Update check_dyndns.sh.

This commit is contained in:
Christoph 2017-04-24 02:03:55 +02:00
parent 84c2c5582b
commit ee95ca3899

View File

@ -1,8 +1,25 @@
#!/usr/bin/env bash
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
function usage() {
#---------------------------------------
#-----------------------------
# Predifined Variables
#-----------------------------
#---------------------------------------
conf_file="/etc/ddclient.conf"
ddclient_script="/usr/sbin/ddclient"
_SKIP_IP=false
#---------------------------------------
#-----------------------------
# Functions
#-----------------------------
#---------------------------------------
usage() {
echo
@ -15,93 +32,136 @@ function usage() {
}
fatal(){
echo ""
echo -e " [ Fatal ] $*"
echo ""
echo -e "\tScript terminated.."
echo ""
exit 1
}
info (){
echo ""
echo -e " [ Info ] $*"
echo ""
}
ok (){
echo ""
echo -e " [ Ok ] $*"
echo ""
}
#---------------------------------------
#-----------------------------
# Evaluate command line
#-----------------------------
#---------------------------------------
[ $# -eq "0" -o $# -gt "2" ] && usage "wrong number of arguments"
DYNDNS_NAME=$1
_SKIP_IP=false
#---------------------------------------
#-----------------------------
# Some checks
#-----------------------------
#---------------------------------------
## - only run ddclient, if it is installed
## -
if [ ! -x "/usr/sbin/ddclient" ]; then
exit 0
# - Only run ddclient, if it is installed
# -
if [[ ! -x "$ddclient_script" ]]; then
fatal "Script '${ddclient_script}' not found!"
fi
# - Configuration present?
# -
if [[ ! -f "$conf_file" ]]; then
fatal "ddclient Configuration '${conf_file}' not found!"
fi
if [ -f "/etc/ddclient.conf" ]; then
## - read variable "if" from configurationd file "/etc/ddclient.conf"
## -
eval `sed -n 's/\(if=[^ ,]*\)/\1/p' /etc/ddclient.conf`
## - check if interface used by dyndns is present
##
if [ -n "$if" ];then
for _IFACE in `ifconfig | grep -e"^ppp" | cut -d" " -f1 `; do
if [ "$_IFACE" = $if ];then
PPP_IFACE=$_IFACE
break
fi
done
## - exit if no connection for dydns interface exists
## -
if [ "X" = "X$PPP_IFACE" ]; then
echo "No interface for dydns exists. exiting now.."
exit 0
fi
else
_SKIP_IP=true
fi
# - Running on a terminal?
# -
if [[ -t 1 ]] ; then
LOGGING=true
else
## - No configuration file found, so do not run
## -
echo "No configuration file \"/etc/ddclient.conf\" found, so do not run"
exit 0
LOGGING=false
fi
# - Check, if ddclient uses a local interface (variable "if")
# -
# - if true, interface name will be stored into variable 'if'
# -
eval `sed -n 's/\(if=[^ ,]*\)/\1/p' /etc/ddclient.conf`
# - Check if interface used by dyndns is present
#
if [ -n "$if" ];then
for _IFACE in `ifconfig | grep -e"^ppp" | cut -d" " -f1 `; do
if [ "$_IFACE" = $if ];then
PPP_IFACE=$_IFACE
break
fi
done
## - exit if no connection for dydns interface exists
## -
if [ "X" = "X$PPP_IFACE" ]; then
fatal "No interface for dydns exists."
fi
else
_SKIP_IP=true
fi
#---------------------------------------
#-----------------------------
# Update DynDNS IP-Address if needed
#-----------------------------
#---------------------------------------
if ! $_SKIP_IP ; then
PPP_REMOTE=`ifconfig $PPP_IFACE 2>/dev/null | grep -e "P-[tz]-P" | cut -d":" -f3 | cut -d " " -f1`
PPP_LOCAL=`ifconfig $PPP_IFACE 2>/dev/null | grep -e "P-[tz]-P" | cut -d":" -f2 | cut -d " " -f1`
fi
if [ "X$PPP_REMOTE" != "X" -a "X$PPP_LOCAL" != "X" ] ; then
if $_SKIP_IP ; then
# Load defaults
if [ -f /etc/default/ddclient ]; then
source /etc/default/ddclient
if [ "$run_daemon" = "true" ]; then
exit 0
fi
fi
/usr/sbin/ddclient
else
if [ "X$PPP_REMOTE" != "X" -a "X$PPP_LOCAL" != "X" ] ; then
DYNDNS_IP=`dig $DYNDNS_NAME +short`
#echo "$DYNDNS_NAME: $DYNDNS_IP - Local (PPP) IP: $PPP_LOCAL"
if [ "$DYNDNS_IP" != "$PPP_LOCAL" ] ; then
## - Run ddclient with the IP address of the ppp device
## -
echo "try to update ipadress entry at dyndns.org.."
echo
# - Run ddclient with the IP address of the ppp device
# -
info "Try to update ip-adress entry at dyndns.org.."
/usr/sbin/ddclient -syslog -ip $PPP_LOCAL
else
if $LOGGING ; then
ok "DynDNS IP is up-to-date"
fi
fi
fi
else
# - Load defaults
source /etc/default/ddclient
if [ "$run_daemon" = "true" ]; then
if $LOGGING ; then
info "'ddclient' is configured to run as daemon. So nothing to do here."
fi
else
if $LOGGING ; then
info "Going to run '${ddclient_script}'.."
fi
/usr/sbin/ddclient -file $conf_file
fi
fi
exit 0;