Shell Programming and Scripting

if [ ! -s $FILE ];
then
        echo "Error $FILE does not exists!"
else
        echo "$FILE found!"
fi

#!/usr/bin/expect -f

set filename "/tmp/file"
set file_status [file exists $filename]
if { $file_status > 0 } {
    set retcode [file size $filename]
    puts "$filename exists and is $retcode bytes."
} else {
    puts "$filename not found!"
}

set fnam "/home/popeye/testfile"
send_user "$fnam\n"
expect {
          "$fnam" {
                     send_user "found\n"
                     }
           timeout {
                      send_user "not found\n"
                      }
}