Example of Checking File Status Codes

The example code that follows illustrates how file status checking is performed: first the first byte (status key 1) is interrogated; then, if more information is required, the second byte (status key 2) is interrogated.

 select recseq
     assign to "recseq.dat"
     file status is ws-file-status
     organization is record sequential.
 file section.
 fd recseq
    record contains 80 characters.
 01 recseq-fd-record  pic x(80).
 working-storage section.
 01 ws-file-status.
     05 status-key-1  pic x.
     05 status-key-2  pic x.
     05 binary-status redefines status-key-2 pic 99 comp-x.
 procedure division.
 perform check-status.
     evaluate status-key-1
      when "0" next sentence
      when "1" display "end of file reached"
         perform check-eof-status
      when "2" display "invalid key"
         perform check-inv-key-status
      when "3" display "permanent error"
         perform check-perm-err-status
      when "4" display "logic error"
      when "9" display "run-time-system error"
         perform check-mf-error-message
     if status-key-2 = "0"
         display "no next logical record"
      evaluate status-key-2
       when "2" display "attempt to write dup key"
       when "3" display "no record found"
      if status-key-2 = "5"
 display "file not found"
      evaluate binary-status
       when 002 display "file not open"
       when 007 display "disk space exhausted"
       when 013 display "file not found"
       when 024 display "disk error    "
       when 065 display "file locked      "
       when 068 display "record locked    "
       when 039 display "record inconsistent"
       when 146 display "no current record  "
       when 180 display "file malformed     "
       when 208 display "network error      "
       when 213 display "too many locks     "
       when other display "not error status "
           display binary-status