/usr/ is in libcsp-dev 1.4+fdd49b7+dfsg-3build1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/csp/drivers/
/usr/lib/
/usr/include/
/usr/include/csp/
/usr/include/csp/csp_autoconfig.h
/usr/include/csp/csp_rtable.h
/usr/include/csp/interfaces/
/usr/include/csp/interfaces/csp_if_can.h
/usr/include/csp/interfaces/csp_if_lo.h
/usr/include/csp/interfaces/csp_if_kiss.h
/usr/include/csp/interfaces/csp_if_zmqhub.h
/usr/include/csp/interfaces/csp_if_i2c.h
/usr/include/csp/arch/
/usr/include/csp/arch/csp_system.h
/usr/include/csp/arch/csp_semaphore.h
/usr/include/csp/arch/csp_time.h
/usr/include/csp/arch/csp_queue.h
/usr/include/csp/arch/csp_malloc.h
/usr/include/csp/arch/posix/
/usr/include/csp/arch/posix/pthread_queue.h
/usr/include/csp/arch/csp_thread.h
/usr/include/csp/arch/csp_clock.h
/usr/include/csp/csp_platform.h
/usr/include/csp/csp_iflist.h
/usr/include/csp/csp_crc32.h
/usr/include/csp/csp_interface.h
/usr/include/csp/csp_types.h
/usr/include/csp/csp_buffer.h
/usr/include/csp/drivers/i2c.h
/usr/include/csp/drivers/usart.h
/usr/include/csp/drivers/can.h
/usr/include/csp/csp.h
/usr/include/csp/csp_debug.h
/usr/include/csp/csp_error.h
/usr/include/csp/csp_endian.h
/usr/include/csp/csp_cmp.h
/usr/share/
/usr/share/doc/
/usr/share/doc/libcsp-dev/
/usr/share/doc/libcsp-dev/copyright
/usr/lib/libcsp.so
/usr/share/doc/libcsp-dev/changelog.Debian.gz