Plan 9 from Bell Labs’s /usr/web/sources/plan9/386/include
d-rwxrwxr-x glenda sys 0 Jul 15 2018 ape --rw-rw-r-- glenda sys 1526 Apr 30 2013 u.h --rw-rw-r-- bootes sys 523 Dec 11 1999 ureg.h