debian/cloud-tools/hv_get_dhcp_info

   1 #!/bin/bash
   2
   3 # This example script retrieves the DHCP state of a given interface.
   4 # In the interest of keeping the KVP daemon code free of distro specific
   5 # information; the kvp daemon code invokes this external script to gather
   6 # DHCP setting for the specific interface.
   7 #
   8 # Input: Name of the interface
   9 #
  10 # Output: The script prints the string "Enabled" to stdout to indicate
  11 #       that DHCP is enabled on the interface. If DHCP is not enabled,
  12 #       the script prints the string "Disabled" to stdout.
  13 #
  14 # Each Distro is expected to implement this script in a distro specific
  15 # fashion.
  16
  17 #set -x
  18
  19 IF_FILE="/etc/network/interfaces"
  20 NMCMD="nmcli"
  21
  22 function checknetworkmanager {
  23         #Assumes if $NMCMD exists, inteface exists and interface is not
  24         #  in $IF_FILE then dhcp is being used by NM
  25         if  hash $NMCMD >/dev/null 2>&1  ; then
  26                 if  $NMCMD  dev status |grep -q $1  ; then
  27                         echo "Enabled"
  28                 else
  29                         echo "Disabled"
  30                 fi
  31         else
  32                 #Give up
  33                 echo "Disabled"
  34         fi
  35 }
  36
  37 if [ -z $1 ]  ; then echo "Disabled"; exit; fi
  38
  39 if [ -e $IF_FILE ]; then
  40         if grep -v -e "^#" $IF_FILE|grep -q $1 ; then
  41                 #interface exists so
  42                 if grep -q -e $1\.\*dhcp $IF_FILE; then
  43                         echo "Enabled"; exit;
  44                 else
  45                         echo "Disabled"; exit;
  46                 fi
  47         else
  48                 checknetworkmanager $1
  49                 exit
  50         fi
  51 else
  52         checknetworkmanager $1
  53         exit
  54 fi
  55