HelenOS sources

abi/include/abi/log.h
kernel/generic/include/log.h
uspace/lib/c/include/io/log.h
uspace/lib/drv/include/ddf/log.h
uspace/lib/posix/include/libc/io/log.h
uspace/srv/audio/hound/log.h
HelenOS homepage, sources at GitHub