From: arne@vajhoej.dk   
      
   On 9/7/2025 9:42 AM, Arne Vajhøj wrote:   
   > But FFB and EBK are in the record attributes together   
   > with record format etc..   
   >   
   >  From a QIO perspective a file consist of N allocated   
   > blocks where N is a multipla of allocation size that   
   > can be read and write.   
   >   
   > It is also able to read when access and write when   
   > deaccess record attributes, but QIO does not use those   
   > itself.   
   >   
   > RMS use record attributes. RFM to know how to interpret   
   > records. And FFB and EBK to know where the logical EOF is.   
   >   
   > Point being that dropping RMS and data used by   
   > RMS does not provide a useful result.   
   >   
   > It is all a little bit of polemic of course, because   
   > obviously I know that Lawrence wanted to have QIO   
   > use the record attributed, ignore some parts (RFM)   
   > and use other parts (FFB and EBK) to emulate RMS.   
      
   Most probably already know this, but for the rest:   
      
   $ typ secret.txt   
   This is top secret.   
   $ write sys$output f$file("secret.txt","eof")," ",f$file("secret.txt","ffb")   
   1 22   
   $ set file/attr=(ebk:0,ffb:0) secret.txt   
   $ typ secret.txt   
   $ set file/attr=(ebk:1,ffb:22) secret.txt   
   $ typ secret.txt   
   This is top secret.   
      
   Arne   
      
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