I have this Korn shell script that runs via a cron entry. It runs in a loop "watching" a specific file system for files with a certain name. The file system that it is watching is an upload file system for an FTP server. When files that are the correct name come in, it takes the extension of the file and runs several other scripts against the file with the extension as a vairable. The script looks like:

#!/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=$2
   local fileNewName="/ftp/datafiles/str${fileExtension}.asc"
   local filePrintPath="/ftp/print"
   local fileTmpPath="/ftp/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
#hile :
while [[ "$(date +%H%M)" -lt 2329 ]]
do
   for fileName in /ftp/datafiles/UPLOAD.[0-9][0-9][0-9][0-9]
   do
      fileExtension=${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

+ is_file_arrived /gers/genret/datafiles/UPLOAD.0043
+ nsec=1
+ processFile /gers/genret/datafiles/UPLOAD.0043 0043
mv: 0653-401 Cannot rename /gers/genret/print/str0043.pos to /gers/genret/tmp/str0043.pos:
             A file or directory in the path name does not exist.
mv: /gers/genret/datafiles/str0043.asc: The file access permissions do not allow
 the specified action.

Forgot to mention that this is running on AIX 5.2L.