This file is indexed.

/usr/lib/petscdir/3.7.7/x86_64-linux-gnu-real-debug/include/petsc/finclude/ftn-custom/petscis.h90 is in libpetsc3.7.7-dbg 3.7.7+dfsg1-2build5.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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!
!  These are Fortran interfaces that are custom hand coded because
!  they cannot currently be generated automatically
!
#if !defined(PETSC_USE_FORTRAN_MODULES)
#include "petsc/finclude/ftn-custom/petscisdef.h90"
#endif
#include "petsc/finclude/ftn-custom/petscishide.h90"

      Interface
        Subroutine ISGetIndicesF90(i,array,ierr)
          USE_IS_HIDE
          PetscInt, pointer :: array(:)
          PetscErrorCode  ierr
         IS_HIDE       i
        End Subroutine
      End Interface


      Interface
        Subroutine ISRestoreIndicesF90(i,array,ierr)
          USE_IS_HIDE
          PetscInt, pointer :: array(:)
          PetscErrorCode ierr
         IS_HIDE      i
        End Subroutine
      End Interface

! ------------------------------------------------------

      Interface
        Subroutine ISBlockGetIndicesF90(i,array,ierr)
          USE_IS_HIDE
          PetscInt, pointer :: array(:)
          PetscErrorCode  ierr
         IS_HIDE       i
        End Subroutine
      End Interface


      Interface
        Subroutine ISBlockRestoreIndicesF90(i,array,ierr)
          USE_IS_HIDE
          PetscInt, pointer :: array(:)
          PetscErrorCode ierr
         IS_HIDE      i
        End Subroutine
      End Interface

! ------------------------------------------------------
      Interface
        Subroutine ISColoringGetISF90(ic,n,isa,ierr)
          USE_IS_HIDE
          IS_HIDE, pointer :: isa(:)
          PetscInt     n
          PetscErrorCode ierr
          ISCOLORING_HIDE ic
        End Subroutine
      End Interface

      Interface
        Subroutine ISColoringRestoreISF90(ic,isa,ierr)
          USE_IS_HIDE
          IS_HIDE, pointer :: isa(:)
          PetscErrorCode     ierr
          ISCOLORING_HIDE ic
        End Subroutine
      End Interface

      Interface
        Subroutine PetscSectionGetConstraintIndicesF90(s,p,a,ierr)
          USE_PETSCSECTION_HIDE
          PetscInt p
          PetscInt, pointer :: a(:)
          PetscErrorCode  ierr
          PETSCSECTION_HIDE       s
        End Subroutine
      End Interface

      Interface
        Subroutine PetscSectionRestoreConstraintIndicesF90(s,p,a,ierr)
          USE_PETSCSECTION_HIDE
          PetscInt p
          PetscInt, pointer :: a(:)
          PetscErrorCode  ierr
          PETSCSECTION_HIDE       s
        End Subroutine
      End Interface

      Interface
        Subroutine PetscSectionSetConstraintIndicesF90(s,p,a,ierr)
          USE_PETSCSECTION_HIDE
          PetscInt p
          PetscInt, pointer :: a(:)
          PetscErrorCode  ierr
          PETSCSECTION_HIDE       s
        End Subroutine
      End Interface