Here is a list of all files with brief descriptions:

aacraid.h
atacmdnames.cpp
atacmdnames.h
atacmds.cpp
atacmds.h
ataidentify.cpp
ataidentify.h
ataprint.cpp
ataprint.h
cciss.cpp
cciss.h
cissio_freebsd.h
csmisas.h
dev_areca.cpp
dev_areca.h
dev_ata_cmd_set.cpp
dev_ata_cmd_set.h
dev_intelliprop.cpp
dev_interface.cpp
dev_interface.h
dev_jmb39x_raid.cpp
dev_legacy.cpp
dev_tunnelled.h
drivedb.h
farmcmds.cpp
farmcmds.h
farmprint.cpp
farmprint.h
freebsd_nvme_ioctl.h
json.cpp
json.h
knowndrives.cpp
knowndrives.h
linux_nvme_ioctl.h
megaraid.h
netbsd_nvme_ioctl.h
nvmecmds.cpp
nvmecmds.h
nvmeprint.cpp
nvmeprint.h
openbsd_nvme_ioctl.h
os_darwin.cpp
os_darwin.h
os_freebsd.cpp
os_freebsd.h
os_generic.cpp
os_generic.h
os_linux.cpp
os_linux.h
os_netbsd.cpp
os_netbsd.h
os_openbsd.cpp
os_openbsd.h
os_os2.cpp
os_os2.h
os_qnxnto.cpp
os_qnxnto.h
os_solaris.cpp
os_win32.cpp
popen_as_ugid.cpp
popen_as_ugid.h
scsiata.cpp
scsicmds.cpp
scsicmds.h
scsinvme.cpp
scsiprint.cpp
scsiprint.h
sg_unaligned.h
smartctl.cpp
smartctl.h
smartd.cpp
sssraid.h
static_assert.h
utility.cpp
utility.h