Cisco backup and restore over SSH

#!/bin/sh

# Copyright (C) 2015 Uco Mesdag
# Usage:    cisco-backup [--backup|--restore] [--file file] user@hostname
#   -b,--backup                     back up the configuration to a file or stout.
#   -r,--restore                    restore the configuration from a file.
#   -f file,--file file             set the path to the configuration file.


# Instructions: Use this script to backup or restore the configuration of your
#    cisco device via SSH.

usage() {
    echo "Usage:    $(basename "$0") [--backup|--restore] [--file file] user@hostname" >/dev/stdout
    echo "  -b,--backup                     back up the configuration to a file or stout." >/dev/stdout
    echo "  -r,--restore                    restore the configuration from a file." >/dev/stdout
    echo "  -f file,--file file             set the path to the configuration file." >/dev/stdout
}

if [ "$( echo $@ | grep '.*\(help\|\?\)$' )" ]
then
    usage
    exit 0
fi

ARGS=$(getopt -a -l backup,restore,file: -o b,r,f: -- "$@")

#Bad arguments
if [ $? -ne 0 ] || [ $# -lt 1 -o $# -gt 4 ]
then
    usage
    exit 1
fi

eval set -- "$ARGS"

while true;
do
    case "$1" in
        -b|--backup)
            shift;
            ACTION=backup;
            ;;
        -r|--restore)
            shift;
            ACTION=restore;
            ;;
        -f|--file)
            shift;
            if [ -n "$1" ]; then
                echo $1;
                FILE="$( cd $(dirname "$1") ; pwd )/$1";
                shift;
            fi
            ;;
        --)
            shift;
            break;
            ;;
    esac
done

if [ "x$@" == "x" ]
then
    echo -e "    ...no router address specified"
    exit 1
fi

if [ "$ACTION" == "restore" ] && [ "x$FILE" == "x" ]
then
    echo -e "    ...no ouput file specified"
    exit 1
fi

if [ "x$ACTION" == "x" ]
then
    ACTION=backup
fi

IFS="@"
set -- $@
if [ $# -eq 2 ]
then
    USER="$1"
    HOSTNAME="$2"
fi
unset IFS

if [ "$ACTION" == "backup" ]
then
    if [ $FILE ]
    then
        echo -e "    ...backing-up the router at $HOSTNAME to the file \"$FILE\""
        ssh $USER@$HOSTNAME "show running-config;exit" | sed \
            -e '/aaa/d' \
            -e '/^\r$/d' \
            -e '/^Building configuration.*/d' \
            -e '/^Current configuration.*/d' \
            -e '/^Connection to .* closed by remote host.*/d' \
            > "$FILE" \
            2>/dev/null
    else
        ssh $USER@$HOSTNAME "show running-config" | sed \
            -e '/aaa/d' \
            -e '/^\r$/d' \
            -e '/^Building configuration.*/d' \
            -e '/^Current configuration.*/d' \
            -e '/^Connection to .* closed by remote host.*/d' \
            2>/dev/null
    fi
fi

if [ "$ACTION" == "restore" ]
then
    echo -e "    ...restoring the router at $HOSTNAME from the file \"$FILE\""
    CONFIG="$( mktemp )"
    echo "configure terminal" > $CONFIG
    cat "$FILE" >> $CONFIG
    echo "exit" >> $CONFIG
    echo "copy running-config startup-config" >> $CONFIG
    ssh $USER@$HOSTNAME < $CONFIG >/dev/null 2>&1
fi