#!/bin/ksh
# IBM_PROLOG_BEGIN_TAG 
# This is an automatically generated prolog. 
#  
# bos720 src/bos/usr/sbin/install/scripts/watch_config_files.sh 1.3 
#  
# Licensed Materials - Property of IBM 
#  
# Restricted Materials of IBM 
#  
# COPYRIGHT International Business Machines Corp. 2004,2006 
# All Rights Reserved 
#  
# US Government Users Restricted Rights - Use, duplication or 
# disclosure restricted by GSA ADP Schedule Contract with IBM Corp. 
#  
# IBM_PROLOG_END_TAG 

export PATH="/usr/bin:/usr/sbin:/dev:/etc:$PATH"

if [ -n "$INST_DEBUG" ]; then
   set -x
fi

BACKUP_DIR=/var/adm/config
OUTFILE=/var/adm/ras/config.diff
CHECKLIST=/tmp/check_config.files
PID=$$

if [ ! -f "/etc/check_config.files" ]; then
   return 0
fi

BEFORE=0
while getopts "bB" OPTION
do
   case $OPTION in
      b) BEFORE=1;;
      B) BEFORE=1;;
      *) BEFORE=0
   esac
done

## -----------------------------
##  "Establish baselines" phase
## -----------------------------
if [ $BEFORE -eq 1 ]; then
   if [ ! -d "$BACKUP_DIR" ]; then
      /usr/bin/mkdir -p $BACKUP_DIR 2>/dev/null
      if [ $? -ne 0 ]; then
         /usr/bin/dspmsg -s 3 cmdinstl_e.cat 34 \
"0503-028 %1$s:  Cannot create the directory %2$s.\n\
\tCheck permissions and available space.\n" geninstall $BACKUP_DIR
         return 0
      else
         /usr/bin/chmod 700 $BACKUP_DIR 2>/dev/null
      fi
   fi

   ## Strip out all comment lines, and default
   ## all path-only lines to "delete when done"
   cat /etc/check_config.files | egrep -v "^#" | \
       sed s/^"\/"/"d \/"/g > $CHECKLIST

   while read line; do
      CFGFILE=`echo $line | /usr/bin/awk '{print $2}'`
      if [[ -f $CFGFILE ]]; then
         SAVEPATH=`dirname $CFGFILE`
         if [ ! -d ${BACKUP_DIR}${SAVEPATH} ]; then
            /usr/bin/mkdir -p ${BACKUP_DIR}${SAVEPATH} 2>/dev/null
            if [ $? -ne 0 ]; then
               /usr/bin/dspmsg -s 3 cmdinstl_e.cat 34 \
"0503-028 %1$s:  Cannot create the directory %2$s.\n\
\tCheck permissions and available space.\n" geninstall $BACKUP_DIR
               return 0
            fi
         fi

         RC=0
         if [ -f ${CFGFILE} ] && [ -f ${BACKUP_DIR}${CFGFILE} ]; then
            /usr/bin/cmp -s ${BACKUP_DIR}${CFGFILE} ${CFGFILE} 2>/dev/null
            RC=$?
         else
            RC=1
         fi

         ## If we already have both "real" and "backup" files, and
         ## they're the same, we don't need to re-process them
         if [ $RC -ne 0 ]; then
            ## If different backup file exists, rename with $PID
            if [ -f ${BACKUP_DIR}${CFGFILE} ]; then
               /usr/bin/mv ${BACKUP_DIR}${CFGFILE} ${BACKUP_DIR}${CFGFILE}.${PID}
            fi
            ## Make a backup of the file we're watching
            /usr/bin/cp -fp $CFGFILE ${BACKUP_DIR}${SAVEPATH} 2>/dev/null
         fi
      fi
   done < $CHECKLIST

   rm -f $CHECKLIST 2>/dev/null

else
   ## ---------------------------------
   ##  We must be in the "AFTER" phase
   ## ---------------------------------
   NUM_MODS=0
   ## Rename an existing /var/adm/ras/config.diff file
   if [ -f $OUTFILE ]; then
      /usr/bin/mv $OUTFILE ${OUTFILE}.${PID}
   fi

   ## Strip out all comment lines, and default
   ## all path-only lines to "delete when done"
   cat /etc/check_config.files | egrep -v "^#" | \
       sed s/^"\/"/"d \/"/g > $CHECKLIST

   while read line; do
      SAVE_OR_DEL=`echo $line | /usr/bin/awk '{print $1}'`
      CFGFILE=`echo $line | /usr/bin/awk '{print $2}'`
      if [[ ! -f $CFGFILE ]] || [[ ! -f ${BACKUP_DIR}${CFGFILE} ]]; then
         continue
      fi
      /usr/bin/cmp -s ${BACKUP_DIR}${CFGFILE} ${CFGFILE} 2>/dev/null
      if [ $? -ne 0 ]; then
         let NUM_MODS=$NUM_MODS+1
         if [ $NUM_MODS -eq 1 ]; then
            echo
         fi
         dspmsg -s 22 cmdinstl_e 4 "File $CFGFILE has been modified.\n" $CFGFILE
         echo "=======================================================================" >> $OUTFILE
         echo "\t${CFGFILE}" >> $OUTFILE
         if [ $SAVE_OR_DEL = "s" ] || [ $SAVE_OR_DEL = "S" ]; then
            MESG=`dspmsg -s 22 cmdinstl_e 2 \
            "The original file was saved to ${BACKUP_DIR}${CFGFILE}.\n" \
            ${BACKUP_DIR}${CFGFILE}`
            echo "\t$MESG" >> $OUTFILE
         elif [ $SAVE_OR_DEL = "d" ] || [ $SAVE_OR_DEL = "D" ]; then
            MESG=`dspmsg -s 22 cmdinstl_e 3 "The original file was not saved.\n"`
            echo "\t$MESG" >> $OUTFILE
         fi
         /usr/bin/diff ${BACKUP_DIR}${CFGFILE} ${CFGFILE} >> $OUTFILE
      fi
      if [ $SAVE_OR_DEL = "d" ] || [ $SAVE_OR_DEL = "D" ]; then
         rm -f ${BACKUP_DIR}${CFGFILE} 2>/dev/null
      fi
   done < $CHECKLIST
   if [ $NUM_MODS -gt 0 ]; then
      echo
      dspmsg -s 22 cmdinstl_e 1 \
"One or more of the files listed in /etc/check_config.files have changed.\n \
\tSee /var/adm/ras/config.diff for details.\n"
   fi
   rm -f $CHECKLIST 2>/dev/null
   return $NUM_MODS
fi

return 0