Shell Programming and Scripting

if [ -f a.txt -a -f b.txt -a -f c.txt ]
then
        if [ ! -s b.txt ]
        then
                # All 3 files exist but b.txt is empty
                echo "Rerun informatica process"
                exit
        else
                # All 3 files exist and b.txt is not empty
                # Continue process
                :
        fi
else
        # One or more files is missing presumably an error
        echo "One of more files is missing"
        exit
fi
# Normal process starts here

#!/bin/bash

# files we need to verify if they exist

ExistPath=("/path/to/file1.txt
                  /path/to/file2.txt
                  /path/to/file3.txt

")

for file in $ExistPath ; do

   if [[ -e $file ]]

   then /bin/echo "$file exists"

   else /bin/echo "$file does not exist"

    #now touch the file to update the time/date modified

   /usr/bin/touch $file
   
   fi

done

exit 0