A Dameon Script runnier and Log Rotator

daemonrunner.sh

 
YOUR_DIR=/opt/xxx 
SCRIPT_NAME=daemonrunner.sh
LOG_FILE=daemonrunnerLog.log
cd $YOUR_DIR
 




if [ $# -ne 1 ]
then
  echo "Usage: $SCRIPT_NAME -start|-stop"
  exit 1
fi

if [ X$1 = X-start ]
then
  if [ ! -d logs ]
  then
    mkdir logs
  fi

  TMP=/tmp/ps_$$
  /usr/ucb/ps -wwaux > $TMP

  if [ `grep -c "$SCRIPT_NAME -daemon" $TMP` -lt 1 ]
  then
    echo "Starting \"$SCRIPT_NAME\""
    nohup $SCRIPT_NAME -daemon 2>&1 | logmgr.pl $LOG_FILE 1000000 4 &
  fi

  rm -f $TMP
  exit 0
fi

if [ X$1 = X-stop ]
then
  TMP=/tmp/ps_$$
  /usr/ucb/ps -wwaux > $TMP

  for p in `grep "$SCRIPT_NAME -daemon" $TMP | nawk '{ print $2 }'`
  do
    echo "Stopping $SCRIPT_NAME -daemon (PID=$p)"
    kill -9 $p
  done

  rm -f $TMP
  exit 0
fi

if [ X$1 = X-daemon ]
then
  echo "`date`: Starting App"

     #Write your code to execute here
		
    echo "`date`: Exiting App"
done


fi

logrotator.pl

#!/usr/bin/perl
#
# logrotator.pl
#
#


$|=1;

if($#ARGV!=2)
{
  print STDERR "Usage: logmgr.pl logfile max_bytes num_files\n";
  exit(1);
}

$name=$ARGV[0];
$max_bytes=$ARGV[1];
$num_files=$ARGV[2];

&roll_files();
&do_open();

while(<STDIN>)
{
  print OUT "$_";

  $l=length($_);

  $t+=$l;

  if($t>=$max_bytes)
  {
    close(OUT);

    &roll_files();
    &do_open();
  }
}

exit(1);

sub roll_files
{
  $rm_file="${name}."."$num_files";

  if(-e $rm_file)
  {
    unlink("$rm_file");
  }

  for($i=$num_files;$i>0;$i--)
  {
    $to_fn=$name.".".$i;

    if(($i-1)==0)
    {
      $fr_fn=$name;
    }
    else
    {
      $fr_fn=$name.".".($i-1);
    }

    if(-e $fr_fn)
    {
      system("mv $fr_fn $to_fn");
    }
  }
}

sub do_open
{
  open(OUT,"> $name") || die "Cannot open \"${name}\" for writing: $!";
  select(OUT); $|=1; select(STDOUT);
  $t=0;
}