/usr/share/octave/ is in octave-specfun 1.1.0-4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/octave/packages/
/usr/share/octave/packages/specfun-1.1.0/
/usr/share/octave/packages/specfun-1.1.0/Ci.m
/usr/share/octave/packages/specfun-1.1.0/Si.m
/usr/share/octave/packages/specfun-1.1.0/cosint.m
/usr/share/octave/packages/specfun-1.1.0/dirac.m
/usr/share/octave/packages/specfun-1.1.0/doc-cache
/usr/share/octave/packages/specfun-1.1.0/expint_E1.m
/usr/share/octave/packages/specfun-1.1.0/expint_Ei.m
/usr/share/octave/packages/specfun-1.1.0/heaviside.m
/usr/share/octave/packages/specfun-1.1.0/laguerre.m
/usr/share/octave/packages/specfun-1.1.0/lambertw.m
/usr/share/octave/packages/specfun-1.1.0/laplacian.m
/usr/share/octave/packages/specfun-1.1.0/multinom.m
/usr/share/octave/packages/specfun-1.1.0/multinom_coeff.m
/usr/share/octave/packages/specfun-1.1.0/multinom_exp.m
/usr/share/octave/packages/specfun-1.1.0/packinfo/
/usr/share/octave/packages/specfun-1.1.0/packinfo/DESCRIPTION
/usr/share/octave/packages/specfun-1.1.0/packinfo/INDEX
/usr/share/octave/packages/specfun-1.1.0/packinfo/NEWS
/usr/share/octave/packages/specfun-1.1.0/psi.m
/usr/share/octave/packages/specfun-1.1.0/sinint.m
/usr/share/octave/packages/specfun-1.1.0/zeta.m