Shell Programming and Scripting

#!/bin/ksh
#
# Function : is_file_arrived file
# Arg(s)   : file = file to verify
# Output   : None
# Status   : 0 = yes file arrived, 1 = no
# Env.     : IFA_WAIT : interval (secs) for file size check (def=5)
#
 
is_file_arrived() {
   [ -z "$1" ] && return 1
   local file=$1
   local arrived=1
   local size1 size2
   if [ -f "$file" -a -z "$(fuser $file 2> /dev/null)" ] ; then
      size1=$(ls -l $file 2>/dev/null | awk '{print $5}')
      sleep ${IFA_WAIT:-15}
      size2=$(ls -l $file 2>/dev/null | awk '{print $5}')
      [ ${size1:-1} -eq ${size2:-2} ] && arrived=0
   fi
   return $arrived
}
 
 
processFile ()
{
   local fileName=$1
   local fileExtension=$2
   local fileNewName="/datafiles/str${fileExtension}.asc"
   local filePrintPath="/print"
   local fileTmpPath="/tmp"
   local fileODIName="str${fileExtension}.pos"
   mv -Eignore $fileName $fileNewName      # Add status check
   prepup $fileNewName $fileExtension
   mv -Eignore  $filePrintPath/$fileODIName $fileTmpPath/$fileODIName
   save2tmp $fileExtension
   call_siu $fileExtension
}
 
# Main Processing
 
nsec=1
#while :
while [[ "$(date +%H%M)" -lt 2329 ]]
do
   for fileName in /datafiles/[Uu][Pp][Ll][Oo][Aa][Dd].[0-9][0-9][0-
9][0-9]
   do
      fileExtension=${fileName#*.}
      is_file_arrived "$fileName" && nsec=1 && processFile $fileName $fileExtens
ion
   done
   sleep $nsec
   case $nsec in
      1)   nsec=15;;
      15)  nsec=45;;
      45)  nsec=90;;
      90)  nsec=300;;
      300) nsec=600;;
      600) nsec=900;;
      *)   nsec=1800;;
   esac
done

[ ! -f "$0.log" ] && > $0.log

function log
{
  echo "$@" >> "$0.log"
}

log "File $FILENAME found."
log "File $FILENAME renamed to $FILENEWNAME"
log "File $FILENAME processed successfully"

function log
{
  echo "$@" >> "$0.log"
}
LOGFILE=$0.log
[ ! -f "$0.log" ] && > $0.log
log "something"

function log
{
  typeset logfile=$1
  shift
  echo "$@" >> $logfile
}
[ ! -f "$0.log" ] && > $0.log
log "$0" "something"