/usr/lib/x86_64-linux-gnu/octave/packages/image-2.2.2/x86_64-pc-linux-gnu-api-v49+/PKG_ADD is in octave-image 2.2.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | autoload ("bwlabel", which ("bwlabeln"));
autoload ("imdilate", which ("imerode"));
|