gcc/testsuite/gfortran.dg/backspace_5.f

   1 !{ dg-do run }
   2 ! PR26464 File I/O error related to buffering and BACKSPACE
   3 ! Test case derived from case by Dale Ranta.
   4 ! Submitted  by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
   5       program test
   6       integer,parameter :: datasize = 1000
   7       dimension idata(datasize)
   8       idata = -42
   9       open (11, status="scratch", form="unformatted")
  10         idata(1)   =  -1
  11         idata(  datasize)   =  -2
  12        write(11)idata
  13         idata(1)   =  -2
  14         idata(  datasize)   =  -3
  15        write(11)idata
  16         idata(1)   =  -3
  17         idata(  datasize)   =  -4
  18        write(11)idata
  19         idata(1)   =  -4
  20         idata(  datasize)   =  -5
  21        write(11)idata
  22        read(11,end=        1000 )idata
  23        STOP 1
  24  1000  continue
  25        backspace 11
  26        backspace 11
  27        backspace 11
  28        read(11,end=        1001 )idata
  29        if(idata(1).ne.-3 .or. idata(datasize).ne.-4) STOP 2
  30        stop
  31  1001  continue
  32        STOP 3
  33  1010  stop
  34        end
  35