Shell Programming and Scripting

 
while [ 1 -gt 0 ]
do
  find <dirname> -type f -name <fileName>
   if [ $? -eq 0 ]
   then
     echo file arrived
     else
     echo file yet to arrive. wait
     fi
done

#!/usr/bin/ksh

MYFILE=/here/it/is/myfile

Z=1
while (( $Z < 30 )); do
   if [ ! -e $MYFILE ]; then
      let Z=$Z+1
      sleep 1
   else
      echo it arrived
      exit 0
   fi
done

echo 30 seconds are over and it did not arrive
exit 1

filename="myfile"
for T in 5 5 5 5 5 5 X
do
        if [ "${T}" = "X" ]
        then
                echo "File ${filename} did not arrive"
                exit
        fi
        if [ -f "${filename}" ]
        then
                echo "File ${filename} arrived"
                break
        fi
        echo "File ${filename} yet to arrive. Waiting ${T} seconds"
        sleep ${T}
done
#
# Processing of ${filename} goes here