NFS Automount Script

#!/bin/bash
srcmnt="192.168.2.10:/mnt/storage/"
dstmnt="/home/zefie/terra/"

mounts=( anime homevid isos kenzi-backup share tvshows )


HOST=$(echo -n $srcmnt | cut -d':' -f1)
srcdown=1;
srcsrvup=0;

nmap=$(which nmap);
ping=$(which ping);
user=$(whoami)

check_host() {
    echo -n " * Waiting for $HOST "

    while [ $srcdown -ne "0" ]; do
        $ping -q -c 1 -w 1 $HOST &> /dev/null; srcdown=$?;
        if [ $srcdown -eq "0" ]; then
            break;
        fi
        echo -n '.'; sleep 3;
    done

    while [ $srcsrvup -ne "1" ]; do
        srcsrvup=$($nmap -sT -p 2049 -P0 -T5 -n $HOST | grep open | wc -l)
        if [ $srcsrvup -eq "1" ]; then
            break;
        fi
        echo -n '.'; sleep 3;
    done

    echo " Up."
}

mount_nfs() {

    if [ $(echo -n $nmap | wc -m) -le 1 ]; then
        echo "Error: nmap required";
        exit;
    fi

    if [ $(echo -n $ping | wc -m) -le 1 ]; then
        echo "Error: ping required";
        exit;
    fi


    for i in "${mounts[@]}"; do
        echo " * Preparing to mount ${srcmnt}${i} ..."
        if [ $(echo $srcsrvup) -ne "1" ]; then
            check_host
        fi

        if [ ! -d ${dstmnt}${i} ]; then
            mkdir -p ${dstmnt}${i}
        fi

        if [ "$(grep ${srcmnt}${i} /etc/mtab | wc -l)" -ne "1" ]; then
            skipmount=0
            echo -n " * Mounting ${srcmnt}${i} on ${dstmnt}${i} "
            while [ "$skipmount" -eq "0" ]; do
                if [ ! "$(grep ${srcmnt}${i} /etc/mtab)" ]; then
                    if [ "$user" = "root" ]; then
                        echo -n "as root..."
                        mount -t nfs ${srcmnt}${i} ${dstmnt}${i} &> /dev/null
                    else
                        if [ "$(grep ${srcmnt}${i} /etc/fstab | grep user | wc -l)" -eq "1" ]; then
                            echo -n "as non-root user ${user}..."
                            mount ${srcmnt}${i}
                        else
                            echo ""
                            echo " * Could not mount ${srcmnt}${i} .. You are not root, and mount is not user mountable in /etc/fstab"
                            skipmount=1
                        fi
                    fi
                    if [ "$skipmount" -ne "1" ]; then
                        if [ "$(grep ${srcmnt}${i} /etc/mtab | wc -l)" -ne "1" ]; then
                            echo -n "."
                            sleep 10
                        else
                            echo " Done."
                            skipmount=1
                        fi
                    fi
                fi
            done
        else
            echo " * Already mounted: ${srcmnt}${i} "
        fi
    done
}


umount_nfs () {
    for i in "${mounts[@]}"; do
        echo " * Preparing to unmount ${srcmnt}${i} ..."
        skipmount=0
        if [ "$(grep ${srcmnt}${i} /etc/mtab | wc -l)" -eq "1" ]; then
            dstmnt=$(grep ${srcmnt}${i} /etc/mtab | cut -d' ' -f 2);
            echo -n " * Unmounting ${srcmnt}${i} from $dstmnt "
            while [ "$skipmount" -eq "0" ]; do
                if [ "$(grep ${srcmnt}${i} /etc/mtab | wc -l)" -eq "1" ]; then
                    if [ "$user" = "root" ]; then
                        echo -n "as root..."
                        umount $dstmnt &> /dev/null
                    else
                        if [ "$(grep ${srcmnt}${i} /etc/fstab | grep user | wc -l)" -eq "1" ]; then
                            echo -n "as non-root user ${user}..."
                            umount ${srcmnt}${i}
                        else
                            echo ""
                            echo " * Could not unmount ${srcmnt}${i} .. You are not root, and mount is not user mountable";
                            skipmount=1
                        fi
                    fi
                    if [ "$(grep ${srcmnt}${i} /etc/mtab | wc -l)" -eq "1" ]; then
                        echo -n "."
                        sleep 10
                    else
                        echo " Done."
                        skipmount=1
                    fi
                fi
            done
        else
            echo " * Not mounted: ${srcmnt}${i} "
        fi
    done
}


case "$1" in

"mount")
    mount_nfs
    ;;

"umount")
    umount_nfs
    ;;

"unmount")
    umount_nfs
    ;;

*)
    echo "Usage: $0 [mount|umount]"
    ;;
esac