/usr/ is in libsndio-dev 1.1.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/sndio.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/share/
/usr/share/doc/
/usr/share/doc/libsndio-dev/
/usr/share/doc/libsndio-dev/changelog.Debian.gz
/usr/share/doc/libsndio-dev/copyright
/usr/share/man/
/usr/share/man/man3/
/usr/share/man/man3/mio_open.3.gz
/usr/share/man/man3/sio_open.3.gz
/usr/lib/x86_64-linux-gnu/libsndio.so
/usr/share/man/man3/mio_close.3.gz
/usr/share/man/man3/mio_eof.3.gz
/usr/share/man/man3/mio_nfds.3.gz
/usr/share/man/man3/mio_pollfd.3.gz
/usr/share/man/man3/mio_read.3.gz
/usr/share/man/man3/mio_revents.3.gz
/usr/share/man/man3/mio_write.3.gz
/usr/share/man/man3/sio_close.3.gz
/usr/share/man/man3/sio_eof.3.gz
/usr/share/man/man3/sio_getcap.3.gz
/usr/share/man/man3/sio_getpar.3.gz
/usr/share/man/man3/sio_initpar.3.gz
/usr/share/man/man3/sio_nfds.3.gz
/usr/share/man/man3/sio_onmove.3.gz
/usr/share/man/man3/sio_onvol.3.gz
/usr/share/man/man3/sio_pollfd.3.gz
/usr/share/man/man3/sio_read.3.gz
/usr/share/man/man3/sio_revents.3.gz
/usr/share/man/man3/sio_setpar.3.gz
/usr/share/man/man3/sio_setvol.3.gz
/usr/share/man/man3/sio_start.3.gz
/usr/share/man/man3/sio_stop.3.gz
/usr/share/man/man3/sio_write.3.gz