Perform a backup of an OpenWRT router.

bkup-openwrt.sh

#!/bin/sh
#
# Perform a backup of an OpenWRT router.
#

USAGE="usage: $0 [-v] [-i sshIdentityFile] host backupDir"


iflag=
xflag=

while getopts "i:v" option ; do
  case "$option" in
  i)
    iflag="-i $OPTARG"
    ;;
  v)
    xflag='-x'
    ;;
  *)
    echo "$USAGE" >&2
    exit 1
    ;;
  esac
done
shift `expr $OPTIND - 1`
if [ $# -ne 2 ] ; then
  echo "$USAGE" >&2
  exit 1
fi
Host="$1"
Dest_Dir="$2"

if [ ! -d ${Dest_Dir} ] ; then
  echo "$0: backup destination \"${Dest_Dir}\" does not exist" >&2
  exit 1
fi

Archive_File="${Host}-`date +%F`.tar.gz"

set -e $xflag
ssh $iflag root@${Host} sysupgrade --create-backup /tmp/${Archive_File} >/dev/null
scp -q $iflag root@${Host}:/tmp/${Archive_File} ${Dest_Dir}/${Archive_File}
ssh $iflag root@${Host} rm /tmp/${Archive_File}