use abstraction barriers (init script) for restarting named

[moira.git] / gen / hesiod.sh

diff --git a/gen/hesiod.sh b/gen/hesiod.sh
index 269b8f832b50d1d998226c79f325883796438190..df865d6ffd7d43ffa75b7a3a9cd601027b2ab6e4 100644 (file)
--- a/gen/hesiod.sh
+++ b/gen/hesiod.sh
@@ -1,36 +1,135 @@
-#! /bin/sh
-TARFILE=/tmp/hesiod
+#!/bin/sh
+# This script performs updates of hesiod files on hesiod servers.
+# $Header$
+
+if [ -d /var/athena ] && [ -w /var/athena ]; then
+    exec >/var/athena/moira_update.log 2>&1
+else
+    exec >/tmp/moira_update.log 2>&1 
+fi
+
+set -x 
+
+PATH=/etc:/bin:/usr/bin:/usr/etc:/usr/athena/etc
+export PATH
+
+# The following exit codes are defined and MUST BE CONSISTENT with the
+# error codes the library uses:
+MR_HESFILE=47836472
+MR_MISSINGFILE=47836473
+MR_NAMED=47836475
+MR_TARERR=47836476
+
+umask 022
+
+# File that will contain the necessary information to be updated
+TARFILE=/var/tmp/hesiod.out
+# Directory into which we will empty the tarfile
 SRC_DIR=/etc/athena/_nameserver
+# Directory into which we will put the final product
 DEST_DIR=/etc/athena/nameserver
-if [ ! -d $SRC_DIR ]; then
-       /bin/rm -f $SRC_DIR
-       /bin/mkdir $SRC_DIR
-       /bin/chmod 755 $SRC_DIR
+
+INIT=/etc/init.d/athena-bind
+NAMED_PID=/var/athena/named.pid
+
+# Create the destination directory if it doesn't exist
+if test ! -d $DEST_DIR
+then
+   rm -f $DEST_DIR
+   mkdir $DEST_DIR
+   chmod 755 $DEST_DIR
 fi
-#if [ ! -d $DEST_DIR ]; then
-#      /bin/rm -f $DEST_DIR
-#      /bin/mkdir $DEST_DIR
-#      /bin/chmod 755 $DEST_DIR
-#fi
-cd $SRC_DIR
-for file in `/bin/tar tf $TARFILE`; do 
-       if [ ./ = $file ]; then continue; fi
-       /bin/tar xf $TARFILE $file
-       if [ -s $file ]; then
-               /bin/mv -f $file $DEST_DIR
-       else
-               /bin/rm -f $file
+
+# If $SRC_DIR does not already exist, make sure that it gets created
+# on the same parition as $DEST_DIR.
+if test ! -d $SRC_DIR
+then
+       # Tell linux cd/pwd not to be so "helpful".
+       # This will generate an ignorable error on older platforms.
+       set -P
+
+       cd $DEST_DIR
+       mkdir ../_nameserver
+       cd ../_nameserver
+       if test $SRC_DIR != `pwd`
+       then
+               ln -s `pwd` $SRC_DIR
        fi
+fi
+
+# make sure SRC_DIR is empty
+/bin/rm -rf $SRC_DIR/*
+
+# Alert if tarfile doesn't exist
+if test ! -r $TARFILE 
+then
+       exit $MR_MISSINGFILE
+fi
+
+cd $SRC_DIR
+tar xvf $TARFILE
+# Don't put up with errors extracting the information
+if test $? -ne 0
+then
+   exit $MR_TARERR
+fi
+for file in *
+do
+   # Make sure the file is not zero-length
+   if test ! -z $file
+   then
+      chmod o+r $file
+      mv -f $file $DEST_DIR
+      if test $? -ne 0
+      then
+          exit $MR_HESFILE
+      fi
+   else
+      rm -f $file
+      exit $MR_MISSINGFILE
+   fi
 done
 
-/bin/rm -f $TARFILE
-kill -KILL `/bin/cat /etc/named.pid`
+# Kill off the current named and remove the named.pid file.  It is
+# important that this file be removed since the script uses its
+# existance as evidence that named as has been successfully restarted.
+
+# First, get statistics
+/usr/athena/etc/rndc stats
+sleep 1
+$INIT stop
+rm -f $NAMED_PID
 
-csh -fc "unlimit; /etc/named"
+# Restart named.
+$INIT start
+sleep 1
+# This timeout is implemented by having the shell check TIMEOUT times
+# for the existance of $NAMED_PID and to sleep INTERVAL seconds
+# between each check.
 
+TIMEOUT=60                     # number of INTERVALS until timeout
+INTERVAL=60                    # number of seconds between checks
+i=0
+while test $i -lt $TIMEOUT
+do
+   if test -f $NAMED_PID
+   then
+       break
+   fi
+   sleep $INTERVAL
+   i=`expr $i + 1`
+done
+echo out of timeout loop
+# Did it time out?
+if test $i -eq $TIMEOUT 
+then
+       exit $MR_NAMED
+fi
+echo no timeout
+# Clean up!
+rm -f $TARFILE
+echo removed tarfile
 rm -f $0
-exit
-#
-#      $Source$
-#      $Header$
-#
+echo removed self
+
+exit 0