! { dg-do run }
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! { dg-do run }
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!
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!
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! PR fortran/43551
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! PR fortran/43551
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!
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!
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! Writes a 672000 byte file with buffering. The writing failed because
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! Writes a 672000 byte file with buffering. The writing failed because
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! of a missing lseek.
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! of a missing lseek.
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implicit none
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implicit none
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integer, parameter :: size = 2800 ! << needs to be large enough
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integer, parameter :: size = 2800 ! << needs to be large enough
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real(8) :: vec1(size,30), dummy(size)
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real(8) :: vec1(size,30), dummy(size)
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integer i
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integer i
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CALL RANDOM_NUMBER(vec1)
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CALL RANDOM_NUMBER(vec1)
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open(99, file='test.dat', form='unformatted', access='direct', recl=size*8)
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open(99, file='test.dat', form='unformatted', access='direct', recl=size*8)
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do i = 1, 10
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do i = 1, 10
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write(99,rec=i) vec1(:,i)
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write(99,rec=i) vec1(:,i)
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write(99,rec=i+10) vec1(:,i+10)
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write(99,rec=i+10) vec1(:,i+10)
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write(99,rec=i+20) vec1(:,i+20) ! << rec = 30 was written to rec = 21
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write(99,rec=i+20) vec1(:,i+20) ! << rec = 30 was written to rec = 21
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end do
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end do
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do i = 1, 10
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do i = 1, 10
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read(99,rec=i) dummy
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read(99,rec=i) dummy
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if (any (dummy /= vec1(:,i))) call abort()
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if (any (dummy /= vec1(:,i))) call abort()
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read(99,rec=i+10) dummy
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read(99,rec=i+10) dummy
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if (any (dummy /= vec1(:,i+10))) call abort()
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if (any (dummy /= vec1(:,i+10))) call abort()
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read(99,rec=i+20) dummy
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read(99,rec=i+20) dummy
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if (any (dummy /= vec1(:,i+20))) call abort() ! << aborted here for rec = 21
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if (any (dummy /= vec1(:,i+20))) call abort() ! << aborted here for rec = 21
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end do
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end do
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close(99, status='delete')
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close(99, status='delete')
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end
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end
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