/usr/ is in libstreams-dev 0.7.7-1.1ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/doc/
/usr/share/doc/libstreams-dev/
/usr/share/doc/libstreams-dev/copyright
/usr/lib/
/usr/lib/libstreams/
/usr/lib/libstreams/LibStreamsTargets-debug.cmake
/usr/lib/libstreams/LibStreamsConfig.cmake
/usr/lib/libstreams/LibStreamsTargets.cmake
/usr/lib/pkgconfig/
/usr/lib/pkgconfig/libstreams.pc
/usr/lib/strigi/
/usr/lib/strigi/StrigiConfig.cmake
/usr/include/
/usr/include/strigi/
/usr/include/strigi/dataeventinputstream.h
/usr/include/strigi/gzipinputstream.h
/usr/include/strigi/bz2inputstream.h
/usr/include/strigi/sdfinputstream.h
/usr/include/strigi/stringstream.h
/usr/include/strigi/fileinputstream.h
/usr/include/strigi/tarinputstream.h
/usr/include/strigi/bufferedstream.h
/usr/include/strigi/arinputstream.h
/usr/include/strigi/zipinputstream.h
/usr/include/strigi/archivereader.h
/usr/include/strigi/textutils.h
/usr/include/strigi/encodinginputstream.h
/usr/include/strigi/strigiconfig.h
/usr/include/strigi/cpioinputstream.h
/usr/include/strigi/inputstreamreader.h
/usr/include/strigi/substreamproviderprovider.h
/usr/include/strigi/inputstream.h
/usr/include/strigi/lzmainputstream.h
/usr/include/strigi/streambase.h
/usr/include/strigi/processinputstream.h
/usr/include/strigi/stringterminatedsubstream.h
/usr/include/strigi/rpminputstream.h
/usr/include/strigi/subinputstream.h
/usr/include/strigi/substreamprovider.h
/usr/include/strigi/oleinputstream.h
/usr/include/strigi/kmpsearcher.h
/usr/include/strigi/mailinputstream.h
/usr/include/strigi/streambuffer.h
/usr/share/doc/libstreams-dev/changelog.Debian.gz
/usr/lib/libstreams.so