#!/bin/sh
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html

#-------------------------------------------------------------------------------
#=head1  syslog 
#=head2  syslog command that setsup the syslogd for MS, SV and nodes.
#        On MS, it makes sure all the xCAT messages goes to /var/log/messages file,
#               it enables syslogd receving logs from remote machies. 
#        On MS, it sends all the messages to MS,
#               it enables syslogd receving logs from remote nodes. 
#        On node,  it sends all the messages its master.  
#        Input: none, it takes the following environment variables: 
#           OSVER: possible values are sles10, fedora8, redhat5, aix etc.   
#=cut
#-------------------------------------------------------------------------------

master=$MASTER
conf_file="/etc/syslog.conf"
sysconfig="/etc/sysconfig/syslog"
init="/etc/init.d/syslog"
ng=0
isSN=0
isLinux=1
isRsyslog=0
isC3=0

# pmatch determines if 1st argument string is matched by 2nd argument pattern

pmatch ()
{
  case $1 in
    $2) return 0;;  # zero return code means string matched by pattern
  esac

  return 1          # non-zero return code means string not matched by pattern
}

# is_lsb_ubuntu exit status indicates whether system appears to be Ubuntu.
# Using required /etc/lsb-release file, instead of optional lsb_release command.

is_lsb_ubuntu ()
{
    awk '
        (match($0, "^[ \t]*DISTRIB_ID=") == 1) {    # A DISTRIB_ID line
            id = substr($0, RLENGTH + 1)            # Save its value
        }

        END {
            # Examine last DISTRIB_ID value to see if Ubuntu indicated

            if (match(id, "^(Ubuntu|\"Ubuntu\")[ \t]*$") == 1) {
                exit 0    # Ubuntu
            }
            exit 1        # Not Ubuntu
        }

    ' /etc/lsb-release >/dev/null 2>&1

    # Routine exit status is exit status of the last command -- the awk script.
    #
    #   Note: if /etc/lsb-release does not exist, the exit status indicates
    #         failure (not Ubuntu), which is the correct outcome.
}

config_Rsyslog_C3()
{
  isReceiving=0
  isLocal=$1

  if [ -f /etc/xCATMN ] ||  [ $isSN -eq 1 ] 
  then 
    isReceiving=1
  fi

  if [ ! -f $2.XCATORIG ]; then
    cp -f $2 $2.XCATORIG
  else
    cat $2 > $2.XCATORIG
  fi

  grep "xCAT settings" $conf_file 2>&1 1> /dev/null
  if [ $? -eq 0 ]; then
       sed "/# xCAT settings/,$ d" $2 >/tmp/sed.tmp
       cat /tmp/sed.tmp >$2
  fi

  echo "# xCAT settings" >> $2
  #enable to receive remote logging
  if [ $isReceiving -eq 1 ]; then
      sed 's/^\#\(\s\)*\$ModLoad\(\s\)*imudp/\$ModLoad imudp/' $2 >/tmp/sed.tmp
      cat /tmp/sed.tmp >$2
      sed 's/^\#\(\s\)*\$UDPServerRun/\$UDPServerRun/' $2 >/tmp/sed.tmp
      cat /tmp/sed.tmp >$2
  fi

  #enable to send the logging to master
  if [ $isLocal -eq 1 ]; then
  #enable the MN to log all the logs from CN and MN itself
      sed 's/\(^[^\#].*\/var\/log\/messages\)/\#\1/g' $2 >/tmp/sed.tmp
      cat /tmp/sed.tmp >$2 
      echo "*.debug  /var/log/messages" >> $2
      touch  /var/log/messages  
  else
      sed 's/^\(\*\..*\)/\#\1/' $2 >/tmp/sed.tmp
      cat /tmp/sed.tmp >$2
      sed 's/^\(news\|local7\|mail\|authpriv\|cron\|kern\)\./\#\1\./' $2 >/tmp/sed.tmp 
      cat /tmp/sed.tmp >$2
      echo "*.* @$master" >> $2
  fi 
}

#echo "NTYPE=$NTYPE,OSVER=$OSVER,OSTYPE=$OSTYPE"

if [ $NTYPE = service ]; then 
  isSN=1
fi

if [ "$(uname -s)" = "Linux" ]; then
  if ( pmatch $OSVER "fedora*" ) || ( pmatch $OSVER "rhels5*" ) || ( pmatch $OSVER "rhel6*" ) || ( pmatch $OSVER "rhels6*" ) || [ -f /etc/fedora-release ] || [ -f /etc/redhat-release ] || ( pmatch $OSVER "ubuntu*" ) || ( is_lsb_ubuntu ) || ( pmatch $OSVER "debian*" ); then
    if [ -e /etc/rsyslog.conf ]; then
      conf_file="/etc/rsyslog.conf"
      sysconfig="/etc/sysconfig/rsyslog"
      init="/etc/init.d/rsyslog"
      isRsyslog=1
      if ( pmatch $OSVER "ubuntu*" ) || ( is_lsb_ubuntu ) || ( pmatch $OSVER "debian*" ); then
        sysconfig="/etc/default/rsyslog"
      fi
    fi
  else 
    if ( pmatch $OSVER "sles*" ) || ( pmatch $OSVER "suse*" ) || [ -f /etc/SuSE-release ]; then
      #find out which syslog is used for SLES, syslog or syslog-ng
      result=`grep "^SYSLOG_DAEMON=" $sysconfig 2>&1`
      if ( pmatch $result "*syslog-ng*" ); then
        conf_file="/etc/syslog-ng/syslog-ng.conf"
        ng=1
      fi
    fi
  fi 
else
  sysconfig=  #AIX does not have this file
  isLinux=0;
fi

#echo "isSN=$isSN, isLinux=$isLinux, ng=$ng"
#echo "sysconfig=$sysconfig, confgile=$conf_file"



#handle sysconfig file to make remote loggling possible 
if [ $isLinux -eq 1 ] && [ -e $sysconfig ]; then 
  if [ ! -f "$sysconfig.XCATORIG" ]; then
    cp -f $sysconfig $sysconfig.XCATORIG
  fi

  #check if it is ryslog version 3, it has totally different settings in /etc/syslog.cong
  if [ $isRsyslog -eq 1 ]; then
    grep "SYSLOGD_OPTIONS" $sysconfig | grep -e "[\-c 3|\-c3|\-c4|\-c 4]" 2>&1 1> /dev/null
    if [ $? -eq 0 ]; then
      isC3=1
    fi
  fi
  
  #no need to change anything for rsyslog version 3 for /etc/sysconf/rsyslog
  if [ $isC3 -eq 0 ]; then 
    if [ -f /etc/xCATMN ]; then
      #on MN: make the syslogd be able to receive remote logs 
      awk  '{if($0 ~ /^SYSLOGD_OPTIONS=|^SYSLOGD_PARAMS=/) {
            if ($0 !~ /-r/) {sub(/-/, "-r -", $0)}
            if (($0 !~ /-m0/) && ($0 !~/-m 0/)) { sub(/-/, "-m 0 -", $0)}
            print $0}
          else { print $0}}'  $sysconfig > $sysconfig.tmp 
    else
      if [ $isSN -eq 1 ]; then
        #on SN: make the syslog be able to receive and forward remote logs
        awk '{if($0 ~ /^SYSLOGD_OPTIONS=|^SYSLOGD_PARAMS=/) {
              if ($0 !~ /-r/) {sub(/-/, "-r -", $0)}
              if ($0 !~ /-h/) {sub(/-/, "-h -", $0)}
              if (($0 !~ /-m0/) && ($0 !~/-m 0/)) { sub(/-/, "-m 0 -", $0)}
              print $0}
            else { print $0}}'  $sysconfig > $sysconfig.tmp 
      else
        ##turn off the time marker on all 
        awk '{if($0 ~ /^SYSLOGD_OPTIONS=|^SYSLOGD_PARAMS=/) {
              if (($0 !~ /-m0/) && ($0 !~/-m 0/)) { sub(/-/, "-m 0 -", $0)}
              print $0}
            else {print $0}}' $sysconfig > $sysconfig.tmp 
      fi
    fi
    mv -f $sysconfig.tmp $sysconfig   
  fi
fi  


#syslog-ng has different way of enabling log forwarding
if [ $ng -eq 1 ]; then
  if [ $isSN -eq 1 -o -f /etc/xCATMN ]; then
    if [ ! -f $conf_file.XCATORIG ];  then
       cp -f $conf_file $conf_file.XCATORIG
    fi
    sed 's/#udp(ip("0.0.0.0/udp(ip("0.0.0.0/' $conf_file >/tmp/sed.tmp
    cat /tmp/sed.tmp >$conf_file
  fi
fi



#now handling where the logs go
goLocal=0;
if [ -f /etc/xCATMN ]; then
  goLocal=1
else 
  if [ $isSN -eq 1 ]; then
     if [ -n "$SVLOGLOCAL" ] && [ $SVLOGLOCAL -eq 1 ]; then
       goLocal=1  
     fi
  fi
fi

if [ $isC3 -eq 1 ]; then 
  config_Rsyslog_C3 $goLocal $conf_file
else
  if [ $goLocal -eq 1 ]; then
    #making sure all the messages goes to /var/log/messages
    touch  /var/log/messages 
    if [ $ng -eq 0 ]; then
      if [ ! -f $conf_file.XCATORIG ]; then
        cp -f $conf_file $conf_file.XCATORIG
      fi

      grep "xCAT settings" $conf_file 2>&1 1> /dev/null
      if [ $? -eq 0 ]; then
	  sed "/# xCAT settings/,$ d" $conf_file >/tmp/sed.tmp
      cat /tmp/sed.tmp >$conf_file
      fi

      if [ $isLinux -eq 0 ]; then # aix
          echo "# xCAT settings" >> $conf_file
          echo "*.debug   /var/log/messages  rotate 1024K files 5" >> $conf_file
      fi
    fi
    
    #Ubuntu doesn't have sysconfig 
    # so configuring the MN to receive UDP connections here.
    if ( pmatch $OSVER "ubuntu*" ) || ( is_lsb_ubuntu ) || ( pmatch $OSVER "debian*" ); then
      egrep \('^\$UDPServerRun 514'\|'^\$ModLoad imudp'\) $conf_file > /dev/null 2>&1;
      if [ $? -eq 1 ]; then
        echo "\$ModLoad imudp" >> $conf_file;
        echo "\$UDPServerRun 514" >> $conf_file;
      fi
    fi 
  else 
    #now make the syslogd fowarding the messages to the the master
    if [ $ng -eq 1 ]; then
      if [ ! -f $conf_file.XCATORIG ]; then
        cp -f $conf_file $conf_file.XCATORIG
      fi
      grep "xCAT settings" $conf_file 2>&1 1> /dev/null
      if [ $? -eq 0 ]; then
	  sed "/# xCAT settings/,$ d" $conf_file >/tmp/sed.tmp
      cat /tmp/sed.tmp >$conf_file
      fi
      echo "# xCAT settings" >> $conf_file
      echo "destination loghost { udp(\"$master\"); };" >> $conf_file
      echo 'log { source(src); destination(loghost); };' >> $conf_file
 
      # remove the settings that will log to local files
      sed -i '/destination messages/s/^/#/'  $conf_file
      sed -i '/destination(messages)/s/^/#/'  $conf_file
      sed -i '/destination warn/s/^/#/'  $conf_file
      sed -i '/destination(warn)/s/^/#/'  $conf_file
    else 
      if [ -f $conf_file.XCATORIG ]; then 
        rm -f $conf_file 
      else 
        mv -f $conf_file $conf_file.XCATORIG
      fi
      echo "# xCAT settings" > $conf_file
      if [ $isLinux -eq 0 ]; then
        echo "*.debug @$master" >> $conf_file
      else
        if ( pmatch $OSVER "ubuntu*" ) || ( is_lsb_ubuntu ) || ( pmatch $OSVER "debian*" ); then
          echo "\$ModLoad imuxsock" >> $conf_file
          echo "*.* @$master" >> $conf_file
        else
          echo "*.* @$master" >> $conf_file
        fi 
      fi
    fi
  fi
fi

#restart the syslog daemon to take the new conf file settings
if [ $isLinux -eq 0 ]; then
  PARSE_SRC_STATE="-e1d;s/.* \([a-zA-Z0-9]*\)$/\1/"
  state=$(LC_ALL=C lssrc -s syslogd | LC_ALL=C sed "$PARSE_SRC_STATE")
  if [ -n "$state" ] && [ "$state" = "active" ]; then
     stopsrc -s syslogd
  fi
     
  #wait for syslogd to fully started
  RETRY_LIMIT=30          # number of 2 second retry intervals (60 second total)
  i=$RETRY_LIMIT
  while :
  do
      ret=`LC_ALL=C startsrc -s syslogd 2>&1`
      if ( pmatch $ret "*PID*" ); then
        break
      fi

      i=$((i - 1))
      if [ $i -gt 0 ]; then
          sleep 2
      else
          break
      fi
  done
else 
  $init restart
fi

#keep a record
logger -t xCAT -p local4.info "Install: syslog setup"
exit 0
