[Astlinux-commits] SF.net SVN: astlinux:[8298] branches/1.0/package/wide-dhcpv6/dhcp6c.script

[<abe...@us...>]

Revision: 8298
          http://sourceforge.net/p/astlinux/code/8298
Author:   abelbeck
Date:     2017-05-11 21:24:35 +0000 (Thu, 11 May 2017)
Log Message:
-----------
wide-dhcpv6, dhcp6c.script, add 'dhcp6c_cache' file and 'dhcp6c_changed' exported env variable

Modified Paths:
--------------
    branches/1.0/package/wide-dhcpv6/dhcp6c.script

Modified: branches/1.0/package/wide-dhcpv6/dhcp6c.script
===================================================================
--- branches/1.0/package/wide-dhcpv6/dhcp6c.script	2017-05-11 15:24:04 UTC (rev 8297)
+++ branches/1.0/package/wide-dhcpv6/dhcp6c.script	2017-05-11 21:24:35 UTC (rev 8298)
@@ -6,6 +6,8 @@
 
 SCRIPTFILE="/mnt/kd/dhcp6c.script"
 
+CACHEFILE="/var/db/dhcp6c_cache"
+
 get_ipv6_global_addr()
 {
   local interface="$1"
@@ -41,6 +43,32 @@
   esac
 }
 
+update_cache()
+{
+  local changed
+
+  echo "## dhcp6c cache
+dhcp6c_interface=$dhcp6c_interface
+dhcp6c_address=$dhcp6c_address
+dhcp6c_prefix_interfaces=$dhcp6c_prefix_interfaces
+dhcp6c_prefix_addresses=$dhcp6c_prefix_addresses" > "$CACHEFILE.new"
+  chmod 600 "$CACHEFILE.new"
+
+  if [ -f "$CACHEFILE" ] && cmp -s "$CACHEFILE" "$CACHEFILE.new"; then
+    changed="no"
+    rm -f "$CACHEFILE.new"
+  else
+    if [ -f "$CACHEFILE" ]; then
+      changed="yes"
+    else
+      changed=""
+    fi
+    mv "$CACHEFILE.new" "$CACHEFILE"
+  fi
+
+  echo "$changed"
+}
+
 setup_env()
 {
   local conffile pd_1 prefix_len prefix_if interface ipv6 ipv6_ex cut_chars prefix_label IFS
@@ -48,6 +76,7 @@
   ## Globals to export
   dhcp6c_interface=""
   dhcp6c_address=""
+  dhcp6c_changed=""
   dhcp6c_prefix_interfaces=""
   dhcp6c_prefix_addresses=""
   dhcp6c_prefix=""
@@ -77,6 +106,8 @@
   dhcp6c_prefix_interfaces="${dhcp6c_prefix_interfaces#,}"
   dhcp6c_prefix_addresses="${dhcp6c_prefix_addresses#,}"
 
+  dhcp6c_changed="$(update_cache)"
+
   if [ -z "$dhcp6c_prefix_addresses" ]; then
     return
   fi
@@ -99,7 +130,7 @@
 
 if [ -x $SCRIPTFILE ]; then
   setup_env
-  export dhcp6c_interface dhcp6c_address
+  export dhcp6c_interface dhcp6c_address dhcp6c_changed
   export dhcp6c_prefix_interfaces dhcp6c_prefix_addresses
   export dhcp6c_prefix dhcp6c_prefix_base dhcp6c_prefix_len
 

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