etc/network/if-up.d/mountnfs in the background
#                    when interfaces are brought up; this script waits
#                    for them to be mounted before carrying on.
### END INIT INFO

. /lib/lsb/init-functions
. /lib/init/vars.sh
. /lib/init/mount-functions.sh

do_wait_async_mount() {
	# Read through fstab line by line. If it is NFS, set the flag
	# for mounting NFS file systems. If any NFS partition is found
	# then wait around for it.

	waitnfs=
	for file in "$(eval ls $(fstab_files))"; do
		if [ -f "$file" ]; then
			while read DEV MTPT FSTYPE OPTS REST; do
				case "$DEV" in
				  ""|\#*)
					continue
					;;
				esac
				case "$OPTS" in
				  noauto|*,noauto|noauto,*|*,noauto,*)
					continue
					;;
				esac
				case "$FSTYPE" in
				  nfs|nfs4|smbfs|cifs|coda|ncp|ncpfs|ocfs2|gfs|ceph)
					;;
				  *)
					continue
					;;
				esac
				case "$MTPT" in
				  /usr/local|/usr/local/*)
					;;
				  /usr|/usr/*)
					waitnfs="$waitnfs $MTPT"
					;;
				  /var|/var/*)
					waitnfs="$waitnfs $MTPT"
					;;
				esac
			done < "$file"
		fi
	done

	# Wait for each path, the timeout is for all of them as that's
	# really the maximum time we have to wait anyway
	TIMEOUT=900
	for mountpt in $waitnfs; do
		log_action_begin_msg "Waiting for $mountpt"

		while ! mountpoint -q $mountpt; do
			sleep 0.1

			TIMEOUT=$(( $TIMEOUT - 1 ))
			if [ $TIMEOUT -le 0 ]; then
				log_action_end_msg 1
				break
			fi
		done

		if [ $TIMEOUT -gt 0 ]; then
			log_action_end_msg 0
		fi
	done
}

case "$1" in
    start)
        # Using 'no !=' instead of 'yes =' to make sure async nfs
        # mounting is the default even without a value in
        # /etc/default/rcS
        if [ no != "$ASYNCMOUNTNFS" ] ; then
                do_wait_async_mount
        else
                FROMINITD=yes /etc/network/if-up.d/mountnfs
        fi
        ;;
    restart|reload|force-reload)
        echo "Error: argument '$1' not supported" >&2
        exit 3
        ;;
    stop|status)
        # No-op
        ;;
    *)
        echo "Usage: $0 start|stop" >&2
        exit 3
        ;;
esac

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